Method for forming restriction in open end of container and apparatus for performing the same

FIELD: plastic working of metals, namely forming portion of lowered diameter in open end of container.

SUBSTANCE: apparatus includes housing, lower die and radially unclamped guiding organ in the form of shaping members being outer and inner shaping segments. When guiding organ is in clamped state its inner segments are arranged inside outer ones. In second variant of invention each shaping segment has carrying surface for container; said carrying surface has upper cylindrical portion and inlet annular portion. In order to reduce diameter of open end of container, guiding organ is unclamped, open part of container is inserted to lower die, then guiding organ is clamped and container is removed out of lower die. Invention provides possibility for decreasing metal thickness of open end of container and also diameter of said portion.

EFFECT: enhanced efficiency of method, improved design of apparatus.

34 cl, 22 dwg, 1 tbl

 

The technical field to which the invention relates.

The present invention relates mainly to a method and apparatus for forming the necks of containers, more specifically, relates to hard decompresses the guide body to maintain internal surfaces of the team, i.e. consisting of two parts, cans of soft drinks during the operation of forming the neckline.

The level of technology

Banks, consisting of two parts or prefabricated banks are the most common type of metal containers used in the production of beer and soft drinks; they are also used for packaging of aerosols and food. They are usually formed of aluminum or tinplate. Team of the Bank consists of the first part of the cylindrical housing banks, which has a bottom wall component with case one, and second, separately formed upper part, which after filling jars with double folding joins the first portion to close the open end of the container.

Important from the point of view of the competition task is possible to reduce the overall weight banks, while maintaining its strength and characteristics in accordance with the industrial requirements. For products under pressure, such as soft drinks or beer,the cover must be made of metal, thickness is at least twice the thickness of the side walls. Accordingly, in order to reduce the overall weight of the container, cover the second part of the banks should have probably smaller diameter while maintaining the structural integrity of the container, to perform the functions of the cover, and also to give the Bank an aesthetic appearance.

Previously containers used for beer and carbonated drinks, had an outer diameter 68,3 mm (so-called "Bank-211), and the narrowing of their open side was carried out (a) to the diameter of 65.1 mm (so-called "neck-209"), and the molding cap 209 was carried out in a single operation; or (b) up to a diameter 62,7 mm (so-called "neck-207"), and the molding cap 207produced in two operations; or (b) to the diameter of 60.3 mm (so-called "neck-206")that ran for three or four operations.

In the most recent narrowing of the open end portion of the container for soft drinks were made up to a diameter of 54.0 mm (so-called "neck-202"). For forming the neck-202 is used from ten to sixteen separate sequential operations. In addition, various packing machine work with banks having different neck sizes, so it is very important that the production is tel cans had the opportunity to quickly adapt forming machines and operations to switch from one size neck on the other.

Previously, the process of narrowing the open end portion of groupage containers to bring their diameter to the diameter of the cap typically contains the operation of forming the neckline, which was consistent forming an open side with one, two, three or four sets of stamps to get a design with single, double, triple or quadruple the narrowing of the neck. Examples of such proposals are disclosed in U.S. patents 3687098, 3812896, 3983729, 3995572, 4070888 and 4519232. With regard to these patents, it should be noted that during each punching operation is formed very pronounced circular step or edge. Various market participants beer and soft drinks believed that this stepped construction is not satisfactory commercially because of the limited space for placement of labels and limits the capacity of the container.

To compensate for the loss of volume or occupancy resulting from speed, ribbed design of the container, and there have been efforts to eliminate part of the steps or ribs in the mouth of the container. Thus, in U.S. patent 4403493 disclosed method of forming neck of the container, wherein during the first operation form a cone, and then, in the second step, forming a step or an edge between the end of the conical section and a constricted cylindrical neck.

In U.S. patent 4578007 also disclosed a method of forming neck of the container for several operations with the aim of obtaining multiple edges. Profile narrowing then improve by using external forming roller to remove at least some of the edges and to get the plot in the form of a truncated cone with essentially homogeneous, jutting inward profile wall, which defines a tapering neck.

However, producers of beer and soft drinks prefer the construction which has a relatively smooth shape in the area between, for example, a filler-206 and a diameter of banks-211. The neck is so sleek designs produced by rolling the neck using the apparatus described, for example, in U.S. patents 4058998 and 4512172.

