Flipper mechanism lower knife assembly for a thermoforming machine

Abstract

The utility model relates to a lower knife device of turnover mould mechanism of plastic product thermoforming machine, is equipped with the knife hole of being equipped with the lower knife cylinder mould cooperation sleeve setting into for distributing arrangement of lower knife plate, is provided with the cooling channel of cooling liquid flow through in lower knife plate, and the cooling channel is respectively configured with the liquid outlet and the back liquid port on the side hole wall of each knife hole, the upper sealing structure and the lower sealing structure are respectively arranged between the outer ring of lower knife cylinder mould and the side hole wall of knife hole, and the lower knife cylinder mould and knife hole leave the knife cylinder unit cooling annular cavity, and the upper sealing structure and the lower sealing structure are located the upper and lower ends of knife cylinder unit cooling annular cavity. Among them, the lower knife cylinder mould can be installed in the knife hole, and the knife cylinder unit cooling annular cavity is formed for the cooling liquid circulation around in the periphery of lower knife cylinder mould in the knife hole, and the lower knife cylinder mould is set into the knife hole and is cooled in cooperation; the service life of the lower knife cylinder mould can be improved after cooling, and the cutting effect is also improved after cooling, and the relatively smooth incision is not prone to hair, burr and other conditions.

Description

Technical Field

[0001] This utility model relates to a flipping mold mechanism of a plastic thermoforming machine, and particularly to its cutting device. Background Technology

[0002] In the flipping mold mechanism and upper mold mechanism of a plastic thermoforming machine, the flipping mold mechanism has a lower cutting device that works in conjunction with the upper cutting device in the upper mold mechanism to cut plastic products (such as cups). The heated plastic sheet is fed between the flipping mold mechanism and the upper mold mechanism for molding and cutting. It has been found that the lower cutting device has a short service life and needs to be replaced frequently, which is troublesome and increases costs. In addition, the flipping mold mechanism and the upper mold mechanism cooperate to form and cut each time. The number of plastic products (such as cups) produced in each mold closing can be increased by increasing the plate size. Although this increases the number of plastic products, the cut edges of the plastic products in the middle area (such as the edge of the cup) have burrs and rough edges, while the plastic products in the left and right sides are relatively better. Utility Model Content

[0003] In view of the technical problems existing in the background art, the present invention aims to provide a cutting device for the flipping mold mechanism of a plastic product thermoforming machine that can improve the service life of the cutting tool and make the cut of the plastic product relatively smooth.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the lowering device of the flipping mold mechanism of the plastic product thermoforming machine includes a lowering plate, and the lowering plate is provided with mounting holes for the lowering die cylinder to be fitted and inserted. The lowering plate is characterized in that: a cooling channel for coolant to flow is provided inside the lowering plate, and the cooling channel is provided with an outlet and a return port on the side wall of each mounting hole; an upper sealing structure and a lower sealing structure are respectively provided between the outer ring of the lower die cylinder and the side wall of the mounting hole; a cooling annular cavity for the die cylinder unit is left between the lower die cylinder and the mounting hole; the upper sealing structure and the lower sealing structure are located at the upper and lower ends of the cooling annular cavity for the die cylinder unit; and the outlet and the return port are located between the upper sealing structure and the lower sealing structure.

[0005] The following optimizations or supplementary explanations can be made to the above technical solutions.

[0006] The outlet and return port of the cooling channel are connected to the cooling annular cavity of the cutter barrel unit.

[0007] The upper end of the lower die cylinder is provided with a lower cutting edge.

[0008] For example, the upper sealing structure includes an upper sealing ring, the lower sealing structure includes a lower sealing ring, the upper part of the outer ring of the lower die has an upper annular groove, and the upper sealing ring is disposed in the upper annular groove; the lower part of the outer ring of the lower die has a lower annular groove, and the lower sealing ring is disposed in the lower annular groove.

[0009] In addition, the outer ring of the lower cutter barrel mold is also provided with a cavity convex ring, which divides the cooling annular cavity of the cutter barrel unit into several areas, each area is equipped with a corresponding liquid outlet and liquid return port; a fitting clearance is left between the cavity convex ring and the side hole wall of the cutter mounting hole.

