Double-screw-rod electric storage mechanism of injection molding machine
By using a dual-screw electric material storage mechanism and a pneumatic discharge device, and leveraging inert gas to drive the material feeding and dual-motor drive, the problems of slow and sticky plastic fluid feeding in injection molding machines are solved, achieving a highly efficient and clean injection molding process.
Patent Information
- Application Number
- CN202520688511.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-14
AI Technical Summary
In existing injection molding machines, the high viscosity of the plastic fluid leads to slow feeding speed and easy adhesion to the inner wall of the sump, forming lumps and affecting injection molding efficiency.
It adopts a dual-screw electric material storage mechanism, combined with a pneumatic discharge device and a dust-blocking device. It uses inert gas to push the plastic fluid to feed, and accelerates the feeding through a dual-motor driven dual-screw electric extrusion device. At the same time, it automatically adjusts the sealing state during the feeding and discharging process to prevent impurities from contaminating the material.
It significantly improves the feeding speed and efficiency of injection molding machines, avoids plastic clumping, keeps the material storage port clean, and prevents external impurities from entering.
Smart Images
Figure CN223834931U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding machines, and in particular to a double lead screw electric material storage mechanism for injection molding machines. Background Technology
[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They mainly consist of an injection system, a mold clamping system, a hydraulic transmission system, and an electrical control system. During operation, the plastic raw material is heated and melted in the barrel of the injection system, and then injected rapidly under high pressure into the closed mold cavity by the screw. After holding pressure and cooling to solidify, the mold clamping system opens the mold, and the ejection mechanism pushes out the molded plastic product, completing one injection cycle. Injection molding machines are widely used in many industries such as automotive, electronics, medical, and packaging, producing various plastic products such as plastic toys, mobile phone casings, disposable syringes, and plastic bottles. They are an indispensable key piece of equipment in the modern plastics processing industry.
[0003] In actual use, the plastic fluid waiting to be injected will be stored inside the storage port, and the injection will be controlled by an electronically controlled valve to enter the injection molding machine to perform the injection operation.
[0004] However, in actual use, due to the viscosity of the plastic fluid itself, the process of entering the injection molding machine is relatively slow, and it is very easy to stick to the inner wall of the sump, thus forming solid lumps, which hinders the normal injection efficiency of the injection molding machine. To solve the above problems, a dual-screw electric sump mechanism for injection molding machines is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a dual-screw electric material storage mechanism for injection molding machines, which aims to improve the problem in the prior art that the plastic fluid itself has a certain viscosity, so the process of entering the injection molding machine is relatively slow and it is very easy to stick to the inner wall of the storage port and form solid lumps.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a double screw electric material storage mechanism for an injection molding machine, comprising an injection molding machine body, a housing, and a double screw electric extrusion device. The housing is fixedly connected to the upper part of the injection molding machine body, the double screw electric extrusion device is provided on the inner surface of the housing, a material storage port is fixedly connected to the upper end of the housing, a pneumatic discharge device is provided inside the material storage port, and a dust blocking device is provided inside the material storage port.
[0007] The pneumatic discharge device includes a blower, an exhaust pipe is fixedly connected to the front end of the blower, a pressure relief valve is fixedly connected to the side of the exhaust pipe away from the blower, a connecting block is fixedly connected to the upper part of the pressure relief valve, a fixed shaft is fixedly connected to the inner side of the connecting block, and an air nozzle is fixedly connected to the upper end of the outer arc surface of the fixed shaft.
[0008] As a further description of the above technical solution:
[0009] The dust-blocking device includes a baffle, an inner shaft is fixedly connected to the inner side of the baffle, an outer shaft is rotatably connected to the outer arc surface of the inner shaft, a sealing plate is fixedly connected to the outer arc surface of the outer shaft, and a limit block is fixedly connected to the inner side of the baffle.
[0010] As a further description of the above technical solution:
[0011] The lower end of the storage port is connected to the twin-screw electric extrusion device, the pneumatic discharge device is located below the dust blocking device, and the outer surface of the fan is fixedly connected to the storage port.
