Injection molding mechanism of injection molding machine

Abstract

The utility model relates to the technical field of injection molding equipment, and discloses an injection molding mechanism of an injection molding machine, which comprises an operation table, the upper end of the operation table is fixedly connected with a static template, one side of the static template is fixedly connected with a movable cylinder, the upper end of the movable cylinder is fixedly communicated with a connecting pipe, and the upper end of the connecting pipe is fixedly communicated with an air delivery pipe. An air pump is fixedly connected to one corner of the upper end of the operation table, the output end of the air pump fixedly communicates with one end of the air conveying pipe, a movable block is fixedly connected to the interior of the movable cylinder, a blocking block is fixedly connected to one side of the movable block, and a mounting frame is fixedly connected to one side of the static mold plate. When demolding is needed after the device completes injection molding work, plastic parts can be pushed to be demolded in a gas pushing mode, compared with traditional pushing rod demolding, the probability that the plastic parts are damaged is lower, and the injection molding quality of the plastic parts is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to the injection mechanism of an injection molding machine. Background Technology

[0002] Injection molding machines are the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The working principle of an injection molding machine is similar to that of a syringe. It uses the thrust of a screw to inject the plasticized molten plastic into a closed mold cavity, and then obtains the product after solidification and shaping. Injection molding is a cyclical process.

[0003] A search revealed that Chinese Patent Publication No. CN213166535U discloses an injection molding machine, including a support box. Support rods are connected to the top of the support box, and each support rod has a connecting platform fixedly connected to its top. An injection molding device is fixedly connected to the top of the connecting platform. A movable door is fixedly connected to one side of the support box, and a door handle is fixedly connected to the outer surface of the movable door. During injection molding, a fixed slot block is fixed to both sides of the injection area. A second connecting slider can slide within a groove in the fixed slot block. A baffle plate is connected to one side of the second connecting slider. When the device is in injection mode, the second connecting slider is inserted into the fixed slot block, allowing the baffle plate to cover the areas on both sides during injection, thus enhancing protection during the injection process.

[0004] However, in the prior art, when demolding injection-molded plastic parts, ejector pins are usually used to push the plastic parts out of the mold. However, since the plastic parts that have just been injection-molded are relatively soft, pushing them out with ejector pins at this time can easily damage the exterior of the plastic parts and affect their quality. A solution is proposed to solve the problems mentioned in the background art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an injection mechanism for an injection molding machine, which aims to improve the problem that when demolding injection-molded plastic parts, push rods are usually used to push the plastic parts to demold. However, since the plastic parts are relatively soft after injection molding, pushing them to demold with push rods at this time can easily damage the exterior of the plastic parts and affect the quality of the plastic parts.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: It includes an operating table, with a stationary template fixedly connected to its upper end. A movable cylinder is fixedly connected to one side of the stationary template. A connecting pipe is fixedly connected to the upper end of the movable cylinder, and an air supply pipe is fixedly connected to the upper end of the connecting pipe. An air pump is fixedly connected to one corner of the upper end of the operating table, and the output end of the air pump is fixedly connected to one end of the air supply pipe. A movable block is fixedly connected inside the movable cylinder, and a blocking block is fixedly connected to one side of the movable block. A mounting frame is fixedly connected to one side of the stationary template, and a first electric push rod is fixedly connected to the upper end of the mounting frame. The output end of the first electric push rod is fixedly connected to one side of the movable block. Reinforcing ribs are fixedly connected to both sides of one side of the stationary template. An air hole is opened in the middle of the stationary template, and one end of the blocking block is inserted into the air hole.

[0007] As a further description of the above technical solution: When demolding is required after the device completes injection molding, the movable block can be moved inside the movable cylinder by starting the No. 1 electric push rod. The moving movable block will drive the blocking block to move, so that the end of the blocking block is pulled out of the air hole of the stationary template and the blockage of the connecting pipe is released. Then, the air pump is started, and the air pump inputs gas into the connecting pipe through the air supply pipe and blows it to the side of the injection-molded plastic part through the air hole, so that the plastic part can be demolded and separated from the stationary template. After demolding is completed, the blocking block is reset by the No. 1 electric push rod, so that the end of the blocking block is reinserted into the air hole.

[0008] Preferably, a material feeding trough is fixedly connected to the lower end of the operating table, and a buffer frame is slidably connected inside the material feeding trough.

