Modified plastic forming device

Abstract

The modified plastic forming device comprises a machine body, the machine body comprises a discharging device, an injection molding device and a mold, the discharging device is arranged at the top of the right end of the injection molding device, and the mold is arranged at the left end of the injection molding device. The discharging device comprises an outer shell, an inner shell, a preheating pipe, a feeding port, a sealing cover, a motor, a plastic particle stirring shaft and a discharging pipe, the outer shell of the discharging device is divided into the outer shell and the inner shell, the preheating pipe is located between the outer shell and the inner shell, the feeding port is formed in the top of the discharging device, the sealing cover is arranged on the feeding port, and the motor is arranged on the discharging pipe. A motor is installed in the center of the top of the discharging device, a plastic particle stirring shaft is arranged in the discharging device, the top of the plastic particle stirring shaft is connected with the output end of the motor, and a discharging pipe is arranged at the bottom of the discharging device and connected with the injection molding device. According to the utility model, the mixing uniformity during processing and forming of modified plastics is improved, the qualification rate of the modified plastics is improved, and the problems of low melting speed and the like are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic molding, and particularly relates to a modified plastic molding device. Background Art

[0002] Modified plastics refer to plastics that have been processed and modified based on general-purpose plastics and engineering plastics to have more superior properties such as flame retardancy, impact resistance, high toughness, and easy processing. Common modified plastics include: PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), ABS (styrene-acrylonitrile-butadiene copolymer), nylon (PA), PC (polycarbonate), etc. When two or more plastics are modified by blending, if the plastics are not mixed evenly during the molding process, the molding waste rate will increase, resulting in material waste; and the modified plastics take too long to heat and melt, resulting in the injection tube being too long. After the specified number of processes are completed, a large amount of molten plastic will accumulate in the injection tube, causing waste.

[0003] The utility model patent with the publication number CN214982637U discloses a modified plastic molding device, including a workbench, a mold cavity is provided at one end of the workbench, and a mixing device is provided at the other end. The mixing device includes a mixing box, a feeding hopper is provided at the top of the mixing box, and a stirring shaft is provided in the mixing box. The top end of the stirring shaft extends out of the mixing box and is transmission-connected to a motor, and a stirring rod is provided on the stirring shaft. A heating layer is provided in the mixing box, and a discharge pipe is connected to the bottom of the mixing box, and a discharge valve is provided on the discharge pipe. An extrusion device is provided above the mold cavity, and a cooling device is provided outside the mold cavity. A weighing sensor is provided at the bottom of the mold cavity, and a push plate is provided at the top of the weighing sensor. The push plate is slidably connected to the mold cavity, and a first cylinder is provided below the mold cavity. The cooling device includes a cooling cavity, which is placed outside the mold cavity. The top of the cooling cavity is connected to a water inlet pump through a pipeline, and the bottom is connected to a drainage pump through a pipeline. The water inlet end of the water inlet pump is connected to the water inlet tank through a pipeline, and the drainage end of the drainage pump is connected to the drainage tank through a pipeline. The utility model has a simple structure and is easy to operate. It can quickly cool down the modified plastic after molding, has high production efficiency, is easy to demould, and can control the weight of the modified plastic, with high production accuracy. However, the plastic is heated by the heating layer and stirred by the stirring shaft, resulting in the plastic particles stirred by the stirring shaft being in a molten state, so that a layer of plastic film will adhere to the outer surface of the stirring shaft after cooling, which will be difficult to clean after use. Utility Model Content

[0004] The utility model aims to provide a modified plastic molding device, which improves the mixing uniformity of the modified plastic during processing and molding, improves the qualified rate of the modified plastic, and solves the problems of slow melting speed.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A modified plastic molding device comprises a body, the body comprising a feeding device, an injection molding device, and a mold, the feeding device is arranged at the top of the right end of the injection molding device, and the mold is arranged at the left end of the injection molding device, the feeding device comprises an outer shell, an inner shell, a preheating tube, a feed port, a sealing cover, a motor, a plastic pellet stirring shaft, and a discharge pipe, the outer shell of the feeding device is divided into an outer shell and an inner shell, the preheating tube is located between the outer shell and the inner shell, a feed port is opened at the top of the feeding device, a sealing cover is arranged on the feed port, a motor is installed at the top center of the feeding device, a plastic pellet stirring shaft is arranged inside the feeding device, the top of the plastic pellet stirring shaft is connected to the output end of the motor, and a discharge pipe is opened at the bottom of the feeding device to connect with the injection molding device.

