A PEEK-based mold encapsulation structure

Abstract

The utility model discloses a mould glue sealing structure based on PEEK relates to mould sealing technical field, including the upper die blanking plate, the upper surface sliding of upper die blanking plate is equipped with symmetrical middle die haaf, is equipped with a plurality of evenly distributed first positioning hole on the upper die blanking plate, and the first positioning hole is equipped with the cooperation upper model core, and the lower part of upper model core is equipped with the cooperation main spring, the inside of main spring is equipped with the inner tube framework, the upper end through -hole of inner tube framework is equipped with the matching upper die positioning pin, the surface of one end of upper die positioning pin and lower die positioning pin is far away from each other and is equipped with a circle PEEK sealing ring, the utility model discloses the surface of PEEK sealing ring and main spring is pasted together, and is for interference fit, and the connecting gap of covering positioning pin and inner tube framework is avoided to cause the damage to the gold utensil, reduces the appearance change of gold utensil, the problem such as insufficient and rust of the area of conclusion, reduces the production of gold utensil end face rubber, spits the time of end face deburring, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold sealing technology, specifically a mold sealing structure based on PEEK. Background Technology

[0002] In bushing production in the automotive, machinery and other fields, the mold sealing structure is the core part to ensure the quality of bushing vulcanization molding. Its main function is to seal the mold cavity and the connection gap between the component during the bushing vulcanization process to prevent rubber material from overflowing. At the same time, it is necessary to avoid damage to the bushing hardware and ensure that the product appearance, structural strength and production efficiency meet the needs of industrial mass production.

[0003] Existing bushing production molds mostly adopt a quenched part flat or beveled edge interference sealing structure (reference) Figure 6 As shown in the figure, sealing is achieved through the rigid bonding of quenched metal parts with the surface of fittings; however, this technology has obvious drawbacks: on the one hand, the quenched parts are made of rigid metal, and under the action of mold opening and closing and vulcanization pressure, the rigid contact between them and the surface of fittings can easily cause scratches and deformation of fittings, resulting in damage to the appearance of fittings. At the same time, it may damage the bonding surface between fittings and rubber, causing insufficient bonding area. Long-term use will also cause rust due to metal wear, further affecting product quality; on the other hand, interference sealing of quenched parts relies on high-precision machining of metal parts. Once wear or deformation occurs, the whole part needs to be replaced, resulting in high maintenance costs. In addition, the traditional structure is prone to producing excess rubber on the end face of fittings, requiring manual deburring, increasing process time, reducing production efficiency, and its adaptability is limited, making it difficult to meet the sealing needs of vulcanized products of different specifications.

[0004] Patent CN208555931U discloses a mold sealing structure, which includes a fixed mold fixing plate. A slanted guide post is inserted and installed on one side of the fixed mold fixing plate, and a slanted slider is inserted and fitted at one end of the slanted guide post. A countersunk hole is opened on one side of the fixed mold fixing plate, and a fixed mold core is interference-fitted in the countersunk hole. A moving mold core fixing plate is fitted on one side of the fixed mold fixing plate, and a moving mold core is interference-fitted in the countersunk hole. A moving mold core insert and a moving mold core pin are embedded in the moving mold core. A support plate is bolted to the other side of the moving mold core fixing plate. The sealing ring is an O-ring made of perfluororubber (FFKM) material.

[0005] However, this patent has the following drawbacks: the sealing ring in the mold sealing structure is interference-fitted with the hardware structure, which causes scratches and deformation on the surface of the hardware; at the same time, it damages the bonding surface between the hardware and the rubber, resulting in insufficient bonding area. Utility Model Content

[0006] To address the technical challenges in existing technologies, such as the rigid contact between the sealing structure and the fittings, which easily leads to scratches and deformation of the fittings, insufficient bonding area due to damage to the bonding surface between the fittings and rubber, and rusting due to metal wear over long-term use, affecting product quality; the need for complete replacement after deformation results in high maintenance costs, and the generation of excess rubber requires manual deburring, and the limited adaptability reduces production efficiency and makes it difficult to meet the needs of multi-specification vulcanized products; this utility model provides a mold sealing structure based on PEEK.

