Mold frame facilitating demolding

Abstract

This application relates to the field of mold base technology, and in particular to a mold base that facilitates demolding. It includes a base, a connecting plate fixed to one side of the top of the base, an injection molding machine body mounted on the upper inner side of the connecting plate, an upper mold fixed to the center of the side of the injection molding machine body opposite to the base, an openable lower mold assembly located inside the upper part of the base, and a secondary lifting assembly located below the openable lower mold assembly. This application reduces the contact area between the lower mold plate and the finished product by opening and closing the openable lower mold assembly, avoiding friction caused by large-area contact, thereby reducing difficulties in the demolding process and making it easier for the finished product to be ejected from the mold, improving production efficiency. Simultaneously, the smaller contact area between the mold and the finished product reduces wear on the mold surface, helps extend the mold's service life, and reduces the frequency of maintenance and mold replacement.

Description

Technical Field

[0001] This application relates to the field of mold base technology, and in particular to a mold base that facilitates demolding. Background Technology

[0002] The mold frame is the skeleton of the entire mold. Its main function is to assemble and fix the various parts of the mold according to certain rules and positions, thereby ensuring that the mold can be correctly installed on the die-casting machine or injection molding machine. However, existing mold frames still have some problems in use. During injection molding or die-casting operations, the molded finished product may move upward with the upper mold or get stuck in the lower mold, making automatic demolding impossible. In this case, workers need to use tools to manually demold to complete the demolding process. This not only significantly reduces work efficiency but also increases the labor intensity of workers.

[0003] A search revealed an existing patent (publication number: CN222115939U) that discloses a mold frame for easy demolding, relating to the field of mold frame technology. The patent includes a base, a support frame at one top end of the base, and hydraulic rods at both ends of the support frame located on one side of the base. The output ends of the two hydraulic rods are fixedly connected to an upper mold. A sliding rod is slidably connected to the center of the upper mold. A first top plate is provided at the bottom of the sliding rod, and a baffle is provided at the top of the sliding rod. A spring is provided around the baffle around the sliding rod. A lower mold is located below the upper mold on the base. A U-shaped frame is slidably connected to the bottom of the lower mold, and a second top plate is provided at the top of the U-shaped frame. A cylinder is located below the U-shaped frame on the base. This invention uses the design of the first top plate to eject finished products stuck in the upper mold and the second top plate to eject finished products stuck in the lower mold, thereby achieving demolding.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: In existing technologies, during the ejection process of a finished product, the contact area between the mold inner wall and the finished product is typically large. Due to the wide contact area, the friction between the finished product and the mold inner wall is strong during ejection, which may cause scratches, deformation, or other types of damage to the surface of the finished product. Such damage not only affects the appearance of the finished product but may also reduce its performance, thereby affecting the quality and market competitiveness of the final product. Utility Model Content

[0005] In order to solve the problems mentioned in the background art, this application provides a mold base that facilitates demolding.

[0006] This application provides a mold frame for easy demolding, which adopts the following technical solution: a mold frame for easy demolding includes a base, a connecting plate is fixed to one side of the top of the base, an injection molding machine body is installed on the upper side of the inner side of the connecting plate, an upper mold is fixed in the center of the side of the injection molding machine body opposite to the base, an openable and closable lower mold assembly is provided inside the upper part of the base, and a secondary lifting assembly is provided below the openable and closable lower mold assembly;

[0007] The openable lower mold assembly includes a base plate that slides vertically inside the base. The side of the base plate is provided with four vertically rotating lower mold templates that are equally distributed at angles. A fixing block is fixed to the outer side of the lower mold template, and an elastic telescopic rod is installed on the inner side of the fixing block. The output end of the elastic telescopic rod is hinged to the fixing block, and a rotating shaft is fixed to the other end of the elastic telescopic rod. The two ends of the rotating shaft are rotatably connected to the inner side of the top of the base.

[0008] The above-described design of the openable lower mold assembly includes a base plate that slides vertically within the base and engages with multiple lower mold templates and elastic telescopic rods. This design reduces the contact area between the lower mold templates and the finished product, thereby reducing friction and facilitating a smoother demolding process. Specifically, the opening and closing of the base plate allows the lower mold templates to automatically separate, reducing contact with the molded product, improving demolding efficiency, and minimizing manual intervention. This design also reduces wear on the mold surface, helping to extend the mold's lifespan and lowering the frequency of maintenance and replacement.

[0009] Optionally, the secondary lifting assembly includes a hydraulic push rod body, which is fixed at the center of the inner bottom wall of the base. A first circular plate is fixed to the output end of the hydraulic push rod body, and a second circular plate is fixed to the top of the first circular plate. Sealing rings are provided on the sides of the first and second circular plates. A square plate is provided on the outer side of the first circular plate, and four L-shaped blocks are fixed to the outer side of the bottom of the square plate at equal angles.

