Forming equipment for plastic packaging products

Abstract

The utility model discloses forming equipment for plastic packaging products, and relates to the technical field of plastic packaging products. The forming die comprises a lower forming die and an upper forming die, a feeding pipe is fixedly connected to the middle of the top face of the upper forming die in a penetrating mode, a sealing ring is fixedly connected to the bottom face of the upper forming die, a sealing groove is formed in the top face of the lower forming die, the sealing ring corresponds to and is matched with the sealing groove, and a column body is arranged on the outer side of the upper forming die. A vertical pipe is arranged in the middle of the outer side of the lower forming die, a vacuum pump and an air pump are arranged on the lower portion of the outer side of the lower forming die, the vertical pipe is matched with the working end of the vacuum pump and the working end of the air pump, a second communicating head is fixedly connected to the top end of the vertical pipe, and a vacuumizing pipe is fixedly connected to one end of the second communicating head. One end of the vacuumizing pipe extends into a die opening of the forming lower die; according to the utility model, the product forming effect is good, and the demolding is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging products, in particular to a molding device for plastic packaging products. Background Art

[0002] Plastic is a type of synthetic polymer material with plasticity. Together with synthetic rubber and synthetic fiber, it forms the three major synthetic materials that are indispensable in daily life. Plastic products are a general term for daily necessities and industrial products made of plastic as the main raw material. Plastic packaging boxes and boxes are very common in daily life and are widely used. The production of plastic packaging boxes mostly adopts injection molding, and molding molds are needed in the processing process.

[0003] In order to prevent leakage during the injection molding process, the existing molding mold has good sealing performance. However, a small amount of air will exist inside the mold during the assembly process and cannot be removed. During injection molding, the raw materials will squeeze out the air and mix with the air, affecting the quality of the product after molding. In response to the above problems, the inventors proposed a molding device for plastic packaging products to solve the above problems. Summary of the Invention

[0004] In order to solve the problem that a small amount of air exists in the mold cavity of the existing molding mold and cannot be removed, thereby affecting the quality of the molded product during injection molding; the purpose of this utility model is to provide a molding device for plastic packaging products.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a molding device for plastic packaging products, comprising a molding lower mold and a molding upper mold, a feeding pipe is fixedly connected through the middle of the top surface of the molding upper mold, a sealing ring is fixedly connected to the bottom surface of the molding upper mold, the top surface of the molding lower mold is provided with a sealing groove, the sealing ring corresponds to and cooperates with the sealing groove, a cylinder is provided on the outer side of the molding upper mold, a piston is fixedly connected to the bottom surface of the cylinder, a vertical pipe is provided on the middle part of the outer side of the molding lower mold, a vacuum pump and an air pump are provided on the lower part of the outer side of the molding lower mold, the vertical pipe cooperates with the working end of the vacuum pump and the air pump, the top end of the vertical pipe is fixedly connected to a second connecting head, one end of the second connecting head is fixedly connected to a vacuum pumping tube, and one end of the vacuum pumping tube extends into the die opening of the molding lower mold, the other end of the second connecting head is fixedly connected to an inflation tube, the output end of the inflation tube is fixedly connected to a cylinder, and the piston corresponds to and cooperates with the cylinder opening of the cylinder.

[0006] Preferably, the molding lower mold corresponds to the molding upper mold, and the molding upper mold is located above the molding lower mold, the outer side wall of the molding upper mold is fixedly connected with a hook, and the outer side wall of the molding lower mold is provided with a buckle, and the buckle corresponds to and cooperates with the hook. When closing the mold, the buckle is matched with the hook, so that the molding lower mold and the molding upper mold can be initially fixed. Then, the vacuum pump is started, and the internal mold cavity of the mold after closing the mold can be vacuumed through the vacuum tube, so as to fully discharge the air in the mold cavity and make the mold cavity in a relative vacuum state, so as to avoid the raw materials squeezing the air and mixing with the air during injection molding, which affects the quality of the product after molding. After the vacuum is drawn, the molding upper mold and the molding lower mold can be fixed more firmly under the internal and external pressures.

[0007] Preferably, the side wall of the feed pipe is provided with a first flow valve, and the side wall of the inflation pipe is provided with a second flow valve. The first flow valve is turned to keep the feed pipe in an unobstructed state, and the material can be poured into the mold cavity through the feed pipe. The top surface of the column is fixedly connected with a boss, and the boss is fixedly connected to the outer wall of the forming upper mold. The side wall of the cylinder is provided with a fixed seat, and the fixed seat is fixedly connected to the outer wall of the forming lower mold. When the mold is closed, the sealing effect can be better achieved through the mutual cooperation between the sealing ring and the sealing groove. When the mold is closed, the piston is located in the barrel mouth of the cylinder. When demolding, the air pump is started, and air can be inflated into the cylinder through the inflation pipe, thereby pushing the piston upward, and then the forming upper mold is moved upward through the column to separate the forming upper mold and the forming lower mold for demolding.

