In-mold cutting device for blowing mold

Abstract

The utility model relates to the technical field of blowing molds, in particular to a blowing mold in-mold cutting device which comprises a first blowing mold and a second blowing mold, a first blowing cavity is formed in the rear side of the first blowing mold, a first U-shaped groove is formed in the top of the first blowing mold, and a second U-shaped groove is formed in the bottom of the second blowing mold. A first blow molding opening is formed in the position, located in the middle of the rear side edge, of the bottom of the inner wall of the first U-shaped groove, a first lifting assembly is arranged in the first U-shaped groove, and a cutting assembly is arranged at the position, located at the bottom of the first U-shaped groove, of the front side of the first blow molding mold. According to the in-mold cutting device for the blow molding mold, after blow molding is completed, a first rectangular movable block in a first lifting assembly ascends, a second rectangular movable block in a second lifting assembly ascends, a movable rod of a hydraulic cylinder extends out, the hydraulic cylinder drives a movable plate to move backwards, and the movable plate drives a connecting plate and a cutter to move; and the formed plastic toy is cut by the cutter, so that the opening of the plastic toy is cut out.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding molds, in particular to a blow molding mold in-mold cutting device. Background Art

[0002] In the production of plastic toys, blow molding technology is a commonly used one. First, plastic particles are melted into liquid form and then blown into the desired shape of the plastic toy. After the blow-molded plastic toy is cooled and plasticized, it usually needs to be post-processed, which includes cutting the opening of the plastic toy. Since some toys in the production of plastic toys need to have an opening at one end, such as plastic toys with blowing nozzles, or toys that need to be filled with cotton or other fillers, it is necessary to cut the opening of the blow-molded toys.

[0003] In the existing production process, this opening cutting process mostly needs to be done manually. Manual cutting is not only inefficient and easily leads to production bottlenecks, but also has errors, which is not conducive to ensuring the cutting accuracy and toy shaping. Moreover, during the cutting process, manual operation may also damage the opening, affecting the integrity and aesthetics of the toy, and even causing harm to the operator such as slipping of the knife.

[0004] Therefore, how to achieve precise opening cutting of toys while improving cutting efficiency and safety has become an urgent problem to be solved in the current production of plastic toys. In view of this, we propose an in-mold cutting device for blow molds. Utility Model Content

[0005] The purpose of the utility model is to provide a blow mold in-mold cutting device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A blow mold in-mold cutting device comprises a first blow mold and a second blow mold, wherein a first blow molding cavity is formed at the rear side of the first blow molding cavity, a first U-shaped groove is formed at the top of the first blow molding cavity, a first blow molding port is formed at the bottom of the inner wall of the first U-shaped groove and at the middle of the rear edge, a first lifting assembly is formed in the first U-shaped groove, the first lifting assembly comprises a first rectangular movable block which can be adjusted up and down, a first blow molding connection port connected to the first blow molding port is formed at the rear side of the first rectangular movable block, and plastic particles are injected into the first blow molding cavity from the first blow molding connection port after being melted into liquid state;

[0008] A cutting assembly is provided at the front side of the first blow molding mold and at the bottom of the first U-shaped groove, and the cutting assembly includes a fixed horizontal plate fixedly connected to the front side of the first blow molding mold, a fixed vertical plate is provided on the top of the fixed horizontal plate, a hydraulic cylinder is provided on the front side of the fixed vertical plate, and the hydraulic cylinder is connected to an external hydraulic drive system for operation, a movable rod of the hydraulic cylinder passes through the front side of the fixed vertical plate and is fixedly connected to a movable plate, a connecting plate is detachably connected to the rear side of the movable plate by bolts, a cutting knife is provided at the bottom of the connecting plate, and the bottom of the cutting knife is in contact with the bottom of the inner wall of the first U-shaped groove. When the blow molding is completed, the first rectangular movable block in the first lifting assembly rises, the second rectangular movable block in the second lifting assembly rises, the movable rod of the hydraulic cylinder extends, the hydraulic cylinder drives the movable plate to move backward, and the movable plate drives the connecting plate and the cutting knife to move, so that the cutting knife cuts the molded plastic toy, thereby cutting out the opening of the plastic toy;

[0009] A second blow molding cavity is provided on the front side of the second blow molding mold, and the second blow molding cavity corresponds to the first blow molding cavity. A second U-shaped groove is provided on the top of the second blow molding mold. A second blow molding port is provided at the bottom of the inner wall of the second U-shaped groove and located in the middle of the front edge, and the second blow molding port corresponds to the first blow molding port. A second lifting assembly is provided in the second U-shaped groove, and the second lifting assembly includes a second rectangular movable block which can be adjusted up and down. A second blow molding connecting port connected to the second blow molding port is provided on the front side of the second rectangular movable block, and the second blow molding connecting port corresponds to the first blow molding connecting port to form a completed blow molding cavity.

