Sleeve film extrusion die head

Abstract

A sleeve-shaped film extrusion die head comprises a die head body, the die head body has a discharge port, the discharge port is composed of a die ring, a lower die core, and an upper die core, an extrusion section of an extrusion flow channel is formed between the lower die core and the die ring, and the outer circumferential surface of the lower die core comprises a striped curved surface area and a smooth curved surface area, and the striped curved surface area and the smooth curved surface area extend along the circumference of the outer circumferential surface respectively. The beneficial effect of the utility model is that due to the improvement of the lower die core, the outer circumferential surface is divided into a striped curved surface area and a smooth curved surface area, so the lower die core cooperates with the die ring, and the inner surface of the extruded sleeve-shaped film is a part of a curved surface with stripes, and a part is a smooth curved surface. The structure is simple and easy to manufacture. The manufactured sleeve-shaped film can well replace the existing two films for packaging articles, can effectively reduce the processing steps, improve work efficiency, and greatly reduce the scraps generated during processing, avoid waste, and reduce the negative impact on the environment.

Description

Technical Field

[0001] The utility model relates to a production device for a sleeve-shaped film, in particular to an extrusion die head capable of extruding a sleeve-shaped film with a stripe area and a smooth area on the inner side wall surface. Background Art

[0002] The inner wall surface of the sleeve-shaped film is smooth, which makes the sleeve-shaped film unable to meet the needs of certain specific fields, that is, half of the inner wall surface of the sleeve-shaped film needs to be covered with stripes, and the other half is a smooth surface. Therefore, they can only process the first film with both outer walls being smooth and the second film with one outer wall covered with stripes and the other surface being smooth separately, and then overlap the outer wall of the second film covered with stripes toward the first film and heat seal to obtain the finished packaging, that is, the finished packaging is obtained by processing two films.

[0003] However, the applicant has found that the above-mentioned prior art has too many processing steps, low working efficiency, and easily generates a large amount of scraps during processing. Utility Model Content

[0004] The purpose of the utility model is to provide a sleeve-shaped film extrusion die head, which can extrude a sleeve-shaped film having a striped area and a smooth area on the inner wall surface. The technical solution adopted is as follows:

[0005] A sleeve-shaped film extrusion die head includes a die head body, the die head body has a discharge port, the discharge port is composed of a die ring, a lower die core, and an upper die core, and an extrusion section of an extrusion flow channel is formed between the lower die core and the die ring, characterized in that: the outer circumferential surface of the lower die core includes a striped curved surface area and a smooth curved surface area, and the striped curved surface area and the smooth curved surface area extend along the circumference of the outer circumferential surface respectively. Since the outer circumferential surface of the lower die core has a striped curved surface area and a smooth curved surface area, the lower die core cooperates with the die ring to extrude a sleeve-shaped film, and its inner surface is partially a striped curved surface and partially a smooth curved surface. Such a sleeve-shaped film can well replace the two films used in the prior art, and can simplify the processing steps, making it easy to complete the packaging of items.

[0006] In a more preferred solution, the striped curved surface area has a plurality of stripes, each of which extends along the axial direction of the lower mold core.

[0007] In a more optimal solution, the striped curved surface area is 45-55% of the outer circumferential surface area of ​​the lower mold core. Such a ratio allows the striped curved surface area to cooperate well with the smooth curved surface area to complete heat sealing.

[0008] In a preferred solution, the die body also includes a diverter die body, which is formed by a diverter die inner layer die body component, a diverter die outer layer die body component, and a diverter die shell which are nested in sequence from the inside to the outside, and the discharge port is installed on the front end surface of the diverter die body.

[0009] In a more preferred solution, the die body further comprises a distributor, which is mounted on the rear end surface of the diversion die body.

[0010] In a more optimal solution, the die body also includes a feed assembly, which is installed on the rear end face of the distributor.

[0011] Compared with the prior art, the beneficial effect of the utility model is that due to the improvement of the lower mold core, the outer circumferential surface is divided into a striped curved surface area and a smooth curved surface area. Therefore, the lower mold core cooperates with the mold ring, and the inner surface of the extruded sleeve-shaped film is partly a striped curved surface and partly a smooth curved surface. The structure is simple and easy to manufacture. The manufactured sleeve-shaped film can well replace the existing two-piece film for packaging articles, can effectively reduce the processing steps, improve work efficiency, and greatly reduce the scraps generated during processing, avoid waste, and reduce the negative impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the lower mold core of the illustrated embodiment;

[0014] Figure 3 yes Figure 2 Left view of the lower mold core;

[0015] Figure 4 yes Figure 3 Enlarged view of area A in the middle. DETAILED DESCRIPTION

