Plastic injection molding machine

Abstract

The utility model relates to the technical field of plastic product processing, in particular to a plastic injection molding machine which comprises a bottom box and a box body, the box body is fixedly connected to the upper end of the bottom box, a demolding device is arranged in the bottom box, a knocking device is arranged on the left side of the upper end of the box body, and a heating device is fixedly connected to the left end of the box body. The upper end of the heating device fixedly communicates with a feeding hopper, and the inner wall of the upper end of the box body is fixedly connected with a first hydraulic cylinder. Through the cooperation of the knocking device and the demolding device, the feeding hopper is impacted through an impact rod, and plastic particles blocked at the bottom of the feeding hopper are loosened through vibration generated by impact and can smoothly fall into the heating device to be heated without manually knocking and dredging by an operator; and the plastic product adhered to the surface of the left mold is pushed to fall off through the sliding rod, so that the plastic product can be prevented from being adhered to the inner wall of the mold, the workload of operators is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic product processing, in particular to a plastic injection molding machine. Background Art

[0002] In the process of processing plastic products, most of them are formed by hot melt and blow molding. To spray the hot melt plastic raw materials, a plastic injection molding machine is needed.

[0003] For example, a plastic injection molding machine with the authorization announcement number "CN210139572U" has a telescopic cylinder that drives the pressure plate to move downward, and the plastic raw materials can fall through the symmetrically arranged feeding pipes, so that multiple plastic products can be processed at the same time, thereby improving the efficiency of plastic product processing. However, when filling, the device first pours the plastic particles into the feed hopper, and then enters the heater temple from the feed hopper for heating. The plastic is easy to accumulate at the bottom of the feed hopper, and the operator needs to manually knock and clear it. When the plastic is taken out of the mold, the plastic product is easy to stick to the inner wall of the mold, and the operator needs to manually take it out, which increases the workload of the operator and reduces the working efficiency of the device. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that when filling, plastic particles are first poured into the feed hopper and then enter the heater temple for heating, the plastic is easily accumulated at the bottom of the feed hopper, and the operator needs to knock it manually to clear it. When the plastic is formed and taken out through the mold, the plastic product is easily stuck to the inner wall of the mold, and the operator needs to manually take it out, which increases the operator's workload and reduces the working efficiency of the device. A plastic injection molding machine is proposed.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A plastic injection molding machine is designed, including a bottom box and a box body. The upper end of the bottom box is fixedly connected to the box body, a demoulding device is provided inside the bottom box, a knocking device is provided on the left side of the upper end of the box body, a heating device is fixedly connected to the left end of the box body, a feed hopper is fixedly connected to the upper end of the heating device, a first hydraulic cylinder is fixedly connected to the inner wall of the upper end of the box body, and a pressure plate is fixedly connected to the output end of the first hydraulic cylinder.

[0007] Preferably, the knocking device includes a first motor and a first shell, the lower end of the first shell is fixedly connected to the box body, the output shaft of the first motor is fixedly connected to an incomplete gear, the outer wall of the incomplete gear is engaged with the rack, the lower end of the rack is fixedly connected to a striker, the inner wall of the first shell is fixedly connected to a fixing rod, and the outer wall of the fixing rod is provided with a spring.

[0008] Preferably, the outer wall of the striker is slidably connected to the first shell, the two ends of the spring are fixedly connected to the first shell and the striker respectively, and the inner wall of the striker is slidably connected to the fixed rod.

[0009] Preferably, the bottom end of the box is fixedly connected to an extrusion tube, the outer wall of the extrusion tube fits with the mold on the left, the bottom of the mold on the left is fixedly connected to the bottom box, the inner wall of the right end of the bottom box is fixedly connected to a second hydraulic cylinder, and the output end of the second hydraulic cylinder is fixedly connected to the mold on the right.

[0010] Preferably, the demolding device includes a second motor and a second shell, the outer wall of the second shell is fixedly connected to the bottom box, the second motor is fixedly connected to the bottom box through a bracket, the output shaft of the second motor is fixedly connected to a worm, the outer wall of the worm is engaged with the worm wheel, the rotating shaft of the worm wheel is fixedly connected to a rotating rod, the upper end of the rotating rod is fixedly connected to a protrusion, and the outer wall of the protrusion is slidably connected to the sliding rod.

