Multi-layer preformed billet for blow molding a container and method of its manufacture, multilayer vessel and method of its manufacture

 

(57) Abstract:

The invention relates to receptacles, multi-layer preformed the preparations for the manufacture of vessels and methods for their ishoponline. The workpiece and the vessel has at least two layers: the outer and inner with thick, differentiated by height. The inner layer of the billet is extruded layer and the outer layer is produced by molding under pressure. In the manufacture of laminated preformed blanks and vessel use tool for extrusion, provided with a means for setting the thickness of the material. The execution of the inner layer of the vessel with variable thickness provides savings of material in its manufacture. 4 C. and 25 C.p. f-crystals, 13 ill.

The invention relates to receptacles and preformed the preparations for the manufacture of vessels, and more specifically to multilayer vessels and preformed the preparations for the manufacture of vessels.

Usually multi-layered vessels are made using different materials for the layers, while each material has a special property that makes it suitable to perform a specific function layer. Multilayer vessels make, the U.S. patent N 4741936 disclosed laminated, preformed billet for manufacturing a multilayer polyester bottles. A method of manufacturing a preformed workpiece includes forming a joint extrusion tube having inner and outer layers of a complex of the polyester formed mainly of links bilateraltrade, and the intermediate layer of the inhibiting oxygen resin located between the inner and outer layers. It is also desirable between two adjacent layers to place the binder resin. The thickness of the layers of the multilayer tube is set constant. A method of manufacturing a preformed workpiece includes external cooling of injection molded multi-layer tube by contact with water and at the same time the introduction of the inert gas inside the tube to cool the inner part. Then the tube is formed by extrusion in a multilayer elongated bottle. In U.S. patent N 4741936 disclosed multilayer bottle of the multiple layers having different properties for different functions, but not disclosed method or a device for changing the thickness of selected portions of the bottles and of the individual layers. In accordance with this, the thickness of each hour is remenisant vessel.

In U.S. patent N 4646925 disclosed manufactured by injection molding multi-layer preformed workpiece for the manufacture of bottles by extrusion. Preformed billet contains hallowindow portion with an open end and a portion for coupling with the cover. It also contains a thick glass part, designed for pulling, and a closed bottom portion. Gerlovina part and the inner walls of the bottom and the glass parts are made as one piece from a thermoplastic polyester. A thin intermediate layer of the inhibiting gas thermoplastic resin is formed on the inner walls of the glass and the bottom parts so that the upper end of the intermediate layer reaches a point that is slightly below Golovino part. The outer layer is a thermoplastic polyester formed in such spatial relation that it covers the intermediate layer. The connection is carried out directly on the intermediate layer between the outer layer and Golovino part slightly below Golovino part. In the manufacture of preformed billet molding thickness directly depends on the configuration form. Therefore, the design especially the degree of freedom when changing material thickness, which is necessary to reduce the limitations associated with various functions. Because different parts of the vessels perform various functions, it is often desirable to change the thickness of the walls of the vessel in a specific part based on its function. For example, when part of the vessel is used as a support of the entire vessel, for additional strength, it is desirable to make a thicker wall. However, this additional thickness may be undesirable for other parts of the vessel, for example to the side walls of the specified factors as flexibility, transparency and efficiency of material usage. Therefore, for single-layer and multi-layer vessels it is often desirable to change the thickness of the layers in different parts of the vessel.

In U.S. patent N 3869056 disclosed a multilayered hollow plastic container. The vessel has an inner thermoplastic layer and an outer layer that is obtained by pressing. The vessel also has as one open hallowindow or tipping part, the thickness of the layers in Golovino and tipping the parts is greater than the thickness of the layers in other parts of the vessel. At the upper end of the vessel inner layer of the vessel overlaps the outer layer of the vessel in Golovino or tipping part. Although this paten, other parts can't be made with varying thickness.

Thus, in the manufacture of vessels there is a need to create a preformed billet and the receptacle having a number of layers of material, the thickness of the layers should vary with high precision to maintain the functions of specific parts of the vessel, and also to provide a method for manufacturing them.

The main objective of the present invention is to create educated from a number of layers of the preformed billet and container and method for manufacturing them, in which at least one layer has a varying thickness in different parts of the vessel.

Another object of the invention is to create a preformed billet and method of manufacture for subsequent fabrication of the vessel, very convenient for re-use.

Another object of the invention is to create a preformed billet and the container, and method for manufacturing them, with the number of layers in which the inner layer has a minimum thickness in order to conserve material, but varies in thickness in different parts for different fu is authorized billets and vessel, and method of manufacturing them, in which each layer has a specific function, for example as a barrier layer in contact with the contents of the layer and the outer layer.

