An injection molding machine stripper

Abstract

This application discloses an injection molding machine unloading device, belonging to the technical field of injection molding equipment. It includes a hopper, a feeding pipe, and an unloading pipe connected in a "Y"-shaped configuration. A stirring paddle is rotatably disposed inside the hopper, and a drive shaft is also rotatably connected inside the hopper. Multiple baffles are distributed annularly on the drive shaft. The stirring paddle includes a stirring shaft, which is arranged parallel to the drive shaft. A drive mechanism is connected between the stirring shaft and the drive shaft, achieving quantitative feeding while ensuring normal switching between feeding and unloading.

Description

Technical Field

[0001] This application relates to the field of injection molding equipment technology, and more specifically, to an injection molding machine unloading device. 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. They are divided into vertical, horizontal, and all-electric types. They can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. In injection molding machines operate continuously. To ensure sufficient material supply, material is typically added to the hopper first and then slowly fed into the machine. When changing materials, residual material needs to be used up or discharged. Using up the material not only wastes resources but also delays production. Therefore, the common method is to remove residual material from the top of the hopper. However, this method cannot completely clean up the residual material and also delays production. Patent CN210758850U discloses an injection molding machine unloading device. While this device solves the problem of cleaning up excess injection molding material, it still has shortcomings. First, when unloading is needed, pulling the first sliding rope raises the first baffle to block the feeding channel, thus stopping feeding. The second sliding rope then opens the second baffle for unloading. Adjusting the baffle by pulling the sliding rope is cumbersome and difficult to control manually. Second, after long-term use, the sliding rope may wear and break, resulting in poor equipment stability.

[0003] The prior art publication CN 220242229 U provides an injection molding machine unloading device. This device uses the rotation of a motor to drive the output end drive gear to rotate. The drive gear meshes with the driven gear, which in turn rotates and drives the baffle on the rotating shaft to rotate. When the baffle rotates counterclockwise, the feeding channel opens, and when the baffle rotates clockwise, the unloading channel opens. The switching between unloading and feeding can be completed simply by rotating the baffle. It is easy to operate and control.

[0004] Although the existing technical solutions described above can achieve the relevant beneficial effects through the existing technical structure, they still have the following defects: When the device is in use, when the baffle blocks the unloading channel and guides the material to the feeding channel, and when a large amount of material accumulates in the feeding channel, the accumulated material will interfere with the rotation of the baffle when the baffle is rotated clockwise, which may cause the baffle to be unable to rotate. In addition, the device cannot feed material quantitatively when in use, which makes it easy to cause material accumulation during feeding.

[0005] In view of this, we propose an injection molding machine unloading device. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] The purpose of this application is to provide an injection molding machine unloading device that solves the technical problems in the background art mentioned above, and achieves the technical effect of quantitative feeding while ensuring normal feeding or unloading switching.

[0008] 2. Technical Solution

[0009] This application provides an injection molding machine unloading device, including a hopper, a feeding pipe, and an unloading pipe connected in a "Y" shape. A stirring paddle is rotatably arranged inside the hopper, and a drive shaft is also rotatably connected inside the hopper. Multiple baffles are distributed in a ring around the drive shaft. The stirring paddle includes a stirring shaft, which is arranged parallel to the drive shaft. A drive mechanism is connected between the stirring shaft and the drive shaft.

[0010] By adopting the above technical solution, when the drive mechanism drives the transmission shaft to rotate counterclockwise, a V-shaped storage bin is formed between every two partitions. Through scraping against the inner wall of the hopper, the material in each storage bin is quantitative. Then, the drive mechanism drives the storage bin to rotate counterclockwise, and the material falls into the feeding pipe. When it is necessary to discharge excess material in the hopper, the drive mechanism drives the transmission shaft to rotate clockwise, and the material in the storage bin is discharged through the discharge pipe. At the same time, during the feeding and discharging process, the drive mechanism can also drive the stirring paddle to stir the material in the hopper to avoid material clumping and also to unclog the hopper and prevent material accumulation.

[0011] As an optional solution to the technical solution of this application, the driving mechanism includes a motor, a synchronous pulley, and a synchronous belt fixed to the side wall of the hopper. The motor is connected to the transmission shaft, and the synchronous pulley is coaxially fixed to both the transmission shaft and the stirring shaft. The two synchronous pulleys are connected to the synchronous belt.