[0010] Preferably, positioning columns are provided on the rear side of the first blow mold and near the four corners, and positioning grooves are provided on the front side of the second blow mold and near the four corners. The four positioning columns are respectively inserted into the four positioning grooves to connect the first blow mold and the second blow mold.

[0011] Preferably, a first strip mounting groove is provided at the bottom of the inner wall of the first U-shaped groove and near the front side, and a first strip cover is detachably connected to the first strip mounting groove by bolts. A first rectangular mounting groove is provided at the bottom of the inner wall of the first strip mounting groove and near the left and right ends, and the first strip cover can prevent dust and cutting debris from entering the first rectangular mounting groove.

[0012] Preferably, the first lifting assembly also includes two first electric telescopic rods, which are respectively installed in two first rectangular installation grooves. The movable rods of the first electric telescopic rods pass through the bottom of the first strip cover and are fixedly connected to the bottom of the first rectangular movable block. The first electric telescopic rods are connected to an external power supply to work, and the first rectangular movable block is driven to move up and down through the two first electric telescopic rods.

[0013] Preferably, a first U-shaped avoidance groove is provided on the front side of the first rectangular movable block, and when the movable rod of the hydraulic cylinder is retracted, the blade of the cutter is located in the first U-shaped avoidance groove.

[0014] Preferably, a second strip mounting groove is provided at the bottom of the inner wall of the second U-shaped groove and near the rear side, and a second strip cover is detachably connected to the second strip mounting groove by bolts. A second rectangular mounting groove is provided at the bottom of the inner wall of the second strip mounting groove and near the left and right ends, and the second strip cover can prevent dust and cutting debris from entering the second rectangular mounting groove.

[0015] Preferably, the second lifting assembly also includes two second electric telescopic rods, which are respectively installed in two second rectangular installation grooves. The movable rods of the second electric telescopic rods pass through the bottom of the second strip cover and are fixedly connected to the bottom of the second rectangular movable block. The second electric telescopic rods are connected to an external power supply to work, and the second rectangular movable block is driven to move up and down through the two second electric telescopic rods.

[0016] Preferably, a second U-shaped avoidance groove is provided on the rear side of the second rectangular movable block to facilitate workers to clean up debris generated by cutting.

[0017] Preferably, positioning rods are provided on the front side of the movable plate and near the left and right sides, and the front ends of the positioning rods penetrate the rear side of the fixed vertical plate, which is conducive to the stable forward and backward movement of the movable plate.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The blow mold in-mold cutting device, when blow molding is completed, the first rectangular movable block in the first lifting assembly rises, the second rectangular movable block in the second lifting assembly rises, the movable rod of the hydraulic cylinder extends, the hydraulic cylinder drives the movable plate to move backward, the movable plate drives the connecting plate and the cutter to move, so that the cutter cuts the molded plastic toy, thereby cutting out the opening of the plastic toy. Compared with manual cutting, the cutting efficiency and safety of the plastic toy opening are greatly improved.

[0020] 2. The blow mold in-mold cutting device drives the first rectangular movable block to move up and down through two first electric telescopic rods. During the blow molding process of the plastic toy, the movable rod of the first electric telescopic rod contracts, so that the bottom of the first rectangular movable block is tightly fitted with the bottom of the inner wall of the first U-shaped groove, thereby preventing the solution from seeping out from the joint between the first blow molding port and the first blow molding connection port. When it is necessary to open and cut the blow-molded plastic toy, the movable rod of the first electric telescopic rod extends to move the first rectangular movable block upward to avoid hindering the movement of the cutter.

[0021] 3. The in-mold cutting device of the blow mold drives the second rectangular movable block to move up and down through two second electric telescopic rods. During the blow molding process of the plastic toy, the movable rod of the second electric telescopic rod contracts, so that the bottom of the second rectangular movable block is tightly fitted with the bottom of the inner wall of the second U-shaped groove, thereby preventing the solution from seeping out from the joint between the second blow molding port and the second blow molding connecting port. When it is necessary to open and cut the blow-molded plastic toy, the movable rod of the second electric telescopic rod extends to move the second rectangular movable block upward to avoid hindering the movement of the cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the overall exploded structure of the utility model;

[0024] Figure 3 It is a schematic diagram of the assembly structure of the second blow mold and the second lifting assembly in the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the first blow molding mold in the utility model;

[0026] Figure 5 It is a schematic diagram of the assembly structure of the first blow molding mold and the first lifting assembly in the utility model;

[0027] Figure 6 This is a schematic diagram of the cutting assembly structure in the utility model;

[0028] Figure 7 It is a schematic diagram of the assembly structure of the movable plate and the connecting plate in the utility model.

