Screw pushing mechanism of injection molding machine

Abstract

The utility model discloses a screw rod pushing mechanism of an injection molding machine, and relates to the technical field of screw rod pushing mechanisms, the screw rod pushing mechanism comprises an injection molding machine body and a feed hopper located on the injection molding machine body, the feed hopper is provided with a screw rod pushing assembly, the screw rod pushing assembly comprises a screw rod body, and the screw rod body is rotatably arranged in the feed hopper; the crushing roller is fixedly connected to one side of the top of the screw rod body, and the crushing roller is used for crushing the caked raw materials; and the connecting frame is fixedly connected to the other side of the top of the screw rod body, and a scraping plate is arranged on one side of the connecting frame. According to the feeding device, the screw pushing assembly is arranged, the screw is conveniently used for pushing the cooperation of the spiral blade and the screw body, uniform feeding is conveniently achieved, meanwhile, the phenomenon that raw materials are caked in the feeding hopper can be avoided through the crushing roller, and the raw materials adhering to the inner wall face of the feeding hopper can be fully scraped off through the cooperation of the scraping plate and the elastic assembly.

Description

Technical Field

[0001] The utility model relates to the field of screw pushing mechanisms, and particularly relates to a screw pushing mechanism of an injection molding machine. Background Art

[0002] At present, in the field of plastic processing, it is often necessary to use an injection molding machine to inject into a mold to obtain the required products. The injection molding machine is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics, and the screw pushing mechanism can realize the pushing of materials.

[0003] At present, when using an injection molding machine, feeding needs to be achieved through a feed hopper, then through the heat melting of the material, and then ejected through a discharge nozzle to inject the heat-melted plastic raw material into the mold, so as to achieve molding by using the mold.

[0004] In actual use, the feed hopper of the above injection molding machine does not have a screw pushing mechanism. In actual use, when the diameter of the feed hopper is small, it is easy to occur blockage, and when the diameter is large, it is easy to have problems of inconvenient discharge control. Even if the feeding screw of the existing technology is directly assembled, there will also be a phenomenon of raw material caking in the feed hopper. Therefore, we propose a screw pushing mechanism for an injection molding machine. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a screw pushing mechanism for an injection molding machine. By setting a screw pushing assembly, it is convenient to utilize the cooperation of the screw pushing spiral blade and the screw rod body to achieve uniform feeding. At the same time, the use of a crushing roller can avoid the phenomenon of raw material caking in the feed hopper, and the cooperation of the scraper and the elastic component can fully scrape the raw materials adhered to the inner wall surface of the feed hopper.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A screw pushing mechanism for an injection molding machine, including an injection molding machine body and a feed hopper located on the injection molding machine body. A screw pushing assembly is arranged on the feed hopper. The screw pushing assembly includes:

[0007] A screw rod body, which is rotatably arranged inside the feed hopper;

[0008] A crushing roller, which is fixedly connected to one side of the top of the screw rod body and is used for crushing the caked raw materials;

[0009] A connecting frame, which is fixedly connected to the other side of the top of the screw rod body, and a scraper is arranged on one side of the connecting frame, and the scraper is used for scraping the raw materials adhered to the inner wall surface of the feed hopper;

[0010] The screw pushing spiral blade is fixedly connected to the middle of the screw rod body, and the screw pushing spiral blade is used for uniform feeding.

[0011] Preferably, the scraper includes a connecting plate and two scraping blades fixedly connected to the side of the connecting plate, and the cross-sectional profile of the scraping blade is arc-shaped.

[0012] Preferably, the number of the crushing rollers is set to be multiple, the overall profile of the crushing rollers is set to be a continuous S shape, and the cross-sectional profile of the crushing rollers is set to be rhombic.

[0013] Preferably, the connecting frame includes two connecting rods fixedly connected to the outer surface of the screw rod body and a fixing plate fixedly connected to one ends of the two connecting rods.

[0014] Preferably, the feed hopper is composed of a collecting hopper, a feed cylinder fixedly connected to the bottom end of the collecting hopper, and a feed nozzle fixedly connected to the bottom end of the feed cylinder. The screw pushing spiral blade is located inside the feed cylinder. The crushing rollers and the scraper are located inside the collecting hopper. A motor is fixedly connected to one end of the screw rod body passing through the feed hopper.

[0015] Preferably, a plurality of stirring rods are fixedly connected to the bottom end of the screw rod body, and the stirring rods are located inside the feed nozzle.

[0016] Preferably, an elastic component is arranged between the connecting frame and the scraper. The elastic component includes a fixing rod inserted into the end of the fixing plate, a compression spring sleeved on the outer surface of the fixing rod, and a limiting nut threadedly connected to one end of the fixing rod. The other end of the fixing rod is fixedly connected to the outer surface of the scraper.

