CN108274723B

CN108274723B - Co-extrusion converging device

Info

Publication number: CN108274723B
Application number: CN201810097224.7A
Authority: CN
Inventors: 何海潮; 杨少文
Original assignee: SUZHOU JWELL PRECISION MACHINERY CO Ltd
Current assignee: SUZHOU JWELL PRECISION MACHINERY CO Ltd
Priority date: 2018-01-31
Filing date: 2018-01-31
Publication date: 2023-09-08
Anticipated expiration: 2038-01-31
Also published as: CN108274723A

Abstract

The invention discloses a co-extrusion confluence device, which belongs to the technical field of plastic extrusion and solves the technical problems of lower product yield and lower product quality of the co-extrusion confluence device in the prior art, wherein the co-extrusion confluence device comprises a distribution body, a distribution core rod and a confluence body; in addition, the confluence device adopting the upper and lower flow passage structure enables two materials to be converged in an upper and lower parallel mode, and the problem of a dividing line in the middle of a product can be effectively solved.

Description

Co-extrusion converging device

Technical Field

The invention relates to the technical field of plastic extrusion, in particular to a co-extrusion converging device for producing HDPE plastic.

Background

At present, with the rapid development of the plastic industry, the production requirement of the HDPE (high-density polyethylene) waterproof coiled material production line is higher and higher, and due to the limitation of the single extruder production and the production line equipment cost, more and more production lines adopt two extruders for coextrusion, so that higher production is achieved. There is a need for a co-extrusion converging device that merges multiple strands of material and feeds the material into a die. According to the conventional converging mode shown in fig. 1 and fig. 2, front and rear cylindrical materials directly enter a cavity to be converged and then flow into a die, and as the two materials directly enter a converging device in a butt-impact manner, the pressure in a runner is large, and the yield of an extruder is reduced after the resistance is increased; meanwhile, due to the fact that plasticizing capacities of the two extruders are different, plasticizing and melting degrees of extruded plastics are different, a product made through a die after two materials are combined has an obvious combined boundary in the middle, and therefore quality of the product is affected.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a co-extrusion converging device which can enable the product yield to be higher and the product quality to be better.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

the utility model provides a coextrusion flow combiner, includes the distribution body that has front and back feed inlet, fixed setting be in the inside distribution plug of distribution body, with the distribution body links to each other and has the confluence body of total discharge gate, the distribution body with have along upper and lower direction arrangement between the distribution plug and with upper runner and the lower runner that front and back feed inlet meets respectively, the distribution body have with upper runner and lower discharge gate that lower runner meets respectively, upper and lower discharge gate jointly with total discharge gate meets.

In the above technical solution, preferably, one ends of the upper and lower runners are provided with hemispherical interfaces respectively connected with the front and rear feed inlets, and the other ends of the upper and lower runners are provided with waist-shaped interfaces respectively connected with the upper and lower discharge outlets.

In the above technical scheme, preferably, the distributing body is provided with a triangular protrusion between the upper and lower discharge ports, and the triangular protrusion is provided with an upper drainage part connected between the upper discharge port and the total discharge port and a lower drainage part connected between the lower discharge port and the total discharge port.

In the above technical solution, preferably, the joining body has a concave portion matching with the protrusion, and the total discharge port is located at the bottom of the concave portion

In the above technical scheme, preferably, an included angle of 60-90 degrees is formed between the front feed inlet and the rear feed inlet.

In the above technical solution, preferably, a sealing flange for sealing the dispensing mandrel is fixedly disposed on the dispensing body.

In the above technical solution, preferably, a heater is disposed in the joining body.

In the above technical solution, preferably, a connecting flange for connecting with an extrusion die is fixedly disposed on the fluid.

Compared with the prior art, the invention has the following beneficial effects: the co-extrusion confluence device is of a structure that the front and rear feed inlets and the inside are provided with the upper and lower flow channels, so that the impact on the flow channels by materials entering the confluence device can be reduced as much as possible, the pressure in the flow channels is smaller, and the product yield is improved after the resistance is reduced; in addition, the confluence device adopting the upper and lower flow passage structure enables two materials to be converged in an upper and lower parallel mode, and the problem of a dividing line in the middle of a product can be effectively solved.