The aforementioned problems are solved by having features of the invention multi-layer preformed blanks intended for the manufacture of multilayer vessel and method of its manufacture, and preformed billet contains extruded inner layer comprising an upper portion having a first thickness and adapted for forming the upper part of the vessel. The inner layer also includes extruded intermediate portion having a second thickness greater than the first thickness. The intermediate portion is adjacent to the top and adapted for forming an intermediate part of the vessel. The inner layer also includes extruded bottom portion having a third thickness greater than the second thickness. The bottom portion is adjacent to the intermediate portion and adapted to form the bottom part of the vessel. Preformed billet also contains obtained under the pressure of the outer layer. In one embodiment of the preformed billet has a barrier layer mater what stupa, which overlaps the upper ends of the barrier layer and the outer layer.

Method for manufacturing multi-layer preformed workpiece includes preparation tools for the extrusion, provided with a means for setting the thickness of the material, the extrusion of the at least first layer of material by means of extrusion and molding preformed liner that forms a cavity, and change the thickness of the liner along the length of the preformed billet, mainly during the stage of extrusion, using tools for installation thickness. This method can optionally include the introduction of a preformed liner in a form for injection molding and die casting another layer of material covering the first layer and forming the outer shell preformed blanks. The method may also include stage setting means for setting the thickness of the material to get the first size of the top, setting means for setting the thickness of the material to obtain the second dimension of the intermediate portion, and the second size is larger in thickness than the first size, and configuration tools for installation that is second size.

The vessel made from preformed blanks described above, contains the upper part of the casing is formed of at least the inner layer and the outer layer of material, while the inner layer of material has a first thickness in the upper part of the casing. The vessel also includes an intermediate part of the casing is formed of at least inner and outer layers of material. The inner layer of material has a second thickness in the intermediate part of the casing, which is less than the first thickness in the upper part of the casing, and the intermediate portion of the shell is such that is adjacent to the upper part of the casing. The vessel also contains a bottom part of the shell with the legs formed of at least the inner layer and the outer layer material. The inner layer of material has a third thickness in the bottom part of the shell is greater than the second thickness in the intermediate part of the casing, and the bottom part of the shell is located so that adjoins the intermediate part of the casing, and adapted to serve as a support vessel.

A method of manufacturing a vessel contains in addition to the above-described stages of education preformed workpiece stage inflatable formula is Ino of the molded workpiece. Accordingly, the preformed billet acquires the configuration form for inflation, which creates the configuration of the vessel. This results in the multi-layer vessel having a changing thickness of the inner shell.

Details of the present invention set forth in the following description and drawings in which the same reference signs refer to similar elements.

Fig. 1 is a vertical projection of the preformed workpiece according to the invention.

Fig. 1A, 1B and 1C are enlarged cross-sections of different areas preformed billet of Fig. 1, showing the relative thickness change between different areas of preformed blanks.

Fig. 1D is an enlarged cross-section of the upper end of the preformed workpiece according to the invention in Fig. 1.

Fig. 2A and 2B is a simplified representation of a method for the manufacture of preformed blanks, showing the stage of extrusion, the stage of cutting and stage injection molding according to the invention.

Fig. 3 is a vertical projection and an enlarged cross section of a preformed on the 2B.

Fig. 4 is a vertical projection of the vessel, made in accordance with the stages of the method shown in Fig. 2A and 2B.

Fig. 4A, 4B and 4C are enlarged cross-sections of different areas of the vessel, showing the relative thickness of the layers forming the vessel.

Fig. 5 is a vertical projection showing a method for blow molding preformed billet in the container.

Further detail the drawings, in which identical reference numbers and letters indicate the same elements. In Fig. 1 shows a vertical projection of the preformed workpiece in accordance with the principles of the present invention, indicated generally by the number 10. In a typical case, the preformed blank 10 includes having the thread and the flange of the upper part 12, an inclined intermediate portion 14, a vertical intermediate portion 16 and bottom portion 18. In the configuration shown in Fig. 1, the preformed blank 10 is adapted for forming blown into the vessel (shown in Fig. 4) in accordance with the principles of the present invention.

Now let us turn to Fig. 1A, showing a preformed blank 10, preferably from hlatywayo outer layer 24. As can be seen from Fig. 1A-1C, the thickness of the inner layer is changed in accordance with the specific parts of the preformed workpiece 10. In the three-layer embodiment of the barrier layer 22 and outer layer 24 to maintain a constant thickness of AA and BB, respectively, essentially, all over the body preformed workpiece 10. The outer layer changes thickness in with the thread and the flange of the upper part 12. The inner layer 20 varies in thickness depending on the part of the bottle, i.e. with the thread and the flange of the upper part 12, inclined and vertical intermediate portions 14 and 16 and bottom 18.

Preferably, if the inner layer 20 and the barrier layer 22 is extruded through the extrusion method, discussed below, and the outer layer 24 is formed on the extruded layers using the method of pressure casting, which allows having a threaded upper portion 12. The result of using the extrusion method, the thickness of the inner layer 20 can be adjusted depending on the functions that should be performed by different parts that make up preformed blank 10 and the vessel.