More recently, in U.S. patent 4774839 has been described apparatus for forming openings by punching and smooth conical wall between the side wall of the container and a neck of reduced diameter. The apparatus includes multiple turrets (turrets), each of which has several identical substations compression matrix for forming the neckline.

These matrices in the respective turrets have an internal configuration that is necessary to obtain the tapering part of the container. In substations forming the neckline also has a floating element pack is Alenia form or guide body, interacting with the inner surface of the container for the control section of the container on which it is supposed to form the neck. At each subsequent turrets using matrices is lapping forms a tapered section so that between the arcuate segments to get a smooth, tapered wall that does not require subsequent roller profiling.

In the General case, the guide body does not provide a carrier or guide function, starting from the moment when the edge of the banks comes in contact with the matrix, and until the edge of the banks will come into contact with floating guide body. As a consequence, possibly collapsing the edges of the banks and the formation of folds.

One of the ways of overcoming the above problems is to reduce the gap between the initial point of contact banks with the matrix and the guide body by increasing the number of stamping operations. However, this is a very expensive way, because each operation of forming the cap requires a separate station.

In addition, even when the number of operations the formation of a small folds at the open end of the jar or near it. These wrinkles are smoothed during subsequent stamping operations by holding the edge of the banks between the upper cylindrical portion of the matrix and floating the m a guiding body. These smoothed the folds form local areas that have been subjected to additional mechanical reinforcement, in the General case with more brittle than adjacent areas, and which can break down (i.e. to break or crack)when is the flared open end of the jar.

Folds becomes even greater when the thickness of the side wall of the container is reduced 0.157-0,163 to 0.127 mm to-0,137 mm to avoid their formation, it may take four to six additional forming operations the neckline. For more stamping operations, however, require additional manufacturing facilities, compressed air, electricity and time of manufacture. Thus, additional operations forming the neckline is invalid from the point of view of cost.

Despite these difficulties, the issue of a suitable container with a neck-202 of the finer material continues to be production target. To produce a container with a neck-202 while maintaining existing at the moment the number of stations forming the neckline, requires extremely careful dimensional control of the diameter of the forming matrix, and the diameter of the guide body, and the force required for insertion of the edge of the banks between the matrix and the guide body. This force strem is raised to crush the Bank or to squeeze her bottom. As a consequence, before forming the Bank has to apply pressure to 1.4-2.1 kg/cm2.

In order not to lose control over the edge of the banks, the guiding body can be given the form of the internal profile of the matrix. However, once the neck is formed, the Bank will not be removed from the guide body. Have been developed unclamping guide body during the operation of molding the cap to hold the edge of the banks in contact with the matrix, and return the guide body to the original size to extract banks.

One such apparatus is disclosed in U.S. patent 5755130. The apparatus includes a guide body containing a sleeve of elastomer and a means of allowing the lateral deformation of the sleeve. During the molding of the neck carry out a controlled deformation of the sleeve so that the lateral area of the sleeve comes into contact with the inner wall of the jar to maintain it, compressing the Bank to the transition area matrix. The purpose of such support functions elastomeric material, leaning on the wall of the jar in the process of reducing its diameter, is to prevent the formation of local folds.

Another such device is disclosed in U.S. patent 6032502. The apparatus described in this patent includes the site of a stamp containing tsilindricheskie the matrix to contact the outer surface of the container and rotating guide rollers, which support the inner diameter of the section of the container on which it is necessary to form the constriction. The disadvantage of this method lies in the fact that the support of the inner surface of the container is carried out only in areas where the roller is in contact with the inner surface.

Disclosure of inventions

To eliminate the disadvantages inherent in existing devices for shaping necks, the present invention provides a hard decompresses the guide body.

The present invention is directed to a method and apparatus for molding the neck (narrowing) of the open end portion of the container. The disclosed method allows to overcome the above difficulties by using a hard decompresses the guide body, which provides a solid surface to support the inner surface of the container during the operation of forming the neckline.

The objective of the invention is to reduce the thickness of the metal at the open end of the container while reducing the diameter of this end portion of the container. In this apparatus the traditional guide body replaced by decompresses metal guide body.

Decompresses the guide body contains a set of segments, performed individually in the movement for the formation of a solid surface. When the guide body is in the compressed position, some segments drawn inside relative to the other segments. When rasathi body during the operation of forming the neck of the mechanical parts of individual segments mate with the formation of a continuous surface. Thus, due to the absence of gaps between the individual segments of the guide body is supported around the entire circumference of the inner wall of the container. Upon completion of the operation of the molding of the neck of the guide body is transferred in a compressed position, to facilitate removal from the tool container formed with an orifice.

