A plastic bottle cap injection molding machine inner joint demolding track device
Patent Information
- Application Number
- CN202521929746.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-09-09
AI Technical Summary
[0003]在实际工作过程中，为了提高单次注塑瓶盖的数量，在后模动模模板上一般设置较多数量等距间隔排列的半模腔，每个半模腔内部均设置有一根顶杆，用于脱模，顶杆后端均固定在顶板上，顶板表面则穿过导向杆，用于引导顶板左右滑动，由于设置的顶杆数量较多，加之长时间使用顶板与导向杆之间往复摩擦运动次数较多，使得导向杆与四周若干根顶杆之间容易发生错位问题，导致脱模方向的水平偏差，偏差严重时，瓶盖难以进行脱模，需要拆装整个后模动模模板进行维修，费时费力
[0012]本实用新型中通过在现有顶杆和导向杆外围分别设计辅助轨道框和中心轨道框结构，结合上下对称的三角形支架结构，构成内接脱模轨道，可以在后模动模模板左右往复运动过程中跟随顶杆和导向杆共同运动，始终对顶杆和导向杆进行位置限位，利用若干滑轮与滚轮结构分别与顶杆和导向杆外侧面进行滚动摩擦，长时间工作造成的磨损损耗较小，对保护机壳内部的导向杆与四周若干根顶杆进行导向辅助，减少脱模方向的水平偏差，延长整个后模动模模板的使用寿命，保证脱模工作正常进行。
Smart Images
Figure CN224810004U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of demolding equipment for plastic bottle cap injection molding machines, and more specifically, to a demolding track device inside a plastic bottle cap injection molding machine. Background Technology
[0002] In existing plastic bottle cap injection molding machines, the front fixed mold platen and the rear moving mold platen are interconnected. Molten plastic is injected through the injection nozzle inside the front fixed mold platen, and the bottle cap body is formed inside the mold cavity. Then, the rear moving mold platen needs to be moved to demold the bottle cap body, so that the bottle cap body falls out of half of the mold cavity of the rear moving mold platen, completing the injection operation.
[0003] In actual operation, in order to increase the number of bottle caps produced per injection, a large number of equally spaced semi-cavities are generally set on the rear moving mold platen. Each semi-cavity is equipped with an ejector pin for demolding. The rear end of the ejector pin is fixed to the top plate, and guide rods pass through the surface of the top plate to guide the top plate to slide left and right. Due to the large number of ejector pins and the frequent reciprocating friction between the top plate and the guide rods over a long period of use, misalignment between the guide rods and several ejector pins around them is likely to occur, resulting in horizontal deviation in the demolding direction. When the deviation is serious, the bottle cap is difficult to demold, and the entire rear moving mold platen needs to be disassembled for repair, which is time-consuming and labor-intensive. Utility Model Content
[0004] The purpose of this invention is to provide an internal demolding track device for a plastic bottle cap injection molding machine. This internal demolding track device is used for the rear moving mold template with many half-cavities. It can guide and assist the internal guide rods and several ejector rods around the perimeter, reduce the horizontal deviation in the demolding direction, extend the service life of the entire rear moving mold template, and ensure that the demolding operation is carried out normally.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A demolding track device for a plastic bottle cap injection molding machine includes an injection molding machine base. Connecting pillars pass through the four corners of the injection molding machine base, with the front ends of the connecting pillars connected to the front mold fixed mold platen. A through hole is machined at the center of the injection molding machine base surface, and a push rod passes through the through hole. A top plate is located in front of the push rod, inside a protective housing. A rear mold moving mold platen is connected to the front of the protective housing via a screw. The surface of the rear mold moving mold platen has several horizontally and vertically arranged semi-cavities, with a push rod passing through the center of each of the semi-cavities. The rear end of the push rod... All are fixed to the surface of the top plate. The non-ejector area of the top plate surface has several through holes, and the guide rods pass through the through holes. The rear ends of the guide rods are all fixed to the surface of the injection molding machine base. Several internal demolding tracks are provided between the ejector rods and the guide rods. Each internal demolding track includes a central track frame and several auxiliary track frames located on the upper and lower sides of the central track frame. The auxiliary track frames located on the upper and lower sides are distributed on the same straight line and are staggered in the vertical plane. The auxiliary track frames located on the same side are connected in series by triangular brackets.
[0007] As a further optimization of this solution, the transverse section of the triangular bracket is connected in series with all auxiliary track frames on the same side of an inner demolding track, and the two oblique sections of the triangular bracket are fixedly connected inward to the front and rear ends of the outer side of the central track frame.