[0011] Preferably, both ends of the worm are rotatably connected to the second housing and the bottom box through bearings, the worm wheel rotating shaft is slidably connected to the second housing through bearings, the left end of the sliding rod is slidably connected to the second housing, and the right end of the sliding rod is slidably connected to the left mold.

[0012] The utility model proposes a plastic injection molding machine, which has the following beneficial effects: through the cooperation of the knocking device and the demoulding device, the output shaft of the first motor is started to rotate to drive the incomplete gear to rotate, and the rotation of the incomplete gear drives the rack and the striker rod to move to the right, and the striker rod compresses the spring. When the incomplete gear is no longer engaged with the rack, the striker rod is pushed to move quickly to return to its original position under the reaction force of the spring, and strikes the feed hopper. The impact of the striker rod on the feed hopper causes the vibration generated by the impact to loosen the plastic particles blocked at the bottom of the feed hopper, which can smoothly fall into the inside of the heating device for heating, and no longer requires the operator to manually knock and dredge them.

[0013] Start the output shaft of the second motor to rotate and drive the worm to rotate. Due to the characteristics of the worm and worm gear, the rotation of the worm drives the worm gear to rotate, and the rotation of the worm gear drives the rotating rod and the protrusion to move. The protrusion drives the sliding rod to move synchronously. The sliding rod pushes the plastic products stuck on the left surface of the mold to fall off, which can prevent the plastic products from sticking to the inner wall of the mold, reduce the workload of the operator, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 Front cross-sectional view of

[0016] Figure 3 for Figure 2 Part A of FIG;

[0017] Figure 4 for Figure 2 a side cross-sectional view of the middle striking device;

[0018] Figure 5 for Figure 2 FIG. 2 shows part B of FIG.

[0019] Figure 6 for Figure 2 Side sectional view of the demoulding device.

[0020] In the figure: 1. bottom box, 2. knocking device, 201. first motor, 202. first housing, 203. incomplete gear, 204. rack, 205. striker, 206. fixing rod, 207. spring, 3. demoulding device, 301. second motor, 302. second housing, 303. worm, 304. worm gear, 305. rotating rod, 306. bump, 307. slide bar, 4. box, 5. heating device, 6. feed hopper, 7. first hydraulic cylinder, 8. pressing plate, 9. extrusion tube, 10. second hydraulic cylinder, 11. mold DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Refer to the attached Figure 1-6 : In this embodiment, a plastic injection molding machine includes a bottom box 1 and a box body 4. The upper end of the bottom box 1 is fixedly connected to the box body 4. A demoulding device 3 is provided inside the bottom box 1. A knocking device 2 is provided on the left side of the upper end of the box body 4. A heating device 5 is fixedly connected to the left end of the box body 4. A heating plate is provided inside the heating device 5. The external power supply of the heating device 5 is turned on and the heating wire inside the heating plate is energized. The heat generated by the heating wire is transferred to the inside of the heating device 5 through the heating plate, and the heating device 5 can heat and melt the plastic, making the plastic a molten state. When the plastic flows into the box body 4, the heating device 5 can meet the working requirements according to actual requirements. The upper end of the heating device 5 is fixedly connected to a feed hopper 6. The inner wall of the upper end of the box body 4 is fixedly connected to a first hydraulic cylinder 7. The first hydraulic cylinder 7 can meet the working requirements according to actual requirements. The output end of the first hydraulic cylinder 7 is fixedly connected to a pressure plate 8. A baffle is processed on the left side of the pressure plate 8. The baffle can seal the connection between the heating device 5 and the box body 4.