Radiatia guide body through hard Executive body, which automatically pushes the segments in the working position, when this is the rise of the Executive body. When the Executive body is lowered, a compression guide body due to forces applied by four springs to each respective segment of the guide body.

Other advantages and aspects of the present invention will become clear from the description, the claims and the attached drawings.

Brief description of drawings

Figure 1 shows the top view of the apparatus for molding the neck and flanging in accordance with this izopet the tion, having a modular structure.

Figure 2 is a partial section of the apparatus for forming openings in accordance with the present invention.

Figure 3 is an enlarged cut guide body and the host matrix.

Figure 4 is a perspective projection of the guiding body according to the present invention in the fully uncompressed position holder guide body not shown).

Figa is a perspective projection of the guiding body according to the present invention in a compressed position, the holder guide body not shown).

Figure 5 is a section along the plane 3-3 3.

6 is a section along the plane 4-4 3 guide body according to the present invention in a partially decompressed position.

Fig.7 is a section along the plane 4-4 3 guide body according to the present invention in the uncompressed position.

On Fig presents a view in section of the outer molding segments of the guide body according to the present invention.

Figure 9 presents a view in section of the inner molding segments of the guide body according to the present invention.

Figure 10 presents a composite view of the cut guide body in the decompressed position (left) and compressed (right).

p> 11 is a bottom view of the Executive body according to the present invention.

Fig is an enlarged partial view in section, showing the first operation of forming the neckline.

On Fig presents similar Fig, showing the completion of the first operation of forming the neckline.

Fig illustrates the beginning of the second operation of forming the neckline.

Fig illustrates the beginning of the third operation of forming the neckline.

Fig illustrates the beginning of the fourth molding of the neck.

Fig illustrates the beginning of the fifth operation of forming the neckline.

Fig illustrates the beginning of the sixth operation of forming the neckline.

Fig illustrates the beginning of the seventh operation of forming the neckline.

Fig illustrates the beginning of the eighth operation of forming the neckline.

Fig illustrates the beginning of the ninth operation of forming the neckline.

Fig illustrates the beginning of the tenth operation of forming the neckline.

The implementation of the invention

Although the present invention allows many different forms of exercise, it should be understood that the accompanying drawings and the detailed description of the preferred alternative implementation not shown, in order to limit the broad aspect of the invention, the framework presents the preferred options that should be considered only as an example of the principles of the invention.

Figure 1 presents the system 18 for forming the necks of the cans and flanging. System 18 produces containers with a smooth profile of the neck and bent outward edge.

Described below more specifically that the device 18 for forming necks and flanging includes several essentially identical modules containing station narrowing, which generally have a C-shaped arrangement. Being in the middle, one operator can visually observe and control the operation of all modules. As will be explained hereinafter, several individual modules are interconnected so as to obtain a complete system or apparatus for shaping necks and flanging.

Figure 1 shows a device 18 for forming the cap and the flange of the container 16 or cans for soft drinks. An implementation option, presented in figure 1, contains modules 22, 24, 26, 28, 30, 32, 34, 36, 38 and 40 stations narrowing module 42 station flanging. Not overstepping the bounds of the inventive concept, the apparatus 18 can add additional stations narrowing. Gear wheel 21, 23, 25, 27, 29, 31, 33a, 33b, 33C, 35, 37, 39, 41 and 43 in series, on a serpentine trajectory move the container 16 through the various stations narrowing.

All modules 22, 24, 26, 28, 30, 32, 34, 36, 38 and 40 stations narrowing are essentially identical construction to ensure interchangeability, add the system and remove it depending on, what type of container should be formed. Each of the station modules narrowing has several located around the circumference, the individual, is essentially identical to substations (figure 2) narrowing. The number of stations and substations can be increased or decreased to provide the desired molding cap for containers of different sizes. More substations are described below.

An additional advantage of using essentially identical modules is that many components of these modules have the same design, which enables to reduce the range of parts.

Further, figure 1 shows a housing 16 of a cylindrical metal containers, which are made from traditional materials by any standard method, and successively served in the device 18 for forming necks and flanging by means of suitable conveyor means (not shown). Conveyor means serving containers 16 on the first transmitting wheel 21, as in known devices. Then the containers 16 are sequentially fed through the modules contracted by the connecting transmission wheels.

