Extrusion die for producing gear-shaped heat-shrinkable sleeve

Abstract

The utility model discloses an extrusion die for producing a gear-shaped heat-shrinkable sleeve, which relates to the technical field of forming dies and comprises an external die sleeve, a fixed plate fixed on a connecting frame, a spring fixed on the fixed plate, a movable plate fixed on the spring, a guide shaft connected with a guide groove, and a fixed block and a strip-shaped rod fixed on the forming die, a supporting block connected with the threaded rod is fixed to the annular plate. When sleeves of different models need to be extruded and a guide shaft is not arranged on an external die sleeve, a pulled connecting disc drives the guide shaft to enable a movable plate to compress a spring, meanwhile, an adjusting plate is rotated to enable a forming head to drive a connecting frame to rotate other structures on the connecting frame, the guide shaft is in contact with the front wall of the external die sleeve, and the connecting disc is loosened; the guide shaft is in contact sliding with the front wall of the external die sleeve until the guide shaft slides to be in contact with the guide groove, the guide shaft is inserted into the guide groove, and at the moment, the forming head is aligned with the external die sleeve; alignment connection of the positioning bolts and the positioning holes is facilitated, and the alignment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molding dies, in particular to an extrusion die for producing a gear-shaped heat shrinkable sleeve. Background Art

[0002] Heat shrink tubing is a special type of insulating material, mainly used for insulation protection of wires, cables and wire terminals. Heat shrink tubing is an important electrical insulation material. It is widely used in the electronics and electrical industries. It not only provides protection, but also helps to improve the safety and reliability of products. The production of heat shrink tubing adopts a positive pressure expansion process to extrude the raw materials through a molding die for continuous production.

[0003] Chinese patent CN217573988U discloses an extrusion molding die for processing heat shrinkable sleeves, which relates to the technical field of molding dies, including an external mold sleeve, a conical mold sleeve is provided inside the external mold sleeve, a connecting groove is opened at one end of the conical mold sleeve, an adjustment plate is provided on the front of the external mold sleeve, and the adjustment plate is movably connected to the external mold sleeve, a molding head is provided on the surface array of the adjustment plate, an inner core is provided inside the molding head, and the inner core is threadedly connected to the connecting groove, and molding heads of different types are arranged around the adjustment plate. When it is necessary to extrude heat shrinkable sleeves of different types, it is only necessary to rotate the adjustment plate to align and fix the corresponding molding head with the external mold sleeve, and then connect the corresponding inner core to the conical mold sleeve. This design makes it convenient and quick to replace the molding head of the mold, saves time, and improves processing efficiency.

[0004] In the above patent, when replacing the forming head, it is necessary to align it with the external mold sleeve, that is, it is necessary to align the positioning bolts and the positioning holes to fix the forming head. However, it is inconvenient to find the alignment position when the positioning bolts and the positioning holes are connected, and the alignment efficiency is low. Utility Model Content

[0005] The utility model aims to provide an extrusion die for producing a gear-shaped heat shrinkable sleeve to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an extrusion die for producing gear-shaped heat shrinkable sleeves, comprising: an external die sleeve, a forming head is provided on the front side of the external die sleeve, an annular plate is fixed on the inner wall of the forming head, a connecting frame located in front of the external die sleeve is horizontally fixed to the outer wall of the forming head, a fixing plate is fixed to the inner wall of the front end of the connecting frame, a spring is horizontally fixed to the rear wall of the fixing plate, a movable plate slidably connected to the inner wall of the connecting frame is fixed to the rear end of the spring, a guide shaft slidably connected to the fixing plate and movably connected to a guide groove horizontally opened on the front wall of the external die sleeve is horizontally fixed to the movable plate, a sealing gasket movably connected to the forming die is fixed to the inner wall of the annular plate, a fixing block is fixed to the front end wall of the forming die, a plurality of strip rods are horizontally fixed to the inner wall of the forming die, a support block threadedly connected to the threaded rod is fixed to the front wall of the annular plate, and the threaded rod and the fixing block correspond to each other.

[0007] Furthermore, the cross section of the connection frame is in the shape of a U-shaped letter "H", the spring is located in the connection frame, the spring is sleeved on the outside of the guide shaft, and a connection disk located in front of the connection frame is fixed to the front wall of the guide shaft.

[0008] Furthermore, a limiting groove slidably connected to the limiting block is horizontally opened on the rear end side wall of the connection frame, the limiting groove passes through the inner wall of the connection frame, and the limiting block and the side wall of the movable plate are fixedly connected.

[0009] Furthermore, the inner wall of the molding die is provided with six strip-shaped bars, and the six strip-shaped bars are spaced sixty degrees apart from each other.

[0010] Furthermore, the forming mold is provided with four fixing blocks, and the four fixing blocks are ninety degrees apart.

[0011] Furthermore, the annular plate is provided with four support blocks, the four support blocks are ninety degrees apart, and there is a one-to-one correspondence between the support blocks and the fixed blocks.