Changes in the thickness of the inner layer 20 is desirable for several reasons the variable strength. Efficient use of material displayed on the example of the inner layer 20 in the upper part 12, in which the inner layer 20 is the thinnest. Considerations of strength confirmed bottom part 18, which requires reinforcement and, as a consequence, the inner layer 20 thickest.

Now thoroughly consider Fig. 1A-1C, which are enlarged detailed views of areas 1A, 1B, and 1C, respectively, highlighted in Fig. 1, where the inner layer 20 is made preferably of polyethylene terephthalate or polyethylene-naphthalate. Polyethylene-naftalin, if its use as an inner layer in contact with the contents, authorizes the Department for quality control of food and pharmaceutical products (FDA), is the preferred material. The barrier layer 22 is performed, preferably of polyethylene-naphthalate, Saran and copolymers of ethylene and vinyl alcohol or copolymers with Acrylonitrile, such as Barex 210. The term Saran is used in its conventional, commercial sense, when assumed the polymers obtained, for example, by the polymerization of vinylidene chloride with vinyl chloride or methyl acrylate. Additional monomers can also be clubsoda a barrier to oxygen, also well-known.

As shown in Fig. 1A, the thickness of the inner layer 20 in the intermediate parts is denoted as CC. The thickness of the CC is the average thickness compared with the thickness at the top and bottom parts. In the intermediate portions 14 and 16 of the layer average thickness is used because this stretch wrappers preformed blanks used for the purposes of deduction, but not for support. Now let us turn to Fig. 1B, in which the thickness of the inner layer 20 is shown for the bottom part 18 as a DD. The thickness DD is greater than the thickness of the CC, and the thickness DD exceeds the thickness of the CC is about 25-30%. Large thickness DD preferable for the bottom part 18, for the reason that bottom part 18 is used to support vessel (shown in Fig. 4) made from preformed blanks 10. The bottom part of the form provided in the legs of the supporting part (shown in Fig. 4) and so she forced a thicker because it has to withstand the weight of the vessel and its contents. With regard to Fig. 1C, as it is shown, the inner layer 20 has a thickness of CC until then, until it reaches having a threaded upper portion 12 of the preformed workpiece 10. In having threaded upper portion 12, the thickness of the inner layer Foscolo in having threaded upper portion 12 there is no need to have a means to hold or support, it is preferable that the applied thickness EE provided the material savings.

In Fig. 1A-1C, the barrier layer 22 and outer layer 24 is shown having a constant thickness of AA and BB, respectively. Since the barrier layer 22 is extruded together with the inner layer 20, the thickness may also vary. However, in General this is not necessary, since the barrier layer 22 functions only as a barrier to substances, but not as a means to support, and the constant thickness of the barrier is quite sufficient for his actions regardless of the thickness of the other layers. The thickness of the BB of the outer layer 24 is given by injection molding (shown schematically in Fig. 2B) and in a typical case, it is the same throughout preformed workpiece 10. In a typical case, the outer layer 24 is used for constructive change preformed workpieces, for example for the formation of a thread with the purpose of sealing caps, and later of the vessel (shown in Fig. 4), and to solve aesthetic problems, for example to give the vessel the desired color or marking.

An enlarged cross-sectional view having a threaded upper portion 12 of the preformed workpiece 10 shown Nai 10, the inner layer 20 has a protrusion 28, elongated, essentially, across the inner layer 20 and passing through the upper edges 30 and 32 of the barrier layer 22 and outer layer 24, respectively. The configuration of the protrusion and its connection with the barrier layer 22 and outer layer 24 are formed during the execution of the method, discussed below, i.e., a combination of stages of extrusion and injection molding. The ledge 28 create to save the inner layer 20 as a single layer, which is held in contact with the vessel (shown in Fig. 4) content even when you delete the contents of the vessel, for example by the spill.

A method of manufacturing a preformed workpiece 10 will be described with reference to Fig. 2A and 2B. In the manufacture of preformed blanks 10 inner layer 20 and the barrier layer 22 (see Fig. 1) if used, is extruded through the extruder 33 and the extrusion head 34. In accordance with this, the melt 36 is formed in an essentially cylindrical configuration element 37 that is used for the manufacture of cylindrical shell preformed workpiece 10. To change the thickness of the top, intermediate and bottom parts preformed samanie 38 is made, preferably in the form of a rod provided with a head with a finger, designed for reciprocating movement and adjacent to the zone 40 exit of the melt 38 through the sleeve 42 of the head. By reciprocating movement of the finger 38 of the head, you can choose the thickness of the shell being formed with a cylindrical shaped element 37, in essence, its inner layer 20 (see Fig. 1). However, that depends on the design of the extruder 33, the barrier layer 22 (see Fig. 1) can be extruded together with the inner layer 20 and may have a variable thickness along the parts that comprise preformed blank 10, so as to effectively use the material forming the barrier layer. In addition, the sleeve 42 of the head can be adjustable in direction, mainly transverse to the flow of the melt to obtain an uneven thickness of the inner layer 20 in the circumferential direction. That is part of the inner layer 20 located on the same circumference of the line will have a different thickness.

