A high-temperature and pressure-resistant mold clearing strip

Abstract

This utility model relates to the field of mold clearing strip technology, and discloses a high-temperature and pressure-resistant mold clearing strip, including a strip body, a heat-resistant layer on the side wall of the strip body, a base layer on the side wall of the heat-resistant layer, a pressure-resistant component inside the heat-resistant layer, and a splicing component on the side wall of the strip body; the pressure-resistant component includes a first fixed shell, a connecting block, and a first spring, a side wall of the fixed shell is fixedly connected to the inside of the heat-resistant layer, and the side wall of the connecting block is slidably connected to the inside of the first fixed shell. In this utility model, the two-stage buffer pressure-resistant component composed of the first fixed shell, the connecting block, and the first spring, and the second fixed shell, the connecting rod, and the second spring, enables the strip to absorb pressure layer by layer through the elastic deformation of the double springs when subjected to high mold pressure, thereby achieving the effect of dispersing high pressure and reducing local stress on the strip body, the heat-resistant layer, and the base layer. The above structure improves the pressure resistance stability and service life of the strip.

Description

Technical Field

[0001] This utility model relates to the field of mold clearing strip technology, and in particular to a high temperature and pressure resistant mold clearing strip. Background Technology

[0002] In industrial production processes such as injection molding and die casting, molds, as core components, frequently endure high-temperature and high-pressure environments, and their surfaces are prone to retaining impurities such as molten plastic and metal fragments, affecting product molding quality. Therefore, mold cleaning strips, as key components for mold cleaning and sealing, must possess both excellent high-temperature resistance (resisting the continuous high temperatures during mold operation) and pressure resistance (withstanding the instantaneous high pressure during mold opening and closing) to ensure stable mold cleaning and sealing functions during long-term use, reducing production downtime and mold damage caused by strip failure.

[0003] In existing technologies, mold-clearing strips are typically made of a single rubber material (such as fluororubber or silicone rubber) through compression molding. Some products add fiber reinforcement layers or rigid skeletons inside the rubber to improve structural strength. The technical principle mainly relies on the elastic deformation of the rubber itself to achieve sealing and cushioning, the high-temperature resistance of the material itself (such as the thermal stability of rubber molecular chains) to resist high-temperature aging, and the mechanical support of the reinforcement layer to improve the overall compression resistance.

[0004] However, in practical applications, existing mold clearing strips rely solely on the rubber body or a single reinforcing structure to disperse pressure. When the mold closes and generates instantaneous high pressure, the strip is prone to excessive deformation or even tearing due to stress concentration, resulting in insufficient pressure resistance. Especially under long-term, high-frequency, and high-pressure action, the service life of the strip is significantly shortened. Frequent replacement not only increases production costs but also affects production efficiency. Therefore, a high-temperature and high-pressure resistant mold clearing strip is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a high-temperature and pressure-resistant mold clearing strip, which aims to improve the problem that the existing mold clearing strip is prone to deformation or damage under high pressure due to excessive local stress.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-temperature and pressure-resistant mold clearing strip includes a strip body, a heat-resistant layer is provided on the side wall of the strip body, a base layer is provided on the side wall of the heat-resistant layer, a pressure-resistant component is provided inside the heat-resistant layer, and a splicing component is provided on the side wall of the strip body.

[0008] The pressure-resistant component includes a fixed shell, a connecting block, and a spring. One side wall of the fixed shell is fixedly connected to the inside of the heat-resistant layer. The side wall of the connecting block is slidably connected to the inside of the fixed shell. The upper end of the connecting block is fixedly connected to the lower part of the rubber strip body. The spring is disposed inside the fixed shell. One end of the spring is fixedly connected to the inside of the fixed shell, and the other end of the spring is fixedly connected to the side wall of the connecting block. An installation cavity is formed inside the heat-resistant layer, and the fixed shell is located inside the installation cavity.

[0009] As a further description of the above technical solution:

[0010] The splicing component includes a tenon and a dovetail groove. The tenon is fixedly connected to one end of the adhesive strip body, and the dovetail groove is formed at the other end of the adhesive strip body.

[0011] As a further description of the above technical solution:

[0012] A connecting rod is rotatably connected to one side wall of the fixed shell, and a second fixed shell is slidably connected to the side wall of the connecting rod. One end of the second fixed shell is rotatably connected to the lower part of the rubber strip body. A second spring is provided inside the second fixed shell. One end of the second spring is fixedly connected to the inside of the second fixed shell, and the other end of the second spring is fixedly connected to the side wall of the connecting rod.

[0013] As a further description of the above technical solution:

[0014] A sealing gasket is provided inside the rubber strip body, and the sealing gasket is located inside the dovetail groove.

