Extruder's forming head

FIELD: the invention refers to equipment for extrusion processing of mixed fodder on mixed fodder plants and also for production of extrusion food products in different fields of food industry.

SUBSTANCE: the extruder's forming head has a body, a flange connected to it, a calibrating matrix, a shaft connected with a screw and a knife. A chamber with sockets for removal water steams and unloading ready product is fastened to a matrix. Inside the chamber there is a perforated conical drum. Vertical holders are installed on the shaft. On the spherical ends of the vertical holders there are fixed sectional strings. The strings are fulfilled with possibility of turning them relatively to the shaft with following fixation with bolts for measuring of a lead angle. On the external surface of the strings there are longitudinal notches.

EFFECT: reduces power inputs on production of well-milled extruders.

4 dwg

 

The invention relates to equipment for extrusion processing of animal feed at feed mills, as well as for the production of extruded food products in various sectors of the food industry.

Closest to the technical essence and the achieved effect is the extruder for the production of moulded articles with an adjustable cross section forming a channel, comprising a housing connected therewith forming a flange, screw and calibrating the matrix [a. C. the USSR № 716851, CL229 F 3/04, 25.02.80. Bull. No. 7].

A disadvantage of the known design of the extruder is the need to use additional equipment for crushing and sieving feed and, as a consequence, the increase of the specific energy consumption for production.

An object of the invention is the design of the extruder, allowing to perform the operation of grinding and sieving the product.

This object is achieved in that in forming the cylinder of the extruder, comprising a housing connected therewith flange, calibration matrix, a shaft connected with the auger, knife, what's new is that attached to the matrix camera with nozzles for removal of water vapor and unloading of finished product, within which is mounted a perforated conical drum, a shaft installed verticalheaderitem, on the spherical ends of which are fixed split whips made with the possibility of turning them relative to the shaft with subsequent fixation bolts to change the firing angle, and on the outer surface of the vanes caused longitudinal notches.

1 shows a longitudinal section of the forming dies, figure 2 - cross section A-a in figure 1, figure 3 - three-dimensional image of the shaft, the brackets and whips, figure 4 is a cross section of the holder.

Die head of the extruder (1, 2, 3), connected with the housing 13 and the screw 12, contains a flange 2, the matrix 1 and the chamber 7 in which is located a perforated conical drum 3. In the matrix 1 with holes 11.

Inside the drum 3 has a shaft 4 connected to the auger 12. On the shaft 4 has a knife 10 and the vertical brackets 5, which are split vanes 6, made with the possibility of rotation relative to the shaft and then secured by bolts to change the firing angle. The vanes 6 are composed of two parts: the outer 16 and inner 17, which are interconnected by screws 18. On the surface of the outer part 16 of the vanes 6 applied longitudinal notches along their entire length.

Vertical holder 5 (figure 4) is a cylindrical rod, one end of which is threaded for screwing it into the hub 15 that is located on the shaft 4. On the other is the end of the holder 5 machined ball bearing. The vanes 6 are two cylindrical channel 19, in which are placed the ball bearings of the brackets 5. To adjust the position of the ball holder 5 in the channel 19 in the side in place of articulation of the outer 16 and inner 17 parts of vanes mounted sleeve 22 with internal thread. Into the sleeve 22 is screwed to the bolt 21, which provides movement of the ball joint in the channel 19. On the opposite side of the channel 19 has a latch 23 on which is mounted a spring 20. The spring 20 with the other end enters the hole 24 in the ball socket of the holder 5. Each beach 6 has two cylindrical channel 19: channel one (with respect to the die of the extruder) bolt 21 and nut 22 are located on the front of the beach, and the latch 23 and the spring 20 on the rear of the beach, the second channel they are on the opposite side (figure 3).

Thus, by moving the ball bearings of the brackets 5 by means of oppositely spaced bolts 21 adjusts the firing angle. This is necessary to ensure better grip extruded rods and grinding in the gap between the grooved surface of the vanes 6 and the perforated surface of the drum 3.