[0029] In the figure: 1. first blow mold; 10. first blow molding cavity; 11. first blow molding port; 12. first U-shaped groove; 13. positioning column; 14. first rectangular mounting groove; 15. first strip mounting groove; 16. first strip cover; 2. second blow mold; 20. second blow molding cavity; 21. second blow molding port; 22. second U-shaped groove; 23. positioning groove; 24. second rectangular mounting groove; 25. second strip mounting groove; 26. second strip cover; 3. first lifting Assembly; 30, first electric telescopic rod; 31, first rectangular movable block; 310, first blow molding connection port; 311, first U-shaped avoidance groove; 4, second lifting assembly; 40, second electric telescopic rod; 41, second rectangular movable block; 410, second blow molding connection port; 411, second U-shaped avoidance groove; 5, cutting assembly; 50, fixed horizontal plate; 51, fixed vertical plate; 52, hydraulic cylinder; 53, movable plate; 54, connecting plate; 55, cutter; 56, positioning rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] See also Figure 1-Figure 7 , the utility model provides a technical solution:

[0033] A blow mold in-mold cutting device comprises a first blow mold 1 and a second blow mold 2, wherein a first blow molding cavity 10 is provided at the rear side of the first blow molding cavity 1, a first U-shaped groove 12 is provided at the top of the first blow molding cavity 1, a first blow molding port 11 is provided at the bottom of the inner wall of the first U-shaped groove 12 and at the middle of the rear edge, a first lifting assembly 3 is provided in the first U-shaped groove 12, the first lifting assembly 3 comprises a first rectangular movable block 31 which can be adjusted up and down, a first blow molding connection port 310 which is connected with the first blow molding port 11 is provided at the rear side of the first rectangular movable block 31, and plastic particles are injected into the first blow molding cavity 10 from the first blow molding connection port 310 after being melted into liquid state by heat;

[0034] A cutting assembly 5 is provided at the front side of the first blow mold 1 and at the bottom of the first U-shaped groove 12. The cutting assembly 5 includes a fixed horizontal plate 50 fixedly connected to the front side of the first blow mold 1. A fixed vertical plate 51 is provided on the top of the fixed horizontal plate 50. A hydraulic cylinder 52 is provided on the front side of the fixed vertical plate 51. The hydraulic cylinder 52 is connected to an external hydraulic drive system for operation. The movable rod of the hydraulic cylinder 52 passes through the front side of the fixed vertical plate 51 and is fixedly connected to a movable plate 53. The rear side of the movable plate 53 is detachably connected to a connecting plate 54 by bolts. A cutter 55 is provided at the bottom of the connecting plate 54. The bottom of the cutter 55 is fitted with the bottom of the inner wall of the first U-shaped groove 12. When the blow molding is completed, the first rectangular movable block 31 in the first lifting assembly 3 rises, the second rectangular movable block 41 in the second lifting assembly 4 rises, the movable rod of the hydraulic cylinder 52 extends, the hydraulic cylinder 52 drives the movable plate 53 to move backward, the movable plate 53 drives the connecting plate 54 and the cutter 55 to move, so that the cutter 55 cuts the molded plastic toy, thereby cutting out the opening of the plastic toy.

[0035] A second blow molding cavity 20 is provided on the front side of the second blow molding mold 2, and the second blow molding cavity 20 corresponds to the first blow molding cavity 10. A second U-shaped groove 22 is provided on the top of the second blow molding mold 2, and a second blow molding port 21 is provided at the bottom of the inner wall of the second U-shaped groove 22 and in the middle of the front edge, and the second blow molding port 21 corresponds to the first blow molding port 11. A second lifting assembly 4 is provided in the second U-shaped groove 22, and the second lifting assembly 4 includes a second rectangular movable block 41 which can be adjusted up and down. A second blow molding connecting port 410 which is connected to the second blow molding port 21 is provided on the front side of the second rectangular movable block 41, and the second blow molding connecting port 410 corresponds to the first blow molding connecting port 310, so as to form a completed blow molding cavity.

