Packaging box injection molding demolding mechanism

Abstract

The utility model relates to a packing box injection molding demoulding mechanism which comprises a fixed mould, a movable mould, an ejection auxiliary part and a spring, the fixed mould comprises a base, a mould core is formed in the center of the base, and at least one side of the mould core is provided with a guide structure fixedly connected with the base. The movable mold comprises a mold body, a first cavity matched with the mold core is formed in the center of the mold body, and an ejector pin capable of stretching into or stretching out of the first cavity is arranged on the side, opposite to the fixed mold, of the mold body. And the ejection auxiliary part comprises a template arranged between the base and the mold body. In the demolding process after injection molding and cooling of the packaging box, the formed product can be separated from the fixed mold along with the movable mold through movement of the ejection auxiliary part, the situation that demolding and subsequent injection molding operation are affected due to the fact that the injection-molded packaging box adheres to the fixed mold is avoided, and in addition, the injection-molded packaging box can be ejected out through the ejector pin and separated from the movable mold; therefore, the demoulding operation is completed.

Description

Technical Field

[0001] This utility model relates to the field of packaging box injection molding technology, specifically a packaging box injection molding demolding mechanism. Background Technology

[0002] In the manufacturing of plastic boxes, plastic raw material granules are heated and melted before being added to a mold. After cooling and solidification, the molded product is then demolded. In the injection molding process of packaging boxes, the traditional demolding method often relies on ejector pins to directly eject the molded product from the mold.

[0003] However, this method has a significant drawback: the molded product may stick to the fixed mold due to factors such as the surface finish of the mold and the temperature control of the mold, preventing it from moving smoothly with the moving mold and ultimately being ejected by the ejector pins. This sticking phenomenon not only affects the normal demolding and dropping of the molded product, but also affects subsequent injection molding operations, thereby reducing production efficiency. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This invention provides a packaging box injection molding demolding mechanism, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a packaging box injection molding demolding mechanism, comprising a fixed mold, a moving mold, an ejection auxiliary part, and a spring. The fixed mold includes a base, a core formed at the center of the base, and a guide structure fixedly connected to the base on at least one side of the core. The moving mold includes a mold body, a first cavity formed at the center of the mold body to cooperate with the core, and an ejector pin extending into or out of the first cavity on the side of the mold body facing away from the fixed mold. The ejection auxiliary part includes a template disposed between the base and the mold body, a second cavity formed at the center of the template to cooperate with the core, and a connecting structure movably cooperating with the guide structure on at least one side of the template. The spring is disposed between the fixed mold and the ejection auxiliary part, and both ends of the spring are fixedly connected to the base and the template, respectively. The position of the ejection auxiliary part is adjusted by the elastic deformation of the spring and the cooperation between the guide structure and the connecting structure.

[0008] Preferably, the guiding structure includes a limiting bracket that is fixed to the base by bolts, and the limiting bracket has a limiting guide groove that penetrates the limiting bracket.

[0009] In a further preferred embodiment, the connecting structure includes a screw and a nut, one end of the screw being threadedly connected to the template, the other end of the screw passing through an adjacent limiting guide groove, the nut being sleeved on the screw and threadedly connected thereto, and the nut and the template being respectively disposed on opposite sides of the limiting bracket, the diameter of the screw being adapted to the width of the limiting guide groove, and the diameter of the screw being smaller than the length of the limiting guide groove.

[0010] In a further preferred embodiment, the base has a mounting groove, the template has a slot, the mounting groove and the slot are coaxially distributed, and the two ends of the spring extend into the mounting groove and the slot respectively.

