CN211542302U

CN211542302U - Extrusion die with cooling sleeve for plastic extruder

Info

Publication number: CN211542302U
Application number: CN202020043663.2U
Authority: CN
Inventors: 何海潮; 柳兵
Original assignee: SUZHOU JWELL PRECISION MACHINERY CO Ltd
Current assignee: SUZHOU JWELL PRECISION MACHINERY CO Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-09-22
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses an extrusion tooling that is used for having of plastics extruder cooling sleeve, including mandrel and bush, the mandrel extends along the fore-and-aft direction, the outside at the mandrel is established to the coaxial fixed cover of bush, still include cooling sleeve, cooling sleeve is fixed mutually with the preceding tip coaxial of bush, cooling sleeve has the centre bore that runs through this cooling sleeve, the internal diameter of centre bore is not less than the internal diameter of bush, its pore wall and the pipe heat conduction contact of extruding are configured to the centre bore, be equipped with import and export on the cooling sleeve, cooling sleeve's inside is equipped with the cooling runner along circumferencial direction spiral extension, import, cooling runner and export are linked together in proper order. Thereby through letting in cooling water/cooling oil in to the cooling runner to directly carry out the primary cooling for the pipe billet goods of extruding, the cooling effect is better.

Description

Extrusion die with cooling sleeve for plastic extruder

Technical Field

The utility model relates to a plastics extrude technical field, in particular to an extrusion tooling for plastics extruder.

Background

The PVC material, namely polyvinyl chloride, is one of the plastic products with the largest output in the world, and has wide application fields. PVC pipes are used for fluid transportation, such as water supply pipes, water drainage pipes and the like. The traditional PVC pipe is usually produced by using a plastic extruder, the plastic extruder usually comprises an extruder barrel, an extrusion screw, an extrusion die, a main motor and a feeding device, a feeding port is arranged on the extruder barrel, the feeding device is arranged on the feeding port and used for feeding PVC plastic particles into the feeding port, the extrusion screw is arranged in the extruder barrel and driven by the main motor to rotate at a high speed, the extrusion die is arranged on a discharge port of the extruder barrel, the fed plastic particles are plasticized and melted by using shearing heat between the extrusion screw and the inner wall of the extruder barrel to form a melt material, and then a tubular blank is extruded through the extrusion die. The extrusion die generally comprises a mouth die, a core die and a spreader cone, wherein the core die is coaxially and fixedly sleeved in the mouth die, an extrusion flow channel is arranged between the core die and the mouth die, a spreader flow channel is arranged between the mouth die and the spreader cone, the mouth die is provided with a material inlet, and the material inlet, the spreader flow channel and the extrusion flow channel are sequentially communicated.

Under the general condition, the pipe that comes out from extrusion tooling will pass through the sizing cover on next step to carry out preliminary cooling, the design in sizing cover inside, cool off at the vacuum box inside at last, the design, there is certain distance between extrusion tooling and the sizing cover however, this section distance only can cool off for the pipe through external air, refrigerated effect is not very good, the pipe cooling effect to the pipe thickness is very little, because the preliminary cooling design effect of pipe is relatively poor, influence the subsequent molding of pipe.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a can carry out primary cooling, better an extrusion tooling who is used for plastic extruder to have a cooling sleeve of cooling effect to extruding the pipe.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides an extrusion tooling who is used for plastics extruder to have cooling sleeve, includes mandrel and bush, the mandrel extend along the fore-and-aft direction, the coaxial fixed cover of bush establish the outside at the mandrel, still include cooling sleeve, cooling sleeve and the coaxial looks fixed of the front end of bush, cooling sleeve have the centre bore that runs through this cooling sleeve, the internal diameter of centre bore is not less than the internal diameter of bush, the centre bore configure into its pore wall and extruded pipe heat conduction contact, cooling sleeve on be equipped with import and export, cooling sleeve's inside is equipped with the cooling runner along circumferencial direction spiral extension, import, cooling runner and export be linked together in proper order.

