Multi-layer co-extrusion molding equipment for transformer composite film insulating material

Abstract

The utility model discloses multi-layer co-extrusion molding equipment for transformer composite film insulating materials, which comprises a co-extrusion molding mixing die, a main runner is arranged in the middle of the interior of the co-extrusion molding mixing die, a first branch runner and a second branch runner are respectively arranged on the upper side of the main runner, and meanwhile, a second pouring gate is arranged at the top of the co-extrusion molding mixing die. A main pouring gate and a first pouring gate are mounted on the surface of the right side wall of the co-extrusion molding mixing mold. According to the multi-layer co-extrusion molding equipment for the transformer composite film insulating material, when three groups of materials flow in the main pouring gate, the first pouring gate and the second pouring gate, the main pouring gate, the first pouring gate and the second pouring gate can be heated through a main heating rod group, a first heating rod group and a second heating rod group respectively; materials in the main pouring gate, the first pouring gate and the second pouring gate cannot be cooled and solidified, and the interiors of the main pouring gate, the first pouring gate and the second pouring gate are not prone to being blocked.

Description

Technical Field

[0001] The utility model relates to the field of co-extrusion dies, in particular to multi-layer co-extrusion molding equipment for transformer composite film insulation materials. Background Art

[0002] Transformer composite film is an insulating material, usually composed of two or more layers of polyester film compounded by a special heat-resistant adhesive; it has good dielectric and mechanical properties and is mainly used for insulation between high and low voltage coils of dry-type transformers;

[0003] When forming the transformer composite film, a multi-layer co-extrusion die is needed for processing and production. The co-extrusion die is a tool in which two or more materials flow along their own independent flow tubes, converge near the die outlet, and extrude the die together;

[0004] When multiple groups of materials are mixed and molded inside a co-extrusion mold, the temperature of the materials inside the mold decreases, causing the fluidity of the materials inside the mold to deteriorate or even solidify, resulting in flow channel blockage. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-layer co-extrusion molding device for transformer composite film insulation materials to solve the defects mentioned in the above background technology.

[0006] To achieve the above-mentioned object, a multi-layer co-extrusion molding device for transformer composite film insulation material is provided, comprising a co-extrusion molding hybrid mold, wherein a main flow channel is provided in the middle of the co-extrusion molding hybrid mold, and a first branch flow channel and a second branch flow channel are provided on the upper side of the main flow channel, and a second gate is installed on the top of the co-extrusion molding hybrid mold, and a main gate and a first gate are installed on the right side wall surface of the co-extrusion molding hybrid mold, the bottom of the second gate is connected to the second branch flow channel, and the bottom of the main gate is connected to the main flow channel, and the bottom of the first gate is connected to the first branch flow channel;

[0007] The main heating rod group, the first heating rod group and the second heating rod group are interspersed and fixed inside the co-extrusion mixing mold.

[0008] Preferably, the first branch flow channel and the second branch flow channel are both arranged in a "V" shape, and the bottoms of the first branch flow channel and the second branch flow channel are connected to the main flow channel, and an extrusion flow channel is arranged at the end of the main flow channel.

[0009] Preferably, a main heating rod group is arranged on the outer side of the main flow channel, a first heating rod group is arranged on the outer side of the first branch flow channel, and a second heating rod group is arranged on the outer side of the second branch flow channel.

[0010] Preferably, the end of the extrusion flow channel is connected to an extrusion space, and the extrusion space is arranged inside the extrusion seat, and the extrusion seat is fixed to the discharge position of the co-extrusion mixing mold.

[0011] Preferably, an upper heat exchange coil is fixedly arranged on the surface of the extrusion seat, and a lower heat exchange coil is fixedly arranged on the bottom surface of the extrusion seat, and the upper heat exchange coil and the lower heat exchange coil are symmetrical structures with respect to the extrusion seat.

[0012] Preferably, the first branch flow channel and the second branch flow channel are both arranged in two groups, and the materials inside the first branch flow channel, the second branch flow channel and the main flow channel are heated by a heating rod group.

[0013] Compared with the prior art, the beneficial effect of the utility model is that when the three groups of materials flow inside the main gate, the first gate and the second gate, the main heating rod group, the first heating rod group and the second heating rod group can be used to heat the main gate, the first gate and the second gate respectively, so that the materials inside the main gate, the first gate and the second gate will not cool and solidify, and the main gate, the first gate and the second gate are not easily blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0015] Figure 2 The utility model structure Figure 1 Rear view of

[0016] Figure 3 The utility model structure Figure 1 Bottom view of

[0017] Figure 4 The utility model structure Figure 1 Top view of the .

[0018] Numbers in the figure: 1. Co-extrusion mixing mold; 2. Main runner; 21. Main gate; 3. First branch runner; 31. First gate; 4. Second branch runner; 41. Second gate; 5. Main heating rod group; 6. First heating rod group; 7. Second heating rod group; 8. Extrusion runner; 9. Extrusion seat; 10. Extrusion space; 11. Upper heat exchange coil; 12. Lower heat exchange coil. DETAILED DESCRIPTION

[0019] See also Figure 1-4The utility model provides a multi-layer co-extrusion molding device for transformer composite film insulation materials, including a co-extrusion molding mixing mold 1, a main flow channel 2 is opened in the middle of the co-extrusion molding mixing mold 1, and a first branch flow channel 3 and a second branch flow channel 4 are respectively opened on the upper side of the main flow channel 2, and a second gate 41 is installed on the top of the co-extrusion molding mixing mold 1, and a main gate 21 and a first gate 31 are installed on the right side wall surface of the co-extrusion molding mixing mold 1, the bottom of the second gate 41 is connected with the second branch flow channel 4, and the bottom of the main gate 21 is connected with the main flow channel 2, and the bottom of the first gate 31 is set with the first branch flow channel 3;

[0020] A main heating rod group 5 , a first heating rod group 6 and a second heating rod group 7 are inserted and fixed inside the co-extrusion mixing mold 1 .

