Die with ejector pin convenient to replace

Abstract

The utility model relates to a mould convenient for replacing an ejector pin, which comprises an upper mould and a lower mould, a side plate, a bottom plate, an upper plate and a lower plate are arranged below the lower mould, the side plate is fixedly connected with the bottom surface of the lower mould, the bottom plate is connected with the bottom surface of the side plate, and the upper plate and the lower plate synchronously ascend and descend; a limiting boss is coaxially arranged at the bottom end of the ejector pin, the outer diameter of the limiting boss is larger than that of the ejector pin, a penetrating hole matched with the ejector pin is formed in the top face of the upper plate, a limiting hole matched with the limiting boss is formed in the bottom face of the upper plate, the penetrating hole is communicated with the limiting hole, and the ejector pin penetrates through the limiting hole and the penetrating hole from bottom to top. The bottom face of the limiting boss is flush with the bottom face of the upper plate, the top face of the lower plate abuts against the bottom face of the limiting boss, a mounting hole communicated with the limiting hole is formed in the lower plate, the diameter of the mounting hole is larger than that of the limiting hole, a grub screw is connected into the mounting hole in a threaded mode, and a taking hole communicated with the mounting hole is formed in the bottom plate. The diameter of the taking hole is larger than that of the mounting hole. The effect of improving the replacement convenience of the ejector pin is achieved.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a mold that facilitates the replacement of ejector pins. Background Technology

[0002] After the product in the injection mold has cooled down, it needs to be ejected from the mold by an ejector pin. However, the ejector pin is relatively thin. When the ejector pin is subjected to a large injection pressure, it is easy for it to get stuck in the ejector pin groove and bend, affecting the normal use of the mold. In this case, the ejector pin needs to be replaced.

[0003] In related technologies, refer to Figure 1 The mold includes an upper mold and a lower mold. The lower mold has an ejector pin groove through which ejector pins pass and slide. An injection groove is provided on the top surface of the lower mold, and the ejector pin groove communicates with the injection groove. The top surface of the ejector pin abuts against the bottom surface of the product. Below the lower mold are side plates, a bottom plate, an upper plate, and a lower plate. The side plates are fixedly connected to the bottom surface of the lower mold. The bottom plate is connected to the side plates and the lower mold by fixing bolts. The upper and lower plates rise and fall synchronously. A clearance hole is provided in the center of the bottom plate. A lifting cylinder is located below the bottom plate. The lifting cylinder... The plunger passes upward through the clearance hole and abuts against the bottom surface of the lower plate; the bottom end of the ejector pin is coaxially provided with a limiting boss, the outer diameter of which is larger than the outer diameter of the ejector pin; the top surface of the upper plate is provided with a through hole that matches the ejector pin, and the bottom surface of the upper plate is provided with a limiting hole that matches the limiting boss. The through hole and the limiting hole are connected. The ejector pin passes through the limiting hole and the through hole from bottom to top. The bottom surface of the limiting boss is flush with the bottom surface of the upper plate, and the top surface of the lower plate abuts against the bottom surface of the limiting boss. The upper plate is connected to the lower plate by connecting bolts.

[0004] When the ejector pin needs to be replaced, the fixing bolts, the base plate, the connecting bolts, and the lower plate must be removed first, which is time-consuming and labor-intensive, and may even delay the product delivery time. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application provides a mold that facilitates the replacement of ejector pins.

