A plastic lunch box forming and manufacturing device

Abstract

The utility model belongs to the field of plastic lunch box manufacturing, concretely be a kind of plastic lunch box's forming manufacturing equipment, the upper slide of square hole is provided with sliding frame, the lower end surface of sliding frame is provided with multiple female die, the inside slide of square hole is provided with first sliding plate, the upper end surface of first sliding plate is provided with multiple male die, each male die is slid with its above female die, the lower end surface of workbench is provided with second support frame below first sliding plate, the upper end surface of second support frame is provided with multiple heating wires below each male die, the upper end surface of sliding frame is provided with fan, the output of fan and the internal space of sliding frame are interconnected, the outside of multiple female die is provided with multiple exhaust holes on the inner side wall of sliding frame.The utility model is provided through the setting of fan and other components, can be before extruding plastic sheet and shaping, through the up-down movement of male die, preheating is carried out to male die, so that plastic sheet is extruded and shaped, and the thickness is more uniform.

Description

Technical Field

[0001] This utility model belongs to the field of plastic lunch box manufacturing technology, and in particular relates to a molding and manufacturing equipment for plastic lunch boxes. Background Technology

[0002] Pressure molding is a method for manufacturing plastic lunch boxes. The plastic sheet is heated and softened, and then the softened plastic sheet is fed into the mold in sections in a stepping manner. The upper and lower molds are used to press the plastic sheet into the shape of the lunch box. After cooling, solidification and cutting, the finished plastic lunch box is finally obtained.

[0003] Patent application number CN202311611784.7 discloses a plastic lunch box molding and manufacturing equipment, wherein the outer side of the traction cylinder is evenly provided with fitting holes, the inner wall of the traction cylinder is evenly provided with air collection boxes, the outer side of the air collection boxes is evenly provided with air suction holes, the outer side of the conveyor belt is evenly provided with fitting holes, the top of the air suction box is evenly provided with adsorption holes, and the output end of the conversion air pump is connected to the middle of one side of the adjacent air suction box with a main air pipe.

[0004] Existing technologies use clips to control the thickness of plastic sheets, but there are still shortcomings:

[0005] First, existing plastic lunch box molding equipment lacks preheating of the mold when pressing plastic sheets, which causes the temperature of the plastic sheet to drop after contacting the mold during pressing, reducing the overall extensibility and resulting in uneven thickness of the produced plastic lunch boxes.

[0006] Secondly, existing plastic lunchbox molding equipment is prone to getting stuck inside the cutting components during the cutting process. Also, the lunchbox is relatively thin, and the traditional ejection structure can easily cause dents in the lunchbox, resulting in low overall production quality. Utility Model Content

[0007] To overcome the shortcomings of existing technologies, this invention provides a molding and manufacturing device for plastic lunch boxes. By incorporating components such as a fan, this invention preheats the die by moving it up and down before extruding and shaping the plastic sheet, resulting in a more uniform thickness during the extrusion and shaping process.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a molding and manufacturing equipment for plastic lunch boxes, comprising a workbench, a square hole on the upper surface of the workbench, a sliding frame slidably disposed above the square hole, a plurality of concave molds on the lower surface of the sliding frame, a first sliding plate slidably disposed inside the square hole, a plurality of convex molds on the upper surface of the first sliding plate, each convex mold sliding relative to the concave mold above it, a second support frame disposed below the first sliding plate on the lower surface of the workbench, a plurality of heating wires disposed below each convex mold on the upper surface of the second support frame, a fan disposed on the upper surface of the sliding frame, the output end of the fan communicating with the internal space of the sliding frame, a plurality of exhaust holes disposed on the outer side of the plurality of concave molds on the inner sidewall of the sliding frame, and a cutting component disposed on one side of the square hole on the upper surface of the workbench.

[0009] Optionally, the cutting assembly includes a second sliding plate slidably disposed above the worktable. The lower end surface of the second sliding plate is provided with a plurality of cutting frames. Each cutting frame is provided with a feeding hole below the upper end surface of the worktable, and each cutting frame is provided with a cutting blade at its lower edge.

[0010] Optionally, a first support frame is provided on the upper end surface of the second sliding plate, and a third support frame is provided above the first support frame on the upper end surface of the workbench. A folding airbag is provided between the first support frame and the second sliding plate. An air supply pipe is provided between each cutting frame and the folding airbag. A third sliding plate is fixedly provided on the upper end surface of the folding airbag, and the third sliding plate is slidably connected to the first support frame.

