Injection quantity precision control device of injection molding machine

Abstract

The utility model relates to injection molding machine technical field discloses a kind of injection molding machine injection quantity accurate control device, including injection molding machine body, nozzle is arranged in the inside of injection molding machine body, control assembly is arranged in the inside of injection molding machine body, the control assembly includes fixed frame, the fixed frame slidingly connects in the inside of injection molding machine body, the fixed frame top is fixedly connected with connecting plate, the connecting plate inside is fixedly connected with hopper, the fixed frame bottom is fixedly connected with support plate, the fixed frame both sides are provided with dismounting assembly.In the utility model, material is guided into the inside of barrel by hopper, then fixed block is pushed by cylinder, so that barrel slides, then fixed amount of material in the inside of barrel is added into the inside of nozzle by feed pipe, so as to realize the effect of quantitative control injection quantity, solve the injection quantity deviation problem caused by unstable raw material input, improve product quality consistency and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a device for precise control of injection volume in injection molding machines. Background Technology

[0002] Injection molding, as a core process in plastic product manufacturing, directly impacts product performance and yield due to the dimensional accuracy and weight consistency of the finished products. Injection volume, a key parameter in the injection molding process, is particularly important for high-value-added products. Traditional injection molding machines rely on screw pre-plasticizing stroke and hydraulic / electric drive systems to control injection volume. However, due to fluctuations in raw material properties, mechanical transmission errors, and environmental factors, there are still certain deviations in injection volume. Therefore, developing a high-precision injection volume control device for injection molding machines is of great significance for improving product quality, reducing scrap rates, and optimizing production costs.

[0003] Existing injection volume control technologies for injection molding machines are mostly based on traditional hydraulic drives and simple metering logic. Generally, the injection screw is driven by a hydraulic system, and the injection volume is estimated by setting parameters such as screw stroke and hydraulic pressure, combined with empirical values ​​of material delivery in the barrel. In terms of mechanical structure, it mainly consists of hydraulic cylinders, ordinary screws, and barrel assemblies. Pressure and flow are regulated by hydraulic valve groups, and the screw position is monitored by limit switches or simple sensors, attempting to control the amount of material delivered from the hopper to the mold cavity and achieve basic control of the injection process.

[0004] In existing technologies, the lack of a precise raw material quantitative input mechanism makes it easy for uneven feeding problems to occur with manual or conventional feeding methods. That is, the amount of raw material entering the barrel is difficult to control stably, sometimes too much and sometimes too little. When the screw does not have enough raw material, it will cause insufficient injection volume, resulting in missing material and shrinkage marks in the product. Insufficient injection volume makes the molten material prone to backflow in the barrel, causing large fluctuations in the actual injection volume. This leads to the weight and size deviation of the same batch of products exceeding the standard, which cannot meet the requirements of precision injection molding production for the stability of raw material input and the consistency of injection volume. Therefore, a precise injection volume control device for injection molding machines is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a device for precise control of injection volume in injection molding machines, which aims to improve the problems of large fluctuations in injection volume and poor product quality consistency caused by unstable raw material input in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for precise control of injection volume in an injection molding machine includes an injection molding machine body, a nozzle disposed inside the injection molding machine body, and a control component disposed inside the injection molding machine body.

[0008] The control assembly includes a fixed frame slidably connected inside the injection molding machine body. A connecting plate is fixedly connected to the top of the fixed frame, and a hopper is fixedly connected inside the connecting plate. A support plate is fixedly connected to the bottom of the fixed frame. A cylinder is fixedly connected to one side of the fixed frame, and a fixed block is fixedly connected to the output end of the cylinder. A material cylinder is fixedly connected to one side of the fixed block. A first baffle is rotatably connected inside the fixed block. The upper surface of the first baffle is in contact with the bottom end of the material cylinder, and the bottom of the first baffle is in contact with the inner wall of the support plate. A second baffle is fixedly connected to the outer wall of the material cylinder. A feed pipe is fixedly connected inside the nozzle, and the top end of the feed pipe fits into the bottom end of the material cylinder. Disassembly components are provided on both sides of the fixed frame.