[0009] As a further description of the above technical solution: the feeding trough can be used to receive the plastic parts after demolding.

[0010] Preferably, sliders are fixedly connected to both sides of the buffer frame, and grooves are provided on both sides of the feeding trough.

[0011] As a further description of the above technical solution: the slider can move within the groove when the buffer frame is under force.

[0012] Preferably, the outer surfaces of the two sliders are slidably connected to the interior of the two grooves, and a sliding rod is fixedly connected to the lower end of the slider.

[0013] As a further description of the above technical solution: the slide bar can make the movement of its movable frame more stable.

[0014] Preferably, the outer surfaces of the two slide rods are slidably connected to the two sides of the feeding trough, and the lower ends of the two sliders are fixedly connected to springs.

[0015] As a further description of the above technical solution: when its buffer frame is subjected to the force generated by the plastic part, it will move down and drive the slider to move in the groove. After moving, it will compress the spring. The spring can buffer the impact force of falling at this time through deformation.

[0016] Preferably, the lower ends of the two springs are fixedly connected to the two sides of the feeding trough, and the buffer frame is rotatably connected to a rolling rod inside.

[0017] As a further description of the above technical solution: the rolling bar above the buffer frame can assist the plastic parts to slide down.

[0018] Preferably, a second electric push rod is fixedly connected to the upper end of the operating table, and a moving template is fixedly connected to the output end of the second electric push rod.

[0019] As a further description of the above technical solution: the No. 2 electric push rod can be used to move the template.

[0020] Preferably, sliding rods are fixedly connected to all four sides of the static template, and the outer surfaces of the four sliding rods are slidably connected to the four sides of the moving template. An injection hole is opened in the middle of the moving template, and an injection tube is fixedly connected to one side of the moving template.

[0021] As a further description of the above technical solution: the injection tube can be used to inject molten plastic for injection molding.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] 1. In this utility model, when demolding is required after the device completes injection molding, the movable block can be moved inside the movable cylinder by starting the No. 1 electric push rod. The moving movable block will drive the blocking block to move, so that the end of the blocking block is pulled out of the air hole of the stationary template and the blockage of the connecting pipe is released. Then, the air pump is started, and the air pump inputs gas into the connecting pipe through the air supply pipe and blows it to the side of the injection-molded plastic part through the air hole, so that the plastic part can be demolded and separated from the stationary template. After demolding is completed, the blocking block is reset by the No. 1 electric push rod, so that the end of the blocking block is reinserted into the air hole. In this way, when demolding is required after the device completes injection molding, the plastic part can be pushed and demolded by gas. Compared with the traditional push rod demolding, the probability of damage to the plastic part is lower, and the injection molding quality of the plastic part is improved.

[0024] 2. In this utility model, the plastic parts that fall off the demolding machine will fall into the material discharge groove through the holes and slots opened on the operating table. When the plastic parts fall, they will come into contact with the buffer frame. When the buffer frame is subjected to the force generated by the plastic parts, it will move down and drive the slider to move in the groove. After moving, it will compress the spring. The spring can buffer the impact force of falling at this time through deformation. The plastic parts are assisted to slide down by the rolling rod above. In this way, when the plastic parts are demolded and falling, the buffer frame can buffer the falling plastic parts and reduce the damage to the plastic parts during demolding and material discharge. Attached Figure Description

[0025] Figure 1 This is a perspective view of the injection mechanism of the injection molding machine proposed in this utility model;

[0026] Figure 2 This is a three-dimensional structural diagram of the other side of the injection mechanism of the injection molding machine proposed in this utility model.

[0027] Figure 3 This is a three-dimensional structural cross-sectional view of the moving template and movable cylinder parts in the injection mechanism of the injection molding machine proposed in this utility model;

[0028] Figure 4 The injection mechanism of the injection molding machine proposed in this utility model Figure 2 Enlarged 3D structural diagram at point A.