[0012] As a further description of the above technical solution:
[0013] The outer surface of the exhaust pipe is fixedly connected to the connecting block, the end of the exhaust pipe away from the fan is connected to the fixed shaft, the exhaust pipe is fixedly connected to the exhaust port of the fan, and the connecting block and the pressure relief valve are both provided with through holes of the same shape as the internal exhaust pipe.
[0014] As a further description of the above technical solution:
[0015] The connecting block is circular in shape. The lower surface of the fixed shaft is fixedly connected to the pressure relief valve. Multiple through holes are opened on the upper part of the outer arc surface of the fixed shaft. The air nozzle is set in an inclined shape.
[0016] As a further description of the above technical solution:
[0017] The outer arc surface of the baffle is fixedly connected to the storage port. A rectangular groove is provided on the inner side of the baffle. The inner shaft diameter is smaller than that of the outer shaft. A through hole is provided on the inner surface of the outer shaft.
[0018] As a further description of the above technical solution:
[0019] The inner arc surface of the outer shaft is elastically connected to the inner shaft by a spiral spring, the outer surface of the sealing plate is in close contact with the baffle, and the upper part of the sealing plate is in contact with the limiting block.
[0020] As a further description of the above technical solution:
[0021] The limiting block is generally arc-shaped, and the end of the sealing plate near the storage port is arc-shaped.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, the pressure relief valve, fixed shaft, air nozzle, fan, exhaust pipe, and connecting block can replace the control of material discharge from the storage port by the electric control valve in the prior art. At the same time, the inert gas pushes the plastic fluid during the discharge process, which can significantly increase the discharge speed of the plastic fluid. It can also cooperate with the twin screw electric extrusion device to transfer materials, thereby improving the efficiency of the internal injection process of the injection molding machine.
[0024] 2. In this utility model, the outer shaft, inner shaft, limiting block, sealing plate, and baffle are provided to automatically open the sealing plate according to the feeding pressure during the feeding process, and automatically seal the upper part of the storage port by the elastic force of the spiral spring after the filling is completed, thereby preventing dust and impurities in the external environment from coming into contact with the plastic fluid stored inside after the filling is completed. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of the dual-screw electric material storage mechanism for an injection molding machine proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of a twin-screw electric drive device for a twin-screw electric material storage mechanism for an injection molding machine, as proposed in this utility model.
[0027] Figure 3 This is a schematic diagram of the dust-blocking device of the double lead screw electric material storage mechanism for an injection molding machine proposed in this utility model;
[0028] Figure 4 This is a schematic diagram of the baffle section of a double lead screw electric material storage mechanism for an injection molding machine proposed in this utility model;
[0029] Figure 5 This is a schematic diagram of a pneumatic discharge device for a double-screw electric material storage mechanism of an injection molding machine, as proposed in this utility model.
[0030] Figure 6 This is a schematic diagram of the fixed shaft section of a double lead screw electric material storage mechanism for an injection molding machine proposed in this utility model.
[0031] Legend:
[0032] 1. Injection molding machine body; 2. Pneumatic discharge device; 3. Dust baffle device; 4. Outer shell; 5. Material storage port; 6. Twin screw electric extrusion device; 201. Pressure relief valve; 202. Fixed shaft; 203. Air nozzle; 204. Fan; 205. Exhaust pipe; 206. Connecting block; 301. Outer shaft; 302. Inner shaft; 303. Limiting block; 304. Sealing plate; 305. Baffle. Detailed Implementation
[0033] 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.
[0034] Reference Figure 1 - Figure 3 The present invention provides an embodiment of a double screw electric material storage mechanism for an injection molding machine, comprising an injection molding machine body 1, a housing 4, and a double screw electric extrusion device 6. The housing 4 is fixedly connected to the upper part of the injection molding machine body 1, the double screw electric extrusion device 6 is provided on the inner surface of the housing 4, the material storage port 5 is fixedly connected to the upper end of the housing 4, the pneumatic discharge device 2 is provided inside the material storage port 5, and the dust blocking device 3 is provided inside the material storage port 5.
