An adjustable pressure rubber vulcanization forming mold

Abstract

This invention provides an adjustable pressure rubber vulcanization molding die, relating to the field of mold technology. It includes a fixed mold base with a mold cavity at the center of its top. A support frame is fixedly connected to the top of the fixed mold base. This invention utilizes a structure consisting of a screw tube, a screw rod, a connecting rod, a handle, and an upper mold. By using the threaded engagement between the screw rod and the screw tube, rotating the handle causes the screw rod to move the upper mold up and down, thereby changing the size of the mold cavity and adjusting the pressure. This eliminates the need for complex hydraulic and pneumatic pressure adjustment systems, achieving pressure regulation through a simple mechanical structure. No additional power source is required, reducing the manufacturing cost and maintenance difficulty of the mold. Operation is simple; pressure adjustment is achieved by simply rotating the handle. It can quickly adapt to the vulcanization pressure requirements of different rubber products, improving the versatility and applicability of the mold, making it particularly suitable for small factories or simple production scenarios.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an adjustable pressure rubber vulcanization molding mold. Background Technology

[0002] In the production of rubber products, vulcanization molding is a crucial step, and the pressure applied by the mold plays a vital role in the quality of the rubber products. Different types, specifications, and rubber formulations of products often require different pressure conditions during vulcanization molding to ensure that rubber molecules can fully cross-link, thereby obtaining ideal physical and chemical properties. Currently available rubber vulcanization molding molds either have non-adjustable pressure, limiting their use to specific products and resulting in poor versatility; or they employ complex adjustment methods, such as hydraulic or pneumatic pressure adjustment systems, which, while offering relatively powerful adjustment capabilities, suffer from high costs, complex structures, the need for corresponding power sources, and significant maintenance difficulties. Therefore, it is necessary to design a rubber vulcanization molding mold that is simple in structure, low in cost, and can effectively adjust pressure to meet the needs of different production scenarios, especially for small factories or the production of simple rubber products. Utility Model Content

[0003] This utility model mainly provides an adjustable pressure rubber vulcanization molding die.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable pressure rubber vulcanization molding die, comprising a fixed mold base, a mold cavity, a support frame, a screw, an upper mold, a connecting rod, a handle, and a spiral tube. The mold cavity is located at the center of the top of the fixed mold base. The support frame is fixedly connected to the top of the fixed mold base. The spiral tube is fixedly connected to the top of the support frame. The screw is threadedly connected to the inside of the spiral tube. The bottom end of the screw is provided with an upper mold that can rotate axially relative to the screw. The connecting rod is fixedly connected to the top end of the screw. A rotatable handle is provided on the connecting rod.

[0005] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by setting up a screw tube, screw rod, connecting rod, handle, and upper mold, the screw rod and screw tube are threaded together. When the handle is rotated, the screw rod will drive the upper mold to move up and down, thereby changing the size of the mold cavity and achieving the purpose of adjusting the pressure. It eliminates the need for complex hydraulic and pneumatic pressure adjustment systems and achieves pressure adjustment through a simple mechanical structure. No additional power source is required, which reduces the manufacturing cost and maintenance difficulty of the mold. At the same time, it is easy to operate. Pressure adjustment can be completed by simply rotating the handle. It can quickly adapt to the vulcanization pressure requirements of different rubber products, improve the versatility and applicability of the mold, and is especially suitable for use in small factories or simple production scenarios.

[0006] 2. In this utility model, by setting a circular groove, a top plate, and a push rod at the bottom of the mold cavity, after the rubber product is vulcanized, the push rod is pushed upward, and the push rod will drive the top plate to move upward in the circular groove, thereby ejecting the rubber product from the mold cavity. The vertical thrust of the push rod is transmitted to the top plate, so that the top plate applies an upward ejection force to the rubber product, realizing the separation of the product from the mold cavity. The product can be quickly removed from the mold cavity, avoiding the damage that may be caused to the product when it is manually removed, ensuring product quality, and also improving material feeding efficiency. Attached Figure Description

[0007] Figure 1 A schematic diagram of an adjustable pressure rubber vulcanization molding die is provided for this utility model; Figure 2 A bottom view of an adjustable pressure rubber vulcanization molding die proposed for this utility model; Figure 3 An exploded view of an adjustable pressure rubber vulcanization molding die proposed in this utility model; Figure 4 This invention proposes an adjustable pressure rubber vulcanization molding die. Figure 3 Enlarged view of point A in the middle; Figure 5 This utility model provides a cross-sectional view of the upper mold of an adjustable pressure rubber vulcanization molding die.

