Automatic feeding device of plastic injection molding machine

Abstract

The utility model relates to an automatic feeding device of a plastic injection molding machine, which comprises a charging barrel, a waste heat preheating component and a control component, the charging barrel is arranged above the output end of the injection molding machine, the charging barrel is communicated with an inner cavity of the injection molding machine, the charging barrel is provided with a charging cavity, a preheating cavity is formed on the inner side wall of the charging barrel, and an air outlet is formed on the side wall of the charging barrel. The waste heat preheating assembly comprises a communicating pipe and an air pump, one end of the communicating pipe communicates with the middle section of the inner cavity of the injection molding machine, the other end of the communicating pipe communicates with the lower portion of the preheating cavity, and the air pump is located on the communicating pipe and used for pumping hot air in the inner cavity of the injection molding machine into the preheating cavity; the control assembly is used for controlling feeding and discharging between the charging barrel and the output end of the injection molding machine and can guide waste heat in an inner cavity of the injection molding machine into the charging barrel preheating cavity to preheat rice in the charging barrel.

Description

Technical Field

[0001] The utility model belongs to the technical field of feeding equipment for injection molding machines, and particularly relates to an automatic feeding device for a plastic injection molding machine. Background Art

[0002] When the existing injection molding machine operates, the material pellets need to be heated and softened into a liquid before being extruded finally. The material pellets are supplied into the injection molding machine through a feeding device. Generally, a hopper is arranged above the input end of the injection extrusion machine, and then the material pellets are sucked into the hopper through the cooperation of an air pump and an air pipe. The material pellets fall from the hopper into the injection extrusion machine. In the actual operation process, we found that both the current injection molding machine and the feeding equipment for the injection molding machine operate independently in part, and there is no device on the market that can make full use of the waste heat inside the injection molding machine. In view of this, this solution came into being. Content of the Utility Model

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide an automatic feeding device for a plastic injection molding machine, which can introduce the waste heat in the inner cavity of the injection molding machine into the preheating cavity of the hopper to preheat the material pellets in the hopper.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: an automatic feeding device for a plastic injection molding machine, including a hopper, a waste heat preheating component and a control component. The hopper is arranged above the output end of the injection molding machine, and the hopper is communicated with the inner cavity of the injection molding machine. The hopper has a material cavity, and a preheating cavity is formed on the inner side wall of the hopper. An air outlet hole is formed on the side wall of the hopper, and the air outlet hole is communicated with the preheating cavity. The waste heat preheating component includes a connecting pipe and an air extraction pump. One end of the connecting pipe is communicated with the middle section of the inner cavity of the injection molding machine, and the other end of the connecting pipe is communicated with the lower part of the preheating cavity. The air pump is located on the connecting pipe and is used to draw the hot air in the inner cavity of the injection molding machine into the preheating cavity; the control component is used to control the feeding and discharging between the hopper and the output end of the injection molding machine.

[0005] Further, the connecting pipe includes a first vertical pipe, a first horizontal pipe, a second horizontal pipe, a second vertical pipe and a third horizontal pipe. The first vertical pipe, the first horizontal pipe, the second horizontal pipe, the second vertical pipe and the third horizontal pipe are connected end to end. The first vertical pipe is communicated with the inner cavity of the injection molding machine, and the third horizontal pipe is communicated with the preheating cavity. The second vertical pipe and the third horizontal pipe are located on the side of the injection molding machine.

[0006] Further, the hopper and the injection molding machine are connected through an intermediate connecting sleeve. A convex ring is formed on the lower surface of the hopper, and the convex ring is inserted into the intermediate connecting sleeve.

[0007] Further, the control component includes a moving plate and a pushing cylinder block. A notch is formed on the side wall of the intermediate connecting sleeve. The moving plate extends into the intermediate connecting sleeve through the notch to seal the communication between the intermediate connecting sleeve and the inner cavity of the injection molding machine. The pushing cylinder block is used to push the moving plate to move back and forth.

[0008] Further, an arc-shaped connecting block is arranged in the preheating cavity.

[0009] Further, the air outlet hole is located above the preheating cavity, and an air outlet pipeline is connected to the opening of the air outlet hole.

[0010] Further, the air pump is arranged above the second vertical pipe. The air outlet end of the air pump is communicated with the second vertical pipe and is also communicated with the second horizontal pipe.

[0011] Further, the surface of the barrel has a strip-shaped notch, and a transparent scale plate is arranged at the strip-shaped notch.