[0021] Working principle: When in use, the three groups of materials enter the main channel 2, the first branch channel 3 and the second branch channel 4 from the main gate 21, the first gate 31 and the second gate 41 in turn, and gather in the extrusion channel 8, and are discharged from the extrusion space 10 inside the extrusion seat 9, completing the multi-layer co-extrusion molding of the entire composite film.

[0022] As a preferred embodiment, the first branch channel 3 and the second branch channel 4 are both arranged in a "V" shape, and the bottoms of the first branch channel 3 and the second branch channel 4 are connected to the main channel 2, and an extrusion channel 8 is arranged at the end of the main channel 2.

[0023] A main heating rod group 5 is arranged outside the main flow channel 2 , a first heating rod group 6 is arranged outside the first branch flow channel 3 , and a second heating rod group 7 is arranged outside the second branch flow channel 4 .

[0024] like Figure 1-4 As shown: when the three groups of materials flow inside the main gate 21, the first gate 31 and the second gate 41, the main heating rod group 5, the first heating rod group 6 and the second heating rod group 7 can be used to heat the main gate 21, the first gate 31 and the second gate 41 respectively, so that the materials inside the main gate 21, the first gate 31 and the second gate 41 will not cool and solidify, and the main gate 21, the first gate 31 and the second gate 41 are not easily blocked.

[0025] As a preferred embodiment, the end of the extrusion flow channel 8 is connected to an extrusion space 10, and the extrusion space 10 is arranged inside the extrusion seat 9, and the extrusion seat 9 is fixedly connected to the discharge position of the co-extrusion mixing mold 1.

[0026] like Figure 1-4As shown: an upper heat exchange coil 11 is fixedly arranged on the surface of the extrusion seat 9, and a lower heat exchange coil 12 is fixedly arranged on the bottom surface of the extrusion seat 9. The upper heat exchange coil 11 and the lower heat exchange coil 12 are symmetrical structures with respect to the extrusion seat 9.

[0027] The upper heat exchange coil 11 and the lower heat exchange coil 12 can cool and solidify the formed product in the extrusion space 10, so that the formed sheet-shaped composite film discharged from the extrusion space 10 is not easily deformed.

[0028] As a preferred implementation, the first branch flow channel 3 and the second branch flow channel 4 are both arranged in two groups, and the materials inside the first branch flow channel 3, the second branch flow channel 4 and the main flow channel 2 are heated by a heating rod group.

[0029] like Figure 1-4 As shown: the materials inside the first branch flow channel 3, the second branch flow channel 4 and the main flow channel 2 are heated by the heating rod group, so that the molten materials inside the three groups of flow channels are in a fluid state and will not solidify inside the flow channels, nor cause blockage of the flow channels.

Claims

1. A transformer composite film insulation material multilayer co-extrusion molding device, comprising a co-extrusion molding mixing mold (1), characterized in that: The co-extrusion molding hybrid mold (1) has a main flow channel (2) in the middle thereof, and a first branch flow channel (3) and a second branch flow channel (4) are respectively provided on the upper side of the main flow channel (2), and a second gate (41) is installed on the top of the co-extrusion molding hybrid mold (1), and a main gate (21) and a first gate (31) are installed on the right side wall surface of the co-extrusion molding hybrid mold (1), the bottom of the second gate (41) is connected to the second branch flow channel (4), and the bottom of the main gate (21) is connected to the main flow channel (2), and the bottom of the first gate (31) is connected to the first branch flow channel (3); A main heating rod group (5), a first heating rod group (6) and a second heating rod group (7) are inserted and fixed inside the co-extrusion mixing mold (1).

2. The transformer composite film insulation material multi-layer co-extrusion molding equipment according to claim 1, characterized in that: The first branch flow channel (3) and the second branch flow channel (4) are both arranged in a "V" shape, and the bottoms of the first branch flow channel (3) and the second branch flow channel (4) are connected to the main flow channel (2), while an extrusion flow channel (8) is arranged at the end of the main flow channel (2).

3. The transformer composite film insulation material multi-layer co-extrusion molding equipment according to claim 1, characterized in that: A main heating rod group (5) is arranged on the outer side of the main flow channel (2), a first heating rod group (6) is arranged on the outer side of the first branch flow channel (3), and a second heating rod group (7) is arranged on the outer side of the second branch flow channel (4).

4. The transformer composite film insulation material multi-layer co-extrusion molding equipment according to claim 2, characterized in that: The end of the extrusion flow channel (8) is connected to an extrusion space (10), and the extrusion space (10) is arranged inside the extrusion seat (9), and the extrusion seat (9) is fixedly connected to the discharge position of the co-extrusion mixing mold (1).

5. The transformer composite film insulation material multi-layer co-extrusion molding equipment according to claim 4, characterized in that: An upper heat exchange coil (11) is fixedly arranged on the surface of the extrusion seat (9), and a lower heat exchange coil (12) is fixedly arranged on the bottom surface of the extrusion seat (9); the upper heat exchange coil (11) and the lower heat exchange coil (12) are symmetrical structures with respect to the extrusion seat (9).

6. The transformer composite film insulation material multi-layer co-extrusion molding equipment according to claim 1, characterized in that: The first branch flow channel (3) and the second branch flow channel (4) are both arranged in two groups, and the materials inside the first branch flow channel (3), the second branch flow channel (4) and the main flow channel (2) are heated by a heating rod group.

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