More specifically, the first transmitting wheel 21 delivers the containers in the first narrowing module, generally designated by the number 22, which is above the container 16 is performed the first operation of forming the cap, as described below. Then the containers 6 are served by the second transmitting wheel 23, which delivers the containers 16 in the second module 24 narrowing where the container 16 is performed the second operation of forming the neckline. Then the container is removed from the second module via the third transmitting wheel 25 and is served in the third module 26, where the third operation of the molding of the neck.

Then the containers 16 are alternately move through subsequent modules 28, 30, 32, 34, 36, 38 and 40 to complete the molding of the neck. Then the containers formed with an orifice through the transmission wheel 41 is passed into the module 42 flanging, where, as in known devices, the contour edges of the container to the outside. After that, the containers are fed to the transmitting wheel 43 for transmission to the output pipeline.

As will be explained in more detail below, each station simultaneously processes, or makes, a few containers 16, with each container 16, as it is processed and its promotion from input module constriction at the output, becomes the mouth of varying degrees of sfarmanali.

All movable elements of the apparatus 18 for forming the neckline and flanging are driven by a single actuator 44, which includes a motor with adjustable speed, connected to the output of the transmission 46. Each of the transmitting wheels, as well as modules for narrowing module flanging contain in Zats is building with each other gears, that ensures a continuous drive of all components.

The function of regulating the number of revolutions of the drive 44 gives the possibility of adjusting the speed of the modular apparatus. Drive with adjustable speed also enables the operator to accurately position the components of the system relative to each other.

The device 18 for forming the cap and the flange includes a vacuum means associated with each of the modules, and operating on each of the transmitting wheel, so that the containers 16 remained in the conveyor path. To support the rotary turret 70, which are part of the modules provided by the supporting frame 50, which connects the modules to each other.

Figure 2 presents a partial view of the module narrowing. Each module included in the apparatus for molding the cap includes a stationary frame 50 and the node 70 rotary turret which is mounted on the frame for rotation and carries several identical substations 72 narrowing located on the periphery of the site. Node 70 of the turret is held in a stationary frame for rotation by upper bearings 73 and lower bearings (not shown).

The lower portion 74 of the turret and the upper portion 76 is installed on the rotating shaft 78 of the actuator. The upper portion 76 of the turret mounted for sliding in the axial direction is on the shaft 78 of the actuator and is connected with the bottom part 74 of the turret so that can rotate together with it at the expense of the finger 80, which passes through a bushing 82 mounted on the lower frame of the turret.

Space 84 of the lift container mounted on the rod or the piston, which is installed with the possibility to perform a reciprocating motion in the cylinder 88, attached to the bottom part 74 of the turret. The lower end of the rod is equipped with a Cam follower, which runs onto the Cam for raising or lowering the rod and pad 84 of the lift. Thus, the space 84 of the lift moves the container or jar 16 in the direction of the top of the turret or from it.

Figure 3 in more detail shows the upper part of the substation 72 narrowing. Substation 72 includes an upper forming or narrowing portion 102.

Top narrowing portion 102 contains floating matrix 130 narrowing, which is fixed in the holder 132 by means of a threaded tip 134. The holder has a Central axis 135. In the holder 132 has an axial hole, which has a hollow Executive body or shaft 137 with the possibility of reciprocating motion. The plunger 138 of the Cam is mounted on the upper end of the Executive body 137, and when the rotation rests on an open flat surface of the Cam 139 to the upper end a work circuit, which is fixed to the frame.

The Executive body of the plunger 137 and 138 of the Cam supported to the ntaka with the Cam 139 through a dual mechanism preload to the operating profile of the Cam, which also centers the Executive body 137 in the above-mentioned hole. The lower end of the Executive body 137 is used to control radiation and compression of the management body or the guide body 140, described in more detail in the future. During the molding of the neck of the container 16 may be provided by compressed air through the Executive body 137 and the guide body 140.