Extrudate emerges from the extrusion head 34 as having a cylindrical shape element 37 continuous length. Therefore, the element 37 may be cut to cut Eski (not shown), set during the blow molding after extrusion head 34.

As discussed above in the description of Fig. 1D, the inner layer 20 preformed billet 10 has a ledge 28, which passes over the outer layer 24 and barrier layer 22, if it is used. The protrusion 28 is formed through the combined effects of the extruder 33 (shown in dotted lines) and the extrusion head 34, and by subsequent finishing extruded element 37 after removing it from the mold to blow. Finishing is performed using the device for cutting, as shown in Fig. 2B.

By controlling the reciprocating movable finger 38 of the head and moving it relative to the sleeve 42 of the head and relative to the outlet zone 40 the thickness of the element 37 can be changed in its length to obtain the desired relationship of the thickness to the diameter, as described previously. As shown in Fig. 2A, the element 37 extends from the extrusion head 34 and is directed into the air forming machine 52, in which it will form a circular edge 48 by means of the profile form 50 to blow. While in the form of 50 for inflating the extruded element 37 transform through rathdowne the MS inflatable molding in this form, that element is formed of two liners, United ends, provided with a rib 48 in the middle. Molded element 49 having the desired thickness, then cooled to the proper temperature and remove from the mold 50 for inflating the air forming machine 52. During the process of blow molding the ends of the molded element 49 are welded, resulting in appears excessive plastic 55. In addition, the portion 57 extends beyond the length of the preformed billet 53 and is used to facilitate the cutting of the molded element 49 and the formation of fin 48. The device 46 for cutting is used to remove excess material 55 and part 57 of the moulded element 49 on the subsequent cutting operation to form a preformed liner 53. By cutting the upper part 57 formed element 49 form a ledge 28 that he passed over the outer layer formed in the subsequent process of injection molding.

After the liner 53 with the air forming machine 52 takes the form shown in Fig. 3, the liner 53 is transferred into the injection molding machine 54, shown in dotted lines in Fig. 2B, provided with a form of the form 56 for injection molding has the configuration of the preformed workpiece 10, it is shown in Fig. 1. Injection molding machine 54 injects the outer layer 24 over the entire liner 53 to complete the formation of preformed blanks. As discussed above, the preferred melt used for the formation of the outer layer 24 is recycled polyethylene terephthalate suitable for aesthetic characteristics, for example color, appearance, and functional characteristics, for example threads and flanges. However, as discussed above, except the top, having a threaded portion 12, the thickness of the outer layer 24 as formed by the injection molding machine 54, is stored as a constant thickness of BB (see figure 1). While maintaining this same thickness preformed workpiece can be more easily removed from the mold 56 for injection molding.

Now let us turn to Fig. 4, which shows the vessel 58, made from preformed blanks 10 (see Fig. 1) by way of blow molding, which will be discussed below. Like preformed the workpiece receptacle 58 includes having a threaded upper portion 60, an inclined intermediate portion 62, predominantly vertical intermediate portion 64 and the properties and relative thickness, which, however, differ from those that have layers of materials described in relation to the preformed workpiece 10 in Fig. 1.

Refer to figures 4A-4C are enlarged detailed views of areas 4A, 4B and 4C, respectively, highlighted in Fig. 4; the vessel 58 consists of an inner layer 68, the barrier layer 70 and the outer layer 72. Because the inner layer 68 is not subject to inflation, as discussed below, when forming the configuration of the vessel, the relationship of the thicknesses between the different parts of the vessel are different from those cited above for the inner layer 20 preformed workpiece 10 (see Fig. 1). Fig. 4A, 4B and 4C correspond to figures 1A, 1B and 1C for preformed workpiece 10, and the thickness of the A-E correspond to the thicknesses AA-EE. As shown in Fig. 4A, the inner layer 68 has a thickness C in the inclined and vertical intermediate portions 62 and 64, respectively. The thickness C is the smallest in comparison with the layer thickness in other parts. As shown in Fig. 4B, the inner layer 68 has a thickness D, which is greater than the thickness C is equipped with legs bottom 66 to increase the supporting area of the vessel 58. In a typical case, the thickness D of the inner lining in the bottom case depending at least in part, on the size of the vessel, which may be the reason that the thickness D is greater than or less than the thickness e is equipped with legs bottom 66 of the inner layer 68 convert many located around the circumference of the legs 74, the function of which is to make the vessel 58 stable supports on a flat surface. The legs 74 are located around the circumference of the lower end 76 of the vessel 58. Each leg 74 is limited by the recess at each of its vertical side; each of the grooves extends from the Central region of the bottom of the vessel 58 upward to the rim of the vessel 58 toward the upper end 78 of the vessel 58. Due to the increased thickness of the inner layer 68, which forms provided the bottom of the legs 66, the legs 74, essentially, more solid and less flexible than the intermediate part 62 and 64.