[0007] The objective of this utility model can be achieved through the following technical solutions: A PEEK-based mold sealing structure includes an upper mold blanking plate, with symmetrical middle mold hinges slidingly mounted on the upper surface of the upper mold blanking plate; multiple evenly distributed first positioning holes are formed on the upper mold blanking plate, and second positioning holes are formed on both sides of the middle mold hinges; a matching upper mold core is placed in the first positioning hole, and a matching lower mold core is placed in the second positioning hole; a matching main spring is provided at the lower part of the upper mold core, and the lower part of the main spring is connected to the lower mold core; an inner cylinder skeleton is provided inside the main spring; a matching upper mold positioning pin is provided in the upper through hole of the inner cylinder skeleton, and a matching lower mold positioning pin is provided in the lower through hole of the inner cylinder skeleton; a PEEK sealing ring is provided on the outer surface of the upper mold positioning pin and the lower mold positioning pin at opposite ends.

[0008] Furthermore, the diameter of the middle part of the first positioning hole and the second positioning hole is smaller than the diameter of the two ends, and the diameter of the two ends of the first positioning hole gradually decreases towards the middle; the shape of the first positioning hole and the second positioning hole is hourglass-shaped.

[0009] Furthermore, the second positioning hole is semi-circular in shape, and the symmetrically arranged middle mold halves can form a complete mold cavity when closed.

[0010] Furthermore, the lower part of the upper mold core is provided with a first concave retaining ring, and the upper part of the lower mold core is provided with a second concave retaining ring.

[0011] Furthermore, the inner cylinder frame has cylindrical ends and a spherical middle section; both ends of the inner cylinder frame are provided with through holes.

[0012] Furthermore, the diameter of the ends of the upper and lower mold positioning pins that are far apart is greater than the diameter of the through hole; the cross-sectional shape of the PEEK sealing ring is L-shaped, with one end of the PEEK sealing ring connected to the upper mold positioning pin and the other end connected to the inner cylinder skeleton.

[0013] Furthermore, the PEEK sealing ring has a chamfer on the outer side of one end near the inner cylinder frame, and the chamfer is matched with the inner cylinder frame.

[0014] The beneficial effects of this utility model are: This invention utilizes a PEEK sealing ring that fits snugly against the surface of the main spring, covering the connection gap between the locating pin and the inner cylinder frame. The PEEK sealing ring, made of resin, effectively prevents damage to the fittings when in contact with the inner cylinder frame surface, reducing issues such as changes in fitting appearance, insufficient bonding area, and rust. The PEEK sealing ring is soft, elastic, and easy to replace, reducing maintenance costs during production. Its design reduces rubber buildup on the fitting end faces, eliminating the need for deburring and improving production efficiency. Furthermore, it is suitable for most vulcanized products, offering wide applicability and strong versatility. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the connection between the main spring and the upper model core of this utility model; Figure 3 for Figure 2 A frontal cross-sectional view; Figure 4 for Figure 2 An explosion diagram; Figure 5 for Figure 3 Enlarged diagram of point A in the diagram; Figure 6 This is a schematic diagram of the prior art interference sealant structure of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Upper die blanking plate; 101. First positioning hole; 2. Middle die half; 201. Second positioning hole; 3. Upper die core; 301. First concave retaining ring; 4. Lower die core; 401. Second concave retaining ring; 5. Main spring; 6. Inner cylinder skeleton; 601. Through hole; 7. Lower die positioning pin; 8. Upper die positioning pin; 9. PEEK sealing ring; 901. Chamfer. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-2As shown, a mold sealing structure based on PEEK includes an upper mold blanking plate 1. The upper mold blanking plate 1 has a plurality of evenly distributed first positioning holes 101. The diameter of the middle part of the first positioning hole 101 is smaller than the diameter of the two ends. The diameter of the two ends of the first positioning hole 101 gradually decreases towards the middle. The shape of the first positioning hole 101 is hourglass-shaped. The upper mold blanking plate 1 is used to fix and position the upper mold core 3, and at the same time provides a sliding track for the middle mold half 2.