According to figure 4 and 4A, and figure 2, 3 and 5-7 guide body 140 in accordance with the present invention in the General case contains four forming segment 150a-d, which is installed with the possibility of controlled relative radial movement within the holder 132 of the guide body. Forming segments 150a-d in the General case, made of durable, rigid material such as tool steel. To improve the surface properties on the forming segments 150a-d may be applied to additional coverage. Bias shift elements forming segments 150a-d inside in a compressed position. Bias elements generally represent the spring elements 152a-d, but the offset may also be performed by means of elastic elements, air pressure and so on (see figure 10). The first pair forming segments 150a, b retracts into the second pair of forming elements 150C, d (see Fig.6). The first pair of forming segment is s 150a, b has a smaller surface area in comparison with the second pair forming segments 150C, d.

Each forming a segment 150a-d has an outer surface 154 a certain area and the inner surface 158. The outer surface 154 includes a bearing surface 162 of the container, a pair of guides 166a, b, and the sliding plate 170 that is located between the guide 166a, b. The combination of the two guides 166a, b and plate 170 prevents the rotation of the forming segments 150a-d inside of the holder 132 guide body.

Bearing surface 162 of the container in the General case follows the curvature of the open end of the container. Bearing surface 162 includes an upper cylindrical section 173 located from the Central axis 135 at the first radial distance R1and passing through a transitional arcuate area in the annular arcuate convex inlet pipe 174, located on the second radial distance R2from the Central axis 135. The convex curvature of the inlet pipe 174 in General equal to the curvature upstream of the narrowing of the matrix 130. This site interacts with the matrix during the execution of another processing operation of the upper part of the container 16 when forming his neck. Convex inlet section 174 also forms a guide for the open end of the container. This convex in the Astok 174 prevents the addition of the open side of the container and the formation of folds, when the container is pressed into the matrix 130. This section 174 has a lower beveled portion for centering the container and a straight portion to the container. This provides the ability to optimally control the fluidity of the metal in the molding process, and also to get a larger gap between the matrix 130 and the expansion guide body 140.

According pig and 9 the inner surface 158 of each mold segment 150a-d includes an inclined step 178a-d. Each forming a segment 150a-d includes an inclined step 178a-d, with sloping steps a, 178b first pair of lower forming segments are longer and are located at a relatively greater height compared to the height and length of inclined steps s, 178d of the second pair forming large segments. The purpose of such features will become clear from the further description.

The Executive body 137 passes through the holder 132 and selectively comes in contact with the inner surface 158 of each mold segment 150A-d. The Executive body 137 has a through hole 168 for supplying air pressure in the inner cavity of the container.

According to figure 10 and 11 Executive body 137 has a near end 184 and the far end 186. The far end 186 is the working end of the Executive body 137. The far end 186 includes inclined at ASDI 188a-d, which are in contact and interact with inclined steps 178a-d forming segments 150a-d. Ramps 188a-d separated by gaps 189 to prevent unnecessarily dense preload forming segments 150a-d to each other. Therefore, the far end 186 acts like a set of flexible beams separated sazanami.

When the Executive authority 137 moves upward sloping plots 188c, d pushing the second pair forming segments 150c, d outward relative to the Central axis 135 to overcome the force generated by springs 152c, d. With the further rise of the Executive body 137 ramps a, b push the first pair forming segments 150A, b outward to overcome the force generated by springs 152a, b.

In the fully extended position forming four segments 150a-d are flush with each other in areas 192 peripheral edges. Forming segments 150a-d are adjacent to each other in such a way that between them is either very small transition gap, or no gap. When the segments 150a-d are fully extended, and sections 192 peripheral edges of neighboring segments 150a-d are in contact with each other, the adjacent support surface 162 of the container form a continuous circular forming surface 193 (see figure 4). The reduction or complete elimination of the gaps between the molding segment is mi 150a-d prevents the formation of traces or deformation of the metal, caused by the penetration of metal cans in the gaps in the molding process of the neck.

According to 11 slots 189 in the Executive body 137 constrain unnecessarily dense line forming segments. When reaching the preset value of effort, which from the far end 186 of the Executive body 137 is applied to the forming segments 150a-d, ramps a-d far end 186 bent inward to prevent excessively thick line plots 192 peripheral edges.

Matrix 130 is mounted with a small clearance. Matrix 130 is installed with the possibility of some movement or "floating" inside the holder 132. Thus, in the molding process of the neck of the matrix 130 is centered relative to the open end of the container. In a known apparatus for forming necks matrix 130 is fixed stationary, while the guide body 140 sets with the ability to "swim".

