Automobile part injection mold with mold cavity convenient to replace

Abstract

The utility model discloses an automobile part injection mold with a mold cavity convenient to replace, which belongs to the technical field of mechanical process and manufacturing, and adopts the technical scheme that the automobile part injection mold comprises a mold frame, an object placing table is fixedly connected to the inner side of the top of the mold frame, and a same-direction positioning mechanism is movably connected to the top of the mold frame; the potential problem of replacement of a mold cavity of a traditional mold can be solved, an arc-shaped guide plate can be made to rotate by starting a servo motor at the bottom of a mold frame, twelve sets of clamping rods can move towards the circle center of a containing table at the same time through linkage transmission of an arc-shaped groove, a linkage column and a sliding block, and therefore the mold cavity can be replaced conveniently. Multi-point-position clamping of the die is completed at a time, the trouble of manual point-by-point adjustment is avoided, the replacement efficiency is greatly improved, the clamping rods do not directly abut against the die in a hard mode and are attached through the outwards-protruding friction wheel at the top end of the die, when large deviation force is encountered, the large deviation force can be converted into rotation of the friction wheel for counteracting, and hard damage to the die is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering and manufacturing technology, and in particular to an injection mold for automotive parts that facilitates mold cavity replacement. Background Technology

[0002] Molds are various molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, molds are tools used to make shaped objects. These tools are composed of various parts, and different molds are composed of different parts. They mainly achieve the processing of the shape of objects by changing the physical state of the material being molded, and are often referred to as the "mother of industry".

[0003] In the existing technology, when replacing the mold cavity, it is necessary to position it on the mold frame by a rigid fastener. However, the traditional method relies on manual adjustment of the clamping device point by point, which has poor synchronization and takes a long time. In addition, the fastener directly adheres to the mold surface or is positioned by rigid contact. If the force is uneven during the replacement process, scratches and deformation are likely to occur.

[0004] Therefore, a new type of injection mold for automotive parts is proposed, which facilitates the replacement of mold cavities. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold for automotive parts that is easy to replace, which can solve the problems of low clamping efficiency or poor stability caused by asynchronous multi-point positioning and mold surface damage caused by traditional rigid clamping.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for automotive parts that facilitates mold cavity replacement, comprising a mold frame, a platform fixedly connected to the inner side of the top of the mold frame, a unidirectional positioning mechanism movably connected to the top of the mold frame, and an elastic buffer mechanism movably connected to the inner side of the unidirectional positioning mechanism.

[0007] The same-direction positioning mechanism includes a sliding block slidably connected to the top of the mold frame, a clamping rod fixedly connected to the top of the sliding block, an elastic buffer mechanism movably connected to the outside of the clamping rod, a friction wheel rotatably connected to the outside of the top of the clamping rod, and a same-direction driving assembly movably connected to the bottom of the sliding block, the same-direction driving assembly being located at the bottom of the mold frame.

[0008] Preferably, the elastic buffer mechanism includes a hollow block fixedly connected to the outside of the clamping rod, and a contact block is slidably connected to the outside of the hollow block.

[0009] Preferably, a sliding guide rail is slidably connected to the inner side of the hollow block, and force-shaping blocks are slidably connected to the top and bottom of the inner side of the sliding guide rail. A telescopic pull rod is fixedly connected to the corresponding side of the force-shaping block, and a telescopic push rod is rotatably connected to the corresponding side of the force-shaping block and the hollow block.

[0010] Preferably, a tension spring is fixedly connected to the outer side of the telescopic rod, and a compression spring is fixedly connected to the outer side of the telescopic push rod.

[0011] Preferably, the co-directional drive assembly includes a support base plate disposed at the bottom of the mold frame, a servo motor is fixedly connected to the top of the support base plate, and an arc-shaped guide plate is fixedly connected to the output end of the servo motor.

[0012] Preferably, the inner side of the arc-shaped guide plate is provided with an arc-shaped groove, and a linkage column is movably connected to the inner side of the arc-shaped groove. A sliding block is fixedly connected to the linkage column.

[0013] Preferably, an anti-slip pad is fixedly connected to the top of the shelf.

[0014] Preferably, an elastic gasket is fixedly connected to the outer side of the contact block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This application solves the potential problems of traditional mold cavity replacement by setting up a unidirectional positioning mechanism. By starting the servo motor at the bottom of the mold frame, the arc guide plate can be rotated. Then, through the linkage transmission of the arc groove, linkage column and sliding block, the twelve sets of clamping rods can move towards the center of the platform at the same time, completing the multi-point clamping of the mold in one go. This avoids the trouble of manual point-by-point adjustment and greatly improves the replacement efficiency. Moreover, the clamping rods do not directly push the mold, but rely on the friction wheel protruding from the top of the mold to make contact. When encountering a large offset force, it can be converted into the rotation of the friction wheel to offset it, reducing the hard damage to the mold. This ensures the smoothness of the replacement process and extends the service life of the mold, making the mold replacement process fast and safe.