The lower part of the perforated conical drum 3 that is installed inside the chamber 7, is connected to the collector 8, the bottom of which has a nozzle 9 for removal of the crushed extrudate. At covoy part of the chamber 7 has an inlet 14 for connection with a vacuum pump to maintain the vacuum and ensure the removal of water vapor formed during the blasting of the extrudate at the exit from the matrix.

The proposed extruder operates as follows.

First, you need to set the predetermined advance angle of the vanes 6 to provide better grip extruded rods and grinding in the gap between the grooved surface of the vanes 6 and the perforated surface of the drum 3. The firing angle of the vanes is determined depending on the diameter of the resulting extruded pellets and varies in the range 2...8°(angle α figure 3). To do this, adjust the position of the ball bearing holder 5 in the channels 19 through svorachivaniya bolts 21 in the sleeve 22, while moving the ball joints front and rear holders in the channels 19. The presence of the opposite side of the channel 19 of the retainer 23 and the spring 20 allows to damp excessive load and to avoid breakage of the vanes 6. Due to the fact that every beach 6 has two cylindrical channel 19, then, moving by means of bolts 21 ball bearings in opposite directions, adjust the firing angle.

Then enable the drive of the extruder, resulting in the rotation of the screw 12 and the shaft 4, and therefore, the knife 10 and the vanes 6. The original product with a given humidity through the loading pipe enters into the working chamber, where it is moved by a screw 12 to the matrix 1.

As the promotion of the product in the mixing zone is partially mixed in the compression zone is abrupt is Velicina pressure and the seal of the product due to a sharp decrease in the size of the screw channel. In the area of plasticization is a partial transformation of the granules of the product in the melt due to the friction between the particles of the product and the turns of the screw.

Then there is the further compression of the product. Further in the area of homogenization is turning softened granules into a homogeneous melt due to the increasing pressure. The pressure of the molten product in the batching area reaches the desired value, thus providing a final melting of small inclusions and forms a melt of uniform composition and temperature. This allows for normal operation of the extruder to have a defined, uniform in cross-section of the melt temperature of the product.

In the stabilizing zone is balanced pressure and temperature fields of the melt product. Then he gets into pragmatico zone and is forced through the outlet openings 11 in the matrix 1.

After the product is released from the matrix in the sudden drop of temperature and pressure is instantaneous evaporation of moisture, accumulated product of the energy is released at a speed approximately equal to the velocity of the explosion, which leads to the formation of the porous structure and the increase in the volume of extrudate (heaving). In the "explosion" of the product (or "decompression shock") is undergoing a profound transformation of its structure: cell gap CTE is OK degradation, hydrolysis [Thermoplastic extrusion: scientific fundamentals, technology, equipment, / / Under. edit Anegative, Vperedi. - M.: Degree, 1994. - 200 S.]. Formed by blasting the extrudate water vapor are removed through pipe 14, which is connected to the vacuum pump.

Coming out of the holes 11 extruded sticks are cut by the knife 10 and fall inside the perforated drum 3, where they are captured by the rotating vanes 6, pressed to the surface of the perforated drum 3, are crushed and after reaching a certain diameter are sifted through the perforated drum 3 and into the chamber 7. From the bottom of the collector 8 through pipe 9 is drained crushed extrudate.

Thus, the use of the invention will:

to obtain extruded texturates for use as protein supplements in the production of bakery products, cooked sausages, animal feed, etc.;

to reduce the specific energy consumption for the production of crushed extrudates due to offer a combined structure.

Die head of the extruder, comprising a housing connected therewith flange, calibration matrix, a shaft connected with the auger, knife, characterized in that the matrix is attached camera with nozzles for removal of water vapor and unloading goth the new product, within which is mounted a perforated conical drum, a shaft installed vertical holders, on the spherical ends of which are fixed split whips made with the possibility of turning them relative to the shaft with subsequent fixation bolts to change the firing angle, and on the outer surface of the vanes caused longitudinal notches.