According to figure 2 and 3 when the module shaft 78 is driven into rotation around a fixed axis on the fixed frame 50. While the container 16 moves upward in the matrix 130, the shaft 78 is rotated, whereupon the open end of the container undergoes gradual transformation. About that time, when the upper edge of the container will include the Facebook, with matrix 130, in the container through the opening 141 from any source serves compressed air. When the node 70 of the turret will rotate approximately 120°upper Cam 139 will move the Executive body 137 up to the implementation gunzip guide body 140 in the outer direction in the matrix 130.

As mentioned previously, the Executive body 137 is shifted downwards, and when the rotation site turret will move up into the position shown in figure 3. Then, during the remaining part of the total turnover on the 360°, the Cam 139 will return pad 120 in the lower position, and the guide body 140 will return in a compressed position, the speed of execution of these actions will be essentially consistent. At the same time, the container 16 with moulded neck will be extracted from the matrix 130. During this downward movement, the compressed air in the container will push the container from the die 130 to the platform 120.

The containers 16 are continuously fed into the space 120, treated and disposed, as shown in figure 1.

In the present invention proposes a method capable of forming a neck of a container with a hole of reduced diameter through the use of a number of modules narrowing. The advantage of this method is to reduce the crushing of metal and/or wrinkling, as well as reducing the thickness of the metal is achieved workpiece, used to form the body of the container. In the embodiment of the invention shown in figure 1, on the neck of the container are multistage operations forming the neckline and one operation of flanging. During each operation of the molding cap is an increase in the length of the neck or constricted inside section of the container in the form of a cone.

For each operation forming the neckline is processed by some section of the cone to increase its length. The narrowing of the diameter is performed on small segments, so that in a multistage operations we obtain a smooth, finished area of the neck. The resulting plot of the neck at the end of the cylindrical wall has a rounded ledge, through the arcuate section is mated with the annular segment direct conical narrowing. The opposite side of the ring straight segment through the second arcuate section mates with the cylindrical neck of reduced diameter.

The operation of molding the cap hereinafter described with reference to Fig-22. In this embodiment of the invention on an aluminum container "211" ten operations is formed neck "202". Assume that the container 16 is conveyed, as shown in figure 1, is moved to the position shown in figure 2,and starts the operation of forming the neckline. On Fig-22 shows the operations performed in ten modules narrowing; however, it can be used sixteen or more modules.

Test was performed, in which the guide body 140 according to the present invention inserted into the hand press has been transformed into a forming station of the neck, and the design press imitated the fourth operation of forming the neckline. It is known that on this fourth stage products are particularly prone to wrinkling.

The size guide body 140 were selected in accordance with the size of the matrix employed in the fourth stage; however, it was assumed that the container is a standard container for soft drinks, with an initial thickness lacquered walls in its upper part, equal 0,167 mm After the third stage, the wall thickness of the container in its upper part on the results of the measurements was 0,173-0,176 mm

The diameter of the protrusion 174 of the guide body was equal to the inner diameter of the neck of the container at the end of the third stage of the apparatus for forming necks.

The radius of the entrance part of the guide body 140 has been selected arbitrarily. Subsequent tests showed that the range of the input part can be set so that it matches the natural bend radius of the container wall at the top of his frequent is, which it comes into contact with the matrix 130.

The corners at the intersection of the peripheral edge segments 150a-d were severe as to eliminate any gap between them when fully decompressed guide body 140.

Tests were performed to determine the proper air pressure and time compressed air for forming neck of the container with a standard thickness (168 µm) wall in the upper part. Insufficient air pressure caused the collapsing of a large number of containers, while untimely application of air pressure tore the containers from the matrix before the guide body was transferred to a compressed position, and the container was left without a formed neck.

Was established the following procedure and controlled press. The containers were placed in the apparatus. Provided the supply of air under pressure in the container. Then produced the forming neck of the container under pressure. As soon as the shaping of the container has been completed, the air pressure was removed. Then, after the translation of the guide body in a compressed position, again gave compressed air to eject the container.

The test results are brought together. Several containers were crushed when the air pressure of 3 bar or less. Except for these few cm is mentioned containers on any of the containers are not formed of folds. Containers that have not been crushed and was without folds, were obtained by increasing the pressure above 3 bar and the increase in time-keeping container under pressure before molding.

The test was repeated with containers having a wall thickness in the upper part, equal to 138 μm. The air pressure was reduced to 3 bar and below with the same snap. Narrowing all containers successfully.