[0012] By adopting the above technical solution, the transmission shaft is driven to rotate by a motor. Under the transmission of two synchronous pulleys and a synchronous belt, the transmission shaft and the stirring shaft rotate synchronously. The clockwise or counterclockwise rotation of the transmission shaft is achieved by the forward and reverse rotation of the motor.

[0013] As an optional solution to the technical solution of this application, the output shaft of the motor is coaxially fixed with the worm gear, and the transmission shaft is coaxially fixed with the worm wheel that meshes with the worm gear.

[0014] By adopting the above technical solution, when the motor drives the worm to rotate, the worm drives the worm wheel to rotate, thereby driving the transmission shaft to rotate. Furthermore, under the self-locking action of the worm and the worm wheel, the transmission shaft can be prevented from rotating on its own when not being driven.

[0015] As an optional solution to the technical solution in this application, a rubber plate is fixedly installed at the end of the partition away from the drive shaft.

[0016] By adopting the above technical solution, when the partition rotates and when the material gets stuck between the rubber plate and the inner wall of the hopper, the rubber plate will bend and deform, so as to avoid the problem of the material getting stuck in the partition.

[0017] As an optional solution to the technical solution in this application, the motor is a servo motor.

[0018] 3. Beneficial effects

[0019] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0020] 1. When the drive mechanism drives the transmission shaft to rotate counterclockwise, a V-shaped storage bin is formed between every two partitions. Through scraping against the inner wall of the hopper, the material in each storage bin is quantitative. Then, the drive mechanism drives the storage bin to rotate counterclockwise, and the material falls into the feeding pipe. When it is necessary to discharge excess material in the hopper, the drive mechanism drives the transmission shaft to rotate clockwise, and the material in the storage bin is discharged through the discharge pipe. At the same time, during the feeding and discharging process, the drive mechanism can also drive the agitator to stir the material in the hopper to avoid material clumping and also to clear the hopper and prevent material accumulation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an injection molding machine unloading device disclosed in a preferred embodiment of this application;

[0022] Figure 2 This is a schematic cross-sectional view of an injection molding machine unloading device disclosed in a preferred embodiment of this application;

[0023] Figure 3 A preferred embodiment of this application discloses an injection molding machine unloading device. Figure 2 Enlarged structural diagram at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the drive mechanism, transmission shaft, and stirring shaft structure of an injection molding machine unloading device according to a preferred embodiment of this application;

[0025] The following are the labels in the diagram: 1. Hopper; 2. Feeding pipe; 3. Discharge pipe; 4. Agitator; 401. Agitator shaft; 5. Drive shaft; 501. Partition plate; 502. Rubber plate; 6. Drive mechanism; 601. Motor; 602. Worm gear; 603. Worm wheel; 604. Synchronous pulley; 605. Synchronous belt. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] An injection molding machine unloading device includes a hopper 1, a feeding pipe 2, and an unloading pipe 3 connected in a Y-shape. A stirring paddle 4 is rotatably installed inside the hopper 1, and a drive shaft 5 is also rotatably connected inside the hopper 1. Multiple partitions 501 are distributed in a ring on the drive shaft 5. The stirring paddle 4 includes a stirring shaft 401, which is arranged parallel to the drive shaft 5. A drive mechanism 6 is connected between the stirring shaft 401 and the drive shaft 5.

[0028] Reference Figures 1-4 Both the drive shaft 5 and the stirring shaft 401 are rotatably connected to the hopper 1 via bearings. When the drive mechanism 6 drives the drive shaft 5 to rotate counterclockwise, a V-shaped storage bin is formed between every two partitions 501. Through scraping against the inner wall of the hopper 1, the material in each storage bin is quantitative. Then, the drive mechanism 6 drives the storage bin to rotate counterclockwise, and the material falls into the feeding pipe 2. When it is necessary to discharge excess material in the hopper 1, the drive mechanism 6 drives the drive shaft 5 to rotate clockwise, and the material in the storage bin is discharged through the discharge pipe 3. At the same time, during the feeding and discharging process, the drive mechanism 6 can also drive the stirring paddle 4 to stir the material in the hopper 1 to avoid material clumping and also to unclog the hopper 1 to prevent material accumulation.

