Dual-purpose butt joint mold for sealing strip EPDM rubber sheet and rubber cement

Abstract

The invention relates to a sealing strip EPDM (Ethylene-Propylene-Diene Monomer) rubber sheet and rubber cement dual-purpose butt joint mold which comprises cold mold pressing molds and hot mold heating molds, the cold mold pressing molds are symmetrically arranged, and the two symmetrical hot mold heating molds are arranged between the cold mold pressing molds; according to the method, the phenomena of part appearance bruising, coating scalding and cracking caused by a hot mold are improved, the appearance state of a joint is improved, and the problem of technological limitation of an old mold is solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, in particular to a dual-purpose butt-jointing mold for sealing strip EPDM film and adhesive. Background Art

[0002] The existing butt joint molds rely on anti-slip teeth or mold molds for compaction. Due to the high temperature of the mold, the assembly position of the parts will be embossed, crushed and the coating will be burned. The mold compaction cannot better absorb the fluctuation of the extrusion section, which will cause the joint to be crushed and cracked. Therefore, there is an urgent need for a mold to solve how to better compact the mold under the condition of section fluctuation, and solve the problems of embossing, coating burns and cracking. Summary of the invention

[0003] Aiming at the problems of embossing, coating burns and cracking caused by compression during parts jointing, a dual-purpose butt joint mold for sealing strip EPDM film and adhesive was proposed.

[0004] The technical solution of the present invention is: a dual-purpose butt joint mold for sealing strip EPDM film and glue, including a cold mold pressing mold and a hot mold heating mold, the cold mold pressing mold is symmetrically arranged, and two symmetrical hot mold heating molds are arranged between the cold mold pressing molds.

[0005] Preferably, the cold mold pressing mold comprises a cold mold upper mold and a cold mold lower mold; the bottom of the cold mold upper mold is provided with a cold mold upper mold cavity, and the top of the cold mold lower mold is provided with a cold mold lower mold cavity.

[0006] Preferably, the cold mold lower model is provided with a cold mold slider near the cold mold lower model cavity.

[0007] Preferably, the hot mold heating mold comprises a hot mold upper model and a hot mold lower model; a hot mold upper model cavity is provided at the bottom of the hot mold upper model, and a hot mold lower model cavity is provided at the top of the hot mold lower model.

[0008] Preferably, a hot mold slider is provided on the hot mold lower model near the hot mold lower model cavity.

[0009] Preferably, knife edges are provided around the upper mold cavity of the hot mold and the lower mold cavity of the hot mold.

[0010] Preferably, an upper anti-collision buffer structure is provided at the collision position on the upper side of the blade of the upper mold of the hot mold.

[0011] Preferably, a lower anti-collision buffer structure is provided at the collision position on the lower side of the blade of the lower mold of the hot mold.

[0012] The beneficial effects of the present invention are as follows: the present invention improves the phenomenon of appearance crushing of parts, scalding of coatings and cracking caused by hot molds, improves the appearance of joints, and solves the problem of limitations of old mold technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A three-dimensional diagram of a dual-purpose butt joint mold for the sealing strip EPDM film and the adhesive of the present invention;

[0014] Figure 2 This is a schematic diagram of the cold mold pressing mold of the present invention;

[0015] Figure 3 This is a schematic diagram of the heating mold and the position of the knife edge of the hot mold of the present invention;

[0016] Figure 4 This is a schematic diagram of a hot mold heating mold of the present invention;

[0017] Figure 5 It is a side view of the dual-purpose butt joint mold of the sealing strip EPDM film and the glue of the present invention.

[0018] In the figure, the component names corresponding to the reference numerals are as follows:

[0019] 1. Cold mold pressing mold; 11. Cold mold upper model; 111. Cold mold upper model cavity; 12. Cold mold lower model; 121. Cold mold lower model cavity; 13. Cold mold slider; 2. Hot mold heating mold; 21. Hot mold upper model; 211. Hot mold upper model cavity; 212. Upper anti-collision buffer structure; 22. Hot mold lower model; 221. Hot mold lower model cavity; 222. Lower anti-collision buffer structure; 23. Hot mold slider; 24. Knife edge. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0021] refer to Figure 1 As shown, the present invention provides a dual-purpose butt joint mold for sealing strip EPDM film and adhesive, comprising a cold mold pressing mold 1 and a hot mold heating mold 2, the cold mold pressing mold 1 is symmetrically arranged, and two symmetrical hot mold heating molds 2 are arranged between the cold mold pressing mold 1;

[0022] refer to Figure 2 , 5As shown, the cold mold pressing mold 1 includes a cold mold upper model 11 and a cold mold lower model 12. A plurality of cold mold upper model cavities 111 are provided at the bottom of the cold mold upper model 11. The size of the cold mold upper model cavity 111 is smaller than the size of the part. In this example, the cold mold upper model cavity 111 is designed to be 1.5mm smaller than the part. A plurality of cold mold lower model cavities 121 are provided at the top of the cold mold lower model 12. A plurality of cold mold sliders 13 are provided on the cold mold lower model 12 near the cold mold lower model cavity 121, so that after the part is loaded into the mold, when the mold is pressed down and tightened, the cold mold slider 13 applies a lateral force to press the bayonet position of the cold mold lower model 12, and after the upper model 11 is pressed down, the part is pressed up and down, so that the part will not be at risk of retreating during the left and right mold closing process of the mold. After the mold is opened, the cold mold slider 13 rebounds, and the part is convenient to take out.