[0023] The outer wall of the striker 205 is connected to the first shell 202 in a sliding manner, and the two ends of the spring 207 are fixedly connected to the first shell 202 and the striker 205 respectively. The inner wall of the striker 205 is connected to the fixed rod 206 in a sliding manner. The elastic coefficient of the spring 207 can be determined according to actual requirements to meet the working needs. The bottom end of the box body 4 is fixedly connected to the extrusion tube 9, and the outer wall of the extrusion tube 9 fits the mold 11 on the left. The bottom of the mold 11 on the left is fixedly connected to the bottom box 1, and the inner wall of the right end of the bottom box 1 is fixedly connected to the second hydraulic cylinder 10. The second hydraulic cylinder 10 can meet the working needs according to actual requirements. The output end of the second hydraulic cylinder 10 is fixedly connected to the right mold 11. The two ends of the worm 303 are rotatably connected to the second shell 302 and the bottom box 1 through bearings. The rotating shaft of the worm wheel 304 is slidingly connected to the second shell 302 through bearings. The left end of the slide rod 307 is slidably connected to the second shell 302. The right end of the slide rod 207 is slidably connected to the left mold 11. The right end of the slide rod 307 is sealed with the left mold 11 through rubber.

[0024] Refer to the attached Figure 1-4 : The knocking device 2 includes a first motor 201 and a first shell 202. The first motor 201 can meet the working requirements according to actual requirements. The lower end of the first shell 202 is fixedly connected to the box body 4. The output shaft of the first motor 201 is fixedly connected with an incomplete gear 203. The outer wall of the incomplete gear 203 is engaged with the rack 204. The rotation of the incomplete gear 203 drives the rack 204 to move. The lower end of the rack 204 is fixedly connected with a striker 205. The movement of the rack 204 drives the striker 205 to move synchronously. The end of the striker 205 is a rubber head. The inner wall of the first shell 202 is fixedly connected with a fixed rod 206, and the outer wall of the fixed rod 206 is provided with a spring 207.

[0025] Refer to the attached Figure 2 、 5 And 6: The demoulding device 3 includes a second motor 301 and a second shell 302. The second motor 301 can meet the working needs according to actual requirements. The outer wall of the second shell 302 is fixedly connected to the bottom box 1. The second motor 301 is fixedly connected to the bottom box 1 through a bracket. The output shaft of the second motor 301 is fixedly connected with a worm 303. The outer wall of the worm 303 is engaged with the worm wheel 304. The rotation of the worm 303 drives the worm wheel 304 to rotate. The rotation shaft of the worm wheel 304 is fixedly connected with a rotating rod 305. The rotation of the worm wheel 304 drives the rotating rod 305 to rotate. The upper end of the rotating rod 305 is fixedly connected with a protrusion 306. The movement of the rotating rod 305 drives the protrusion 306 to move. The outer wall of the protrusion 306 is slidably connected to the slide rod 307. The protrusion 306 moves inside the slide rod 307 while driving the slide rod 307 to move.

[0026] Working principle:

[0027] The operator pours the plastic granules into the heating device 5 through the feed hopper 6, turns on the external power supply of the heating device 5, and energizes the heating wire inside the heating plate. The heat generated by the heating wire is transferred to the inside of the heating device 5 through the heating plate. The heating device 5 can heat and melt the plastic, making the plastic into a molten state and then flowing into the inside of the box body 4. The telescopic end of the first hydraulic cylinder 7 is controlled to extend to drive the pressure plate 8 to move downward (a side baffle is processed on the left side of the upper end of the pressure plate 8, which can block the plastic from flowing into the through hole of the box body 4 when moving downward). The molten plastic inside the box body 4 is extruded through the extrusion tube 9 to the inside of the molds 11 on both sides for molding. After the plastic is injection-molded, the sliding door on the surface of the bottom box 1 is opened, and the telescopic end of the second hydraulic cylinder 10 is controlled to drive the right mold 11 to move away from the left mold 11, and the molded plastic can be taken out. The plastic injection molding process is consistent with the working principle of the authorization announcement number "CN210139572U".

[0028] The process of tapping the bottom of the feed hopper:

[0029] Since plastic particles tend to accumulate at the bottom of the feed hopper 6 during the material discharge process, the external power supply of the first motor 201 is connected, and the output shaft of the first motor 201 is started to rotate to drive the incomplete gear 203 to rotate. The rotation of the incomplete gear 203 drives the rack 204 and the striker 205 to move to the right, and the striker 205 compresses the spring 207. When the incomplete gear 203 is no longer engaged with the rack 204, the striker 205 is pushed to move quickly back to its original position under the reaction force of the spring 207, and strikes the feed hopper 6. The striker 205 strikes the feed hopper 6, and the vibration generated by the impact loosens the plastic particles blocked at the bottom of the feed hopper 6 and allows them to smoothly fall into the heating device 5 for heating, completing the knocking process on the bottom of the feed hopper.