[0011] In a further preferred embodiment, the moving mold further includes a movable seat, several sliding grooves, and support columns. The movable seat and the mold body are connected and fixed by the support columns. Several sliding grooves are formed at the end corners of the movable seat. The ejector pin is movably disposed between the mold body and the movable seat. The base has a number of guide rods equal to the number of sliding grooves. Several guide rods pass through adjacent sliding grooves respectively, so that the moving mold and the fixed mold are slidably connected.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a packaging box injection molding demolding mechanism, which has the following features:

[0014] Beneficial effects:

[0015] In this invention, the coordinated arrangement of the fixed mold, moving mold, ejection auxiliary part, and spring allows the packaging box to be demolded after injection molding and cooling. The ejection auxiliary part's movement separates the molded product from the fixed mold along with the moving mold, preventing the injection-molded packaging box from sticking to the fixed mold and affecting demolding and subsequent injection molding operations. Additionally, ejector pins can be used to eject the injection-molded packaging box and separate it from the moving mold, thus completing the demolding process. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of the packaging box injection molding and demolding mechanism according to the implementation plan;

[0017] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the injection molding and demolding mechanism for the packaging box from another angle;

[0018] Figure 3 for Figure 1 and Figure 2 A schematic diagram of the structure of the injection molding and demolding mechanism for the packaging box when used in combination.

[0019] In the diagram: 10. Fixed mold; 11. Base; 12. Core; 13. Guide rod; 14. Limiting bracket; 15. Mounting slot; 16. Limiting guide slot; 20. Moving mold; 21. Movable seat; 22. Slide groove; 23. Support column; 24. Mold body; 25. First cavity; 26. Ejector pin; 30. Ejection auxiliary part; 31. Template; 32. Second cavity; 33. Screw; 34. Nut; 35. Slot; 40. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 A packaging box injection molding demolding mechanism includes a fixed mold 10, a movable mold 20, an ejection auxiliary part 30, and a spring 40. After injection molding and cooling, the ejection auxiliary part 30 is positioned between the fixed mold 10 and the movable mold 20, and the ejection auxiliary part 30 and the fixed mold 10 are connected by the spring 40. The ejection auxiliary part 30 and the movable mold 20 cooperate with the fixed mold 10 for injection molding. After injection molding and cooling, the drive device can move the movable mold 20 away from the fixed mold 10. At this time, the ejection auxiliary part 30 can also move away from the fixed mold 10 by utilizing the elastic deformation of the spring 40, thereby pushing the molded packaging box to separate it from the fixed mold 10. Then, after the movable mold 20 moves to a certain distance away from the ejection auxiliary part 30, the injection-molded packaging box can be ejected from the movable mold 20 to complete the demolding operation.

[0022] In this embodiment, the fixed mold 10 includes a base 11, with a core 12 formed at the center of the base 11. A gate is provided at the center of the core 12 for injecting molten plastic. At least one side of the core 12 is provided with a guide structure fixedly connected to the base 11. The guide structure is used to cooperate with the limiting movement of the ejection auxiliary part 30. A mounting groove 15 is also formed on the base 11 for positioning and mounting the spring 40. A number of guide rods 13 are formed on the base 11, equal to the number of slide grooves 22 in the moving mold 20. Several guide rods 13 pass through adjacent slide grooves 22, causing the moving mold 20 and the fixed mold 10 to slide together, thereby guiding the movement of the moving mold 20.

[0023] In this embodiment, the moving mold 20 includes a mold body 24, and a first cavity 25 that mates with the core 12 is formed at the center of the mold body 24; the ejection auxiliary part 30 includes a template 31 disposed between the base 11 and the mold body 24, and a second cavity 32 that mates with the core 12 is formed at the center of the template 31; the first cavity 25 and the second cavity 32 together form a complete cavity that mates with the core 12 for injection molding.

[0024] In this embodiment, the moving mold 20 further includes a movable seat 21, several slides 22, support pillars 23, and ejector pins 26. The movable seat 21 and the mold body 24 are connected and fixed by the support pillars 23. An ejector pin 26, which can extend into or out of the first cavity 25, is provided on the side of the mold body 24 facing away from the fixed mold 10. The ejector pin 26 is movably disposed between the mold body 24 and the movable seat 21, and is used to finally eject the injection-molded packaging box. Several slides 22 are formed at the end corners of the movable seat 21 and are used to cooperate with the guide rods 13.

[0025] In this embodiment, at least one side of the template 31 has a connection structure that movably engages with the guide structure, and a slot 35 is formed on the template 31. The mounting groove 15 and the slot 35 are coaxially distributed. The two ends of the spring 40 extend into the mounting groove 15 and the slot 35, respectively, and are fixedly connected to the base 11 and the template 31, respectively.