[0007] Preferably, the preheating tube is a spiral structure, an electric heating tube, and the heating temperature is lower than 100°C.

[0008] Preferably, the injection molding device includes an injection molding tube, a heating element, a pushing screw, and a driving device. The injection molding tube is horizontal, and the top of the right end is vertically connected to the discharge pipe. Multiple groups of heating elements are arranged on the outer side of the circumference of the injection molding tube, and a coaxial pushing screw is arranged inside the injection molding tube. The pushing screw provides rotational power through the driving device at the right end.

[0009] Preferably, the injection molding device includes an injection molding tube, a heating element, a pushing screw, and a driving device. The injection molding tube is horizontal, and the top of the right end is vertically connected to the discharge pipe. Multiple groups of heating elements are arranged on the outer side of the circumference of the injection molding tube, and a coaxial pushing screw is arranged inside the injection molding tube. The pushing screw provides rotational power through the driving device at the right end.

[0010] Preferably, the mold includes a fixed mold, a movable mold, a hydraulic cylinder, a guide rod, a plastic spraying tube, and a cavity. A corresponding movable mold is arranged at the left end of the fixed mold. The hydraulic cylinder is located on the left side of the movable mold. The movable mold is moved horizontally through the guide rod. A plastic spraying tube runs through the center of the fixed mold. The right end of the plastic spraying tube is connected to the injection molding tube. A cavity is opened on the right side of the movable mold.

[0011] Preferably, the temperature range of the heating element is 100-260°C.

[0012] Preferably, the outer wall of the discharge pipe is provided with a preheating element, which has the same structure as the heating element and the same heating range.

[0013] Preferably, a melting stirring shaft is arranged in the discharge pipe, a connector is integrally formed on the top of the melting stirring shaft, and the connector is coaxially connected to the bottom of the plastic pellet stirring shaft through a tensioning bolt.

[0014] Preferably, the outer surface of the melt stirring shaft is processed with Teflon coating.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1) The plastic pellet stirring shaft can stir the blended plastic pellets to make the blending more uniform, improve the qualified rate of modified plastics, and reduce material waste. In addition, the preheating tube can preheat the plastic pellets in the feeding device, reduce the subsequent injection molding tube heating time, and improve production efficiency;

[0017] 2) The preheating element can make the modified plastic melt in advance before entering the injection tube, which can further reduce the heating length of the injection tube to reduce the overall length of the machine body, and change the floor space of the machine body, making the machine body structure more compact and easy to place;

[0018] 3) The molten stirring shaft stirs the modified plastic in the discharge pipe of the preheating element, which further improves the uniformity of the modified plastic and the qualified rate of the modified plastic finished products. In addition, the outer side of the molten stirring shaft is Teflon-coated, which is non-stick and saves the time for cleaning the molten stirring shaft when the machine is shut down. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model;

[0020] Figure 2 This is a cross-sectional view of the practical feeding device;

[0021] Figure 3 yes Figure 1 Sectional view;

[0022] Figure 4 is a cross-sectional view of the location of the preheating element of Example 2;

[0023] Figure 5 is a cross-sectional view of the melt stirring position of Example 3;

[0024] Figure 6 yes Figure 5 A magnified view of middle;

[0025] Icons: 1. Feeding device; 2. Injection molding device; 3. Mold; 4. Outer shell; 5. Inner shell; 6. Preheating tube; 7. Feed inlet; 8. Sealing cap; 9. Motor; 10. Plastic pellet stirring shaft; 11. Discharge pipe; 12. Injection molding tube; 13. Heating element; 14. Push screw; 15. Driving device; 16. Fixed mold; 17. Movable mold; 18. Hydraulic cylinder; 19. Guide rod; 20. Spraying tube; 21. Cavity; 22. Preheating element; 23. Melt stirring shaft; 24. Connector; 25. Tensioning bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose, method scheme and advantages of the embodiments of the utility model clearer, the method scheme in the embodiments of the utility model is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Example 1

