Plastic product injection molding equipment

Abstract

The utility model discloses injection molding equipment for plastic products, which relates to the technical field of processing equipment and comprises an extrusion barrel, a charging basket is arranged on the extrusion barrel, a feeding nozzle is arranged at one end of the top of the charging basket, a discharging pipe is arranged at the bottom of the charging basket, a feeding port is formed in the position, located on the discharging pipe, of the extrusion barrel, and a discharging port is formed in the discharging pipe. When the edge of the inner wall of the discharging pipe is blocked, a motor works to drive a lead screw to rotate, an inner threaded barrel in threaded connection with the lead screw and a sliding rod in sliding connection with a sliding rod can drive a pressing plate to ascend and descend through an L-shaped rod, the pressing plate can be inserted into the discharging pipe after descending, and the discharging pipe is inserted into the discharging pipe. And the blocked materials are pushed into the extrusion barrel after penetrating through the feeding port, the materials are taken away along with conveying of the materials driven by the auger in the extrusion barrel, then the motor rotates reversely to drive the material pressing plate to rise to the end, away from the discharging pipe, in the material barrel, and next discharging is waited, so that the blocked materials on the inner wall of the discharging pipe can be pushed out, and the discharging efficiency is improved. And the problem of blanking quantity reduction caused by blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of processing equipment, in particular to a plastic product injection molding device. Background Art

[0002] The process of plastic injection molding involves several key steps, including:

[0003] Raw material preparation: Select suitable plastic raw materials and carry out pre-treatment such as drying, mixing, dyeing, etc. for use;

[0004] Mold design: Design a suitable injection mold according to the shape and size of the product, including mold structure, size, number of cavities and other parameters;

[0005] Mould manufacturing: manufacture injection moulds according to design drawings, including cutting, processing, heat treatment, assembly, etc.

[0006] Injection molding machine debugging: Add the prepared plastic raw materials into the injection molding machine's feeding hopper, preheat, melt and adjust the melt flow rate to ensure the stability and uniformity of the plastic melt during the injection process;

[0007] Mold installation: Install the designed injection mold on the injection molding machine, perform docking and debugging between the mold and the injection molding machine, and adjust parameters such as mold opening and closing force, mold temperature and mold pressure;

[0008] Melting and plasticizing: Plastic particles are fed into the injection barrel through the hopper and melted into a uniform melt under the rotation of the screw and the action of the heating element;

[0009] Injection molding: When the melt reaches the predetermined pressure and temperature, it is quickly pushed forward by the screw and injected into the mold cavity through the nozzle to fill and mold;

[0010] Pressure-maintaining cooling: After the melt fills the cavity, continue to apply pressure and maintain it for a period of time, while cooling medium is passed through the mold to gradually cool and solidify the plastic into the desired shape;

[0011] Demoulding and ejection: When the plastic product cools and hardens to a sufficient strength, the mould is opened and the product is ejected from the mould using a device such as an ejector pin or a cylinder.

[0012] Quality inspection: Conduct preliminary appearance and size inspection on ejected products and remove defective products;

[0013] Post-processing: If necessary, carry out subsequent processing steps such as trimming, grinding, and assembly;

[0014] Finished product processing: The finished products are processed, such as removing residual impurities, trimming burrs, cleaning, inspection, etc., and finally the finished products are packaged for storage or transportation.

[0015] In the process of implementing the solution, the inventors found that the following problems in the prior art have not been well solved: in the melt plasticization step, the particles are in a discharge hopper, a discharge pipe is connected to the bottom of the discharge hopper, and an inlet is provided at the position of the extruder located at the discharge pipe. Since the extrusion barrel contains a certain heat temperature, the particles are cold, and the particles are located at the bottom area of ​​the discharge pipe. The heat of the extrusion barrel will cause the particles to melt. After melting, they will adhere to the tube wall. Then the discharge hopper contains a conveying dragon, but the outer wall of the dragon's blades will not touch the inner wall of the discharge pipe. There is a certain distance between the two, and the melted particles will form a blockage at the distance, resulting in a problem of reduced discharge volume. Utility Model Content

[0016] The main purpose of the utility model is to provide a plastic product injection molding device, which can effectively solve the problems in the background technology.