[0015] As a further description of the above technical solution:

[0016] The tenon is dovetail-shaped, and the inclined sidewalls of the tenon are all fixedly connected with anti-loosening teeth.

[0017] As a further description of the above technical solution:

[0018] The sealing gasket is used to seal the connection when adjacent rubber strip bodies engage with each other via a tenon and a dovetail groove.

[0019] As a further description of the above technical solution:

[0020] The adhesive strip body is made of polytetrafluoroethylene, the heat-resistant layer is made of silicone rubber, and the base layer is made of fiberglass cloth and high-temperature resistant adhesive. The adhesive strip body, the heat-resistant layer, and the base layer are bonded together by adhesive.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, a two-stage buffer pressure-resistant assembly consisting of a fixed shell one, a connecting block, a spring one, a fixed shell two, a connecting rod, and a spring two enables the rubber strip to absorb pressure layer by layer through the elastic deformation of the double springs when subjected to high pressure from the mold. This achieves the effect of dispersing high pressure and reducing local stress on the rubber strip body, heat-resistant layer, and base layer, thus solving the problem that existing mold clearing rubber strips are prone to deformation or damage due to excessive local stress under high pressure. The above structure improves the pressure resistance stability and service life of the rubber strip.

[0023] 2. In this utility model, the initial engagement is achieved by matching the shapes of the tenon and the dovetail groove. The anti-loosening teeth increase friction and the sealing gasket fills the gaps, so that the multi-segment rubber strips can be firmly spliced ​​and not easily loosened, and the joints can be sealed and leak-proof. This achieves the effect of modular adaptation to different mold sizes and reliable splicing, solving the problem that existing mold clearing rubber strips are easy to loosen or have poor sealing after splicing. The above structure improves the installation adaptability and reliability of the rubber strips. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a high-temperature and pressure-resistant mold clearing strip proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the side section of the rubber strip body of the high temperature and pressure resistant mold clearing rubber strip proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the fixing shell of the high temperature and pressure resistant mold clearing strip proposed in this utility model;

[0027] Figure 4 This is a top view structural diagram of a high-temperature and pressure-resistant mold clearing strip proposed in this utility model;

[0028] Figure 5 This is an exploded view of the structure of a high-temperature and pressure-resistant mold clearing strip proposed in this utility model.

[0029] Legend:

[0030] 1. Rubber strip body; 2. Heat-resistant layer; 3. Base layer; 4. Installation cavity; 5. Fixing shell one; 6. Connecting block; 7. Spring one; 8. Fixing shell two; 9. Connecting rod; 10. Spring two; 11. Tenon; 12. Dovetail groove; 13. Sealing gasket; 14. Anti-loosening tooth. Detailed Implementation

[0031] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-5 This utility model provides an embodiment of a high-temperature and pressure-resistant mold clearing strip, comprising a strip body 1, a heat-resistant layer 2 provided on the side wall of the strip body 1, the heat-resistant layer 2 being used to enhance the high-temperature resistance of the overall structure, maintain elasticity in high-temperature environments, and prevent the strip from hardening and failing due to high temperatures; a base layer 3 provided on the side wall of the heat-resistant layer 2, the base layer 3 being used to directly contact the mold surface, withstand the pressure and friction of the mold, and prevent the strip from tearing as a whole; a pressure-resistant component provided inside the heat-resistant layer 2, the pressure-resistant component being used to disperse the high pressure generated when the mold is closed, and improve the pressure resistance of the strip; and a splicing component provided on the side wall of the strip body 1, the splicing component being used to realize the modular connection of multiple strip segments, adapting to molds of different sizes.

[0033] The pressure-resistant component includes a fixed shell 5, a connecting block 6, and a spring 7. The side wall of the fixed shell 5 is fixedly connected to the inside of the heat-resistant layer 2. The fixed shell 5 provides installation and limiting space for the connecting block 6 and the spring 7. The side wall of the connecting block 6 is slidably connected to the inside of the fixed shell 5. The upper end of the connecting block 6 is fixedly connected to the bottom of the rubber strip body 1. The connecting block 6 is used to transmit the pressure on the rubber strip body 1 to the spring 7 to achieve pressure buffering. The spring 7 is located inside the fixed shell 5. One end of the spring 7 is fixedly connected to the inside of the fixed shell 5, and the other end of the spring 7 is fixedly connected to the side wall of the connecting block 6. The spring 7 is used to absorb pressure through elastic deformation to reduce the direct pressure deformation of the rubber strip body 1. The heat-resistant layer 2 has an installation cavity 4, which is used to accommodate the pressure-resistant component. The fixed shell 5 is located inside the installation cavity 4.