[0010] The above scheme further describes the design of the secondary lifting assembly. This assembly includes a hydraulic push rod body with a circular plate fixed to its output end, featuring a sealing ring and annular groove. This design provides a more precise lifting operation for mold demolding. During demolding, the secondary lifting assembly not only drives the opening and closing of the lower mold platen through the initial lifting but also ensures the finished product smoothly separates from the base plate surface through the secondary lifting. This automated lifting method significantly reduces the need for manual operation, minimizes human error, ensures smooth demolding of the finished product, and effectively prevents the finished product from jamming or sticking, improving production consistency and stability.

[0011] Optionally, a first annular groove is provided on the inner side of the base plate, and the second circular plate is sealed and fitted to the base plate through a sealing ring and the first annular groove.

[0012] The above scheme further explains the design of the first annular groove and sealing ring on the inner side of the base plate. This design provides a better seal, ensuring good sealing during the secondary lifting process, allowing the hydraulic push rod assembly to operate without leakage. This design effectively avoids pressure drops in the hydraulic system due to poor sealing, ensuring the stability of the lifting action and thus guaranteeing a smooth demolding process.

[0013] Optionally, the base plate is in the shape of an isosceles trapezoid, and elastic sealing gaskets are provided on both sides of the base plate.

[0014] The above design incorporates an isosceles trapezoidal base plate with elastic sealing gaskets on both sides. This design improves sealing performance and increases the contact stability between the base plate and the mold. The isosceles trapezoidal shape ensures smooth sliding of the component, while the elastic sealing gaskets further reduce friction between the finished product and the mold, enhancing overall demolding efficiency and preventing deformation or damage to the finished product due to excessive friction.

[0015] Optionally, a second annular groove is provided on the inner side of the square plate, and the surface of the sealing ring on the first circular plate is in sealing contact with the second annular groove.

[0016] Optionally, the base has an internal opening where the side and inner sides of the L-shaped block fit together, and the L-shaped block is slidably connected.

[0017] The above scheme describes the cooperation between the square plate and the L-shaped block. The square plate can slide vertically within the base, and the L-shaped block, through a sliding connection, helps the square plate achieve precise movement. The effect of this design is that the sliding motion of the square plate helps ensure the orderly movement of the entire mold assembly during lifting, avoiding unnecessary deviations and enhancing the accuracy of automated lifting. Through this design, the coordinated action between the square plate and the L-shaped block ensures smoother and more efficient movement during demolding, preventing deviations in the mold during operation and improving the overall stability and production efficiency of the mold.

[0018] Optionally, the square plate slides vertically inside the base, and the sliding distance of the square plate is the same as the sliding distance of the L-shaped block. The top of the maximum sliding height of the square plate is on the same horizontal line as the top of the base.

[0019] The aforementioned solution involves an internal slot in the base, allowing the L-shaped block to slide smoothly into the slot. This design ensures more stable and smooth sliding between the L-shaped block and the square plate, effectively preventing jamming or misalignment caused by uneven sliding. The slot design guarantees precise alignment between components, reducing production problems caused by equipment inaccuracies, thereby improving demolding efficiency and mold reliability.

[0020] In summary, this application includes the following beneficial technical effects:

[0021] 1. This utility model reduces the contact area between the lower mold template and the finished product by opening and closing the lower mold assembly, avoiding the friction generated when there is a large contact area, thereby reducing the difficulty in the demolding process, making it easier for the finished product to be removed from the mold, improving production efficiency. At the same time, the smaller contact area between the mold and the finished product can reduce the wear on the mold surface, help extend the service life of the mold, and reduce the frequency of maintenance and mold replacement.

[0022] 2. This utility model utilizes a secondary lifting component to achieve a secondary lifting operation on the finished product. During the first stage of lifting, the secondary lifting component automatically opens and closes the openable lower mold component, thereby reducing manual intervention and improving production efficiency and consistency. Because the opening and closing action is combined with the lifting operation, the finished product can smoothly eject from the mold, avoiding improper human operation or delays and ensuring the stability of the production process. During the second stage of lifting, the secondary lifting component continues to function, smoothly separating the finished product from the base plate surface, avoiding adhesion or jamming. Overall, this automated lifting design improves production efficiency, ensures smooth demolding of the finished product, reduces the risk of deformation or damage, and thus makes the production process more efficient and consistent. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the openable and closable lower mold assembly structure in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the secondary lifting component structure in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the overall external structure (after lifting) in the embodiments of this application;

[0027] Reference numerals: 1. Base; 2. Connecting plate; 3. Injection molding machine body; 4. Upper mold; 5. Openable lower mold assembly; 501. Base plate; 502. Lower mold template; 503. Fixing block; 504. Elastic telescopic rod; 505. Rotating shaft; 506. First annular groove; 507. Elastic sealing gasket; 6. Secondary lifting assembly; 601. Hydraulic push rod body; 602. First circular plate; 603. Second circular plate; 604. Sealing ring; 605. Square plate; 606. L-shaped block; 607. Second annular groove. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a mold frame that facilitates demolding.

[0030] Please see Figure 1 A mold frame for easy demolding includes a base 1, a connecting plate 2 fixed on one side of the top of the base 1, an injection molding machine body 3 installed on the upper inner side of the connecting plate 2, an upper mold 4 fixed in the center of the side of the injection molding machine body 3 opposite to the base 1, an openable lower mold assembly 5 provided in the upper inner part of the base 1, and a secondary lifting assembly 6 provided below the openable lower mold assembly 5.

