Shell type rubber sealing product forming mold and using method thereof

Abstract

The invention discloses a shell type rubber sealing product forming mold and a using method thereof, and belongs to the technical field of sealing product molds. The base, the adapter, the injection molding base and the injection molding pressing plate are sequentially stacked and fixedly connected from bottom to top, the middle of the base is in clearance insertion connection with the mandrel, the adapter is of a rectangular frame structure, the middle of the injection molding base is in clearance insertion connection with the injection molding base, and the middle of the injection molding pressing plate is in clearance insertion connection with the injection molding plug. The injection molding plug is used in cooperation with the injection molding base, and the injection molding base and the mandrel are arranged correspondingly. According to the invention, microscopic cracks and structural fractures generated in the vulcanization process of the aluminum metal framework are avoided, the product yield is improved, uniform filling of a rubber material is ensured, the vulcanization molding efficiency and quality are improved, the safety and stability of a mold are ensured, and the operation difficulty is reduced; and the rate of unqualified products is reduced, the waste of production cost is avoided, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to a shell-type rubber sealing product forming mould and a use method thereof, belonging to the technical field of sealing product moulds. Background Art

[0002] Shell rubber sealing products are a type of special structural products, usually using aluminum as a supporting frame, and their interior is designed as a hollow, special-shaped cavity structure with specific functions. The core technology of this type of product is to inject unvulcanized rubber material into the closed inner cavity of the aluminum frame, and use the vulcanization process to cross-link and solidify the rubber material, thereby forming a dense bonding layer at the interface between the metal substrate and the rubber, and finally realizing the sealing function of the shell rubber sealing product.

[0003] In the prior art, since aluminum itself has a low yield strength and Young's modulus, during the rubber vulcanization process, when the rubber material expands due to heat in the mold cavity, the lateral pressure generated by its volume change exceeds the critical bearing strength of the aluminum alloy skeleton, causing micro cracks to expand on the skeleton wall, and eventually causing structural rupture, resulting in irreversible plastic deformation of the aluminum skeleton. This not only leads to low product yields and a significant increase in production costs, but also seriously delays the delivery cycle due to the inability to stably supply qualified products, and at the same time causes end customers to question the reliability of product quality. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention provides a shell type rubber sealing product molding die and a use method thereof.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a molding die for a shell-type rubber sealing product, comprising a base, an adapter seat, an injection molding base, an injection molding platen, an injection molding seat, an injection molding plug and a core shaft; the base, the adapter seat, the injection molding base and the injection molding platen are stacked and fixedly connected in sequence from bottom to top, the middle part of the base is gap-plugged with the core shaft, the adapter seat is a rectangular frame structure, the middle part of the injection molding base is gap-plugged with the injection molding seat, the middle part of the injection molding platen is gap-plugged with the injection molding plug, the injection molding plug is used in conjunction with the injection molding seat, and the injection molding seat and the core shaft are arranged correspondingly.

[0006] The injection molding seat is a columnar structure with a T-shaped cross-section, an exhaust hole is provided at the upper end of the middle part of the injection molding seat, and an avoidance groove is provided at the lower end of the middle part of the injection molding seat, and the avoidance groove is connected to the exhaust hole; a circular material chamber is provided on the upper surface of the injection molding seat, and a plurality of feeding holes are provided on the bottom surface of the material chamber, and a discharge hole is provided on the bottom surface of each feeding hole, and each discharge hole passes through the lower surface of the injection molding seat, and the connection between the material chamber, the feeding hole and the discharge hole is processed with rounded corners.

[0007] The discharging end of each discharging hole is an arc-shaped structure, and the arc-shaped structure is in interference contact with the aluminum metal skeleton.

[0008] A method for using a forming mold for a rubber sealing product of a housing type according to the present invention, the method comprising the following steps:

[0009] S1: Install the mandrel on the base;

[0010] S2: Insert the inner diameter of the lower end of the aluminum metal skeleton onto the outer diameter of the upper end of the mandrel and then position it on the base;

[0011] S3: Install and fix the injection molding seat and the injection molding base;

[0012] S4: Install and fix the injection molding base, the adapter seat and the base in sequence, and place the injection molding seat on the upper end of the aluminum metal skeleton;

[0013] S5: Place rubber in the material chamber of the injection molding seat;

[0014] S6: Insert the insertion part at the lower end of the injection molding plug into the material chamber of the injection molding seat with a gap;

[0015] S7: Install and fix the injection molding pressing plate and the injection molding base;

[0016] S8: Apply pressure to the injection molding pressing plate through a vulcanization device, so that the rubber enters the inside of the aluminum metal skeleton through the discharging hole of the injection molding seat, and the gas is discharged through the air vent to complete vulcanization molding.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The present invention optimizes the mold structure, designs an arc-shaped structure at the contact position between the device and the aluminum metal skeleton, effectively increases the contact area and reduces the pressure, avoids the generation of micro-cracks and structural fractures in the aluminum metal skeleton during the vulcanization process, and improves the product yield; the mold adopts a layered and block design, decomposes the vulcanization pressure layer by layer, ensures uniform filling of the rubber material, and at the same time discharges the gas through the air vent, improving the vulcanization molding efficiency and quality; the components are fixed by pins and screws to ensure the safety and stability of the mold, and handles and mold lifting ports are provided for easy operation, and the mold has been weight-reduced to reduce the operation difficulty; the defective product rate is reduced, the waste of production cost is avoided, the production efficiency is improved, and the production cost is reduced. Description of the Drawings

