A guiding and positioning mechanism for a plastic mold

Abstract

This application relates to the technical field of mold guiding and positioning, and in particular to a guiding and positioning mechanism for plastic molds. The mechanism includes a worktable and a support frame, with the support frame fixedly mounted on the worktable. A mold assembly is disposed between the worktable and the support frame. A lifting plate is disposed above the worktable, and guide rods are slidably disposed at each of the four corners of the worktable. This invention utilizes a pushing assembly composed of a drive rod, a first connecting plate, a second connecting plate, a connecting block, and a drive source. In conjunction with the guide rods slidably disposed at the four corners of the worktable, only the drive rod needs to be controlled to drive the lifting plate to rise and fall stably along the guide rods, thereby quickly adjusting the height of the fixed assembly on the lifting plate. The adjustment process requires no cumbersome disassembly or assembly, and can accurately adapt to the fixed position according to molds of different heights and specifications, reducing the time operators spend adjusting the fixed assembly, shortening the mold change cycle, and improving the production efficiency of plastic products.

Description

Technical Field

[0001] This application relates to the technical field of mold guiding and positioning, and in particular to a guiding and positioning mechanism for a plastic mold. Background Technology

[0002] Plastic molds, as the core equipment for the production and manufacturing of plastic products, are widely used in many fields such as electronics, automobiles, home appliances, and medical devices. Their performance directly determines the dimensional accuracy, appearance quality, production efficiency, and manufacturing cost of plastic products.

[0003] A search revealed that Chinese Patent Publication No. CN220297616U discloses a guiding and positioning mechanism for a plastic mold, comprising a body. The upper surface of the body has four symmetrically arranged sliding grooves. A relative moving mechanism is installed between each pair of opposite sliding grooves. The movable ends of the two relative moving mechanisms are respectively fixedly installed with a first clamping plate and a second clamping plate. The outer surface of the second clamping plate is provided with a guiding mechanism. The plastic mold body is placed between the two first clamping plates and the two second clamping plates.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: existing mold fixing components often employ a fixed height design, or require cumbersome operations such as disassembling bolts and adjusting shims to achieve height adjustment, making it impossible to quickly and accurately adapt the fixing position to molds of different heights; this results in operators spending a significant amount of time adjusting the fixing components when changing molds, extending the mold change cycle and reducing production efficiency. Utility Model Content

[0005] In order to adapt to molds of different heights, shorten the mold change cycle, and improve production efficiency, this application provides a guiding and positioning mechanism for plastic molds.

[0006] This application provides a guiding and positioning mechanism for a plastic mold, which adopts the following technical solution: it includes a worktable and a support frame, the support frame is fixedly installed on the worktable, a mold assembly is provided between the worktable and the support frame, a lifting plate is provided above the worktable, guide rods are slidably provided at the four corners of the worktable, the two ends of the guide rods are fixedly connected to the worktable and the support frame respectively, a pushing assembly is provided below the lifting plate and between it and the worktable, and a fixing assembly is provided above the lifting plate.

[0007] Optionally, the mold assembly includes a lower mold mounted on the worktable. A through hole is provided in the middle of the lifting plate, through which the lower mold passes. An mounting plate is provided above the lower mold, and an upper mold is mounted on the lower end of the mounting plate. A telescopic cylinder is provided between the upper end of the mounting plate and the support frame. Guide plates are mounted on both sides of the mounting plate, and the guide plates are slidably disposed with the support frame.

[0008] Optionally, the pushing assembly includes a drive rod, which is rotatably mounted on the worktable. Both ends of the drive rod are fixedly mounted with a connecting plate one. A connecting plate two is rotatably mounted on the end of the connecting plate one away from the drive rod. A connecting block is rotatably mounted on the connecting plate two. The connecting block is fixedly connected to the lifting plate. The power end of the drive rod is provided with a drive source.

[0009] Optionally, the fixing component includes guide rails, and four guide rails are provided. The four guide rails are located at the four corners of the lifting plate, and all four guide rails are inclined. A slider is slidably installed on each guide rail, and a clamping plate is installed on the slider. A driving component is provided between the two sliders on the same side.

[0010] Optionally, the driving component includes a push rod, the two ends of which are slidably disposed with the lifting plate, and a hydraulic telescopic rod is disposed between the middle part of the push rod and the lifting plate.

[0011] Optionally, the clamping plate is configured as an "L" shape, a rubber pad is installed on the inner side of the clamping plate, and the clamping plate and the slider are fixedly connected by fixing bolts.

[0012] Optionally, a wear-resistant guide sleeve is fixedly installed at the penetration position between the guide rod and the lifting plate. The wear-resistant guide sleeve is made of polytetrafluoroethylene reinforced nylon material.

[0013] Optionally, the hydraulic telescopic rod is fixedly installed on the lifting plate, and the push rod is slidably disposed with respect to the slider.