 

Same patents:

Extruder // 2314918

FIELD: food industry; other industries; production of the devices for the extrusive treatment of the foodstuffs.

SUBSTANCE: the invention is pertaining to the devices used for extrusive treatment of the foodstuffs and may be used for production of the extruded foodstuffs, and also in other branches of industry applying extrusion. The extruder contains the body, the molding head, the feed screw, the distributor and the tubes for inlet of the prescription components. The distributor is installed in the molding head and divides it into the independent from each other parallel zones. At the inlet into each zone there are the mounted lattices with the tubes for injection of the prescription components. The outlet holes of the tubes are directed towards the motion of the extrudate melt. In each of the zones there are the stationary vortex generators of the stream. On the outlet of each zone there are the mounted spinnerets of the different configuration. The invention allows to dilate the technological capabilities of the extruder, to reduce the costs of its operation.

EFFECT: the invention ensures expansion of the technological capabilities of the extruder, reduction of the costs of its operation.

3 dwg

FIELD: food-processing industry, in particular, technique for extrusion forming of swollen cereal products shaped as tubes or food cushions with filler by coextrusion process.

SUBSTANCE: apparatus has discharge die provided with accumulating chamber, and extrusion device for pressing out of extrudate, separating die positioned in front of discharge die and joined to the latter by means of receptacle surfaces, injector fixed in separating die in radially offset relation with respect to apparatus axis, and filler feeding channel communicating with injector. Separating die has axial receptacle core located in front part of said die and extending through axial opening provided in discharge die. Accumulating chamber and extrusion devices are positioned in axially aligned relation with respect to injector. Feeding channel is formed within receptacle core of discharge die and is communicating with ejector through radial surrounding channel formed in separating die. On rear end part of discharge die there are bypass slot extending along arc of a circle, and connection slot extending along chord running perpendicular to axis of accumulating chamber and extrusion device. Bypass and connection slots are communicating with one another, accumulating chamber and extrusion device.

EFFECT: increased strength of wall of tube-shaped food product allowing pressing out of filler through said wall to be avoided.

8 cl, 3 dwg

Extruder // 2299124

FIELD: extrusion equipment; production of extruded food-staff in food-processing industries.

SUBSTANCE: proposed extruder has housing, screw feeder with drive and molding head with tip and taper core. Taper core is provided with shaft. Taper core is sectionalized. It consists of two parts; each part may be regulated in direction and rotational speed by means of coaxial shafts and reduction gear. One shaft is solid and is located inside hollow shaft. Tip performs reciprocating motion along extruder axis by means of rack mechanism and splines found on inner surface of tip where guides rigidly connected with surface of outlet end of extruder body are located. Shape of guides on extruder body copies shape of splines on tip and guides are received by splined slots of tip. Gear wheel of rack mechanism rigidly secured on its shaft is thrown into engagement with rack rigidly secured to tip. Taper angles of inner part of tip and taper core are so selected that clearance in between them has form of taper circular passage. Outer surface of last part of core and inner surface of taper part of tip are knurled for obtaining the required shape of product. Extruded product does not require further grinding.

EFFECT: improved quality of finished product.

1 dwg

FIELD: chemical industry; molding devices for production of the plastic pipes.

SUBSTANCE: the invention represents the molding device having the molding ducted work tool making the reciprocating movement and capable to mold the products of the various configuration. The molding device contains the movable molding ducted work tool formed by the molding block arranged behind on the trajectory of molding and at least by one molding block arranged ahead on the trajectory of molding, which both are moving backward and forward on the indicated trajectory. The indicated device also has the extrusion die with at least one channel for the flow of the plastics material, which in turn having the outlet opening, through which the plastics material moves into the molding ducted work tool. The molding block arranged behind on the trajectory of molding has the first and second zones of the molding of the product. At the first stage of the molding in the molding device the indicated first zone is arranged so, that to provide the feeding of the plastics of the plastics materials into it from the outlet opening of the indicated channel, and the indicated second zone remains behind of this opening on the trajectory of molding and molding of the continuous sections of the pipe having corrugations. At the second stage of the molding both indicated zones of the molding block are arranged behind on the trajectory of the molding, the first and the second zones are arranged so, that to provide feeding into the of the plastics materials with the purpose to change the shape of the cross-section of the pipe. The molding block arranged ahead on the trajectory of the molding has the zones of molding of the product intended for reception of the product molded in both indicated zones of the molding block arranged behind on the first and second trajectories of molding.