[0029] Legend:

[0030] 1. Operating table; 2. Static template; 3. Material feed chute; 4. Sliding rod; 5. Moving template; 6. Injection hole; 7. Electric push rod No. 2; 8. Connecting pipe; 9. Air supply pipe; 10. Movable cylinder; 11. Electric push rod No. 1; 12. Mounting bracket; 13. Air pump; 14. Reinforcing rib; 15. Slide groove; 16. Slider; 17. Air hole; 18. Injection tube; 19. Buffer frame; 20. Rolling rod; 21. Blocking block; 22. Movable block; 23. Spring; 24. Sliding rod. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1 to 3As shown, one embodiment of this utility model includes an operating table 1. A static template 2 is fixedly connected to the upper end of the operating table 1. A movable cylinder 10 is fixedly connected to one side of the static template 2. A connecting pipe 8 is fixedly connected to the upper end of the movable cylinder 10. An air supply pipe 9 is fixedly connected to the upper end of the connecting pipe 8. An air pump 13 is fixedly connected to one corner of the upper end of the operating table 1. The output end of the air pump 13 is fixedly connected to one end of the air supply pipe 9. A movable block 22 is fixedly connected inside the movable cylinder 10. A blocking block 21 is fixedly connected to one side of the movable block 22. A mounting frame 12 is fixedly connected to one side of the static template 2. A first electric push rod 11 is fixedly connected to the upper end of the mounting frame 12. The output end of the first electric push rod 11 is fixedly connected to one side of the movable block 22. Reinforcing ribs 14 are fixedly connected to both sides of one side of the static template 2. An air hole 17 is opened in the middle of the static template 2. One end of the blocking block 21 is inserted into the air hole 17.

[0033] In this embodiment, when demolding is required after the device completes injection molding, the first electric push rod 11 can be activated to pull the movable block 22 to move within the movable cylinder 10. The moving movable block 22 will drive the blocking block 21 to move, so that the end of the blocking block 21 is pulled out of the air hole 17 of the stationary template 2 and the blockage of the connecting pipe 8 is released. Then, the air pump 13 is activated, and the air pump 13 inputs gas into the connecting pipe 8 through the air supply pipe 9 and blows it towards the side of the injection-molded plastic part through the air hole 17, so that the plastic part can be demolded and separated from the stationary template 2. After demolding is completed, the first electric push rod 11 is used to reset the blocking block 21, so that the end of the blocking block 21 is reinserted into the air hole 17. In this way, when demolding is required after the device completes injection molding, the plastic part can be pushed and demolded by gas. Compared with the traditional push rod demolding, the probability of damage to the plastic part is lower, and the injection molding quality of the plastic part is improved.

[0034] Example 2, as Figures 1 to 4As shown, a material feeding trough 3 is fixedly connected to the lower end of the operating table 1. A buffer frame 19 is slidably connected inside the material feeding trough 3. Slider 16 is fixedly connected to both sides of the buffer frame 19. Slide grooves 15 are opened on both sides of the material feeding trough 3. The outer surfaces of the two sliders 16 are slidably connected to the interior of the two slide grooves 15 respectively. A slide rod 24 is fixedly connected to the lower end of the slider 16. The outer surfaces of the two slide rods 24 are slidably connected to both sides of the material feeding trough 3 respectively. A spring 23 is fixedly connected to the lower end of the two sliders 16 respectively. The lower ends of the two springs 23 are fixedly connected to both sides of the material feeding trough 3 respectively. A rolling rod 20 is uniformly rotatably connected inside the buffer frame 19. A second electric push rod 7 is fixedly connected to the upper end of the operating table 1. A moving template 5 is fixedly connected to the output end of the second electric push rod 7. Sliding rods 4 are fixedly connected to all four sides of the stationary template 2. The outer surfaces of the four sliding rods 4 are slidably connected to all four sides of the moving template 5 respectively. An injection hole 6 is opened in the middle of the moving template 5. An injection tube 18 is fixedly connected to one side of the moving template 5.

[0035] In this embodiment, the plastic part that is demolded and falls into the material discharge slot 3 through the slots on the operating table 1. When the plastic part falls, it comes into contact with the buffer frame 19. When the buffer frame 19 is subjected to the force generated by the plastic part, it will move down and drive the slider 16 to move in the slide 15. After moving, it will compress the spring 23. The spring 23 can buffer the impact force of falling at this time through deformation. The upper rolling rod 20 assists the plastic part to slide down. In this way, when the plastic part is demolded and falling, the buffer frame 19 can buffer the falling plastic part and reduce the damage to the plastic part during demolding and material discharge.

