Positioning mechanism of plastic forming machine

Abstract

The utility model discloses a plastic forming machine positioning mechanism which comprises a workbench, two ends of the upper surface of the workbench are symmetrically and fixedly connected with racks, the opposite sides of the two racks are both provided with blanking guide assemblies, the inner sides of the two blanking guide assemblies are both fixedly connected with connecting rods, and the connecting rods are fixedly connected with two ends of the workbench. The opposite sides of the two connecting rods are jointly and fixedly connected with a discharging hopper, a collecting box is placed in the center of the upper surface of the workbench, and a positioning assembly matched with the collecting box is installed on the upper surface of the workbench. According to the blanking device, by means of the blanking guide assembly, products formed and falling between the male die and the female die can fall into the blanking hopper and then fall into the collecting box, meanwhile, the cam rotates to periodically push the abutting and pushing plate in a reciprocating mode, so that the blanking hopper shakes back and forth in a small range, the products cannot be clamped on the inner wall of the blanking hopper, and the production efficiency is improved. And the water can also uniformly fall into all positions of the collecting box, so that the device is relatively practical.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molding machines, in particular to a positioning mechanism for a plastic molding machine. Background Art

[0002] Plastic molding processing equipment is developed on the basis of rubber machinery and metal die-casting machines. The working principle of plastic injection molding machines is similar to that of syringes used for injections. It uses the thrust of the screw (or plunger) to inject the plasticized molten state (i.e. viscous flow state) plastic into the closed mold cavity, and obtains the product after solidification and finalization. Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding, melt plasticization, pressure injection, mold filling and cooling, mold opening and taking out the plastic parts, and then closing the mold again after taking out the plastic parts for the next cycle.

[0003] When the existing plastic molding machine is in use, after the product is formed, it will be ejected from the mold by the ejector and then fall into the collecting parts for collection. The products are easily scattered on the workbench, which is inconvenient for unified collection. In addition, there is generally no fixing structure for the collecting parts above the workbench, or the collecting parts are directly positioned on the table by bolts, which is difficult to disassemble and replace according to the size of different products. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a positioning mechanism for a plastic molding machine.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a positioning mechanism for a plastic molding machine, comprising a workbench, wherein both ends of the upper surface of the workbench are symmetrically fixedly connected to a frame, and opposite sides of the two frames are respectively installed with a blanking guide assembly, and the inner sides of the two blanking guide assemblies are respectively fixedly connected to a connecting rod, and the opposite sides of the two connecting rods are commonly fixedly connected to a blanking hopper, a collection box is placed at the center position of the upper surface of the workbench, and a positioning assembly matching the collection box is installed on the upper surface of the workbench.

[0006] Furthermore, the blanking guide assembly includes a fixed plate fixedly connected to the inner side of the frame and a slide plate slidably connected to the inner side of the frame, the fixed plate and the slide plate are symmetrically fixedly connected with springs on opposite sides, and one side of the outer surface of the fixed plate is symmetrically fixedly connected with a guide rod, the two springs are respectively slidably connected to the outer surfaces of the corresponding guide rods, and the slide plate is slidably connected to the outer surfaces of the two guide rods, the inner side of the slide plate is fixedly connected to the connecting rod, and the side of the slide plate away from the fixed plate is fixedly connected with a push plate, and one side of the outer surface of the push plate is abutted against a cam.

[0007] Furthermore, the positioning assembly includes a fixed seat symmetrically fixedly connected to the upper surface of the workbench, and the opposite sides of the two fixed seats are jointly rotatably connected with a bidirectional screw, the outer surface of the bidirectional screw is symmetrically sleeved with a push plate threadedly connected, one end of the two push plates is fixedly connected with a clamping plate, the lower surfaces of the two clamping plates are slidably connected to the upper surface of the workbench, and the inner sides of the two clamping plates are abutted against the outer surface of the collection box.