EFFECT: the invention ensures, that the molding device with the molding ducted work tool making the reciprocating movement is capable to mold the products of the various configurations.

9 cl, 12 dwg

FIELD: chemical industry; methods and devices of molding of the thermoplastic polymeric materials.

SUBSTANCE: the invention is pertaining to the method and the device of molding of the thermoplastic polymeric material and its composition. The engineering solution of the invention concerns to polymers melt molding, mainly to the polymers melt molding by extrusion, and especially to the extrusion of polyolefins, in particular, polyethylene and may be used at manufacture of a polymeric profile, an insulating coating for an electric cable, a polymeric fiber, a polymeric pipe and a polymer film produced by a pipe ballooning. The technical result of the invention is an increase of the speed of the defect-free extrusion. In the process of the polymeric compounds melts molding onto the surface of the molding device being in contact with the melt of the polymeric compound superimpose a flexible coating. The method of the thermoplastic polymeric material molding provides for extrusion of the melt of the thermoplastic polymeric material with the additives of elastomers through the device for extrusion, deposition in the process of the extrusion of a flexible coating at least onto the sections of the being in contact with the melt surface adjoining to the outlet of the device and having the length of no less than 10 % of the clearance space for the polymeric material molding. Predominantly the flexible coating is superimposed by depositing the additives from the polymeric material melt on the indicated surface. In the capacity of the material for a flexible coating select the thermoplastic elastomers, which are more resilient as compared with a polymeric material melt, or the elastomers gaining resilience in the result of the vulcanization. In the latter case conduct a dynamic vulcanization of the layer of the elastomer in the process of the extrusion. The device for extrusion of a thermoplastic polymeric material with a flexible coating superimposed in the process of the thermoplastic polymeric material extrusion at least on the part of that surface of the device, which is intended to contact with the melt of the thermoplastic polymeric material, contains a catalyst for the corresponding reaction of vulcanization of the elastomers. The composition used for the thermoplastic polymeric material molding and for simultaneous deposition of the flexible coating on the device surface, which is intended to contact the melt containing polyolefins and the additives of elastomers is characterized by the fact, that in the capacity of the elastomers use the block copolymers of the rigid polymers (A) with the glass transition temperature exceeding the room temperature, but being below the temperature of the indicated polyolefins molding and the soft polymers (B) with the glass transition temperature below the room temperature. At that select the block copolymers with the structure of the linear block copolymer A(BA)n , where n>0, or (BA)m , where m>1, or the graft copolymer, when at least two side segments of a rigid polymer are grafted to the soft polymer at the following components ratio: the thermoplastic elastomers - 0.001-10 mass %; the thermoplastic polymeric material - the rest. The particular cases of realization of the offered engineering solution characterize the material for the coatings and the extrusion, the requirements for realization of the method and the engineering components of the device for the thermoplastic material molding.

EFFECT: the invention ensures an increased speed of the defect-free extrusion.

18 cl, 12 dwg, 2 tbl, 7 ex

FIELD: chemical industry; equipment for production of polymeric constructional materials.

SUBSTANCE: the invention is pertaining to devices for production of polymeric constructional materials, in particular, to production of a two-channel extrusion head for manufacture of the polymeric constructional platbands and may be used in chemical industry for production of polymeric constructional platbands. The extrusion head contains a sectional body and a located in it insert with channels for chilling, which form between themselves a molding slit of a profile cross-section. The molding slit consists of two molding channels communicating with a feeding channel. The profile cross-sectional insert has four in symmetry located in it prominences with a form-shaping external surface in the form of a parabolic curve with a constant of curvature K = 0.05 l/mm. The invention ensures improvement of the quality of the constructional platbands due to selection of optimal geometry of the cross section of molding channels.

