Plastic mold metal plate positioning structure

Abstract

The utility model discloses a plastic mould sheet metal positioning structure which comprises a machine base, an adsorption assembly and a dredging assembly, the top of the machine base is connected with a mould plate, the adsorption assembly is arranged in the mould plate and comprises a vacuum pump and a plurality of groups of adsorption cylinders, the vacuum pump is arranged in the machine base, and the plurality of groups of adsorption cylinders are all arranged in the top of the mould plate. A filter screen is arranged in the adsorption barrel, the dredging assembly comprises an electric cylinder, the electric cylinder is arranged in the mold plate, a piston rod of the electric cylinder is connected with a push plate, chippings blocked on the filter screen can be ejected out through the arranged dredging assembly, in actual production, various chippings can be generated in the plastic mold, and the chippings easily block the filter screen in a vacuum system, so that the plastic mold cannot be blocked easily. And the dredging assembly can timely clean the chippings blocking the filter screen, so that the normal air exhaust efficiency of the vacuum system is maintained, the vacuum degree is ensured to reach the standard required by normal adsorption of sheet metal parts, and the condition that the machine is frequently stopped to clean or replace the filter screen due to blockage of the filter screen is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of plastic mold technology, and specifically relates to a sheet metal positioning structure for plastic molds. Background Technology

[0002] A plastic mold is a device used to shape injection molded workpieces or to perform secondary injection molding on base materials. Plastic molds are widely used in industrial production due to their high production efficiency. In the production of sheet metal workpieces, the forming process usually requires secondary molding. First, the sheet metal sheet needs to be stamped in a stamping die to obtain a suitable contour shape. Then, the sheet metal sheet needs to be placed in the core of the plastic mold. The plastic mold then closes the mold at the sheet metal sheet and injects the plastic layer to form the plastic layer.

[0003] Currently, in the production process of plastic products, sheet metal parts need to be positioned within the mold using a vacuum adsorption positioning structure. This prevents the sheet metal from being unstable when placed in the cavity, which could cause it to wobble or shift during injection molding. This positioning method utilizes the suction force generated by vacuum to stably fix the sheet metal parts and can accommodate various complex shapes, facilitating the composite molding of plastics and sheet metal. However, in actual production scenarios, the working environment inside plastic molds is quite complex, generating various types of debris. These debris come from diverse sources, such as plastic particles that decompose due to high temperatures during the injection molding process; metal debris generated from the wear and tear of the mold itself over long-term use; and fine particles formed by residual mold release agent during demolding. Therefore, using vacuum adsorption to fix these debris is problematic. When fixing sheet metal parts, these debris are sucked into the vacuum system along with the airflow. In the vacuum system, the filter screen, as a key component for blocking debris, can play a certain filtering role, but it is very easy to be clogged by debris. Once the filter screen is clogged, the pumping efficiency of the vacuum system will drop significantly, causing the vacuum level to fail to meet the standard required for normal adsorption of sheet metal parts. This will not only greatly reduce the adsorption effect of sheet metal parts, resulting in weak adsorption and inaccurate positioning, but also affect the quality of the final plastic product, causing problems such as product size deviation and weak joints. In order to maintain the normal operation of the vacuum adsorption positioning structure, it is necessary to frequently stop the machine to clean or replace the filter screen. Frequent shutdowns not only greatly reduce production efficiency and increase production costs, but also affect the continuity of the entire production process. For large-scale industrial production, this impact is particularly serious. Utility Model Content

[0004] The purpose of this utility model is to provide a sheet metal positioning structure for plastic molds to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sheet metal positioning structure for plastic molds, comprising:

[0006] A base, the top of which is connected to a template;

[0007] An adsorption assembly is provided inside a template for adsorbing and fixing sheet metal parts. The adsorption assembly includes a vacuum pump and adsorption cylinders. The vacuum pump is located inside a base. Several sets of adsorption cylinders are provided, and all sets of adsorption cylinders are located inside the top of the template. The adsorption cylinders are provided with filters for intercepting debris during adsorption.

[0008] A cleaning component is provided inside a template to push out debris clogging the filter screen. The cleaning component includes an electric cylinder, which is located inside the template and has a piston rod connected to a push plate. The piston rod of the electric cylinder pushes the push plate to move, so that a number of cleaning needles evenly distributed on the top of the push plate are inserted into the filter screen holes and push out the debris.

[0009] Preferably, the top of the template is provided with a diversion pipe and a plurality of air extraction nozzles are evenly distributed on the top of the diversion pipe, and one end of the top of the air extraction nozzles extends into the air extraction chamber provided inside the template.

[0010] Preferably, the vacuum pump has an air inlet end connected to an air extraction pipe and the other end of the air extraction pipe connected to a distributor pipe, and the vacuum pump has an air outlet end connected to an exhaust pipe and the other end of the exhaust pipe extends outside the base.