[0036] In this embodiment, positioning columns 13 are provided on the rear side of the first blow mold 1 and near the four corners, and positioning grooves 23 are provided on the front side of the second blow mold 2 and near the four corners. The four positioning columns 13 are respectively inserted into the four positioning grooves 23 to connect the first blow mold 1 and the second blow mold 2.

[0037] Specifically, a first strip mounting groove 15 is opened at the bottom of the inner wall of the first U-shaped groove 12 and near the front side, and a first strip cover plate 16 is detachably connected to the first strip mounting groove 15 by bolts. A first rectangular mounting groove 14 is opened at the bottom of the inner wall of the first strip mounting groove 15 and near the left and right ends. The first strip cover plate 16 can prevent dust and cutting debris from entering the first rectangular mounting groove 14.

[0038] Furthermore, the first lifting assembly 3 also includes two first electric telescopic rods 30, which are respectively installed in two first rectangular installation grooves 14. The movable rods of the first electric telescopic rods 30 pass through the bottom of the first strip cover 16 and are fixedly connected to the bottom of the first rectangular movable block 31. The first electric telescopic rods 30 are connected to an external power supply to work, and the first rectangular movable block 31 is driven up and down by the two first electric telescopic rods 30.

[0039] Furthermore, a first U-shaped avoidance groove 311 is formed on the front side of the first rectangular movable block 31 . When the movable rod of the hydraulic cylinder 52 is retracted, the blade of the cutter 55 is located in the first U-shaped avoidance groove 311 .

[0040] Furthermore, a second strip mounting groove 25 is provided at the bottom of the inner wall of the second U-shaped groove 22 and near the rear side, and a second strip cover plate 26 is detachably connected to the second strip mounting groove 25 by bolts. Second rectangular mounting grooves 24 are provided at the bottom of the inner wall of the second strip mounting groove 25 and near the left and right ends. The second strip cover plate 26 can prevent dust and cutting debris from entering the second rectangular mounting groove 24.

[0041] Furthermore, the second lifting assembly 4 also includes two second electric telescopic rods 40, which are respectively installed in two second rectangular installation grooves 24. The movable rods of the second electric telescopic rods 40 pass through the bottom of the second strip cover 26 and are fixedly connected to the bottom of the second rectangular movable block 41. The second electric telescopic rods 40 are connected to an external power supply to work, and the second rectangular movable block 41 is driven up and down by the two second electric telescopic rods 40.

[0042] Furthermore, a second U-shaped avoidance groove 411 is provided at the rear side of the second rectangular movable block 41 to facilitate workers to clean up the debris generated by cutting.

[0043] Furthermore, positioning rods 56 are provided on the front side of the movable plate 53 and near the left and right sides. The front end of the positioning rods 56 penetrates the rear side of the fixed vertical plate 51, which is conducive to the stable forward and backward movement of the movable plate 53.