[0035] The pneumatic discharge device 2 includes a blower 204. An exhaust pipe 205 is fixedly connected to the front end of the blower 204. A pressure relief valve 201 is fixedly connected to the side of the exhaust pipe 205 away from the blower 204. A connecting block 206 is fixedly connected to the upper part of the pressure relief valve 201. A fixed shaft 202 is fixedly connected to the inner side of the connecting block 206. An air nozzle 203 is fixedly connected to the upper end of the outer arc surface of the fixed shaft 202.
[0036] The lower end of the storage port 5 is connected to the twin-screw electric extrusion device 6. This device uses a dual-motor drive to push the plastic fluid, ensuring uniform force on the fluid during pushing and preventing deviation or jamming. The outer surface of the twin-screw electric extrusion device 6 is equipped with a heating layer to heat the plastic fluid, reducing its viscosity and making it easier to push, further improving the efficiency of the injection molding process. The pneumatic discharge device 2 is located below the dust baffle 3. The outer surface of the blower 204 is fixedly connected to the storage port 5. The inlet of the blower 204 is connected to an inert gas storage tank, allowing high-pressure inert gas to be delivered to the exhaust pipe 205 when activated. The outer surface of the exhaust pipe 205 is connected to the connecting block. The exhaust pipe 205 is fixedly connected to the fixed shaft 202 at one end away from the fan 204, so that the high-pressure inert gas inside can be transported to the inside of the fixed shaft 202. The exhaust pipe 205 is fixedly connected to the exhaust port of the fan 204. The connecting block 206 and the pressure relief valve 201 are both provided with through holes with the same shape as the internal exhaust pipe 205, so that the exhaust pipe 205 can pass through without interfering with its normal operation. The connecting block 206 is generally annular. The lower surface of the fixed shaft 202 is fixedly connected to the pressure relief valve 201. The upper part of the outer arc surface of the fixed shaft 202 is provided with multiple through holes, so that it can be connected to the air nozzle 203. The air nozzle 203 is generally inclined, so that the output gas can move downward and push the plastic fluid downward to accelerate its movement.
[0037] Reference Figure 4 - Figure 6 The dust blocking device 3 includes a baffle 305, an inner shaft 302 is fixedly connected to the inner side of the baffle 305, an outer shaft 301 is rotatably connected to the outer arc surface of the inner shaft 302, a sealing plate 304 is fixedly connected to the outer arc surface of the outer shaft 301, and a limit block 303 is fixedly connected to the inner side of the baffle 305.
[0038] The outer arc surface of the baffle 305 is fixedly connected to the storage port 5. A rectangular groove is provided on the inner side of the baffle 305, so that the sealing plate 304 can move inside it. The diameter of the inner shaft 302 is smaller than that of the outer shaft 301. A through hole is provided on the inner surface of the outer shaft 301, so that the inner shaft 302 can be located inside it. The inner arc surface of the outer shaft 301 is elastically connected to the inner shaft 302 by a spiral spring. Therefore, the sealing plate 304 outside the outer shaft 301 can be driven by the elastic force of the spiral spring. Under the influence of force, it always adheres to the upper limit block 303. The outer surface of the sealing plate 304 is in close contact with the baffle 305. Therefore, when the sealing plate 304 is in contact with the limit block 303, it can maintain the sealing state of the upper part of the storage port 5. The upper part of the sealing plate 304 is in contact with the limit block 303. The limit block 303 is generally set as an arc shape. The end of the sealing plate 304 near the storage port 5 is set as an arc surface. Therefore, the limit block 303 will not cause motion interference with the storage port 5 during rotation.
[0039] Working principle: When using this device, heated plastic needs to be injected into the storage port 5 through an external feeding device. At this time, due to the pressure of the plastic fluid above, the pressure at the upper end of the sealing plate 304 will be greater than the elastic force of the spiral spring. At this time, the sealing plate 304 will drive the outer shaft 301 to rotate, allowing the plastic fluid to enter the storage port 5. After the injection is completed, as the amount of plastic fluid above gradually decreases, the pressure at the upper part of the sealing plate 304 gradually decreases. At this time, the spiral spring will drive the outer shaft 301 and the sealing plate 304 to rotate in opposite directions through its own elastic force until the sealing plate 304 contacts the limiting block 303, thereby maintaining the sealing of the upper part of the storage port 5 and preventing dust and impurities in the external environment from contacting the plastic fluid and causing contamination during the storage process.
