A forming apparatus for a cold-resistant sheet packaging box

Abstract

This invention relates to a forming device for cold-resistant and tough sheet packaging boxes, comprising a sheet conveying structure and a thermoforming unit assembly. The sheet conveying structure includes a sheet inlet structure, a middle sheet forming section, and a forming outlet structure. The thermoforming unit assembly is located in the middle sheet forming section. The thermoforming unit assembly includes a forming bottom mold, a bottom mold drive connection structure connected to the bottom of the forming bottom mold, a forming upper pressure mold, and an upper mold drive structure connected to the upper part of the forming upper pressure mold. The sheet conveying structure, combined with a pressure guide structure, provides adaptive pressing and synchronous guiding of the material on both sides, significantly reducing the impact force during the cutting process and effectively suppressing the risk of material warping and deformation. This improves product yield and production line continuity. The thermoforming unit assembly structure allows for easy adjustment of the mold height and the width of the material pressing limit, precisely adapting to the processing needs of thermoformed packaging boxes of different specifications.

Description

Technical Field

[0001] This invention relates to the field of thermoforming equipment, and in particular to a forming equipment for cold-resistant and tough sheet packaging boxes. Background Technology

[0002] Plastic lunch boxes can make people's daily lives more convenient in many situations. They are convenient for people to pack and carry when dining out, and with the advancement of modern technology, the pollution caused by lunch boxes has been greatly reduced, while also providing people with greater convenience.

[0003] Plastic lunch boxes are made of PP cold-resistant and tough sheet material. The PP cold-resistant and tough sheet material is composed of homopolymer / copolymer PP particles and POE cold-resistant toughening agent. Antioxidants and other additives are added according to the actual situation to increase the antioxidant capacity.

[0004] The sheet material retains high toughness, high impact resistance, and does not become brittle at low temperatures, allowing for extrusion, calendering, and thermoforming. It offers excellent low-temperature impact resistance, low density, cost-effectiveness, and good processability. Currently, in the production process using PP cold-resistant and tough sheets in conjunction with general vacuum forming equipment, the lack of connection between the sheet and the equipment leads to significant differences between batches. Summary of the Invention

[0005] The purpose of this invention is to provide a molding device for cold-resistant and tough sheet packaging boxes, solving the problem of using vacuum forming equipment suitable for cold-resistant and tough sheet packaging boxes. This addresses the problems in the prior art.

[0006] The technical solution adopted by this invention to solve its technical problem is: a forming device for cold-resistant and tough sheet packaging boxes, including a sheet conveying structure and a vacuum forming unit assembly. The sheet conveying structure includes a sheet inlet structure, a middle sheet forming section, and a forming outlet structure. The vacuum forming unit assembly is arranged in the middle sheet forming section. The vacuum forming unit assembly includes a bottom mold body, a bottom mold drive connection structure connected to the bottom of the bottom mold body, an upper mold body, and an upper mold drive structure connected to the upper part of the upper mold body. The sheet material entry end structure includes a feeding conveyor table, a feeding edge limiting structure disposed in the feeding conveyor table, and a movable pressing and flattening structure disposed above the feeding edge limiting structure. The molding and discharging end structure includes a discharging conveyor platform located at one end of the vacuum forming unit assembly, a molded material internal limiter located in the discharging conveyor platform, an air-cooling vent assembly located at the inner end of the discharging conveyor platform, and a directional guide wheel assembly located inside the molded material internal limiter. The bottom mold drive connection structure includes a bottom mold linkage component connected to the forming bottom mold body, and a lower drive structure connected to the bottom mold linkage component. The upper mold driving structure includes an upper drive seat structure connected to the upper molding die body, and an upper drive structure disposed in the upper drive seat structure.

[0007] The feeding edge limiting structure includes a limiting seat connected to the inner edge of each feeding conveyor, a top edge limiting guide wheel seat on the upper part of the limiting seat, an inner guide roller group in the conveyor channel between the two limiting seats, and a top material structure inside the feeding conveyor. The top material structure includes a top cylinder group connecting plate inside the feeding conveyor, a top material cylinder group on the upper part of the top cylinder group connecting plate, and a top material plate on the upper part of the top material cylinder group.