EFFECT: the invention ensures improvement of the quality of the constructional platbands due to selection of optimal geometry of the cross section of molding channels.

4 dwg

Macaroni press // 2253991

FIELD: food engineering, in particular, equipment for obtaining of macaroni products.

SUBSTANCE: macaroni press has feeding hopper, pressing chamber, screw and profiling member with forming channels. Profiling member with forming channels defined by sleeves of porous material is composed of three round plates with axially aligned apertures conforming to profile of products to be obtained. Sleeves of porous material are fixed in said apertures. Apertures in middle plate have greater diameter and are adapted for forming air pockets connected with one another through channels for supplying of pressurized air. Pressing chamber has groove arranged at site where profiling member is positioned, said groove being adapted for supplying and uniform distribution of pressurized air along the entire perimeter of profiling member.

EFFECT: improved quality of ready product and increased efficiency of macaroni press.

3 dwg

FIELD: chemical industry; food industry; thermoplastic polymeric materials molding by extrusion.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to thermoplastic polymeric materials molding by extrusion, mainly to an extrusion of polyethylene and may be used at production of pipes, structural sections, a film. The device contains a nozzle, which base is made out of one material, and on an inner surface of its cavity in the place, which adjoins its outlet, there is a coating or a fixed insert made out of another material, that is elastic as contrasted to a melt of the polymeric material. The length of the coating or the insert is no less than 1/10 of a gap width for the melt squeezing out. The invention ensures an increase of the flawless extrusion rate of melts of the polymers subject to crushing.

EFFECT: the invention ensures an increase of the flawless extrusion rate of melts of the polymers subject to crushing.

2 cl, 15 dwg

Extruder die // 2245249

FIELD: production of devices for extrusion of vegetable products.

SUBSTANCE: the invention is dealt with the equipment for extrusion of vegetable products and may be used in the processing branches of the agro-industrial complex. The die of the extruder contains a body and at least one insert made in the form of a branch-pipe out of an elastic material. The outlet section of the branch-pipe is located outside the body and is supplied with radial stops defining the form of the cross-section of the outlet aperture. The outlet section of the branch-pipe is placed in a cartridge that forms stationary radial stops. The cartridge is supplied with guides, in which there is at least one of the stops with a capability of radial motion. The thickness of the branch-pipe wall at its outlet section is decreasing in the direction to its outlet aperture. The invention ensures expansion of functionalities of the die.

EFFECT: the invention ensures expansion of functionalities of the die.

2 cl, 5 dwg

The invention relates to the processing of thermoplastic materials and can be used in the industries employing the extrusion

FIELD: chemical industry; other industries; devices for extrusion and granulation the plastics materials.

SUBSTANCE: the invention is pertaining to the equipment for extrusion and granulation the plastics materials. The spinneret for the granulator of the plastics materials contains the steel body and the working section connected to it. The working section is made in the form of the set of the hard-alloy components with the molding channels. The hard-alloy components are supplied with the reinforcing framings made of the tool steel. The reinforcing framings are rigidly fixed to the spinneret body. The steel body consists of two and more constituent parts. Each part represents the metallic disk with the conical molding channels. The constituent parts differ among themselves by their inlet and outlet diameter of the molding channel. The outlet diameter of the molding channel of one constituent part is equal to the inlet diameter of the molding channel of the following constituent part. The invention allows to vary the diameter of the molding extrusion hole of the spinneret and to increase effectiveness of the granulation process.

EFFECT: the invention allows to vary the diameter of the molding extrusion hole of the spinneret and to increase effectiveness of the granulation process.

6 cl, 2 dwg

FIELD: food processing industry; food processing production lines.