[0034] A connecting rod 9 is rotatably connected to the side wall of fixed shell 5. A fixed shell 8 is slidably connected to the side wall of connecting rod 9. One end of fixed shell 8 is rotatably connected to the bottom of rubber strip body 1. Fixed shell 8, together with connecting rod 9, achieves multi-angle pressure transmission. A spring 10 is installed inside fixed shell 8. One end of spring 10 is fixedly connected to the inside of fixed shell 8, and the other end of spring 10 is fixedly connected to the side wall of connecting rod 9. Spring 10 is used to form a secondary buffer with spring 7 to further absorb pressure and improve pressure resistance. Connecting block 6 slides and extends with spring 7 to achieve the effect of primary buffer pressure reduction. Connecting rod 9 slides and rotates with fixed shell 8 and spring 10 to achieve the effect of secondary buffer pressure reduction. Spring 7 and spring 10 work together to form a secondary buffer structure to disperse high pressure and reduce local stress.

[0035] The rubber strip body 1 is made of polytetrafluoroethylene, which provides basic high temperature resistance and chemical corrosion resistance. The heat-resistant layer 2 is made of silicone rubber, which enhances the overall high temperature resistance and maintains elasticity. The base layer 3 is made of fiberglass cloth and high temperature resistant adhesive, which improves the overall structural strength and wear resistance. The rubber strip body 1, heat-resistant layer 2, and base layer 3 are bonded together with adhesive to ensure the tight bonding of the multi-layer structure and prevent delamination under high temperature and pressure, thereby improving the overall structural stability.

[0036] Reference Figures 2-4 The splicing component includes a tenon 11 and a dovetail groove 12. The tenon 11 is fixedly connected to one end of the rubber strip body 1. The tenon 11 is used to cooperate with the dovetail groove 12 to achieve splicing of multiple rubber strips, ensuring the initial positioning and fixing effect of the connection. The dovetail groove 12 is opened at the other end of the rubber strip body 1. The dovetail groove 12 is used to accommodate the tenon 11. Through shape matching, a mechanical interlock is formed to prevent lateral detachment after splicing. A sealing gasket 13 is provided inside the rubber strip body 1. The sealing gasket 13 is located inside the dovetail groove 12. The sealing gasket 13 is used to seal the connection when adjacent rubber strip bodies 1 are engaged by the tenon 11 and the dovetail groove 12, to prevent material leakage from the gap in the mold and improve the sealing performance of the splicing part. The tenon 11 is dovetail-shaped, and anti-loosening teeth 1 are fixedly connected to the inclined side walls of the tenon 11. 4. The anti-loosening teeth 14 are used to increase the friction between the tenon 11 and the inner wall of the dovetail groove 12, preventing the rubber strip from loosening during mold vibration after splicing, and enhancing the stability of the connection; the tenon 11 and the dovetail groove 12 perform an insertion and engagement movement, achieving the effect of rapid splicing and initial fixation; the anti-loosening teeth 14 and the inner wall of the dovetail groove 12 engage, achieving the effect of preventing the spliced ​​parts from loosening; the sealing gasket 13 and the tenon 11 and the dovetail groove 12 engage and deform, achieving the effect of filling the splicing gap and strengthening the seal; the tenon 11, the dovetail groove 12, the anti-loosening teeth 14, and the sealing gasket 13 work together to form a complete splicing structure, achieving the effect of modular connection, stability and reliable sealing; the sealing gasket 13 is made of high-temperature resistant elastic material, and its function is to maintain elastic sealing performance at high temperatures.

[0037] Working principle: The rubber strip body 1 is made of polytetrafluoroethylene, which has basic high temperature resistance and chemical corrosion resistance. The heat-resistant layer 2 and the base layer 3 are arranged in sequence on its outer side. The heat-resistant layer 2 is made of silicone rubber, which further enhances the overall high temperature resistance and can maintain elasticity in high temperature environment to prevent the rubber strip from hardening or deforming due to high temperature. The base layer 3 is made of fiberglass cloth and high temperature resistant adhesive, which is in direct contact with the mold surface. The high strength of fiberglass can withstand the mold pressure and prevent the rubber strip from tearing. At the same time, the adhesive ensures a tight connection between the base layer 3 and the heat-resistant layer 2, improving the structural stability.