[0019] The upper surface of the upper die blanking plate 1 is provided with symmetrical middle die half 2. The middle die half 2 is provided with second positioning holes 201 on both sides. The second positioning holes 201 are semi-circular in shape. The symmetrically arranged middle die half 2 can form a complete mold cavity when closed. The diameter of the two ends of the second positioning hole 201 gradually decreases towards the middle. The shape of the second positioning hole 201 is hourglass-shaped.

[0020] The first positioning hole 101 is used to fit and install the upper model core 3. The "hourglass shape" can limit the vertical displacement of the upper model core 3 and ensure that it does not deviate during operation.

[0021] The second positioning hole 201 is used to fit and install the lower model core 4. The circular structure formed after closing matches the outer contour of the lower model core 4, ensuring that the lower model core 4 is stably fixed in the cavity.

[0022] Please see Figure 3-4 As shown, the first positioning hole 101 is provided with a matching upper mold core 3, and the second positioning hole 201 is provided with a matching lower mold core 4. The lower part of the upper mold core 3 is provided with a first concave retaining ring 301, and the upper part of the lower mold core 4 is provided with a second concave retaining ring 401. The lower part of the upper mold core 3 is provided with a matching main spring 5, and the lower part of the main spring 5 is connected to the lower mold core 4. The main spring 5 is provided with an inner cylinder skeleton 6 inside.

[0023] The first concave retaining ring 301 and the second concave retaining ring 401 are used to clamp the main spring 5 to prevent the main spring 5 from moving up and down during operation and to ensure stable transmission of elastic force.

[0024] The inner cylinder frame 6 has cylindrical shapes at both ends and a spherical shape in the middle. Both ends of the inner cylinder frame 6 are provided with through holes 601. The upper through hole 601 of the inner cylinder frame 6 is provided with a matching upper mold positioning pin 8, and the lower through hole 601 of the inner cylinder frame 6 is provided with a matching lower mold positioning pin 7.

[0025] The upper mold positioning pin 8 and the lower mold positioning pin 7 are connected in series through the through hole 601 to the inner cylinder frame 6, the upper mold blanking plate 1 and the middle mold half 2, ensuring that the central axis of all components is consistent, achieving precise positioning and avoiding misalignment.

[0026] The main spring 5 is sleeved on the outside of the inner cylinder frame 6, with its upper part in contact with the lower part of the upper model core 3 and its lower part in contact with the upper part of the lower model core 4, and is located in the closed space between the upper and lower model cores 4.

[0027] Please see Figure 3 and Figure 5 As shown, the diameter of the ends of the upper mold positioning pin 8 and the lower mold positioning pin 7 that are far apart is greater than the diameter of the through hole 601; a PEEK sealing ring 9 is provided on the surface of the ends of the upper mold positioning pin 8 and the lower mold positioning pin 7 that are far apart, and the cross-sectional shape of the PEEK sealing ring 9 is L-shaped; the PEEK sealing ring 9 is made of German GEHR.

[0028] One end of the PEEK sealing ring 9 is connected to the upper mold positioning pin 8, and the other end is connected to the inner cylinder frame 6. The PEEK sealing ring 9 has a chamfer 901 on the outer side of the end near the inner cylinder frame 6. The shape of the chamfer 901 is consistent with the shape of the inner cylinder frame 6. The chamfer 901 and the PEEK sealing ring 9 are integrally cast. The surface of the PEEK sealing ring 9 is in contact with the surface of the main spring 5 and is an interference fit, covering the connection gap between the positioning pin and the inner cylinder frame 6.

