Primary and secondary mold for forming O-shaped rubber ring

Abstract

The utility model belongs to the technical field of O-shaped rubber ring moulds, and particularly relates to a primary-secondary mould for forming O-shaped rubber rings, which comprises an upper mould core, a plurality of mould cavities are arranged at the top of the upper mould core, the plurality of mould cavities are concentrically arranged and distributed, the plurality of mould cavities are ring-shaped, and exhaust grooves are arranged on two sides of each mould cavity. According to the primary-secondary mold for forming the O-shaped rubber ring, the inner wall of the exhaust groove is arranged to be triangular, so that the exhaust effect can be enhanced, and due to the fact that sharp corners can break through resistance in a rubber material more effectively, air escape is promoted; a plurality of concentric die cavities form three rubber rings with different diameters, the die is provided with three die grooves with different sizes, the forming efficiency is high, the triangular exhaust grooves are formed, exhaust is increased, flash is reduced, and the problems that the size is too small, flash occurs mutually, the thickness of the formed edges of the rubber rings is not uniform, burrs are many and too large, materials are wasted and the production cost is low are solved through the arrangement of the size interval of 100 mm. And a lot of waste materials are arranged at intervals.

Description

Technical Field

[0001] The utility model relates to the technical field of O-ring rubber mold, in particular to a mother-child mold for O-ring rubber forming. Background Art

[0002] In the production of rubber products, O-ring rubber is widely used in various mechanical equipment and pipeline connections due to its good sealing performance. As a key tool for producing O-ring rubber, the design and manufacturing quality of die-casting molds directly affect the performance and cost of products. However, the existing O-ring rubber die-casting mold technology has the following problems: currently, the O-ring rubber die-casting mold generally adopts a conventional single-hole arrangement. In this arrangement, even a 600-size template can only accommodate 1 hole, which results in a high cost of the mold. At the same time, due to the low forming efficiency, the production efficiency cannot meet the market demand, causing waste of resources; and because the shape and size requirements of the current O-ring are relatively high, poor flow of rubber compound during processing will also cause production abnormalities such as overflow and poor exhaust. These problems not only affect the appearance and quality of products, but may also lead to damage to the mold and a decrease in production efficiency; therefore, a mother-child mold for O-ring rubber forming is needed. Content of the Utility Model

[0003] Based on the existing technical problems, the utility model provides a mother-child mold for O-ring rubber forming.

[0004] The mother-child mold for O-ring rubber forming provided by the utility model includes an upper die core. A mold cavity is formed at the top of the upper die core. A plurality of the mold cavities are arranged concentrically and are circular in shape. Exhaust grooves are provided on both sides of each mold cavity. The inner wall of the exhaust groove is triangular. A plurality of the exhaust grooves are formed at the top of the upper die core, and the centers of the plurality of exhaust grooves are located on the same axis as the center of the mold cavity. A lace is provided on one side of the exhaust groove. The lace is formed at the top of the upper die core. Every two exhaust grooves and one mold cavity are located inside two laces.

[0005] Preferably, T-shaped upper die slots are formed at the front top and the rear top of the upper die core. A plurality of the T-shaped upper die slots are arranged in a rectangular array.

[0006] Preferably, positioning holes are further formed at the front top and the rear top of the upper die core. Four positioning holes are arranged in a rectangular array, and the rectangle formed by the four T-shaped upper die slots is located inside the rectangle formed by the four positioning holes.

[0007] Preferably, the distance between every two of the mold cavities is set to 100 mm, and the top ends of the opposite inner walls of the two exhaust grooves are respectively in contact with both sides of the inner top wall of the inner mold cavity.

[0008] Preferably, the depth of the lace is set to 1 mm, and the depth of the exhaust groove is set to 6.5 mm.

[0009] The beneficial effects of the present utility model are as follows:

[0010] By setting the inner wall of the exhaust groove to be triangular, it helps to enhance the exhaust effect, because the sharp corners can more effectively break through the resistance in the rubber compound and promote the escape of air; multiple concentric mold cavities form three rubber rings with different diameters, and the mold has three mold grooves with different sizes, with high molding efficiency. There is also a triangular exhaust groove provided to increase exhaust and reduce the generation of overflow materials. By setting the size interval to 100 mm, it avoids the situation that if the size is too small, there will be mutual overflow of materials, uneven thickness of the formed edge of the rubber ring, and a lot of burrs, and if the size is too large, it will waste materials and there will be a lot of waste in the interval. Description of the Drawings

[0011] Figure 1 It is a schematic structural view of a mother - son mold for forming an O - ring;

[0012] Figure 2 It is a Figure 1 structural cross - sectional view at A of a mother - son mold for forming an O - ring;

[0013] Figure 3 It is a front view of the T - shaped upper mold slot structure of a mother - son mold for forming an O - ring.

[0014] In the figure: 1, upper mold core; 2, mold cavity; 3, exhaust groove; 4, lace; 5, T - shaped upper mold slot; 6, positioning hole. Specific Embodiments

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0016] Refer to Figures 1-3, A mother - son mold for O - ring molding, including an upper die core 1. A mold cavity 2 is opened at the top of the upper die core 1. Multiple mold cavities 2 are arranged concentrically and distributed, and multiple mold cavities 2 are in a circular ring shape. Exhaust grooves 3 are arranged on both sides of each mold cavity 2. The inner wall of the exhaust groove 3 is triangular. Multiple exhaust grooves 3 are opened at the top of the upper die core 1, and the centers of multiple exhaust grooves 3 and the center of the mold cavity 2 are on the same axis. A lace 4 is also arranged on one side of the exhaust groove 3. The lace 4 is opened at the top of the upper die core 1. Every two exhaust grooves 3 and one mold cavity 2 are located inside two laces 4.