[0008] Preferably, the working end of the vacuum pump is fixedly connected to the first connecting pipe, the working end of the air pump is fixedly connected to the second connecting pipe, the end of the vertical pipe facing away from the second connecting head is fixedly connected to the first connecting head, the pipe end of the first connecting pipe and the pipe end of the second connecting pipe are both fixed to the first connecting head, and the side walls of the first connecting pipe and the second connecting pipe are both provided with solenoid valves, which can control the opening and closing of the first connecting pipe and the second connecting pipe. When starting the vacuum pump, the second connecting pipe needs to be closed, and when starting the air pump, the first connecting pipe needs to be closed.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] (1) The utility model has a good product molding effect. During injection molding, the internal mold cavity of the mold after mold closing can be evacuated by a vacuum pump, thereby fully exhausting the air in the mold cavity and making the mold cavity in a relatively vacuum state, thereby avoiding the raw materials squeezing out the air and mixing with the air during injection molding, which affects the quality of the product after molding. Moreover, after the vacuum is extracted, the upper mold and the lower mold can be fixed more firmly under the internal and external pressures;

[0011] (2) The utility model is convenient for demolding. When demolding, the air pump is started and air is inflated into the cylinder through the air inflation tube to push the piston upward, thereby separating the upper molding die from the lower molding die for demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is an exploded view of the utility model.

[0015] Figure 3 This is an enlarged view of point A of the present utility model.

[0016] Figure 4 This is a schematic diagram of the coordination between the vertical pipe, vacuum tube and inflation tube of the utility model.

[0017] In the figure: 1. forming lower mold; 2. forming upper mold; 3. feed pipe; 4. first flow valve; 5. sealing ring; 6. hook; 7. boss; 8. cylinder; 9. piston; 10. buckle; 11. sealing groove; 12. vertical pipe; 13. first connecting head; 14. second connecting head; 15. vacuum pump; 16. first connecting pipe; 17. air pump; 18. second connecting pipe; 19. vacuum tube; 20. inflation tube; 21. second flow valve; 22. cylinder. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example: Figure 1-4As shown, the utility model provides a molding device for plastic packaging products, including a molding lower mold 1 and a molding upper mold 2, a feed pipe 3 is fixedly connected to the middle of the top surface of the molding upper mold 2, a sealing ring 5 is fixedly connected to the bottom surface of the molding upper mold 2, a sealing groove 11 is provided on the top surface of the molding lower mold 1, and the sealing ring 5 corresponds to and cooperates with the sealing groove 11, a column 8 is provided on the outer side of the molding upper mold 2, a piston 9 is fixedly connected to the bottom surface of the column 8, a vertical pipe 12 is provided on the middle part of the outer side of the molding lower mold 1, and the molding lower mold 1 is provided with a vertical pipe 12. A vacuum pump 15 and an air pump 17 are provided at the lower outer part, and the vertical pipe 12 cooperates with the working ends of the vacuum pump 15 and the air pump 17. The top of the vertical pipe 12 is fixedly connected to the second connecting head 14, and one end of the second connecting head 14 is fixedly connected to the vacuum tube 19, and one end of the vacuum tube 19 extends into the mold opening of the forming lower mold 1, and the other end of the second connecting head 14 is fixedly connected to the inflation tube 20, and the output end of the inflation tube 20 is fixedly connected to the cylinder 22, and the piston 9 corresponds to and cooperates with the cylinder mouth of the cylinder 22.

[0020] The molding lower mold 1 corresponds to the molding upper mold 2, and the molding upper mold 2 is located above the molding lower mold 1. The outer wall of the molding upper mold 2 is fixedly connected with a hook 6, and the outer wall of the molding lower mold 1 is provided with a buckle 10, which corresponds to and cooperates with the hook 6.

[0021] By adopting the above technical solution, when closing the mold, the buckle 10 is matched with the hook 6, so that the molding lower mold 1 and the molding upper mold 2 can be initially fixed. Then, the vacuum pump 15 is started, and the internal mold cavity of the mold after closing the mold can be vacuumed through the vacuum tube 19, so as to fully discharge the air in the mold cavity and make the mold cavity in a relative vacuum state, so as to avoid the raw materials squeezing the air and mixing with the air during injection molding, which affects the quality of the product after molding. After the vacuum is drawn, the molding upper mold 2 and the molding lower mold 1 can be fixed more firmly under the internal and external pressures.

[0022] A first flow valve 4 is provided on the side wall of the feed pipe 3 , and a second flow valve 21 is provided on the side wall of the inflation pipe 20 .

[0023] By adopting the above technical solution, the first flow valve 4 is turned to make the feed pipe 3 unobstructed, and the material can be poured into the mold cavity through the feed pipe 3.

[0024] The top surface of the column 8 is fixedly connected with a boss 7 , which is fixedly connected to the outer side wall of the upper forming die 2 . The side wall of the cylinder 22 is provided with a fixing seat, which is fixedly connected to the outer side wall of the lower forming die 1 .