[0036] Working Principle: During operation, the second electric push rod 7 pushes the moving template 5 and the stationary template 2 to fit together, allowing injection molding to proceed through the injection tube 18. After injection molding, demolding is required. The first electric push rod 11 pulls the movable block 22 within the movable cylinder 10. This movement of the movable block 22 moves the blocking block 21, causing its end to be pulled out of the air hole 17 of the stationary template 2, simultaneously releasing the blockage on the connecting pipe 8. Then, the air pump 13 is activated, supplying gas through the air pipe 9 into the connecting pipe 8 and blowing it through the air hole 17 onto the side of the molded plastic part, allowing for demolding between the plastic part and the stationary template 2. After demolding, the first electric push rod 11 resets the blocking block 21, causing its end to re-insert into the air hole 17. The method allows for demolding of plastic parts after injection molding, using gas propulsion. Compared to traditional push rod demolding, this method reduces the probability of damage to the plastic parts and improves the injection molding quality. The demolded plastic parts fall into the discharge slot 3 through the slots on the operating table 1. Upon falling, the plastic parts contact the buffer frame 19. When subjected to the force generated by the plastic parts, the buffer frame 19 moves downward, causing the slider 16 to move within the slide groove 15. After moving, the spring 23 is compressed, and the spring 23 can buffer the impact force of the fall through deformation. The upper rolling rod 20 assists the plastic parts in sliding downward. This method allows the buffer frame 19 to cushion the falling plastic parts during demolding, reducing the risk of damage during demolding.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. The injection molding mechanism of an injection molding machine, including an operating table (1), characterized in that: A stationary template (2) is fixedly connected to the upper end of the operating table (1). A movable cylinder (10) is fixedly connected to one side of the stationary template (2). A connecting pipe (8) is fixedly connected to the upper end of the movable cylinder (10). An air supply pipe (9) is fixedly connected to the upper end of the connecting pipe (8). An air pump (13) is fixedly connected to one corner of the upper end of the operating table (1). The output end of the air pump (13) is fixedly connected to one end of the air supply pipe (9). A movable block (22) is fixedly connected inside the movable cylinder (10). A blocking block (21) is fixedly connected to one side of the movable block (22). A mounting bracket (12) is fixedly connected to one side of the static template (2). An electric push rod (11) is fixedly connected to the upper end of the mounting bracket (12). The output end of the electric push rod (11) is fixedly connected to one side of the movable block (22). A reinforcing rib (14) is fixedly connected to both sides of one side of the static template (2). An air hole (17) is opened in the middle of the static template (2). One end of the blocking block (21) is inserted into the air hole (17).

2. The injection mechanism of the injection molding machine according to claim 1, characterized in that: The lower end of the operating table (1) is fixedly connected to a feeding trough (3), and a buffer frame (19) is slidably connected inside the feeding trough (3).

3. The injection mechanism of the injection molding machine according to claim 2, characterized in that: The buffer frame (19) is fixedly connected to sliders (16) on both sides, and the feed trough (3) is provided with grooves (15) on both sides.

4. The injection mechanism of the injection molding machine according to claim 3, characterized in that: The outer surfaces of the two sliders (16) are slidably connected to the interior of the two grooves (15), and the lower end of the slider (16) is fixedly connected to a slide rod (24).

5. The injection mechanism of the injection molding machine according to claim 4, characterized in that: The outer surfaces of the two slide bars (24) are slidably connected to the two sides of the feeding groove (3), and the lower ends of the two sliders (16) are fixedly connected to springs (23).

6. The injection mechanism of the injection molding machine according to claim 5, characterized in that: The lower ends of the two springs (23) are fixedly connected to the two sides of the feeding groove (3), and the buffer frame (19) is uniformly connected to the rolling rod (20) inside.

7. The injection mechanism of the injection molding machine according to claim 1, characterized in that: The upper end of the operating table (1) is fixedly connected to a second electric push rod (7), and the output end of the second electric push rod (7) is fixedly connected to a moving template (5).

8. The injection mechanism of the injection molding machine according to claim 7, characterized in that: The static template (2) is fixedly connected with sliding rods (4) around its perimeter. The outer surfaces of the four sliding rods (4) are slidably connected to the perimeter of the moving template (5). The moving template (5) has an injection hole (6) in the middle and an injection tube (18) is fixedly connected to one side of the moving template (5).

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