[0011] Preferably, both ends of the template are provided with grooves and sliding rods are connected inside the grooves.

[0012] Preferably, the push plate is disposed in the air extraction chamber and both ends of the push plate are slidably sleeved on the slide rod by sliders.

[0013] Preferably, a spring is fitted onto the slide rod, and the two ends of the spring are respectively connected to the template and the slider.

[0014] Preferably, the top of the push plate is connected to several connecting rods and the top of the connecting rods is connected to a disc, and several unclogging needles are evenly distributed on the top of the disc.

[0015] Preferably, a ventilation plate is provided inside the base and on the side of the vacuum pump.

[0016] Preferably, a rubber ring is connected to the top of the adsorption cylinder.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) By setting up an adsorption component, the vacuum adsorption force generated by the vacuum pump and adsorption cylinder is used to adsorb and fix the sheet metal parts. This adsorption method can better adapt to various complex shapes of sheet metal parts, ensure that the sheet metal parts are placed firmly in the mold, effectively avoid product quality problems caused by the shaking and displacement of sheet metal parts during the injection molding process, and thus improve the quality of the final plastic product.

[0019] (2) The cleaning components can push out the debris that clogs the filter screen. In actual production, various debris will be generated inside the plastic mold. These debris can easily clog the filter screen in the vacuum system, resulting in a decrease in pumping efficiency. The cleaning components can clean the debris that clogs the filter screen in time, maintain the normal pumping efficiency of the vacuum system, and ensure that the vacuum degree reaches the standard required for normal adsorption of sheet metal parts. This avoids the situation of frequent machine shutdown for cleaning or replacement of the filter screen due to filter screen clogging.

[0020] (3) A diversion pipe and an air extraction nozzle are set at the top of the template to make the air extraction more uniform and improve the adsorption effect. The top of the adsorption cylinder is connected to a rubber ring, which can enhance the sealing between the adsorption cylinder and the sheet metal parts and improve the adsorption effect. Slide rods are set at both ends of the template. The push plate slides on the slide rods through the slider, which ensures the stability of the push plate movement and allows the unblocking needle to be accurately inserted into the filter mesh to clean the debris. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the unblocking needle of this utility model in its initial position when the equipment is working;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention for unclogging a filter screen;

[0024] Figure 4 This is a schematic diagram of the structure of the unclogging needle of this utility model inserted into the filter mesh.

[0025] In the diagram: 1. Base; 2. Template; 3. Vacuum pump; 4. Adsorption cylinder; 5. Filter screen; 6. Electric cylinder; 7. Push plate; 8. Unblocking needle; 9. Filter screen holes; 10. Diverter pipe; 11. Suction nozzle; 12. Suction chamber; 13. Suction pipe; 14. Exhaust pipe; 15. Slide rod; 16. Slider; 17. Spring; 18. Connecting rod; 19. Disc; 20. Ventilation plate; 21. Rubber ring; 22. Handle; 23. Bolt. Detailed Implementation

[0026] 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.

[0027] This utility model provides, for example Figure 1-4 The sheet metal positioning structure for a plastic mold shown includes:

[0028] Machine base 1, with a template 2 connected to its top;

[0029] An adsorption assembly is installed inside the template 2 and is used to adsorb and fix sheet metal parts. The adsorption assembly includes a vacuum pump 3 and an adsorption cylinder 4. The vacuum pump 3 is installed inside the base 1. Several sets of adsorption cylinders 4 are provided, and all sets of adsorption cylinders 4 are located inside the top of the template 2. The adsorption cylinder 4 is provided with a filter screen 5 for intercepting debris during adsorption. The two ends of the filter screen 5 are screwed and fixed inside the adsorption cylinder 4 by bolts 23. When the equipment needs to be stopped for maintenance in the later stage, the bolts 23 can be loosened and the filter screen 5 can be removed from the adsorption cylinder 4 by the handle 22 connected to the top of the filter screen 5. The filter screen 5 can be replaced or cleaned after long-term use.

[0030] The unblocking component is located inside the template 2 and is used to push out the debris blocking the filter screen 5. The unblocking component includes an electric cylinder 6, which is located inside the template 2 and the piston rod of the electric cylinder 6 is connected to a push plate 7. The piston rod of the electric cylinder 6 pushes the push plate 7 to move, so that a plurality of unblocking needles 8 evenly distributed on the top of the push plate 7 are inserted into the filter screen holes 9 inside the filter screen 5 and push out the debris.

[0031] The top of the template 2 is provided with a diversion pipe 10 and a number of suction nozzles 11 are evenly distributed on the top of the diversion pipe 10. One end of the top of the suction nozzle 11 extends into the suction chamber 12 provided in the template 2.

