Plastic packaging box injection molding device

Abstract

The utility model belongs to the technical field of plastic molds, and particularly relates to a plastic packaging box injection molding device which comprises a mounting block, an upper mold is fixedly connected to the bottom of the mounting block, a lower mold is arranged on the lower side of the mounting block, the mounting block is matched with the lower mold, and a pushing assembly is arranged on the upper portion of the mounting block. Two turning frames are arranged at the top of the interior of the lower mold, and connecting hinges are fixedly connected to the outer sides of the two turning frames. Potential energy accumulated by a spring during injection molding is released, the potential energy is converted into kinetic energy to push a pushing block to move downwards and push a plastic packaging box body to prevent the plastic packaging box body from being adhered to an upper mold, potential energy accumulated by a torsional spring during injection molding is released, the potential energy is converted into kinetic energy to drive a turning frame to turn upwards, and the plastic packaging box body is further pushed out. The plastic packaging box main body is prevented from being adhered to the inner wall of the lower mold and the mold, so that the plastic packaging box main body is convenient to take.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic molds, in particular to an injection molding device for a plastic packaging box. Background Art

[0002] Plastic molds are tools used in the plastics processing industry to complement plastic molding machines, giving plastic products their complete shape and precise dimensions. Due to the wide variety of plastics and processing methods, and the varying complexity of plastic molding machines and plastic products, the types and structures of plastic molds are also diverse.

[0003] After searching, the existing Chinese patent announcement number CN210211180U provides an injection mold for a packaging box. The patent discloses an injection mold for a packaging box through this utility model, including an upper mold, an upper template, a lower mold, a mold cavity, a base and upper and lower mold fixing columns, wherein the upper mold is connected to the upper template, the upper template is provided with an injection port, a mold cavity is formed between the upper mold and the lower mold, the upper and lower mold fixing columns are provided on the base, the upper template passes through the upper and lower mold fixing columns, and the upper template moves up and down along the upper and lower mold positioning columns. This device can effectively reduce bubbles in the material, reduce the bubble defects of plastic parts, and improve production efficiency.

[0004] Although this device can effectively reduce bubbles in the material, when using an injection molding machine to produce thin-walled plastic packaging boxes, due to the thin main structure of the box, the thin-walled structure is easy to stick to the mold during demoulding after molding, which can easily cause the packaging box to be damaged during the demoulding process.

[0005] In view of the above problems, a plastic packaging box injection molding device is proposed. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the problems in the background technology, a plastic packaging box injection molding device is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a plastic packaging box injection molding device described in the utility model includes a mounting block, the bottom of the mounting block is fixedly connected to the upper mold, the lower side of the mounting block is provided with a lower mold, and the mounting block and the lower mold cooperate with each other, the upper part of the mounting block is provided with a pushing assembly, and the top of the lower mold is provided with two flip frames, the outer sides of the two flip frames are fixedly connected to the connecting hinges, and the other ends of the two connecting hinges are fixedly connected to the lower mold, and torsion springs are provided on both sides of the connecting hinges, and the two ends of the torsion springs are respectively fixedly connected to the connecting hinges and the lower mold.

[0008] Preferably, the pushing assembly includes a pushing block, which is slidably connected to the mounting block, and the top of the pushing block is fixedly connected with equidistant limiting rods, and the limiting rods are slidably connected to the mounting block, and the outer rings of the equidistant limiting rods are each provided with springs, and the two ends of the springs are respectively fixedly connected to the mounting block and the pushing block.

[0009] Preferably, guide columns distributed at equal distances are fixedly connected to the outer side of the mounting block.

[0010] Preferably, the outer side of the lower mold is fixedly connected with equidistantly distributed guide grooves, and the guide grooves correspond to the guide posts.

[0011] Preferably, a square clip is fixedly connected to the bottom of the mounting block, a clip slot is provided on the top of the lower mold, and the square clip corresponds to the clip slot, and a clip slot is provided on the top of the flip frame.

[0012] Preferably, the interior of the installation block is connected to a delivery pipe, and the delivery pipe passes through the installation block, and the upper end of the delivery pipe is connected to an injection pipe.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a plastic packaging box injection molding device, which releases the potential energy accumulated by the spring during injection molding, converts the potential energy into kinetic energy to push the pushing block downward, and at the same time pushes the plastic packaging box body to prevent it from sticking to the upper mold. By releasing the potential energy accumulated by the torsion spring during injection molding, the potential energy is converted into kinetic energy, driving the flip frame to flip upward, further pushing the plastic packaging box body out, preventing it from sticking to the inner wall of the lower mold, and preventing the plastic packaging box body from sticking to the mold, making it convenient to take the plastic packaging box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the main body of the plastic packaging box in the present utility model;

[0018] Figure 3 It is a schematic diagram of the spring in the utility model;

[0019] Figure 4 It is a schematic diagram of the flip frame in the utility model;

[0020] Figure 5 It is a schematic diagram of the torsion spring in the utility model;

[0021] Legend:

[0022] 1. Limit rod; 2. Guide column; 3. Guide groove; 4. Injection tube; 5. Mounting block; 6. Lower mold; 7. Plastic packaging box body; 8. Card slot; 9. Square card strip; 10. Upper mold; 11. Spring; 12. Push block; 13. Delivery tube; 14. Connecting hinge; 15. Flip frame; 16. Torsion spring. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying 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.