[0011] Optionally, the folding airbag is provided with a plurality of support rods connected between the first support frame and the second sliding plate. Each support rod is slidably connected to the third sliding plate. A first spring is provided between the second and third sliding plates on the outside of each support rod. A plurality of limiting strips are provided on the outer side wall of each cutting frame. A first push cylinder is provided on the upper end face of the third support frame. The output end of the first push cylinder passes through the third support frame and is fixedly connected to the upper end face of the third sliding plate.

[0012] Optionally, each of the cutting frames is provided with an inflation chamber inside, each inflation chamber is connected to its adjacent air supply pipe, each inflation chamber has a conical protrusion on its inner bottom surface, and each conical protrusion has a plurality of air vents uniformly arranged in a ring on the outer side of the inner bottom surface of the inflation chamber.

[0013] Optionally, multiple first sliding rods are slidably arranged on both sides of the first support frame, and the multiple first sliding rods are slidably connected to the second sliding plate. Each first sliding rod has a limit block at its upper end above the second sliding plate, a pressing block at its lower end, and a second spring between the pressing block and the second sliding plate on the outside of each first sliding rod.

[0014] Optionally, a plurality of push switches are provided on the upper end surface of the second support frame between the first sliding plate and the second support frame.

[0015] In summary, compared with existing technologies, the beneficial effects of this solution are as follows:

[0016] (1) By setting up components such as a fan, an exhaust hole and a heating wire, this utility model can preheat the punch by moving the punch up and down before extruding and shaping the plastic sheet. This allows the plastic sheet to be extruded and stretched more evenly when the punch and die extrude and shape the plastic sheet, thereby effectively improving the overall production quality of the plastic lunch box.

[0017] (2) By setting up components such as folding airbags, inflation chambers and conical protrusions, this utility model enables the equipment to cool the lunch box a second time when cutting and unloading the formed lunch box, and also blow the lunch box out from inside the cutting frame, thereby effectively preventing the lunch box from deforming during cutting and unloading.

[0018] (3) By setting up components such as the first sliding rod, the second spring, and rollers, this utility model enables the plastic sheet connected to the lunch box to be pressed down and fixed when cutting the lunch box after it has been formed, thereby making the cutting of the lunch box more stable. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 for Figure 3 A three-dimensional cross-sectional view at point AA;

[0023] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0024] Figure 6 for Figure 4 A magnified view of a section at point C.

[0025] Figure 7 for Figure 4 Enlarged view of a section at point D;

[0026] Figure 8 for Figure 1 A magnified view of a section at point E in the middle.

[0027] In the diagram: workbench 10, square hole 11, first sliding plate 12, punch 13, sliding frame 14, die 15, second sliding plate 16, cutting frame 17, material discharge hole 18, cutting blade 19, first support frame 20, folding airbag 21, air supply pipe 22, support rod 23, first spring 24, third sliding plate 25, limit strip 26, inflation chamber 27, conical protrusion 28, vent hole 29, first sliding rod 30, sliding clip 31, limit block 32, pressing block 33, second spring 34, roller 35, fan 36, exhaust hole 37, second support frame 38, heating wire 39, guide roller 40, winding roller 41, push switch 42, third support frame 43, first push cylinder 44. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Example 1:

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a molding and manufacturing equipment for plastic lunch boxes includes a worktable 10. Heated plastic sheets move horizontally across the upper surface of the worktable 10. A winding roller 41 is rotatably mounted at one end of the worktable 10. A motor is mounted on one side of the winding roller 41 to provide power for its rotation. The output of the motor drives the winding roller 41 to rotate, thereby winding the plastic sheet. A square hole 11 is provided on the upper surface of the worktable 10. A sliding frame 14 is slidably mounted above the square hole 11. Multiple concave molds 15 are provided on the lower surface of the sliding frame 14. A first sliding plate 12 is slidably mounted inside the square hole 11. Multiple convex molds 13 are provided on the upper surface of the first sliding plate 12. Each convex mold 13 and its upper concave mold 15 form a winding mechanism for the plastic sheet on the upper surface of the worktable 10. The sheet is extruded and shaped. A second support frame 38 is provided below the first sliding plate 12 on the lower end face of the worktable 10. A third push cylinder is provided on the lower end face of the second support frame 38. The output end of the third push cylinder passes through the second support frame 38 and is fixedly connected to the lower end face of the first sliding plate 12. Multiple heating wires 39 are provided below the second support frame 38 on the upper end face of each punch 13. A heater is provided below the second support frame 38 on the lower end face of each punch 13. One end of each heating wire 39 is connected to the output end of the heater below it. The heater heats the heating wires 39 through its output end. When the first sliding plate 12 drives the multiple punches 13 to move vertically downward to approach the multiple heating wires 39, the multiple heating wires 39 heat the punches 13.

