A mold ejection structure with a seal

Abstract

The utility model discloses a mould ejection structure with sealing element, including setting in the fixed template bottom end's movable template, setting in the fixed template and movable template between the mould cavity, the bottom of fixed template and movable template is provided with the ejection mechanism, the ejection mechanism is by a plurality of reset spring, a plurality of tappet, upper top plate, lower top plate, a plurality of top plate guide rod is composed, the lower top plate sets up in the bottom of upper top plate, a plurality of tappet sets up between upper top plate and movable template, the sealing mechanism that the utility model discloses designs is for sealing ring, reinforcing seal assembly combination, forms multiple sealed contact through reinforcing seal assembly and mould wall, compared with traditional flat mouth sealing ring, can be under the self -adaptation of injection high pressure and die wall, even if the mould produces trace deformation because of temperature change, the elastic deformation ability of lip edge can also maintain the close contact of sealing surface, effectively prevent the leakage of molten material from the gap of sealing element and mould wall.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a mold ejection structure with a sealing element. Background Technology

[0002] The mold ejection structure is a mold component that integrates the functions of "power transmission, motion guidance, and demolding execution". It is widely used in the production of products that need to be sealed, such as rubber seals and oil seals. Its essence is to drive the actuator through a power device to detach the molded product from the mold cavity according to a preset trajectory.

[0003] Existing mold ejection structures require sealing elements within the mold to ensure a tight seal in the molding environment. However, traditional mold ejection structures with sealing elements have several problems. On one hand, the fit between the ejection mechanism and the sealing element is prone to deviation, leading to damage to the sealing element during ejection and affecting its sealing performance. On the other hand, during injection molding and other molding processes, changes in pressure and temperature make it difficult to maintain the seal between the sealing element and the mold, causing molten material to leak. This not only contaminates the internal structure of the mold but may also affect product quality. Therefore, this utility model proposes a mold ejection structure with a sealing element. Utility Model Content

[0004] The purpose of this utility model is to provide a mold ejection structure with a sealing element, so as to solve the problem that the traditional mold ejection structure with a sealing element mentioned in the background art has certain problems in use due to insufficient sealing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mold ejection structure with a sealing element, comprising a movable mold plate disposed at the bottom end of a fixed mold plate, and a mold cavity disposed between the fixed mold plate and the movable mold plate. An ejection mechanism is provided at the bottom ends of the fixed mold plate and the movable mold plate. The ejection mechanism consists of multiple return springs, multiple ejector rods, an upper ejector plate, a lower ejector plate, and multiple ejector plate guide rods. The lower ejector plate is disposed at the bottom of the upper ejector plate. The multiple ejector rods are disposed between the upper ejector plate and the movable mold plate. The two ends of each ejector rod penetrate to the inner side of the movable mold plate and the inner side of the lower ejector plate, respectively. The multiple return springs are all sleeved on the surface of the ejector rods. The multiple ejector plate guide rods are disposed at the bottom of the lower ejector plate. A sealing mechanism is provided at the top end of each ejector rod. The sealing mechanism consists of a limiting groove, a sealing ring, and symmetrically arranged reinforcing sealing components. The limiting groove is opened on the inner side of the movable mold plate. The sealing ring is sleeved on the surface of the ejector rod and fixed to the inner wall of the limiting groove. The symmetrically arranged reinforcing sealing components are respectively disposed between the inner sides of the two ends of the sealing ring and the surface of the ejector rod.

[0006] Preferably, the sealing ring has a hollow cylindrical structure.

[0007] Preferably, the outer surface of the sealing ring is in contact with the inner wall of the limiting groove.

[0008] Preferably, the inner surface of the sealing ring is in contact with the end surface of the push rod.

[0009] Preferably, the reinforced sealing assembly consists of a reinforced sealing base and a reinforced sealing lip, wherein the reinforced sealing base is fixed to the inner wall of the sealing ring, and the reinforced sealing lip is fixed to the inner side of the reinforced sealing base.

[0010] Preferably, the sealing ring has a metal support inside, which consists of a mounting groove and a support body. The mounting groove is located inside the sealing ring, and the support body is located inside the mounting groove.

[0011] Preferably, the mounting slot consists of a frame and multiple metal reinforcement components, with the multiple metal reinforcement components installed on the inner side of the frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The sealing mechanism designed in this invention combines a sealing ring and a reinforced sealing component. The reinforced sealing component forms multiple sealing contacts with the mold wall. Compared with traditional flat-mouth sealing rings, it can adaptively conform to the mold wall under the high pressure of injection molding. Even if the mold undergoes slight deformation due to temperature changes, the elastic deformation capability of the lip can maintain tight contact of the sealing surface, effectively preventing molten material from leaking through the gap between the seal and the mold wall. Furthermore, by setting a metal support inside the sealing ring, it avoids the tendency of traditional pure rubber sealing rings to soften under high injection molding temperatures and to compress and deform under high pressure, which would lead to an increase in the sealing gap with the mold wall and cause material leakage. The metal support has high strength and high temperature resistance, and can serve as a "rigid skeleton" for the sealing ring, limiting excessive deformation of the sealing ring under extreme working conditions. This ensures that the reinforced sealing component is always tightly fitted to the mold wall, avoiding gaps on the sealing surface and fundamentally solving the problem of "sealing failure caused by high temperature and high pressure". Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged schematic diagram of region A in the diagram;

