Punching die structure for PTFE (Polytetrafluoroethylene) rubber-coated molded product

Abstract

The utility model relates to the technical field of cutting die structures, and discloses a PTFE (Polytetrafluoroethylene) rubber-coated molded product punching die structure, an upper positioning plate is arranged above a hardening punching tool bit plate, the hardening punching tool bit plate is connected with the upper positioning plate, a lower positioning plate is arranged below a nylon punching die cushion, the nylon punching die cushion is connected with the lower positioning plate, and the nylon punching die cushion is connected with the lower positioning plate. Vacuum blowing ports are formed in the hardening punching tool bit plate and the nylon punching die cushion, blowing channels are formed in the hardening punching tool bit plate and the nylon punching die cushion, blowing connectors are formed in the side face of the hardening punching tool bit plate and the side face of the nylon punching die cushion, and the blowing connectors are communicated with the vacuum blowing ports through the blowing channels. A guiding and limiting assembly is arranged on the lower end face of the hardening punching tool bit plate and used for guiding and limiting the opening and closing directions of the hardening punching tool bit plate and the nylon punching die cushion. The punching device has the advantages that products can be rapidly and neatly punched, the yield is increased, and excess materials can be rapidly cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting die structures, in particular to a cutting die structure for a PTFE overmolded product. Background Art

[0002] PTFE-coated rubber products are widely used and are often used in electronic appliances, power equipment, computers, automobiles, communications and other industries. The main characteristics of PTFE-coated rubber products are high and low temperature resistance, corrosion resistance, and low friction coefficient.

[0003] Existing coolant circulation impeller products used in battery temperature control systems in the field of new energy vehicles are prone to the following problems when punching and cutting dies:

[0004] 1. The product is prone to burrs / brushing after punching;

[0005] 2. The inside and outside cannot be punched at the same time. The inner hole and the outer burr must be punched separately;

[0006] 3. Punching is prone to deviation;

[0007] 4. It is easy to cause creases, whitening and depressions on the product, causing the impeller to function poorly or fail;

[0008] 5. The blade of conventional punching die for punching PTFE-coated rubber products wears quickly and the punching is continuous. Utility Model Content

[0009] 1. Technical Problems Solved

[0010] The technical problem to be solved by the utility model is that the existing punching die structure cannot punch products quickly and smoothly, and the yield rate is not high.

[0011] 2. Technical Solution

[0012] In order to solve the above technical problems, the utility model provides the following technical solutions: a PTFE overmolded product punching die structure, comprising a hardened punching cutter head plate and a nylon punching die pad, wherein a hardened punching cutter head plate is arranged above the nylon punching die pad.

[0013] An upper positioning plate is provided above the hardened punching cutter head plate, the hardened punching cutter head plate is connected to the upper positioning plate, a lower positioning plate is provided below the nylon punching die pad, the nylon punching die pad is connected to the lower positioning plate, vacuum blowing ports are provided on the hardened punching cutter head plate and the nylon punching die pad, blowing channels are provided in the hardened punching cutter head plate and the nylon punching die pad, blowing interfaces are provided on the sides of the hardened punching cutter head plate and the nylon punching die pad, and the blowing interfaces are connected to the vacuum blowing ports through the blowing channels;

[0014] A guide and limit assembly is provided on the lower end surface of the hardened punching cutter head plate, and the guide and limit assembly guides and limits the opening and closing directions of the hardened punching cutter head plate and the nylon punching die pad.

[0015] Furthermore, the guide limit assembly includes a positioning column and a limit column. Positioning columns are provided at the four corners of the lower end surface of the hardened punching head plate. A limit column is provided on the inner side of the positioning column of the lower end surface of the hardened punching head plate. A positioning pin hole is provided at the upper end surface of the nylon punching die pad corresponding to the position of the positioning column, and the positioning column is slidably connected to the positioning pin hole.

[0016] Furthermore, the hardened punching cutter head plate is connected to the upper positioning plate by bolts, and the nylon punching die pad is connected to the lower positioning plate by bolts.

[0017] Furthermore, a buffer pad is provided at the center of the upper end surface of the nylon punching die pad.

[0018] Furthermore, an air blowing sealing groove is provided on the outer side of the air blowing passage of the lower end surface of the hardened punching tool head plate and the nylon punching die pad.

[0019] 3. Beneficial Effects

[0020] The advantages of the utility model compared with the prior art are:

[0021] The guide and limit assembly guides and limits the opening and closing directions of the hardened punching cutter head plate and the nylon punching die pad, making the punching efficiency higher, effectively protecting the punching die edge and extending the service life, and making the quality of the obtained products more stable; the vacuum blowing port cleans the die and the cutter head to ensure subsequent normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the hardened punching cutter head plate of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the nylon punching die pad of the utility model.

[0024] Figure 3 It is a structural schematic diagram of the back side of the hardened punching cutter head plate of the utility model.

[0025] Figure numerals: 1. Hardened punching cutter head plate, 2. Nylon punching die pad, 3. Upper positioning plate, 4. Lower positioning plate, 5. Vacuum blowing port, 6. Blowing channel, 7. Blowing interface, 8. Positioning column, 9. Limiting column, 10. Positioning pin hole, 11. Buffer pad, 12. Blowing sealing groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0027] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] The utility model will now be further described in conjunction with the accompanying drawings.