[0017] The technical effects and advantages of the present utility model:

[0018] The screw rod body drives the crushing rollers to rotate, thereby crushing the agglomerated raw materials accumulated in the feed hopper, avoiding the blockage of the feed hopper caused by the agglomerated raw materials. At the same time, the screw rod body also drives the connecting frame and its scraper to rotate. The scraper scrapes the raw materials adhered to the inner wall surface of the feed hopper, avoiding the phenomenon of raw material waste. At the same time, the screw rod body also drives the screw pushing spiral blade to rotate, thereby achieving the purpose of uniform feeding. This design facilitates the use of the cooperation between the screw pushing spiral blade and the screw rod body to achieve uniform feeding. At the same time, the use of the crushing rollers can avoid the phenomenon of raw material agglomeration in the feed hopper. And the cooperation between the scraper and the elastic component can fully scrape the raw materials adhered to the inner wall surface of the feed hopper. Brief Description of the Drawings

[0019] Figure 1 is a schematic three-dimensional structure diagram of the present utility model.

[0020] Figure 2 is a schematic structure diagram of the feed hopper of the present utility model.

[0021] Figure 3 This is a partially enlarged structural schematic diagram of part A in the second soil of the present utility model.

[0022] Figure 4 This is a structural schematic diagram of the scraper of the present utility model.

[0023] Figure 5 This is a cross-sectional structural schematic diagram of the crushing roller of the present utility model.

[0024] In the figure: 1, the injection molding machine body; 2, the feed hopper; 201, the aggregate hopper; 202, the feed cylinder; 203, the feed nozzle; 3, the screw rod body; 4, the crushing roller; 5, the connecting frame; 501, the connecting rod; 502, the fixing plate; 6, the scraper; 601, the connecting plate; 602, the scraping blade; 7, the elastic component; 701, the fixing rod; 702, the compression spring; 703, the limit nut; 8, the screw pushing spiral blade; 9, the stirring rod; 10, the motor. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] The present utility model provides as Figures 1-5The screw pushing mechanism of an injection molding machine shown in the figure includes an injection molding machine body 1 and a feed hopper 2 located on the injection molding machine body 1. A screw pushing assembly is provided on the feed hopper 2. The screw pushing assembly includes: a screw rod body 3, which is rotatably arranged inside the feed hopper 2; a crushing roller 4, which is fixedly connected to one side of the top of the screw rod body 3, and the crushing roller 4 is used to crush the agglomerated raw materials; a connecting frame 5, which is fixedly connected to the other side of the top of the screw rod body 3, and a scraper 6 is arranged on one side of the connecting frame 5, and the scraper 6 is used to scrape the raw materials adhered to the inner wall surface of the feed hopper 2; a screw pushing spiral blade 8, which is fixedly connected to the middle of the screw rod body 3, and the screw pushing spiral blade 8 is used for uniform feeding; feeding is achieved through the feed port on the feed hopper 2. The raw materials will accumulate above the screw pushing spiral blade 8. Then, the screw rod body 3 drives the crushing roller 4 to rotate, so as to crush the agglomerated raw materials accumulated in the feed hopper 2, avoiding the blockage of the feed hopper 2 caused by the agglomerated raw materials. At the same time, the screw rod body 3 also drives the connecting frame 5 and its scraper 6 to rotate, and the scraper 6 scrapes the raw materials adhered to the inner wall surface of the feed hopper 2, avoiding the phenomenon of raw material waste. At the same time, the screw rod body 3 also drives the screw pushing spiral blade 8 to rotate, so as to achieve the purpose of uniform feeding.

[0027] It should be further noted that the scraper 6 includes a connecting plate 601 and two scraping blades 602 fixedly connected to the side of the connecting plate 601, and the cross-sectional profile of the scraping blade 602 is arc-shaped; the arc-shaped scraping blade 602 presents a shoveling shape, so that the raw materials adhered to the inner wall surface of the feed hopper 2 can be fully scraped off.

[0028] Furthermore, the number of the crushing rollers 4 is set to be multiple. The overall contour of the crushing rollers 4 is set to be a continuous S shape, and the cross-sectional profile of the crushing rollers 4 is set to be a rhombus; it is convenient for the crushing rollers 4 to easily break the accumulated and agglomerated raw materials, thereby improving the crushing effect.

