Edge roll forming machine for polygonal double-layer containers and polygonal double-layer containers produced thereby

Abstract

The invention provides a polygonal double-layer container edge roll forming machine and a polygonal double-layer container made by the machine, comprising: a machine table, a top base and a bottom base connected to the front end of the machine table, and a rotating mechanism arranged on the top base, the rotating mechanism comprising a rotating power source, a rotating disc, and a male mold; at least two edge roll mechanisms arranged on the periphery of the rotating mechanism, the edge roll mechanism comprising a linkage seat, an edge roller, and a spring seat; a lifting mechanism arranged on the bottom base, the lifting mechanism comprising a lifting power source, a lifting rod, and a lifting support platform, the lifting support platform being provided with a rotating carrier connected to a female mold, the polygonal double-layer container placed in the female mold is pushed upward by the lifting mechanism to form a clamping between the male mold and the female mold, and then the upper edge of the polygonal double-layer container is rolled and fixed by the linkage of the rotating mechanism and the edge roll mechanism.

Description

Technical Field

[0001] This invention mainly relates to an edge rolling forming machine used to combine paper containers and plastic containers into a polygonal double-layer container, and particularly to a mechanism that uses rotation to fix the edges of two containers together. Background Technology

[0002] As the food delivery and takeout market continues to expand, paper-based tableware plays a crucial role in the catering industry's entry into the delivery battle. Choosing the right food containers can not only make the food look more delicious and of higher quality, but also leave a good first impression on consumers.

[0003] Polypropylene is a common plastic in daily life, with excellent acid and alkali resistance, high temperature resistance, and toughness. It can withstand temperatures up to 110℃ and is often used in food containers or product packaging. It is the most suitable material for making plastic containers. Disposable tableware made from polypropylene is both impact-resistant and oil-resistant, microwaveable, and not easily deformed. It is also suitable for holding hot food and oily dishes. It is currently the most commonly used material. Of course, other materials also have their own advantages and are used in different products. For example, polyethylene terephthalate (PET), also known as No. 1 plastic, makes transparent food containers that can withstand temperatures up to 60℃. Due to its good toughness, airtightness, and non-volatile properties, it is also suitable for food containers. Polystyrene is also a common food container material. It is lightweight, has high hardness, and can withstand temperatures up to 70℃. Food containers made of polystyrene are hard and stable and are not easily deformed by food. However, due to its lower heat resistance, special care should be taken when choosing food to place in them. Paper lunch boxes are lightweight and suitable for various foods, with a simple and attractive design. They can withstand temperatures up to 95℃. Currently, in Taiwan, paper containers are waterproofed by having a coating layer on the inner layer. This coating makes the surface more effective at preventing water and oil damage, extending the shelf life of the container. However, many coated materials cannot be microwaved, as high-temperature heating may cause the coating layer to dissolve and contaminate the food. Furthermore, recycling coated paper requires sending it to a professional waste paper processing plant to separate the coating from the paper. This process alone requires considerable energy and equipment to recycle the paper into paper products.

[0004] As can be seen from the aforementioned conventional products, currently commercially available polygonal lunch boxes are all single-layered and made of plastic or paper with a coated layer. Although some single-layered materials can be microwaved, the lunch boxes are very hot after microwaving, requiring them to be wrapped in a bag or paper for easy handling by consumers, which is quite inconvenient. The inventor has filed patent applications in Taiwan No. 113121092 and No. 113133547. These patents mainly focus on improving the design of round composite material containers, particularly the edge-rolling forming method of round composite material containers, addressing the shortcomings of round containers in holding hot liquids and in recycling operations. Since most food on the market is packaged in single-layered square or rectangular containers, these shortcomings need to be improved. Summary of the Invention

[0005] Given that polygonal double-layer containers are all single-layered, the purpose of this invention is to provide a polygonal double-layer container edge-rolling forming machine and the container thereof. This invention allows for the rapid edge-rolling and fixing of two containers of different materials, combining them into a polygonal double-layer container.