The test results are summarized in table 1.

Table 1
Lacquered containersLacquered containers
The number of containers3030
The wall thickness in the upper part of the container173-176 mcm138 mcm
The number of correctly objetych containers2730
The number of containers with folds00
The number of folded containers30

The method proposed in the present invention are less sensitive to strict tolerances than traditional molding necks with the help of matrices. In conventional apparatus for forming the required tight tolerances to form the neck, before RA the ICS container reaches a radius of the outlet part of the matrix and will be partly more of the radius of the outlet part of the matrix, when the mouth is formed. If there camshaft guide body diameter output side of the matrix and the punch is not necessarily associated with close tolerances, since the compression during the molding of the neck is forming segments when the diameter of the guide body in the decompressed state. So, when the wall thickness in the upper part of the container from 176 μm to 138 μm is obtained an additional 35-micron gap.

Although the present invention is described in the specific example of the preferred option, it is clear that in the form and details of the invention can be modified, not beyond the limits of ideas and scope of the invention, which is installed in the accompanying formula.

1. Apparatus for reducing the diameter of the open end portion of the container, comprising a housing held in the housing around its axis matrix and radial decompresses the guide body, held in the enclosure with the possibility of selective transition from a compressed position relative to the axis of the housing in the decompressed position, and comprising forming elements, characterized in that the forming elements represent the outer and inner molding segments made of conditions ensure the location of the inner molding segments inside the outer molding segments in the translation direction is shining body in a compressed position.

2. The apparatus according to claim 2, characterized in that each forming a segment is made with the outer surface and the area of the peripheral edge is made with the possibility of placement in contact with a section of the peripheral edge adjacent the forming segment.

3. The apparatus according to claim 1, characterized in that the inner molding segments performed with the outer surface has an area smaller than the area of the outer surface of the outer molding segments.

4. The apparatus according to claim 1, characterized in that each of the inner and outer forming segment made with the possibility of bias in the compressed position of the guide body by means of the bias element is held inside the case.

5. The apparatus according to claim 4, wherein the bias element is designed as a spring.

6. The apparatus according to claim 4, characterized in that it has Executive authority for application to each of the inner and outer forming segment outward commitment to translate radially decompresses the guide body from a compressed position in the decompressed position.

7. The apparatus according to claim 6, characterized in that the actuator is made of the conditions of the application to each of the inner and outer forming segment efforts to ensure that the movement of internal and external forming segments outward in a pre determined the order of priority.

8. The apparatus according to claim 7, characterized in that each of the outer molding segments performed with the first inner surface with a first inclined wall located at a first height along the length of the first inner surface, and each of the inner molding segments performed with the second inner surface with a second inclined wall located at a second height along the length of the second inner surface, and the value of the specified first height is greater than the value of the second height, and the actuator is made of the conditions for entering into contact with the first inclined walls forming the outer segments to move with the force of the external forming segments outside before coming into contact specified Executive body with the second inclined walls of the inner molding segments to ensure the outward extension of the outer molding segments previously outward extension of the inner molding segments.

9. The apparatus according to claim 1, characterized in that it contains an Executive body, is made with the possibility of axial movement within the housing, entering into contact with the radially decompresses the guide body and the application to radial decompresses the guiding body of a commitment to move the forming elements to the outside in the radial direction relative to the axis to the pus.

10. The apparatus according to claim 9, characterized in that it is provided with means to prevent excess force to ensure the movement of the forming elements to the outside in the radial direction relative to the body axis specified value.

11. The apparatus according to claim 9, characterized in that the actuator is made with near and far ends, the latter of which has a series of inclined sections for contact engagement with the inner wall of each of the forming elements, and is installed with the possibility of axial movement up to move with force mentioned ramps forming elements in the radial direction outwards.

12. The apparatus according to claim 11, characterized in that the inclined sections of the far end of the Executive body are arranged with a gap between them and configured to bend inwards in case of exceeding the force applied to the inner walls forming elements specified value.

13. The apparatus according to item 12, wherein the actuator is made with a Central hole for supplying hydrostatic pressure in the inner portion of the container.

14. The apparatus according to claim 1, characterized in that the forming element is made with the outer surface of the first block located at the first radial distance relative to the axis, and a second section, located n the second radial distance relative to the axis, and the value of the specified second radial distance is greater than the value of the first radial distance.