[0026] In this embodiment, the connecting structure includes a screw 33 and a nut 34. One end of the screw 33 is threadedly connected to the template 31, and the other end of the screw 33 passes through an adjacent limiting guide groove 16. The diameter of the screw 33 is adapted to the width of the limiting guide groove 16, and the diameter of the screw 33 is smaller than the length of the limiting guide groove 16, thereby allowing the screw 33 to move along its length within the limiting guide groove 16. The nut 34 is sleeved on the screw 33 and threadedly connected to it, and the nut 34 and the template 31 are respectively disposed on opposite sides of the limiting bracket 14. The nut 34 is used to limit the movement from the side, preventing the connecting structure from shifting left or right.

[0027] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A packaging box injection molding demolding mechanism comprising a fixed mold (10) and a movable mold (20), characterized in that, Further comprising an ejection auxiliary part (30) and a spring (40), The fixed mold (10) comprises a base (11), a core (12) is formed at the center of the base (11), and at least one side of the core (12) is provided with a guide structure fixedly connected with the base (11); The movable mold (20) comprises a mold body (24), a first cavity (25) matched with the core (12) is formed at the center of the mold body (24), and a ejector pin (26) capable of extending into or out of the first cavity (25) is arranged on the side of the mold body (24) away from the fixed mold (10); The ejection auxiliary part (30) comprises a mold plate (31) arranged between the base (11) and the mold body (24), a second cavity (32) matched with the core (12) is formed at the center of the mold plate (31), and a connecting structure movably matched with the guide structure is formed on at least one side of the mold plate (31); The spring (40) is arranged between the fixed mold (10) and the ejection auxiliary part (30), and the two ends of the spring (40) are fixedly connected with the base (11) and the mold plate (31) respectively, and the position state of the ejection auxiliary part (30) is adjusted by the elastic deformation of the spring (40) and the cooperation between the guide structure and the connecting structure.

2. The injection molding demolding mechanism for a packaging box according to claim 1, characterized in that: The guide structure comprises a limiting support (14) fixedly connected with the base (11) by bolts, and a limiting guide groove (16) penetrating through the limiting support (14) is formed on the limiting support (14).

3. The injection molding demolding mechanism of a packaging box according to claim 2, characterized in that: The connecting structure comprises a screw rod (33) and a nut (34), one end of the screw rod (33) is threadedly connected with the mold plate (31), the other end of the screw rod (33) penetrates through the adjacent limiting guide groove (16), the nut (34) is sleeved on the screw rod (33) and is threadedly connected with the screw rod (33), and the nut (34) and the mold plate (31) are arranged on the opposite sides of the limiting support (14) respectively.

4. The injection molding demolding mechanism of a packaging box according to claim 3, characterized in that: The diameter of the screw rod (33) is matched with the width of the limiting guide groove (16), and the diameter of the screw rod (33) is smaller than the length of the limiting guide groove (16).

5. The injection molding demolding mechanism of a packaging box according to any one of claims 1-4, characterized in that: An installation groove (15) is formed on the base (11), an insertion groove (35) is formed on the mold plate (31), the installation groove (15) and the insertion groove (35) are coaxially distributed, and the two ends of the spring (40) respectively extend into the installation groove (15) and the insertion groove (35).

6. The injection molding demolding mechanism of a packaging box according to any one of claims 1-4, characterized in that: The movable mold (20) further comprises a movable seat (21), a plurality of sliding grooves (22) and support columns (23), the movable seat (21) and the mold body (24) are fixedly connected through the support columns (23), the plurality of sliding grooves (22) are formed at the corner of the movable seat (21), and the ejector pin (26) is movably arranged between the mold body (24) and the movable seat (21).

7. The injection molding ejection mechanism for a packaging box according to claim 6, characterized in that: A number of guide rods (13) equal to the number of sliding grooves (22) are formed on the base (11), the plurality of guide rods (13) respectively penetrate through the adjacent sliding grooves (22), and the movable mold (20) is slidably connected with the fixed mold (10).

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