[0008] Furthermore, one end of the bidirectional screw extends through and to the outside of a single fixing seat and is threadedly sleeved with a knob, and the other end of the bidirectional screw extends through and to the outside of a single fixing seat and is fixedly connected with a rotating plate.

[0009] Furthermore, a servo motor is fixedly mounted on one side of the outer surface of the frame, and an output shaft of the servo motor extends through the inner side of the frame and is connected to one side of the outer surface of the cam.

[0010] Furthermore, electric push rods are symmetrically fixedly installed on the inner sides of the two frames, a male mold is commonly fixedly installed on the output ends of the two electric push rods on the inner side of a single frame, and a female mold is commonly fixedly installed on the output ends of the two electric push rods on the inner side of the other frame.

[0011] Furthermore, a rubber pad is fixedly connected to the inner side of the clamping plate.

[0012] The utility model has the following beneficial effects:

[0013] 1. When the utility model is in use, the positioning mechanism of the plastic molding machine, through the provided drop guide assembly, the product formed and dropped between the punch and the die will fall into the drop hopper, and then fall into the interior of the collection box through the guidance of the bottom of the drop hopper. At the same time, the rotation of the cam will reciprocate and periodically push the push plate, so that the slide plate slides back and forth along the frame, and then drives the drop hopper to swing back and forth slightly, which can prevent the product from getting stuck on the inner wall of the drop hopper and make the product fall into various places of the collection box more evenly, and will not only accumulate in the middle, which is more practical.

[0014] 2. When the utility model is in use, the positioning mechanism of the plastic molding machine, through the provided positioning assembly, the collection box is directly placed on the upper surface of the workbench and fixed by clamping, so as to facilitate the removal and installation of the collection box, which is relatively simple. Moreover, when the rotating plate is rotated, the rotating plate can drive the bidirectional screw to rotate, thereby driving the two push plates to move toward or away from each other, so that the two clamping plates can adapt to the clamping of collection boxes of different sizes, and the adjustable operation makes it more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the connection between the collection box and the workbench of the utility model;

[0017] Figure 3 It is a side view of the blanking guide assembly and the frame of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of the positioning component of the utility model.

[0019] Legend:

[0020] 1. Workbench; 2. Frame; 3. Electric push rod; 4. Punch; 5. Die; 6. Drop hopper; 7. Connecting rod; 8. Slide plate; 9. Cam; 10. Push plate; 11. Fixed plate; 12. Guide rod; 13. Spring; 14. Collecting box; 15. Clamping plate; 16. Push plate; 17. Fixed seat; 18. Rotating plate; 19. Bidirectional screw; 20. Knob. DETAILED DESCRIPTION

[0021] Figures 1 to 4 As shown, it relates to a positioning mechanism for a plastic molding machine, including a workbench 1, with frames 2 symmetrically fixedly connected to both ends of the upper surface of the workbench 1, blanking guide assemblies are installed on opposite sides of the two frames 2, connecting rods 7 are fixedly connected to the inner sides of the two blanking guide assemblies, and a blanking hopper 6 is commonly fixedly connected to the opposite sides of the two connecting rods 7, a collecting box 14 is placed at the center of the upper surface of the workbench 1, and a positioning assembly matching the collecting box 14 is installed on the upper surface of the workbench 1.

[0022] Among them, electric push rods 3 are symmetrically fixedly installed on the inner sides of the two frames 2, and a punch 4 is fixedly installed on the output ends of the two electric push rods 3 on the inner side of a single frame 2, and a die 5 is fixedly installed on the output ends of the two electric push rods 3 on the inner side of the other frame 2, wherein the punch 4 and the die 5 match, and a heating and cooling system and injection molding and demolding components commonly used in the field of plastic molding machines are fixedly installed inside the frame 2, and the above are all well-known mature technologies and will not be elaborated here.