[0009] As a further description of the above technical solution:

[0010] The disassembly assembly includes multiple connecting blocks and connecting discs. One side of each of the multiple connecting blocks is fixedly connected to the side wall of the fixing frame, and one side of each connecting disc is fixedly connected to the inner wall of the connecting blocks.

[0011] As a further description of the above technical solution:

[0012] A shrinking rod is fixedly connected to one side of the connecting plate, and a squeezing plate is fixedly connected to one end of the shrinking rod.

[0013] As a further description of the above technical solution:

[0014] The injection molding machine body has multiple slots inside, and a locking post is fixedly connected to one side of the extrusion plate.

[0015] As a further description of the above technical solution:

[0016] The engaging post engages with the slot, and a connecting rod is fixedly connected to the outer wall of the extrusion disc.

[0017] As a further description of the above technical solution:

[0018] The connecting rod is slidably connected inside the connecting block, and a lever is fixedly connected to the top of the connecting rod.

[0019] As a further description of the above technical solution:

[0020] A spring is provided on the outer wall of the retraction rod. One end of the spring is fixedly connected to the side wall of the connecting disc, and the other end is fixedly connected to the side wall of the extrusion disc.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the material is guided into the barrel by the hopper, and then the fixed block is pushed by the cylinder to make the barrel slide. Then, a fixed amount of material inside the barrel is added into the nozzle through the feed pipe. The material inside the hopper continues to flow out through the baffle, thereby achieving the effect of quantitative control of injection volume, solving the problem of injection volume deviation caused by unstable raw material input, and improving the consistency of product quality and production efficiency.

[0023] 2. In this utility model, by pulling the lever, the extrusion plate is driven to squeeze the retracting rod and the spring, causing the retracting rod and the spring to deform, which further drives the locking column to disengage from the locking slot to unlock, thereby achieving the effect of quick installation and disassembly of the control component. This solves the problem of inconvenient maintenance and installation of the control component and improves the efficiency and flexibility of equipment maintenance. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a device for precisely controlling the injection volume of an injection molding machine according to the present invention;

[0025] Figure 2 This is a schematic diagram of the top of the injection molding machine body, which is a device for precisely controlling the injection volume of an injection molding machine according to this utility model.

[0026] Figure 3 This is a schematic diagram of the internal structure of the fixing frame of the injection volume precision control device for an injection molding machine proposed in this utility model;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the side wall of the fixing frame of the injection volume precision control device for injection molding machines proposed in this utility model;

[0029] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0030] Legend:

[0031] 1. Injection molding machine body; 2. Nozzle; 3. Fixing frame; 4. Connecting plate; 5. Hopper; 6. Support plate; 7. Cylinder; 8. Fixing block; 9. Material barrel; 10. Baffle one; 11. Feed pipe; 12. Connecting block; 13. Connecting disc; 14. Shrink rod; 15. Extrusion disc; 16. Clamping column; 17. Clamping groove; 18. Connecting rod; 19. Pulley; 20. Spring; 21. Baffle two. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-4 The present invention provides an embodiment of an injection molding machine injection volume precision control device, including an injection molding machine body 1, a nozzle 2 is provided inside the injection molding machine body 1 to ensure that molten plastic can be efficiently injected into the mold through the nozzle 2, and a control component is provided inside the injection molding machine body 1 so that the injection volume can be controlled by mechanical action.