[0012] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0013] 1. The utility model is that when it is necessary to extrude heat shrink sleeves of different types, when the guide shaft on the molding head of the required type is not on the external mold sleeve, the connecting plate is first pulled forward, and the connecting plate drives the guide shaft to slide on the fixed plate, and the guide shaft drives the movable plate to slide on the inner wall of the connecting frame at the same time, and the movable plate compresses the spring, and at the same time, the molding head is rotated by rotating the adjusting plate, and the molding head drives the connecting frame to rotate, and the connecting frame drives other structures thereon, and when the guide shaft contacts the front wall of the external mold sleeve, the connecting plate is released, and the guide shaft is restored to the original position direction under the action of the spring, and when the guide shaft is restored to contact with the front wall of the external mold sleeve, the spring is still in a compressed state, and when the adjusting plate continues to be rotated, the guide shaft slides on the front wall of the external mold sleeve, because the guide groove is in the active track of the guide shaft, until the guide shaft slides to contact with the guide groove, at this time, under the action of the spring, the compressed state of the spring is released, and the guide shaft is inserted into the guide groove, and at this time, the molding head is aligned with the external mold sleeve, and then the molding head is fixed by the positioning bolt; it is convenient to align and connect the positioning bolt and the positioning hole, and the alignment efficiency is improved;

[0014] 2. The utility model sets a molding die, and the strip rod on the inner wall of the molding die can be set according to the required shape of the outer wall of the sleeve, so that it becomes one with the molding die. When the required molding die needs to be replaced, the threaded rod is rotated in the support block and moved outward to separate the threaded rod and the fixed block, the molding die is removed, the required molding die is placed in the sealing gasket, and the threaded rod is twisted in the opposite direction to make it abut against the fixed block to fix the molding die, thereby realizing that the required shape of the outer wall of the sleeve can be extruded. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic top view of the front structure of the utility model;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0018] Figure 3 This utility model Figure 1 A schematic diagram of the structure of the middle B region;

[0019] Figure 4 This is a schematic diagram of the internal structure connection of the connection frame of the utility model;

[0020] In the figure: 1. external mold sleeve; 2. forming head; 3. annular plate; 4. forming mold; 5. strip rod; 6. sealing gasket; 7. fixing block; 8. threaded rod; 9. support block; 10. connecting frame; 11. guide shaft; 12. connecting plate; 13. guide groove; 14. fixing plate; 15. movable plate; 16. spring; 17. limit block; 18. limit groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4, the present utility model provides a technical solution: an extrusion die for producing gear-shaped heat shrinkable sleeves, comprising: an external die sleeve 1, a forming head 2 is provided on the front side of the external die sleeve 1. When the guide shaft 11 on the replaced forming head 2 is not on the external die sleeve 1, the connecting plate 12 on the forming head 2 can be first pulled to pass through the guide groove 13. An annular plate 3 is fixed to the inner wall of the forming head 2. A connecting frame 10 is horizontally fixed to the outer wall of the forming head 2 and is located in front of the external die sleeve 1. A fixing plate 14 is fixed to the inner wall of the front end of the connecting frame 10. A spring 16 is horizontally fixed to the rear wall of the fixing plate 14. The rear end of the spring 16 is fixed to a movable plate 15 that is slidably connected to the inner wall of the connecting frame 10. A guide shaft 11 that is slidably connected to the fixing plate 14 and is movably connected to the guide groove 13 horizontally opened on the front wall of the external die sleeve 1 is horizontally fixed to the movable plate 15. The cross-section of the connecting frame 10 is in a square shape with a hole in the middle. The spring 16 is located inside the connecting frame 10 and is sleeved on the outside of the guide shaft 11. A connecting plate 12 located in front of the connecting frame 10 is fixed to the front wall of the guide shaft 11, which is convenient for pulling the guide shaft 11. A limiting groove 18 that is slidably connected to the limiting block 17 is horizontally opened on the rear side wall of the connecting frame 10. The limiting groove 18 penetrates the inner wall of the connecting frame 10. The limiting block 17 is fixedly connected to the side wall of the movable plate 15. The movement of the limiting block 17 and the limiting groove 18 can make the movable plate 15 move more stably and can also control the movement range of the movable plate 15. A sealing gasket 6 that is movably connected to the forming die 4 is fixed to the inner wall of the annular plate 3. The sealing gasket 6 can improve the sealing performance of the connection. A fixing block 7 is fixed to the front end wall of the forming die 4. Four fixing blocks 7 are provided on the forming die 4, and the four fixing blocks 7 are ninety degrees apart from each other. A plurality of strip-shaped rods 5 are horizontally fixed to the inner wall of the forming die 4. Six strip-shaped rods 5 are provided on the inner wall of the forming die 4, and the six strip-shaped rods 5 are sixty degrees apart from each other. The required shape can be added to the inner wall of the forming die 4, so that the required纹路 on the outer wall of the sleeve can be extruded. For example, by providing the strip-shaped rods 5, a gear-shaped heat shrinkable sleeve can be extruded. The sleeve of this shape can increase friction and thus prevent slipping. A support block 9 that is threadedly connected to the threaded rod 8 is fixed to the front wall of the annular plate 3. Four support blocks 9 are provided on the annular plate 3, and the four support blocks 9 are ninety degrees apart from each other. The support blocks 9 and the fixing blocks 7 correspond to each other one by one. The threaded rod 8 and the fixing block 7 correspond to each other. When the threaded rod 8 rotates and moves in the opposite direction of the fixing block 7, the threaded rod 8 and the fixing block 7 are abutted against each other to form the fixation of the forming die 4.

