CN110587900A - A waste plastic melting injection molding machine and method thereof - Google Patents

Abstract

The invention relates to a waste plastic melting injection molding machine and a method thereof. It consists of a hopper, a box cover, a hot air circulation box, a melting chamber, a fan, a heating pipe, a stirring mechanism, a screen, a conical hopper, a feeding screw blade, a screw, a barrel, a storage tank, a cylinder, a piston, a barrel, and an injection molding machine. It is composed of mold, nozzle switch valve and frame. The material enters the melting chamber from the hopper, is heated and melted in contact with the hot air, and is stirred by the stirring mechanism to make it heated evenly. Injection molded into molds to produce products directly. The invention has a compact structure design, uses hot air to directly melt waste plastics in the process, does not need to crush and clean waste plastics, reduces processing steps, and finally injects the molten materials directly into finished products, eliminating the process of extrusion, cooling, granulation, and remelting injection molding, saving energy. energy and improve work efficiency.

Description

A waste plastic melting injection molding machine and method thereof

technical field

The invention relates to the technical field of injection molding machines, in particular to a waste plastic melting injection molding machine and a method thereof.

Background technique

The scope of application of plastics is becoming wider and wider, replacing metal, wood, paper, etc. in large quantities. With the widespread use of plastics, a large number of waste plastics appear. . The recycling and utilization of waste plastics and the development of resources are a deep understanding of the environment and resources, and it is a way of life to reduce environmental pollution and waste of resources caused by waste plastics.

The most common way to recycle waste plastics in my country is recycling and granulation. The traditional granulation process is to crush and clean the recycled waste plastics, and then extrude them through screw extruders for granulation. The crushing noise is loud, there is a lot of dust, and sewage is generated during work. cause secondary pollution.

Contents of the invention

(1) Solved technical problems

The purpose of the present invention is to overcome the deficiencies of the prior art. The present invention provides a waste plastic melting injection molding machine and its method. The specific method is that the injection molding machine uses hot air to directly melt waste plastics in the process, eliminating the need for crushing in the traditional process. And cleaning process, reduce operation steps, avoid pollution, and finally inject the molten material directly into the finished product, eliminating the need for extrusion, cooling, granulation and remelting injection molding process, saving energy and improving work efficiency.

(2) Technical solution

The technical solution of the present invention is as follows: the structure of the injection molding machine includes a hopper, a box cover, a hot air circulation box, a melting chamber, a blower fan, a heating pipe, a stirring mechanism, a screen, a conical joint bucket, a feeding screw blade, a barrel, a screw, a storage Cylinders, cylinders, on-off valves, pistons, barrels, injection molds, nozzle on-off valves and racks.

There is a box cover above the injection molding machine, and a welding hopper is fixed above the box cover. The outer wall of the melting chamber is connected to a hot air circulation box, and a stirring mechanism is installed inside, and a conical bucket is connected to the bottom. The shaft is connected, and the bottom of the conical bucket is connected to the machine barrel. There is a screw in the machine barrel, and the machine barrel is connected to the material barrel. There is a piston in the material barrel, and an injection mold is placed at the outlet of the material barrel.

The hot air circulation box includes a hot air circulation box shell, a fan, and a heating pipe. The fan is symmetrically installed in the circulation box shell, and there is a heating pipe below the fan. Two fans are symmetrically arranged to recycle the hot air in the melting room, and the heat is supplemented through the heating pipe, which can effectively heat and melt the material, increase work efficiency, and effectively save energy.

The injection molding system of the injection molding machine includes a screw, a machine barrel, a storage tank, an air cylinder, a switch valve, a piston, a barrel, an injection mold and a nozzle switch valve.

There is a screw in the barrel of the injection molding machine, and the barrel is connected to the material storage cylinder. There is an air cylinder next to the material storage cylinder. The bottom of the material storage cylinder is connected to the material cylinder. There is a nozzle switch valve at the outlet of the barrel, and the outlet of the barrel is connected with the injection mold.

The waste plastic enters the melting chamber from the hopper, and is heated and melted in contact with the hot air. The stirring mechanism stirs the material to make it heated and melted. The molten plastic melt enters the machine barrel through the conical hopper, and is conveyed to the storage tank by screw extrusion. At a certain stage, open the on-off valve to deliver to the barrel, then close the on-off valve, and inject it into the mold from the piston through the nozzle on-off valve.

When the switch valve is closed, the cylinder next to the storage tank can push the piston in the cylinder to form air pressure when feeding. When the switch valve is opened, the air pressure is released to push the melt into the barrel smoothly. The on-off valve controls the material feeding in the barrel and is controllable during work.

The outside of the machine barrel and material barrel is pasted with a heating resistance device and a heat insulation device to ensure the temperature of the melt during transportation and prevent solidification.