[0008] The outer end of the feeding conveyor is connected to the roller feeding telescopic mounting body.

[0009] The aforementioned movable pressing and leveling structure includes external equipment connection seats located on the two outer sides of the feeding conveyor table, and a pressing surface structure for the feeding surface located in the external equipment connection seats.

[0010] The bottom mold drive connection structure includes a bottom mold side end connector assembly connected to the forming bottom mold body, a lower bottom mold connecting seat disposed between the bottom mold side end connector assembly and the forming bottom mold body, a bottom mold connecting drive plate disposed at the lower part of the lower bottom mold connecting seat, and a side end locking assembly disposed on the outside of the bottom mold side end connector assembly.

[0011] The upper mold drive structure includes an upper base body, an upper drive cylinder structure disposed in the upper base body, an upper mold sliding limit rod assembly connected to the upper drive cylinder structure, an upper mold outer auxiliary guide rod assembly disposed on the outside of the upper base body, an upper mold connecting plate structure disposed below the upper mold sliding limit rod assembly, an upper mold locking seat structure disposed in the upper mold sliding limit rod assembly, and an upper mold outer auxiliary guide rod assembly disposed on the outside of the upper base body and connected to the upper mold locking seat structure. The aforementioned upper drive cylinder structure includes an upper drive cylinder assembly housed in the upper machine base, a cylinder connecting frame located outside the upper drive cylinder assembly, and an upper drive inner guide rod assembly located at the output end of the upper drive cylinder assembly. The aforementioned upper mold linkage plate structure includes an upper mold connecting seat located below the upper mold sliding limit rod assembly, an upper mold mating heating plate located below the upper mold connecting seat, and an inner connecting seat located between the two upper mold connecting seats. The aforementioned upper mold locking base structure includes a locking template body and an inner locking base located on the upper part of the locking template body.

[0012] The bottom mold linkage assembly includes a bottom mold connecting seat body connected to the forming bottom mold body, a bottom mold outer limiting seat body located on one side of the bottom mold connecting seat body, and a load-bearing linkage plate body located at the lower part of the bottom mold connecting seat body. The lower drive structure includes a lower drive cylinder linkage platform connected to the supporting linkage plate, a bottom mold pneumatic control main frame located at the lower part of the lower drive cylinder linkage platform, and a bottom mold connecting base located at the lower part of the bottom mold pneumatic control main frame.

[0013] The feeding conveyor table is equipped with a feeding guide device mounting bracket near the feeding end of the vacuum forming unit component. The discharge conveyor is equipped with a discharge guide device mounting bracket near the feeding end of the vacuum forming unit component.

[0014] The beneficial effects of this invention: The sheet conveying structure designed in this invention, combined with the pressure-guiding structure for adaptive pressing and synchronous guiding of the material on both sides, significantly reduces the impact force during the cutting process and effectively suppresses the risk of material warping and deformation. This greatly improves product yield and production line continuity.

[0015] The thermoforming unit component structure of this invention enables adjustment of the mold height and the width of the material clamping limit, allowing the equipment to accurately adapt to the processing needs of thermoformed packaging boxes of different specifications.

[0016] The present invention provides a displacement adjustment structure for the mold; the unfolded vacuum forming mold structure transmits lateral displacement, realizing the function of adjusting the distance between the upper and lower molds. The mold operates precisely, ensuring mechanical stability under high-speed operation, and can quickly adapt to materials of different specifications, significantly expanding the processing range of the equipment.

[0017] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 for Figure 1 A schematic diagram of the vacuum forming unit component.

[0020] Figure 3 for Figure 2 A schematic diagram of the upper drive cylinder structure.

[0021] Figure 4 for Figure 2 A schematic diagram of the structure of the bottom mold linkage component.

[0022] Figure 5 for Figure 2 A schematic diagram of the lower drive structure in the diagram.

[0023] Figure 6 for Figure 2 A schematic diagram of the feed edge limiting structure.

[0024] Figure 7 for Figure 6 A schematic diagram of the improved feed edge limiting structure.

[0025] Figure 8 This is a schematic diagram illustrating the construction of another embodiment of the present invention.