[0031] Furthermore, such as Figure 4 As shown, a fan 36 is provided on the upper surface of the sliding frame 14. The output end of the fan 36 is connected to the internal space of the sliding frame 14. Multiple exhaust holes 37 are provided on the inner sidewalls of the sliding frame 14 for each of the multiple dies 15. The fan 36 is a common blower, which is existing technology. The fan 36 blows air into the sliding frame 14 through its output end. The air entering the sliding frame 14 flows out through the multiple exhaust holes 37, forming air circulation inside the sliding frame 14, thereby cooling the multiple dies 15. A fourth support frame is provided on the upper surface of the worktable 10 above the sliding frame 14. A fifth support frame is provided above the upper end face of the sliding frame 14 above the 36. A second push cylinder is provided on the upper end face of the fourth support frame. The output end of the second push cylinder passes through the fourth support frame and is fixedly connected to the upper end face of the fifth support frame. The second and third push cylinders are both ordinary electric push cylinders, which is existing technology. The output end of the second push cylinder drives the sliding frame 14 to move vertically downward, and the output end of the third push cylinder drives the first sliding plate 12 to move vertically upward, so that each punch 13 moves upward into the cavity 15 above it, thereby forming a compression deformation of the plastic sheet on the upper end face of the worktable 10, and thus forming the initial shape of the plastic lunch box.

[0032] Furthermore, such as Figure 1 and Figure 4As shown, a plurality of push switches 42 are provided on the upper end surface of the second support frame 38 between the first sliding plate 12 and the second support frame 38. The plurality of push switches 42 are electrically connected to the fan 36 and the plurality of heaters. When the first sliding plate 12 moves down to press the pressing ends of the plurality of push switches 42, the plurality of push switches 42 control the heaters to heat the plurality of heating wires 39, thereby heating the plurality of punches 13, and thus preheating the lunch box during molding. When the first sliding plate 12 is released from pressing the pressing ends of the plurality of push switches 42, the plurality of push switches 42 control the fan 36 to cool the plurality of concave molds 15, thereby shaping the plastic lunch box during molding.

[0033] A guide roller 40 is rotatably mounted on one side of the square hole 11 on the side wall of the worktable 10. The guide roller 40 provides support and guidance for the plastic sheet that moves to the upper surface of the worktable 10.

[0034] Furthermore, such as Figure 2 and Figure 4 As shown, a cutting assembly is provided on one side of the square hole 11 on the upper surface of the workbench 10. The cutting assembly includes a second sliding plate 16 slidably disposed above the workbench 10. Multiple cutting frames 17 are provided on the lower surface of the second sliding plate 16. Each cutting frame 17 has a feeding hole 18 below it on the upper surface of the workbench 10. Each cutting frame 17 has a cutting blade 19 on its lower edge. When the formed plastic lunch box moves horizontally above the multiple feeding holes 18, the downward movement of the second sliding plate 16 causes the multiple cutting frames 17 to move downward, thereby causing the multiple cutting blades 19 to cut against the upper edge of the feeding hole 18, thus cutting and separating the multiple formed lunch boxes from the plastic sheet. The separated plastic lunch boxes fall through the multiple feeding holes 18, completing the feeding process.

[0035] Furthermore, such as Figure 4 and Figure 8 As shown, a first support frame 20 is provided on the upper surface of the second sliding plate 16. A third support frame 43 is provided above the first support frame 20 on the upper surface of the workbench 10. A folded airbag 21 is provided between the first support frame 20 and the second sliding plate 16. Each cutting frame 17 is connected to the folded airbag 21 by an air supply pipe 22. A third sliding plate 25 is fixedly provided on the upper surface of the folded airbag 21. The third sliding plate 25 is slidably connected to the first support frame 20. When cutting the plastic lunch box, the plastic lunch box will get stuck inside the cutting frame 17. At this time, the third sliding plate 25 is controlled to move vertically downward. The third sliding plate 25 compresses the folded airbag 21, which causes the air inside the folded airbag 21 to be blown into the interior of each cutting frame 17 through multiple air supply pipes 22. The air inside the cutting frame 17 increases and the pressure increases, causing the plastic lunch box stuck inside the cutting frame 17 to detach from the cutting frame 17. At the same time, the plastic lunch box can also be further cooled.