Drawings

FIG. 1 is a schematic front view of a coextrusion confluence device in the prior art;

FIG. 2 is a schematic top view of a prior art co-extrusion flow combiner;

FIG. 3 is a schematic perspective view of the co-extrusion flow combiner of the present invention;

FIG. 4 is a schematic front view of the co-extrusion flow combiner of the present invention;

FIG. 5 is a schematic top view of the co-extrusion flow combiner of the present invention;

FIG. 6 is a schematic diagram showing the structural exploded view of the co-extrusion flow combiner of the present invention;

FIG. 7 is a schematic front view of a distribution core rod of the co-extrusion flow combiner of the present invention;

FIG. 8 is a schematic left-hand view of a distribution core rod of the co-extrusion flow combiner of the present invention;

FIG. 9 is a schematic drawing of a fluid flow diagram of a co-extrusion flow combiner of the present invention from the left;

FIG. 10 is a schematic diagram of a flow combining body of the co-extrusion flow combiner of the present invention from the right side;

wherein: 100. a co-extrusion flow combiner; 101. an article; 1. a dispensing body; 11. a feed inlet; 12. a rear feed inlet; 13. an upper discharge port; 14. a lower discharge port; 15. a protrusion; 151. an upper drainage part; 152. a lower drainage part; 2. a dispensing mandrel; 21. an upper flow passage; 22. a lower flow passage; 23. a hemispherical interface; 24. waist-shaped interfaces; 3. combining fluids; 31. a total discharge port; 32. a recessed portion; 33. a heater; 4. a sealing flange; 5. and (5) connecting the flanges.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings. The upper-lower-left-right-front-rear positional relationship described in the present embodiment corresponds to the upper-lower-left-right-front-rear positional relationship shown in fig. 4.

According to the conventional converging mode shown in fig. 1 and fig. 2, front and rear cylindrical materials directly enter a cavity to be converged and then flow into a die, and as the two materials directly enter a converging device in a butt-impact manner, the pressure in a runner is large, and the yield of an extruder is reduced after the resistance is increased; meanwhile, due to the fact that plasticizing capacities of the two extruders are different, plasticizing and melting degrees of extruded plastics are different, a product made through a die after two materials are combined has an obvious combined boundary in the middle, and therefore quality of the product is affected.

As shown in fig. 3, the co-extrusion combiner 100 includes a distributing body 1, a distributing plug 2, and a combining body 3, which are disposed in this order. Wherein, the distributing mandrel 2 is fixedly arranged in the distributing 1, and a sealing flange 4 for sealing the distributing mandrel 2 is fixedly arranged on the distributing body 1. The coupling body 3 is connected to the dispensing body 1. The front and rear ends of the distributor 1 are respectively provided with a front feed inlet 11 and a rear feed inlet 12, and an included angle of 60-90 degrees, preferably 90 degrees, is formed between the front feed inlet and the rear feed inlet; with reference to fig. 5, the front and rear feed ports are connected to two plastic extruders, for example, an a plastic extruder and a B plastic extruder (abbreviated herein as "a" and "B") capable of extruding a material and a B material, respectively. The combined fluid 3 is provided with a total discharge hole 31, a connecting flange 5 used for being connected with an extrusion die is fixedly arranged on the combined fluid 3, two materials entering the inside of the distribution body 1 from the front feed hole and the rear feed hole are finally converged into one material in the combined fluid 3, and finally the material flows into the extrusion die from the total discharge hole 31 to finally form a product.

As shown in fig. 4 and 5, the distribution rod 2 is inserted into the inside of the distribution body 1 in the up-down direction, and the sealing flange 4 is fixedly installed at the lower end portion of the distribution body 1. An upper runner 21 and a lower runner 22 which are arranged along the up-down direction and are respectively connected with the front feed port and the rear feed port are formed between the inside of the distribution body 1 and the distribution core rod 2, and the upper runner and the lower runner are combined into a runner in the combined body 3, and the runner is connected with the total discharge port 31; because two materials enter from the front feed inlet and the rear feed inlet and respectively pass through the upper runner and the lower runner, the materials are not directly converged into the mixed fluid 3, and therefore, the runner structure can reduce the impact of the materials on the runner as far as possible.