In the above technical solution, preferably, the cooling sleeve includes an inner sleeve and an outer sleeve, the outer sleeve is coaxially sleeved outside the inner sleeve, a rear end portion of the inner sleeve extends to the outer periphery to form a shaft end portion, and the shaft end portion of the inner sleeve is fixed to an end surface of the die.

In the above technical solution, preferably, a heat insulating pad is provided between the shaft end of the inner sleeve and the end surface of the die.

In the above technical scheme, preferably, the extrusion die further includes an adjusting ring, a shunt ring, a tail die sleeve, a front die core and a shunt cone, the die, the adjusting ring, the shunt ring and the tail die sleeve are sequentially and coaxially fixed from front to back, the front end of the front die core is fixed to the die core, the rear end of the front die core is fixed to the shunt ring, the front end of the shunt cone is fixed to the shunt ring, the tail die sleeve has a material inlet, a shunt flow channel is formed between the tail die sleeve and the shunt cone, an extrusion flow channel is formed between the shunt ring and the front die core and between the die core and the die core, the shunt ring has a plurality of shunt ports communicating the shunt flow channel and the extrusion flow channel, and the material inlet, the shunt flow channel, the plurality of shunt ports and the extrusion flow channel are sequentially communicated.

The utility model discloses a set up cooling sleeve, cooling sleeve is fixed mutually with the preceding tip of bush, cooling sleeve has the centre bore that runs through this cooling sleeve, the internal diameter of centre bore is not less than the internal diameter of bush, its pore wall and the pipe heat conduction contact of extruding are configured to the centre bore, be provided with the cooling runner that extends along the circumferencial direction spiral in the cooling sleeve, be equipped with the import and the export of intercommunication cooling runner on the cooling sleeve, thereby through letting in cooling water cooling oil in to the cooling runner, thereby directly carry out the primary cooling for the pipe goods of extruding, the cooling effect is better.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic cross-sectional view of a cooling sleeve of the present invention;

wherein: 1. a core mold; 2. a neck ring mold; 3. an adjusting ring; 4. a shunt ring; 41. a shunt port; 5. a tail die sleeve; 51. a material inlet; 6. a front mold core; 7. a spreader cone; 8. a flow dividing channel; 9. extruding a flow channel; 10. cooling the sleeve; 101. a central bore; 102. an inlet; 103. an outlet; 104. a cooling flow channel; 11. an inner sleeve; 12. an outer sleeve; 13. a heat insulating pad.

Detailed Description

To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings. The front, rear, upper and lower positions in this embodiment correspond to the respective positional relationships shown in fig. 1.

As shown in fig. 1, the extrusion die comprises a core die 1, a die 2, an adjusting ring 3, a shunt ring 4, a tail die sleeve 5, a front die core 6, a shunt cone 7 and a cooling sleeve 10. The core mold 1 extends in the front-rear direction, and the front end portion of the front core 6 is fixed to the core mold 1. The mouth mold 2 is coaxially and fixedly sleeved on the outer side of the core mold 1. The neck ring mold 2, the adjusting ring 3, the shunt ring 4 and the tail mold sleeve 5 are coaxially fixed in sequence from front to back. The rear end part of the front mold core 6 is fixed with the shunting ring 4, and the front end part of the shunting cone 7 is fixed with the shunting ring 4. The tail die sleeve 5 is provided with a material inlet 51, and a shunting flow channel 8 is formed between the tail die sleeve 5 and the shunting cone 7. An extrusion flow channel 9 is formed between the splitter ring 4 and the front mold core 6 and between the mouth mold 2 and the core mold 1. The diverter ring 4 has a plurality of diverter ports 41 that communicate the diverter flow channels 8 with the extrusion flow channels 9. The material inlet 51, the diversion flow channel 8, the plurality of diversion ports 41 and the extrusion flow channel 9 are communicated in sequence.

