Spherical joint mechanism for injection mold

Abstract

The invention discloses a spherical joint mechanism for an injection mold, and particularly relates to the technical field of mold connection, the spherical joint mechanism comprises an upper mold block and a lower mold block, an upper positioning block is mounted in the upper mold block, a first screw is connected between the upper positioning block and the upper mold block, a positioning groove is formed in the upper mold block, a lower attaching block is mounted in the lower mold block, and a second screw is connected between the upper positioning block and the lower mold block. A second screw is connected between the lower attaching block and the lower module, a connecting assembly matched with the positioning groove in an inserted mode is installed in the lower attaching block, the bottom of the upper positioning block is flush with the bottom face of the upper module to form a first attaching face, and the top of the lower attaching block is flush with the top face of the lower module to form a second attaching face. The roughness of the first binding face and the roughness of the second binding face range from Ra0.8 micrometers to Ra3.0 micrometers. According to the mold, mold closing is convenient, fixing performance is good, sealing performance is high, dismounting is convenient, meanwhile, through size matching of all parts and arrangement of the magnet blocks, the reliability of overall connection is improved, and the production efficiency and the product quality can be improved easily.

Description

Technical Field

[0001] The present invention relates to the technical field of mold connection, and more specifically, the present invention relates to a spherical joint mechanism for an injection mold. Background Art

[0002] In the field of mold technology, soft rubber models are widely used in multiple industries such as toys, handicrafts, and medical supplies. With the booming development of these industries, the market has increasingly strict requirements for the production efficiency, precision, and quality of soft rubber models, which poses great challenges to the design and manufacturing of molds for soft rubber models.

[0003] Traditional molds for soft rubber models have many drawbacks in actual production. In terms of the mold connection structure, the common bolt connection method is cumbersome to operate. During frequent disassembly and installation, the bolts are extremely prone to wear, which in turn leads to loose connections and affects the positioning accuracy of the mold. This results in relatively large dimensional deviations in the produced soft rubber models, making it difficult to meet the high-precision production requirements. While the snap-fit method is relatively simple to install, it is difficult to accurately control the snap-fit force. When the snap-fit is too loose, the upper and lower molds are prone to separation during production, affecting the continuity of production; when the snap-fit is too tight, it will increase the disassembly difficulty and may even damage the mold during disassembly.

[0004] In addition, during the long-term use of the components of traditional molds, they are affected by factors such as pressure and vibration during the production process, and are prone to looseness and displacement. During the mold closing process, once the relative positions of the upper and lower molds shift, it will not only reduce the forming accuracy of the soft rubber model, but also exacerbate the wear of the mold, shorten the service life of the mold, and thus increase the production cost.

[0005] Therefore, a mold for a soft rubber model is proposed. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a spherical joint mechanism for an injection mold to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A spherical joint mechanism for an injection mold, including an upper module and a lower module. An upper positioning block is installed in the upper module, a first screw is connected between the upper positioning block and the upper module, a positioning groove is opened in the upper module, a lower fitting block is installed in the lower module, a second screw is connected between the lower fitting block and the lower module, and a connection component inserted and matched with the positioning groove is installed in the lower fitting block;

[0008] The bottom surface of the upper positioning block is flush with the bottom surface of the upper module to form a first fitting surface, the top surface of the lower fitting block is flush with the top surface of the lower module to form a second fitting surface, and the roughness of the first fitting surface and the second fitting surface is Ra0.8μm - Ra3.0μm.

[0009] The upper module and the lower module are respectively part of an injection mold, and the injection mold includes a soft rubber mold. When the mold is closed, the connecting component is inserted into the positioning groove. The positioning groove guides the connecting component to keep it vertically entering. As the connecting component goes deeper, it is interference-fixed in the positioning groove. When the connecting component is fixed in the positioning groove, a centering tension is generated between the upper module and the lower module, making the bottom surface of the upper positioning block flush with the bottom surface of the upper module to form a first fitting surface, which fits with the top surface of the lower fitting block flush with the top surface of the lower module to form a second fitting surface. Since the roughness of the first fitting surface and the second fitting surface is between Ra0.8μm and Ra3.0μm, and due to the pressure generated between the first fitting surface and the second fitting surface, a suction effect is generated. While achieving the sealing between the upper module and the lower module, the connection force between the upper module and the lower module can be enhanced, thus meeting the requirements of fixing and sealing the soft rubber mold, improving the convenience, fixity, and sealing performance of mold closing between the molds, greatly improving the usability, being beneficial to improving production efficiency, avoiding liquid leakage. And after processing and forming, directly pulling out the connecting component from the positioning groove with force can complete the disassembly, which is convenient for disassembly and improves the practicality of use.