[0012] Further, the barrel includes a barrel body and an upper cover plate. The upper cover plate is used to cover the upper opening of the barrel body, and the preheating cavity is located inside the side wall of the barrel body.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] In the present utility model, one end of the communication pipe in the residual heat preheating component is communicated with the inner cavity of the plastic injection molding machine, and the other end is communicated with the preheating cavity of the barrel. Under normal circumstances, the temperature in the middle of the inner cavity of the plastic injection molding machine is the highest, and the material grains are generally completely melted before reaching the middle of the plastic injection molding machine. Therefore, extracting hot air from the middle of the inner cavity of the plastic injection molding machine will not affect the normal operation of the plastic injection molding machine. By pumping the hot air into the preheating cavity, the material grains in the barrel are preheated. When the preheated material grains enter the inner cavity of the plastic injection molding machine, they can be quickly melted, thereby improving the extrusion efficiency of the plastic injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of an automatic feeding device of a plastic injection molding machine according to the present utility model;

[0016] Figure 2 is a three-dimensional structural schematic diagram of another direction of the present utility model;

[0017] Figure 3 is a sectional structural schematic diagram of the present utility model;

[0018] Figure 4 is a sectional structural schematic diagram of the upper cover body of the present utility model with a feeding hole opened;

[0019] Markings in the figure: 1. Barrel; 11. Material cavity; 12. Preheating cavity; 13. Arc connecting block; 14. Convex ring; 15. Transparent scale plate; 2. Residual temperature preheating assembly; 21. Connecting pipe; 211. First vertical pipe; 212. First horizontal pipe; 213. Second horizontal pipe; 214. Second vertical pipe; 215. Third horizontal pipe; 22. Air pump; 3. Control assembly; 31. Moving plate; 32. Pushing cylinder; 4. Intermediate connecting sleeve. Detailed implementation

[0020] In order to make the above features and advantages of the present utility model more obvious and understandable, specific embodiments are hereinafter given and described in detail in conjunction with the accompanying drawings as follows.

[0021] As Figures 1-3 shown, this embodiment provides an automatic feeding device for a plastic injection molding machine, including a barrel 1, a residual temperature preheating assembly 2, and a control assembly 3.

[0022] The barrel 1 is arranged above the output end of the injection molding machine, and the barrel 1 is communicated with the inner cavity of the injection molding machine. Specifically, the barrel 1 and the injection molding machine are connected through an intermediate connecting sleeve 4. A convex ring 14 is formed on the lower surface of the barrel 1, and the convex ring 14 is inserted into the intermediate connecting sleeve 4. The convex ring 14 is inserted into the intermediate connecting sleeve 4 at a height position of one-third to one-half. The convex ring 14 and the intermediate connecting sleeve 4 are connected by bolts.

[0023] The barrel 1 has a material cavity 11. A strip-shaped notch is formed on the surface of the barrel 1, and a transparent scale plate 15 is arranged at the strip-shaped notch. The amount of material entering the injection molding machine each time is judged by the change of the transparent scale plate 15. A preheating cavity 12 is formed on the inner side wall of the barrel 1, an arc connecting block 13 is arranged in the preheating cavity 12, an air outlet hole is formed on the side wall of the barrel 1, the air outlet hole is located above the preheating cavity 12, and an air outlet pipeline is connected to the opening of the air outlet hole. Specifically, the barrel 1 includes a barrel body and an upper cover plate. The upper cover plate is used to cover the upper opening of the barrel body, and the preheating cavity 12 is located inside the side wall of the barrel body.

[0024] Preferably, as Figure 4 shown, a feeding hole can be opened on the upper cover body and communicated with the material pipe, and the material is sucked into the material cavity 11 through a pump body to realize automatic feeding.

[0025] The control assembly 3 is used to control the feeding and discharging between the barrel 1 and the output end of the injection molding machine. Specifically, the control assembly 3 includes a moving plate 31 and a pushing cylinder 32. The pushing cylinder 32 can be a pneumatic cylinder, an oil cylinder or an electric cylinder. In this solution, an oil cylinder is selected. A notch is formed on the side wall of the intermediate connecting sleeve 4, and the moving plate 31 extends from the notch to close the communication between the intermediate connecting sleeve 4 and the inner cavity of the injection molding machine. The pushing cylinder 32 is used to push the moving plate 31 to move back and forth.

[0026] The residual heat preheating component 2 includes a connecting pipe 21 and an air pump 22. One end of the connecting pipe 21 is connected to the middle section of the inner cavity of the injection molding machine, and the other end of the connecting pipe 21 is connected to the lower part of the preheating cavity 12. Specifically, the connecting pipe 21 includes a first vertical pipe 211, a first horizontal pipe 212, a second horizontal pipe 213, a second vertical pipe 214 and a third horizontal pipe 215. The first vertical pipe 211, the first horizontal pipe 212, the second horizontal pipe 213, the second vertical pipe 214 and the third horizontal pipe 215 are connected end to end. The first vertical pipe 211 is connected to the inner cavity of the injection molding machine, and the third horizontal pipe 215 is connected to the preheating cavity 12. The second vertical pipe 214 and the third horizontal pipe 215 are located on the side of the injection molding machine. The air pump 22 is located on the connecting pipe 21 and is used to draw the hot air in the inner cavity of the injection molding machine into the preheating cavity 12. Specifically, the air pump 22 is arranged above the second vertical pipe 214. The air outlet end of the air pump 22 is connected to the second vertical pipe 214, and the air outlet end of the air pump is connected to the second horizontal pipe 213. Only when the second vertical pipe 214 and the third horizontal pipe 215 are arranged on the side of the injection molding machine, does the air pump 22 have enough space for installation.