[0023] The blanking guide assembly includes a fixed plate 11 respectively fixedly connected to the inner side of the frame 2 and a slide plate 8 slidably connected to the inner side of the frame 2. The fixed plate 11 and the opposite side of the slide plate 8 are symmetrically fixedly connected with springs 13. One side of the outer surface of the fixed plate 11 is symmetrically fixedly connected with a guide rod 12. The two springs 13 are respectively sleeved and slidably connected to the outer surfaces of the corresponding guide rods 12, and the slide plate 8 is sleeved and slidably connected to the outer surfaces of the two guide rods 12. The inner side of the slide plate 8 is fixedly connected to the connecting rod 7. The side of the slide plate 8 away from the fixed plate 11 is fixedly connected with a push plate 10. One side of the outer surface of the push plate 10 is abutted with a cam 9. Correspondingly, a servo motor is fixedly installed on one side of the outer surface of the frame 2. The servo motor The output shaft of the motor extends through the inner side of the frame 2 and is connected to one side of the outer surface of the cam 9. When the servo motor is running, the cam 9 will rotate accordingly, and then its protruding position will periodically push the push plate 10. When it pushes the push plate 10 and then drives the slide plate 8 to approach the fixed plate 11 along the inner side of the frame 2, the slide plate 8 will compress the two springs 13. When the protruding position of the cam 9 no longer contacts the push plate 10, under the rebound force of the two springs 13 to restore the initial state, the slide plate 8 will slide in the direction away from the fixed plate 11 and restore its initial position. Within one rotation cycle of the cam 9, the drop hopper 6 will follow the reciprocating sliding of the slide plate 8 to achieve back and forth rocking.

[0024] Among them, the area of ​​the top of the drop hopper 6 should be larger than the connection area of ​​the punch 4 and the die 5, and the opening size of the top of the collecting box 14 should be larger than the cross-sectional size of the bottom of the drop hopper 6 to prevent the drop hopper 6 from shaking and missing the fallen molded products. After the demolded product falls into the inside of the drop hopper 6, it will enter the collecting box 14 below through the drop hopper 6.

[0025] The positioning assembly includes a fixing seat 17 symmetrically fixedly connected to the upper surface of the workbench 1, and the opposite sides of the two fixing seats 17 are rotatably connected with a bidirectional screw 19, and the outer surface of the bidirectional screw 19 is symmetrically sleeved with a push plate 16 connected by a thread, and one end of the two push plates 16 is fixedly connected with a clamping plate 15, and the lower surfaces of the two clamping plates 15 are slidably connected to the upper surface of the workbench 1, and the inner sides of the two clamping plates 15 are abutted against the outer surface of the collection box 14, wherein the inner side of the clamping plate 15 is fixedly connected with a rubber pad, and the rubber pad can increase friction to assist the two clamping plates 15 to clamp the collection box 14, and the sliding connection between the clamping plate 15 and the upper surface of the workbench 1 constitutes a limiting guide for the push plate 16, so that the push plate 16 will not rotate with the rotation of the bidirectional screw 19, and will only make a lateral horizontal displacement.

[0026] Correspondingly, one end of the bidirectional screw 19 extends through the outside of the single fixed seat 17 and is threadedly connected to a knob 20, and the other end of the bidirectional screw 19 extends through the outside of the single fixed seat 17 and is fixedly connected to a rotating plate 18. When the rotating plate 18 is rotated, the rotating plate 18 will drive the rotation of the bidirectional screw 19, and then drive the two push plates 16 to move toward each other, so that the clamping plate 15 slides along the workbench 1 to clamp the collection box 14.