[0010] Preferably, the upper module is provided with a first fitting groove for installing the upper positioning block, and the groove depth dimension of the first fitting groove is the same as the thickness dimension of the upper positioning block.

[0011] Preferably, the lower module is provided with a second fitting groove, and the lower fitting block is installed in the second fitting groove, and a washer sleeved on the second screw is arranged at the bottom of the lower fitting block.

[0012] Preferably, the connecting component includes a stud and a ball joint, and the stud passes through the lower fitting block to be connected with the ball joint.

[0013] Preferably, the ball joint protrudes from the top surface of the lower fitting block, and the cross-sectional radian of the protruding ball joint is greater than 300°.

[0014] Preferably, the thickness of the stud head at the bottom of the stud is the same as the thickness of the washer, and the sum of the thickness dimension of the lower fitting block and the thickness dimension of the washer is the same as the groove depth dimension of the second fitting groove.

[0015] Preferably, the positioning groove includes a receiving portion, a clamping portion, and a guiding portion. The clamping portion is arranged outside the receiving portion, and the guiding portion is arranged outside the clamping portion.

[0016] Preferably, a magnet block is installed in the receiving portion.

[0017] The technical effects and advantages of the present invention:

[0018] 1. The connecting component is inserted and fitted with the positioning groove. The positioning groove guides the connecting component to vertically enter and be press-fitted and fixed, generating a centering pulling force to promote the fitting of the first and second fitting surfaces. The roughness of the fitting surfaces is in the range of Ra0.8μm - Ra3.0μm. Under pressure, a suction effect is generated, enhancing the connection force between the upper and lower modules, meeting the fixing requirements of the soft rubber mold, improving the convenience and firmness of mold closing. Through the suction effect, the upper and lower modules are sealed to avoid liquid leakage, meeting the sealing requirements of the soft rubber mold and improving the production quality. After processing and forming, the connecting component can be directly pulled out to complete the disassembly, which is convenient to operate and improves the practicality of use.

[0019] 2. By making the depth of the upper positioning block match the first fitting groove, it is ensured that the bottom of the upper positioning block is flush with the bottom surface of the upper module; the lower fitting block, washer and the second fitting groove are dimensionally matched so that the top surface of the lower fitting block is flush with the top surface of the lower module, ensuring that the first and second fitting surfaces are parallel, which is conducive to generating a suction effect and enhancing the firmness of the module connection.

[0020] 3. The arc of the protruding cross-section of the ball joint is greater than 300°. When inserted into the positioning groove, it can slide and guide along the inner wall and be press-fitted and fixed; the guiding part, clamping part and receiving part of the positioning groove work together to guide, clamp and receive the ball joint, enhancing the connection stability. Moreover, the magnet block in the receiving part attracts the ball joint, making it enter the positioning groove more smoothly and firmly, reducing the influence of vibration or collision, and further improving the connection firmness and sealing performance. Description of the Drawings

[0021] Figure 1 It is a schematic cross-sectional view of the connection between the spherical joint mechanism of the present invention and the mold.

[0022] Figure 2 It is a schematic view of the overall structure of the present invention.

[0023] Figure 3 It is a schematic view of the connection structure between the lower fitting block and the connecting component of the present invention.

[0024] Figure 4 It is a schematic view of the structure of the connecting component of the present invention.

[0025] Figure 5 It is a schematic view of the structure of the upper positioning block of the present invention.