The cooling sleeve 10 is coaxially fixed to the front end of the die 2, and as shown in fig. 2, the cooling sleeve 10 includes an inner sleeve 11 and an outer sleeve 12, the outer sleeve 12 is coaxially sleeved on the outer side of the inner sleeve 11, the rear end of the inner sleeve 11 extends to the outer periphery to form an axial end, and the axial end of the inner sleeve 11 is fixed to the end face of the die 2. In order to facilitate the smooth entry of the extruded tube blank into the cooling sleeve 10, the cooling sleeve 10 has a central hole 101 extending therethrough, the inner diameter of the central hole 101 being not smaller than the inner diameter of the die 2, the central hole 101 being arranged such that the wall of the hole thereof is in heat-conducting contact with the extruded tube blank. The cooling sleeve 10 is provided with an inlet 102 and an outlet 103, the inside of the cooling sleeve 10 is provided with a cooling channel 104 spirally extending along the circumferential direction, and the inlet 102, the cooling channel 104 and the outlet 103 are communicated in sequence. Therefore, cooling water/cooling oil is introduced into the cooling flow channel, so that extruded tube blank products are directly subjected to primary cooling, the cooling effect is better, subsequent tube blanks can enter the top diameter sleeve and the vacuum box, and the subsequent tube blanks can be cooled and formed conveniently.

In order to prevent heat from the die 2 from being transferred to the cooling sleeve 10 and ensure cooling performance of the cooling sleeve 10, a heat insulating pad 13 is provided between an axial end portion of the inner sleeve 11 and an end surface of the die 2.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an extrusion tooling who is used for cooling sleeve that has of plastics extruder, includes mandrel (1) and bush (2), mandrel (1) extend along fore-and-aft direction, bush (2) coaxial fixed cover establish the outside at mandrel (1), its characterized in that: the cooling sleeve is coaxially fixed with the front end of the neck ring mold (2), the cooling sleeve (10) is provided with a central hole (101) penetrating through the cooling sleeve, the inner diameter of the central hole (101) is not smaller than that of the neck ring mold (2), the central hole (101) is configured to enable the hole wall of the central hole to be in heat conduction contact with an extruded tube blank, an inlet (102) and an outlet (103) are formed in the cooling sleeve (10), a cooling flow channel (104) extending spirally along the circumferential direction is arranged in the cooling sleeve (10), and the inlet (102), the cooling flow channel (104) and the outlet (103) are communicated in sequence.

2. An extrusion die with a cooling jacket for a plastic extruder as set forth in claim 1, wherein: the cooling sleeve (10) comprises an inner sleeve (11) and an outer sleeve (12), the outer sleeve (12) is coaxially sleeved on the outer side of the inner sleeve (11), the rear end part of the inner sleeve (11) extends towards the outer periphery to form an axial end part, and the axial end part of the inner sleeve (11) is fixed with the end surface of the neck ring mold (2).

3. An extrusion die with a cooling jacket for a plastic extruder as set forth in claim 2, wherein: and a heat insulation pad (13) is arranged between the shaft end part of the inner sleeve (11) and the end surface of the neck ring mold (2).

4. An extrusion die with a cooling jacket for a plastic extruder as set forth in claim 1, wherein: the extrusion die further comprises an adjusting ring (3), a shunt ring (4), a tail die sleeve (5), a front die core (6) and a shunt cone (7), the die (2), the adjusting ring (3), the shunt ring (4) and the tail die sleeve (5) are sequentially and coaxially fixed from front to back, the front end part of the front die core (6) is fixed with the die core (1), the rear end part of the front die core (6) is fixed with the shunt ring (4), the front end part of the shunt cone (7) is fixed with the shunt ring (4), the tail die sleeve (5) is provided with a material inlet (51), a shunt flow channel (8) is formed between the tail die sleeve (5) and the shunt cone (7), a shunt flow channel (8) is formed between the shunt ring (4) and the front die core (6), and an extrusion flow channel (9) is formed between the die core (2) and the die core (1), the shunt ring (4) is provided with a plurality of shunt ports (41) for communicating the shunt flow channel (8) with the extrusion flow channel (9), the material inlet (51), the flow dividing channel (8), the flow dividing ports (41) and the extrusion channel (9) are communicated in sequence.