[0008] As a further optimization of this solution, in the aforementioned auxiliary track frames, the hollow area inside each auxiliary track frame is connected to a ring inward by left and right connecting rods. The ring is connected to several pulleys at intervals by a rotating bearing, and the area between the pulleys passes through a top rod.
[0009] As a further optimization of this solution, the inner side of the central track frame is provided with several sets of limiting brackets, each set of limiting brackets including parallel brackets arranged diagonally forward and backward. A rotating shaft is connected between the outer ends of the parallel brackets, and rollers are rotatably connected to the shaft. A guide rod passes through the area between the rollers.
[0010] As a further optimization of this solution, the surface of the injection molding machine base is provided with several rear end limiting baffles, both sides of the top plate are provided with front end limiting baffles, and the front end of the guide rod is provided with a gasket.
[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows:
[0012] This invention designs auxiliary track frames and a central track frame structure around the existing ejector rod and guide rod, respectively, and combines them with a symmetrical triangular support structure to form an internal demolding track. This track can move together with the ejector rod and guide rod during the reciprocating motion of the rear mold moving mold platen, always limiting the position of the ejector rod and guide rod. Several pulleys and rollers are used to roll and rub against the outer surfaces of the ejector rod and guide rod, resulting in less wear and tear over long-term operation. This design also provides guidance and assistance to the guide rod inside the protective housing and several ejector rods around it, reducing horizontal deviation in the demolding direction, extending the service life of the entire rear mold moving mold platen, and ensuring normal demolding operation. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the internal structure of the protective housing of this utility model (with parts of the protective housing, rear mold moving mold template, top plate, ejector rod and guide rod structure removed);
[0014] Figure 2 This is a schematic diagram of the connection structure between the auxiliary track frame and the central track frame of this utility model (excluding part of the top plate, top rod, and guide rod structure);
[0015] Figure 3 This is a schematic diagram of the internal structure of the auxiliary track frame of this utility model;
[0016] Figure 4 This is a schematic diagram of the internal structure of the central track frame of this utility model;
[0017] In the diagram: 1. Injection molding machine base; 2. Connecting column; 3. Limiting baffle; 4. Push rod; 5. Top plate; 6. Protective housing; 7. Screw; 8. Rear mold moving mold platen; 9. Half mold cavity; 10. Ejector rod; 11. Baffle; 12. Guide rod; 13. Gasket; 14. Central track frame; 15. Triangular bracket; 16. Auxiliary track frame; 17. Connecting rod; 18. Ring; 19. Pulley; 20. Parallel bracket; 21. Rotating shaft; 22. Roller. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.
[0019] To address the issue that each half-cavity of the existing mold has an ejector pin, and that due to production requirements, a large number of bottle caps need to be demolded at one time, resulting in a large number of ejector pins, coupled with the frequent reciprocating friction between the ejector plate and the guide pin over a long period of use, misalignment can easily occur between the guide pin and several ejector pins around it. This leads to horizontal deviation in the demolding direction, and when the deviation is severe, the bottle cap is difficult to demold, requiring the disassembly and reassembly of the entire rear moving mold plate for repair, which is time-consuming and labor-intensive;
[0020] like Figure 1 As shown, this application includes an injection molding machine base 1. Connecting columns 2 pass through the four corners of the injection molding machine base 1. The front end of the connecting columns 2 is connected to the front mold fixed mold plate. A through hole is machined at the center of the surface of the injection molding machine base 1, and a push rod 4 passes through the through hole. A top plate 5 is provided in front of the push rod 4. The top plate 5 is located inside the protective housing 6. A rear mold moving mold plate 8 is connected to the front of the protective housing 6 through a screw 7. A number of horizontally and vertically arranged semi-mold cavities 9 are machined on the surface of the rear mold moving mold plate 8. A push rod 10 passes through the center of the number of semi-mold cavities 9. The rear ends of the push rod 10 are fixed to the surface of the top plate 5.
[0021] like Figure 2 As shown, the surface of the top plate 5, in the area not containing the ejector rod 10, has several through holes through which the guide rod 12 passes. The rear ends of the guide rod 12 are all fixed to the surface of the injection molding machine base 1. Several internal demolding tracks are provided between the ejector rod 10 and the guide rod 12. Each internal demolding track includes a central track frame 14 and several auxiliary track frames 16 located on the upper and lower sides of the central track frame. The auxiliary track frames 16 located on the upper and lower sides are distributed on the same straight line and are staggered in the vertical plane. The auxiliary track frames 16 located on the same side are connected in series by a triangular bracket 15. The horizontal section of the triangular bracket 15 connects all the auxiliary track frames 16 on the same side of an internal demolding track. The two oblique sections of the triangular bracket 15 are fixedly connected inward to the front and rear ends of the outer side of the central track frame 14.