[0038] The mounting cavity 4 inside the heat-resistant layer 2 provides installation space for the pressure-resistant components. When the rubber strip is subjected to high pressure from the mold closure, the rubber strip body 1 transmits pressure downwards, causing the connecting block 6 to slide into the fixed shell 5, compressing the spring 7. The spring 7 absorbs part of the pressure through its own elastic deformation, forming a primary buffer to reduce the direct pressure deformation of the rubber strip body 1. At the same time, the pressure of the rubber strip body 1 is transmitted to the connecting rod 9 through the fixed shell 8, causing the connecting rod 9 to slide into the fixed shell 8 and compress the spring 10. The spring 10 further absorbs the pressure, forming a secondary buffer, which, together with the spring 7, disperses the high pressure, preventing the heat-resistant layer 2 or the base layer 3 from being damaged due to excessive local stress. After the pressure disappears, the rebound force of the spring 7 and the spring 10 pushes the connecting block 6 and the connecting rod 9 to reset, causing the rubber strip body 1 to return to its original shape, ensuring the reusability of the rubber strip.

[0039] The rubber strip body 1 achieves modular connection through the splicing assembly composed of tenon 11 and dovetail groove 12. When multiple rubber strips need to be spliced, the tenon 11 of one rubber strip is aligned with the dovetail groove 12 of another rubber strip. The dovetail structure of the tenon 11 matches the shape of the dovetail groove 12 to achieve initial engagement. The anti-loosening teeth 14 on the inclined side wall of the tenon 11 engage with the inner wall of the dovetail groove 12 to increase the friction after splicing and prevent the rubber strip from loosening during the vibration of the mold opening and closing. The sealing gasket 13 inside the dovetail groove 12 is squeezed and deformed by the tenon 11 to fill the splicing gap and prevent the material in the mold, such as plastic melt and debris, from leaking from the joint. At the same time, it enhances the high temperature resistance and sealing of the splicing part.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-temperature and pressure-resistant mold clearing strip, comprising a strip body (1), characterized in that: The side wall of the adhesive strip body (1) is provided with a heat-resistant layer (2), the side wall of the heat-resistant layer (2) is provided with a base layer (3), the interior of the heat-resistant layer (2) is provided with a pressure-resistant component, and the side wall of the adhesive strip body (1) is provided with a splicing component. The pressure-resistant component includes a fixed shell (5), a connecting block (6), and a spring (7). The side wall of the fixed shell (5) is fixedly connected to the inside of the heat-resistant layer (2). The side wall of the connecting block (6) is slidably connected to the inside of the fixed shell (5). The upper end of the connecting block (6) is fixedly connected to the bottom of the rubber strip body (1). The spring (7) is disposed inside the fixed shell (5). One end of the spring (7) is fixedly connected to the inside of the fixed shell (5), and the other end of the spring (7) is fixedly connected to the side wall of the connecting block (6). An installation cavity (4) is provided inside the heat-resistant layer (2), and the fixed shell (5) is located inside the installation cavity (4).

2. The high-temperature and pressure-resistant mold clearing strip according to claim 1, characterized in that: The splicing component includes a tenon (11) and a dovetail groove (12). The tenon (11) is fixedly connected to one end of the adhesive strip body (1), and the dovetail groove (12) is opened at the other end of the adhesive strip body (1).

3. The high-temperature and pressure-resistant mold clearing strip according to claim 1, characterized in that: A connecting rod (9) is rotatably connected to the side wall of the first fixed shell (5), and a second fixed shell (8) is slidably connected to the side wall of the connecting rod (9). One end of the second fixed shell (8) is rotatably connected to the bottom of the rubber strip body (1). A second spring (10) is provided inside the second fixed shell (8). One end of the second spring (10) is fixedly connected to the inside of the second fixed shell (8), and the other end of the second spring (10) is fixedly connected to the side wall of the connecting rod (9).

4. The high-temperature and pressure-resistant mold-clearing strip according to claim 2, characterized in that: The adhesive strip body (1) is provided with a sealing gasket (13) inside, and the sealing gasket (13) is located inside the dovetail groove (12).

5. The high-temperature and pressure-resistant mold clearing strip according to claim 4, characterized in that: The tenon (11) is dovetail shaped, and anti-loosening teeth (14) are fixedly connected to the inclined sidewalls of the tenon (11).

6. The high-temperature and pressure-resistant mold clearing strip according to claim 4, characterized in that: The sealing gasket (13) is used to seal the connection when the adjacent rubber strip bodies (1) are engaged with the dovetail groove (12) by the tenon (11).

7. The high-temperature and pressure-resistant mold clearing strip according to claim 1, characterized in that: The adhesive strip body (1) is made of polytetrafluoroethylene, the heat-resistant layer (2) is made of silicone rubber, and the base layer (3) is made of fiberglass cloth and high-temperature resistant adhesive. The adhesive strip body (1), the heat-resistant layer (2), and the base layer (3) are bonded together by adhesive.

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