[0036] Furthermore, such as Figure 4 , Figure 6 and Figure 8 As shown, multiple support rods 23 are connected to the outside of the folding airbag 21 between the first support frame 20 and the second sliding plate 16. Each support rod 23 is slidably connected to the third sliding plate 25. A first spring 24 is provided on the outside of each support rod 23 between the second sliding plate 16 and the third sliding plate 25. Multiple limiting strips 26 are provided on the outer side wall of each cutting frame 17. A first push cylinder 44 is provided on the upper end face of the third support frame 43. The output end of the first push cylinder 44 passes through the third support frame 43 and is fixedly connected to the upper end face of the third sliding plate 25. The first push cylinder 44 is a common electric push cylinder, which is existing technology. The output end of the first push cylinder 44 drives the third sliding plate 25 to move vertically. The third sliding plate 25 is located between the first support frame 20 and the first support frame 20. Under the elastic support of multiple first springs 24, the first support frame 20 and the cutting frame 17 and other components move vertically. Under the elastic action of multiple first springs 24, the cutting frame 17 and the cutting blade 19 first cut the plastic lunch box until multiple limit strips 26 contact the upper surface of the worktable 10, forming a sliding limit on the multiple cutting frames 17 inside the feeding hole 18. At this time, the output end of the first push cylinder 44 continues to extend, which will drive the third sliding plate 25 to compress the multiple first springs 24, so that the third sliding plate 25 compresses the folding airbag 21, and then the air inside the folding airbag 21 is blown into the interior of the multiple cutting frames 17 through multiple air pipes 22, forming the feeding of the plastic lunch box inside the cutting frame 17.

[0037] Furthermore, such as Figure 4 and Figure 5 As shown, each cutting frame 17 has an inflation chamber 27 inside, and each inflation chamber 27 is connected to its adjacent air supply pipe 22. Each inflation chamber 27 has a conical protrusion 28 on its inner bottom surface. Each conical protrusion 28 has multiple air vents 29 evenly arranged in a ring on the outer side of the inner bottom surface of the inflation chamber 27. After the folded airbag 21 is compressed, the air is blown into the inflation chamber 27 through the multiple air supply pipes 22, and then diverted through the conical protrusion 28, so that the air entering the inflation chamber 27 moves evenly to the outer side of the conical protrusion 28, and is then blown to the upper surface of the plastic lunch box inside the cutting frame 17 through the multiple air vents 29. Since the air vents 29 are evenly arranged in a ring, the air blown out by the multiple air vents 29 forms a uniform cooling and feeding effect on the upper surface of the plastic lunch box.

[0038] Example 2:

[0039] Based on Example 1, further examples are made, such as... Figure 4 and Figure 7As shown, multiple first sliding rods 30 are slidably arranged on both sides of the first support frame 20. Each first sliding rod 30 is slidably connected to the second sliding plate 16. A limit block 32 is provided at the upper end of each first sliding rod 30 above the second sliding plate 16, limiting the sliding of the sliding clip 31. A pressing block 33 is provided at the lower end of each first sliding rod 30. The pressing block 33 is made of anti-slip material. The outer surface of each first sliding rod 30 is connected to the pressing block 33 and the second sliding plate 16. A second spring 34 is provided between the two sliding plates 16. The elastic tension of the multiple second springs 34 is much smaller than the sum of the elastic tension of the multiple first springs 24. Under the action of the elastic tension of the multiple second springs 34, when the components such as the second sliding plate 16 and the cutting frame 17 move vertically downward to cut the plastic lunch box, the multiple pressing blocks 33 will first contact the upper end surface of the plastic sheet to press down and fix the plastic sheet, preventing it from deforming during cutting and affecting the production quality of the lunch box.

[0040] It should be noted that this application provides a buffer damping structure at the connection between the first spring 24 and the second spring 34 to ensure that the two springs will not vibrate excessively when the pressure is removed, and to ensure the stability during pressing and feeding. Considering that this is prior art, this application will not provide too many graphic drawings or textual descriptions.