SUBSTANCE: the invention is pertaining to reprocessing the food raw materials and may be used in the lines production of the extruded food products. The line of production contains the mixer, the device for preliminary hydrothermal treatment of the source raw, the extruder, the gas-steam absorber, the dehydrator and the sifting device. The device for the preliminary hydrothermal treatment of the source raw is made in the form of the vertical auger conveyor. On its outer part of the body there is sectional device for the tangential feeding of the steam flow. The inner part of the body of the vertical auger conveyor connected with the sectional device is made netted for the steam passage inside the body. Behind the extruder there is the mounted gas-steam absorber made as the screen shaker with the IR-heating. The food product treated in the gas-steam absorber is fed into the pelleting apparatus, in which the mixture of the multifunctional additives is fed. From the pelleting apparatus the extruded granules with the additives applied on their surface are directed for maintaining the set humidity and heating mode into the dehydrator. The dehydrator is made in the form of the diffusion chamber with the belt-type perforated transporter. The dehydrator is additionally equipped with the recirculating pipeline and the steam generator. From the dehydrator the granules are fed in the intermediate hopper-storage, and from it they are fed for the prepacking and packaging. The invention allows to dilate the range of the produced extrudates, to reduce the temperature of the product treatment in the extruder, to decrease the duration of the product staying in it.

EFFECT: the invention ensures the dilation of the range of the produced extrudates, reduction of the temperature of the product treatment in the extruder and the duration of the product staying in it.

1 dwg

Extruder // 2299124

FIELD: extrusion equipment; production of extruded food-staff in food-processing industries.

SUBSTANCE: proposed extruder has housing, screw feeder with drive and molding head with tip and taper core. Taper core is provided with shaft. Taper core is sectionalized. It consists of two parts; each part may be regulated in direction and rotational speed by means of coaxial shafts and reduction gear. One shaft is solid and is located inside hollow shaft. Tip performs reciprocating motion along extruder axis by means of rack mechanism and splines found on inner surface of tip where guides rigidly connected with surface of outlet end of extruder body are located. Shape of guides on extruder body copies shape of splines on tip and guides are received by splined slots of tip. Gear wheel of rack mechanism rigidly secured on its shaft is thrown into engagement with rack rigidly secured to tip. Taper angles of inner part of tip and taper core are so selected that clearance in between them has form of taper circular passage. Outer surface of last part of core and inner surface of taper part of tip are knurled for obtaining the required shape of product. Extruded product does not require further grinding.

EFFECT: improved quality of finished product.

1 dwg

FIELD: chemical industry; methods of production of the granules of the foaming styrene polymeric compound.

SUBSTANCE: the invention is pertaining to the polymer chemistry and, in particular, to production of the granules of the foaming polysterene. The method provides for feeding of the streams of the melt of the polymeric compound and the foaming agent into the mixing zone, the dispersion of the foaming agent in the melt of the polymeric compound at the intense cutting up stirring action in the first static mixer, aging of the produced mixture at the intense cutting up stirring action in the second static mixer, chilling of the mixture at stirring action in the third static mixer up to the intermediate temperature with the subsequent chilling of the mixture at the stirring action in the third static mixer up to the temperature necessary for the process of granulation, extrusion of the filaments of the polymeric compound with their quick chilling and granulation. During the production process keep the weight ratio of the smelt stream GS to the stream of the foaming agentGFA within the range of 13-19, the temperature in the first static mixer with the intensive cutting stirring action, equal to: and in the second and in the third static mixers accordingly equal to: and where: GFAmax - the value of the foaming agent maximum possible stream;GFA run - the value of the used foaming agent stream at maintaining the ratio of the smelt fluidity factor (SFF) to the average-weight molecular mass(Mw) within the limits of (0.8-12.0)·10-5. Thereby there is the possibility of reprocessing of the broad range of the sorts of the polysterene for the further production of the polystyrene with the broad range of the consumable properties. The technical result, which is achieved within the method of the invention ensures the possibility of reprocessing in the FPS (the foaming polysterene) of the broad range of the sorts of the polysterene for the further production of the FPS (the foaming polystyrene) with the broad range of the consumable properties.