According to fig. 6, the upper and lower flow channels are provided on the distribution mandrel 2, and the distribution body 1 has a triangular protrusion 15 between the upper and lower discharge ports, the protrusion 15 having an upper drainage portion 151 connected between the upper discharge port 13 and the main discharge port 31, and a lower drainage portion 152 connected between the lower discharge port 14 and the main discharge port 31. A heater 33 is provided in the fluid 3, and in this embodiment, the heater 33 is an electric heating tube. The arrangement of the heater 33 enables the two materials with different melting degrees to be melted again when being combined, so that the two materials are further combined into one material, the defect of an intermediate boundary line is eliminated, and the quality of products is improved.

According to fig. 7 and 8, on the distribution mandrel 2, one end of the upper runner 21 is a hemispherical interface 23, the other end is a waist-shaped interface 24, the hemispherical interface 23 of the upper runner 21 is connected with the front feed inlet 11 on the distribution body 1, and the waist-shaped interface 24 of the upper runner 21 is connected with the upper discharge outlet 13 on the distribution body 1; the structure of the lower runner 22 is similar to that of the upper runner 21, one end of the lower runner 22 is a hemispherical interface 23, the other end is a waist-shaped interface 24, the hemispherical interface 23 of the upper runner 21 is connected with the rear feed port 12 on the distributing body 1, and the waist-shaped interface 24 of the lower runner 22 is connected with the lower discharge port 14 on the distributing body 1. The structure not only can reduce the impact force of two materials entering the distribution body 1, but also has smaller resistance of the materials in the distribution body 1, so that the yield is higher.

According to fig. 9 and 10, the joining body 3 has a concave portion 32 matched with the protrusion 15, the total discharge hole 31 is located at the bottom of the concave portion 32, two materials coming out from the upper and lower discharge holes of the distributing body 1 respectively flow to the total discharge hole 31 along the upper and lower drainage portions, and the concave portion 32 can squeeze the two materials, so that the two materials can be mutually pressed and fused when being joined, therefore, the final product is more difficult to have a dividing line, and the quality of the product is higher.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. The utility model provides a crowded confluence ware altogether which characterized in that: the plastic extruding machine comprises a distributing body (1) with front and rear feed inlets, a distributing mandrel (2) fixedly arranged in the distributing body (1), a converging body (3) which is connected with the distributing body (1) and is provided with a total discharge hole (31), wherein the front and rear feed inlets are respectively connected with two plastic extruding machines, an upper runner (21) and a lower runner (22) which are arranged along the up-down direction and are respectively connected with the front and rear feed inlets are arranged between the distributing body (1) and the distributing mandrel (2), the distributing body (1) is provided with an upper discharge hole (13) and a lower discharge hole (14) which are respectively connected with the upper runner (21) and the lower runner (22), and the upper discharge hole and the lower discharge hole are commonly connected with the total discharge hole (31); one ends of the upper and lower flow channels are provided with hemispherical interfaces (23) connected with the front and rear feed inlets respectively, and the other ends of the upper and lower flow channels are provided with waist-shaped interfaces (24) connected with the upper and lower discharge outlets respectively; the distribution body (1) is provided with a triangular bulge (15) between the upper discharge hole and the lower discharge hole, the bulge (15) is provided with an upper drainage part (151) connected between the upper discharge hole (13) and the total discharge hole (31) and a lower drainage part (152) connected between the lower discharge hole (14) and the total discharge hole (31).

2. The co-extrusion flow combiner according to claim 1, wherein: the converging body (3) is provided with a concave part (32) matched with the protrusion (15), and the total discharging hole (31) is positioned at the bottom of the concave part (32).

3. The co-extrusion flow combiner according to claim 1, wherein: an included angle of 60-90 degrees is formed between the front feed inlet and the rear feed inlet.

4. The co-extrusion flow combiner according to claim 1, wherein: a sealing flange (4) for sealing the distribution core rod (2) is fixedly arranged on the distribution body (1).

5. The co-extrusion flow combiner according to claim 1, wherein: a heater (33) is arranged in the converging body (3).

6. The co-extrusion flow combiner according to claim 1, wherein: and a connecting flange (5) used for being connected with an extrusion die is fixedly arranged on the converging body (3).