Punching die for rubber product production

Abstract

The utility model discloses a stamping die for rubber product production. The stamping die comprises an upper die and a lower die capable of sliding in the height direction relative to the upper die. A plurality of upper punches which are arranged at intervals and face the lower die are fixedly mounted on the upper die; the lower die is fixedly provided with a plurality of lower punches which are arranged at intervals and face the upper die, the lower die is further provided with a limiting plate located between the upper punches and the lower punches, all the lower punches can slide in the height direction relative to the limiting plate, and the limiting plate is provided with a plurality of through holes which are arranged at intervals; and in a mold closing state, the upper punch and the lower punch are both inserted into the corresponding through holes. The upper punch and the lower punch are arranged, a double-punch structure is adopted to replace an original single-punch structure, the stroke of the single punch is shortened, the machining precision of the deep hole structure is improved, the problem that the original machining quality is poor is solved, the yield is improved, and therefore the machining efficiency is improved, and the product machining quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a punching die for producing rubber products. Background Technology

[0002] A punch die, also known as a forming die, is mainly used for heating and molding rubber products. Specifically, in the rubber product manufacturing process, the product to be processed is placed into a die, an external drive device drives the die to close, and then the product to be processed is heated and molded to form a rubber product.

[0003] For rubber products with perforated structures, molds are generally equipped with punches for forming. See patent document CN2020225552581, which discloses a rubber product punching device, including a vulcanizing machine body; a receiving box located at the discharge port of the vulcanizing machine body; and a mobile device mounted on the vulcanizing machine body. The mobile device is equipped with a forming mold, and the vulcanizing machine body is equipped with a punching mechanism for automatically unloading the rubber product from the forming mold. The punching mechanism includes a fixed plate located on the top of the vulcanizing machine body. A stripper plate is mounted on the side of the fixed plate facing the receiving box via a stamping assembly. The stripper plate has multiple stripper columns that cooperate with the forming mold. Stripper components for lifting and tilting the forming mold are also located on both sides of the vulcanizing machine body. In this punching mechanism, the stripper columns are punches, and the stripper plate has stripper holes. During the forming process, the punches located above the stripper plate are inserted into the corresponding stripper holes, thereby forming a perforated structure in the product. However, this forming structure only has a punch on the upper die. For some products that need to form deep holes, the length of the punch needs to be designed to be long enough. During the forming process, due to the excessive stroke of the punch, deviations are prone to occur, which will lead to low processing accuracy of the deep hole structure. The difference between the upper and lower hole diameters of the deep hole structure is large, resulting in poor processing quality. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a punching die for the production of rubber products, which can solve the problem of poor processing quality in the past.

[0005] To solve the above-mentioned technical problems, this utility model discloses a punching die for producing rubber products, including an upper die and a lower die that can slide relative to the upper die in the height direction; the upper die is fixedly installed with a plurality of upper punches arranged at intervals and facing the lower die; the lower die is fixedly installed with a plurality of lower punches arranged at intervals and facing the upper die, and the lower die is also provided with a limiting plate located between the upper punches and the lower punches, each lower punch can slide relative to the limiting plate in the height direction, and the limiting plate has a plurality of through holes arranged at intervals; in the mold closed state, both the upper punches and the lower punches are inserted into the corresponding through holes.

[0006] The upper mold also includes an upper template, an upper punch fixing plate, and a guide plate arranged sequentially from top to bottom. The upper punch fixing plate is fixedly installed on the upper template, and each upper punch is fixedly installed on the upper punch fixing plate. The guide plate has multiple spaced first guide holes, and each upper punch is inserted into the corresponding first guide hole. The guide plate can move relative to the upper punch in the height direction.

[0007] Among them, a first spring is provided between the upper template and the guide plate to drive the guide plate to move downward.