Now according to Fig. 4C in having threaded upper portion 60, directly corresponding with the threads of the upper part 12 of the preformed workpiece 10 (see Fig. 1), the inner layer 68 has a thickness E which is larger than the thickness C of the intermediate section, since it is not subjected to the inflatable molding. As discussed above in relation to the preformed workpiece 10, and as shown in Fig. exceptions contact external reusable layer 72 with the content coming out of the vessel 58. Above it was described in more detail with reference to the preformed workpiece 10 and method for manufacturing it.

Multi-layer construction of the vessel 58 is advantageous for the implementation of the currently existing software reuse. Essentially, the layers forming the vessel 58, easily separated by breaking them into parts and therefore can be properly distributed to return into circulation. Consequently, if a particular material cannot be reused, it will not affect the return to the circulation of another layer. When using more than one material, and the layers are not separated, return to the circulation of blood vessels can be difficult because the materials cannot be separated and properly categorized. Using a multilayer structure disclosed in the description, this separation and categorization is achieved, and at the same time be controlled by the thickness of the material.

Now with reference to Fig. 5 will be described a method of manufacturing a vessel 58 (see Fig. 4). A method of manufacturing a vessel 58 covers a method of manufacturing a preformed sagaidis 53 using an injection molding machine 54, formed preformed blank 10, which is then removed from the mold 56 for injection molding. After extraction, the preformed blank 10 is placed in a mold 80 to blow, shown in Fig. 5. Prior to placing preformed workpiece 10 in the form of 80 to blow it must be heated. If preformed blank 10 is quickly removed from the injection molding machine 54 and is placed in a molding machine 82 to blow, shown in dotted lines in Fig. 5, the preformed blank 10 can be sufficiently heated. Otherwise preformed blank 10 must be installed in the heater (not shown) before placing it in the form of 80 to blow. According Fig. 5 preformed blank 10 is placed in the form of 80 to blow and is firmly held therein by means of the clutch form with the threads of the upper part 12. After the preformed blank is set accordingly, the molding machine 82 to fan used to blow preformed workpiece 10 to the configuration of the vessel 58 (see Fig. 4), shown dotted Lansdowne through the upper part 12, supported protected from blow molding affecting the remaining parts of the preformed workpiece during the formation of the vessel. After the preformed blank 10 is converted into the vessel, form 80 to blow open, and the finished vessel 58 as shown in Fig. 4, remove.

With regard to figures 1-5, for preformed workpiece 10 and the receptacle 58, is manufactured by forming methods that are considered for each of them above, you can use two layers instead of three. In this case, a typical barrier layers 22 and 70 are not used, and the liner 53 is formed of a single layer, the inner layer 20. In this case, the same method as described above, is used for injection molding of the outer layer 24 over the inner layer 20. The final stage of conversion preformed workpiece 10 in the vessel by means of blow molding are the same as described above. In addition, as for the thickness of the inner layer 20 and inner layer 70, it is preferable to use the same ratio between the thicknesses of the individual parts, as discussed above.

What concerns the methods described above for the manufacturer which can be automated by installing a set of interrelated units, adapted to perform the above stages. In U.S. patent N 5244610 and N 5240718 disclosed rotary machine for molding plastics blown, combining stage extrusion pre-molded preform and blow molding preformed blanks. Each of these patents owned by assignee of the present invention, and a device for molding described in them, these are included in the description for use with this invention by reference.

The main advantage of the present invention is that provided preformed blank and the vessel (and method for forming them), having a number of layers, in which at least one layer has a varying thickness in different parts of the preformed workpiece and the vessel, with different functions. Another advantage of this invention lies in the fact that the preformed blank and method of forming it enables the manufacture of the vessel, which is very convenient to return to the circulation. Another advantage of this invention lies in the fact that the preformed blank and the vessel envisage the means of various functions. Another advantage of this invention is that provides multi-layer preformed billet and the container, in which each layer performs a specific function, such as the barrier layer in contact with the contents of the layer and the external aesthetic/functional layer.

Obviously, in accordance with this invention proposed a multilayer vessels and preformed blanks, which fully satisfies the goals, means and advantages set out above. Although the invention has been described with reference to specific embodiments, it is obvious that in the light of the preceding description for specialists in the art will be visible many alternatives, modifications and variations. In accordance with this, we mean that all such alternatives, modifications and variations are within the nature and broad scope of the applied claims.

1. Multi-layer preformed preparation for the blow molding of the vessel, including covering the inner layer, which forms a cavity and includes an upper portion adapted for forming in the upper part of the vessel, an intermediate portion, primic the General to the intermediate portion and adapted for forming a bottom portion of the vessel, and an outer layer that is located near the inner layer, wherein the inner layer is extruded layer, and its upper part has a first thickness, its intermediate portion has a second thickness greater than the first thickness, and the bottom portion has a third thickness greater than the second thickness, and the outer layer is a layer obtained by injection molding.