[0026] Figure 9 for Figure 8 A schematic diagram of the internal connection structure.

[0027] In the diagram: 1. Molding bottom mold body, 2. Molding upper pressure mold body, 3. Upper machine base body, 4. Upper mold sliding limit rod assembly, 5. Upper mold outer auxiliary guide rod assembly, 6. Upper drive cylinder body assembly, 7. Cylinder body connecting frame, 8. Upper drive inner guide rod assembly, 9. Upper mold connecting seat, 10. Upper mold mating hot plate, 11. Inner seat body, 12. Locking plate body, 13. Inner locking mold seat, 14. Locking device, 15. 16. 17. 18. 19. 20. Lower bottom mold connecting seat, 21. Bottom mold connecting drive plate, 22. Side mold locking assembly, 23. Support column assembly, 24. Feeding guide equipment mounting side seat, 25. Discharge guide. 26. Feeding conveyor table, 27. Limiting seat, 28. Top edge limiting guide wheel seat, 29. Inner guide roller assembly in the conveyor channel, 30. Top cylinder assembly connecting plate, 31. Ejecting cylinder assembly, 32. Ejecting plate, 33. Discharge conveyor table, 34. Built-in limiting of the forming material, 35. Air cooling port assembly, 36. Directional guide wheel assembly, 37. Roller body feeding telescopic mounting body, 38. External equipment connecting seat, 39. Feeding pressing shaft assembly, 40. Middle sheet forming section, 41. Adjustment connecting seat, 42. Adjustment track, 43. Servo displacement drive seat, 44. Servo electric, 45. Mold locking linkage docking seat. Detailed Implementation

[0028] The terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end" used in the application text to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1, as Figure 1-7 As shown, a forming device for cold-resistant and tough sheet packaging boxes includes a sheet conveying structure and a vacuum forming unit assembly. The sheet conveying structure includes a sheet inlet structure, a middle sheet forming section 40, and a forming outlet structure. The vacuum forming unit assembly is disposed in the middle sheet forming section. The vacuum forming unit assembly includes a bottom mold body 1, a bottom mold drive connection structure connected to the bottom of the bottom mold body, an upper mold body 2, and an upper mold drive structure connected to the upper part of the upper mold body. The bottom mold drive connection structure includes a bottom mold linkage component connected to the forming bottom mold body, and a lower drive structure connected to the bottom mold linkage component. The upper mold driving structure includes an upper drive seat structure connected to the upper molding die body, and an upper drive structure disposed in the upper drive seat structure.

[0030] The upper mold drive structure includes an upper base body 3, an upper drive cylinder structure disposed in the upper base body, an upper mold sliding limit rod assembly 4 connected to the upper drive cylinder structure, an upper mold outer auxiliary guide rod assembly 5 disposed on the outer side of the upper base body, an upper mold connecting plate structure disposed below the upper mold sliding limit rod assembly, and an upper mold locking seat structure disposed in the upper mold sliding limit rod assembly. The upper drive cylinder structure includes an upper drive cylinder assembly 6 located in the upper base 3, a cylinder connecting frame 7 located outside the upper drive cylinder assembly, and an upper drive inner guide rod assembly 8 located at the output end of the upper drive cylinder assembly. The aforementioned upper mold linkage plate structure includes an upper mold connecting seat 9 located below the upper mold sliding limit rod assembly, an upper mold mating heating plate 10 located below the upper mold connecting seat, and an inner connecting seat 11 located between the two upper mold connecting seats. The upper mold locking base structure includes a locking template body 12, an inner locking base 13 located on the upper part of the locking template body, and a locking device 14 located between the locking template body 12 and the inner locking base 13.

[0031] The bottom mold drive connection structure includes a bottom mold side end connector assembly connected to the forming bottom mold body 2, a lower bottom mold connecting seat 20 disposed between the bottom mold side end connector assembly and the forming bottom mold body, a bottom mold connecting drive plate 21 disposed at the lower part of the lower bottom mold connecting seat, and a side end locking mold assembly 22 disposed on the outside of the bottom mold side end connector assembly.

