Liquid material supply device for special plastic production

Abstract

The utility model discloses a liquid material feeding device for special plastic production, which comprises a melting material barrel, a heating material barrel and a controller, the melting material barrel is connected with the heating material barrel through a first negative pressure material suction structure, and a first electromagnetic valve is arranged at a feeding hole of the heating material barrel; an exhaust valve is arranged at the top of the heating material barrel, a liquid level alarm in threaded connection is arranged at the bottom of the heating material barrel, a second electromagnetic valve is connected to a discharging opening of the heating material barrel, and a weighing material barrel is connected to the lower portion of the second electromagnetic valve and communicates with the injection molding device through a second negative-pressure material suction structure; quantitative feeding can be carried out according to the weight of molten liquid plastic required by different types of molding by arranging the weighing material barrel, then feed liquid is conveyed to the injection molding device through the negative pressure material suction structure to complete quantitative injection molding, and waste caused by overflow of the feed liquid in the injection molding process can be avoided through quantitative feeding; and meanwhile, a flow meter can be arranged on the feeding pipe of the weighing charging basket, so that the amount of feed liquid for injection molding each time can be more accurately metered.

Description

Technical Field

[0001] The utility model relates to the field of injection molding feeding, in particular to a liquid material feeding device for special plastic production. Background Art

[0002] In the plastic injection molding process, powdered or granular raw materials are injected into the hopper and heated to complete the injection molding. However, high-temperature resistant special plastics (such as polyimide PI, polyetheretherketone PEEK, polyamideimide PAI, etc.) require a high-temperature melting device to melt them before injection molding. Since the push screw has a cycle during the injection molding process, it is necessary to design a device that can quantitatively feed the materials to avoid waste caused by overflow of molten plastic mucus. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a liquid material feeding device for special plastic production to solve the problems existing in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A liquid material feeding device for special plastic production comprises a melting barrel, a heating barrel and a controller, wherein the outer wall of the heating barrel is provided with a heating wire, the bottom of the melting barrel is provided with a discharge port connected to a feeding pipe, the feeding pipe and the heating barrel are connected through a first negative pressure suction structure, the heating barrel is provided with a feeding port connected to the feeding pipe, and a first solenoid valve is provided at the feeding port; the top of the heating barrel is provided with an exhaust valve, and the bottom is provided with a threaded liquid level alarm, and the liquid level alarm has a sealing gasket at the connection between the inner and outer threads of the heating barrel; the discharge port of the heating barrel is connected with a second solenoid valve, and a weighing barrel is connected below the second solenoid valve, the bottom of the weighing barrel has a cavity, a weighing plate, a weighing sensor and an alarm are provided in the cavity, the weighing barrel is connected with an injection molding device through a second negative pressure suction structure, the heating barrel is provided with an observation window, the weighing barrel is provided with a third solenoid valve, and a flow meter is also provided between the third solenoid valve and the second solenoid valve.

[0006] Furthermore, a stirring device is provided in the heating barrel, and the stirring device includes a motor and a rotating rod that are rotatably connected, and also includes a rotating blade fixedly connected to the rotating rod.

[0007] The beneficial effect of the utility model is that by setting a weighing barrel, quantitative feeding can be carried out according to the weight of the molten liquid plastic required for different moldings, and then the liquid material is transported to the injection molding device through the negative pressure suction structure to complete quantitative injection molding. Quantitative feeding can avoid waste caused by overflow of liquid material during the injection molding process. At the same time, a flow meter can be set on the feed pipe of the weighing barrel to more accurately measure the amount of liquid material for each injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0009] Figure 2 It is a cross-sectional view of the weighing barrel of the utility model;

[0010] Figure 3 It is a cross-sectional view of the heating barrel of the utility model; DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0012] A liquid material feeding device for special plastic production, such as Figure 1-3As shown, it includes a molten material barrel 1, a heating material barrel 6 and a controller 15, and the feeding device is controlled by the controller 15. The outer wall of the heating material barrel 6 has a heating wire, and the bottom of the molten material barrel 1 has a discharge port 2 connected to the feeding pipe 3. The feeding pipe 3 and the heating material barrel 6 are connected through a first negative pressure suction structure 4. The heating material barrel 6 has a feeding port connected to the feeding pipe 3, and a first electromagnetic valve 5 is provided at the feeding port. When the first electromagnetic valve 5 is opened, the first negative pressure suction structure 4 sucks the liquid in the molten material barrel 1 into the heating material barrel 6 through the feeding pipe 3. After a proper amount of liquid is sucked in, the first electromagnetic valve 5 is closed, and the heating material barrel 6 can replenish the heat lost by the liquid in the feeding pipe 3. The heating barrel 6 has an exhaust valve 7 at the top, and the air pressure in the barrel can be adjusted by the exhaust valve 7 during the heating process to maintain the air pressure balance; the bottom of the heating barrel 6 is provided with a threaded liquid level alarm 604, and the liquid level alarm 604 has a sealing gasket at the connection between the inner and outer threads of the heating barrel 6. When the liquid level alarm 604 senses that the liquid level has dropped to a threshold value, it can also alarm to remind the operator to add material to the barrel in time; the heating barrel 6 is connected to a second solenoid valve 9 at the outlet, and a weighing barrel 12 is connected below the second solenoid valve 9. The weighing barrel 12 has a cavity at the bottom, and a weighing plate 121, a weighing sensor 122 and an alarm are arranged in the cavity. The device 123 is opened, and the second solenoid valve 9 is opened, and the liquid enters the weighing barrel 12. The weighing barrel 12 is connected with the injection molding device 14 through the second negative pressure suction structure 13. The liquid is transported to the injection molding device 14 through the second negative pressure suction structure 13 to complete quantitative injection molding. The heating barrel 6 is provided with an observation window 8, and the remaining liquid in the heating barrel 6 can be observed through the observation window 8 to replenish the material in time. The weighing barrel 12 is provided with a third solenoid valve 11, and a flow meter 10 is also provided between the third solenoid valve 11 and the second solenoid valve 9. The liquid enters the weighing barrel 12 through the flow meter 10, and the second solenoid valve 9 and the third solenoid valve 11 are closed after the flow reaches the preset value of the flow meter 10. The third solenoid valve 11 is then started, and the weighing sensor 122 and the alarm 123 are started to weigh the liquid material in the weighing barrel 12. After that, the weight data is transmitted back to the controller 15 through the sensor 122. If the weighing barrel 12 reaches the predetermined weight, the weighing sensor 122 and the alarm 123 are turned off, and the second negative pressure material suction structure 13 is started to transport the liquid material to the injection molding device 14 to complete the quantitative injection molding. If the weighing barrel 12 does not reach the predetermined weight, the alarm 123 will sound an alarm to remind the operator to repair the equipment in time, so as to ensure that the equipment can accurately measure the amount of liquid material for each injection. Through the dual measurement of the flow meter 10 and the weighing barrel 12, the feed amount can be accurately measured.

