Double-slider secondary core-pulling mechanism of plastic logistics turnover box injection mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a double-slider secondary core-pulling mechanism for an injection mold of a plastic logistics turnover box. The logistics turnover box forming die comprises a logistics turnover box forming lower die and a logistics turnover box forming upper die. In the injection molding process, after molten materials are injected into the cavity to form a logistics turnover box plastic part, the molds are opened, the logistics turnover box forming upper mold and the box top forming part are moved towards one end far away from the turnover box forming embedding seat, the upper space is opened, and the logistics turnover box is formed. According to the structure, the double-sliding-block forming assembly is matched with the side core-pulling rod to move towards the end away from the turnover box forming main frame, the side space and the end space are opened, then the bottom core-pulling rod is matched with the bottom core-pulling alignment part to eject the turnover box forming embedding base upwards, and the plastic part is taken out. And subsequent workers can conveniently and completely take out the plastic part, the problems that a shell is stuck and demolding cannot be achieved through a tool are avoided, and practicability is high.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a double slider secondary core pulling mechanism for injection molds of plastic logistics turnover boxes. Background Technology

[0002] Plastic turnover boxes are characterized by high production efficiency and low cost. They are also aesthetically pleasing and highly consistent, making them a widely accepted and used product in today's fast-paced life. Patterns and other features are added to the outer walls of plastic turnover boxes to improve their appearance and extend their lifespan. Currently, after injection molding, the molded plastic parts are typically ejected by ejector pins. However, because the outer walls of the plastic parts have patterns, friction occurs between the patterns and the inner wall of the mold during ejection. This makes it difficult to ensure sufficient demolding space on the top and sides of the plastic parts, leading to jamming and damage to the outer patterns, thus affecting the integrity of the plastic parts.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a shear-free hot runner gate mechanism for logistics turnover box molds [Application No.: 202121756541.9], which includes a lower injection mold and an upper injection mold, with a turnover box auxiliary forming part provided between the lower and upper injection molds. This utility model, by setting up the turnover box auxiliary forming part, brings the lower and upper injection molds close together during injection molding, forming a complete cavity in conjunction with the turnover box auxiliary forming part. The shear-free hot runner gate assembly is located within the cavity and works with the turnover box to form the mold. Molten material is injected into the cavity through the injection molded part. During injection molding, the shear-free hot runner gate assembly automatically forms the hot runner gate. After injection molding is completed, the shear-free hot runner gate assembly is extracted. However, this method still cannot guarantee sufficient demolding space on the top and sides of the plastic part when demolding after injection molding. The plastic part is still prone to jamming and damage to the outer pattern, which has the defect of affecting the integrity of the plastic part. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A double-slider secondary core-pulling mechanism for injection molding of plastic logistics turnover boxes includes a lower mold and an upper mold. A main frame for forming the turnover box is provided between the lower and upper molds. A turnover box forming insert is provided within the main frame. A double-slider forming assembly and a top forming component are located between the upper mold and the main frame. A bottom core-pulling alignment part is provided within the lower mold, and a side core-pulling alignment part is provided within the main frame. The bottom and side core-pulling alignment parts are staggered, and the side core-pulling alignment parts correspond to the positions of the double-slider forming assembly.

[0007] In the above-mentioned double-slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the double-slider forming assembly includes an end forming slider and a side forming slider disposed between the upper mold of logistics turnover box forming and the main frame of turnover box forming, and the end forming slider and the side forming slider correspond to the positions of the turnover box forming insert.

[0008] In the above-mentioned double slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the inner side of the end forming slider has an end textured part, and a forming gap is formed between the inner side of the end forming slider and the turnover box forming insert.

[0009] In the above-mentioned double slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the inner side of the side forming slider has a side textured part, and a forming gap is formed between the inner side of the side forming slider and the turnover box forming insert.

[0010] In the above-mentioned double slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the bottom of the end forming slider has a first alignment groove, and the main frame of turnover box forming has a first alignment protrusion, and the first alignment protrusion and the first alignment groove are engaged and matched.

[0011] In the above-mentioned double slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the bottom of the side forming slider has a second alignment groove, and the main frame of turnover box forming has a second alignment protrusion, and the second alignment protrusion and the second alignment groove are engaged and matched.

[0012] In the above-mentioned double slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the box top forming part includes a box top forming plate disposed between the upper mold of logistics turnover box forming and the main frame of turnover box forming, and the box top forming plate has a box top textured part.

[0013] In the above-mentioned double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes, the bottom core-pulling alignment part includes a plurality of bottom core-pulling holes provided in the lower mold of the logistics turnover box forming, and the bottom core-pulling holes are directly opposite to the bottom of the turnover box forming insert.