2. Procurement under item 1, characterized in that it further includes extruded barrier layer of material located between the inner and outer layers, and the barrier layer extruded together with the inner layer.

3. Procurement under item 1, characterized in that the inner and outer layers have a top edge and the top edge of the inner layer covers the upper edge of the outer layer.

4. Procurement under item 3, characterized in that the upper edge of the inner layer is elongated, essentially, across the intermediate part of the inner layer and over the upper edge of the outer layer.

5. Procurement under item 1, characterized in that the outer layer is formed from recycled plastic, and the inner layer is formed from polyethylene terephthalate.

6. Procurement under item 1, characterized in that it includes barierki obtained by molding layer includes having a threaded upper portion, located near the upper part of the inner layer.

8. Procurement under item 1, characterized in that the outer layer is colored.

9. A method of manufacturing a multi-layer preformed workpiece having a thickness, differentiated by the length involving the use of tools for extrusion, characterized in that used vehicle for extrusion, provided with a means for setting the thickness of the material, extruded preformed liner having at least an inner layer of material by means of extrusion alter the thickness of the inner layer along the length of the preformed liner, essentially, during extrusion tool for thickness setting and cast under pressure from the external layer of material located near the inner layer.

10. The method according to p. 9, characterized in that it further form the preformed liner to the configuration of the preformed billet through the air forming machine.

11. The method according to p. 9, characterized in that during extrusion preformed liner optional co-extruded barrier layer mA is correctly molded liner has a first end and a side surface to form a protrusion on the first end, the speaker at the side surface of the insert.

13. The method according to p. 12, characterized in that it further includes a step of forming, in which push the edge on the side surface of the inner liner toward the side surface of the preformed liner, and cut preformed liner on the edge for education projection on the first end of the preformed liner.

14. The method according to p. 13, characterized in that the outer layer has an upper edge and impose additional preformed liner in a form for casting under pressure and carry out injection molding, including the casting of the outer layer of material located near the preformed liner so that the top edge is essentially adjacent to the first end, and the protrusion passes over the top edge.

15. The method according to p. 9, characterized in that the inner layer of the preformed liner consists of an upper part, an intermediate part and a bottom part, and changing the thickness of the additional regulating means for setting the thickness of the material to get the first thickness of the upper part, adjust the tool for, and regulating means for setting the thickness of the material to produce a third the thickness of the bottom part, greater than the second thickness.

16. Multilayer vessel containing the upper part of the shell, intermediate shell and the bottom part of the shell, while the intermediate part of the casing is formed from at least inner and outer layers and is located near the top of the shell, the bottom part of the casing is formed from at least inner and outer layers, located near the intermediate part of the casing and adapted to maintain the vessel, characterized in that the upper part of the shell is formed from at least the inner layer and the outer layer, the inner layer of material has a first thickness in the upper part of the casing, a second thickness in the intermediate part of the casing, less than the first thickness in the upper part of the casing, and a third thickness in the bottom part of the shell is greater than the second thickness in the intermediate part of the casing.

17. Vessel under item 16, wherein the barrier includes a layer of material in the form of copolymers of ethylene and vinyl alcohol.

18. Vessel under item 16, characterized in that the inner layer of material formed from polietilene is the, which further comprises a barrier layer located between the inner and outer layers.

20. Vessel under item 19, characterized in that the barrier layer is formed by extrusion.

21. Vessel under item 19, characterized in that the barrier layer has essentially the same thickness.

22. Vessel under item 16, characterized in that it has an upper end, and inner and outer layers have upper edges that are near the upper end, the upper edge of the inner layer covers the upper edge of the outer layer.

23. Vessel under item 16, characterized in that the inner layer is extruded and molded by the blast, and the outer layer is injection molded and formed by the blast.

24. Vessel under item 16, wherein the third thickness is substantially equal to the first thickness.

25. Vessel under item 16, wherein the third thickness is greater than the first thickness.

26. A method of manufacturing a multilayer vessel from preformed blanks, having a thickness, differentiated by the length involving the use of tools for extrusion, characterized in that used vehicle for extrusion, provided with a means for setting thematerial, by means of extrusion, change the thickness of the inner layer along the length of the preformed liner, essentially, during extrusion tool for thickness setting and cast under pressure from the external layer of material near the inner layer, is formed into preformed blank and carry out blow molding in a vessel.

27. The method according to p. 26, characterized in that during extrusion preformed liner co-extrusion barrier layer of material near the inner layer.

28. The method according to p. 26, characterized in that the inner layer of the preformed liner consists of an upper part, an intermediate part and a bottom part, and changing the thickness of the additional regulating means for setting the thickness of the material to get the first thickness of the upper part, adjust the means for setting the thickness of the material to obtain a second thickness of the intermediate part, smaller than the first thickness, adjust the tool to install the thickness of the material to produce a third the thickness of the bottom part, greater than the second thickness.