[0041] Finally, it should be noted that the plastic lunch box molding and manufacturing equipment of this utility model needs to protect the various mechanical structures and related motion logic in this solution. Therefore, it does not elaborate on the various sensors, detectors and driving components required for the actual operation of the various mechanical structures. However, for those skilled in the art, various control systems and electrical connection methods, including various electrical components and driving components, can be completed using conventional technical means. As long as the beneficial effects or the specific actions during the above work can be achieved, they can be implemented. This solution does not impose too many restrictions.

[0042] Furthermore, the push cylinder, press switch, heating wire, fan, and heater in the molding and manufacturing equipment for plastic lunch boxes in this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0043] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0044] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A molding and manufacturing equipment for plastic lunch boxes, comprising a workbench (10), wherein the upper surface of the workbench (10) is provided with a square hole (11), characterized in that, A sliding frame (14) is slidably disposed above the square hole (11). Multiple concave molds (15) are disposed on the lower end face of the sliding frame (14). A first sliding plate (12) is slidably disposed inside the square hole (11). Multiple convex molds (13) are disposed on the upper end face of the first sliding plate (12). Each convex mold (13) slides relative to the concave mold (15) above it. A second support frame (38) is disposed below the first sliding plate (12) on the lower end face of the worktable (10). Each of the punches (13) is provided with multiple heating wires (39) on the upper surface of the second support frame (38). A fan (36) is provided on the upper surface of the sliding frame (14). The output end of the fan (36) is connected to the internal space of the sliding frame (14). Multiple exhaust holes (37) are provided on the inner sidewall of the sliding frame (14) on the outside of the multiple dies (15). A cutting component is provided on one side of the square hole (11) on the upper surface of the worktable (10).

2. The molding and manufacturing equipment for a plastic lunch box according to claim 1, characterized in that, The cutting assembly includes a second sliding plate (16) slidably disposed above the worktable (10). The lower end surface of the second sliding plate (16) is provided with a plurality of cutting frames (17). Each cutting frame (17) is provided with a feeding hole (18) below the upper end surface of the worktable (10). Each cutting frame (17) is provided with a cutting blade (19) at its lower edge.

3. The molding and manufacturing equipment for a plastic lunch box according to claim 2, characterized in that, A first support frame (20) is provided on the upper end surface of the second sliding plate (16). A third support frame (43) is provided above the first support frame (20) on the upper end surface of the workbench (10). A folded airbag (21) is provided between the first support frame (20) and the second sliding plate (16). An air supply pipe (22) is provided between each cutting frame (17) and the folded airbag (21). A third sliding plate (25) is fixedly provided on the upper end surface of the folded airbag (21). The third sliding plate (25) is slidably connected to the first support frame (20).

4. The molding and manufacturing equipment for a plastic lunch box according to claim 3, characterized in that, The folding airbag (21) is provided with a plurality of support rods (23) connected between the first support frame (20) and the second sliding plate (16). Each support rod (23) is slidably connected to the third sliding plate (25). A first spring (24) is provided between the second sliding plate (16) and the third sliding plate (25) on the outside of each support rod (23). A plurality of limiting strips (26) are provided on the outer side wall of each cutting frame (17). A first push cylinder (44) is provided on the upper end face of the third support frame (43). The output end of the first push cylinder (44) passes through the third support frame (43) and is fixedly connected to the upper end face of the third sliding plate (25).

5. The molding and manufacturing equipment for a plastic lunch box according to claim 4, characterized in that, Each of the cutting frames (17) is provided with an inflation chamber (27) inside. Each inflation chamber (27) is connected to its adjacent air supply pipe (22). Each inflation chamber (27) has a conical protrusion (28) on its inner bottom surface. Each conical protrusion (28) has a plurality of air vents (29) uniformly arranged in a ring on the outer side of the inner bottom surface of the inflation chamber (27).

6. The molding and manufacturing equipment for a plastic lunch box according to claim 4, characterized in that, Multiple first sliding rods (30) are slidably arranged on both sides of the first support frame (20). The multiple first sliding rods (30) are slidably connected to the second sliding plate (16). A limit block (32) is provided at the upper end of each first sliding rod (30) above the second sliding plate (16). A pressing block (33) is provided at the lower end of each first sliding rod (30). A second spring (34) is provided on the outside of each first sliding rod (30) between the pressing block (33) and the second sliding plate (16).

7. The molding and manufacturing equipment for a plastic lunch box according to claim 1, characterized in that, A plurality of push-button switches (42) are provided on the upper end face of the second support frame (38) between the first sliding plate (12) and the second support frame (38).

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