[0030] Demolding process for plastic products:

[0031] Since plastic products are easily adhered to the inner wall of the left mold 11, the external power supply of the second motor 301 is turned on, and the output shaft of the second motor 301 is started to rotate to drive the worm 303 to rotate. Due to the characteristics of the worm and worm gear, the rotation of the worm 303 drives the worm gear 304 to rotate, and the rotation of the worm gear 304 drives the rotating rod 305 and the protrusion 306 to move. The protrusion 306 drives the slide bar 307 to move synchronously. The slide bar 307 pushes the plastic products adhered to the surface of the left mold 11 to fall off, and the operator can collect it to complete the demolding process of the plastic products.

[0032] Plastic injection molding can be achieved through a series of operations including knocking on the feed hopper, injection molding of the plastic and demoulding of the plastic product.

[0033] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A plastic injection molding machine, comprising a bottom box (1) and a box body (4), wherein the upper end of the bottom box (1) is fixedly connected to the box body (4), characterized in that: A demoulding device (3) is provided inside the bottom box (1), a knocking device (2) is provided on the left side of the upper end of the box body (4), a heating device (5) is fixedly connected to the left end of the box body (4), a feed hopper (6) is fixedly connected to the upper end of the heating device (5), a first hydraulic cylinder (7) is fixedly connected to the inner wall of the upper end of the box body (4), and a pressure plate (8) is fixedly connected to the output end of the first hydraulic cylinder (7).

2. A plastic injection molding machine according to claim 1, characterized in that: The knocking device (2) comprises a first motor (201) and a first housing (202); the lower end of the first housing (202) is fixedly connected to the box body (4); the output shaft of the first motor (201) is fixedly connected to an incomplete gear (203); the outer wall of the incomplete gear (203) is meshed with a rack (204); the lower end of the rack (204) is fixedly connected to a striker (205); the inner wall of the first housing (202) is fixedly connected to a fixed rod (206); and the outer wall of the fixed rod (206) is provided with a spring (207).

3. A plastic injection molding machine according to claim 2, characterized in that: The outer wall of the striker (205) is slidably connected to the first housing (202), the two ends of the spring (207) are fixedly connected to the first housing (202) and the striker (205), and the inner wall of the striker (205) is slidably connected to the fixed rod (206).

4. A plastic injection molding machine according to claim 1, characterized in that: The bottom end of the box body (4) is fixedly connected to an extrusion tube (9), the outer wall of the extrusion tube (9) is in contact with the mold (11) on the left side, the bottom of the mold (11) on the left side is fixedly connected to the bottom box (1), the inner wall of the right end of the bottom box (1) is fixedly connected to a second hydraulic cylinder (10), and the output end of the second hydraulic cylinder (10) is fixedly connected to the mold (11) on the right side.

5. The plastic injection molding machine according to claim 1, characterized in that: The demoulding device (3) comprises a second motor (301) and a second housing (302); the outer wall of the second housing (302) is fixedly connected to the bottom box (1); the second motor (301) is fixedly connected to the bottom box (1) via a bracket; the output shaft of the second motor (301) is fixedly connected to a worm (303); the outer wall of the worm (303) is meshed with a worm wheel (304); the rotating shaft of the worm wheel (304) is fixedly connected to a rotating rod (305); the upper end of the rotating rod (305) is fixedly connected to a protrusion (306); the outer wall of the protrusion (306) is slidably connected to a sliding rod (307).

6. A plastic injection molding machine according to claim 5, characterized in that: The two ends of the worm (303) are rotatably connected to the second housing (302) and the bottom box (1) through bearings, the rotating shaft of the worm wheel (304) is slidably connected to the second housing (302) through bearings, the left end of the sliding rod (307) is slidably connected to the second housing (302), and the right end of the sliding rod (307) is slidably connected to the left mold (11).

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