[0010] In addition, the sidewalls of each tool hole are provided with corresponding liquid passage grooves at the positions of the liquid outlet and the liquid return port, respectively, with the liquid outlet and the liquid return port set in their respective corresponding liquid passage grooves.

[0011] For example, the cooling channel includes a liquid flow branch, and the lower blade plate has tool mounting holes arranged in the tool mounting area. The liquid flow branch runs through the tool mounting area and connects to the corresponding tool mounting holes. The liquid outlet and return outlet are arranged at the junction of the liquid flow branch and the tool mounting holes.

[0012] For example, the cooling channel includes a main inlet channel and a main outlet channel, with branch outlet channels connecting between the main inlet channel and the main outlet channel; the main inlet channel and the main outlet channel are located on the front and rear sides of the tool mounting area, respectively, with the main inlet channel and the main outlet channel arranged horizontally and the branch outlet channels arranged vertically.

[0013] Furthermore, the design is optimized so that the liquid outlet and return port on the side wall of each tool mounting hole are arranged in at least one set in the upper and lower layers. The liquid passage groove corresponding to the uppermost set of liquid outlet and return port increases in vertical distance from the left and right sides towards the middle of the tool mounting area. The liquid outlet and return port on the side wall of each tool mounting hole are arranged in two locations on the left and right sides.

[0014] Each tool mounting hole is configured with two fluid flow branches, one on the left and one on the right. The tool mounting holes are arranged in a staggered manner in the front and rear rows of the tool mounting area of ​​the lower tool plate.

[0015] The beneficial effects of this utility model are as follows: In the lower cutting device of the flipping mold mechanism of the plastic product thermoforming machine, the lower cutting cylinder mold can be installed in the cutting hole, and a cooling annular cavity is formed around the lower cutting cylinder mold in the cutting hole for coolant to circulate and cool the lower cutting cylinder mold fitted into the cutting hole. During the thermoforming process, the lower cutting cylinder mold cooperates in cutting. After cooling, the service life of the lower cutting cylinder mold can be improved. In addition, the cutting effect of the lower cutting cylinder mold is also improved after cooling, and the cut is relatively smooth and less prone to burrs and rough edges. Furthermore, the cooling channel is set inside the lower cutting plate, and the liquid outlet and return outlet are located on the side wall of the cutting hole, forming an internal water channel structure. This has little impact on other parts of the flipping mold mechanism, and the structural layout is reasonable and relatively compact. Moreover, it can still be well adapted after disassembling and replacing the lower cutting cylinder mold, making it more practical and having little impact on the water channel structure. Attached Figure Description

[0016] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0017] Figure 1 This is a top view of the structure of this utility model.

[0018] Figure 2 for Figure 1 Sectional view of AA.

[0019] Figure 3 for Figure 1 3D schematic diagram.

[0020] Figure 4 This is a schematic diagram of the structure of the lower blade cylinder mold assembled in the tool mounting hole of the lower blade plate in this utility model.

[0021] In the picture: 1. Lower blade plate; 11. Tool mounting hole; 14. Tool mounting area; 21. Liquid outlet; 22. Liquid return outlet; 23. Liquid passage groove; 26. Liquid flow branch; 3. Lower die cylinder; 35. Partition ring; 4. Cooling annular cavity for the cutter barrel unit; 41. Upper sealing structure; 42. Lower sealing structure. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Referring to the accompanying drawings, in this embodiment, the lowering device of the flipping mold mechanism of the plastic product thermoforming machine includes a lowering plate 1. The lowering plate 1 is provided with mounting holes 11 for the lowering cylinder mold 3 to be fitted and inserted. The lowering plate 1 is provided with a cooling channel for coolant to flow through. The cooling channel is provided with a liquid outlet 21 and a liquid return port 22 on the side wall of each tool mounting hole 11. The liquid outlet 21 allows the coolant to flow out from the cooling channel into the tool mounting hole 11, and the liquid return port 22 allows the coolant to be discharged from the tool mounting hole 11 back into the cooling channel. An upper sealing structure 41 and a lower sealing structure 42 are respectively provided between the outer ring (i.e., outer wall) of the lower die cylinder 3 and the side wall of the tool mounting hole 11. A cooling annular cavity 4 for the cutter barrel unit is provided between the lower cutter barrel mold 3 and the tool mounting hole 11. The upper sealing structure 41 and the lower sealing structure 42 are located at the upper and lower ends of the cooling annular cavity 4. The liquid outlet 21 and the liquid return port 22 are located between the upper sealing structure 41 and the lower sealing structure 42. The liquid outlet 21 and the liquid return port 22 of the cooling channel are respectively connected to the cooling annular cavity 4 of the cutter barrel unit. When the coolant flows from the cooling channel to the tool mounting hole 11, it will be located in the cooling annular cavity 4 of the cutter barrel unit. The coolant surrounds the lower cutter barrel mold 3 in the cooling annular cavity 4 of the cutter barrel unit for cooling. The liquid return port 22 allows the coolant to be discharged from the cooling annular cavity 4 of the cutter barrel unit and return to the cooling channel.