[0017] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0018] A plastic product injection molding device comprises an extrusion barrel, wherein the extrusion barrel is provided with a material barrel, a feed nozzle is provided at one end of the top of the material barrel, a feed tube is provided at the bottom of the material barrel, an inlet is drilled on the extrusion barrel at the position of the feed tube, the feed tube is communicated with the extrusion barrel through the inlet, a screw rod is provided at one end inside the material barrel, a sliding rod is provided at the other end inside the material barrel, an inner threaded barrel is threadedly connected to the outer wall of the screw rod, a sliding barrel is slidably connected to the outer wall of the sliding rod, a pressure plate is provided inside the extrusion barrel between the screw rod and the sliding rod, L-shaped rods are fixed at both ends of the top of the pressure plate, and a motor is provided at the top of the screw rod.

[0019] Preferably, the internal threaded cylinder and the sliding cylinder are respectively fixedly connected to the top of the L-shaped rod at a close position.

[0020] Preferably, the output end of the motor is fixedly connected to the top of the screw rod.

[0021] Preferably, a gantry is fixed to the top outer wall of the barrel, the motor is installed on the inner top of the gantry, the bottom of the screw rod is rotatably connected to the inner wall of the discharge pipe, the bottom of the slide rod is fixedly connected to the inner wall of the discharge pipe, and the top of the slide rod is fixedly connected to the inner top of the gantry.

[0022] Preferably, a central cavity is bored through the position of the pressing plate between the L-shaped rods, and the outer diameter of the pressing plate matches the inner diameter of the feed inlet and the feed tube, respectively.

[0023] Preferably, the height distance of the L-shaped rod is greater than the distance between the bottom of the screw rod and the bottom of the discharge pipe.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] When material blockage occurs at the edge of the inner wall of the feeding tube, the motor drives the screw rod to rotate after it starts working. The internal threaded barrel connected to the screw rod and the sliding rod slidably connected to the sliding rod can drive the pressing plate to rise and fall through the L-shaped rod. After descending, the pressing plate can be inserted into the feeding tube, and the blocked material is pushed into the inside of the extruder barrel after passing through the feed inlet, and is taken away along with the transmission of the material driven by the dragon in the extruder barrel. Then the reverse rotation of the motor drives the pressing plate to rise to the end of the barrel away from the feeding tube, waiting for the next discharge. In this way, the material blocked on the inner wall of the feeding tube can be pushed out, thus avoiding the problem of reduced feeding volume caused by blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a plastic product injection molding device of the utility model;

[0027] Figure 2 This is a schematic diagram of the separation structure of the material barrel and the extrusion barrel of a plastic product injection molding equipment after the gantry is removed;

[0028] Figure 3 It is a structural schematic diagram of a material barrel and a material discharge pipe of a plastic product injection molding device of the utility model, when the pressing plate is not lowered after being cut away;

[0029] Figure 4 The utility model is a schematic structural diagram of a material barrel and a feed tube of a plastic product injection molding device after the pressure plate is lowered after the section view.

[0030] In the figure: 1. extrusion barrel; 11. feed port; 2. barrel; 21. feed pipe; 3. feed nozzle; 4. gantry; 5. motor; 51. screw rod; 52. internal thread barrel; 6. slide rod; 61. slide barrel; 7. L-shaped rod; 8. press plate; 9. center cavity. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figure 1-4As shown, a plastic product injection molding equipment includes an extrusion barrel 1, on which is a material barrel 2, a feed nozzle 3 is provided at one end of the top of the material barrel 2, a feed pipe 21 is provided at the bottom of the material barrel 2, and an inlet 11 is drilled at the position of the feed pipe 21 in the extrusion barrel 1, and the feed pipe 21 is communicated with the extrusion barrel 1 through the inlet 11, a screw rod 51 is provided at one end of the interior of the material barrel 2, and a slide rod 6 is provided at the other end of the interior of the material barrel 2, the outer wall of the screw rod 51 is threadedly connected with an internal threaded tube 52, and the outer wall of the slide rod 6 is slidably connected with a slide tube 61, and a pressing plate 8 is provided inside the extrusion barrel 1 located between the screw rod 51 and the slide rod 6, and L-shaped rods 7 are fixed at both ends of the top of the pressing plate 8, and a motor 5 is provided at the top of the screw rod 51.

[0033] Specifically, the internal threaded cylinder 52 and the sliding cylinder 61 are respectively fixedly connected to the top of the L-shaped rod 7 at a close position.

[0034] Specifically, the output end of the motor 5 is fixedly connected to the top of the screw rod 51 .