[0040] Meanwhile, when it is necessary to inject the plastic fluid stored inside the storage port 5 into the twin screw electric extrusion device 6, the blower 204 can be started to input inert gas into the exhaust pipe 205, and the inert gas is input into the storage port 5 through the exhaust pipe 205, which increases the internal air pressure. At this time, due to the increase in air pressure inside the storage port 5, the pressure relief valve 201 will exceed its set pressure relief threshold and automatically remain open. The plastic fluid inside the storage port 5 will also accelerate downward under the push of air pressure, thereby improving its feeding speed and feeding efficiency.
[0041] 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 twin-screw electric material storage mechanism for an injection molding machine, comprising an injection molding machine body (1), a housing (4), and a twin-screw electric extrusion device (6), characterized in that: The upper part of the injection molding machine body (1) is fixedly connected to the outer shell (4), the inner surface of the outer shell (4) is provided with a double screw electric extrusion device (6), the upper end of the outer shell (4) is fixedly connected to the storage port (5), the inside of the storage port (5) is provided with a pneumatic discharge device (2), and the inside of the storage port (5) is provided with a dust blocking device (3). The pneumatic discharge device (2) includes a blower (204), an exhaust pipe (205) is fixedly connected to the front end of the blower (204), a pressure relief valve (201) is fixedly connected to the side of the exhaust pipe (205) away from the blower (204), a connecting block (206) is fixedly connected to the upper part of the pressure relief valve (201), a fixed shaft (202) is fixedly connected to the inner side of the connecting block (206), and an air nozzle (203) is fixedly connected to the upper end of the outer arc surface of the fixed shaft (202).
2. The injection molding machine double-screw electric material storage mechanism according to claim 1, characterized in that: The dust-blocking device (3) includes a baffle (305), an inner shaft (302) is fixedly connected to the inner side of the baffle (305), an outer shaft (301) is rotatably connected to the outer arc surface of the inner shaft (302), a sealing plate (304) is fixedly connected to the outer arc surface of the outer shaft (301), and a limit block (303) is fixedly connected to the inner side of the baffle (305).
3. The injection molding machine double-screw electric material storage mechanism according to claim 1, characterized in that: The lower end of the storage port (5) is connected to the twin screw electric extrusion device (6), the pneumatic discharge device (2) is located below the dust blocking device (3), and the outer surface of the fan (204) is fixedly connected to the storage port (5).
4. The injection molding machine double-screw electric material storage mechanism according to claim 1, characterized in that: The outer surface of the exhaust pipe (205) is fixedly connected to the connecting block (206). The end of the exhaust pipe (205) away from the fan (204) is connected to the fixed shaft (202). The exhaust pipe (205) is fixedly connected to the exhaust port of the fan (204). The connecting block (206) and the pressure relief valve (201) are both provided with through holes of the same shape as the internal exhaust pipe (205).
5. The double-screw electric material storage mechanism for injection molding machines according to claim 1, characterized in that: The connecting block (206) is circular in shape. The lower surface of the fixed shaft (202) is fixedly connected to the pressure relief valve (201). Multiple through holes are opened on the upper part of the outer arc surface of the fixed shaft (202). The air nozzle (203) is inclined in shape.
6. The injection molding machine double lead screw electric storage mechanism according to claim 2, characterized in that: The outer arc surface of the baffle (305) is fixedly connected to the storage port (5). A rectangular groove is provided on the inner side of the baffle (305). The diameter of the inner shaft (302) is smaller than that of the outer shaft (301). A through hole is provided on the inner surface of the outer shaft (301).
7. The injection molding machine double lead screw electric material storage mechanism according to claim 2, characterized in that: The inner arc surface of the outer shaft (301) is elastically connected to the inner shaft (302) by a spiral spring. The outer surface of the sealing plate (304) is in close contact with the baffle (305). The upper part of the sealing plate (304) is in contact with the limiting block (303).
8. The double-screw electric material storage mechanism for an injection molding machine according to claim 2, characterized in that: The limiting block (303) is generally arc-shaped, and the end of the sealing plate (304) near the storage port (5) is arc-shaped.