[0016] Figure 3 This is a cross-sectional schematic diagram of the sealing mechanism of this utility model;

[0017] Figure 4 This utility model Figure 3 Enlarged schematic diagram of region B in the diagram;

[0018] Figure 5This is a schematic diagram of the support body structure of this utility model;

[0019] In the diagram: 1. Fixed template; 2. Moving template; 3. Mold cavity; 4. Ejection mechanism; 41. Return spring; 42. Ejector rod; 43. Upper ejector plate; 44. Lower ejector plate; 45. Ejector plate guide rod; 5. Sealing mechanism; 51. Limiting groove; 52. Sealing ring; 53. Reinforced sealing assembly; 531. Reinforced sealing base; 532. Reinforced sealing lip; 54. Metal support frame; 541. Mounting groove; 542. Support frame body; 5421. Frame; 5422. Metal reinforcement component. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 5This utility model provides a technical solution: a mold ejection structure with a sealing element, including a movable mold plate 2 disposed at the bottom end of a fixed mold plate 1, a mold cavity 3 disposed between the fixed mold plate 1 and the movable mold plate 2, and an ejection mechanism 4 disposed at the bottom end of the fixed mold plate 1 and the movable mold plate 2. The ejection mechanism 4 is composed of multiple return springs 41, multiple ejector rods 42, an upper ejector plate 43, a lower ejector plate 44, and multiple ejector plate guide rods 45. The lower ejector plate 44 is disposed at the bottom of the upper ejector plate 43, and the multiple ejector rods 42 are disposed between the upper ejector plate 43 and the movable mold plate 2. The two ends of the ejector rods 42 respectively penetrate to the inner side of the movable mold plate 2 and the inner side of the lower ejector plate 44. The multiple return springs 41 are all sleeved on the surface of the ejector rods 42, and the multiple ejector plate guide rods 45 are disposed at the bottom of the lower ejector plate 44. A sealing mechanism 5 is provided at the end, which consists of a limiting groove 51, a sealing ring 52, and symmetrically arranged reinforcing sealing components 53. The limiting groove 51 is opened on the inner side of the moving mold plate 2, and the sealing ring 52 is sleeved on the surface of the ejector rod 42 and fixed to the inner wall of the limiting groove 51. When the fixed mold plate 1 and the moving mold plate 2 are closed to form a sealed mold cavity 3, the sealing ring 52 is tightly fitted with the mold wall. Under the action of its own elasticity and the mold closing pressure, the lip of the reinforcing sealing component 532 forms a reliable sealing contact with the mold wall, preventing external impurities from entering the mold cavity 3. At the same time, it provides a sealing guarantee for maintaining pressure in the subsequent injection molding process and prevents leakage of molten material. During the process of the injection molding machine injecting molten material into the mold cavity 3, the internal pressure of the mold cavity 3 increases, and the sealing ring 52... Relying on the elasticity of its own material and the support of the metal support 54, it can effectively resist pressure. The reinforced sealing lip 532 remains tightly fitted to the mold wall, preventing material leakage from the gap between the sealing ring 52 and the mold wall, ensuring product molding quality. After injection molding, the mold opens, and the fixed mold plate 1 separates from the moving mold plate 2. When the ejector mechanism 4 drives the ejector rod 42 to eject the product, the ejector rod 42 moves inside the sealing ring 52. Due to the precise installation and positioning and its own elasticity, the reinforced sealing lip 532 can maintain a good shape, avoiding excessive deformation or damage, ensuring its subsequent sealing performance. The symmetrically arranged reinforced sealing components 53 are respectively set between the inner sides of both ends of the sealing ring 52 and the surface of the ejector rod 42. The sealing lip 53 designed in this utility model... The sealing mechanism 5 combines a sealing ring 52 and a reinforced sealing component 53. The reinforced sealing component 53 forms multiple sealing contacts with the mold wall. Compared to traditional flat-mouth sealing rings, it can adaptively conform to the mold wall under high injection pressure. Even if the mold undergoes slight deformation due to temperature changes, the elastic deformation capability of the lip maintains tight contact between the sealing surfaces, effectively preventing molten material from leaking through the gap between the seal and the mold wall. The sealing ring 52 has a hollow cylindrical structure. The outer surface of the sealing ring 52 conforms to the inner wall of the limiting groove 51, and the inner surface of the sealing ring 52 conforms to the end surface of the ejector rod 42. The reinforced sealing component 53 consists of a reinforced sealing base 531 and a reinforced sealing lip 532. The reinforced sealing base 531 is fixed to the inner wall of the sealing ring 52.The reinforcing seal lip 532 is fixed to the inner side of the reinforcing seal base 531. A metal support 54 is provided inside the sealing ring 52. The metal support 54 consists of a mounting groove 541 and a support body 542. The mounting groove 541 is located inside the sealing ring 52, and the support body 542 is located inside the mounting groove 541. The mounting groove 541 consists of a frame 5421 and multiple metal reinforcement members 5422. The multiple metal reinforcement members 5422 are installed inside the frame 5421 and pass through the sealing ring 52. An internal metal support frame 54 is incorporated to prevent traditional pure rubber sealing rings from softening under high injection molding temperatures and compressing and deforming under high pressure, which could lead to increased sealing gaps with the mold wall and material leakage. The metal support frame 54 possesses high strength and high-temperature resistance, serving as a "rigid skeleton" for the sealing ring 52. This limits excessive deformation of the sealing ring 52 under extreme conditions, ensuring that the reinforced sealing component 53 remains tightly fitted to the mold wall, preventing gaps on the sealing surface, and fundamentally solving the problem of "sealing failure due to high temperature and high pressure."

