Secondary ejection mold for plastic product

Abstract

The utility model discloses a secondary ejection mold for a plastic product, and relates to the technical field of plastic products. The mold comprises a mold body, the mold body is provided with a mold groove and an inner groove which are used in cooperation, and an ejection mechanism and a connecting mechanism which are used in cooperation with the mold body are arranged in the inner groove and the mold groove. The ejection mechanism comprises an electric push rod, and the tail end of the output end of the electric push rod is fixedly inserted into the middle of the bottom end of the inner groove. Through the arrangement and use of the ejection mechanism, the ejection plate and the ejector pin can be driven to synchronously move upwards during demolding to realize one-time ejection, the ejection area of a plastic product is effectively increased, and the ejector pin can be driven to move upwards at multiple speeds when a gear is meshed with a rack II, so that a height difference can be gradually formed between the ejector pin and the ejection plate; and secondary ejection can be achieved, so that the deformation phenomenon of the plastic product can be avoided, in addition, the plastic product can be conveniently extracted through secondary ejection, and the operation convenience is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic product technology, specifically to a secondary ejection mold for plastic products. Background Technology

[0002] Plastic mold is a type of mold used for compression molding, extrusion molding, injection molding, blow molding, and low-foaming molding. It involves injecting raw materials into the mold cavity through the injection port and then processing them into plastic parts of different shapes after cooling and solidification. Plastic products are usually ejected from the mold by an ejection mechanism when demolding.

[0003] However, the ejection mechanisms on existing molds for processing plastic products generally use single ejection, which makes ejection difficult, extraction difficult, and the ejection area is small, which makes it easy for plastic products to deform during ejection.

[0004] To address the aforementioned problems, this application proposes a secondary ejection mold for plastic products to solve these issues. Utility Model Content

[0005] In order to solve the problems of the common single ejection mechanism and small ejection area in the ejection mechanism of existing plastic product processing molds, the purpose of this utility model is to provide a secondary ejection mold for plastic products.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a secondary ejection mold for plastic products, including a mold body, a mold groove and an inner groove for cooperating use on the mold body, and an ejection mechanism and a connecting mechanism for cooperating with the mold body are provided in the inner groove and the mold groove.

[0007] The ejection mechanism includes an electric push rod, the output end of which is fixedly inserted into the middle of the bottom of the inner groove. A top bracket is fixedly sleeved on the electric push rod. A sliding hole is provided between the inner groove and the mold groove, allowing the electric push rod to slide through the sliding hole. Symmetrically arranged push rods are fixedly installed on the top bracket, and these push rods slide through the mold groove and are fixedly connected at their ends to a top plate that mates with the mold groove. Guide rods are fixedly installed at the four corners of the bottom of the top plate, and these guide rods are slidably inserted into the mold body. Symmetrically distributed guide holes are provided at the bottom of the inner cavity of the mold groove, and the guide rods are slidably inserted into the guide holes. Both ends of the top bracket are slidably connected to a rack, and the top of the rack is fixedly connected to... The device has a horizontal plate, with slide rods fixedly inserted at both ends of the top frame. A rack is slidably fitted onto the slide rods. Insertion holes are opened through both sides of the top frame, and slide rods are fixedly inserted into the insertion holes. An array of ejector pins is detachably installed on the horizontal plate, and the ejector pins slide through the top plate. Rotary shafts are rotatably inserted into both sides of the top of the top frame, and gears are fixedly fitted in the middle of the rotating shafts. Rotary holes are opened through both sides of the top of the top frame, and rotating shafts are rotatably inserted into the rotating holes. The gears mesh with rack one, and torsion springs are fixedly installed on both sides of the gears. The ends of the torsion springs are fixedly connected to the top frame. Rack two is fixedly installed on the upper ends of the inner walls on both sides of the inner groove, and the gears can mesh with rack two.

[0008] Preferably, the connecting mechanism includes a screw sleeve and a screw rod. The screw sleeve is fixedly installed on the top of the horizontal plate and is arranged in an array. The screw rod is fixedly installed on the bottom of the ejector pin and can be threaded into the screw sleeve.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. By setting and using the ejection mechanism, the ejector plate and ejector pin can be moved upward synchronously during demolding to achieve one ejection and effectively increase the ejection area of ​​the plastic product. When the gear and rack mesh, the ejector pin can be driven to move upward at double speed, so that a height difference can be gradually formed between the ejector pin and the ejector plate, thereby achieving a second ejection. This can prevent the plastic product from deforming. In addition, the second ejection makes it easier to remove the plastic product, thus effectively improving the convenience of operation.