[0017] 2. By setting up an elastic buffer mechanism, this application can reduce the impact force of direct hard contact when contacting the mold. When the contact block slides inward to the hollow block, the telescopic push rod and force distribution block inside will drive the compression spring and tension spring to generate elastic force. Similar to a buffer, it can disperse uneven pressure. For example, when a certain position is subjected to great force, the compression spring and tension spring will offset part of the stress through extension and rebound, avoiding scratches or deformation of the mold by hard pressing in some areas. The fixing process changes from hard clamping to elastic buffering. By relying on the linkage of elastic pads and springs, the force that may damage the mold is converted into elastic potential energy, and the pressure is evenly distributed. It not only clamps the mold, but also effectively protects the mold surface from damage. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the automotive parts injection mold of this utility model, which facilitates mold cavity replacement;

[0019] Figure 2 This is a partial structural diagram of the mold frame of this utility model;

[0020] Figure 3 This is an overall structural diagram of the same-direction positioning mechanism of this utility model;

[0021] Figure 4 This is an overall structural diagram of the co-directional drive assembly of this utility model;

[0022] Figure 5 This is an overall structural diagram of the elastic buffer mechanism of this utility model.

[0023] In the diagram, 1. Mold frame; 2. Display platform; 3. Co-directional positioning mechanism; 31. Sliding block; 32. Clamping rod; 33. Friction wheel; 34. Co-directional drive assembly; 34a. Support base plate; 34b. Servo motor; 34c. Arc-shaped guide plate; 34d. Arc-shaped groove; 34e. Linkage column; 4. Elastic buffer mechanism; 41. Hollow block; 42. Contact block; 43. Sliding guide rail; 44. Force distribution block; 45. Telescopic pull rod; 46. Telescopic push rod; 47. Tension spring; 48. Compression spring; 5. Anti-slip pad; 6. Elastic gasket. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-5 The present invention provides the following technical solution:

[0026] An injection mold for automotive parts with easy mold cavity replacement includes a mold base 1, a platform 2 fixedly connected to the inner side of the top of the mold base 1, a unidirectional positioning mechanism 3 movably connected to the top of the mold base 1, and an elastic buffer mechanism 4 movably connected to the inner side of the unidirectional positioning mechanism 3.

[0027] The unidirectional positioning mechanism 3 includes a sliding block 31 slidably connected to the top of the mold frame 1, a clamping rod 32 fixedly connected to the top of the sliding block 31, an elastic buffer mechanism 4 movably connected to the outside of the clamping rod 32, a friction wheel 33 rotatably connected to the outside of the top of the clamping rod 32, and a unidirectional driving assembly 34 movably connected to the bottom of the sliding block 31. The unidirectional driving assembly 34 is located at the bottom of the mold frame 1.

[0028] In this embodiment: Before replacing the mold cavity of the automotive part injection mold, the mold to be replaced needs to be taken out of the injection molding machine and placed on the mold frame 1 for manual removal and replacement. In order to make the replacement process go smoothly and avoid damage to the injection mold, after the mold is placed on the platform 2 in the center of the mold frame 1, the same-direction drive assembly 34 is activated, which allows the twelve sets of clamping rods 32 supported by the sliding block 31 at the top of the mold frame 1 to move simultaneously towards the center of the platform 2, clamping the mold at the top of the platform 2 from multiple directions. When the clamping rods 32 clamp the mold, they do not directly stick to the mold surface, but rather they are engaged through the friction wheel 33 protruding from the top of the mold. In this way, if a large offset force is generated when replacing the mold cavity, it will be converted into the rotation of multiple friction wheels 33 to offset it, thereby reducing hard damage to the mold.

[0029] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, the elastic buffer mechanism 4 includes a hollow block 41 fixedly connected to the outside of the clamping rod 32, and a contact block 42 is slidably connected to the outside of the hollow block 41.

[0030] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, a sliding guide rail 43 is slidably connected to the inner side of the hollow block 41. A force-sharing block 44 is slidably connected to the top and bottom of the inner side of the sliding guide rail 43. A telescopic pull rod 45 is fixedly connected to the corresponding side of the force-sharing block 44. A telescopic push rod 46 is rotatably connected to the corresponding side of the force-sharing block 44 and the hollow block 41.

[0031] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, a tension spring 47 is fixedly connected to the outer side of the telescopic rod 45, and a compression spring 48 is fixedly connected to the outer side of the telescopic push rod 46.

