CN211467389U

CN211467389U - Extrusion die with deflection shunting holes for plastic extruder

Info

Publication number: CN211467389U
Application number: CN202020042725.8U
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: 2020-09-11
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses an extrusion die with deflection shunting holes for a plastic extruder, which comprises a core die component, which extends along the front and back direction; the shunt assembly comprises a shunt cone and a shunt ring, and the shunt cone, the shunt ring and the core mold assembly are sequentially and coaxially fixedly connected from front to back; the bush module, coaxial fixed cover is established in the outside of mandrel module and reposition of redundant personnel subassembly, the bush module has the material to go into with, be equipped with the reposition of redundant personnel runner between bush module and the reposition of redundant personnel awl, be equipped with between bush module and the mandrel module and extrude the runner, the reposition of redundant personnel ring has a plurality of diffluence holes that link up this diffluence ring, the material entry, the reposition of redundant personnel runner, a plurality of diffluence holes and extrusion runner are linked together in proper order, a plurality of diffluence holes are arranged on the diffluence ring along the circumferencial direction array, the extending direction and the fore-. Effectively avoid the production of flow distribution line, finally make the surface quality of goods improve.

Description

Extrusion die with deflection shunting holes 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 core die, a splitter cone, a splitter ring and a die, wherein the core die is a rod-shaped body extending along a straight line direction, the straight line direction is generally the extrusion direction of materials, the splitter cone, the splitter ring and the core die are sequentially and coaxially fixedly connected and jointly sleeved on the inner side of the core die, the die is provided with a material inlet, a splitter flow channel is arranged between the die and the splitter cone, an extrusion flow channel is arranged between the die and the core die, the splitter ring is generally provided with a plurality of splitter holes, and the material inlet, the splitter flow channel, the splitter holes and the extrusion flow channel are sequentially communicated, so that the materials are split by the splitter cone, split again through the splitter holes, enter the extrusion flow channel and are compressed, and finally.

Because the conventional splitter ring is generally of a straight line structure, the material is rapidly divided by the splitter holes and flows into the extrusion flow channel, the material is extruded out before being compacted when being compressed by the extrusion flow channel due to the high flow rate of the material, and the material is not sufficiently compressed, so that a splitter line is easily generated, and the surface quality of a finally formed product is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a can avoid producing the higher an extrusion tooling who is used for plastics extruder to have the reposition of redundant personnel hole that deflects of flow distribution line, goods surface quality.

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

an extrusion die with deflected diverter holes for a plastic extruder comprising:

a core mold assembly extending in a front-rear direction;

the shunt assembly comprises a shunt cone and a shunt ring, and the shunt cone, the shunt ring and the core mold assembly are sequentially and coaxially fixedly connected from front to back;

the mouth mold assembly is coaxially and fixedly sleeved on the outer sides of the core mold assembly and the flow dividing assembly, the mouth mold assembly is provided with a material inlet, a flow dividing channel is arranged between the mouth mold assembly and the flow dividing cone, an extrusion channel is arranged between the mouth mold assembly and the core mold assembly, the flow dividing ring is provided with a plurality of flow dividing holes penetrating through the flow dividing ring, and the material inlet, the flow dividing channel, the flow dividing holes and the extrusion channel are sequentially communicated;

the plurality of the shunting holes are arranged on the shunting ring along the circumferential direction in an array mode, and the extension direction of each shunting hole is arranged in a mode of angular deflection with the front-back direction.

In the above technical scheme, preferably, the shunt ring includes an inner ring body, an outer ring body, and a plurality of shunt ribs, the inner ring body is coaxially sleeved on the inner side of the outer ring body, the shunt ribs are connected between the inner ring body and the outer ring body and are arranged in an array along the circumferential direction, a shunt hole is formed between two adjacent shunt ribs, and an α angle is formed between the extending direction of each shunt rib and the radial direction of the shunt ring.

In the above technical solution, preferably, the α angle is 5 ° to 10 °.

In the above technical solution, preferably, each of the shunting ribs is inclined in the front-rear direction and is disposed at an angle β with the end surface of the shunting ring.