[0014] In the above-mentioned double slider secondary core-pulling mechanism for injection mold of plastic logistics turnover box, the side core-pulling alignment part includes several side core-pulling rod grooves provided in the main frame of turnover box forming. The end forming slider and the side forming slider are provided with sliding rod holes, and the side core-pulling rod grooves and sliding rod holes are arranged opposite each other.

[0015] In the above-mentioned double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes, the upper mold of the logistics turnover box has a main injection hole, and the top molding plate of the box has an injection pressure hole, which is connected to the main injection hole.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In the injection molding process, the lower mold and upper mold of the logistics turnover box are brought close together, so that the double slider molding assembly and the box top molding part cooperate with the turnover box molding insert in the main frame of the turnover box forming to form a complete cavity. After the molten material is injected into the cavity to form the logistics turnover box plastic part, the mold is opened. First, the upper mold and the box top molding part are moved away from the turnover box molding insert to open the upper space. Then, with the help of the side core-pulling rod, the double slider molding assembly is moved away from the main frame of the turnover box forming to open the side and end spaces. Then, with the help of the bottom core-pulling rod and the bottom core-pulling alignment part, the turnover box molding insert is pushed upward to remove the plastic part. This structure can ensure that there is sufficient space above and around the plastic part during demolding, which makes it convenient for the staff to remove the plastic part completely and avoids the problems of jamming and inability to use tools for demolding. It is highly practical.

[0018] 2. In the injection molding process, the end molding slider and the side molding slider of this utility model cooperate with the turnover box molding insert to assist in molding the end and side of the plastic part. The end texture part is used to simultaneously mold the end pattern of the plastic part, and the side texture part is used to simultaneously mold the side pattern of the plastic part. No secondary processing is required, which shortens the process.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0023] Figure 4 This is a partial structural diagram of the dual-slider forming assembly.

[0024] Figure 5 This is a structural schematic diagram of the top molding plate of the box.

[0025] Figure 6 This is a partial structural schematic diagram of another aspect of this utility model.

[0026] In the diagram: 1. Lower mold for forming logistics turnover box; 2. Upper mold for forming logistics turnover box; 3. Main frame for forming turnover box; 4. Forming insert for turnover box; 5. Double slider forming assembly; 6. Top forming part; 7. Bottom core pulling alignment part; 8. Side core pulling alignment part; 9. End forming slider; 10. Side forming slider; 11. End texture part; 12. Side texture part; 13. First alignment groove; 14. First alignment protrusion; 15. Second alignment groove; 16. Second alignment protrusion; 17. Top forming plate; 18. Top texture part; 19. Bottom core pulling hole; 20. Side core pulling rod groove; 21. Sliding rod hole; 22. Main injection hole; 23. Injection pressure hole. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, a double-slider secondary core-pulling mechanism for injection molding of plastic logistics turnover boxes includes a lower mold 1 and an upper mold 2 for forming logistics turnover boxes. A main frame 3 for forming turnover boxes is provided between the lower mold 1 and the upper mold 2. A turnover box forming insert 4 is provided inside the main frame 3. A double-slider forming assembly 5 and a box top forming part 6 are provided between the upper mold 2 and the main frame 3. A bottom core-pulling alignment part 7 is provided inside the lower mold 1. A side core-pulling alignment part 8 is provided inside the main frame 3. The bottom core-pulling alignment part 7 and the side core-pulling alignment part 8 are staggered. The side core-pulling alignment part 8 corresponds to the position of the double-slider forming assembly 5.

[0029] In this embodiment, during the injection molding process, the lower mold 1 and the upper mold 2 of the logistics turnover box are brought close to each other, so that the double slider molding assembly 5 and the box top molding part 6 respectively cooperate with the turnover box molding insert 4 in the turnover box molding main frame 3 to form a complete cavity. After the molten material is injected into the cavity to form the logistics turnover box plastic part, the mold is opened. First, the upper mold 2 and the box top molding part 6 of the logistics turnover box are moved away from the turnover box molding insert 4 to open the upper space. Then, with the help of the side core-pulling rod, the double slider molding assembly 5 is moved away from the turnover box molding main frame 3 to open the side and end spaces. Then, with the help of the bottom core-pulling rod and the bottom core-pulling alignment part 7, the turnover box molding insert 4 is pushed upward to remove the plastic part. This structure can ensure that there is sufficient space above and around the plastic part during demolding, which makes it convenient for the staff to remove the plastic part completely and avoids the problems of jamming and inability to demold with tools. It is highly practical.