[0008] Legend: 1. Fixed mold base; 2. Mold cavity; 3. Support frame; 4. Screw; 5. Upper mold; 6. Connecting rod; 7. Handle; 8. Handle sleeve; 9. Scale markings; 10. Screw tube; 11. Limiting hole; 12. Circular groove; 13. Circular hole; 14. Top plate; 15. Ejector rod; 16. Limiting rod; 17. Heating plate; 18. Receiving groove. Detailed Implementation

[0009] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0010] Please see Figure 1 - Figure 4This utility model provides a technical solution: an adjustable pressure rubber vulcanization molding die, including a fixed mold base 1, a mold cavity 2, a support frame 3, a screw 4, an upper mold 5, a connecting rod 6, a handle 7, and a screw tube 10. The mold cavity 2 is opened at the center of the top of the fixed mold base 1. The support frame 3 is fixedly connected to the top of the fixed mold base 1. The screw tube 10 is fixedly connected to the top of the support frame 3. The screw 4 is threadedly connected to the inside of the screw tube 10. The bottom end of the screw 4 is provided with an upper mold 5 that can rotate axially relative to the screw 4. The connecting rod 6 is fixedly connected to the top end of the screw 4. A rotatable handle 7 is provided on the connecting rod 6.

[0011] like Figure 4 As shown, the outer wall of the grip 7 is fitted with a handle sleeve 8 made of skin-friendly material. This allows the operator to feel more comfortable when turning the grip 7 to adjust the pressure, reducing hand discomfort caused by prolonged operation and improving the comfort of operation.

[0012] like Figure 3 As shown, a limiting hole 11 is provided on the top of the support frame 3, and a limiting rod 16 is fixedly connected to the top of the upper mold 5. The limiting rod 16 is inserted into the limiting hole 11. This can prevent the upper mold 5 from rotating with the screw 4 when the size of the mold cavity 2 is changed.

[0013] like Figure 3 and Figure 5 As shown, an accommodating groove 18 is provided inside the upper mold 5 near the bottom. A heating plate 17 is provided inside the accommodating groove 18. The heating plate 17 can directly heat the rubber material in the mold cavity 2 to ensure that the rubber material can undergo vulcanization reaction in a suitable temperature environment, accelerate the vulcanization speed, and ensure the consistency of the vulcanization effect.

[0014] like Figure 3 As shown, the outer wall of the upper mold 5 is vertically marked with scale markings 9. When the operator rotates the screw 4 to adjust the position of the upper mold 5 to change the space and pressure of the mold cavity 2, the operator can intuitively observe the moving distance of the upper mold 5 through the scale markings 9. This allows for a clear understanding of the changes in the space of the mold cavity 2 and the range of pressure adjustment. It is convenient for the operator to quickly and accurately adjust to the appropriate pressure value based on experience or predetermined production parameters. It also facilitates the recording of pressure adjustment during the production of different rubber products, which is beneficial for quickly and accurately replicating the previous pressure adjustment state when producing the same product repeatedly, ensuring the stability of product quality.

[0015] like Figure 2 and Figure 3As shown, a circular groove 12 is provided at the bottom of the mold cavity 2, and a top plate 14 is provided inside the circular groove 12. A circular hole 13 is provided at the bottom of the circular groove 12. A push rod 15 is fixedly connected to the bottom of the top plate 14. The push rod 15 is inserted into the circular hole 13. Pushing the push rod 15 upward will cause the top plate 14 to move upward in the circular groove 12, thereby ejecting the rubber product in the mold cavity 2. The vertical thrust of the push rod 15 is transmitted to the top plate 14, so that the top plate 14 applies an upward ejection force to the rubber product, realizing the separation of the product from the mold cavity 2, and the product can be quickly removed from the mold cavity 2.