[0032] The vacuum pump 3 has an air inlet end connected to an air extraction pipe 13, and the other end of the air extraction pipe 13 is connected to a distribution pipe 10. The vacuum pump 3 has an exhaust pipe 14 connected to an exhaust end, and the other end of the exhaust pipe 14 extends to the outside of the base 1. After the vacuum pump 3 is started, the air in the distribution pipe 10 is extracted through the air extraction pipe 13. Since the distribution pipe 10 is connected to the air extraction chamber 12 through the air extraction nozzle 11, and the adsorption cylinder 4 is connected to the air extraction chamber 12, the air in the adsorption cylinder 4 will pass through the air extraction chamber 12, the air extraction nozzle 11, the distribution pipe 10 and the air extraction pipe 13 in sequence, and finally be discharged by the vacuum pump 3. This process creates a negative pressure in the adsorption cylinder 4, thereby achieving the adsorption and fixation of the sheet metal parts.

[0033] Both ends of the template 2 are provided with sliding grooves and sliding rods 15 are connected in the sliding grooves. The push plate 7 is located in the air extraction chamber 12 and both ends of the push plate 7 are slidably sleeved on the sliding rods 15 through sliders 16. The sliding structure composed of the sliding rods 15 and the sliders 16 provides precise guidance for the push plate 7. When the electric cylinder 6 pushes the push plate 7 to move, the sliders 16 slide along the sliding rods 15 to ensure that the push plate 7 can only move in a fixed straight line direction. This allows the unblocking needles 8 evenly distributed on the top of the push plate 7 to be accurately inserted into the filter mesh holes 9 of the filter screen 5.

[0034] A spring 17 is fitted onto the slide bar 15, and the two ends of the spring 17 are connected to the template 2 and the slider 16, respectively.

[0035] The top of the push plate 7 is connected to several connecting rods 18 and the top of the connecting rods 18 is connected to a disc 19, and several unblocking needles 8 are evenly distributed on the top of the disc 19.

[0036] A ventilation plate 20 is provided inside the base 1 and on one side of the vacuum pump 3. The vacuum pump 3 will generate a certain amount of heat during continuous operation. The ventilation plate 20 can promote air circulation inside the base 1, so that the outside air can flow more smoothly to the vacuum pump 3 and take away the heat generated by it, ensuring that the vacuum pump 3 works stably within a suitable temperature range.

[0037] The top of the adsorption cylinder 4 is connected to a rubber ring 21. When adsorbing sheet metal parts, the rubber ring 21 can fill the tiny gaps between the adsorption cylinder 4 and the sheet metal parts. Because rubber has good elasticity, it can fit tightly against the surface of the sheet metal parts, making the adsorption force of the adsorption cylinder 4 stronger and ensuring that the sheet metal parts are firmly adsorbed.

[0038] When the device is started by the controller on the base 1, the vacuum pump 3 inside the base 1 starts to work. The air inlet of the vacuum pump 3 is connected to the distribution pipe 10 on the top of the template 2 through the air extraction pipe 13. When the vacuum pump 3 is running, it will extract the air in the distribution pipe 10, thereby reducing the air pressure in the distribution pipe 10. Since several air extraction nozzles 11 evenly distributed on the top of the distribution pipe 10 are connected to the air extraction chamber 12, and the adsorption cylinder 4 is connected to the air extraction chamber 12, the air pressure inside the adsorption cylinder 4 decreases as the air pressure in the distribution pipe 10 decreases, thereby creating a negative pressure environment inside the adsorption cylinder 4.

[0039] Then, when the sheet metal part is placed on the top of the adsorption cylinder 4 of the template 2, the external air pressure is greater than the air pressure inside the adsorption cylinder 4. Under the action of the air pressure difference, the sheet metal part will be tightly adsorbed on the adsorption cylinder 4. In addition, the rubber ring 21 connected to the top of the adsorption cylinder 4 can enhance the sealing between the sheet metal part and the adsorption effect, further improving the adsorption effect and ensuring that the sheet metal part will not shake or shift during the injection molding process, thus achieving precise positioning. During this process, the debris that enters the adsorption cylinder 4 from the outside with the airflow will be intercepted by the filter screen 5 set inside the adsorption cylinder 4, preventing it from entering the vacuum system and causing damage to components such as the vacuum pump 3.