[0011] 2. The connection mechanism facilitates the connection, fixation, and separation of the ejector pin and the cross plate, thereby making it easier to replace the ejector pin and further improving the ease of operation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the installation of the connecting mechanism in this utility model.

[0015] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0016] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point B.

[0017] Figure 5 This utility model Figure 2 Enlarged schematic diagram of the structure at point C.

[0018] In the diagram: 1. Mold body; 11. Mold groove; 12. Inner groove; 13. Sliding hole; 14. Guide hole; 2. Ejection mechanism; 21. Electric push rod; 22. Ejector frame; 23. Ejector rod; 24. Ejector plate; 25. Rack 1; 26. Horizontal plate; 27. Ejector pin; 28. Rotating shaft; 29. ​​Gear; 210. Torsion spring; 211. Rack 2; 212. Guide rod; 213. Sliding rod; 214. Insertion hole; 215. Rotating hole; 3. Connecting mechanism; 31. Screw sleeve; 32. Screw. Detailed Implementation

[0019] 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.

[0020] Example: Figures 1-5 As shown, this utility model provides a secondary ejection mold for plastic products, including a mold body 1, on which a mold groove 11 and an inner groove 12 are provided for cooperation, and an ejection mechanism 2 and a connecting mechanism 3 for cooperation with the mold body 1 are provided in the inner groove 12 and the mold groove 11.

[0021] The ejection mechanism 2 includes an electric push rod 21. The output end of the electric push rod 21 is fixedly inserted into the middle of the bottom end of the inner groove 12, and a top bracket 22 is fixedly sleeved on the electric push rod 21. A sliding hole 13 is provided between the inner groove 12 and the mold groove 11, and the electric push rod 21 can slide through the sliding hole 13. The setting of the sliding hole 13 ensures the normal movement of the electric push rod 21. A symmetrically arranged top rod 23 is fixedly installed on the top bracket 22, and the top rod 23 slides through the mold groove 11 and is fixedly connected at its end to a part of the mold groove. The top plate 24, used in conjunction with mold body 11, has guide rods 212 fixedly installed at each of its four bottom corners. The guide rods 212 are slidably inserted into the mold body 1. Symmetrically distributed guide holes 14 are provided at the bottom of the inner cavity of the mold groove 11, and the guide rods 212 are slidably inserted into the guide holes 14. The cooperation between the guide rods 212 and the guide holes 14 limits and guides the movement of the top plate 24. Both ends of the top frame 22 are slidably connected to racks 25, and a horizontal plate 26 is fixedly connected to the top of the racks 25. Both ends of the top frame 22 are fixedly connected to slide rods 213, and rack 25 is slidably sleeved on slide rods 213. Insertion holes 214 are provided through both sides of the top frame 22, and slide rods 213 are fixedly inserted into the insertion holes 214. The cooperation between slide rods 213 and insertion holes 214 provides a limiting and guiding function for the sliding adjustment of rack 25. An array of ejector pins 27 are detachably provided on the horizontal plate 26, and ejector pins 27 slide through the top plate 24. Rotary shafts 28 are rotatably inserted into both sides of the top of the top frame 22, and the middle of the rotating shaft 28... The gear 29 is fixedly sleeved in the top part. The top of the top frame 22 has through holes 215 on both sides, and the rotating shaft 28 is rotatably inserted into the holes 215. The use of the holes 215 provides a guarantee for the stable rotation of the rotating shaft 28. The gear 29 meshes with the rack 25. The torsion springs 210 are fixedly installed on both sides of the gear 29. The ends of the torsion springs 210 are fixedly connected to the top frame 22. The racks 211 are fixedly installed on the upper ends of the inner walls on both sides of the inner groove 12, and the gear 29 can mesh with the racks 211.

[0022] By adopting the above technical solution, when demolding is required, the electric push rod 21 needs to be activated, which can drive the ejector frame 22 to move upward, thereby driving the ejector rod 23, rack 25 and gear 29 to move upward synchronously, and further driving the ejector plate 24 and ejector pin 27 to move upward synchronously to achieve one ejection. When gear 29 meshes with rack 211, it will drive rack 25 to move upward at double speed while the ejector plate 24 and ejector pin 27 move upward synchronously, and twist the torsion spring 210, thereby driving ejector pin 27 to move upward at double speed, thereby gradually forming a height difference between ejector pin 27 and ejector plate 24, and further achieving a second ejection. After that, the demolded plastic product can be removed and the ejector plate 24 and ejector pin 27 can be moved down and reset.

[0023] The connecting mechanism 3 includes a screw sleeve 31 and a screw rod 32. The screw sleeve 31 is fixedly installed on the top of the horizontal plate 26 and is arranged in an array. The screw rod 32 is fixedly installed on the bottom of the ejector pin 27 and can be threaded into the screw sleeve 31.