[0019] Figure 1 is a structural schematic diagram of the present invention;

[0020] Figure 2 is Figure 1 the top view of

[0021] Figure 3 is Figure 2J-J cross-sectional view;

[0022] Figure 4 is a schematic structural view of the base;

[0023] Figure 5 is Figure 4 A-A cross-sectional view of;

[0024] Figure 6 is a schematic structural view of the adapter base;

[0025] Figure 7 is Figure 6 front view of;

[0026] Figure 8 is Figure 6 T-T cross-sectional view of;

[0027] Figure 9 is a schematic structural view of the injection molded base;

[0028] Figure 10 is Figure 9 L-L cross-sectional view of;

[0029] Figure 11 is a schematic structural view of the injection molded pressing plate;

[0030] Figure 12 is Figure 11 U-U cross-sectional view of;

[0031] Figure 13 is a schematic structural view of the injection molded seat. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] A molding die for a rubber sealing product of the shell type, comprising a base 1, an adapter seat 2, an injection molding base 3, an injection molding pressing plate 4, an injection molding seat 5, an injection molding plug 6 and a mandrel 7; the base 1, the adapter seat 2, the injection molding base 3 and the injection molding pressing plate 4 are stacked in sequence from bottom to top and fixedly connected by screws, and rough positioning is carried out by pins to prevent the problem of misalignment and bruising. An installation through hole 1-1 is machined in the middle of the base 1, and the installation through hole 1-1 is inserted into the mandrel 7 with a clearance. T-shaped through holes 1-2 and circular through holes 1-3 are machined at the four corners of the base 1. The T-shaped through holes 1-2 are used for installing screws, and the circular through holes 1-3 are used for placing pins. The adapter seat 2 is of a rectangular frame structure. Threaded holes 2-2 and circular through holes 2-3 are machined at the four corners of the upper end face and the lower end face of the adapter seat 2. The threaded holes 2-2 are arranged in one-to-one correspondence with the T-shaped through holes 1-2, facilitating the connection and fixation of the adapter seat 2 and the base 1 by screws; the circular through holes 2-3 are arranged in one-to-one correspondence with the circular through holes 1-3 for placing pins; a U-shaped groove 2-4 penetrating through its end face is provided on the side wall of the adapter seat 2, aiming to reduce weight and facilitate operation. A T-shaped groove 3-1 is machined in the middle of the injection molding base 3, and the T-shaped groove 3-1 is inserted into the injection molding seat 5 with a clearance. Through-hole 3-2 and circular through holes 3-3 are machined at the four corners of the injection molding base 3. The through-hole 3-2 is arranged in one-to-one correspondence with the threaded hole 2-2, facilitating the connection and fixation of the adapter seat 2 and the injection molding base 3 by screws; the circular through holes 3-3 are arranged in one-to-one correspondence with the circular through holes 2-3 for placing pins; a plurality of T-shaped screw holes 3-4 are machined along the circumference of the T-shaped groove 3-1, facilitating the fixation of the plastic base 3 and the injection molding seat 5. A T-shaped groove 4-1 is machined in the middle of the injection molding pressing plate 4, and the T-shaped groove 4-1 is inserted into the injection molding plug 6 with a clearance. A mold opening 4-2 with a size of 15 mm × 30 mm × 5 mm in length × width × thickness is machined at the upper end and the lower end of the injection molding pressing plate 4 respectively, facilitating the operation of the operator. The injection molding plug 6 is used in cooperation with the injection molding seat 5, and the injection molding seat 5 is arranged corresponding to the mandrel 7.

[0034] The injection molding seat 5 is a columnar structure with a T-shaped cross-section. An exhaust hole 5-1 penetrating through its upper surface is provided at the upper end of the middle part of the injection molding seat 5, and a T-shaped avoidance groove 5-6 penetrating through its lower surface is provided at the lower end of the middle part of the injection molding seat 5. The avoidance groove 5-6 is communicated with the exhaust hole 5-1, facilitating the avoidance of the skeleton and the vulcanization process; a circular rubber storage chamber 5-2 is provided on the upper surface of the injection molding seat 5 along its circumference. A plurality of uniformly distributed material passing holes 5-4 are provided on the bottom surface of the material chamber 5-2 along its circumference. An outlet hole 5-5 is provided on the bottom surface of each material passing hole 5-4, and each outlet hole 5-5 penetrates through the lower surface of the injection molding seat 5. Fillets are machined at the joints of the material chamber 5-2, the material passing holes 5-4 and the outlet holes 5-5 to avoid obstacles during rubber flow.