[0029] The drive mechanism 6 includes a motor 601 fixed to the side wall of the hopper 1, a synchronous pulley 604 and a synchronous belt 605. The motor 601 is connected to the drive shaft 5. The drive shaft 5 and the stirring shaft 401 are both coaxially fixed with the synchronous pulley 604. The two synchronous pulleys 604 are connected to the synchronous belt 605.

[0030] Reference Figure 1 and Figure 4 The drive shaft 5 is driven to rotate by the motor 601. Under the transmission of the two synchronous pulleys 604 and the synchronous belt 605, the drive shaft 5 and the stirring shaft 401 rotate synchronously. The clockwise or counterclockwise rotation of the drive shaft 5 is achieved by the forward and reverse rotation of the motor 601.

[0031] The output shaft of motor 601 is coaxially fixed to worm 602, and the transmission shaft 5 is coaxially fixed to worm wheel 603 that meshes with worm 602.

[0032] Reference Figure 4 When the motor 601 drives the worm 602 to rotate, the worm 602 pushes the worm wheel 603 to rotate, thereby driving the transmission shaft 5 to rotate. Under the self-locking action of the worm 602 and the worm wheel 603, the transmission shaft 5 can be prevented from rotating on its own when not being driven.

[0033] A rubber plate 502 is fixedly installed at the end of the partition 501 away from the drive shaft 5.

[0034] Reference Figure 3 and Figure 4 When the partition 501 rotates, and when the material gets stuck between the rubber plate 502 and the inner wall of the hopper 1, the rubber plate 502 will bend and deform to avoid the problem of the material getting stuck in the partition 501.

[0035] Motor 601 is a servo motor.

[0036] In this embodiment, motor 601 is preferably a servo motor, so that the rotation frequency of the transmission shaft 5 can be set by the servo motor, thereby reasonably controlling the feeding frequency.

[0037] Working principle: During feeding, material is added into hopper 1, and motor 601 drives worm gear 602 to rotate worm wheel 603 counterclockwise, so that transmission shaft 5 drives multiple partitions 501 and the storage bin formed between partitions 501 to rotate clockwise. When the material in the storage bin passes through the feeding pipe 2, the material in the storage bin enters the feeding pipe 2 under the action of gravity. When unloading is required, motor 601 drives worm gear 602 to rotate worm wheel 603 counterclockwise, so that the storage bin rotates clockwise, so that the material in hopper 1 can be discharged through unloading pipe 3. During this process, stirring paddle 4 stirs the material in hopper 1 to prevent blockage.

Claims

1. A discharge device for an injection molding machine, comprising a hopper (1), a feeding pipe (2), and a discharge pipe (3) connected in a "Y"-shaped structure, characterized in that: A stirring paddle (4) is rotatably disposed inside the hopper (1), and a drive shaft (5) is also rotatably connected inside the hopper (1). The drive shaft (5) has multiple partitions (501) distributed in a ring. The stirring paddle (4) includes a stirring shaft (401). The stirring shaft (401) is arranged parallel to the drive shaft (5). A drive mechanism (6) is connected between the stirring shaft (401) and the drive shaft (5).

2. The injection molding machine unloading device according to claim 1, characterized in that: The drive mechanism (6) includes a motor (601), a synchronous pulley (604), and a synchronous belt (605) fixed on the side wall of the hopper (1). The motor (601) is connected to the drive shaft (5). The drive shaft (5) and the stirring shaft (401) are both coaxially fixed with the synchronous pulley (604). The two synchronous pulleys (604) are connected to the synchronous belt (605).

3. The injection molding machine unloading device according to claim 2, characterized in that: The output shaft of the motor (601) is coaxially fixed with the worm gear (602), and the transmission shaft (5) is coaxially fixed with the worm wheel (603) meshing with the worm gear (602).

4. The injection molding machine unloading device according to claim 1, characterized in that: A rubber plate (502) is fixedly installed at the end of the partition (501) away from the drive shaft (5).

5. The unloading device for an injection molding machine according to claim 2, characterized in that: The motor (601) is a servo motor.

Images