[0024] In the lower cutting device of the flipping mold mechanism of this plastic product thermoforming machine, the lower cutting cylinder mold 3 can be installed in the cutting hole 11. A cooling annular cavity 4 is formed around the lower cutting cylinder mold 3 in the cutting hole 11, allowing coolant to circulate and cool the lower cutting cylinder mold 3 fitted into the cutting hole 11. During thermoforming, the lower cutting cylinder mold 3 assists in cutting. After cooling, the service life of the lower cutting cylinder mold 3 is improved. Furthermore, the cutting effect of the lower cutting cylinder mold 3 is also improved after cooling, resulting in smoother cuts less prone to burrs and rough edges. In addition, the cooling channel is located inside the lower cutting plate 1, and the liquid outlet 21 and liquid return port 22 are located on the side wall of the cutting hole 11, forming an internal water channel structure. This has minimal impact on other parts of the flipping mold mechanism, resulting in a reasonable and relatively compact structural layout. Moreover, it can still be well-adapted after disassembling and replacing the lower cutting cylinder mold 3, making it more practical and having minimal impact on the water channel structure.

[0025] Based on the above embodiments, the following optimizations or further explanations can be made.

[0026] The upper end of the lower die cylinder 3 is the lower cutting edge, which is used for cutting.

[0027] For example, the upper sealing structure 41 includes an upper sealing ring, and the lower sealing structure 42 includes a lower sealing ring, both of which can be O-rings. The upper part of the outer ring of the lower cutter cylinder mold 3 has an upper annular groove, in which the upper sealing ring is positioned; the lower part of the outer ring of the lower cutter cylinder mold 3 has a lower annular groove, in which the lower sealing ring is positioned, facilitating sealing ring assembly and improving stability during operation. The upper and lower parts of the cutter cylinder mold 3 are respectively provided with externally protruding ring portions to form a cooling annular cavity 4 for the cutter cylinder unit in the cutter mounting hole 11, with the upper and lower annular grooves respectively located on the externally protruding ring portions.

[0028] Further optimization is possible. The outer ring of the lower blade cylinder mold 3 is also provided with a cavity-separating convex ring 35. The cavity-separating convex ring 35 divides the cooling annular cavity 4 of the blade cylinder unit into several regions. Each region is equipped with a corresponding liquid outlet 21 and liquid return port 22. That is, each region has a corresponding liquid outlet 21 and liquid return port 22. There is a fitting gap between the cavity-separating convex ring 35 and the side hole wall (i.e., inner wall) of the blade mounting hole 11. The cavity-separating convex ring 35 divides the cooling annular cavity 4 of the blade cylinder unit into multiple regions. The liquid in each region flows more smoothly from the liquid outlet 21 to the liquid return port 22, improving the flow efficiency and the cooling effect. In addition, the cavity-separating convex ring 35 can also improve the blade strength of the lower blade cylinder mold 3 itself and the support stability when fitted into the blade mounting hole 11, thereby improving the service life and cutting effect of the lower blade cylinder mold 3.