[0032] The bottom mold linkage assembly includes a bottom mold connecting seat 18 connected to the forming bottom mold body, a bottom mold outer limiting seat 19 located on one side of the bottom mold connecting seat, and a load-bearing linkage plate 41 located at the lower part of the bottom mold connecting seat. The lower drive structure includes a lower drive cylinder linkage platform 17 connected to the load-bearing linkage plate, a bottom mold pneumatic control main frame 16 located at the lower part of the lower drive cylinder linkage platform, a bottom mold connecting base 15 located at the lower part of the bottom mold pneumatic control main frame, and a support column group 23 located between the lower drive cylinder linkage platform 17 and the bottom mold connecting base 15.

[0033] The feeding conveyor is equipped with a feeding guide device mounting bracket 24 near the feeding end of the vacuum forming unit component. The discharge conveyor is provided with a discharge guide device mounting seat 25 near the feeding end of the vacuum forming unit component.

[0034] The sheet material entry end structure includes a feeding conveyor 26, a feeding edge limiting structure disposed in the feeding conveyor 26, and a movable pressing and flattening structure disposed on the upper part of the feeding edge limiting structure. The feeding edge limiting structure includes a limiting seat 27 connected to the inner edge of each feeding conveyor, a top edge limiting guide wheel seat 28 located on the upper part of the limiting seat, an inner guide roller group 29 located between two limiting seats, and a top material structure located inside the feeding conveyor. The top material structure includes a top cylinder group connecting plate 30 located inside the feeding conveyor, a top material cylinder group 31 located on the upper part of the top cylinder group connecting plate, and a top material plate 32 located on the upper part of the top material cylinder group. The outer end of the feeding conveyor is connected to a roller feeding telescopic mounting body 37.

[0035] The molding and discharging end structure includes a discharging conveyor 33 located at one end of the vacuum forming unit assembly, a molding material internal limiter 34 located in the discharging conveyor, an air cooling vent assembly 35 located at the inner end of the discharging conveyor, and a directional guide wheel assembly 36 located inside the molding material internal limiter. The active pressing and leveling structure includes two external equipment connection seats 38 located on the outer sides of the feeding conveyor table, and a feeding pressing surface shaft assembly 39 located in the external equipment connection seats.

[0036] The sheet conveying structure of this invention, combined with a pressure-guiding structure for adaptive pressing and synchronous guiding of the material on both sides, significantly reduces the impact force during the cutting process and effectively suppresses the risk of material warping and deformation. This greatly improves product yield and production line continuity.

[0037] The present invention features a dual adjustable mechanism that combines the lifting of the support structure of the blister forming unit component and the linkage adjustment of the guide roller spacing. This mechanism adjusts the height of the mold and the width of the material pressing limit, enabling the equipment to precisely adapt to the processing needs of blister packaging boxes of different specifications.

[0038] Example 2, as follows Figure 8 , 9 As shown, a servo displacement adjustment structure is provided at the bottom of the bottom mold connecting base 15 at the bottom of the vacuum forming unit assembly. The servo displacement adjustment structure includes an adjustment connecting seat 41 connected to the bottom mold connecting base 15, an adjustment track 42 located at the lower part of the adjustment connecting seat 41, a servo displacement drive seat 43 located between the adjustment track 42 and the adjustment connecting seat 41, a servo motor 44 located at one end of the upper part of the servo displacement drive seat 43, and a mold locking linkage docking seat 45 located at the other end of the upper part of the servo displacement drive seat 43 and connected to the adjustment connecting seat 41.

[0039] The present invention provides a displacement adjustment structure for the mold; the unfolded vacuum forming mold structure transmits lateral displacement, realizing the function of adjusting the distance between the upper and lower molds. The mold operates precisely, ensuring mechanical stability under high-speed operation, and can quickly adapt to materials of different specifications, significantly expanding the processing range of the equipment.

[0040] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0041] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

[0042] All parts not covered in this invention are the same as or can be implemented using existing technologies.