[0026] Reference numerals are: 1. Upper module; 2. Lower module; 3. Upper positioning block; 4. First screw; 5. Lower fitting block; 6. Second screw; 7. Connecting component; 701. Stud; 702. Ball joint; 8. Positioning groove; 801. Receiving part; 802. Clamping part; 803. Guiding part; 9. Washer. Detailed Embodiments

[0027] 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 present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] As shown in the attached Figures 1 - 5 A spherical joint mechanism for an injection mold, including an upper module 1 and a lower module 2. An upper positioning block 3 is installed in the upper module 1. A first screw 4 is connected between the upper positioning block 3 and the upper module 1. A positioning groove 8 is formed in the upper module 1. A lower fitting block 5 is installed in the lower module 2. A second screw 6 is connected between the lower fitting block 5 and the lower module 2. A connection component 7 inserted and matched with the positioning groove 8 is installed in the lower fitting block 5;

[0029] The bottom of the upper positioning block 3 is flush with the bottom surface of the upper module 1 to form a first fitting surface, and the top of the lower fitting block 5 is flush with the top surface of the lower module 2 to form a second fitting surface. The roughness of the first fitting surface and the second fitting surface is Ra0.8μm - Ra3.0μm.

[0030] During specific implementation, the upper module 1 and the lower module 2 are respectively part of an injection mold, and the injection mold includes a soft rubber mold. When the mold is closed, the connection component 7 is inserted into the positioning groove 8. The positioning groove 8 guides the connection component 7 to keep it vertically entering. As the connection component 7 goes deeper, it is interference-fixed in the positioning groove 8. When the connection component 7 is fixed in the positioning groove 8, a centering pulling force will be generated between the upper module 1 and the lower module 2, making the bottom of the upper positioning block 3 flush with the bottom surface of the upper module 1 to form a first fitting surface, which fits with the top of the lower fitting block 5 flush with the top surface of the lower module 2 to form a second fitting surface. Since the roughness of the first fitting surface and the second fitting surface is between Ra0.8μm - Ra3.0μm, and due to the pressure generated between the first fitting surface and the second fitting surface, a suction effect is generated, realizing the sealing between the upper module 1 and the lower module 2, and at the same time, the connection force between the upper module 1 and the lower module 2 can be enhanced, thus meeting the fixing and sealing requirements of the soft rubber mold, improving the convenience, fixity, and sealing performance of the mold closing between the molds, greatly improving the usability, being beneficial to improving production efficiency, avoiding liquid leakage, and after processing and forming, directly pulling out the connection component 7 from the positioning groove 8 with force can complete the disassembly, which is convenient for disassembly and improves the practicality of use.

[0031] The upper module 1 is provided with a first fitting groove for installing the upper positioning block 3, and the depth dimension of the first fitting groove is the same as the thickness dimension of the upper positioning block 3.

[0032] During specific implementation, since the depth dimensions of the upper positioning block 3 and the first mating groove are the same, after the upper positioning block 3 is installed in the first mating groove, it can ensure that the bottom surface of the upper positioning block 3 is flush with the bottom surface of the upper module 1, avoiding the generation of protrusions or grooves, thereby ensuring that the upper module 1 and the lower module 2 can fit together during mold closing, improving the sealing performance.

[0033] The lower module 2 is provided with a second mating groove, the lower fitting block 5 is installed in the second mating groove, and a washer 9 sleeved on the second screw 6 is arranged at the bottom of the lower fitting block 5.

[0034] The connecting component 7 includes a stud 701 and a ball joint 702, and the stud 701 passes through the lower fitting block 5 and is connected to the ball joint 702.

[0035] During specific implementation, by fixing the ball joint 702 with the stud 701, it is convenient to install the ball joint 702, and when the ball joint 702 is worn after long-term use, it is convenient to replace.

[0036] The ball joint 702 protrudes from the top surface of the lower fitting block 5, and the cross-sectional radian of the protruding ball joint 702 is greater than 300°.

[0037] During specific implementation, since the cross-sectional radian of the protruding ball joint 702 is greater than 300°, when the ball joint 702 is inserted into the positioning groove 8, the ball joint 702 can slide with the inner wall of the positioning groove 8, thereby playing a guiding role and being fixed by interference fit.

[0038] The thickness of the stud head at the bottom of the stud 701 is the same as the thickness of the washer 9, and the sum of the thickness dimensions of the lower fitting block 5 and the washer 9 is the same as the groove depth dimension of the second mating groove.

[0039] During specific implementation, since the thickness of the washer 9 is the same as the thickness of the stud head at the bottom of the stud 701, when the lower fitting block 5 is installed, it can maintain a stable state, and the top surface of the lower fitting block 5 is flush with the top surface of the lower module 2, thereby forming a horizontal second fitting surface, so that the first fitting surface and the second fitting surface can be kept parallel. Under the treatment of the surface roughness of the first fitting surface and the second fitting surface, when the first fitting surface and the second fitting surface are fitted and under pressure, the air between the two fitting surfaces can be greatly evacuated, thereby generating a suction effect, further improving the firmness of the connection between the upper module 1 and the lower module 2.

