Die structure of right-angle gasket

Abstract

The utility model relates to a die structure of a right-angle gasket. When a right-angle gasket is produced by an existing mold, the problems of air entrapment, edge extraction and difficulty in demolding exist. The die comprises an upper die and a lower die, and further comprises a plurality of inserts, a plurality of cavities are formed between the upper mold and the lower mold; a cavity is formed in the lower die, a plurality of clamping grooves communicated with the cavity are formed in the lower die, the inserts are arranged in the clamping grooves respectively, the inserts are in clearance fit with the clamping grooves, and when the inserts are taken out of the clamping grooves, gaskets in the cavity are completely exposed in an operable space. According to the utility model, gas generated by rubber flowing in the product vulcanization process can overflow from a gap between the insert and the clamping groove, so that turbulent flow, turbulent flow and turbulent flow generated in the rubber flowing process are reduced, the exhaust of the product in the vulcanization process is facilitated, the phenomena of gas entrapment, edge extraction and the like can be effectively prevented, the demolding of the product is facilitated, and the product quality is improved. And the product is prevented from being stuck in the cavity, so that the production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of rubber mold technology, specifically to a mold structure for a right-angle gasket. Background Technology

[0002] Rubber gaskets are used between two objects, mainly for sealing and shock absorption. They can usually prevent system leakage caused by mechanical wear due to pressure or other forces between the two workpieces.

[0003] Traditional rubber gaskets are typically molded using a two-part mold, consisting of an upper and lower mold. During vulcanization, the semi-finished product is placed inside the mold cavity, and the upper mold applies pressure to allow the rubber material to flow and solidify. However, for irregular gasket structures, such as those with right-angled shapes, the rubber material in traditional molds can only flow out from the parting line. Simultaneously, the heated rubber fluid causes a sharp increase in flow velocity within the mold cavity under high pressure, resulting in turbulent flow, including fluctuations and vortices. This makes it difficult for gas to escape at the right angles of the mold cavity, leading to air entrapment. Furthermore, the turbulent flow and disturbances of the rubber material at the mold parting surface can easily cause edge pulling. After vulcanization, the product is embedded in the lower mold cavity. Thin-walled gaskets tend to fit tightly into the cavity, creating a negative pressure zone between the gasket and the mold cavity wall. The limited space for demolding further complicates the process, making demolding difficult and increasing the risk of tearing.

[0004] Therefore, there is an urgent need for a mold structure for right-angle gaskets that is not prone to air entrapment or edge pulling during vulcanization and is easy to demold. Summary of the Invention

[0005] The purpose of this invention is to provide a mold structure for right-angle gaskets, so as to at least solve the problems of easy air entanglement, edge pulling, and difficulty in demolding when producing right-angle gaskets using current molds.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A mold structure for a right-angle gasket includes an upper mold and a lower mold, and also includes multiple inserts;

[0008] Multiple cavities are formed between the upper mold and the lower mold;

[0009] The lower mold is provided with a plurality of slots communicating with the cavity. The inserts are respectively disposed in the slots, and the inserts and the slots form a clearance fit. When the inserts are removed from the slots, the gaskets in the cavity are completely exposed in the operable space.

[0010] Furthermore, the upper surface of the lower mold is provided with multiple grooves.

[0011] Furthermore, the lower end face of the upper mold is provided with a plurality of protrusions corresponding to the groove.

[0012] Furthermore, the width of the protrusion is the same as the width of the groove, and the height and length of the protrusion are both less than the height and length of the groove.

[0013] Furthermore, the gap between the protrusion and the groove forms the cavity.

[0014] Furthermore, the cavities are arranged in a square shape.

[0015] Furthermore, the slot is elongated and has a rectangular or square vertical cross-section. The upper surface of the slot is flush with the upper surface of the lower mold, and the lower surface of the slot is lower than the bottom of the groove.

[0016] Furthermore, the slots are spaced parallel to each other on both sides of the cavity.

[0017] Furthermore, the insert is the same size as the slot.

[0018] Furthermore, the upper mold and the lower mold are fixed in place by positioning pins.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model provides a mold structure for a right-angle gasket. It features slots and inserts on both sides of the cavity, with a gap between the inserts and slots. This allows gas generated during the vulcanization process to escape through the gap between the inserts and slots, effectively reducing turbulence, flow disturbances, and other phenomena. This facilitates better venting during vulcanization, preventing air entrapment and edge pulling. Simultaneously, it facilitates demolding. During demolding, the inserts are removed from the slots, fully exposing the gasket within the cavity to the operable space. This also releases the negative pressure generated by the product's tight fit against the mold cavity, aiding demolding and preventing jamming and tearing during demolding. For smaller, thin-walled embedded gaskets, this effectively solves the problem of tearing during demolding, significantly improving production efficiency and greatly simplifying machining operations.

[0021] 2. This utility model has a simple structure, high mold fitting precision, strong operability, and high product qualification rate. The mold has been applied and the effect is good, which greatly improves the qualification rate of right angle gaskets. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 embodiments can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a top sectional view of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the AA section;

[0025] Figure 3 yes Figure 1 Schematic diagram of the BB cross section;

[0026] Figure 4 This is the main view of the right-angle gasket product;

[0027] Figure 5 This is a top view of the right-angle gasket product;

[0028] The diagram is labeled as follows:

[0029] 1-Upper mold, 2-Lower mold, 3-Insert, 4-Cavity, 5-Slot. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Example:

[0034] like Figure 1 As shown, this embodiment provides a mold structure for a right-angle gasket, including an upper mold 1 and a lower mold 2, and also includes three inserts 3. The upper mold 1 and the lower mold 2 are positioned and fixed by positioning pins to prevent misalignment, and four cavities 4 are formed between the upper mold 1 and the lower mold 2.