[0029] It should be particularly noted that the connecting frame 5 includes two connecting rods 501 fixedly connected to the outer surface of the screw rod body 3 and a fixing plate 502 fixedly connected to one end of the two connecting rods 501; an elastic component 7 is arranged between the connecting frame 5 and the scraper 6. The elastic component 7 includes a fixing rod 701 inserted into the end of the fixing plate 502, a compression spring 702 sleeved on the outer surface of the fixing rod 701, and a limit nut 703 threadedly connected to one end of the fixing rod 701. The other end of the fixing rod 701 is fixedly connected to the outer surface of the scraper 6; when the elastic component 7 is inside the feed hopper 2, the compression spring 702 is in a slightly compressed state, which can make the scraping blade 602 fully fit with the inner wall surface of the feed hopper 2, thereby improving the scraping effect. And at the initial stage of installation, it is also convenient to pass the fixing rod 701 through the compression spring 702, then through the fixing plate 502, and then connect the limit nut 703 to the fixing rod 701, so as to facilitate the rapid assembly of the elastic component 7 and the scraper 6 with the connecting frame 5.

[0030] Furthermore, the feed hopper 2 is composed of a collecting hopper 201, a feed cylinder 202 fixedly connected to the bottom end of the collecting hopper 201, and a feed nozzle 203 fixedly connected to the bottom end of the feed cylinder 202. The screw pushing spiral blade 8 is located inside the feed cylinder 202, the crushing roller 4 and the scraper 6 are located inside the collecting hopper 201, and a motor 10 is fixedly connected to one end of the screw rod body 3 passing through the feed hopper 2; a plurality of stirring rods 9 are fixedly connected to the bottom end of the screw rod body 3, and the stirring rods 9 are located inside the feed nozzle 203; the screw rod body 3 drives the stirring rods 9 to rotate, so as to avoid blockage at the feed nozzle 203. At the same time, the raw materials are mainly accumulated at the collecting hopper 201, and the raw materials agglomerated are crushed by the crushing roller 4. The scraper 6 scrapes the raw materials adhered to the inner wall surface of the collecting hopper 201, and the feed cylinder 202 cooperates with the screw pushing spiral blade 8 to achieve uniform feeding.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw pushing mechanism of an injection molding machine, comprising an injection molding machine body (1) and a feed hopper (2) located on the injection molding machine body (1), characterized in that: The feed hopper (2) is provided with a screw pushing assembly, and the screw pushing assembly comprises: A screw rod body (3), wherein the screw rod body (3) is rotatably disposed inside the feed hopper (2); A crushing roller (4), wherein the crushing roller (4) is fixedly connected to one side of the top of the screw rod body (3), and the crushing roller (4) is used to crush the agglomerated raw materials; A connecting frame (5), the connecting frame (5) is fixedly connected to the other side of the top of the screw rod body (3), and a scraper (6) is provided on one side of the connecting frame (5), and the scraper (6) is used to scrape off the raw materials adhered to the inner wall surface of the feed hopper (2); The screw pushes the spiral blade (8), which is fixedly connected to the middle part of the screw rod body (3), and the screw pushes the spiral blade (8) for uniform feeding.

2. The screw pushing mechanism of an injection molding machine according to claim 1, characterized in that: The scraper (6) comprises a connecting plate (601) and two scrapers (602) fixedly connected to the sides of the connecting plate (601), and the cross-sectional profile of the scrapers (602) is arc-shaped.

3. The screw pushing mechanism of an injection molding machine according to claim 1, characterized in that: The number of the crushing rollers (4) is set to be multiple, the overall profile of the crushing roller (4) is set to be a continuous S-shape, and the cross-sectional profile of the crushing roller (4) is set to be a prismatic shape.

4. The screw pushing mechanism of an injection molding machine according to claim 1, characterized in that: The connecting frame (5) comprises two connecting rods (501) fixedly connected to the outer surface of the screw rod body (3) and a fixing plate (502) fixedly connected to one end of the two connecting rods (501).

5. The screw pushing mechanism of an injection molding machine according to claim 1, characterized in that: The feed hopper (2) is composed of a collecting hopper (201), a feed barrel (202) fixedly connected to the bottom end of the collecting hopper (201), and a feed nozzle (203) fixedly connected to the bottom end of the feed barrel (202); the screw pushing spiral blade (8) is located inside the feed barrel (202); the crushing roller (4) and the scraper (6) are located inside the collecting hopper (201); and the screw rod body (3) passes through one end of the feed hopper (2) and is fixedly connected to a motor (10).

6. The screw pushing mechanism of an injection molding machine according to claim 5, characterized in that: A plurality of stirring rods (9) are fixedly connected to the bottom end of the screw rod body (3), and the stirring rods (9) are located inside the feed nozzle (203).

7. The screw pushing mechanism of an injection molding machine according to claim 4, characterized in that: An elastic component (7) is provided between the connecting frame (5) and the scraper (6), and the elastic component (7) comprises a fixing rod (701) plugged into the end of the fixing plate (502), a compression spring (702) sleeved on the outer surface of the fixing rod (701), and a limit nut (703) threadedly connected to one end of the fixing rod (701), and the other end of the fixing rod (701) is fixedly connected to the outer surface of the scraper (6).

Images