[0016] like Figure 1-4As shown, a sleeve-shaped film extrusion die in one embodiment of the present application includes a die body, the die body has a discharge port 1, the discharge port 1 is composed of a die ring 101, a lower die core 102, and an upper die core 103, an extrusion section of an extrusion flow channel is formed between the lower die core 102 and the die ring 101, and the outer circumferential surface 1021 of the lower die core 102 includes a striped curved surface area 10211 and a smooth curved surface area 10212, and the striped curved surface area 10211 and the smooth curved surface area 10212 extend along the circumferential direction of the outer circumferential surface 1021. Since the outer circumferential surface 1021 of the lower die core 102 has the striped curved surface area 10211 and the smooth curved surface area 10212, the lower die core 102 cooperates with the die ring 101, and the inner surface of the extruded sleeve-shaped film is partly a curved surface with stripes, and partly a smooth curved surface. Such a sleeve-shaped film can well replace the two films used in the prior art, and can simplify the processing steps, making it easier to complete the packaging of articles.

[0017] like Figure 2-4 As shown, in one embodiment of the present application, the striped curved surface area 10211 has a plurality of stripes 102111 , and each stripe 102111 extends along the axial direction of the lower mold core 102 .

[0018] like Figure 2-4 As shown, in one embodiment of the present application, all stripes 102111 are parallel to each other.

[0019] The area of ​​the striped curved surface area 10211 is 45-55% of the area of ​​the outer circumferential surface 1021 of the lower mold core 102. Such a ratio allows the striped curved surface area 10211 to cooperate well with the smooth curved surface area 10212 to complete heat sealing.

[0020] like Figure 1-4 As shown, in one embodiment of the present application, the area of ​​the striped curved surface area 10211 is 50% of the area of ​​the outer circumferential surface 1021 of the lower mold core 102 .

[0021] In one embodiment of the present application, the area of ​​the striped curved surface region 10211 is 45% of the area of ​​the outer circumferential surface 1021 of the lower mold core 102 .

[0022] In one embodiment of the present application, the area of ​​the striped curved surface region 10211 is 55% of the area of ​​the outer circumferential surface 1021 of the lower mold core 102 .

[0023] like Figure 1 As shown, in one embodiment of the present application, the die body also includes a diverter die body 2, which is formed by a diverter die inner layer die body assembly 201, a diverter die outer layer die body assembly 202, and a diverter die shell 203 nested in sequence from the inside to the outside, and the discharge port 1 is installed on the front end surface of the diverter die body 2.

[0024] like Figure 1As shown, in one embodiment of the present application, the die body further includes a distributor 3 , and the distributor 3 is installed on the rear end surface of the diversion die body 2 .

[0025] like Figure 1 As shown, in one embodiment of the present application, the die body further includes a feed assembly 4 , and the feed assembly 4 is installed on the rear end surface of the distributor 3 .

[0026] The feed assembly 4, the distributor 3, the flow-dividing die body 2, and the discharge port 1 are sequentially connected to form a die body, and the extrusion flow channel passes through the feed assembly 4, the distributor 3, the flow-dividing die body 2, and the discharge port 1 in sequence.

[0027] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. The technical personnel of the technical field to which the utility model belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A sleeve-shaped film extrusion die head, comprising a die head body, the die head body having a discharge port, the discharge port is composed of a die ring, a lower die core, and an upper die core, and an extrusion section of an extrusion flow channel is formed between the lower die core and the die ring, characterized in that: The outer circumferential surface of the lower mold core includes a striped curved surface area and a smooth curved surface area, and the striped curved surface area and the smooth curved surface area extend along the circumferential direction of the outer circumferential surface respectively.

2. The sleeve-shaped film extrusion die head according to claim 1, characterized in that: The striped curved surface area has a plurality of stripes, and each stripe extends along the axial direction of the lower mold core.

3. The sleeve-shaped film extrusion die head according to claim 2, characterized in that: All stripes are parallel to each other.

4. The sleeve-shaped film extrusion die head according to claim 2 or 3, characterized in that: The area of ​​the striped curved surface region is 45-55% of the area of ​​the outer circumference of the lower mold core.

5. The sleeve-shaped film extrusion die head according to claim 1, characterized in that: The die body also includes a diverter die body, which is formed by sequentially nesting a diverter die inner layer die body component, a diverter die outer layer die body component, and a diverter die shell from the inside to the outside, and the discharge port is installed on the front end surface of the diverter die body.

6. The sleeve-shaped film extrusion die head according to claim 1, characterized in that: The die body also includes a distributor, which is installed on the rear end surface of the diversion die body.

7. The sleeve-shaped film extrusion die head according to claim 1, characterized in that: The die body also includes a feed assembly, which is mounted on the rear end surface of the distributor.

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