[0035] Specifically, the upper surface of the lower mold 2 has four grooves, and the lower surface of the upper mold 1 has four protrusions that correspond to the grooves.

[0036] Among them, such as Figure 2 As shown, the width of the protrusion is the same as the width of the groove, and the height and length of the protrusion are both less than the height and length of the groove. Thus, after the upper mold 1 and the lower mold 2 are fitted together, a right-angle gap is formed between the protrusion and the groove, which is the cavity 4.

[0037] Specifically, the four cavities 4 are arranged in a square shape, in two rows and two columns, and are all aligned.

[0038] In this embodiment, the lower mold 2 is provided with three slots 5 communicating with the cavity 4. Each slot 5 is elongated and has a rectangular vertical cross-section. The slots 5 are spaced parallel to each other on both sides of the cavity 4, as shown below. Figure 3 As shown, the insert 3 and the slot 5 are the same size. The upper end face of the slot 5 is flush with the upper end face of the lower mold 2, and the lower end face of the slot 5 is lower than the bottom of the groove, so that when the insert 3 is removed from the slot 5, the gasket in the cavity 4 is fully exposed in the operable space.

[0039] During product vulcanization, three inserts 3 are placed in the slots 5 of the lower mold 2, and the inserts 3 and the lower mold 2 are positioned by movable positioning pins. The inserts 3 and the slots 5 form a clearance fit, which ensures the integrity of the mold cavity 4 and allows the gas generated by the flow of rubber during vulcanization to overflow from the gap between the inserts 3 and the slots 5. This effectively reduces turbulence, turbulence and disturbance generated during the rubber flow process, which is conducive to venting during vulcanization and reduces air entrapment and edge pulling at the parting line of the product.

[0040] When the product is demolded, the insert 3 is removed from the slot 5, and the gasket in the cavity 4 is fully exposed in the operable space. At the same time, the negative pressure generated by the product being tightly attached to the mold cavity 4 is released, which is conducive to the demolding of the product and prevents the product from getting stuck in the cavity 4, which would cause the product to tear and deform during demolding. For smaller, thin-walled embedded gaskets, this can effectively solve the problem of product tearing during demolding, thereby greatly improving production efficiency and greatly simplifying the machining operation, which is beneficial to machining.

[0041] This utility model uses a mold for right-angle gaskets to prepare its products. The molding mold has a simple structure, high mold matching precision, strong operability, high product qualification rate, and also has the characteristics of long service life and good performance, which greatly improves the qualification rate of right-angle gaskets.

[0042] The usage process in this embodiment is as follows:

[0043] like Figure 4 and Figure 5 As shown, the product specifications are (17×10×8.5×7.5×15)mm, and the molding process is as follows:

[0044] 1. Cut the film into a thin sheet of (1.2-1.4) mm, cut it into uniform strips of 10 mm, and then cut the strips into segments of (34-38) mm for later use.

[0045] 2. Clean the mold thoroughly, then place the insert 3 into the slot 5 of the lower mold 2 and preheat the mold.

[0046] 3. After the mold is preheated, use copper sticks to attach the pre-prepared semi-finished rubber strips to the cavity 4 wall of the mold, and cover the upper mold 1 for molding and vulcanization.

[0047] 4. After vulcanization is complete, demold the product. When demolding the product, first open the upper mold 1, remove the movable positioning pin on the insert 3, and then remove the insert 3. At this time, there are no obstacles on both sides of the product, and the product can be taken out directly.

[0048] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A mold structure for a right-angle gasket, comprising an upper mold (1) and a lower mold (2), characterized in that: It also includes multiple inlays (3); Multiple cavities (4) are formed between the upper mold (1) and the lower mold (2); The lower mold (2) is provided with a plurality of slots (5) that communicate with the cavity (4). The inserts (3) are respectively disposed in the slots (5), and the inserts (3) and the slots (5) form a clearance fit. When the inserts (3) are removed from the slots (5), the gaskets in the cavity (4) are completely exposed in the operable space.

2. The mold structure for a right-angle washer according to claim 1, characterized in that: The upper surface of the lower mold (2) is provided with multiple grooves.

3. The mold structure for a right-angle washer according to claim 2, characterized in that: The lower end face of the upper mold (1) is provided with a plurality of protrusions corresponding to the groove.

4. The mold structure for a right-angle gasket according to claim 3, characterized in that: The width of the protrusion is the same as the width of the groove, and the height and length of the protrusion are both less than the height and length of the groove.

5. The mold structure for a right-angle washer according to claim 4, characterized in that: The gap between the protrusion and the groove forms the cavity (4).

6. The mold structure for a right-angle washer according to claim 1, characterized in that: The cavity (4) is distributed in a square shape.

7. The mold structure for a right-angle washer according to claim 2, characterized in that: The slot (5) is long and narrow, and its vertical cross-section is rectangular or square. The upper end face of the slot (5) is flush with the upper end face of the lower mold (2), and the lower end face of the slot (5) is lower than the bottom of the groove.

8. The mold structure for a right-angle washer according to claim 1, characterized in that: The slots (5) are spaced parallel to each other on both sides of the cavity (4).

9. The mold structure for a right-angle washer according to claim 1, characterized in that: The insert (3) is the same size as the slot (5).

10. The mold structure for a right-angle washer according to claim 1, characterized in that: The upper mold (1) and the lower mold (2) are fixed in place by positioning pins.

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