[0044] When the blow mold in-mold cutting device of this embodiment is in use, when the blow molding operation of the plastic toy is being performed, the movable rod of the first electric telescopic rod 30 is contracted, so that the bottom of the first rectangular movable block 31 is tightly fitted with the bottom of the inner wall of the first U-shaped groove 12, so as to prevent the solution from seeping out from the joint between the first blow molding port 11 and the first blow molding connection port 310. Similarly, the movable rod of the second electric telescopic rod 41 is also in a contracted state, so that the bottom of the second rectangular movable block 41 is tightly fitted with the bottom of the inner wall of the second U-shaped groove 22, so as to prevent the solution from seeping out from the joint between the second blow molding port 21 and the second blow molding connection port 410. When cutting the opening of a blow-molded plastic toy, the movable rods of the two first electric telescopic rods 30 and the two second electric telescopic rods 40 are extended at the same time, so that the first rectangular movable block 31 and the second rectangular movable block 41 are raised to avoid hindering the cutter 55 from moving backward. Then the movable rod of the hydraulic cylinder 52 is extended, and the hydraulic cylinder 52 drives the movable plate 53 to move backward. The movable plate 53 drives the connecting plate 54 and the cutter 55 to move, so that the cutter 55 cuts the molded plastic toy, thereby cutting out the opening of the plastic toy. Compared with manual cutting, the cutting efficiency and safety of the plastic toy opening are greatly improved.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A blow mold in-mold cutting device, comprising a first blow mold (1) and a second blow mold (2), characterized in that: A first blow molding cavity (10) is provided on the rear side of the first blow molding mold (1), a first U-shaped groove (12) is provided on the top of the first blow molding mold (1), a first blow molding port (11) is provided at the bottom of the inner wall of the first U-shaped groove (12) and at a position located in the middle of the rear edge, a first lifting assembly (3) is provided in the first U-shaped groove (12), the first lifting assembly (3) comprises a first rectangular movable block (31) which can be adjusted up and down, a first blow molding connection port (310) which is connected to the first blow molding port (11) is provided on the rear side of the first rectangular movable block (31), a cutting assembly (5) is provided on the front side of the first blow molding mold (1) and at a position located at the bottom of the first U-shaped groove (12), the cutting assembly (5) comprises a fixed horizontal plate (50) fixedly connected to the front side of the first blow molding mold (1), a fixed vertical plate (51) is provided on the top of the fixed horizontal plate (50), and a hydraulic cylinder (52) is provided on the front side of the fixed vertical plate (51). ), the movable rod of the hydraulic cylinder (52) passes through the front side of the fixed vertical plate (51) and is fixedly connected to the movable plate (53), the rear side of the movable plate (53) is detachably connected to the connecting plate (54) by bolts, the bottom of the connecting plate (54) is provided with a cutter (55), the bottom of the cutter (55) is in contact with the bottom of the inner wall of the first U-shaped groove (12), the front side of the second blow molding mold (2) is provided with a second blow molding cavity (20), the top of the second blow molding mold (2) is provided with a second U-shaped groove (22), the bottom of the inner wall of the second U-shaped groove (22) and located at the middle of the front side edge is provided with a second blowing port (21), the second U-shaped groove (22) is provided with a second lifting assembly (4), the second lifting assembly (4) comprises a second rectangular movable block (41) which can be adjusted up and down, and the front side of the second rectangular movable block (41) is provided with a second blow molding connection port (410) which is connected with the second blow molding port (21).

2. The blow mold in-mold cutting device according to claim 1, characterized in that: Positioning posts (13) are provided on the rear side of the first blow mould (1) and near the four corners, and positioning grooves (23) are provided on the front side of the second blow mould (2) and near the four corners, and the four positioning posts (13) are respectively inserted into the four positioning grooves (23).

3. The in-mold cutting device for blow mold according to claim 1, characterized in that: A first strip-shaped mounting groove (15) is provided at the bottom of the inner wall of the first U-shaped groove (12) and close to the front side, a first strip-shaped cover plate (16) is detachably connected to the first strip-shaped mounting groove (15) via bolts, and first rectangular mounting grooves (14) are provided at the bottom of the inner wall of the first strip-shaped mounting groove (15) and close to the left and right ends.

4. The in-mold cutting device for blow mold according to claim 3, characterized in that: The first lifting assembly (3) further comprises two first electric telescopic rods (30), the two first electric telescopic rods (30) being respectively installed in two first rectangular installation grooves (14), and the movable rods of the first electric telescopic rods (30) passing through the bottom of the first strip cover plate (16) and being fixedly connected to the bottom of the first rectangular movable block (31).

5. The blow mold in-mold cutting device according to claim 1, characterized in that: A first U-shaped avoidance groove (311) is provided on the front side of the first rectangular movable block (31), and when the movable rod of the hydraulic cylinder (52) is retracted, the blade of the cutter (55) is located in the first U-shaped avoidance groove (311).

6. The in-mold cutting device for blow mold according to claim 1, characterized in that: A second strip-shaped mounting groove (25) is provided at the bottom of the inner wall of the second U-shaped groove (22) and close to the rear side, a second strip-shaped cover plate (26) is detachably connected to the second strip-shaped mounting groove (25) via bolts, and second rectangular mounting grooves (24) are provided at the bottom of the inner wall of the second strip-shaped mounting groove (25) and close to the left and right ends.

7. The in-mold cutting device for blow mold according to claim 6, characterized in that: The second lifting assembly (4) further comprises two second electric telescopic rods (40), the two second electric telescopic rods (40) being respectively installed in two second rectangular installation grooves (24), and the movable rods of the second electric telescopic rods (40) passing through the bottom of the second strip cover plate (26) and being fixedly connected to the bottom of the second rectangular movable block (41).

8. The blow mold in-mold cutting device according to claim 1, characterized in that: A second U-shaped avoidance groove (411) is provided on the rear side of the second rectangular movable block (41).

9. The blow mold in-mold cutting device according to claim 1, characterized in that: Positioning rods (56) are provided on the front side of the movable plate (53) and near the left and right sides, and the front end of the positioning rods (56) penetrates the rear side of the fixed vertical plate (51).

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