[0030] Combination Figure 1-6 As shown, the dual-slider forming assembly 5 includes an end forming slider 9 and a side forming slider 10 disposed between the upper mold 2 and the main frame 3 of the turnover box forming assembly. The end forming slider 9 and the side forming slider 10 are respectively positioned opposite to the turnover box forming insert 4. The end forming slider 9 has an end texture portion 11 on its inner side, and a forming gap is formed between the inner side of the end forming slider 9 and the turnover box forming insert 4. The side forming slider 10 has a side texture portion 12 on its inner side, and a forming gap is formed between the inner side of the side forming slider 10 and the turnover box forming insert 4.

[0031] In this embodiment, during the injection molding process, the end molding slider 9 and the side molding slider 10 cooperate with the turnover box molding insert 4 to assist in molding the end and side of the plastic part. The end texture part 11 is used to simultaneously mold the end pattern of the plastic part, and the side texture part 12 is used to simultaneously mold the side pattern of the plastic part. No secondary processing is required, which shortens the process.

[0032] The end forming slider 9 has a first alignment groove 13 at its bottom, and the turnover box forming main frame 3 has a first alignment protrusion 14. The first alignment protrusion 14 and the first alignment groove 13 are engaged and matched.

[0033] In this embodiment, during mold closing, the first alignment protrusion 14 and the first alignment groove 13 engage with each other, which facilitates the alignment of the end forming slider 9 with high precision.

[0034] Combination Figure 3 As shown, the bottom of the side forming slider 10 has a second alignment groove 15, and the main frame 3 of the turnover box forming has a second alignment protrusion 16. The second alignment protrusion 16 and the second alignment groove 15 are engaged and matched.

[0035] In this embodiment, during mold closing, the second alignment protrusion 16 and the second alignment groove 15 engage with each other, which facilitates the alignment of the side forming slider 10 with high precision.

[0036] The box top forming component 6 includes a box top forming plate 17 disposed between the upper mold 2 for forming logistics turnover boxes and the main frame 3 for forming turnover boxes, and the box top forming plate 17 has a box top textured part 18.

[0037] In this embodiment, during the injection molding process, the top molding plate 17 of the box cooperates with the turnover box molding insert 4 to form the top structure of the plastic part, and the textured part 18 of the box top is used to simultaneously form the pattern structure of the box top, without the need for secondary processing, thus shortening the process.

[0038] Combination Figure 1-6 As shown, the bottom core-pulling alignment part 7 includes a plurality of bottom core-pulling holes 19 disposed in the lower mold 1 for forming the logistics turnover box, and the bottom core-pulling holes 19 are directly opposite to the bottom of the turnover box forming insert 4. The side core-pulling alignment part 8 includes a plurality of side core-pulling rod grooves 20 disposed in the main frame 3 for forming the turnover box, and the end forming slider 9 and the side forming slider 10 are provided with sliding rod holes 21, and the side core-pulling rod grooves 20 are directly opposite to the sliding rod holes 21.

[0039] In this embodiment, after the mold is opened, the upper mold 2 and the top mold 6 of the logistics turnover box are first moved away from the turnover box molding insert 4 to open the upper space. Then, with the help of the side core-pulling rod, the end molding slider 9 and the side molding slider 10 are moved away from the turnover box molding main frame 3 through the side core-pulling rod groove 20 and the slide rod hole 21 to open the side and end spaces. Then, the turnover box molding insert 4 is pushed upward by the bottom core-pulling rod with the bottom core-pulling hole 19 to remove the plastic part. This structure can ensure that there is enough space above and around the plastic part when demolding, which makes it convenient for the staff to remove the plastic part completely and avoid the problems of jamming and inability to demold with tools. It is highly practical.

[0040] Combination Figure 1-6 As shown, the upper mold 2 of the logistics turnover box has a main injection hole 22, and the top forming plate 17 of the box has an injection pressure hole 23, which is connected to the main injection hole 22.

[0041] In this embodiment, during injection molding, the molten material is injected into the cavity through the main injection hole 22 and the injection pressure hole 23.

[0042] The working principle of this utility model is as follows:

[0043] During the injection molding process, the lower mold 1 and the upper mold 2 of the logistics turnover box are brought closer together, so that the end molding slider 9, the side molding slider 10, and the box top molding plate 17 respectively cooperate with the turnover box molding insert 4 in the main frame 3 of the turnover box to form a complete cavity. After the molten material is injected into the cavity to form the logistics turnover box plastic part, after the mold is opened, the upper mold 2 and the box top molding plate 17 are moved away from the turnover box molding insert 4 to open up the upper space, and then cooperate with... The side core-pulling rod moves the end molding slider 9 and the side molding slider 10 away from the main frame 3 of the turnover box through the side core-pulling rod groove 20 and the slide rod hole 21, opening up the side and end spaces. Then, the bottom core-pulling rod, in conjunction with the bottom core-pulling hole 19, pushes the turnover box molding insert 4 upward to remove the plastic part. This structure ensures sufficient space above and around the plastic part during demolding, facilitating the subsequent removal of the plastic part completely by subsequent workers, avoiding jamming and the inability to use tools for demolding. It is highly practical.