[0031] Embodiment 1

[0032] Combined with Figure 1-3 A guide and limit assembly is provided on the lower end surface of the hardened punching head plate 1, and the guide and limit assembly guides and limits the opening and closing directions of the hardened punching head plate 1 and the nylon punching die pad 2. The guide and limit assembly includes a positioning column 8 and a limit column 9. Positioning columns 8 are provided at the four corners of the lower end surface of the hardened punching head plate 1, and a limit column 9 is provided on the inner side of the positioning column 8 of the lower end surface of the hardened punching head plate 1. A positioning pin hole 10 is provided at the upper end surface of the nylon punching die pad 2 corresponding to the position of the positioning column 8, and the positioning column 8 is slidably connected to the positioning pin hole 10.

[0033] After special treatment, the PTFE surface is coated with glue, cut to the corresponding size, placed in the mold, placed on the rubber, placed in the vulcanizing molding machine for vulcanization molding, and the semi-finished product is obtained after molding. The semi-finished product is placed between the hardened punching head plate 1 and the nylon punching die pad 2. The hardened punching head plate 1 moves toward the nylon punching die pad 2, the positioning column guides the movement direction of the hardened punching head plate 1, and the limit column limits the movement distance of the hardened punching head plate 1, so that the hardened punching head plate 1 can quickly and thoroughly punch the product.

[0034] Combined with Figure 1-3 An upper positioning plate 3 is provided above the hardened punching tool head plate 1, and the hardened punching tool head plate 1 is connected to the upper positioning plate 3. A lower positioning plate 4 is provided below the nylon punching die pad 2, and the nylon punching die pad 2 is connected to the lower positioning plate 4. Vacuum blowing ports 5 are provided on the hardened punching tool head plate 1 and the nylon punching die pad 2. Blowing channels 6 are provided in the hardened punching tool head plate 1 and the nylon punching die pad 2. Blowing interfaces 7 are provided on the sides of the hardened punching tool head plate 1 and the nylon punching die pad 2, and the blowing interfaces 7 are connected to the vacuum blowing ports 5 through the blowing channels 6.

[0035] After the punching is completed, air is blown into the air channel 6 through the air blowing interface 7, and the vacuum air blowing port 5 connected to the air channel 6 is used to blow away the residual material to ensure the normal progress of the subsequent processes.

[0036] Embodiment 2

[0037] Combined with Figure 1-3 The hardened punching tool head plate 1 is connected to the upper positioning plate 3 by bolts, and the nylon punching die pad 2 is connected to the lower positioning plate 4 by bolts. A buffer pad 11 is provided at the center of the upper end surface of the nylon punching die pad 2, and a blowing sealing groove 12 is provided on the outer side of the blowing channel 6 of the lower end surface of the hardened punching tool head plate 1 and the nylon punching die pad 2.

[0038] On the basis of the first embodiment, the hardened punching cutter head plate 1 and the upper positioning plate 3, and the nylon punching die pad 2 and the lower positioning plate 4 can be freely disassembled and assembled for easy maintenance and replacement. The buffer pad 11 is made of high-hardness fluororubber material. The fluororubber pad can play a good buffering role against the wear of the blade. When the punching fluororubber pad is damaged, a new rubber pad can be replaced to reduce the cost of directly repairing the die and extend the service life of the die. The air sealing groove 12 ensures that the gas transported by the air duct 6 will not leak.

[0039] The utility model and its implementation are described, and such description is not restrictive. The drawings are only one of the implementations of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and implementation example similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A punching die structure for a PTFE overmolded product, comprising a hardened punching die head plate (1) and a nylon punching die pad (2), wherein a hardened punching die head plate (1) is arranged above the nylon punching die pad (2), and characterized in that: An upper positioning plate (3) is provided above the hardened punching tool head plate (1), and the hardened punching tool head plate (1) is connected to the upper positioning plate (3); a lower positioning plate (4) is provided below the nylon punching die pad (2), and the nylon punching die pad (2) is connected to the lower positioning plate (4); vacuum blowing ports (5) are provided on the hardened punching tool head plate (1) and the nylon punching die pad (2); blowing channels (6) are provided inside the hardened punching tool head plate (1) and the nylon punching die pad (2); blowing interfaces (7) are provided on the sides of the hardened punching tool head plate (1) and the nylon punching die pad (2); the blowing interfaces (7) are connected to the vacuum blowing ports (5) through the blowing channels (6); The lower end surface of the hardened punching cutter head plate (1) is provided with a guide and limit assembly, and the guide and limit assembly guides and limits the opening and closing directions of the hardened punching cutter head plate (1) and the nylon punching die pad (2).

2. A PTFE overmolding product punching die structure according to claim 1, characterized in that: The guide limit assembly comprises a positioning column (8) and a limit column (9); the positioning columns (8) are arranged at the four corners of the lower end surface of the hardened punching head plate (1); the limit column (9) is arranged inside the positioning column (8) on the lower end surface of the hardened punching head plate (1); a positioning pin hole (10) is arranged at a position corresponding to the position of the positioning column (8) on the upper end surface of the nylon punching die pad (2); and the positioning column (8) is slidably connected to the positioning pin hole (10).

3. A PTFE overmolding product punching die structure according to claim 1, characterized in that: The hardened punching cutter head plate (1) is connected to the upper positioning plate (3) via bolts, and the nylon punching die pad (2) is connected to the lower positioning plate (4) via bolts.

4. A PTFE overmolding product punching die structure according to claim 1, characterized in that: A buffer pad (11) is provided at the center of the upper end surface of the nylon punching die pad (2).

5. A PTFE overmolding product punching die structure according to claim 1, characterized in that: The outer sides of the air blowing passages (6) on the lower end surfaces of the hardened punching tool head plate (1) and the nylon punching die pad (2) are provided with air blowing sealing grooves (12).

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