[0027] When the positioning mechanism of the plastic molding machine is used, the products formed and dropped between the punch 4 and the die 5 will fall into the drop hopper 6, and then fall into the interior of the collection box 14 through the guidance at the bottom of the drop hopper 6. At the same time, the rotation of the cam 9 will also reciprocate and periodically push the push plate 10, so that the slide plate 8 slides back and forth along the frame 2, thereby driving the drop hopper 6 to swing back and forth slightly, which can not only prevent the products from being stuck on the inner wall of the drop hopper 6, but also make the products fall into various parts of the collection box 14 more evenly, and will not only accumulate in the middle, but also be more practical. Among them, the collection box 14 is directly placed on the upper surface of the workbench 1 and fixed by clamping, so as to facilitate the removal and installation of the collection box 14, which is relatively simple. Moreover, when the rotating plate 18 is rotated, the rotating plate 18 can drive the bidirectional screw 19 to rotate, thereby driving the two push plates 16 to move toward or away from each other, so that the two clamping plates 15 can adapt to the collection boxes 14 of different sizes for clamping, and the adjustable operation makes it more flexible.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning mechanism for a plastic molding machine, comprising a workbench (1), characterized in that: The two ends of the upper surface of the workbench (1) are symmetrically fixedly connected to the frames (2), the opposite sides of the two frames (2) are each installed with a material drop guide assembly, the inner sides of the two material drop guide assemblies are each fixedly connected with a connecting rod (7), the opposite sides of the two connecting rods (7) are commonly fixedly connected with a material drop hopper (6), a collection box (14) is placed at the center of the upper surface of the workbench (1), and a positioning assembly that matches the collection box (14) is installed on the upper surface of the workbench (1).

2. A positioning mechanism for a plastic molding machine according to claim 1, characterized in that: The blanking guide assembly comprises a fixed plate (11) respectively fixedly connected to the inner side of the frame (2) and a slide plate (8) slidably connected to the inner side of the frame (2); springs (13) are symmetrically fixedly connected to the opposite sides of the fixed plate (11) and the slide plate (8); a guide rod (12) is symmetrically fixedly connected to one side of the outer surface of the fixed plate (11); two springs (13) are respectively sleeved and slidably connected to the outer surfaces of corresponding guide rods (12); and the slide plate (8) is sleeved and slidably connected to the outer surfaces of the two guide rods (12); the inner side of the slide plate (8) is fixedly connected to the connecting rod (7); a push plate (10) is fixedly connected to the side of the slide plate (8) away from the fixed plate (11); and a cam (9) is abutted on one side of the outer surface of the push plate (10).

3. A positioning mechanism for a plastic molding machine according to claim 1, characterized in that: The positioning assembly comprises a fixing seat (17) symmetrically fixedly connected to the upper surface of the workbench (1), and opposite sides of the two fixing seats (17) are rotatably connected with a bidirectional screw (19), and the outer surface of the bidirectional screw (19) is symmetrically sleeved with a push plate (16) threadedly connected, and one end of the two push plates (16) is fixedly connected with a clamping plate (15), and the lower surfaces of the two clamping plates (15) are slidably connected to the upper surface of the workbench (1), and the inner sides of the two clamping plates (15) are in contact with the outer surface of the collection box (14).

4. A positioning mechanism for a plastic molding machine according to claim 3, characterized in that: One end of the bidirectional screw (19) extends through the outside of a single fixed seat (17) and is sleeved with a threaded knob (20), and the other end of the bidirectional screw (19) extends through the outside of a single fixed seat (17) and is fixedly connected to a rotating plate (18).

5. A positioning mechanism for a plastic molding machine according to claim 2, characterized in that: A servo motor is fixedly mounted on one side of the outer surface of the frame (2), and an output shaft of the servo motor extends through the inner side of the frame (2) and is connected to one side of the outer surface of the cam (9).

6. A positioning mechanism for a plastic molding machine according to claim 1, characterized in that: Electric push rods (3) are symmetrically fixedly installed on the inner sides of the two frames (2); a male mold (4) is fixedly installed on the output ends of the two electric push rods (3) on the inner side of a single frame (2); and a female mold (5) is fixedly installed on the output ends of the two electric push rods (3) on the inner side of another frame (2).

7. A positioning mechanism for a plastic molding machine according to claim 3, characterized in that: A rubber pad is fixedly connected to the inner side of the clamping plate (15).

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