In the above technical solution, preferably, the β angle is 5 ° to 10 °.

In the above technical solution, preferably, the core mold assembly includes a core rod and at least one cooling sleeve, a cavity extending in a front-back direction is provided inside the core rod, the at least one cooling sleeve is coaxially disposed in the cavity and in heat-conducting contact with a cavity wall, a fluid pipeline disposed in a circumferential direction is provided inside the cooling sleeve, and the cooling sleeve is provided with an inlet and an outlet communicated with the fluid pipeline.

In the above technical solution, preferably, the cooling sleeve has a plurality of cooling sleeves, and the plurality of cooling sleeves are arranged at equal intervals in the front-rear direction.

In the above technical scheme, preferably, the cooling sleeve is of a half-type structure and comprises an upper half cylinder and a lower half cylinder which are mutually embraced, fluid pipelines are arranged inside the upper half cylinder and the lower half cylinder, and the fluid pipelines in the upper half cylinder and the lower half cylinder are mutually independently arranged.

In the above technical solution, preferably, the upper half cylinder and the lower half cylinder are both provided with electric heating coils therein.

In the above technical scheme, preferably, the neck ring mold assembly includes a tail mold sleeve, an adjusting ring and a neck ring mold which are coaxially and fixedly connected in sequence from front to back, the shunt ring is fixedly connected between the tail mold sleeve and the adjusting ring, a shunt flow channel is formed between the tail mold sleeve and the shunt cone, and an extrusion flow channel is formed between the adjusting ring and the core rod and between the neck ring mold and the core rod.

The utility model discloses a arrange a plurality of diffluent holes on the splitter ring along the circumferencial direction array, the extending direction and the fore-and-aft direction of each diffluent hole become the angular deflection setting, thereby material after shunting cone shunts is after shunting once more through the diffluent hole, the flow direction of material can the deflection angle, the material is rotatory along the direction of extruding, the velocity of flow of material slows down, thereby it increases to get into to extrude the material in the runner can the accumulation, the material is when extruding the runner compression, can press more to be real, effectively avoid the production of reposition of redundant personnel line, finally make the surface quality of goods can improve.

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;

FIG. 3 is a side schematic view of the cooling sleeve of the present invention;

fig. 4 is a side view schematic of the diverter ring of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is an enlarged partial schematic view at B in FIG. 4;

wherein: 1. a core mold assembly; 11. a core rod; 111. a cavity; 12. cooling the sleeve; 121. a fluid line; 122. an inlet; 123. an outlet; 124. an upper half cylinder; 125. a lower half cylinder; 126. an electric heating coil;

2. a flow diversion assembly; 21. a spreader cone; 22. a shunt ring; 221. an inner ring body; 222. an outer ring body; 223. shunting ribs; 224. a shunt hole;

3. a die assembly; 31. a tail die sleeve; 311. a material inlet; 32. an adjusting ring; 33. a neck ring mold;

41. a flow dividing channel;

42. and extruding the flow channel.

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 up, down, front, back, left and right positional relationships described in this embodiment correspond to the positional relationships shown in fig. 1 to 5, respectively.

As shown in fig. 1, the present extrusion die with deflected diverging holes comprises a core die assembly 1, a diverging assembly 2, and a die assembly 3. The core mold assembly 1 includes a core rod 11, and the core rod 11 extends in the front-rear direction. The shunting assembly 2 comprises a shunting cone 21 and a shunting ring 22, and the shunting cone 21, the shunting ring 22 and the core mold assembly 1 are sequentially and coaxially and fixedly connected from front to back. The mouth mold component 3 is coaxially and fixedly sleeved on the outer sides of the core mold component 1 and the shunting component 2, the mouth mold component 3 is provided with a material inlet 311, a shunting flow channel 41 is arranged between the mouth mold component 3 and the shunting cone 21, an extrusion flow channel 42 is arranged between the mouth mold component 3 and the core mold component 1, the shunting ring 22 is provided with a plurality of shunting holes 224 penetrating through the shunting ring 22, and the material inlet 311, the shunting flow channel 41, the shunting holes 224 and the extrusion flow channel 42 are sequentially communicated. Specifically, the neck ring module 3 includes a tail die sleeve 31, an adjusting ring 32 and a neck ring 33 coaxially and fixedly connected in sequence from front to back, the shunt ring 22 is fixedly connected between the tail die sleeve 31 and the adjusting ring 32, a shunt flow channel 41 is formed between the tail die sleeve 31 and the shunt cone 21, and an extrusion flow channel 42 is formed between the adjusting ring and the core rod 11 and between the neck ring 33 and the core rod 11. In this example, the die assembly and the core module are designed into a split structure, which is more convenient to install compared with the prior art in which the die and the core module are designed into a single structure.