[0034] The control assembly includes a fixed frame 3, which is slidably connected inside the injection molding machine body 1. The fixed frame 3 provides stability and adjustability, facilitating the adjustment of the relative positions of the components during injection. A connecting plate 4 is fixedly connected to the top of the fixed frame 3, and a hopper 5 is fixedly connected inside the connecting plate 4. The hopper 5 stores raw materials, ensuring a stable supply. A support plate 6 is fixedly connected to the bottom of the fixed frame 3, providing support and fixation within the control device to ensure the stability of the control assembly during injection molding. A cylinder 7 is fixedly connected to one side of the fixed frame 3. The cylinder 7 drives the movement of mechanical components using air pressure, achieving precise adjustment of the injection volume. A fixing block 8 is fixedly connected to the output end of the cylinder 7, and a material cylinder 9 is fixedly connected to one side of the fixing block 8. A baffle 10 is rotatably connected inside the fixed block 8. The upper surface of the baffle 10 is tightly fitted to the bottom end of the material cylinder 9, and the bottom of the baffle 10 is in contact with the inner wall of the support plate 6 to ensure that the plastic melt in the material cylinder 9 does not flow out. The upper surface of the baffle 10 is fitted to the bottom end of the material cylinder 9, and the bottom of the baffle 10 is in contact with the inner wall of the support plate 6. A baffle 21 is fixedly connected to the outer wall of the material cylinder 9. Its function is to prevent the material inside the hopper 5 from continuing to be conveyed downward. A feed pipe 11 is fixedly connected inside the nozzle 2. The top end of the feed pipe 11 fits with the bottom end of the material cylinder 9 to ensure that the plastic melt is smoothly conveyed from the material cylinder 9 to the nozzle 2. Disassembly components are provided on both sides of the fixed frame 3. The disassembly components are used to easily disassemble the control device when maintenance, cleaning or replacement of parts is required.

[0035] Specifically, when it is necessary to solve problems such as unstable raw material input, injection volume fluctuations, or poor product quality consistency during injection molding, the operator first pours the material into the hopper 5. Guided by the hopper 5, the material is further fed into the barrel 9. The barrel 9 is connected to the cylinder 7, and the fixed block 8 moves with the pushing force of the cylinder 7, thereby driving the barrel 9 to move synchronously. When the barrel 9 starts to move, the baffle 10 also moves. After the baffle 10 loses the support of the support plate 6, the baffle 10 will automatically open due to the gravity of the material in the barrel 9, thereby releasing the material. By precisely controlling the amount of material dispensed each time, the injection volume can be effectively adjusted to ensure accurate material delivery.

[0036] Reference Figure 5 and Figure 6 The disassembly assembly includes multiple connecting blocks 12 and connecting discs 13. One side of each connecting block 12 is fixedly connected to the side wall of the mounting frame 3. One side of the connecting disc 13 is fixedly connected to the inner wall of the connecting blocks 12. A shrinkage rod 14 is fixedly connected to one side of the connecting disc 13, and one end of the shrinkage rod 14 is fixedly connected to an extrusion disc 15. Multiple slots 17 are provided inside the injection molding machine body 1. A locking post 16 is fixedly connected to one side of the extrusion disc 15. The locking post 16 engages with the slots 17, thereby achieving quick locking and unlocking of the disassembly assembly and ensuring its stability. A connecting rod 18 is fixedly connected to the outer wall of the extrusion disc 15, and the connecting rod 18 is slidably connected... Inside the connecting block 12, a lever 19 is fixedly connected to the top of the connecting rod 18. The lever 19 can be manually controlled to adjust the position of the connecting rod 18, thereby adjusting the state of the extrusion plate 15, which facilitates the user to quickly drive the movement of the disassembly components. A spring 20 is provided on the outer wall of the retraction rod 14. The function of the spring 20 is to provide a certain restoring force to ensure that the retraction rod 14 can return to the initial position when released, thereby further providing elastic restoring force to the locking column 16, ensuring that it can quickly reset after movement. One end of the spring 20 is fixedly connected to the side wall of the connecting plate 13, and the other end is fixedly connected to the side wall of the extrusion plate 15.

[0037] Specifically, when maintenance and cleaning of the control components are required, the operator can simultaneously pull lever 19. The action of lever 19 will cause the extrusion plate 15 to slide inside the connecting block 12. During the sliding process of the extrusion plate 15, it will compress the retraction rod 14 and the spring 20, causing the retraction rod 14 and the spring 20 to deform and store elastic potential energy. At the same time, the sliding of the extrusion plate 15 will cause the locking post 16 to separate from the locking groove 17, realizing the unlocking operation. After unlocking, the operator can quickly disassemble and install the control components to complete the work of rapid maintenance and cleaning. Thus, the entire component can not only work efficiently, but also has convenient cleaning and maintenance functions, ensuring the long-term stable operation of the equipment.