[0023] The working principle of the present utility model:

[0024] Refer to the attached drawings of the specification Figure 1-4When it is necessary to extrude heat shrinkable sleeves of different types, when the guide shaft 11 on the molding head 2 of the required type is not on the external mold sleeve 1, first pull the connecting plate 12 forward, the connecting plate 12 drives the guide shaft 11 to slide on the fixed plate 14, and the guide shaft 11 drives the movable plate 15 to slide on the inner wall of the connecting frame 10 at the same time, and the movable plate 15 compresses the spring 16, and at the same time, the molding head 2 is rotated by rotating the adjustment plate, and the molding head 2 drives the connecting frame 10 to rotate, and the connecting frame 10 drives other structures thereon. When the guide shaft 11 contacts the front wall of the external mold sleeve 1, release the connecting plate 12, and under the action of the spring 16, the guide shaft 11 is restored to the original position. When the guide shaft 11 returns to contact the front wall of the external mold sleeve 1, the spring 16 is still in In the compressed state, when the adjustment plate continues to be rotated, the guide shaft 11 slides on the front wall of the external mold sleeve 1. Since the guide groove 13 is in the active trajectory of the guide shaft 11, until the guide shaft 11 slides to contact with the guide groove 13, under the action of the spring 16, the compressed state of the spring 16 is released, and the guide shaft 11 is inserted into the guide groove 13. At this time, the molding head 2 is aligned with the external mold sleeve 1, and then the molding head 2 is fixed by the positioning bolt; when it is necessary to produce a gear-shaped heat shrink sleeve, the molding mold 4 with the strip rod 5 is placed in the sealing gasket 6, and the threaded rod 8 is rotated in the support block 9 so that the threaded rod 8 is pressed against the fixing block 7 to fix the molding mold 4; then the sleeve is processed; it is convenient to align and connect the positioning bolts and the positioning holes, and improve the alignment efficiency.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An extrusion die for producing a gear-shaped heat shrinkable sleeve, comprising: The outer mold sleeve (1) is provided with a molding head (2) at the front side of the outer mold sleeve (1), and an annular plate (3) is fixed to the inner wall of the molding head (2), characterized in that: a connecting frame (10) located in front of the outer mold sleeve (1) is horizontally fixed to the outer wall of the molding head (2), a fixing plate (14) is fixed to the inner wall of the front end of the connecting frame (10), a spring (16) is horizontally fixed to the rear wall of the fixing plate (14), a movable plate (15) slidably connected to the inner wall of the connecting frame (10) is fixed to the rear end of the spring (16), and the movable plate (15) is horizontally fixed A guide shaft (11) is slidably connected to a fixed plate (14) and movably connected to a guide groove (13) horizontally opened on the front wall of an external mold sleeve (1); a sealing gasket (6) movably connected to a forming mold (4) is fixed to the inner wall of the annular plate (3); a fixing block (7) is fixed to the front end wall of the forming mold (4); a plurality of strip rods (5) are horizontally fixed to the inner wall of the forming mold (4); a supporting block (9) threadedly connected to a threaded rod (8) is fixed to the front wall of the annular plate (3); and the threaded rod (8) and the fixing block (7) correspond to each other.

2. The extrusion die for producing a gear-shaped heat shrinkable sleeve according to claim 1, characterized in that: The cross section of the connection frame (10) is in the shape of a Chinese character "Yu". The spring (16) is located in the connection frame (10). The spring (16) is sleeved on the outside of the guide shaft (11). A connection plate (12) located in front of the connection frame (10) is fixed to the front wall of the guide shaft (11).

3. The extrusion die for producing a gear-shaped heat shrinkable tube according to claim 1, characterized in that: A limiting groove (18) slidably connected to the limiting block (17) is horizontally opened on the rear end side wall of the connection frame (10); the limiting groove (18) penetrates the inner wall of the connection frame (10); and the limiting block (17) and the side wall of the movable plate (15) are fixedly connected.

4. The extrusion die for producing a gear-shaped heat shrinkable tube according to claim 1, characterized in that: There are six strip-shaped rods (5) arranged on the inner wall of the forming mold (4), and the six strip-shaped rods (5) are spaced sixty degrees apart from each other.

5. The extrusion die for producing a gear-shaped heat shrinkable tube according to claim 1, characterized in that: The molding die (4) is provided with four fixing blocks (7), and the four fixing blocks (7) are spaced 90 degrees apart from each other.

6. The extrusion die for producing a gear-shaped heat shrinkable tube according to claim 1, characterized in that: Four support blocks (9) are arranged on the annular plate (3), the four support blocks (9) are spaced 90 degrees apart from each other, and there is a one-to-one correspondence between the support blocks (9) and the fixed blocks (7).

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