[0006] The mold for easy replacement of ejector pins provided in this application adopts the following technical solution:

[0007] A mold for easy ejector pin replacement includes an upper mold and a lower mold. The lower mold has an ejector pin groove through which the ejector pin passes and slides. An injection groove is provided on the top surface of the lower mold, and the ejector pin groove communicates with the injection groove. The top surface of the ejector pin abuts against the bottom surface of the product. A side plate, a bottom plate, an upper plate, and a lower plate are provided below the lower mold. The side plate is fixedly connected to the bottom surface of the lower mold, the bottom plate is connected to the side plate by fixing bolts, and the upper plate is connected to the lower plate by connecting bolts. The upper and lower plates rise and fall synchronously. A limiting boss is coaxially provided at the bottom end of the ejector pin, and the outer diameter of the limiting boss is larger than that of the ejector pin. The upper plate has a through hole on its top surface that matches the ejector pin, and a limiting hole on its bottom surface that matches the limiting boss. The through hole and the limiting hole are connected. The ejector pin passes through the limiting hole and the through hole from bottom to top. The bottom surface of the limiting boss is flush with the bottom surface of the upper plate. The top surface of the lower plate abuts against the bottom surface of the limiting boss. The lower plate has a mounting hole that connects to the limiting hole. The diameter of the mounting hole is larger than the diameter of the limiting hole. A headless screw is threaded into the mounting hole. The bottom plate has a removal hole that connects to the mounting hole. The diameter of the removal hole is larger than the diameter of the mounting hole.

[0008] Preferably, a clearance hole is provided in the center of the base plate, and a lifting cylinder is provided below the base plate. The piston rod of the lifting cylinder passes upward through the clearance hole and abuts against the bottom surface of the lower plate.

[0009] Preferably, the ejector pins are located at the four corners of the product.

[0010] Preferably, guide rods are provided at the four corners of the upper plate, and guide holes are provided on the lower mold for the guide rods to pass through.

[0011] In summary, this application includes the following beneficial technical effects:

[0012] Improve the ease of replacing ejector pins, saving time and effort, and ensuring that products can be delivered safely and on time. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of a mold in related technologies.

[0014] Figure 2 This is a cross-sectional structural diagram of a mold that facilitates the replacement of ejector pins, as described in an embodiment of this application.

[0015] Explanation of reference numerals in the attached drawings: 1. Upper mold; 2. Lower mold; 21. Ejector groove; 22. Injection groove; 23. Guide hole; 3. Ejector pin; 31. Limiting boss; 4. Product; 5. Side plate; 51. Fixing bolt; 6. Base plate; 61. Pick-up hole; 62. Clearance hole; 7. Upper plate; 71. Through hole; 72. Limiting hole; 73. Guide rod; 8. Lower plate; 81. Mounting hole; 82. Headless screw; 9. Connecting bolt. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-2This application will be described in further detail.

[0017] This application discloses a mold that facilitates the replacement of ejector pins.

[0018] Reference Figure 1-2 The mold for easy replacement of ejector pin 3 includes an upper mold 1 and a lower mold 2. The lower mold 2 has an ejector pin groove 21 through which the ejector pin 3 passes and slides. An injection groove 22 is provided on the top surface of the lower mold 2, and the ejector pin groove 21 communicates with the injection groove 22. The top surface of the ejector pin 3 abuts against the bottom surface of the product 4. The lower mold 2 is provided with a side plate 5, a bottom plate 6, an upper plate 7, and a lower plate 8. The side plate 5 is located on both sides of the lower mold 2 and is fixedly connected to the bottom surface of the lower mold 2. The bottom plate 6 is connected to the side plate 5 by fixing bolts 51. The upper plate 7 is connected to the lower plate 8 by connecting bolts 9. The upper plate 7 and the lower plate 8 rise and fall synchronously. A limiting boss 31 is coaxially provided at the bottom end of the ejector pin 3. The outer diameter of the limiting boss 31 is larger than that of the ejector pin 3. The outer diameter of the upper plate 7 is as follows: the top surface of the upper plate 7 is provided with a through hole 71 that matches the ejector pin 3; the bottom surface of the upper plate 7 is provided with a limiting hole 72 that matches the limiting boss 31; the through hole 71 and the limiting hole 72 are connected; the ejector pin 3 passes through the limiting hole 72 and the through hole 71 from bottom to top; the bottom surface of the limiting boss 31 is flush with the bottom surface of the upper plate 7; the top surface of the lower plate 8 abuts against the bottom surface of the limiting boss 31; the lower plate 8 is provided with a mounting hole 81 that matches the limiting hole 72; the diameter of the mounting hole 81 is larger than the diameter of the limiting hole 72; a headless screw 82 is threaded into the mounting hole 81; the bottom plate 6 is provided with a removal hole 61 that matches the mounting hole 81; the diameter of the removal hole 61 is larger than the diameter of the mounting hole 81.