[0024] Specific examples are given below.

[0025] See also Figure 1 - Figure 5 The utility model provides a plastic packaging box injection molding device, including a mounting block 5, the bottom of the mounting block 5 is fixedly connected to the upper mold 10, the lower side of the mounting block 5 is provided with a lower mold 6, and the mounting block 5 and the lower mold 6 cooperate with each other, the upper part of the mounting block 5 is provided with a pushing assembly, the top of the lower mold 6 is provided with two flip frames 15, the outer sides of the two flip frames 15 are fixedly connected to the connecting hinges 14, and the other ends of the two connecting hinges 14 are fixedly connected to the lower mold 6, both sides of the connecting hinges 14 are sleeved with torsion springs 16, and the two ends of the torsion spring 16 are respectively fixedly connected to the connecting hinges 14 and the lower mold 6, the pushing assembly includes a pushing block 12, the pushing block 12 is slidably connected to the mounting block 5, the top of the pushing block 12 is fixedly connected to the equidistantly distributed limit rods 1, and the limit rod 1 is slidably connected to the mounting block 5, the outer rings of the equidistantly distributed limit rods 1 are sleeved with springs 11, and the two ends of the spring 11 are respectively fixedly connected to the mounting block 5 and the pushing block 12.

[0026] When working, when injection molding begins, first, the mounting block 5 and the lower mold 6 are put together through the combined mold. During the mold integration process, the mounting block 5 falls, and first the pushing block 12 contacts the edge of the lower mold 6, and with the cooperation of the lower mold 6, the spring 11 is squeezed and the pushing block 12 is flush with the bottom of the mounting block 5. At the same time, the bottom of the upper mold 10 contacts and squeezes the flip frame 15 downward, and with the cooperation of the connecting hinge 14, the connecting hinge 14 is flipped downward, and further contacts the card slot 8 through the square card strip 9. Under the action of the square card strip 9, the flip frame 15 is squeezed and flipped to the limit position. At the same time, in the process of squeezing and flipping the flip frame 15, the torsion spring 16 is also compressed, and the mounting block 5 and the lower mold 6 are separated. The mounting block 5 is driven upward by the machine, and the pushing block 12 released after being compressed pushes the plastic packaging box 8 downward to prevent it from sticking to the upper mold 10. When the mounting block 5 moves up, the square card strip 9 will retreat from the card slot 8, so that the plastic packaging box 8 compressed before injection molding is When the pressing block 12 is released from the restriction of the lower mold 6, the spring 11 drives the pushing block 12 to move downward to prevent the plastic packaging box body 7 from sticking to the upper mold 10. Under the synchronous cooperation of the flipping frame 15 and the pushing block 12, the plastic packaging box body 7 can be demoulded more conveniently and safely without causing damage to the plastic packaging box body 7.

[0027] Further, such as Figure 2 and Figure 3 As shown, the outer side of the mounting block 5 is fixedly connected to the guide columns 2 distributed at equal distances, the outer side of the lower mold 6 is fixedly connected to the guide grooves 3 distributed at equal distances, and the guide grooves 3 correspond to the guide columns 2, the bottom of the mounting block 5 is fixedly connected to the square clamping strip 9, the top of the lower mold 6 is provided with a clamping slot 8, and the square clamping strip 9 corresponds to the clamping slot 8, the top of the flip frame 15 is provided with a clamping slot 8, the interior of the mounting block 5 is connected to the delivery pipe 13, and the delivery pipe 13 passes through the mounting block 5, and the upper end of the delivery pipe 13 is connected to the injection pipe 4,

[0028] During operation, the molten plastic is then injected through the injection pipe 4, and the molten plastic is further dispersed into the branch pipe through the main pipe of the conveying pipe 13, and enters the gap between the mounting block 5 and the lower mold 6. After a certain period of shaping, the plastic packaging box 8 is ready to be taken out. During the movement of the mounting block 5, the guide column 2 is aligned with the opening on the guide groove 3 to locate the position of the mounting block 5 relative to the lower mold 6, thereby avoiding the misalignment of the model and the failure of injection molding. The conveying pipe 13 arranged inside the mounting block 5 has discharge ports on the four sides of the upper mold 10, so that during the injection process, the raw materials enter faster and are distributed more evenly, avoiding the uneven distribution of raw materials caused by a single outlet and the unformed plastic packaging box body 7. During the falling process of the mounting block 5, the square card strip 9 will contact and squeeze the card slot 8 on the lower mold 6, and at the same time squeeze the card slot 8 on the flip frame 15. During the extrusion process, the two flip frames 15 will be squeezed and made to be in a state of close contact with the lower mold 6, preparing for subsequent injection molding.