[0024] By adopting the above technical solution, when the ejector mechanism 2 is in the secondary ejection state, the ejector pin 27 can be rotated, thereby driving the corresponding screw 32 to rotate and gradually separate it from the corresponding screw sleeve 31. When the screw 32 is completely separated from the corresponding screw sleeve 31, the corresponding ejector pin 27 can be pulled out and replaced.

[0025] Working principle: When demolding is required, the electric push rod 21 is activated, which drives the ejector frame 22 to move upward, which in turn drives the ejector rod 23, rack 25 and gear 29 to move upward synchronously, and further drives the ejector plate 24 and ejector pin 27 to move upward synchronously to achieve one ejection. When gear 29 meshes with rack 211, it will drive rack 25 to move upward at double speed while the ejector plate 24 and ejector pin 27 move upward synchronously, and twist the torsion spring 210, which will drive ejector pin 27 to move upward at double speed, so that a height difference is gradually formed between ejector pin 27 and ejector plate 24, and a second ejection can be achieved. After that, the demolded plastic product is removed and the ejector plate 24 and ejector pin 27 are moved down and reset.

[0026] During subsequent use, when the ejection mechanism 2 is in the secondary ejection state, the ejector pin 27 can be rotated, thereby driving the corresponding screw 32 to rotate and gradually separating it from the corresponding sleeve 31. When the screw 32 is completely separated from the corresponding sleeve 31, the corresponding ejector pin 27 can be pulled out and replaced.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A secondary ejection mold for plastic products, comprising a mold body (1), characterized in that: The mold body (1) is provided with a mold groove (11) and an inner groove (12) for use, and the inner groove (12) and the mold groove (11) are provided with an ejection mechanism (2) and a connecting mechanism (3) for use with the mold body (1); The ejection mechanism (2) includes an electric push rod (21). The output end of the electric push rod (21) is fixedly inserted into the middle of the bottom end of the inner groove (12). A top frame (22) is fixedly sleeved on the electric push rod (21). A symmetrically arranged top rod (23) is fixedly installed on the top frame (22). The top rod (23) slides through the mold groove (11) and is fixedly connected at its end to a top plate (24) that cooperates with the mold groove (11). Both ends of the top frame (22) are slidably connected to a rack (25). A horizontal plate (26) is fixedly connected to the top of the rack (25). The top is detachably provided with an array of ejector pins (27), and the ejector pins (27) slide through the top plate (24). The top of the top frame (22) is rotatably inserted with a rotating shaft (28) on both sides, and a gear (29) is fixedly sleeved in the middle of the rotating shaft (28). The gear (29) meshes with a rack (25), and a torsion spring (210) is fixedly installed on both sides of the gear (29). The end of the torsion spring (210) is fixedly connected to the top frame (22). A rack (211) is fixedly installed on the upper end of the inner wall on both sides of the inner groove (12), and the gear (29) can mesh with the rack (211).

2. The secondary ejection mold for plastic products as described in claim 1, characterized in that, The connecting mechanism (3) includes a screw sleeve (31) and a screw rod (32). The screw sleeve (31) is fixedly installed on the top of the horizontal plate (26) and the screw sleeves (31) are arranged in an array. The screw rod (32) is fixedly installed on the bottom of the ejector pin (27) and the screw rod (32) can be threaded into the screw sleeve (31).

3. The secondary ejection mold for plastic products as described in claim 1, characterized in that, A sliding hole (13) is provided between the inner groove (12) and the mold groove (11), and the electric push rod (21) can slide through the sliding hole (13).

4. The secondary ejection mold for plastic products as described in claim 1, characterized in that, Guide rods (212) are fixedly installed at the four corners of the bottom end of the top plate (24), and the guide rods (212) are slidably inserted into the mold body (1).

5. A secondary ejection mold for plastic products as described in claim 4, characterized in that, The bottom of the inner cavity of the mold groove (11) is provided with symmetrically distributed guide holes (14), and the guide rod (212) is slidably inserted into the guide holes (14).

6. The secondary ejection mold for plastic products as described in claim 1, characterized in that, Both ends of the top frame (22) are fixedly connected to slide rods (213), and rack 1 (25) is slidably sleeved on slide rods (213).

7. A secondary ejection mold for plastic products as described in claim 6, characterized in that, The top frame (22) has through holes (214) on both sides, and the slide rod (213) is fixedly inserted into the holes (214).

8. The secondary ejection mold for plastic products as described in claim 1, characterized in that, The top of the top frame (22) has through holes (215) on both sides, and the rotating shaft (28) is inserted into the holes (215).

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