[0014] In summary, this application includes the following beneficial technical effects: 1. This utility model uses a pushing assembly consisting of a drive rod, a first connecting plate, a second connecting plate, a connecting block, and a drive source, in conjunction with guide rods that slide at the four corners of the worktable. By simply controlling the drive rod, the lifting plate can be driven to rise and fall stably along the guide rods, thereby quickly adjusting the height of the fixed components on the lifting plate. The adjustment process does not require cumbersome disassembly and assembly, and can accurately adapt to the fixed position according to molds of different height specifications, reducing the time for operators to adjust the fixed components, shortening the mold change cycle, and improving the production efficiency of plastic products.

[0015] 2. This utility model uses four inclined guide rails, sliders, and push rods in conjunction with the hydraulic telescopic rod to achieve stable clamping of the mold from the four corners with a clamping plate. The rubber pads on the inner side of the clamping plate can prevent damage to the mold surface during clamping. The PTFE-reinforced nylon wear-resistant guide sleeve at the junction of the guide rod and the lifting plate can reduce wear during the lifting process, ensure the stability of the lifting plate when it drives the fixed components to move, and thus ensure the guiding and positioning accuracy of the mold. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a partial structural diagram of an embodiment of this application; Figure 3 This is a schematic diagram of the lifting plate structure in an embodiment of this application; Figure 4 This is the left view in an embodiment of this application.

[0017] Reference numerals: 1. Workbench; 2. Support frame; 3. Lifting plate; 4. Guide rod; 5. Drive rod; 6. Connecting plate one; 7. Connecting plate two; 8. Connecting block; 9. Drive source; 10. Push rod; 11. Slider; 12. Guide rail; 13. Clamping plate; 14. Hydraulic telescopic rod; 15. Lower mold; 16. Upper mold; 17. Mounting plate; 18. Telescopic cylinder; 19. Guide plate. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0019] This application discloses a guiding and positioning mechanism for a plastic mold. For example... Figure 1 , Figure 2 As shown, the assembly includes a workbench 1 and a support frame 2. The support frame 2 is fixedly installed on the workbench 1, and a PLC controller is installed on the support frame 2. A mold assembly is provided between the workbench 1 and the support frame 2. The mold assembly includes a lower mold 15, which is installed on the workbench 1. A through hole is provided in the middle of the lifting plate 3, through which the lower mold 15 passes. An mounting plate 17 is provided above the lower mold 15, and an upper mold 16 is installed at the lower end of the mounting plate 17. Cylindrical positioning pins are provided at the four corners of the lower mold 15, and positioning holes are provided at corresponding positions on the upper mold 16. The clearance between the positioning pins and the positioning holes is 0.005-0.01mm.

[0020] See Figure 1 , Figure 4 As shown, a telescopic cylinder 18 is provided between the upper end of the mounting plate 17 and the support frame 2. Guide plates 19 are installed on both sides of the mounting plate 17. The guide plates 19 are slidably arranged with the support frame 2. A lifting plate 3 is provided above the worktable 1. Guide rods 4 are slidably arranged at the four corners of the worktable 1. The two ends of the guide rods 4 are fixedly connected to the worktable 1 and the support frame 2 respectively. Wear-resistant guide sleeves are fixedly installed at the penetration position of the guide rods 4 and the lifting plate 3. The wear-resistant guide sleeves are made of polytetrafluoroethylene reinforced nylon material.

[0021] See Figure 1 , Figure 2 , Figure 4As shown. A pushing assembly is provided between the lifting plate 3 and the worktable 1. The pushing assembly includes a drive rod 5, which is rotatably mounted on the worktable 1. Both ends of the drive rod 5 are fixedly mounted with a connecting plate 6. A connecting plate 7 is rotatably mounted on the end of the connecting plate 6 away from the drive rod 5. A connecting block 8 is rotatably mounted on the connecting plate 7. The connecting block 8 is fixedly connected to the lifting plate 3. The power end of the drive rod 5 is provided with a drive source 9, which is a servo motor with a planetary reducer. The drive source 9 is fixed to the worktable 1 by a flange. The output shaft is connected to the drive rod 5 by a coupling.

[0022] See Figure 2 , Figure 3 As shown, a fixing assembly is provided above the lifting plate 3. The fixing assembly includes a guide rail 12. The guide rail 12 adopts a dovetail groove type and there are four guide rails 12. The four guide rails 12 are located at the four corners of the lifting plate 3, and all four guide rails 12 are inclined. A slider 11 is slidably installed on each guide rail 12. The mating surface between the slider 11 and the guide rail 12 is coated with a wear-resistant coating. A clamping plate 13 is installed on the slider 11. The clamping plate 13 is set in an "L" shape, and a rubber pad is installed on the inner side of the clamping plate 13.

[0023] See Figure 2 As shown, the clamping plate 13 and the slider 11 are fixedly connected by fixing bolts. A driving component is provided between the two sliders 11 on the same side. The driving component includes a push rod 10. The two ends of the push rod 10 are slidably disposed with the lifting plate 3. A hydraulic telescopic rod 14 is provided between the middle part of the push rod 10 and the lifting plate 3. The hydraulic telescopic rod 14 is fixedly installed on the lifting plate 3. The push rod 10 and the slider 11 are slidably disposed.