[0029] The PEEK sealing ring 9 is made of resin material. When it comes into contact with the surface of the inner cylinder skeleton 6, it can effectively avoid damage to the hardware and reduce problems such as changes in the appearance of the hardware, insufficient bonding area, and rust.

[0030] PEEK seals 9 have good rigidity and flexibility, are soft and elastic, and are easy to replace, reducing maintenance costs during the production process.

[0031] The design of the PEEK sealing ring 9 reduces the amount of rubber generated on the end face of the hardware, eliminating the time required for deburring the end face, improving production efficiency, and is applicable to most vulcanized products, with a wide range of applications and strong versatility.

[0032] Working principle: When the mold closes, the upper mold blanking plate 1 moves the upper mold core 3 downward, the middle mold half 2 closes symmetrically, and the upper and lower mold cores 4 are aligned with the inner cylinder skeleton 6 through the positioning pins, and the main spring 5 is compressed; during the vulcanization process, the PEEK sealing ring 9 seals the gap through interference fit to prevent rubber from overflowing; when the mold opens, the main spring 5 rebounds and the auxiliary component resets, and the upper mold positioning pin 8 and the lower mold positioning pin 7 do not fall off. The entire structure relies on the positional coordination and functional synergy of each component to achieve efficient and low-damage sealing production.

[0033] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A mold sealing structure based on PEEK, comprising an upper mold blanking plate (1), wherein symmetrical middle mold hangers (2) are slidably disposed on the upper surface of the upper mold blanking plate (1); characterized in that, The upper die blanking plate (1) is provided with a plurality of evenly distributed first positioning holes (101), and the middle die half (2) is provided with second positioning holes (201) on both sides. The first positioning hole (101) is provided with a matching upper die core (3), and the second positioning hole (201) is provided with a matching lower die core (4). The lower part of the upper die core (3) is provided with a matching main spring (5), and the lower part of the main spring (5) is connected to the lower die core (4). The main spring (5) is provided with an inner cylinder skeleton (6). The upper end through hole (601) of the inner cylinder skeleton (6) is provided with a matching upper die positioning pin (8), and the lower end through hole (601) of the inner cylinder skeleton (6) is provided with a matching lower die positioning pin (7). The outer surfaces of the upper die positioning pin (8) and the lower die positioning pin (7) that are far apart are each provided with a PEEK sealing ring (9).

2. The mold sealing structure based on PEEK according to claim 1, characterized in that, The diameter of the middle part of the first positioning hole (101) and the second positioning hole (201) is smaller than the diameter of the two ends. The diameter of the two ends of the first positioning hole (101) is gradually reduced towards the middle. The shape of the first positioning hole (101) and the second positioning hole (201) is hourglass-shaped.

3. The mold sealing structure based on PEEK according to claim 2, characterized in that, The second positioning hole (201) is semi-circular in shape, and the symmetrically arranged middle mold half (2) can form a complete mold cavity in the closed state.

4. The mold sealing structure based on PEEK according to claim 3, characterized in that, The lower part of the upper model core (3) is provided with a first concave retaining ring (301), and the upper part of the lower model core (4) is provided with a second concave retaining ring (401).

5. A mold sealing structure based on PEEK according to claim 4, characterized in that, The inner cylinder frame (6) has cylindrical shapes at both ends and a spherical shape in the middle; both ends of the inner cylinder frame (6) are provided with through holes (601).

6. The mold sealing structure based on PEEK according to claim 5, characterized in that, The diameter of the ends of the upper mold positioning pin (8) and the lower mold positioning pin (7) that are far apart is greater than the diameter of the through hole (601); the cross-sectional shape of the PEEK sealing ring (9) is L-shaped, one end of the PEEK sealing ring (9) is connected to the upper mold positioning pin (8), and the other end is connected to the inner cylinder skeleton (6).

7. A mold sealing structure based on PEEK according to claim 6, characterized in that, The PEEK sealing ring (9) has a chamfer (901) on the outer side of one end near the inner cylinder frame (6), and the chamfer (901) is matched with the inner cylinder frame (6).

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