[0029] Working principle: When the injection molding starts, the mounting block 5 and the lower mold 6 are first combined through the combined mold. During the mold integration process, the mounting block 5 falls, and the push block 12 first contacts the edge of the lower mold 6, and with the cooperation of the lower mold 6, squeezes the spring 11 and makes the push block 12 flush with the bottom of the mounting block 5. At the same time, the bottom of the upper mold 10 contacts and squeezes the flip frame 15 downward, and with the cooperation of the connecting hinge 14, the connecting hinge 14 is flipped downward, and further contacts the card slot 8 through the square card strip 9. Under the action of the square card strip 9, the flip frame 15 is squeezed and flipped to the limit position. At the same time, in the process of squeezing and flipping the flip frame 15, the torsion spring 16 is also compressed, and then the molten metal is injected through the injection tube 4. The molten plastic is further dispersed into the branch pipe through the main pipe of the conveying pipe 13, and enters the gap between the mounting block 5 and the lower mold 6. After a certain period of shaping, the mounting block 5 and the lower mold 6 begin to be separated, and the mounting block 5 is driven upward by the machine. The pushing block 12 released after being compressed pushes the plastic packaging box 8 downward to prevent it from sticking to the upper mold 10. When the mounting block 5 moves upward, the square card strip 9 will retreat from the card slot 8, so that the torsion spring 16 compressed before injection molding begins to release the reaction force, driving the flip frame 15 to flip upward, and further push the plastic packaging box 8 upward through the lower end of the flip frame 15 to prevent it from sticking to the inside of the lower mold 6, and to prevent the plastic from being guaranteed and sticking to the upper mold 10 and the lower mold 6.

[0030] 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 to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A plastic packaging box injection molding device, characterized by: The invention comprises a mounting block (5), wherein the bottom of the mounting block (5) is fixedly connected to an upper mold (10), a lower mold (6) is provided on the lower side of the mounting block (5), and the mounting block (5) and the lower mold (6) cooperate with each other, a pushing assembly is provided on the upper part of the mounting block (5), and two flipping frames (15) are provided on the top of the inner part of the lower mold (6), the outer sides of the two flipping frames (15) are fixedly connected to a connecting hinge (14), and the other ends of the two connecting hinges (14) are fixedly connected to the lower mold (6), and torsion springs (16) are sleeved on both sides of the connecting hinge (14), and the two ends of the torsion spring (16) are fixedly connected to the connecting hinge (14) and the lower mold (6) respectively, and a plastic packaging box body (7) is provided between the inner sides of the upper mold (10) and the lower mold (6).

2. The plastic packaging box injection molding device according to claim 1, characterized in that: The pushing assembly includes a pushing block (12), the pushing block (12) is slidably connected to the mounting block (5), the top of the pushing block (12) is fixedly connected with equally spaced limiting rods (1), and the limiting rods (1) are slidably connected to the mounting block (5), the outer rings of the equally spaced limiting rods (1) are each sleeved with springs (11), and the two ends of the springs (11) are fixedly connected to the mounting block (5) and the pushing block (12), respectively.

3. The plastic packaging box injection molding device according to claim 1, characterized in that: The outer side of the mounting block (5) is fixedly connected to guide columns (2) distributed at equal distances.

4. The plastic packaging box injection molding device according to claim 1, characterized in that: The outer side of the lower mold (6) is fixedly connected to guide grooves (3) distributed at equal intervals, and the guide grooves (3) correspond to the guide columns (2).

5. The plastic packaging box injection molding device according to claim 1, characterized in that: A square clip (9) is fixedly connected to the bottom of the mounting block (5), a clip slot (8) is provided on the top of the lower mold (6), and the square clip (9) corresponds to the clip slot (8), and a clip slot (8) is provided on the top of the flip frame (15).

6. The plastic packaging box injection molding device according to claim 1, characterized in that: The interior of the installation block (5) is connected to a delivery pipe (13), and the delivery pipe (13) passes through the installation block (5). The upper end of the delivery pipe (13) is connected to the injection pipe (4).

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