[0008] The lower die also includes a lower punch fixing plate, a lower pad plate, and a lower template arranged sequentially from top to bottom. The limiting plate is located above the lower punch fixing plate. The lower punch fixing plate is fixedly installed on the lower pad plate. Each lower punch is fixedly installed on the lower punch fixing plate. The lower pad plate can move in the height direction relative to the lower template. The lower pad plate can also move in the height direction relative to the limiting plate.

[0009] A buffer spring is provided between the lower pad and the lower template.

[0010] A second spring is provided between the limiting plate and the lower pad to drive the limiting plate to move upward.

[0011] Compared with the prior art, the present invention has the following beneficial effects: by setting an upper punch and a lower punch, a double punch structure is adopted to replace the previous single punch structure, shortening the stroke of a single punch, improving the machining accuracy of deep hole structures, solving the problem of poor machining quality in the past, improving the yield rate, thereby improving machining efficiency and ensuring product machining quality. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the mold structure in the embodiment;

[0014] Figure 2 This is a cross-sectional view of the mold in the mold-closed state in the embodiment. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0017] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0018] This utility model discloses a specific embodiment of a punching die for manufacturing rubber products. Please see [link / reference]. Figures 1 to 2 It includes an upper mold and a lower mold that can slide relative to the upper mold in the height direction. It should be noted that four guide pillars are provided between the upper mold and the lower mold for guidance, to ensure that the upper mold and the lower mold can close smoothly.

[0019] In this embodiment, the upper die is fixedly mounted with multiple upper punches 31 arranged at intervals and facing the lower die. Specifically, the upper die also includes an upper template 11, an upper punch fixing plate 12, and a guide plate 13 arranged sequentially from top to bottom. The upper punch fixing plate 12 is fixedly mounted on the upper template 11, and this fixing can be achieved by bolts or screws. Each upper punch 31 is fixedly mounted on the upper punch fixing plate 12. The upper punch 31 can be fixedly mounted by snap-fit, that is, a head is formed at the top of the upper punch 31, and a countersunk hole is opened on the top surface of the upper punch fixing plate 12. By using the head to hold in the countersunk hole, multiple upper punches 31 can be fixedly mounted between the upper punch fixing plate 12 and the upper template 11. The guide plate 13 has multiple spaced first guide holes. Each upper punch 31 is inserted into the corresponding first guide hole. The guide plate 13 can move in the height direction relative to the upper punch 31. The guide plate 13 can be suspended below the upper template 11 by bolts. Specifically, the upper template 11 has corresponding through holes. The head of the bolt is held above the through hole. The bottom end of the bolt shank is threaded. By opening corresponding threaded holes at the positions of the bolts on the guide plate 13, the bottom end of the bolt shank is threadedly connected to the corresponding threaded holes. Since the bolt shank is inserted in the through hole, the bolt slides in the through hole along the axial direction of the through hole, thereby realizing the sliding of the guide plate 13 in the height direction relative to the upper punch 31 or the upper template 11.

[0020] In this embodiment, in order to facilitate the return of the die to its pre-processing state, a first spring 41 is provided between the upper template 11 and the guide plate 13 to drive the guide plate 13 to move downward. Specifically, the first spring 41 can be sleeved on the outer periphery of the bolt mentioned above.

[0021] In this embodiment, the lower die is fixedly equipped with a plurality of lower punches 32 arranged at intervals and facing the upper die. Specifically, the lower die also includes a limiting plate 21, a lower punch fixing plate 22, a lower pad plate 23 and a lower template 24 arranged sequentially from top to bottom.

[0022] In this embodiment, the limiting plate 21 is located above the lower punch fixing plate 22, and each lower punch 32 can slide relative to the limiting plate 21 in the height direction. The sliding installation of the limiting plate 21 is mainly achieved by the connection structure between the limiting plate 21 and the lower pad 23, so that the lower pad 23 can move relative to the limiting plate 21 in the height direction. Its specific principle and structure are the same as the sliding connection structure between the upper template 11 and the guide plate 13. The lower punch fixing plate 22 is fixedly installed on the lower pad 23, and each lower punch 32 is fixedly installed on the lower punch fixing plate 22. The installation method of fixing the lower punch 32 on the lower punch fixing plate 22 is the same as the installation method of fixing the upper punch 31 on the upper punch fixing plate 12.