15. The apparatus according to 14, characterized in that the first area of the outer surface of each forming element associated with the second area via the arcuate transition zone.

16. The apparatus of clause 15, wherein the second section of the outer surface of each forming element is designed with a protruding outward arcuate ledge.

17. The apparatus according to clause 16, wherein the arcuate protrusion is located near the entrance of the guide body.

18. The apparatus according to 17, characterized in that the matrix is made with the lower conical part, and the arcuate protrusion is made with a curvature which approximates the curvature of the mentioned lower conical part of the matrix.

19. The apparatus according to claim 1, characterized in that the radially decompresses the guide body made of rigid material.

20. Apparatus for reducing the diameter of the open end portion of the container, comprising a housing held in the housing around its axis matrix and rigid radially decompresses the guide body, held in the enclosure with the possibility of selective transition from a compressed position relative to the axis of the housing in the decompressed position, and comprising forming elements, wherein ormosia elements represent the outer and inner molding segments, made of conditions ensure the location of the inner molding segments inside the outer case of selective translation of the guide body in a compressed position, and each of the forming segments has a bearing surface for a container with a cylindrical upper section located at a first radial distance from the axis, and an annular inlet pipe located at a second radial distance from the axis.

21. The apparatus according to claim 20, characterized in that the value of the second radial distance is greater than the value of the first radial distance.

22. The apparatus according to claim 20, characterized in that the annular inlet area of the bearing surface for the container, each forming a segment made from protruding outward arcuate side wall.

23. The apparatus according to item 22, wherein the arcuate side wall of the annular inlet pipe made protruding outward relative to the body axis.

24. The apparatus according to item 23, wherein each forming element is made with the outer surface and the area of the peripheral edge for selective entry into the contact area of the peripheral edge adjacent the forming element.

25. The apparatus according to paragraph 24, wherein the inner molding segments performed with the outer surface has an area smaller than the area of the outer poverhnostyah forming segments.

26. Apparatus according A.25, wherein each of the inner and outer forming segment is executed with a possibility of displacement in a compressed position by a bias element held inside the case.

27. The apparatus according to p, wherein the bias element is designed as a spring.

28. The apparatus according to p, characterized in that it contains the Executive body for application to each of the inner and outer forming segment outward efforts to translate radially hard decompresses the guide body from a compressed position in the decompressed position.

29. The apparatus according to p, characterized in that the actuator is made of the conditions of the application to each of the inner and outer forming segment outward efforts to ensure that the movement of internal and external forming segments outward in a predetermined order of priority.

30. The apparatus according to clause 29, wherein each of the outer molding segments performed with the first inner surface with a first inclined wall located at a first height along the length of the first inner surface, and each of the inner molding segments performed with the second inner surface with a second inclined wall located at a second height along the length of the second inner surface, and elicina specified first height is greater than the value of the second height, and the actuator is made of the conditions for entering into contact with the first inclined walls forming the outer segments to move with the force of the external forming segments outside before coming into contact specified Executive body, with the second inclined walls of the inner molding segments to ensure the outward extension of the outer molding segments previously outward extension of the inner molding segments.

31. A method of reducing the diameter of the open end portion of the container, including radiatia held in the housing radially decompresses the guide body in the form of a forming elements made with the possibility of selective transition from a compressed relative to the longitudinal axis of the provisions in the decompressed position, the introduction of the open end portion of the container in contact with the matrix held in the housing, the introduction of the container with a force in a matrix compression mentioned radially decompresses the guide body and the removal of the container from the matrix, characterized in that the forming elements use a pair of inner and a pair of external forming segments, each of which has an outer surface and a section of the peripheral edge for selective entry in the contact area of the peripheral edge adjacent the forming segment, with domestic f is mousie segments have outer surface of smaller area, than the area of the outer surface of the outer molding segments, and is made of conditions for placement within the outer forming elements at selective transfer decompresses the guide body in a compressed position.

32. The method according to p, characterized in that radiatia radially decompresses the guide body is carried out by application thereto outward in the radial direction of the efforts from the Executive body, which is a through hole.

33. The method according to p, characterized in that in the inner portion of the container before putting it firmly into the matrix through a through hole of the Executive body serves hydrostatic pressure from a source of hydrostatic pressure.

34. The method according to p, characterized in that when rasathi radially decompresses the guide body forming elements open in a predetermined order of priority.



 

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