[0040] The positioning groove 8 includes a receiving portion 801, a clamping portion 802 and a guiding portion 803. The clamping portion 802 is arranged on the outside of the receiving portion 801, and the guiding portion 803 is arranged on the outside of the clamping portion 802.

[0041] During specific implementation, when the ball joint 702 enters the positioning groove 8, the guiding portion 803 guides the ball joint 702 to maintain vertical entry. When entering the clamping portion 802, the ball joint 702 is clamped in the clamping portion 802, and the protruding part at the front end is received in the receiving portion 801. Moreover, when the ball joint 702 is clamped in the clamping portion 802, a pulling force is exerted on the stud 701, so that the lower fitting block 5 fits against the upper positioning block 3, causing an extrusion force between the first fitting surface and the second fitting surface, thereby exhausting air and enabling sealing and connection fixation between the first fitting surface and the second fitting surface.

[0042] A magnet block is installed in the receiving portion 801.

[0043] During specific implementation, the magnet block attracts the ball joint 702, making it smoother and easier for the ball joint 702 to enter the positioning groove 8. Moreover, the suction force increases after entry, further improving the firmness of the ball joint 702 in the positioning groove 8, so that the first fitting surface and the second fitting surface can always generate an extrusion force, thereby further improving the firmness and sealing performance of the connection and avoiding the influence caused by vibration or collision.

[0044] Finally, several points should be noted: First, in the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change;

[0045] Second: In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0046] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spherical joint mechanism for an injection mold, comprising an upper module (1) and a lower module (2), characterized in that: An upper positioning block (3) is installed inside the upper module (1). A first screw (4) is connected between the upper positioning block (3) and the upper module (1). A positioning groove (8) is formed inside the upper module (1). A lower fitting block (5) is installed inside the lower module (2). A second screw (6) is connected between the lower fitting block (5) and the lower module (2). A connection component (7) which is inserted and matched with the positioning groove (8) is installed inside the lower fitting block (5). The bottom of the upper positioning block (3) is flush with the bottom surface of the upper module (1) to form a first fitting surface. The top of the lower fitting block (5) is flush with the top surface of the lower module (2) to form a second fitting surface. The roughness of the first fitting surface and the second fitting surface is Ra0.8μm - Ra3.0μm.

2. The spherical joint mechanism for an injection mold according to claim 1, characterized in that: The upper module (1) is provided with a first fitting groove for installing the upper positioning block (3), and the groove depth dimension of the first fitting groove is the same as the thickness dimension of the upper positioning block (3).

3. The spherical joint mechanism for an injection mold according to claim 2, characterized in that: The lower module (2) is provided with a second fitting groove. The lower fitting block (5) is installed in the second fitting groove, and a washer (9) sleeved on the second screw (6) is arranged at the bottom of the lower fitting block (5).

4. The spherical joint mechanism for an injection mold according to claim 3, characterized in that: The connection component (7) includes a stud (701) and a ball joint (702). The stud (701) passes through the lower fitting block (5) and is connected to the ball joint (702).

5. The spherical joint mechanism for an injection mold according to claim 4, characterized in that: The ball joint (702) protrudes from the top surface of the lower fitting block (5), and the cross-sectional radian of the protruding ball joint (702) is greater than 300°.

6. The spherical joint mechanism for an injection mold according to claim 5, characterized in that: The thickness of the stud head at the bottom of the stud (701) is the same as the thickness of the washer (9), and the sum of the thickness dimension of the lower fitting block (5) and the thickness dimension of the washer (9) is the same as the groove depth dimension of the second fitting groove.

7. The spherical joint mechanism for an injection mold according to claim 6, characterized in that: The positioning groove (8) includes a receiving portion (801), a clamping portion (802) and a guiding portion (803). The clamping portion (802) is arranged outside the receiving portion (801), and the guiding portion (803) is arranged outside the clamping portion (802).

8. A spherical joint mechanism for an injection mold according to claim 7, characterized in that: A magnet block is installed inside the receiving portion (801).

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