[0035] Four threaded holes 5-3 are machined along the circumference at the lower end of the convex platform of the injection molding seat 5, facilitating the fixation of the injection molding seat 5 and the injection molding base 3.

[0036] The discharge end of each of the discharge holes 5-5 is an arc structure 5-7, and the arc structure 5-7 is in interference contact with the aluminum metal skeleton 8. The arc structure 5-7 increases the contact area with the aluminum metal skeleton 8, reducing the pressure under a certain pressure and avoiding the risk of fracture of the aluminum metal skeleton 8.

[0037] A method for using a forming mold for a rubber sealing product of a housing type according to the present invention, the method comprising the following steps:

[0038] S1: Install the mandrel 7 on the base 1;

[0039] S2: Insert the inner diameter of the lower end of the aluminum metal skeleton 8 onto the outer diameter of the upper end of the mandrel 7 and then position it on the base 1. The mandrel 7 plays a role in radially positioning the aluminum metal skeleton 8;

[0040] S3: Install and fix the injection molding seat 5 and the injection molding base 3;

[0041] S4: Install and fix the injection molding base 3, the adapter seat 2 and the base 1 in sequence, and place the injection molding seat 5 on the upper end of the aluminum metal skeleton 8;

[0042] S5: Place rubber into the material chamber 5-2 of the injection molding seat 5;

[0043] S6: Insert the insertion part at the lower end of the injection molding plug 6 into the material chamber 5-2 of the injection molding seat 5 with a gap;

[0044] S7: Install and fix the injection molding pressing plate 4 and the injection molding base 3;

[0045] S8: Apply pressure to the injection molding pressing plate 4 through vulcanization equipment, so that the rubber enters the interior of the aluminum metal skeleton 8 through the discharge holes 5-5 of the injection molding seat 5, and discharge the gas through the exhaust holes 5-1 to complete vulcanization molding.

[0046] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0047] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A forming mold for a rubber sealing product of a shell type, characterized in that: It includes a base (1), an adapter base (2), an injection molding base (3), an injection molding pressing plate (4), an injection molding seat (5), an injection molding plug (6) and a mandrel (7); the base (1), the adapter base (2), the injection molding base (3) and the injection molding pressing plate (4) are stacked and fixedly connected in sequence from bottom to top. The middle part of the base (1) is inserted into the mandrel (7) with a clearance. The adapter base (2) is of a rectangular frame structure. The middle part of the injection molding base (3) is inserted into the injection molding seat (5) with a clearance. The middle part of the injection molding pressing plate (4) is inserted into the injection molding plug (6) with a clearance. The injection molding plug (6) is used in cooperation with the injection molding seat (5), and the injection molding seat (5) is arranged corresponding to the mandrel (7).

2. A forming die for a rubber sealing product of a housing type according to claim 1, characterized in that: The injection molding seat (5) is a columnar structure with a T-shaped cross-section. An exhaust hole (5-1) is provided at the upper end of the middle part of the injection molding seat (5), and an avoidance groove (5-6) is provided at the lower end of the middle part of the injection molding seat (5). The avoidance groove (5-6) is communicated with the exhaust hole (5-1); a circular material chamber (5-2) is provided on the upper surface of the injection molding seat (5). A plurality of material passing holes (5-4) are provided on the bottom surface of the material chamber (5-2). An outlet hole (5-5) is provided on the bottom surface of each material passing hole (5-4). Each outlet hole (5-5) penetrates through the lower surface of the injection molding seat (5). Fillets are processed at the joints of the material chamber (5-2), the material passing holes (5-4) and the outlet holes (5-5).

3. A molding die for a rubber sealing product of a housing type according to claim 2, characterized in that: The outlet end of each outlet hole (5-5) is an arc-shaped structure (5-7), and the arc-shaped structure (5-7) is in interference contact with the aluminum metal skeleton (8).

4. A method for using a forming mold for a rubber sealing product of a housing type according to any one of claims 1-3, characterized in that: The method includes the following steps: S1: Install the mandrel (7) on the base (1); S2: Insert the inner diameter of the lower end of the aluminum metal skeleton (8) onto the outer diameter of the upper end of the mandrel (7) and then position it on the base (1); S3: Install and fix the injection molding seat (5) and the injection molding base (3); S4: Install and fix the injection molding base (3), the adapter base (2) and the base (1) in sequence, and place the injection molding seat (5) on the upper end of the aluminum metal skeleton (8); S5: Place rubber into the material chamber (5-2) of the injection molding seat (5); S6: Insert the insertion part at the lower end of the injection molding plug (6) into the material chamber (5-2) of the injection molding seat (5) with a clearance; S7: Install and fix the injection molding pressing plate (4) and the injection molding base (3); S8: Apply pressure to the injection molding pressing plate (4) through vulcanization equipment, so that the rubber enters the inside of the aluminum metal skeleton (8) through the outlet holes (5-5) of the injection molding seat (5), and the gas is discharged through the exhaust holes (5-1) to complete vulcanization molding.

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