[0032] In this embodiment: The clamping rod 32 has a nested buffer structure on its outer side, consisting of a hollow block 41 and a contact block 42. This structure first contacts the mold to be positioned. When the contact block 42 touches the mold from multiple directions, the elastic pad 6 on the surface of the contact block 42 will adhere tightly to the mold surface and deform slightly, thus reducing the stress during contact. At this time, the arc-shaped guide plate 34c will continue to drive the contact block 42 to slide inward towards the hollow block 41. During the sliding process, because the distance between the contact block 42 and the hollow block 41 decreases, the contact block 42 and the hollow block 41... The telescopic push rod 46 between the component blocks 44 inside the sliding guide rail 43 on the inner side of the empty block 41 will be compressed downward and rotated. This will cause the component blocks 44 on both sides to slide along the sliding guide rail 43 to both ends when the contact block 42 is pressed down, thereby stretching the telescopic pull rod 45 between the two component blocks 44. Since there is a compression spring 48 on the outside of the telescopic push rod 46 and a tension spring 47 on the outside of the telescopic pull rod 45, in the above series of actions, the compression spring 48 and the tension spring 47 will store elastic potential energy respectively, and then generate a reverse thrust to counteract the stress generated when clamping.

[0033] Specifically, such as Figure 3 , Figure 4 As shown, the co-directional drive assembly 34 includes a support base plate 34a disposed at the bottom of the mold frame 1, a servo motor 34b fixedly connected to the top of the support base plate 34a, and an arc-shaped guide plate 34c fixedly connected to the output end of the servo motor 34b.

[0034] Specifically, such as Figure 3 , Figure 4 As shown, an arc-shaped groove 34d is provided on the inner side of the arc-shaped guide plate 34c, and a linkage column 34e is movably connected to the inner side of the arc-shaped groove 34d. A sliding block 31 is fixedly connected to the linkage column 34e.

[0035] In this embodiment: by opening the servo motor 34b at the bottom of the mold frame 1 and the top of the supporting base plate 34a, the output end of the servo motor 34b is connected to the arc-shaped guide plate 34c that fits the bottom of the mold frame 1. When the arc-shaped guide plate 34c rotates, the arc-shaped groove 34d inside it will rotate and change position. The linkage column 34e inside the arc-shaped groove 34d will move along the trajectory of the arc-shaped groove 34d. When the linkage column 34e moves, it will pull the sliding block 31 connected at the top to slide inside the mold frame 1. The sliding block 31 will also move the clamping rod 32 supported at the top of it in the same direction. In this way, by driving the arc-shaped guide plate 34c to rotate through the servo motor 34b, the twelve sets of clamping rods 32 supported by the sliding block 31 at the top of the mold frame 1 will move simultaneously toward the center of the platform 2, clamping the mold at the top of the platform 2 from multiple directions.

[0036] Specifically, such as Figure 1 As shown, an anti-slip pad 5 is fixedly connected to the top of the shelf 2.

[0037] Specifically, such as Figure 1 As shown, an elastic gasket 6 is fixedly connected to the outer side of the contact block 42.

[0038] In this embodiment: the anti-slip pad 5 can increase the friction wheel 33 on the top of the mold placed on the platform 2, and the elastic pad 6 can conform to the mold surface and reduce stress.