As shown in fig. 2 to 3, in order to heat or cool the inside of the extrusion die, maintain the melting temperature of the material, and ensure that the material is not decomposed by overheating, the core die assembly 1 includes a cooling sleeve 12, a cavity 111 extending in the front-rear direction is provided inside the core rod 11, the cooling sleeve 12 is coaxially provided in the cavity 111 and is in heat-conductive contact with the cavity wall, a fluid pipe 121 arranged in the circumferential direction is provided inside the cooling sleeve 12, and an inlet 122 and an outlet 123 communicating the fluid pipe 121 are provided on the cooling sleeve 12. Cooling water/oil may be introduced into the fluid line. Specifically, the cooling sleeve 12 has a plurality of cooling sleeves 12 arranged at equal intervals in the front-rear direction. Each cooling sleeve 12 is of a half structure, and includes an upper half cylinder 124 and a lower half cylinder 125 which are mutually wrapped, fluid pipelines 121 are respectively arranged inside the upper half cylinder 124 and the lower half cylinder 125, and the fluid pipelines 121 in the upper half cylinder 124 and the fluid pipelines 121 in the lower half cylinder 125 are mutually independently arranged. An electric heating coil 126 is arranged in each of the upper cylinder body 124 and the lower cylinder body 125. Heating the cooling sleeve 12 by an electrical heating coil 126, using water/oil in the fluid line as a heat transfer medium, thereby heating the material in the extrusion die; after the electric heating coil is powered off, water/oil in the fluid pipeline can be led out through the outlet, chilled water or cooling oil is led in through the inlet to cool the extrusion die, the extrusion die is prevented from being too high in temperature, and materials are not prone to pyrolysis. Of course, in other embodiments, the number of the cooling sleeves is not limited to be designed into a plurality of cooling sleeves, and may be only one, and the structure of the cooling sleeves is not limited to adopt a huff-type clasping structure, and may also be designed into an integral cylinder structure.

As shown in fig. 4-6, the diverting ring 22 includes an inner ring 221, an outer ring 222, and a plurality of diverting ribs 223, the inner ring 221 is coaxially sleeved on the inner side of the outer ring 222, the plurality of diverting ribs 223 are connected between the inner ring 221 and the outer ring 222 and arranged in an array along the circumferential direction, a diverting hole 224 is formed between two adjacent diverting ribs 223, and an angle α is formed between the extending direction of each diverting rib 223 and the radial direction of the diverting ring 22. Each diverter rib 223 is inclined in the front-rear direction and is disposed at an angle β with the end surface of the diverter ring 22. One of the two adjacent shunting ribs inclines from front to back, and the other shunting rib inclines from back to front. Wherein the alpha angle is 5-10 degrees, and the beta angle is 5-10 degrees. As such, the plurality of diversion holes 224 are arranged on the diversion ring 22 in a circumferential array, and the extension direction of each diversion hole 224 is disposed at an angle offset from the front-rear direction. Referring to fig. 1 again, after the material shunted by the shunting cone 21 is shunted again through the shunting hole 224, the flow direction of the material can deflect by a certain angle, the material rotates along the extrusion direction, the flow rate of the material is slowed down, so that the material entering the extrusion flow channel 42 can be accumulated and increased, the material can be pressed more firmly when being compressed by the extrusion flow channel 42, the generation of shunting lines is effectively avoided, and finally the surface quality of a product can be improved.