EFFECT: the invention ensures the possibility of reprocessing in the foaming polysterene of the broad range of the sorts of the polysterene for the further production of the foaming polystyrene with the broad range of the consumable properties.

4 cl, 8 ex

FIELD: chemical industry; methods and the devices of the thermal treatment of the polyethylene terephthalate granules.

SUBSTANCE: the invention is pertaining to the methods of the thermal treatment of the granules of the polyester and the device for the method realization. The technical result of the invention is development of the method of crystallization of the polyethylene terephthalate (PET) granules, which is realized without feeding of the exterior power or heat. The invention offers the method of the thermal treatment of the PET granules for achievement of the partial crystallization providing for feeding of the PET molten bath into the submerged granulator of the thermal cutting, its granulation, feeding of the gained granulate into the device separating the water and the solid substance, where the crystallization starts and the drained granulate with the granulate temperature exceeding 100°С is guided to the transporter, from which the granulate comes out with the temperature exceeding 100°С. The invention also offers the device for realization of this method.

EFFECT: the invention represents the development of the method of crystallization of the polyethylene terephthalate (PET) granules, which is realized without feeding of the exterior power or heat.

12 cl, 1 dwg

FIELD: producing polymers.

SUBSTANCE: device comprises die, cutting chamber, and cutting system. The die has cylindrical body whose outer side is provided with a number of plates provided with a number of openings for extrusion and a number of passages for supplying melted polymer. The passages are provided inside the cylindrical body accordingly to the perforated plates and are connected to them. The passages are lined with a high heat-conducting material. The cutting chamber has a row of spraying nozzles that generate the jet of droplets of the heat control liquid that is sprayed over the die. The heat control liquid is used for cooling and removing the cut granules. The cutting system has cutting plate secured to the rotating shaft and bearing an assembly of knives. The knives are mounted for permitting the cutting profile of the knife to be positioned radially with respect to the surface of the dies that faces the cutting system. The temperature of the die housing is maintained at a level of softening of the polymer or higher.

EFFECT: prolonged service life.

14 cl, 3 dwg

FIELD: manufacture of pellets of foamed thermoplastic polymers, equipment for making such pellets.

SUBSTANCE: method is realized by using extrusion process and it comprises steps of increasing temperature of polymer till point higher than its melting temperature in extruder with one or several augers; adding at least one foaming agent to melt polymer; pelletizing polymer in apparatus for hot pelletizing of thermoplastic polymers. Such apparatus includes draw plate arranged in head of extruder and having cylindrical body with row of small plates on its surface. Said plates have row of openings for extrusion and large number of ducts for supplying melt polymer. Apparatus for pelletizing also includes cutting chamber with set of spraying nozzles for creating flow of drops of thermostatic-control liquid kept at temperature in range 10°C - polymer softening temperature and used for cooling and removing cut pellets due to spraying said liquid and splashing it by draw plate; cutting system with cutting plate rigidly secured to rotating shaft and carrying set of cutters mounted in such a way that cutting profile of cutter is arranged along radius relative to surface of draw plate turned to cutting system. Then produced pellets are annealed by heating them till temperature higher than glass transition temperature and cooled till 20°C. Apparatus for hot pelletizing of thermoplastic foamed polymers includes extruder with one or several augers; draw plate arranged in head of extruder; chamber having set of spraying nozzles and cutting system with cutting plate rigidly secured to rotating shaft and carrying set of cutters. Cutters are arranged in such a way that cutting profile of cutter is radial relative to surface of draw plate turned to said cutting system. Draw plate includes cylindrical body with row of small plates on its surface. Said small plates have row of openings for extrusion and row of ducts for supplying melt polymer arranged inside body. Tubular reactor for annealing pellets has length providing presence of pellets in it equal at least to 30 min. Produced pellets are not- oriented and not-stressed ones.

EFFECT: possibility for producing high-quality uniform cellular structure pellets with narrow distribution of their sizes.

18 cl, 4 dwg, 2 tbl, 6 ex

FIELD: chemical industry; methods of manufacture of the granulated thermoplastic multicomponent armored compositions.