[0025] By adopting the above technical solution, when the mold is closed, the sealing effect can be better achieved through the mutual cooperation between the sealing ring 5 and the sealing groove 11, and when the mold is closed, the piston 9 is located in the barrel mouth of the cylinder 22. When the mold is demolded, the air pump 17 is started and air can be inflated into the cylinder 22 through the inflation tube 20, thereby pushing the piston 9 upward, and then the molding upper mold 2 is moved upward through the column 8, so that the molding upper mold 2 is separated from the molding lower mold 1 for demolding.

[0026] The working end of the vacuum pump 15 is fixedly connected to the first connecting pipe 16, the working end of the air pump 17 is fixedly connected to the second connecting pipe 18, and the end of the vertical pipe 12 facing away from the second connecting head 14 is fixedly connected to the first connecting head 13. The pipe ends of the first connecting pipe 16 and the pipe ends of the second connecting pipe 18 are both fixed to the first connecting head 13.

[0027] By adopting the above technical solution, solenoid valves are provided on the side walls of the first connecting tube 16 and the second connecting tube 18, which can control the opening and closing of the first connecting tube 16 and the second connecting tube 18. When the vacuum pump 15 is started, the second connecting tube 18 needs to be closed, and when the air pump 17 is started, the first connecting tube 16 needs to be closed.

[0028] Working principle: When the utility model is in use, when closing the mold, the buckle 10 is matched with the hook 6, so that the molding lower mold 1 and the molding upper mold 2 can be initially fixed. Then, the vacuum pump 15 is started, and the mold cavity inside the mold after the mold is closed can be vacuumed through the vacuum pipe 19, so as to fully discharge the air in the mold cavity and make the mold cavity in a relatively vacuum state, so as to avoid the raw materials squeezing out the air and mixing with the air during injection molding, which affects the quality of the molded product. After the vacuum is drawn, the molding upper mold 2 and the molding lower mold 1 can be fixed more firmly under the internal and external pressures.

[0029] Material can be poured into the mold cavity through the feed pipe 3. When demolding, the air pump 17 is started, and air can be inflated into the cylinder 22 through the inflation pipe 20, thereby pushing the piston 9 upward, and then the forming upper mold 2 is moved upward through the column 8, so that the forming upper mold 2 is separated from the forming lower mold 1 for the demolding operation.

[0030] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A molding device for plastic packaging products, comprising a molding lower mold (1) and a molding upper mold (2), characterized in that: A feed pipe (3) is fixedly connected to the middle of the top surface of the upper forming mold (2), a sealing ring (5) is fixedly connected to the bottom surface of the upper forming mold (2), a sealing groove (11) is provided on the top surface of the lower forming mold (1), the sealing ring (5) corresponds to and matches the sealing groove (11), a column (8) is provided on the outside of the upper forming mold (2), a piston (9) is fixedly connected to the bottom surface of the column (8), a vertical pipe (12) is provided on the middle of the outside of the lower forming mold (1), a vacuum pump (15) and an air pump (15) are provided on the lower part of the outside of the lower forming mold (1), and the sealing ring (5) corresponds to and matches the sealing groove (11). 7), the vertical tube (12) cooperates with the working end of the vacuum pump (15) and the air pump (17), the top end of the vertical tube (12) is fixedly connected to the second connecting head (14), one end of the second connecting head (14) is fixedly connected to the vacuum tube (19), and one end of the vacuum tube (19) extends into the die opening of the molding lower die (1), the other end of the second connecting head (14) is fixedly connected to the inflation tube (20), the output end of the inflation tube (20) is fixedly connected to the cylinder (22), and the piston (9) corresponds to and cooperates with the cylinder opening of the cylinder (22).

2. A plastic packaging product forming device according to claim 1, characterized in that: The lower forming die (1) corresponds to the upper forming die (2), and the upper forming die (2) is located above the lower forming die (1).

3. A plastic packaging product forming device according to claim 1, characterized in that: The outer side wall of the upper forming die (2) is fixedly connected with a hook (6), and the outer side wall of the lower forming die (1) is provided with a buckle (10), and the buckle (10) corresponds to and cooperates with the hook (6).

4. A plastic packaging product forming device according to claim 1, characterized in that: A first flow valve (4) is provided on the side wall of the feed pipe (3), and a second flow valve (21) is provided on the side wall of the inflation pipe (20).

5. The molding device for plastic packaging products according to claim 1, characterized in that: The top surface of the column (8) is fixedly connected to a boss (7), and the boss (7) is fixedly connected to the outer side wall of the upper forming die (2).

6. A plastic packaging product forming device according to claim 1, characterized in that: The side wall of the cylinder (22) is provided with a fixing seat, and the fixing seat is fixedly connected to the outer side wall of the lower forming die (1).

7. The molding device for plastic packaging products according to claim 1, characterized in that: The operating end of the vacuum pump (15) is fixedly connected to a first connecting pipe (16), and the operating end of the air pump (17) is fixedly connected to a second connecting pipe (18).

8. A plastic packaging product forming device according to claim 7, characterized in that: One end of the vertical pipe (12) facing away from the second connecting head (14) is fixedly connected to the first connecting head (13), and the pipe end of the first connecting pipe (16) and the pipe end of the second connecting pipe (18) are both fixed to the first connecting head (13).

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