29. The method according to p. 28, characterized the liner free from blow molding and molded the upper part of the shell of the vessel, having the first thickness, carry out blow molding of the intermediate part of the inner layer preformed liner in the intermediate portion of the shell of the vessel, the intermediate portion of the shell has a second thickness smaller than the upper part of the shell, and carry out blow molding the bottom part of the inner layer preformed liner in the bottom part of the shell of the vessel, while the bottom portion has a third thickness greater than the thickness of the intermediate part of the casing.

 

Same patents:

Capacity for food // 2129509
The invention relates to packaging and is designed for packaging, storage and transportation of food products

Airtight containers // 2125956

Bottle // 2120897

The invention relates to containers, in particular a semi-rigid foldable containers

The invention relates to containers, in particular a semi-rigid foldable containers

Polymer bottle // 2110455
The invention relates to storage tanks for liquids which when empty can be converted into the pot for seedlings

FIELD: packing equipment, particularly for storing liquids.

SUBSTANCE: compressible bottle comprises side walls having bellows structure including several neighboring folds. Each fold is formed of two opposite surfaces having different widths and including fixing means to prevent initial fold shape recover after compressing thereof.

EFFECT: increased storage reliability during beverage consumption from bottle, improved bottle stability.

7 cl, 8 dwg

Food container // 2246432

FIELD: packing equipment, particularly container having integral body molded of plastics.

SUBSTANCE: container is molded of thermoplastic sheet or film material. Container has vessel extended in longitudinal direction defined by bottom and lower side walls. Front longitudinal side wall extends at α angle to bottom. Rear longitudinal wall extends at β angle to bottom.

EFFECT: provision of container filling orifice edge inclined towards front side wall, displacing center of container gravity towards front longitudinal side wall relative corner defined by container bottom and rear longitudinal wall thereof.

2 dwg

FIELD: pharmaceutical industry.

SUBSTANCE: according to proposed method sterilizable package deformable at compression designed for pharmaceutical product is made of multilayer foil tube including one or several layers of polypropylene and one or several layers of aluminum, and polypropylene bottle provided with cap. Bottle and cap differ in modulus of elastically. For sterilization, closed package is placed in autoclave, and temperature and pressure in autoclave are regulated as a function of time creating required pressure regulated by electronic devices controlled by computer. Pressure in autoclave is chosen to prevent deformation and breakage of package. Package, after treatment in autoclave at temperature equal to 120°C for at least 20 min, has no folds or breaks, and its compressibility remains sufficient for dispensing the product.

EFFECT: provision of package which can be sterilized in autoclave after filling.

10 cl, 6 dwg

FIELD: polymers.

SUBSTANCE: invention relates to propylene polymer-base compositions eliciting improved shock-resistance and excellent optical properties that can be used for making bottles and containers. The composition comprises from 70 to 90 wt.-% of statistic copolymer of propylene with ethylene including from 1 to 6 wt.-% of ethylene and having the content of xylene-insoluble fraction 93 wt.-%, not less, and from 10 to 30 wt.-% of copolymer of propylene with ethylene containing from 8 to 18 wt.-% of ethylene. The ratio (B)/C2B containing percent by mass (B) as measured for the total mass content of (A) and (B) to the mass percent content of ethylene (C2B) as measured for the total mass content (B) is 2.5 or less. Prepared compositions elicit optimal balance of such indices as transmittance, rigidity and shock-resistance being even at low temperatures.

EFFECT: improved and valuable properties of compositions.

7 cl, 1 tbl

FIELD: packing equipment, particularly blow-molded plastic bottles with improved bottom structures.

SUBSTANCE: polymeric bottles made of biaxially-oriented polymer, for instance of polyethylene terephthalate is formed by blowing heated bottle blank in mould under heating temperature and time control performed for blank zones defined along height thereof. This allows change of bottle wall thickness along the full bottle height and provides necessary strength in different bottle parts. Bottle bottom is composed of two intersecting spheres, wherein line of sphere intersection formed as ring defines plane of bottle contact with horizontal surface. The ring is created during bottle bottom expansion. To expand bottle annular groove with predetermined height and width is made in lower mould part. Upper groove edge is offset from mould center.

EFFECT: increased strength, stability of the bottle, possibility to create bottle adapted to store beer and heavily carbonated drinks.

6 cl, 6 dwg

FIELD: packing equipment, particularly closure means.

SUBSTANCE: cork plug 2 is produced of natural and/or synthetic material. The plug 2 has base, forming part 17 of inner bottle 6 wall, outer wall 30 adjoining inner wall 24 of the bottle neck 4. Method of plug producing involves longitudinally deforming at least part of outer plug 2 wall 30 up to base thereof during bottle 6 sealing to form at least one groove 18 in the plug; maintaining the plug in above deformed state during bottle sealing with plug 2 so that the plug 2 has the groove 18 during partial bottle unsealing.