[0029] Furthermore, optimization is possible. Each tool mounting hole 11 has corresponding liquid-passing grooves 23 at the positions of the liquid outlet 21 and the liquid return port 22. The liquid outlet 21 and the liquid return port 22 are respectively located in their respective liquid-passing grooves 23. The liquid outlet 21 outputs coolant at the liquid-passing groove 23, resulting in more dispersed and efficient coolant distribution into the cooling annular cavity 4 of the tool barrel unit more quickly. The liquid return port 22 returns coolant at the liquid-passing groove 23, resulting in more efficient and wider coolant flow. This also avoids the problem of insufficient coolant flow in the tool barrel unit cooling annular cavity 4 due to the lower tool barrel mold 3 being too close to the tool mounting hole 11 in a compact structure.

[0030] For example, the cooling channel includes a liquid flow branch 26. The lower blade plate 1 has blade mounting holes 11 arranged in the blade mounting area 14. The liquid flow branch 26 runs through the blade mounting area 14 and connects to the corresponding blade mounting holes 11. The liquid outlet 21 and return port 22 are arranged at the junction of the liquid flow branch 26 and the blade mounting holes 11. When passing through the liquid flow branch 26, the liquid can pass through the blade mounting holes 11, enter the blade mounting holes 11 through the liquid outlet 21, and exit from the blade mounting holes 11 through the liquid outlet 21. This structural layout is reasonable and facilitates the installation of the cooling channel, forming a water channel structure. The cooling channel includes a main liquid inlet and a main liquid outlet. The liquid flow branch 26 is connected between the main liquid inlet and the main liquid outlet. After being supplied through the main liquid inlet, the coolant flows through the liquid flow branch 26 and then exits through the main liquid outlet. The main liquid inlet and the main liquid outlet can be located on the front and rear sides of the blade mounting area 14 respectively. For example, the main inlet and outlet channels are set horizontally, while the 26 branch channels are set vertically, and there are many different arrangements.

[0031] In addition, the liquid outlets 21 and return ports 22 on the side walls of each blade mounting hole 11 are arranged in at least one set in vertical layers, which is relatively good and can effectively cool the upper and lower positions of the lower blade mold 3, and even cool the area in sections. Each layer usually corresponds to the area separated by the cavity protrusion 35. Among them, the liquid-passing grooves 23 corresponding to the uppermost set of liquid outlets 21 and return ports 22 have a larger vertical distance (i.e., the vertical height dimension and vertical span of the groove) from the left and right sides to the middle of the blade mounting area 14, forming a structure that is larger in the middle and smaller on the left and right sides. This can specifically enhance the cooling effect on the lower blade mold 3 in the relatively central position in the same water channel structure, and improve the problem of poor cutting effect and burrs in the middle position of the lower blade plate 1 when the plate area is larger and the number of blade mounting holes 11 increases. In addition, the uppermost liquid outlets 21 and return ports 22 are close to the lower blade edge, and have a relatively larger impact than other layers. Furthermore, each tool mounting hole 11 has two outlets 21 and two return ports 22 on its sidewalls; for example, each tool mounting hole 11 has three outlets 21 (top, middle, and bottom) and three return ports 22 (top, middle, and bottom) on its left and right sides, respectively, resulting in a total of six outlets 21 and six return ports 22 on the sidewalls of each tool mounting hole 11, corresponding one-to-one. Even more significantly, the uppermost liquid-passing groove 23 has a larger vertical dimension than the liquid-passing grooves 23 in the layers below. The dimensions of the outlets 21 and return ports 22 are typically matched to those of the liquid-passing grooves 23.

[0032] In this configuration, the outlet 21 and return outlet 22 on the same layer correspond to a main inlet and a main outlet. Each blade mounting hole 11 is equipped with two branch outlets 26 on the left and right sides. The branch outlets 26 connecting the main inlet and the main outlet can connect the outlets 21 and return outlets 22 on the numerous blade mounting holes 11 on the branch outlets in series. The blade mounting holes 11 can be staggered and arranged in the front and rear rows of the blade mounting area 14 of the lower blade plate 1.