[0035] Specifically, a gantry 4 is fixed to the top outer wall of the barrel 2, the motor 5 is installed on the inner top of the gantry 4, the bottom of the screw rod 51 is rotatably connected to the inner wall of the discharge pipe 21, the bottom of the slide rod 6 is fixedly connected to the inner wall of the discharge pipe 21, and the top of the slide rod 6 is fixedly connected to the inner top of the gantry 4.

[0036] Specifically, a central cavity 9 is bored through the position of the pressing plate 8 between the L-shaped rods 7. The outer diameter of the pressing plate 8 matches the inner diameter of the feed inlet 11 and the discharge pipe 21, respectively, and the blocked material can be accurately pushed out of the discharge pipe 21. The central cavity 9 is reserved for the bottom rotation and feeding of the dragon in the discharge pipe 21, so that the lifting and lowering of the pressing plate 8 will not affect the feeding rotation of the dragon.

[0037] Specifically, the height of the L-shaped rod 7 is greater than the distance between the bottom of the screw rod 51 and the bottom of the feed tube 21 , so that the pressing plate 8 can pass through the feed inlet 11 and then be inserted down to the inner top of the extrusion cylinder 1 .

[0038] Working principle:

[0039] When material blockage occurs at the edge of the inner wall of the feeding tube 21, the motor 5 drives the screw rod 51 to rotate after it starts working. The internal threaded tube 52 threadedly connected to the screw rod 51 and the slide rod 6 slidably connected on the slide rod 6 can drive the pressing plate 8 to rise and fall through the L-shaped rod 7. After descending, the pressing plate 8 can be inserted into the feeding tube 21, and push the blocked material into the interior of the extrusion tube 1 after passing through the feed inlet 11, and take it away along with the transmission of the material driven by the dragon in the extrusion tube 1. Then the reverse rotation of the motor 5 drives the pressing plate 8 to rise to the end of the barrel 2 away from the feeding tube 21, waiting for the next discharge. In this way, the material blocked on the inner wall of the feeding tube 21 can be pushed out, avoiding the problem of reduced feeding volume due to blockage.

[0040] The circuits, electronic components and control modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to software and methods.

[0041] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A plastic product injection molding device, comprising an extrusion barrel (1), characterized in that: The extrusion barrel (1) is provided with a material barrel (2), a feed nozzle (3) is provided at one end of the top of the material barrel (2), a feed pipe (21) is provided at the bottom of the material barrel (2), an inlet (11) is drilled in the extrusion barrel (1) at the position of the feed pipe (21), the feed pipe (21) is communicated with the extrusion barrel (1) through the inlet (11), a screw rod (51) is provided at one end inside the material barrel (2), a slide rod (6) is provided at the other end inside the material barrel (2), an outer wall of the screw rod (51) is threadedly connected to an internal threaded cylinder (52), an outer wall of the slide rod (6) is slidably connected to a slide rod (61), a pressing plate (8) is provided inside the extrusion barrel (1) between the screw rod (51) and the slide rod (6), L-shaped rods (7) are fixed at both ends of the top of the pressing plate (8), and a motor (5) is provided at the top of the screw rod (51).

2. The plastic product injection molding equipment according to claim 1, characterized in that: The internal threaded cylinder (52) and the sliding cylinder (61) are respectively fixedly connected to the top of the L-shaped rod (7) at adjacent positions.

3. The plastic product injection molding equipment according to claim 1, characterized in that: The output end of the motor (5) is fixedly connected to the top of the screw rod (51).

4. The plastic product injection molding equipment according to claim 1, characterized in that: A gantry (4) is fixed to the top outer wall of the barrel (2), the motor (5) is mounted on the inner top of the gantry (4), the bottom of the screw rod (51) is rotatably connected to the inner wall of the discharge pipe (21), the bottom of the slide rod (6) is fixedly connected to the inner wall of the discharge pipe (21), and the top of the slide rod (6) is fixedly connected to the inner top of the gantry (4).

5. The plastic product injection molding equipment according to claim 1, characterized in that: The holding plate (8) is located between the L-shaped rods (7) and has a central cavity (9) extending therethrough. The outer diameter of the holding plate (8) matches the inner diameter of the feed inlet (11) and the feed tube (21).

6. The plastic product injection molding equipment according to claim 1, characterized in that: The height of the L-shaped rod (7) is greater than the distance between the bottom of the screw rod (51) and the bottom of the feed tube (21).

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