[0023] refer to Figure 3 , 4 As shown, the hot mold heating mold 2 includes a hot mold upper model 21 and a hot mold lower model 22. The bottom of the hot mold upper model 21 is provided with a plurality of hot mold upper model cavities 211, and the top of the hot mold lower model 22 is provided with a plurality of hot mold lower model cavities 221. A plurality of hot mold sliders 23 are provided on the hot mold lower model 22 near the hot mold lower model cavities 221. After the mold is opened, the hot mold sliders 23 retreat to improve the mold removal efficiency. The size of the hot mold upper model cavity 211 is larger than the size of the part. In this example, the hot mold upper model cavity 211 is 0. 3mm design, to prevent the secondary vulcanization of the parts during the heating vulcanization process, which may cause the foam of the parts to swell, resulting in foam pressure and coating burns; the size of the hot mold lower model cavity 221 is larger than the size of the parts. In this example, the hot mold lower model cavity 221 is designed to be 0.2mm larger than the part to prevent the part from being difficult to install due to fluctuations in the extrusion section of the parts; the tooth part of the hot mold lower model cavity 221 is designed to be 1:1 with the part to avoid the risk of cracking caused by the dislocation of the tooth position of the part due to the force of the lateral hot mold slider 23;

[0024] A knife edge 24 is provided around the upper mold cavity 211 of the hot mold and the lower mold cavity 221 of the hot mold, so that the excess film can be cut off after the mold collides, the trimming efficiency is improved, the appearance quality is ensured, and the appearance defects caused by manual tearing and the risk of trimming leakage are reduced; an upper anti-collision buffer structure 212 is provided at the upper collision position of the knife edge 24 of the upper mold 21 of the hot mold, and a lower anti-collision buffer structure 222 is provided at the lower collision position of the knife edge 24 of the lower mold 22 of the hot mold. The position of the knife edge 24 adopts an anti-collision buffer design to prevent the mold knife edge 24 from being deformed and worn due to the number of collisions;

[0025] The beneficial effects are as follows: the present invention improves the phenomenon of parts appearance crushing, coating scalding and cracking caused by hot molds, improves the appearance of joints, and solves the problem of limitations of old mold technology.

[0026] It should be noted that the orientations or positional relationships indicated by the above-mentioned terms "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. "Multiple" means two or more. "Installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection.

[0027] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dual-purpose butt joint mold for sealing strip EPDM film and glue, characterized in that: It comprises a cold mold pressing mold (1) and a hot mold heating mold (2); the cold mold pressing mold (1) is symmetrically arranged, and two symmetrical hot mold heating molds (2) are arranged between the cold mold pressing mold (1).

2. According to claim 1, the dual-purpose butt joint mold for sealing strip EPDM film and glue is characterized in that: The cold mold pressing mold (1) comprises a cold mold upper mold (11) and a cold mold lower mold (12); a cold mold upper mold cavity (111) is provided at the bottom of the cold mold upper mold (11), and a cold mold lower mold cavity (121) is provided at the top of the cold mold lower mold (12).

3. According to claim 2, the dual-purpose butt joint mold for sealing strip EPDM film and glue is characterized in that: The cold mold lower mold (12) is provided with a cold mold slider (13) near the cold mold lower mold cavity (121).

4. According to claim 1, the dual-purpose butt joint mold for sealing strip EPDM film and glue is characterized in that: The hot mold heating mold (2) comprises a hot mold upper mold (21) and a hot mold lower mold (22); a hot mold upper mold cavity (211) is provided at the bottom of the hot mold upper mold (21), and a hot mold lower mold cavity (221) is provided at the top of the hot mold lower mold (22).

5. According to claim 4, the dual-purpose butt joint mold for sealing strip EPDM film and glue is characterized in that: The hot mold lower mold (22) is provided with a hot mold slider (23) near the hot mold lower mold cavity (221).

6. The dual-purpose butt joint mold for sealing strip EPDM film and glue according to claim 5 is characterized in that: A knife edge (24) is provided around the upper mold cavity (211) of the hot mold and the lower mold cavity (221) of the hot mold.

7. The dual-purpose butt joint mold for sealing strip EPDM film and glue according to claim 6 is characterized in that: An upper anti-collision buffer structure (212) is provided at the upper collision position of the knife edge (24) of the hot mold upper model (21).

8. The dual-purpose butt joint mold for sealing strip EPDM film and glue according to claim 7 is characterized in that: A lower anti-collision buffer structure (222) is provided at the collision position on the lower side of the blade (24) of the hot mold lower model (22).

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