[0013] In the utility model, preferably, a stirring device is provided in the heating barrel 6, and the stirring device includes a motor 601 and a rotating rod 602 that are rotatably connected, and also includes a rotating blade 603 fixedly connected to the rotating rod 602. The rotating blade 603 can stir the liquid in the barrel to evenly maintain a constant temperature and a completely molten state.

[0014] The working principle of this utility model:

[0015] When injection molding is performed, the power supply is started, and the feeding device is controlled by the controller 15. First, the first solenoid valve 5 is opened, and the first negative pressure suction structure 4 sucks the liquid in the molten barrel 1 into the heating barrel 6 through the feeding pipe 3. After a proper amount of liquid is sucked in, the first solenoid valve 5 is closed. The heating barrel 6 can replenish the heat lost by the liquid in the feeding pipe 3. The liquid is stirred in the barrel by rotating the blades 603 to maintain a constant temperature and a completely molten state. During the heating process, the air pressure in the barrel can be adjusted by the exhaust valve 7 to maintain the air pressure balance; then the second solenoid valve 9 and the third solenoid valve 11 are opened, and the liquid enters the weighing barrel 12 through the flow meter 10. The flow meter 10 is closed after the flow reaches the preset value. The second solenoid valve 9 and the third solenoid valve 11, then start the weighing sensor 122 and the alarm 123 and weigh the liquid in the weighing barrel 12, and then transmit the weight data back to the controller 15 through the sensor 122. If the weighing barrel 12 reaches the predetermined weight, the weighing sensor 122 and the alarm 123 are turned off and the second negative pressure suction structure 13 is started to transport the liquid to the injection molding device 14 to complete the quantitative injection molding; if the weighing barrel 12 does not reach the predetermined weight, the alarm 123 will sound an alarm to remind the operator to repair the equipment in time, so as to ensure that the equipment can accurately measure the amount of liquid for each injection; through the dual measurement of the flow meter 10 and the weighing barrel 12, the feeding amount can be accurately measured. At the same time, the remaining amount of liquid in the heating barrel 6 can be observed through the observation window 8, and when the liquid level alarm 604 senses that the liquid level has dropped to the threshold, it can also sound an alarm to remind the operator to add material to the barrel in time.

[0016] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid material feeding device for special plastic production, comprising a melting barrel (1), a heating barrel (6) and a controller (15), wherein the outer wall of the heating barrel (6) has a heating wire, characterized in that: The bottom of the molten material barrel (1) has a discharge port (2) connected to the material delivery pipe (3), the material delivery pipe (3) is connected to the heating material barrel (6) through a first negative pressure material suction structure (4), the heating material barrel (6) has a feed port connected to the material delivery pipe (3), and the feed port is provided with a first solenoid valve (5); the top of the heating material barrel (6) has an exhaust valve (7), and the bottom is provided with a threaded liquid level alarm (604), and the liquid level alarm (604) has a sealing gasket at the internal and external threaded connection of the heating material barrel (6); the discharge port of the heating material barrel (6) is connected to a second A solenoid valve (9), a weighing barrel (12) is connected below the second solenoid valve (9), the weighing barrel (12) has a cavity at the bottom, a weighing plate (121), a weighing sensor (122) and an alarm (123) are arranged in the cavity, the weighing barrel (12) is connected to the injection molding device (14) through a second negative pressure suction structure (13), an observation window (8) is arranged on the heating barrel (6), the weighing barrel (12) has a third solenoid valve (11), and a flow meter (10) is also arranged between the third solenoid valve (11) and the second solenoid valve (9).

2. The liquid material feeding device for special plastic production according to claim 1, characterized in that: The heating barrel (6) is provided with a stirring device, which comprises a motor (601) and a rotating rod (602) which are rotatably connected, and also comprises a rotating blade (603) which is fixedly connected to the rotating rod (602).

Images