[0028] like Figure 1-3 As shown, a modified plastic molding device includes a body, the body includes a feeding device 1, an injection molding device 2, and a mold 3. The feeding device 1 is arranged at the top of the right end of the injection molding device 2. The feeding device 1 includes an outer shell 4, an inner shell 5, a preheating tube 6, a feed inlet 7, a cover 8, a motor 9, a plastic pellet stirring shaft 10, and a discharge pipe 11. The outer shell of the feeding device 1 is divided into an outer shell 4 and an inner shell 5. The preheating tube 6 is located between the outer shell 4 and the inner shell 5 to mix the mixed plastic in the feeding device 1. The material is preheated to reduce the heating time of the injection molding device 2. A feed port 7 is provided on the top of the feeding device 1, and a cover 8 is provided on the feed port 7. A motor 9 is installed at the top center of the feeding device 1. A plastic pellet stirring shaft 10 is provided inside the feeding device 1. The top of the plastic pellet stirring shaft 10 is connected to the output end of the motor 9. The stirring shaft 10 can stir the blended plastic and accelerate the mixing of the blended plastic. A discharge pipe 11 is provided at the bottom of the feeding device 1 to connect with the injection molding device 2.

[0029] Furthermore, the injection molding device 2 includes an injection molding tube 12, a heating element 13, a pushing screw 14, and a driving device 15. The injection molding tube 12 is horizontal, and the top of the right end is vertically connected to the discharge pipe 11. Multiple groups of heating elements 13 are arranged on the outer side of the circumference of the injection molding tube 12. The heating element 13 is electrically heated and can heat the modified plastic in the injection molding tube 12 into a molten state. A coaxial pushing screw 14 is arranged inside the injection molding tube 12. The pushing screw 14 is provided with rotational power through the driving device 15 at the right end. The driving device 15 drives the pushing screw 14 to rotate through the motor and the gear set transmission, which plays a role in pushing and feeding the modified plastic in the injection molding tube 12.

[0030] Furthermore, a mold 3 is provided at the left end of the injection molding device 2, and the mold 3 includes a fixed mold 16, a movable mold 17, a hydraulic cylinder 18, a guide rod 19, a spray-molding tube 20, and a cavity 21. The left end of the fixed mold 16 is provided with a corresponding movable mold 17, and the hydraulic cylinder 18 is located on the left side of the movable mold 17. The movable mold 17 is horizontally moved through the guide rod 19. A spray-molding tube 20 passes through the center of the fixed mold 16, and the right end of the spray-molding tube 20 is connected to the injection molding tube 12. A cavity 21 is opened on the right side of the movable mold 17. The molten modified plastic extruded through the spray-molding tube 20 enters the cavity 21 for shaping, and the molding and blanking are completed in the cavity 21 after cooling.

[0031] Furthermore, the preheating tube 6 is a spiral structure and an electric heating tube. Since the temperature of commonly used modified plastics in a molten state is 100-260°C, the preheating tube 6 is heated at a temperature lower than 100°C, so that the blended plastic particles will not form a molten state, and the plastic particles will not stick together when the stirring shaft 10 stirs them. The temperature range of the heating element 13 is 100-260°C, and the temperature is adjusted according to the material of the plastic to meet the requirements of various commonly used modified plastics to form a melt.

[0032] In the specific implementation process, the plastics blended in proportion are added from the feed port 7, the motor 9 is started, and the stirring shaft stirs the blended plastics evenly, the preheating tube 6 heats the inside of the feeding device 1, so that the temperature of the blended plastics is close to 100°C, and the critical plastics are in a molten state, the motor in the driving device 15 is started to drive the push screw 14 to feed the blended plastics through the discharge pipe 11 into the injection tube 12, the heating element 13 in the injection tube 12 is heated, the blended plastics are in a molten state, and are squeezed into the spray tube 20 by the push screw 14, and then enter the cavity 21 to form a modified plastic molded part, the hydraulic cylinder 18 drives the movable mold 17 to the left to leave the fixed mold 16, and the modified plastic molded part falls after cooling, completing the modified plastic molding process. Through the action of the preheating tube 6, the heating and melting time of the blended plastics in the injection tube 12 is reduced, the molding of the modified plastics is accelerated, and the production efficiency is improved. The uniformity of the plastic stirring is also enhanced through the plastic pellet stirring shaft 10, so that the finished product rate of the modified plastics is improved.

[0033] Example 2

[0034] In order to reduce the length of the machine body and reduce the occupied space, improvements are made on the basis of Example 1, such as Figure 4 As shown, in this embodiment, a pre-heating element 22 is provided on the outer wall of the discharge pipe 11, which has the same structure as the heating element 13 and the same heating range.

[0035] During the specific implementation process, the blended plastic is heated and melted in advance through the vertical discharge pipe 11, and the height of the discharge pipe 11 is lengthened to shorten the length of the injection tube 12. This can shorten the overall length of the machine body and change the space occupied by the machine body, making the machine body structure more compact and easy to place.