[0031] Please see Figures 2 to 4 The openable lower mold assembly 5 includes a base plate 501, which slides vertically inside the base 1. The side of the base plate 501 is provided with four vertically rotating lower mold templates 502 distributed at equal angles. A fixing block 503 is fixed to the outside of the lower mold template 502. An elastic telescopic rod 504 is installed on the inside of the fixing block 503. The output end of the elastic telescopic rod 504 is hinged to the fixing block 503. A rotating shaft 505 is fixed to the other end of the elastic telescopic rod 504. The two ends of the rotating shaft 505 are rotatably connected to the inside of the top of the base 1.

[0032] The inner side of the base plate 501 is provided with a first annular groove 506, and the second circular plate 603 is sealed and fitted with the base plate 501 through the sealing ring 604 and the first annular groove 506.

[0033] The base plate 501 is in the shape of an isosceles trapezoid, and elastic sealing gaskets 507 are provided on both sides of the base plate 501.

[0034] The secondary lifting assembly 6 includes a hydraulic push rod body 601, which is fixed at the center of the inner bottom wall of the base 1. A first circular plate 602 is fixed to the output end of the hydraulic push rod body 601, and a second circular plate 603 is fixed to the top of the first circular plate 602. Sealing rings 604 are provided on the sides of the first circular plate 602 and the second circular plate 603. A square plate 605 is provided on the outer side of the first circular plate 602, and four L-shaped blocks 606 are fixed on the outer side of the bottom end of the square plate 605 at equal angles.

[0035] A second annular groove 607 is provided on the inner side of the square plate 605, and the surface of the sealing ring 604 on the first circular plate 602 is in sealing contact with the second annular groove 607.

[0036] The base 1 has an opening 101 inside, and the side of the L-shaped block 606 fits against the inside of 101. The L-shaped block 606 and 101 are slidably connected.

[0037] The square plate 605 slides vertically inside the base 1. The sliding distance of the square plate 605 is the same as the sliding distance of the L-shaped block 606. The top of the maximum sliding height of the square plate 605 is on the same horizontal line as the top of the base 1.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mold frame for easy demolding, comprising a base (1), characterized in that: A connecting plate (2) is fixed on one side of the top of the base (1). An injection molding machine body (3) is installed on the upper side of the inner side of the connecting plate (2). An upper mold (4) is fixed in the center of the side of the injection molding machine body (3) opposite to the base (1). An openable lower mold assembly (5) is provided on the upper inside of the base (1). A secondary lifting assembly (6) is provided below the openable lower mold assembly (5). The openable lower mold assembly (5) includes a base plate (501), which slides vertically inside the base (1). The side of the base plate (501) is provided with four vertically rotating lower mold templates (502) distributed at equal angles. A fixing block (503) is fixed on the outside of the lower mold template (502). An elastic telescopic rod (504) is installed on the inside of the fixing block (503). The output end of the elastic telescopic rod (504) is hinged to the fixing block (503). A rotating shaft (505) is fixed on the other end of the elastic telescopic rod (504). The two ends of the rotating shaft (505) are rotatably connected to the inside of the top of the base (1).

2. A mold tool holder facilitating mold release according to claim 1, characterized in that: The secondary lifting assembly (6) includes a hydraulic push rod body (601), which is fixed at the center of the inner bottom wall of the base (1). A first circular plate (602) is fixed at the output end of the hydraulic push rod body (601), and a second circular plate (603) is fixed at the top of the first circular plate (602). Sealing rings (604) are provided on the sides of the first circular plate (602) and the second circular plate (603). A square plate (605) is provided on the outer side of the first circular plate (602), and four L-shaped blocks (606) are fixed on the outer side of the bottom end of the square plate (605).

3. A mold tool holder facilitating mold release according to claim 2, wherein: The bottom plate (501) has a first annular groove (506) on its inner side, and the second circular plate (603) is sealed and fitted with the bottom plate (501) through the sealing ring (604) and the first annular groove (506).

4. A mold tool holder facilitating mold release according to claim 3, wherein: The base plate (501) is in the shape of an isosceles trapezoid, and elastic sealing gaskets (507) are provided on both sides of the base plate (501).

5. A mold tool holder facilitating mold release according to claim 2, wherein: The square plate (605) has a second annular groove (607) on its inner side, and the surface of the sealing ring (604) on the first circular plate (602) is in sealing contact with the second annular groove (607).

6. A mold tool holder facilitating mold release according to claim 2, wherein: The base (1) has an opening (101) inside, the side of the L-shaped block (606) is in contact with the inside of (101), and the L-shaped block (606) is slidably connected to (101).

7. A mold tool holder facilitating mold release according to claim 5, wherein: The square plate (605) slides vertically inside the base (1). The sliding distance of the square plate (605) is the same as the sliding distance of the L-shaped block (606). The top of the maximum sliding height of the square plate (605) is on the same horizontal line as the top of the base (1).

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