Claims

1. A lowering device for the flipping mold mechanism of a plastic thermoforming machine, comprising a lowering plate (1), wherein the lowering plate (1) is provided with mounting holes (11) for the lowering die cylinder (3) to be fitted and inserted, characterized in that: The lower blade (1) is provided with a cooling channel for coolant circulation. The cooling channels are provided with liquid outlets (21) and liquid return ports (22) on the side walls of each tool mounting hole (11). An upper sealing structure (41) and a lower sealing structure (42) are respectively provided between the outer ring of the lower die cylinder (3) and the side wall of the tool mounting hole (11). A cooling annular cavity (4) for the cutter barrel unit is left between the lower cutter barrel mold (3) and the cutter mounting hole (11). The upper sealing structure (41) and the lower sealing structure (42) are located at the upper and lower ends of the cooling annular cavity (4) of the knife barrel unit. The liquid outlet (21) and the liquid return outlet (22) are located between the upper sealing structure (41) and the lower sealing structure (42); The outlet (21) and return outlet (22) of the cooling channel are connected to the cooling annular cavity (4) of the cutter barrel unit, respectively.

2. The cutting device of the flipping mold mechanism of the plastic product thermoforming machine as described in claim 1, characterized in that: The upper end of the lower die cylinder (3) is provided with a lower cutting edge.

3. The cutting device of the flipping mold mechanism of the plastic product thermoforming machine as described in claim 1, characterized in that: The upper sealing structure (41) includes an upper sealing ring, and the lower sealing structure (42) includes a lower sealing ring. The upper part of the outer ring of the lower die cylinder (3) is provided with an upper annular groove, and the upper sealing ring is disposed in the upper annular groove; The lower part of the outer ring of the lower die cylinder (3) is provided with a lower annular groove, and the lower sealing ring is disposed in the lower annular groove.

4. The cutting device of the flipping mold mechanism of the plastic product thermoforming machine as described in claim 1, characterized in that: The outer ring of the lower cutter barrel mold (3) is also provided with a cavity convex ring (35). The cavity convex ring (35) divides the upper and lower cooling annular cavity (4) of the cutter barrel unit into several areas, and each area is equipped with a corresponding liquid outlet (21) and liquid return port (22). A fitting clearance is left between the cavity protrusion (35) and the side wall of the tool hole (11).

5. The cutting device of the flipping mold mechanism of the thermoforming machine for plastic products as described in claim 1, characterized in that: Each tool hole (11) has a corresponding liquid passage groove (23) on its side wall at the liquid outlet (21) and liquid return port (22). The liquid outlet (21) and liquid return port (22) are respectively located in their respective liquid passage grooves (23).

6. The cutting device of the flipping mold mechanism of the plastic product thermoforming machine as described in claim 1, characterized in that: The cooling channel includes liquid flow branches (26). The lower blade plate (1) has tool loading holes (11) arranged in the tool loading area (14). The liquid flow branch (26) runs through the knife loading area (14) and connects to the corresponding knife loading hole (11). The liquid outlet (21) and the liquid return port (22) are arranged at the junction of the liquid flow branch (26) and the knife loading hole (11).

7. The cutting device of the flipping mold mechanism of the plastic product thermoforming machine as described in claim 6, characterized in that: The cooling system includes a main inlet channel and a main outlet channel. The liquid-carrying branch (26) is connected between the liquid-inlet main line and the liquid-outlet main line; The main inlet and outlet channels are located on the front and rear sides of the tool loading area (14), respectively. The main inlet and outlet channels are set horizontally, while the branch channels (26) are set vertically.

8. The cutting device of the flipping mold mechanism of the thermoforming machine for plastic products as described in claim 5, characterized in that: Each tool mounting hole (11) has at least one set of liquid outlets (21) and liquid return ports (22) arranged in upper and lower layers on its sidewall. The liquid inlet (21) and return outlet (22) of the topmost layer have a liquid-passing groove (23) whose vertical distance increases from the left and right sides towards the center of the tool mounting area (14). Each tool hole (11) has two outlets (21) and two return ports (22) on the side wall.

9. The cutting device of the flipping mold mechanism of the thermoforming machine for plastic products as described in claim 6, characterized in that: Each tool mounting hole (11) is equipped with two fluid flow branches (26) on the left and right sides. The tool mounting holes (11) are arranged in a staggered manner in the front and rear rows of the tool mounting area (14) of the lower tool plate (1).

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