SUBSTANCE: the invention is dealt with the methods of manufacture of the granulated thermoplastic multicomponent armored compositions and may be used in operations of armoring of the surfaces of the solid rocket propellant charges for the rocket engines and other sources of power. The method provides for the loading in the heated and supplied with the blade stirrers mixer of the acetyl cellulose, acetyl triethyl citrate, β-(2.4- phenoxy)-ethanol and hydrazodicarbon amide, plasticization of the acetyl cellulose in the process of the components mixing at the heightened temperature, refrigeration of the armored composition upon termination of the mixture, its plasticization and the subsequent its extrusion in granules. At that for loading in the mixer use acetyl cellulose ground in the №25-№46 bolters. The dispersivity of the particles of hydrazodicarbon amide is ensured as of no more than 6 microns. Mixing of the components is conducted at the temperature of 60-80°C within 1.5-2.5 hours, then the armored composition is cooled to the temperature of 15-20°C, reloaded into the extruding machine to conduct extrusion at the temperature of 100-150°C. The invention allows to improve manufacturability and to raise productivity of armoring of the charges of the solid rocket propellant.

EFFECT: the invention ensures improved manufacturability and the raised productivity of armoring of the charges of the solid rocket propellant.

3 cl, 2 dwg, 1 tbl, 3 ex

FIELD: synthetic rubber industry; devices for production of general mechanical rubber products.

SUBSTANCE: the invention is pertaining to the synthetic rubber industry and production of general mechanical rubber products, in particular, to production and processing of synthetic rubber and the compounded systems on the synthetic rubber base. The device for granulation of elastomers contains a screw extruder, a cutting tool and a profiling head, made in the form of an external and internal spinneret plates with holes and a conical protrusion. The holes of both spinneret plates are arranged coaxially along the deploying from the center of the plates to the equiangular spirals with a decreasing from the center to peripheral density of the holes arrangement. The spinneret plates are supplied with the inserts installed in the holes of the plates and consisting each of two parts. At that one part of the insert is mounted in the internal spinneret plate, and other part is installed in the external spinneret plate. The part of the insert installed in the internal spinneret plate contains a converging channel. The part of the insert mounted in the external spinneret plate has a diffuser channel with the ratio of the diameter of the outlet hole of the diffuser to a minimal top diameter of the channel as D/d = 1.05-1.3 and the length amounting to 25-75 % from a total length of the convergent and the diffuser channels. The convergent and the diffuser channels are made in the form of the truncated elliptic paraboloids with their vertexes facing each other. The invention ensures production of the stable in dimensions granules of elastomers.

EFFECT: the invention ensures production of the stable in dimensions granules of elastomers.

5 dwg

FIELD: granulation of thermoplastic polymeric compounds.

SUBSTANCE: the invention is pertaining to the method of a granulation of thermoplastic polymeric compounds, in particular, to thermoplastic polyolefins. According to the method the polymeric powder produced in the polymerization reactor is melted and homogenized in an extruder, then it is pressed through an extrusive nozzle and granulated. Before loading into the extruder load in a plodder a polymeric powder-subjected to the thermal treatment by heating it up to the temperature by 5-30°C below the melting temperature of the polymeric compound. At that the thermal energy necessary for thermal treatment of the polymeric powder is produced due to the usage of the waste heat of the exothermic reaction of polymerization. The invention allows to increase efficiency and productivity of homogenization of the material at granulation and productivity.

EFFECT: the invention ensures increased efficiency and productivity of homogenization of the material at granulation process.

6 cl

FIELD: food-processing industry.

SUBSTANCE: method involves preliminarily cutting, pressing and granulating raw material, with juice being expelled at grinding and pressing stages; drying resulted granules by providing infrared power feeding from each side, with initial content of dry substances in pumpkin granules constituting 16%, diameter of granules making 0.004 m, and heat flux density making 2.69 kW/m2.

EFFECT: increased yield of dry product, increased nutrient value and content of vitamins.

2 tbl, 3 ex

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