[0016] The operating method and working principle of this device are as follows: First, place the unvulcanized rubber raw material into the mold cavity 2 at the center of the top of the fixed mold base 1. Next, the operator holds the handle 7 and rotates the handle 7 to drive the connecting rod 6 and the connected screw 4 to rotate within the screw tube 10. Since the screw 4 and the screw tube 10 are threadedly connected, and the upper mold 5 at the bottom of the screw 4 can rotate axially relative to the screw 4, the upper mold 5, guided by the limiting rod 16 and the limiting hole 11, moves smoothly up and down vertically during the rotation of the screw 4. This changes the size of the space in the mold cavity 2 between the upper mold 5 and the fixed mold base 1, thereby adjusting the pressure within the mold cavity 2. During adjustment, the operator can refer to the scale markings 9 on the outer wall of the upper mold 5. The operator can visually observe the movement distance of the upper mold 5 while rotating the screw 4. Because there is a direct correlation between the size of the mold cavity 2 and the pressure—a smaller space increases the pressure, and a larger space decreases the pressure—the operator can adjust the pressure based on experience and past production practices of this type of rubber. The data accumulated from the rubber products, through the movement of the upper mold 5 as shown by the scale mark 9, roughly infers the pressure variation. At the same time, the heating plate 17 in the receiving groove 18 near the bottom of the upper mold 5 starts to work, heating the rubber raw material in the mold cavity 2. This allows the rubber raw material to begin the vulcanization reaction under the adjusted pressure and the suitable temperature provided by the heating plate 17. During the continuous vulcanization reaction, the pressure and temperature continue to act, promoting the full cross-linking of rubber molecules and completing the molding process of the rubber product. After the rubber product is vulcanized, the ejector rod 15 is pushed upwards. The ejector rod 15 drives the ejector plate 14 to move upwards in the circular groove 12. The ejector plate 14 acts on the bottom of the rubber product, smoothly ejecting the rubber product from the mold cavity 2, completing the entire rubber vulcanization molding and unloading operation. Then, the next round of rubber product production can begin.

[0017] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An adjustable pressure rubber vulcanization molding die, comprising a fixed mold base (1), characterized in that: The fixed mold base (1) has a mold cavity (2) at the top center. A support frame (3) is fixedly connected to the top of the fixed mold base (1). A screw tube (10) is fixedly connected to the top of the support frame (3). A screw rod (4) is threaded inside the screw tube (10). An upper mold (5) that rotates axially relative to the screw rod (4) is provided at the bottom end of the screw rod (4). A connecting rod (6) is fixedly connected to the top end of the screw rod (4). A rotatable handle (7) is provided on the connecting rod (6).

2. The adjustable pressure rubber vulcanization molding die according to claim 1, characterized in that: The outer wall of the grip (7) is fitted with a handle sleeve (8) supported by a skin-friendly material.

3. The adjustable pressure rubber vulcanization molding die according to claim 1, characterized in that: The support frame (3) has a limiting hole (11) at its top, and the upper mold (5) is fixedly connected to a limiting rod (16) at its top. The limiting rod (16) is inserted into the limiting hole (11).

4. The adjustable pressure rubber vulcanization molding die according to claim 1, characterized in that: The upper mold (5) has a receiving groove (18) near the bottom, and a heating plate (17) is provided inside the receiving groove (18).

5. The adjustable pressure rubber vulcanization molding die according to claim 1, characterized in that: The outer wall of the upper mold (5) is vertically marked with scale markings (9).

6. The adjustable pressure rubber vulcanization molding die according to claim 1, characterized in that: The bottom of the mold cavity (2) is provided with a circular groove (12), and a top plate (14) is provided inside the circular groove (12). A circular hole (13) is provided at the bottom of the circular groove (12), and a top rod (15) is fixedly connected to the bottom of the top plate (14). The top rod (15) is inserted into the circular hole (13).

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