[0027] Working principle: The air pump 22 operates to draw the hot air in the injection molding machine into the preheating cavity 12 of the barrel 1, and the barrel 1 heats up to preheat the material in the material cavity 11. When the material is preheated to the specified temperature, the electronic control system controls the push cylinder 32 to contract, and the moving plate 31 moves outward toward the notch. The material cavity 11 communicates with the inner cavity of the injection molding machine, and the material starts to enter the inner cavity of the injection molding machine. Observe the transparent scale plate 15. After the material is fed to the specified amount, the electronic control system controls the push cylinder 32 to eject, and the moving plate 31 is pushed in. The space between the material cavity 11 and the inner cavity of the injection molding machine is closed. After the preheated material enters the inner cavity of the plastic injection molding machine, it quickly melts and then is extruded from the extrusion end of the injection molding machine. By preheating the temperature of the material, the melting time of the material in the injection molding machine is reduced, thereby improving the extrusion efficiency.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding device for a plastic injection molding machine, characterized in that: It includes a barrel, a residual heat preheating component and a control component. The barrel is arranged above the output end of the injection molding machine. The barrel is communicated with the inner cavity of the injection molding machine. The barrel has a material cavity. A preheating cavity is formed on the inner side wall of the barrel. An air outlet hole is formed on the side wall of the barrel. The air outlet hole is communicated with the preheating cavity. The residual heat preheating component includes a connecting pipe and an air extraction pump. One end of the connecting pipe is communicated with the middle section of the inner cavity of the injection molding machine. The other end of the connecting pipe is communicated with the lower part of the preheating cavity. The air pump is located on the connecting pipe and is used to draw the hot air in the inner cavity of the injection molding machine into the preheating cavity. The control component is used to control the feeding and discharging between the barrel and the output end of the injection molding machine.

2. The automatic feeding device of a plastic injection molding machine according to claim 1, characterized in that: The connecting pipe includes a first vertical pipe, a first horizontal pipe, a second horizontal pipe, a second vertical pipe and a third horizontal pipe. The first vertical pipe, the first horizontal pipe, the second horizontal pipe, the second vertical pipe and the third horizontal pipe are connected end to end. The first vertical pipe is communicated with the inner cavity of the injection molding machine. The third horizontal pipe is communicated with the preheating cavity. The second vertical pipe and the third horizontal pipe are located on the side of the injection molding machine.

3. An automatic feeding device for a plastic injection molding machine according to claim 1, characterized in that: The barrel and the injection molding machine are connected through an intermediate connecting sleeve. A convex ring is formed on the lower surface of the barrel. The convex ring is inserted into the intermediate connecting sleeve.

4. The automatic feeding device for a plastic injection molding machine according to claim 3, characterized in that: The control component includes a moving plate and a pushing cylinder body. A notch is formed on the side wall of the intermediate connecting sleeve. The moving plate extends into the notch to block the communication between the intermediate connecting sleeve and the inner cavity of the injection molding machine. The pushing cylinder body is used to push the moving plate to move back and forth.

5. The automatic feeding device for a plastic injection molding machine according to claim 1, characterized in that: An arc-shaped connecting block is arranged in the preheating cavity.

6. The automatic feeding device of a plastic injection molding machine according to claim 1, characterized in that: The air outlet hole is located above the preheating cavity. An air outlet pipeline is connected to the opening of the air outlet hole.

7. An automatic feeding device for a plastic injection molding machine according to claim 2, characterized in that: The air pump is arranged above the second vertical pipe. The air outlet end of the air pump is communicated with the second vertical pipe. The air outlet end of the air pump is communicated with the second horizontal pipe.

8. The automatic feeding device of a plastic injection molding machine according to claim 1, characterized in that: The surface of the barrel has a strip-shaped notch. A transparent scale plate is arranged at the strip-shaped notch.

9. The automatic feeding device of a plastic injection molding machine according to claim 1, characterized in that: The barrel includes a cylinder body and an upper cover plate. The upper cover plate is used to cover the upper opening of the cylinder body. The preheating cavity is located in the side wall of the cylinder body.

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