[0040] As production continues, the amount of debris trapped on filter 5 gradually increases, which may cause filter 5 to become clogged, affecting the vacuum adsorption effect. At this time, (such as...) Figure 3 (As shown) The controller on the base 1 starts the electric cylinder 6 inside the template 2. After receiving the command, the electric cylinder 6 starts working, and the piston rod of the electric cylinder 6 extends, pushing the push plate 7 to move in the suction chamber 12. The two ends of the push plate 7 are slidably connected to the slide rods 15 in the slide grooves at both ends of the template 2 through the sliders 16. The slide rods 15 provide a stable guide for the movement of the push plate 7, ensuring that the push plate 7 can move up and down smoothly. Several connecting rods 18 connected to the top of the push plate 7 will rise synchronously with the rise of the push plate 7. The disc 19 connected to the top of the connecting rods 18 will also be driven to rise. The unblocking needles 8 evenly distributed on the top of the disc 19 rise with the disc 19. The unblocking needle 8 is accurately inserted into the filter mesh 9 within the filter screen 5. Because the diameter of the unblocking needle 8 is smaller than that of the filter mesh 9 and it has a certain rigidity, it can push out the debris blocking the filter mesh 9, restoring the filter mesh 9 to its unobstructed state. A displacement sensor (not shown in the attached diagram) is installed on the piston rod of the electric cylinder 6 to monitor the extension length of the piston rod in real time, thereby indirectly determining the position of the unblocking needle 8. When the displacement sensor detects that the extension length of the piston rod has reached the set safe insertion depth, it will send a signal to the controller of the electric cylinder 6. After receiving the signal, the controller will immediately control the electric cylinder 6 to stop operating, preventing the unblocking needle 8 from being excessively inserted into the filter screen 5.

[0041] Once the debris has been cleaned up (e.g.) Figure 2 As shown, the piston rod of the electric cylinder 6 retracts, and the push plate 7 begins to descend and reset to its initial position under the drive of the piston rod. During the descent of the push plate 7, its two ends slide on the slide rod 15 to enhance the stability of the push plate 7's movement. Through this cycle, the filter screen 5 is automatically cleaned, the normal operation of the vacuum adsorption system is maintained, and the stable operation of the equipment is ensured.

[0042] 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. A sheet metal positioning structure for a plastic mold, characterized in that, include: A base (1), the top of which is connected to a template (2); The adsorption assembly is located inside the template (2) and is used to adsorb and fix the sheet metal parts. The adsorption assembly includes a vacuum pump (3) and an adsorption cylinder (4). The vacuum pump (3) is located inside the base (1). The adsorption cylinder (4) is provided in several groups and all groups of adsorption cylinders (4) are located inside the top of the template (2). The adsorption cylinder (4) is provided with a filter screen (5) for intercepting the adsorbed debris. The unblocking component is located inside the template (2) and is used to push out the debris blocked in the filter screen (5). The unblocking component includes an electric cylinder (6), which is located inside the template (2) and the piston rod of the electric cylinder (6) is connected to a push plate (7). The piston rod of the electric cylinder (6) pushes the push plate (7) to move so that a number of unblocking needles (8) evenly distributed on the top of the push plate (7) are inserted into the filter screen holes (9) in the filter screen (5) and push out the debris.

2. The sheet metal positioning structure for a plastic mold according to claim 1, characterized in that: The template (2) is provided with a diversion pipe (10) at the top and a number of suction nozzles (11) are evenly distributed at the top of the diversion pipe (10). One end of the suction nozzle (11) extends into the suction chamber (12) provided in the template (2).

3. The sheet metal positioning structure for a plastic mold according to claim 2, characterized in that: The vacuum pump (3) has an air inlet end connected to an air extraction pipe (13) and the other end of the air extraction pipe (13) is connected to a split pipe (10). The vacuum pump (3) has an exhaust pipe (14) connected to an exhaust end and the other end of the exhaust pipe (14) extends to the outside of the base (1).

4. The sheet metal positioning structure for a plastic mold according to claim 1, characterized in that: Both ends of the template (2) are provided with grooves and slide rods (15) are connected in the grooves.

5. The sheet metal positioning structure for a plastic mold according to claim 4, characterized in that: The push plate (7) is located in the air extraction chamber (12) and both ends of the push plate (7) are slidably connected to the slide rod (15) by the slider (16).

6. The sheet metal positioning structure for a plastic mold according to claim 5, characterized in that: A spring (17) is fitted on the slide bar (15), and the two ends of the spring (17) are connected to the template (2) and the slider (16) respectively.

7. The sheet metal positioning structure for a plastic mold according to claim 1, characterized in that: The push plate (7) is connected to a number of connecting rods (18) at the top and a disc (19) is connected to the top of the connecting rods (18). A number of unblocking needles (8) are evenly distributed on the top of the disc (19).

8. The sheet metal positioning structure for a plastic mold according to claim 1, characterized in that: A ventilation plate (20) is provided inside the base (1) and on the side of the vacuum pump (3).

9. The sheet metal positioning structure for a plastic mold according to claim 1, characterized in that: A rubber ring (21) is connected to the top of the adsorption cylinder (4).

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