Claims

1. A molding device for cold-resistant and tough sheet packaging boxes, characterized in that: The system includes a sheet conveying structure and a vacuum forming unit assembly. The sheet conveying structure comprises a sheet inlet structure, a middle sheet forming section, and a forming outlet structure. The vacuum forming unit assembly is located in the middle sheet forming section. The vacuum forming unit assembly includes a bottom mold body, a bottom mold drive connection structure connected to the bottom of the bottom mold body, an upper mold body, and an upper mold drive structure connected to the upper part of the upper mold body. The sheet material entry end structure includes a feeding conveyor table, a feeding edge limiting structure disposed in the feeding conveyor table, and a movable pressing and flattening structure disposed above the feeding edge limiting structure. The molding and discharging end structure includes a discharging conveyor platform located at one end of the vacuum forming unit assembly, a molded material internal limiter located in the discharging conveyor platform, an air-cooling vent assembly located at the inner end of the discharging conveyor platform, and a directional guide wheel assembly located inside the molded material internal limiter. The bottom mold drive connection structure includes a bottom mold linkage component connected to the forming bottom mold body, and a lower drive structure connected to the bottom mold linkage component. The upper mold driving structure includes an upper drive seat structure connected to the upper molding die body, and an upper drive structure disposed in the upper drive seat structure.

2. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The feeding edge limiting structure includes a limiting seat connected to the inner edge of each feeding conveyor, a top edge limiting guide wheel seat on the upper part of the limiting seat, an inner guide roller group in the conveyor channel between the two limiting seats, and a top material structure inside the feeding conveyor. The top material structure includes a top cylinder group connecting plate inside the feeding conveyor, a top material cylinder group on the upper part of the top cylinder group connecting plate, and a top material plate on the upper part of the top material cylinder group.

3. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The outer end of the feeding conveyor is connected to the roller feeding telescopic mounting body.

4. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The aforementioned active pressing and leveling structure includes external equipment connection seats located on the two outer sides of the feeding conveyor table, and a pressing surface structure for the feeding surface located in the external equipment connection seats.

5. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The bottom mold drive connection structure includes a bottom mold side end connector assembly connected to the forming bottom mold body, a lower bottom mold connecting seat disposed between the bottom mold side end connector assembly and the forming bottom mold body, a bottom mold connecting drive plate disposed at the lower part of the lower bottom mold connecting seat, and a side end locking assembly disposed on the outside of the bottom mold side end connector assembly.

6. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The upper mold drive structure includes an upper base body, an upper drive cylinder structure disposed in the upper base body, an upper mold sliding limit rod assembly connected to the upper drive cylinder structure, an upper mold outer auxiliary guide rod assembly disposed on the outside of the upper base body, an upper mold connecting plate structure disposed below the upper mold sliding limit rod assembly, an upper mold locking seat structure disposed in the upper mold sliding limit rod assembly, and an upper mold outer auxiliary guide rod assembly disposed on the outside of the upper base body and connected to the upper mold locking seat structure. The aforementioned upper drive cylinder structure includes an upper drive cylinder assembly housed in the upper machine base, a cylinder connecting frame located outside the upper drive cylinder assembly, and an upper drive inner guide rod assembly located at the output end of the upper drive cylinder assembly. The aforementioned upper mold linkage plate structure includes an upper mold connecting seat located below the upper mold sliding limit rod assembly, an upper mold mating heating plate located below the upper mold connecting seat, and an inner connecting seat located between the two upper mold connecting seats. The aforementioned upper mold locking base structure includes a locking template body and an inner locking base located on the upper part of the locking template body.

7. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The bottom mold linkage assembly includes a bottom mold connecting seat body connected to the forming bottom mold body, a bottom mold outer limiting seat body located on one side of the bottom mold connecting seat body, and a load-bearing linkage plate body located at the lower part of the bottom mold connecting seat body. The lower drive structure includes a lower drive cylinder linkage platform connected to the supporting linkage plate, a bottom mold pneumatic control main frame located at the lower part of the lower drive cylinder linkage platform, and a bottom mold connecting base located at the lower part of the bottom mold pneumatic control main frame.

8. The molding equipment for cold-resistant and tough sheet packaging boxes as described in claim 1, characterized in that: The feeding conveyor table is equipped with a feeding guide device mounting bracket near the feeding end of the vacuum forming unit component. The discharge conveyor is equipped with a discharge guide device mounting bracket near the feeding end of the vacuum forming unit component.

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