[0023] In this embodiment, the lower pad 23 can move relative to the lower template 24 in the height direction. A buffer spring 42 is provided between the lower pad 23 and the lower template 24. The buffer spring 42 mainly plays a buffering role to avoid damage to the punch due to excessive mold closing force. The buffer spring 42 can be installed by fitting it onto a bolt.

[0024] In this embodiment, the limiting plate 21 of the lower mold is located between the upper punch 31 and the lower punch 32. The limiting plate 21 has a plurality of through holes 33 arranged at intervals. In the mold closing state, the upper punch 31 and the lower punch 32 are inserted into the corresponding through holes 33.

[0025] In order to facilitate the return of the die to its pre-processing state, a second spring 43 is provided between the limiting plate 21 and the lower pad 23 to drive the limiting plate 21 to move upward. The installation method of the second spring 43 is the same as that of the first spring 41.

[0026] Compared with the prior art, the die in this embodiment adopts a double-punch structure instead of the previous single-punch structure by setting an upper punch 31 and a lower punch 32, which shortens the stroke of a single punch. In the closed state, both the upper punch 31 and the lower punch 32 are inserted into the corresponding through hole 33. It can be understood that the upper punch 31 is inserted into the upper part of the through hole 33, and the lower punch 32 is inserted into the lower part of the through hole 33. Since the positions of the upper punch 31 and the lower punch 32 are limited by the die itself, the accuracy is high, which can improve the processing accuracy of deep hole structures, solve the problem of poor processing quality in the past, improve the yield rate, thereby improving processing efficiency and ensuring product processing quality.

[0027] Finally, it should be noted that the die for producing rubber products disclosed in this utility model is only a preferred embodiment of this utility model and is only used to illustrate the technical solution of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A punching die for manufacturing rubber products, characterized in that, It includes an upper mold and a lower mold that can slide relative to the upper mold in the height direction; The upper die is fixedly mounted with multiple upper punches arranged at intervals and facing the lower die; The lower die is fixedly installed with a plurality of lower punches arranged at intervals and facing the upper die. The lower die is also provided with a limiting plate located between the upper punches and the lower punches. Each of the lower punches can slide relative to the limiting plate in the height direction. The limiting plate has a plurality of through holes arranged at intervals. In the mold-closed state, both the upper punch and the lower punch are inserted into the corresponding through holes.

2. The die for producing rubber products according to claim 1, characterized in that, The upper mold also includes an upper template, an upper punch fixing plate, and a guide plate arranged sequentially from top to bottom. The upper punch fixing plate is fixedly installed on the upper template, and each upper punch is fixedly installed on the upper punch fixing plate. The guide plate has multiple spaced first guide holes, and each upper punch is inserted into the corresponding first guide hole. The guide plate can move relative to the upper punch in the height direction.

3. A punching die for producing rubber products according to claim 2, characterized in that, A first spring is provided between the upper template and the guide plate to drive the guide plate to move downward.

4. A punching die for producing rubber products according to claim 1, characterized in that, The lower die also includes a lower punch fixing plate, a lower pad plate, and a lower template arranged sequentially from top to bottom. The limiting plate is located above the lower punch fixing plate. The lower punch fixing plate is fixedly installed on the lower pad plate. Each of the lower punches is fixedly installed on the lower punch fixing plate. The lower pad plate can move in the height direction relative to the lower template and can move in the height direction relative to the limiting plate.

5. A punching die for producing rubber products according to claim 4, characterized in that, A buffer spring is provided between the lower pad and the lower template.

6. A punching die for producing rubber products according to claim 4, characterized in that, A second spring is provided between the limiting plate and the lower pad to drive the limiting plate to move upward.

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