[0024] The implementation principle of the guiding and positioning mechanism for a plastic mold in this application embodiment is as follows: First, according to the actual height specifications of the plastic mold to be processed, the drive source 9 is started. The drive source 9 drives the drive rod 5 to rotate on the worktable 1. The connecting plates 6 at both ends of the drive rod 5 rotate synchronously with the drive rod 5, and then push the connecting block 8 through the rotating connecting plate 7. The connecting block 8 pushes the lifting plate 3 to slide along the guide rod 4 until the lifting plate 3 drives the fixing component to move to a position that is fully adapted to the mold to be fixed, and the drive source 9 stops working. After the lifting plate 3 is positioned at the desired height, the hydraulic telescopic rod 14 is activated. The hydraulic telescopic rod 14 pushes the push rod 10 to slide horizontally along the lifting plate 3. The pushing force of the push rod 10 is converted into the sliding force of the slider 11 along the inclined guide rail 12. The four sliders 11 slide synchronously along the inclined guide rail 12 towards the center of the mold, causing the clamping plate 13 fixed on the slider 11 to approach the four corners of the mold. The hydraulic telescopic rod 14 stops pushing until the inner side of the clamping plate 13 is in contact with the outer wall of the mold. After the mold is fixed, the telescopic cylinder 18 is activated, which pushes the mounting plate 17 down vertically. The guide plates 19 on both sides of the mounting plate 17 slide with the support frame 2 to limit the horizontal displacement of the mounting plate 17. The upper mold 16 descends synchronously with the mounting plate 17 until the upper mold 16 and the lower mold 15 fit precisely together, completing the mold closing. Then, the injection molding equipment can be started to inject plastic raw materials into the mold cavity after the mold is closed for plastic product processing.

[0025] 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 guiding and positioning mechanism for a plastic mold, comprising a worktable (1) and a support frame (2), characterized in that: The support frame (2) is fixedly installed on the workbench (1). A mold assembly is provided between the workbench (1) and the support frame (2). A lifting plate (3) is provided above the workbench (1). Guide rods (4) are slidably provided at the four corners of the workbench (1). The two ends of the guide rods (4) are fixedly connected to the workbench (1) and the support frame (2) respectively. A pushing assembly is provided between the lifting plate (3) and the workbench (1). A fixing assembly is provided above the lifting plate (3).

2. The guiding and positioning mechanism for a plastic mold according to claim 1, characterized in that: The mold assembly includes a lower mold (15), which is mounted on the workbench (1). A through hole is provided in the middle of the lifting plate (3), through which the lower mold (15) passes. An mounting plate (17) is provided above the lower mold (15), and an upper mold (16) is mounted on the lower end of the mounting plate (17). A telescopic cylinder (18) is provided between the upper end of the mounting plate (17) and the support frame (2). Guide plates (19) are installed on both sides of the mounting plate (17), and the guide plates (19) are slidably mounted with the support frame (2).

3. The guiding and positioning mechanism for a plastic mold according to claim 1, characterized in that: The pushing assembly includes a drive rod (5), which is rotatably mounted on the worktable (1). Both ends of the drive rod (5) are fixedly mounted with a connecting plate (6). A connecting plate (7) is rotatably mounted on the end of the connecting plate (6) away from the drive rod (5). A connecting block (8) is rotatably mounted on the connecting plate (7). The connecting block (8) is fixedly connected to the lifting plate (3). A drive source (9) is provided at the power end of the drive rod (5).

4. The guiding and positioning mechanism for a plastic mold according to claim 1, characterized in that: The fixing component includes guide rails (12), and four guide rails (12) are provided. The four guide rails (12) are located at the four corners of the lifting plate (3), and the four guide rails (12) are all inclined. A slider (11) is slidably installed on each guide rail (12). A clamping plate (13) is installed on the slider (11). A driving component is provided between the two sliders (11) on the same side.

5. The guiding and positioning mechanism for a plastic mold according to claim 4, characterized in that: The driving component includes a push rod (10), the two ends of which are slidably disposed with the lifting plate (3), and a hydraulic telescopic rod (14) is disposed between the middle part of the push rod (10) and the lifting plate (3).

6. The guiding and positioning mechanism for a plastic mold according to claim 4, characterized in that: The clamping plate (13) is set in an "L" shape, and a rubber pad is installed on the inner side of the clamping plate (13). The clamping plate (13) and the slider (11) are fixedly connected by fixing bolts.

7. The guiding and positioning mechanism for a plastic mold according to claim 1, characterized in that: A wear-resistant guide sleeve is fixedly installed at the penetration position between the guide rod (4) and the lifting plate (3). The wear-resistant guide sleeve is made of polytetrafluoroethylene reinforced nylon material.

8. The guiding and positioning mechanism for a plastic mold according to claim 5, characterized in that: The hydraulic telescopic rod (14) is fixedly installed on the lifting plate (3), and the push rod (10) is slidably set with the slider (11).

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