(3) Beneficial effects

The advantages of the present invention are: the design of the present invention is compact, the waste plastics are directly melted by hot air, the melted plastics are extruded and transported into the barrel by the screw, and injected into the injection mold through the piston, and the recovered plastics do not need to be crushed. Therefore, the generation of noise and dust is avoided, and the working environment is improved; the hot air is recycled, and there is no discharge of waste water and waste gas, which is environmentally friendly. At the same time, the plastic melt is directly injected into the finished product, eliminating the need for extrusion, cooling, granulation, and then melting and injection molding, saving energy and improving work efficiency.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the waste plastic melting injection molding machine of the present invention;

In the figure, 1-1 is the stirring transmission mechanism, 1-2 is the hopper, 1-3 is the melting chamber, 1-4 is the stirring mechanism, 1-5 is the fan, 1-6 is the screen, 1-7 is the heating pipe, 2-1 is the feeding screw blade, 2-2 is the conical bucket, 3-1 is the cylinder, 3-2 is the storage tank, 3-3 is the switch valve, 3-4 is the injection mold, 3-5 is the nozzle switch Valve, 3-6 is the plastic melt, 3-7 is the barrel, 3-8 is the barrel, 3-9 is the screw, 3-10 is the piston, 3-11 is the frame;

Figure 2 and Figure 3 are schematic diagrams of the overall structure of another simplified waste plastic melting injection molding machine that removes the storage tank;

In the figure, 4-1 is the barrel, 4-2 is the screw, 4-3 is the injection mold, 4-4 is the barrel, 4-5 is the piston, 4-6 is the plastic melt, 4-7 is the nozzle switch valve ;

Fig. 4 is another overall structural schematic diagram of a simplified waste plastic melting injection molding machine that removes the barrel screw;

5-1 is a mould, 5-2 is a nozzle switch valve, 5-3 is a plastic melt, 5-4 is a barrel, and 5-5 is a piston.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The overall structure diagram of the waste plastic melting injection molding machine of the present invention is shown in Figure 1, and its structure includes a stirring transmission mechanism 1-1, a hopper 1-2 is installed above the melting chamber 1-3, and the internal wind is heated by a heating pipe 1-7, The circulation is driven by the fan 1-5, the screen 1-6 is below the stirring mechanism 1-4, the cone 2-2 is connected to the bottom of the screen, and there is a feeding screw blade 2-1 inside the cone 3-8, and Material storage cylinder 3-2 is connected, screw rod 3-9 is arranged in machine barrel 3-8, cylinder 3-1 is arranged beside material storage cylinder 3-2, plastic melt 3-6 is arranged in material storage cylinder 3-7, through piston 3 -10, injection into the injection mold 3-4 through the nozzle switch valve 3-5.

The working principle of the present invention: Put the waste plastics from the hopper 1-2, the material passes through the melting chamber 1-3, and the material is stirred by the stirring mechanism 1-4 to make it heated evenly, and the molten material passes through the screen 1-6, the cone The receiving bucket 2-2 enters the machine barrel 3-8, is squeezed by the screw 3-9 and enters the material storage cylinder 3-2, first closes the on-off valve 3-3 to store the material, and then opens the on-off valve 3-3 to enter the material In the barrel 3-7, the on-off valve 3-3 is then closed, and the molten material is injected into the mold 3-4 by the piston 3-10 to generate a product.

Another schematic diagram of the overall structure of a simplified waste plastic melting injection molding machine that removes the storage tank is shown in Figure 2 and Figure 3. There is a screw 4-2 in the structural barrel 4-1 below it, and the barrel 4-1 is connected with the barrel 4-4 are connected, there is a piston 4-5 in the barrel, a nozzle switch valve 4-7 is arranged at the outlet of the barrel 4-4, and the outlet is connected with the injection mold 4-3. The molten material 4-6 is extruded into the barrel 4-4 through the screw 4-2, injected by the piston 4-5, and passed through the nozzle switch valve 4-7 to the injection mold 4-3 to form a product.

Another schematic diagram of the overall structure of a simplified waste plastic melting injection molding machine that removes the barrel and screw is shown in Figure 4: the lower cone is connected to the barrel 5-4, and there is a piston 5-5 in the barrel 5-4. There is a nozzle switch valve 5-2 at the outlet of the 5-4, which is connected with the injection mold 5-1. The molten material 5-3 enters the barrel 5-4 through the feeding screw blade, is injected through the piston 5-5, and the molten material is injected into the injection mold 5-1 through the nozzle switch valve 5-2 to generate a product.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (3)

1. A waste plastic melting injection molding machine and a method thereof, comprising a screw, a machine barrel, a cylinder, a switch valve, a piston, a charging barrel, an injection mold and a nozzle switch valve; the method is characterized in that: a screw is arranged in a cylinder of the injection molding machine, the cylinder is connected with a storage cylinder, an air cylinder is arranged beside the storage cylinder, the lower part of the storage cylinder is connected with a charging barrel, a switch valve is arranged between the storage cylinder and the charging barrel, a piston is arranged in the charging barrel, a nozzle switch valve is arranged at the outlet of the charging barrel, and the outlet is connected with an injection mold;

the waste plastic is contacted with hot air in a melting chamber and is heated and melted, the waste plastic is stirred by a stirring mechanism to be uniformly heated, the melted plastic melt enters a machine barrel, is extruded and conveyed to a storage tank by a screw rod, is stored to a certain stage, is conveyed to a material barrel by opening a switch valve, is closed, and is injected into a mold by a piston through a nozzle switch valve.

2. The waste plastic melting injection molding machine and the method thereof according to claim 1, characterized in that: the cylinder beside the storage cylinder can push a piston in the cylinder to move to form air pressure during feeding under the condition that the switch valve is closed, the air pressure is released when the switch valve is opened for feeding, the melt is pushed to smoothly enter the material barrel, and the switch valve controls the feeding in the material barrel and is controllable during working.

3. The waste plastic melting injection molding machine and the method thereof according to claim 1, characterized in that: the heating resistor device and the heat insulation device are attached to the outer parts of the machine barrel and the material barrel, so that the temperature of the melt during conveying is guaranteed, and solidification is prevented.