EFFECT: increased convenience of plug usage.

12 cl, 3 dwg

FIELD: polymers, chemical technology.

SUBSTANCE: invention relates to a method for preparing co-polyester of polyethylene phthalate. This co-polyester shows diminished cracking under tension and comprises terminal carboxyl groups in the amount between 25 and 55 microequivalents per gram of indicated co-polyester, and intrinsic viscosity value at least 0.65. Method involves interaction of terephthalic acid or its ester equivalent and other carboxylic acid with ethylene glycol by the esterification reaction followed by condensation, addition of about 10-100 microequivalents per gram of indicated co-polyester of anhydride taken among the group consisting of succinic, glutaric, maleic, benzoic and phthalic anhydride to obtain polyethylene terephthalate co-polyester. Also, invention relates to polyethylene terephthalate co-polyester, preliminary shaped blank, bottle and composition. Invention provides preparing polyester that elicits the enhanced resistance against cracking under tension.

EFFECT: improved preparing method, improved properties of polyester.

14 cl, 6 tbl, 5 ex

FIELD: packing means, particularly bottles or similar containers with necks or like restricted apertures, designed for pouring contents.

SUBSTANCE: outlet assembly 3, 20 with reusable cap 20 for product distribution from container 1 has nozzle 3 with outlet end 5 provided with detachable cap 20. The cap is integrally formed with the nozzle and is used for closing outlet end 5 of nozzle 3. The cap 20 may be removed by breaking frangible connection 22 between nozzle 3 and cap 20. After cap 20 removal the outlet end 5 is opened to provide product distribution through nozzle 3. The cap 20 removed from nozzle 3 may be repeatedly connected to the nozzle 3 to close outlet end 5 and to stop product distribution from the container. The cap 20 may be connected to nozzle 3 or removed from it as often as user requires. The invention also involves package which includes tray or pouch into which the outlet assembly 3, 20 and container may be inserted. Each tray may be provided with flexible resealable peel-away closure, which allows repeatedly open and seal the tray. The resealable tray can be provided as a single tray or as a number of trays.

EFFECT: increased convenience.

48 cl, 35 dwg

FIELD: packing means, particularly bottles or similar containers with necks or like restricted apertures, designed for pouring contents.

SUBSTANCE: outlet assembly 3, 20 with reusable cap 20 for product distribution from container 1 has nozzle 3 with outlet end 5 provided with detachable cap 20. The cap is integrally formed with the nozzle and is used for closing outlet end 5 of nozzle 3. The cap 20 may be removed by breaking frangible connection 22 between nozzle 3 and cap 20. After cap 20 removal the outlet end 5 is opened to provide product distribution through nozzle 3. The cap 20 removed from nozzle 3 may be repeatedly connected to the nozzle 3 to close outlet end 5 and to stop product distribution from the container. The cap 20 may be connected to nozzle 3 or removed from it as often as user requires. The invention also involves package which includes tray or pouch into which the outlet assembly 3, 20 and container may be inserted. Each tray may be provided with flexible resealable peel-away closure, which allows repeatedly open and seal the tray. The resealable tray can be provided as a single tray or as a number of trays.

EFFECT: increased convenience.

48 cl, 35 dwg

FIELD: packing means, particularly glass containers, namely bottles for beverages, for instance alcoholic drinks.

SUBSTANCE: a bottle has a cylindrical belt formed in the upper neck part under the rim. The cylindrical belt comprises marks made as extensions or depressions and including a number of identification members arranged in a row. Identification members include manufacturer marking, digital symbols indicating the serial number of the neck ring mold set and a number of the unit mold injection.

EFFECT: reduced number of defective bottles, decreased material consumption and labor inputs for bottle production due to possibility of quick neck ring wear determination.

8 cl, 2 dwg

FIELD: metallurgy.

SUBSTANCE: invention refers to plastic package with inside surface of wall coated with diamond-like film; invention also refers to device for fabricating this package and to method of package fabricating. The device contains an electrode encompassing the package and forming one portion of a chamber for pressure fall where the package and a facing electrode located inside the package above an aperture are arranged. The said electrodes face each other and are divided with an insulating body forming portion of the pressure fall chamber. A device for source gas supply contains an inlet pipe of supplied gas. There are also a pumping out device and a device of high frequency supply. The method includes pumping out the package contents till achieving the pressure less or equal to specified, then introduction of source gas for generating plasma, termination of pumping out and decreasing the rate of introduction of the source gas to the value less than the rate of introduction at the moment of change, generating plasma for formation of diamond-like carbon film on the interior surface of the plastic package wall. Thus the package with film is produced; the said film has equal level of oxygen impenetrability; and colouring of film formed at the throat portion of the package is avoided.

EFFECT: production of package with diamond-like carbon film with uniform level of oxygen impenetrability.

25 cl, 24 dwg, 7 tbl

Up!