[0022] The working principle and usage process of this utility model: The injection molding machine injects molten material into the mold cavity 3 through the gating system. During the injection process, the pressure inside the mold cavity 3 increases. The sealing mechanism 5 can effectively resist the pressure and prevent the material from leaking from the gap between the sealing ring 52 and the mold wall. Since the sealing ring 52 is precisely installed and positioned, it can remain stable under high pressure and ensure the molding quality of the product.

[0023] After injection molding is completed, the mold enters the mold opening state, the fixed platen 1 separates from the moving platen 2, exposing the molded product and the end of the ejector pin 42. At this time, the ejection mechanism 4 starts to work, and the ejection power of the injection molding machine is transmitted to the upper ejector plate 43 and the lower ejector plate 44. Under the guidance of the ejector plate guide rod 45, the upper ejector plate 43 and the lower ejector plate 44 drive the ejector pin 42 to move upward. The ejector pin 42 smoothly ejects the product from the mold cavity 3. During the ejection process, the return spring 41 is compressed and stores the energy for return.

[0024] After ejection, the ejection mechanism 4, under the elastic restoring force of the return spring 41, pushes the upper ejector plate 43 and the lower ejector plate 44, causing the ejector rod 42 to return to its initial position along the ejector plate guide rod 45, preparing for the next mold closing injection. At the same time, the sealing mechanism 5 also returns to its initial state, waiting for the installation of the next sealing ring 52. The entire workflow is repeated cyclically, achieving an efficient and stable production process.

[0025] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold ejection structure with a seal, comprising a movable mold plate (2) disposed at the bottom end of a fixed mold plate (1) and a mold cavity (3) disposed between the fixed mold plate (1) and the movable mold plate (2), characterized in that: The fixed template (1) and the moving template (2) are provided with an ejection mechanism (4) at their bottom ends. The ejection mechanism (4) consists of multiple return springs (41), multiple ejector rods (42), an upper top plate (43), a lower top plate (44), and multiple top plate guide rods (45). The lower top plate (44) is located at the bottom of the upper top plate (43). The multiple ejector rods (42) are located between the upper top plate (43) and the moving template (2). The two ends of the ejector rods (42) pass through the inner side of the moving template (2) and the inner side of the lower top plate (44), respectively. The multiple return springs (41) are all sleeved on the ejector rods (42). On the surface of the top plate, multiple top plate guide rods (45) are disposed at the bottom of the lower top plate (44). The top of the top rod (42) is provided with a sealing mechanism (5). The sealing mechanism (5) consists of a limiting groove (51), a sealing ring (52), and symmetrically arranged reinforcing sealing components (53). The limiting groove (51) is opened on the inner side of the moving template (2). The sealing ring (52) is sleeved on the surface of the top rod (42) and fixed to the inner wall of the limiting groove (51). The symmetrically arranged reinforcing sealing components (53) are respectively disposed between the inner sides of the two ends of the sealing ring (52) and the surface of the top rod (42).

2. The mold ejection structure with a sealing element according to claim 1, characterized in that: The sealing ring (52) has a hollow cylindrical structure.

3. The mold ejection structure with a sealing element according to claim 1, characterized in that: The outer surface of the sealing ring (52) is in contact with the inner wall of the limiting groove (51).

4. The mold ejection structure with a sealing element according to claim 1, characterized in that: The inner surface of the sealing ring (52) is in contact with the end surface of the push rod (42).

5. The mold ejection structure with a sealing element according to claim 1, characterized in that: The reinforced sealing assembly (53) consists of a reinforced sealing base (531) and a reinforced sealing lip (532). The reinforced sealing base (531) is fixed to the inner wall of the sealing ring (52), and the reinforced sealing lip (532) is fixed to the inner side of the reinforced sealing base (531).

6. The mold ejection structure with a sealing element according to claim 1, characterized in that: The sealing ring (52) is provided with a metal support (54) inside. The metal support (54) consists of a mounting groove (541) and a support body (542). The mounting groove (541) is opened on the inner side of the sealing ring (52), and the support body (542) is disposed inside the mounting groove (541).

7. The mold ejection structure with a sealing element according to claim 6, characterized in that: The mounting slot (541) consists of a frame (5421) and multiple metal reinforcements (5422), with the multiple metal reinforcements (5422) installed on the inner side of the frame (5421).

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