[0039] Working Principle: Before replacing the mold cavity of an automotive part injection mold, the mold to be replaced needs to be removed from the injection molding machine and placed on the mold frame 1 for manual removal and replacement. To ensure a smooth replacement process and prevent damage to the injection mold, after placing the mold on the platform 2 at the center of the mold frame 1, the servo motor 34b located at the top of the support base plate 34a at the bottom of the mold frame 1 is started. The output end of the servo motor 34b is fixedly connected to an arc-shaped guide plate 34c that fits against the bottom of the mold frame 1. When the arc-shaped guide plate 34c rotates, the position of its internal arc-shaped groove 34d will follow its rotation and shift, and the linkage column 34e on the inner side of the arc-shaped groove 34d will guide along the displacement of the arc-shaped groove 34d. During the process of the moving column 34e being guided through the arc-shaped groove 34d, the sliding block 31 connected to its top is pulled by the linkage column 34e to slide inside the mold frame 1, and is linked in the same direction with the clamping rod 32 supported on its top. Thus, through the effect of the servo motor 34b driving the arc-shaped guide plate 34c, the twelve sets of clamping rods 32 located on the top of the mold frame 1 and supported by the sliding block 31 can move simultaneously towards the center of the platform 2, and clamp the mold on the top of the platform 2 at multiple points in the same direction. After clamping, the clamping rods 32 do not directly contact the mold surface, but instead contact it through the protruding friction wheel 33 on the top of the mold. This allows the large offset force generated when changing the mold cavity to be converted into multiple friction wheels. The rotation of the friction wheel 33 is offset, reducing hard damage. Before the friction wheel 33 contacts the tool in the above manner, the nested buffer structure consisting of the hollow block 41 and the contact block 42 located outside the clamping rod 32 will preferentially contact and position the mold being positioned. After the contact block 42 contacts the mold from multiple directions, the arc-shaped guide plate 34c is in a continuous linkage state. The surface of the contact block 42 is provided with an elastic pad 6 that conforms to the mold surface and deforms to reduce stress. Under the continued linkage of the arc-shaped guide plate 34c, the contact block 42 slides towards the inside of the hollow block 41. During the sliding process, due to the reduction of the distance between the contact block 42 and the hollow block 41, the contact block 42 and the sliding guide plate located inside the hollow block 41 slide towards the inside of the mold. The telescopic push rod 46 between the force-shaping blocks 44 inside the rail 43 will press down, retract, and rotate accordingly, causing the force-shaping blocks 44 on both sides to slide towards both ends along the sliding guide rail 43 during the pressing of the contact block 42, and stretching the telescopic pull rod 45 between the two force-shaping blocks 44. On the outside of the telescopic push rod 46 and the telescopic pull rod 45, a compression spring 48 and a tension spring 47 are respectively provided. Under the above-mentioned buffer linkage, the compression spring 48 and the tension spring 47 generate elastic potential energy and drive them to generate a push force, thereby offsetting the clamping stress. In summary, by buffering the pre-contact before the friction wheel 33 contacts the mold, the clamping is buffered and effective, avoiding damage to the mold caused by multi-point positioning, and ensuring the stability and efficiency of mold cavity replacement.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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. An injection mold for automotive parts with easily replaceable mold cavities, comprising a mold base (1), characterized in that: A shelf (2) is fixedly connected to the inner side of the top of the mold frame (1), and a unidirectional positioning mechanism (3) is movably connected to the top of the mold frame (1). An elastic buffer mechanism (4) is movably connected to the inner side of the unidirectional positioning mechanism (3). The same-direction positioning mechanism (3) includes a sliding block (31) slidably connected to the top of the mold frame (1), a clamping rod (32) fixedly connected to the top of the sliding block (31), an elastic buffer mechanism (4) movably connected to the outside of the clamping rod (32), a friction wheel (33) rotatably connected to the outside of the top of the clamping rod (32), and a same-direction driving assembly (34) movably connected to the bottom of the sliding block (31). The same-direction driving assembly (34) is located at the bottom of the mold frame (1).

2. The automotive part injection mold with easily replaceable mold cavity as described in claim 1, characterized in that: The elastic buffer mechanism (4) includes a hollow block (41) fixedly connected to the outside of the clamping rod (32), and a contact block (42) is slidably connected to the outside of the hollow block (41).

3. The automotive part injection mold with easily replaceable mold cavity as described in claim 2, characterized in that: The inner side of the hollow block (41) is slidably connected to a sliding guide rail (43), and the top and bottom of the inner side of the sliding guide rail (43) are slidably connected to force-sharing blocks (44). A telescopic pull rod (45) is fixedly connected to one side of the force-sharing block (44), and a telescopic push rod (46) is rotatably connected to one side of the force-sharing block (44) and the hollow block (41).

4. The automotive part injection mold with easily replaceable mold cavity as described in claim 3, characterized in that: A tension spring (47) is fixedly connected to the outer side of the telescopic rod (45), and a compression spring (48) is fixedly connected to the outer side of the telescopic push rod (46).

5. The automotive part injection mold with easily replaceable mold cavity according to claim 1, characterized in that: The co-directional drive assembly (34) includes a support base plate (34a) disposed at the bottom of the mold frame (1), a servo motor (34b) is fixedly connected to the top of the support base plate (34a), and an arc-shaped guide plate (34c) is fixedly connected to the output end of the servo motor (34b).

6. The automotive part injection mold with easily replaceable mold cavity as described in claim 5, characterized in that: The inner side of the arc-shaped guide plate (34c) is provided with an arc-shaped groove (34d), and the inner side of the arc-shaped groove (34d) is movably connected with a linkage column (34e), and the linkage column (34e) is fixedly connected with a sliding block (31).

7. The automotive part injection mold with easily replaceable mold cavity according to claim 1, characterized in that: The top of the shelf (2) is fixedly connected to an anti-slip pad (5).

8. The automotive part injection mold with easily replaceable mold cavity according to claim 2, characterized in that: An elastic gasket (6) is fixedly connected to the outside of the contact block (42).

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