[0019] A clearance hole 62 is provided in the center of the base plate 6, and a lifting cylinder is provided below the base plate 6. The piston rod of the lifting cylinder passes upward through the clearance hole 62 and abuts against the bottom surface of the lower plate 8.

[0020] The ejector pins 3 are located at the four corners of the product 4 to improve the uniformity of force when the product 4 is pushed out.

[0021] Guide rods 73 are provided at the four corners of the upper plate 7, and guide holes 23 are provided on the lower mold 2 for the guide rods 73 to pass through. When stripping is required, the upper mold 1 is removed first, and then the upper plate 7 and the lower plate 8 are driven to move upward together. The guide rods 73 rise and fall within the guide holes 23 to improve the stability of the ejector pin 3 movement.

[0022] The implementation principle of a mold that facilitates the replacement of ejector pins 3 in this application embodiment is as follows:

[0023] When it is necessary to disassemble the ejector pin 3, simply remove the headless screw 82, and then use a thin needle to push the ejector pin 3 downwards from top to bottom. The ejector pin 3 will then be removed from the mold through the removal hole 61, which greatly saves the disassembly and assembly time of the ejector pin 3, improves the convenience of replacing the ejector pin 3, saves time and effort, and ensures that the product 4 can be delivered safely and on time.

[0024] 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 facilitating replacement of a pin, characterized by: The upper die and the lower die are provided, the lower die is provided with a ejector pin slot through which the ejector pin passes and slides, the top surface of the lower die is provided with an injection slot, the ejector pin slot is communicated with the injection slot, the top surface of the ejector pin is abutted with the bottom surface of the product; the lower part of the lower die is provided with a side plate, a bottom plate, an upper plate and a lower plate, the side plate is fixedly connected with the bottom surface of the lower die, the bottom plate is connected with the side plate through fixing bolts, the upper plate is connected with the lower plate through connecting bolts, the upper plate and the lower plate are synchronously lifted; the bottom end of the ejector pin is coaxially provided with a limiting boss, the outer diameter of the limiting boss is larger than the outer diameter of the ejector pin, the top surface of the upper plate is provided with a through hole matched with the ejector pin, the bottom surface of the upper plate is provided with a limiting hole matched with the limiting boss, the through hole is communicated with the limiting hole, the ejector pin passes through the limiting hole and the through hole from bottom to top, the bottom surface of the limiting boss is flush with the bottom surface of the upper plate, the top surface of the lower plate is abutted with the bottom surface of the limiting boss, the lower plate is provided with a mounting hole communicated with the limiting hole, the diameter of the mounting hole is larger than the diameter of the limiting hole, a headless screw is threadedly connected in the mounting hole, the bottom plate is provided with a taking hole communicated with the mounting hole, the diameter of the taking hole is larger than the diameter of the mounting hole.

2. The mold facilitating the replacement of a pin of claim 1, wherein: The center of the bottom plate is provided with a let-out hole, the bottom part of the bottom plate is provided with a jacking cylinder, the piston rod of the jacking cylinder is upwardly passed through the let-out hole and is abutted with the bottom surface of the lower plate.

3. The mold facilitating the replacement of a pin of claim 1, wherein: The ejector pin is arranged at the four corners of the product.

4. The pin replacement facilitating mold of claim 1, wherein: The upper plate is provided with a guide rod at the four corners, the lower die is provided with a guide hole through which the guide rod passes out.

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