[0017] The multiple mold cavities 2 are arranged concentrically and distributed, which can produce multiple O - rings simultaneously in one injection molding process, thus significantly improving production efficiency; the circular - ring - shaped mold cavity 2 can ensure that the cross - section of the produced O - ring is uniform, improving the dimensional accuracy and consistency of the product; the exhaust grooves 3 can help discharge air during the injection molding process, reducing air bubbles inside the product and improving the product quality; the existence of the lace 4 can also serve as an auxiliary structure for demolding, helping the rubber ring to be more easily detached from the mold after molding.

[0018] T - shaped upper die clamping grooves 5 are opened at the front top and the rear top of the upper die core 1. Multiple T - shaped upper die clamping grooves 5 are arranged in a rectangular array; positioning holes 6 are also opened at the front top and the rear top of the upper die core 1. Four positioning holes 6 are arranged in a rectangular array, and the rectangle formed by the four T - shaped upper die clamping grooves 5 is located inside the rectangle formed by the four positioning holes 6.

[0019] Specifically implemented in this way, the rectangular array distribution of the T - shaped upper die clamping grooves 5 helps to accurately position and fix the mold components, ensuring that the relative positions of each component remain unchanged during the molding process, thus improving the dimensional accuracy of the product; the groove design of the rectangular array distribution makes the mold components have good interchangeability, facilitating rapid replacement and repair; the setting of the positioning holes 6 can enhance the overall stability of the mold. Through elements such as fixing pins, it can prevent the mold from shifting during the molding process.

[0020] The distance between every two mold cavities 2 is set to 100 mm. The top ends of the opposite inner walls of the two exhaust grooves 3 are respectively in contact with both sides of the inner top wall of the inner mold cavity 2; the depth of the lace 4 is set to 1 mm, and the depth of the exhaust groove 3 is set to 6.5 mm.

[0021] Specifically, the fixed spacing of the mold cavities 2 helps to ensure that each rubber ring can be evenly heated and cooled during the molding process, thereby improving the consistency of the products; the top ends of the opposite inner walls of the exhaust grooves 3 are in contact with both sides of the inner top wall of the mold cavity 2. This design ensures that during the injection molding process, air and excess material can be effectively discharged from the mold cavity 2, reducing air bubbles and defects inside the products; the close contact between the exhaust grooves 3 and the mold cavity 2 helps to prevent the rubber material from overflowing the mold cavity 2 under high pressure, keeping the mold clean and the production environment tidy.

[0022] By setting the inner wall of the exhaust groove 3 to be triangular, it helps to enhance the exhaust effect because the sharp corners can more effectively break through the resistance in the rubber compound and promote the escape of air; multiple concentric mold cavities 2 form rubber rings with three different diameters, and the mold has three mold grooves with different sizes, with high molding efficiency. Additionally, there is a triangular exhaust groove 3 set, which increases exhaust and reduces the generation of overflow materials. Through the setting of the size interval of 100 mm, it avoids the problems of small sizes that may cause mutual overflow of materials, uneven thickness of the forming edges of the rubber rings, and many burrs, as well as large sizes that waste materials and result in a lot of waste in the intervals.

[0023] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent replacements or changes should be covered within the protection scope of the present utility model.

Claims

1. A mother and son mold for O-ring forming, including an upper die core (1), characterized in that: The top of the upper die core (1) is provided with a die cavity (2), and a plurality of the die cavities (2) are arranged concentrically and distributed in a circular ring shape. Exhaust grooves (3) are provided on both sides of each die cavity (2). The inner wall of the exhaust groove (3) is triangular. A plurality of the exhaust grooves (3) are opened at the top of the upper die core (1), and the centers of the plurality of exhaust grooves (3) are located on the same axis as the center of the die cavity (2). A lace (4) is further provided on one side of the exhaust groove (3). The lace (4) is opened at the top of the upper die core (1). Every two exhaust grooves (3) and one die cavity (2) are located inside two laces (4).

2. The mother and son mold for forming an O-ring rubber seal according to claim 1, characterized in that: T-shaped upper die clamping grooves (5) are opened at the front top and the rear top of the upper die core (1), and a plurality of the T-shaped upper die clamping grooves (5) are distributed in a rectangular array.

3. The mother and son mold for forming an O-ring rubber seal according to claim 2, characterized in that: Positioning holes (6) are further opened at the front top and the rear top of the upper die core (1). Four positioning holes (6) are distributed in a rectangular array, and the rectangle formed by the four T-shaped upper die clamping grooves (5) is located inside the rectangle formed by the four positioning holes (6).

4. The mother-child mold for forming an O-ring rubber seal according to claim 1, wherein: The distance between every two die cavities (2) is set to be 100 mm, and the top ends of the opposite inner walls of the two exhaust grooves (3) are respectively in contact with both sides of the inner top wall of the inner die cavity (2).

5. The mother and son mold for forming an O-ring rubber seal according to claim 1, characterized in that: The depth of the lace (4) is set to be 1 mm, and the depth of the exhaust groove (3) is set to be 6.5 mm.

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