[0038] Working Principle: When using this injection molding machine's precise injection volume control device, the material is first poured into the hopper 5 by the operator. The hopper 5 then guides the material into the barrel 9. The output end of the cylinder 7 pushes the fixed block 8, causing the barrel 9 to move synchronously. This movement of the barrel 9 drives the baffle 10. When the baffle 10 is no longer supported by the support plate 6, it opens due to the gravity of the material inside the barrel 9, releasing the material. The injection volume is controlled by adjusting the amount of material dispensed each time. When maintenance and cleaning of the control components are required, the operator simultaneously pulls the lever 19, causing the extrusion plate 15 to slide inside the connecting block 12. Simultaneously, the extrusion plate 15 slides, squeezing the retraction rod 14 and spring 20, causing them to deform and store elastic potential energy. The movement of the extrusion plate 15 also causes the locking column 16 to disengage from the locking slot 17, unlocking the control components. After unlocking, the operator can quickly disassemble and reassemble the control components for rapid maintenance and cleaning.

[0039] 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 device for precise injection volume control of an injection molding machine, comprising an injection molding machine body (1), characterized in that: The injection molding machine body (1) is provided with a nozzle (2) and a control component is provided inside the injection molding machine body (1); The control component includes a fixed frame (3), which is slidably connected inside the injection molding machine body (1). A connecting plate (4) is fixedly connected to the top of the fixed frame (3), and a hopper (5) is fixedly connected inside the connecting plate (4). A support plate (6) is fixedly connected to the bottom of the fixed frame (3). A cylinder (7) is fixedly connected to one side of the fixed frame (3), and a fixing block (8) is fixedly connected to the output end of the cylinder (7). A material cylinder is fixedly connected to one side of the fixing block (8). (9) A baffle (10) is rotatably connected inside the fixing block (8). The upper surface of the baffle (10) is in contact with the bottom end of the material cylinder (9). The bottom of the baffle (10) is in contact with the inner wall of the support plate (6). A baffle (21) is fixedly connected to the outer wall of the material cylinder (9). A feed pipe (11) is fixedly connected inside the nozzle (2). The top end of the feed pipe (11) is in contact with the bottom end of the material cylinder (9). Disassembly components are provided on both sides of the fixing frame (3).

2. The injection volume precision control device for an injection molding machine according to claim 1, characterized in that: The disassembly assembly includes multiple connecting blocks (12) and a connecting plate (13). One side of each of the multiple connecting blocks (12) is fixedly connected to the side wall of the fixing frame (3), and one side of the connecting plate (13) is fixedly connected to the inner wall of the connecting block (12).

3. The injection volume precision control device for an injection molding machine according to claim 2, characterized in that: A shrinking rod (14) is fixedly connected to one side of the connecting plate (13), and a pressing plate (15) is fixedly connected to one end of the shrinking rod (14).

4. The injection volume precision control device for an injection molding machine according to claim 3, characterized in that: The injection molding machine body (1) has multiple slots (17) inside, and a locking post (16) is fixedly connected to one side of the extrusion plate (15).

5. The injection volume precision control device for an injection molding machine according to claim 4, characterized in that: The engaging post (16) engages with the slot (17), and a connecting rod (18) is fixedly connected to the outer wall of the extrusion plate (15).

6. The injection volume precision control device for an injection molding machine according to claim 5, characterized in that: The connecting rod (18) is slidably connected inside the connecting block (12), and a lever (19) is fixedly connected to the top of the connecting rod (18).

7. The injection volume precision control device for an injection molding machine according to claim 6, characterized in that: A spring (20) is provided on the outer wall of the retraction rod (14). One end of the spring (20) is fixedly connected to the side wall of the connecting disc (13), and the other end is fixedly connected to the side wall of the extrusion disc (15).

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