[0044] During injection molding, the end molding slider 9 and the side molding slider 10 respectively cooperate with the turnover box molding insert 4 to assist in molding the ends and sides of the plastic part. The end textured part 11 is used to simultaneously mold the end pattern of the plastic part, and the side textured part 12 is used to simultaneously mold the side pattern of the plastic part. No secondary processing is required, shortening the process. During mold closing, the first alignment protrusion 14 engages with the first alignment groove 13 to facilitate the alignment of the end molding slider 9 with high precision.

[0045] During mold closing, the second alignment protrusion 16 engages with the second alignment groove 15, facilitating the alignment of the side forming slider 10 with high precision.

[0046] During the injection molding process, the top molding plate 17 works in conjunction with the turnover box molding insert 4 to form the top structure of the plastic part. The textured part 18 on the top is used to simultaneously form the patterned structure of the top, eliminating the need for secondary processing and shortening the process.

[0047] During injection molding, molten material is injected into the mold cavity through the main injection hole 22 and the injection pressure hole 23.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0049] Although this document frequently uses terms such as lower mold 1 for logistics turnover box forming, upper mold 2 for logistics turnover box forming, main frame 3 for turnover box forming, insert 4 for turnover box forming, double slider forming assembly 5, top forming part 6, bottom core-pulling alignment part 7, side core-pulling alignment part 8, end forming slider 9, side forming slider 10, end texture part 11, side texture part 12, first alignment groove 13, first alignment protrusion 14, second alignment groove 15, second alignment protrusion 16, top forming plate 17, top texture part 18, bottom core-pulling hole 19, side core-pulling rod groove 20, rod hole 21, main injection hole 22, injection pressure hole 23, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes, comprising a lower mold (1) and an upper mold (2) for forming logistics turnover boxes, characterized in that, A main frame (3) for forming a turnover box is provided between the lower mold (1) and the upper mold (2) for forming a turnover box. A turnover box forming insert (4) is provided inside the main frame (3). A double slider forming assembly (5) and a box top forming part (6) are provided between the upper mold (2) and the main frame (3). A bottom core-pulling alignment part (7) is provided inside the lower mold (1). A side core-pulling alignment part (8) is provided inside the main frame (3). The bottom core-pulling alignment part (7) and the side core-pulling alignment part (8) are staggered. The side core-pulling alignment part (8) corresponds to the position of the double slider forming assembly (5).

2. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 1, characterized in that, The dual-slider forming assembly (5) includes an end forming slider (9) and a side forming slider (10) disposed between the upper mold (2) for forming the logistics turnover box and the main frame (3) for forming the turnover box. The end forming slider (9) and the side forming slider (10) are respectively positioned opposite to the turnover box forming insert (4).

3. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 2, characterized in that, The end forming slider (9) has an end textured part (11) on its inner side, and a forming gap is formed between the inner side of the end forming slider (9) and the turnover box forming insert (4).

4. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 3, characterized in that, The side forming slider (10) has a side textured part (12) on its inner side, and a forming gap is formed between the inner side of the side forming slider (10) and the turnover box forming insert (4).

5. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 4, characterized in that, The end forming slider (9) has a first alignment groove (13) at its bottom, and the turnover box forming main frame (3) has a first alignment protrusion (14), which engages with the first alignment groove (13).

6. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 5, characterized in that, The side forming slider (10) has a second alignment groove (15) at its bottom, and the turnover box forming main frame (3) has a second alignment protrusion (16), which engages with the second alignment groove (15).

7. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 6, characterized in that, The box top forming part (6) includes a box top forming plate (17) disposed between the upper mold (2) for forming the logistics turnover box and the main frame (3) for forming the turnover box, and the box top forming plate (17) has a box top textured part (18).

8. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 7, characterized in that, The bottom core-pulling alignment part (7) includes a plurality of bottom core-pulling holes (19) provided in the lower mold (1) for forming the logistics turnover box, and the bottom core-pulling holes (19) are directly opposite to the bottom of the turnover box forming insert (4).

9. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 8, characterized in that, The side core-pulling alignment part (8) includes several side core-pulling rod grooves (20) provided on the main frame (3) of the turnover box forming. The end forming slider (9) and the side forming slider (10) are provided with sliding rod holes (21). The side core-pulling rod grooves (20) and the sliding rod holes (21) are arranged opposite each other.

10. The double-slider secondary core-pulling mechanism for injection molds of plastic logistics turnover boxes according to claim 7, characterized in that, The upper mold (2) of the logistics turnover box has a main injection hole (22), and the top forming plate (17) of the box has an injection pressure hole (23), which is connected to the main injection hole (22).

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