[0036] Example 3

[0037] In order to make the blended plastics in the molten state more evenly mixed and reduce the subsequent stirring and cleaning work, the following improvements are made on the basis of Example 2, such as Figure 5-6 As shown, in this embodiment, a melting stirring shaft 23 is arranged in the discharge pipe 11, and a connector 24 is integrally formed on the top of the melting stirring shaft 23, and the connector 24 is coaxially connected to the bottom of the plastic pellet stirring shaft 10 through a tensioning bolt 25. The outer surface of the melting stirring shaft 23 is processed with a Teflon coating, and the heating range of the preheating element 22 does not exceed 260°C, which is lower than the decomposition temperature of the Teflon coating to avoid toxicity.

[0038] During the specific implementation process, the blended plastics are heated to a molten state in the discharge pipe 11, and the motor synchronously drives the melt stirring shaft 23 to rotate, so that the blended plastics in the molten state are also fully exchanged and mixed evenly, further increasing the mixing degree of the modified plastics to improve the qualified rate of the finished modified plastics. The Teflon coating of the melt stirring shaft 23 is non-stick, which saves the time for cleaning the melt stirring shaft when the machine is shut down.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, 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 modified plastic molding device, comprising a machine body, wherein the machine body comprises a feeding device (1), an injection molding device (2), and a mold (3), wherein the feeding device (1) is arranged at the top of the right end of the injection molding device (2), and the mold (3) is arranged at the left end of the injection molding device (2). It is characterized in that The material discharge device (1) comprises an outer shell (4), an inner shell (5), a preheating tube (6), a feed port (7), a sealing cover (8), a motor (9), a plastic pellet stirring shaft (10), and a discharge pipe (11). The outer shell of the material discharge device (1) is divided into an outer shell (4) and an inner shell (5). The preheating tube (6) is located between the outer shell (4) and the inner shell (5). The top of the material discharge device (1) is provided with a feed port (7). The feed port (7) is provided with a sealing cover (8). The center of the top of the material discharge device (1) is provided with a motor (9). A plastic pellet stirring shaft (10) is provided inside the material discharge device (1). The top of the plastic pellet stirring shaft (10) is connected to the output end of the motor (9). The bottom of the material discharge device (1) is provided with a discharge pipe (11) connected to the injection molding device (2).

2. A modified plastic molding device according to claim 1, It is characterized in that The preheating tube (6) is a spiral structure and an electric heating tube, and the heating temperature is lower than 100°C.

3. A modified plastic molding device according to claim 1, It is characterized in that The injection molding device (2) comprises an injection molding tube (12), a heating element (13), a pushing screw (14), and a driving device (15). The injection molding tube (12) is horizontal, and the top of the right end is vertically connected to the discharge tube (11). Multiple groups of heating elements (13) are arranged on the outer side of the circumference of the injection molding tube (12). A coaxial pushing screw (14) is arranged inside the injection molding tube (12). The pushing screw (14) is provided with rotational power through the driving device (15) at the right end.

4. A modified plastic molding device according to claim 1, It is characterized in that The mold (3) comprises a fixed mold (16), a movable mold (17), a hydraulic cylinder (18), a guide rod (19), a plastic spraying tube (20), and a cavity (21). The left end of the fixed mold (16) is provided with a corresponding movable mold (17). The hydraulic cylinder (18) is located on the left side of the movable mold (17) and enables the movable mold (17) to move horizontally through the guide rod (19). A plastic spraying tube (20) runs through the center of the fixed mold (16). The right end of the plastic spraying tube (20) is communicated with the injection molding tube (12). The right side of the movable mold (17) is provided with a cavity (21).

5. A modified plastic molding device according to claim 3, It is characterized in that The temperature range of the heating element (13) is 100-260°C.

6. A modified plastic molding device according to claim 5, It is characterized in that The outer wall of the discharge pipe (11) is provided with a preheating element (22), which has the same structure as the heating element (13) and the same heating range.

7. A modified plastic molding device according to claim 6, It is characterized in that A melting stirring shaft (23) is arranged in the discharge pipe (11), and a connecting head (24) is integrally formed on the top of the melting stirring shaft (23). The connecting head (24) is coaxially connected to the bottom of the plastic pellet stirring shaft (10) via a tensioning bolt (25).

8. A modified plastic molding device according to claim 7, It is characterized in that The outer surface of the melting stirring shaft (23) is processed with a Teflon coating.

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