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. An extrusion die with deflected diverter holes for a plastic extruder comprising:

a core mold assembly (1) extending in the front-rear direction;

the flow distribution assembly (2) comprises a flow distribution cone (21) and a flow distribution ring (22), and the flow distribution cone (21), the flow distribution ring (22) and the core mold assembly (1) are sequentially and coaxially fixedly connected from front to back;

the mouth mold component (3) is coaxially and fixedly sleeved on the outer sides of the core mold component (1) and the flow dividing component (2), the mouth mold component (3) is provided with a material inlet (311), a flow dividing flow channel (41) is arranged between the mouth mold component (3) and the flow dividing cone (21), an extrusion flow channel (42) is arranged between the mouth mold component (3) and the core mold component (1), the flow dividing ring (22) is provided with a plurality of flow dividing holes (224) penetrating through the flow dividing ring (22), and the material inlet (311), the flow dividing flow channel (41), the flow dividing holes (224) and the extrusion flow channel (42) are sequentially communicated; it is characterized in that the preparation method is characterized in that,

a plurality of the shunting holes (224) are arranged on the shunting ring (22) along the circumferential direction array, and the extension direction of each shunting hole (224) is arranged by being deflected at an angle with the front-back direction.

2. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 1, wherein: the shunting ring (22) comprises an inner ring body (221), an outer ring body (222) and a plurality of shunting ribs (223), wherein the inner ring body (221) is coaxially sleeved on the inner side of the outer ring body (222), the shunting ribs (223) are connected between the inner ring body (221) and the outer ring body (222) and are arranged in an array mode along the circumferential direction, shunting holes (224) are formed between every two adjacent shunting ribs (223), and an alpha angle is formed between the extending direction of each shunting rib (223) and the radial direction of the shunting ring (22).

3. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 2, wherein: the alpha angle is 5-10 degrees.

4. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 2, wherein: each shunting rib (223) inclines along the front-back direction and forms an angle beta with the end surface of the shunting ring (22).

5. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 4, wherein: the beta angle is 5-10 degrees.

6. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 1, wherein: the core mold assembly (1) comprises a core rod (11) and at least one cooling sleeve (12), a cavity (111) extending in the front-back direction is formed in the core rod (11), the at least one cooling sleeve (12) is coaxially arranged in the cavity (111) and is in heat conduction contact with a cavity wall, a fluid pipeline (121) arranged in the circumferential direction is formed in the cooling sleeve (12), and an inlet (122) and an outlet (123) communicated with the fluid pipeline (121) are formed in the cooling sleeve (12).

7. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 6, wherein: the cooling sleeve (12) is provided with a plurality of cooling sleeves (12), and the plurality of cooling sleeves (12) are arranged at equal intervals along the front-back direction.

8. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 6, wherein: the cooling sleeve (12) is of a half-shell structure and comprises an upper half cylinder body (124) and a lower half cylinder body (125) which are mutually embraced, fluid pipelines (121) are arranged inside the upper half cylinder body (124) and the lower half cylinder body (125), and the fluid pipelines (121) in the upper half cylinder body (124) and the fluid pipelines (121) in the lower half cylinder body (125) are mutually independently arranged.

9. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 8, wherein: and electric heating coils (126) are arranged in the upper half cylinder body (124) and the lower half cylinder body (125).

10. The extrusion die with the deflection diverting hole for the plastic extruder as set forth in claim 1, wherein: the neck ring mould assembly (3) comprises a tail mould sleeve (31), an adjusting ring (32) and a neck ring (33) which are sequentially and coaxially and fixedly connected from front to back, a shunt ring (22) is fixedly connected between the tail mould sleeve (31) and the adjusting ring (32), a shunt flow channel (41) is formed between the tail mould sleeve (31) and a shunt cone (21), and an extrusion flow channel (42) is formed between the adjusting ring and a core rod (11) and between the neck ring (33) and the core rod (11).