[0022] like Figure 3 As shown, in several auxiliary track frames 16, the hollow area inside each auxiliary track frame 16 is connected to a ring 18 inward through left and right connecting rods 17. Several pulleys 19 are rotatably connected to the ring 18 through a rotating bearing. The area between the pulleys 19 passes through the top rod 10.
[0023] like Figure 4 As shown, the inner side of the central track frame 14 is surrounded by several sets of limiting brackets, each set of limiting brackets includes parallel brackets 20 arranged diagonally forward and backward, a rotating shaft 21 is connected between the outer ends of the parallel brackets 20, a roller 22 is rotatably connected on the shaft of the rotating shaft 21, and a guide rod 12 passes through the area between the rollers 22.
[0024] Specifically, the injection molding machine base 1 has several rear end limiting baffles 3 on its surface to limit the sliding position of the top plate 10. Both sides of the top plate 10 have forward-facing limiting baffles 11 to limit the sliding position of the top plate 10 in front. The guide rod 12 has a pad 13 at its front end to buffer and protect the inner surface of the machine housing 6 from collisions. During operation, the auxiliary track frame 16 and the central track frame 14, combined with the vertically staggered and symmetrical triangular brackets 15, form an internal demolding track. The adjacent internal demolding tracks are staggered, allowing for demolding in the rear mold. During the reciprocating motion of the moving mold platen 8, it moves together with the ejector rod 10 and guide rod 12, constantly limiting the position of the ejector rod 10 and guide rod 12 in all directions. Several pulleys 19 and rollers 22 are used to roll and rub against the outer surfaces of the ejector rod 10 and guide rod 12, reducing wear caused by long-term operation. The guide rod 12 inside the protective housing 6 and several ejector rods 10 around it are guided and assisted, reducing horizontal deviation in the demolding direction, extending the service life of the entire rear mold moving mold platen, and ensuring normal demolding operation.
[0025] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as screws, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0026] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A demolding track device for a plastic bottle cap injection molding machine, comprising an injection molding machine base, wherein connecting columns pass through the four corners of the injection molding machine base, the front ends of the connecting columns are connected to the front mold fixed mold plate, a through hole is machined at the center of the surface of the injection molding machine base and a push rod passes through the through hole, a top plate is provided in front of the push rod, the top plate is located inside a protective housing, a rear mold moving mold plate is connected to the front of the protective housing via a screw, a plurality of horizontally and vertically arranged semi-cavities are machined on the surface of the rear mold moving mold plate, wherein a push rod passes through the center of the plurality of semi-cavities, the rear ends of the push rods are fixed to the surface of the top plate, a plurality of through holes are provided on the non-push rod area of the top plate and guide rods pass through the through holes, the rear ends of the guide rods are fixed to the surface of the injection molding machine base, characterized in that: The ejector rod and the guide rod are provided with several internal demolding tracks. Each internal demolding track includes a central track frame and several auxiliary track frames located on the upper and lower sides of the central track frame. The auxiliary track frames located on the upper and lower sides are distributed on the same straight line and are staggered in the vertical plane. The auxiliary track frames located on the same side are connected in series by triangular brackets.
2. The internal demolding track device for a plastic bottle cap injection molding machine according to claim 1, characterized in that: The transverse section of the triangular bracket is connected in series with all auxiliary track frames on the same side of an inner demolding track, and the two oblique sections of the triangular bracket are fixedly connected inward to the front and rear ends of the outer side of the central track frame.
3. The internal demolding track device for a plastic bottle cap injection molding machine according to claim 2, characterized in that: In each of the auxiliary track frames, the hollow area inside each auxiliary track frame is connected to a ring by left and right connecting rods. The ring is connected to several pulleys at intervals by rotating bearings, and the area between the pulleys passes through a top rod.
4. The internal demolding track device for a plastic bottle cap injection molding machine according to claim 3, characterized in that: The inner side of the central track frame is surrounded by several sets of limiting brackets, each set of limiting brackets including parallel brackets arranged diagonally forward and backward. A rotating shaft is connected between the outer ends of the parallel brackets, and rollers are rotatably connected to the shaft. A guide rod passes through the area between the rollers.
5. The internal demolding track device for a plastic bottle cap injection molding machine according to claim 4, characterized in that: The injection molding machine base surface is provided with several rear end limiting baffles, the top plate has front end limiting baffles on both sides, and the guide rod has a gasket at the front end.