[0006] This invention provides a side-rolling forming machine for a polygonal double-layer container, comprising: a machine base, the front end of which is connected to an upper base and a lower base. The upper base is a frame composed of a bottom plate, a flat plate, and two corresponding side plates. The lower base is composed of a support plate and a support base. A rotating mechanism disposed on the upper base includes a rotational power source, a rotating disk, and a male mold. The lower end face of the rotating disk has an annular groove and is connected to the male mold. The upper end face of the rotating disk is connected to a shaft, which is connected to the rotational power source. At least two side-rolling mechanisms are disposed around the periphery of the rotating mechanism. The mechanism includes a linkage seat, a side coiler, and a spring bearing. The side coiler includes a connecting rod, with a roller connected to the lower part of the connecting rod. The upper end of the connecting rod passes through the linkage seat and is connected to a guide wheel, which is located in the annular groove. One end of the spring bearing is fixed to the side plate, and the other end of the spring bearing is connected to the linkage seat by a spring. A lifting mechanism is provided on the lower base. The lifting mechanism includes a lifting power source, a lifting rod, and a lifting support platform. The lifting power source is provided on the support base and is connected to the lifting rod. The lifting rod extends through the support plate and is connected to the lifting support platform. A rotating carrier is provided on the lifting support platform, and the rotating carrier is connected to a mother mold.

[0007] The edge rolling forming machine for the polygonal double-layer container, wherein the rotational power source is mounted on a flat plate.

[0008] The edge rolling forming machine for the polygonal double-layer container, wherein the side of the linkage seat is connected to the side plate by a guide rod, wherein the guide rod passes through the linkage seat, enabling the linkage seat to move stably.

[0009] The edge rolling forming machine for the polygonal double-layer container, wherein the spring support is provided with a push plate, the bottom plate is provided with a push cylinder, and the push cylinder is connected to the push plate.

[0010] The edge rolling forming machine for the polygonal double-layer container is provided with corresponding magnetic elements for adsorption on the lifting support platform and the rotating carrier.

[0011] The aforementioned edge-rolling forming machine for a polygonal double-layer container includes a heater positioned on the machine platform facing the edge-rolling position of the male mold.

[0012] The edge rolling forming machine for the polygonal double-layer container, wherein the polygonal double-layer container is one of a square, rectangular, triangular or other irregularly shaped container.

[0013] The edge rolling forming machine for the polygonal double-layer container, wherein the shape of the annular track groove corresponds to the shape of the male mold.

[0014] The edge rolling forming machine for the polygonal double-layer container, wherein the annular track groove is further provided with two corresponding positioning grooves.

[0015] The edge rolling forming machine for the polygonal double-layer container, wherein the linkage seat and the spring bearing seat are respectively provided with receiving grooves, and the receiving grooves can accommodate and fix the spring.

[0016] The present invention also includes a polygonal double-layer container made using the aforementioned edge-rolling forming machine, comprising: a paper outer layer and a plastic inner layer, wherein the plastic inner layer is bonded to the paper outer layer, and the upper edge of the plastic inner layer is rolled together with the upper edge of the paper outer layer, wherein the plastic inner layer and the paper outer layer are polygonal bodies of the same shape.

[0017] This invention involves a polygonal double-layer container consisting of a paper outer layer and a plastic inner layer that are nested together but not rolled up. A lifting mechanism lifts the double-layer container, which is placed in a female mold, to the outer edge of a male mold. A servo motor drives a rotating disk and an annular track to rotate, causing guide wheels to follow the shape of the annular track and drive rollers to roll up the edges of the polygonal double-layer container at the roll-up point. Through rapid rotation, the edges of the two different materials are rolled up and fixed to form a composite double-layer container. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a top view of the present invention.

[0020] Figure 3 This is a schematic diagram of the lifting mechanism of the present invention.

[0021] Figure 4 This is a schematic diagram of the combination of the female mold and the male mold of the present invention.

[0022] Figure 5 This is a schematic diagram of the roller pressing wheel of the present invention.

[0023] Figure 6 This is a schematic diagram of the roller and double-layer container before rolling, according to the present invention.

[0024] Figure 7 This is a partial schematic diagram of the roller pressing wheel and the double-layer container pressing of the present invention.

[0025] Figure 8 This is a top view schematic diagram showing the preparation of operation for the edge rolling mechanism and the rotating mechanism of the present invention.

[0026] Figure 9 This is a top view schematic diagram of the operation of the edge rolling mechanism and the rotating mechanism of the present invention.

[0027] Figure 10 This is a top view of the heater and edge rolling mechanism of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1-Machine base; 2-Upper base; 21-Base plate; 22-Flat plate; 23-Side plate; 3-Lower base; 31-Support plate; 32-Support base; 4-Rotating mechanism; 41-Rotating power source; 42-Rotating disk; 421-Upper end face; 422-Lower end face; 423-Annular rail groove; 424-Positioning groove; 425-Shaft; 43-Male mold; 5-Side rolling mechanism; 51-Linkage seat; 52-Side rolling device; 521-Connecting rod; 522- Roller; 523-Guide roller; 53-Spring bearing; 54-Spring; 55-Accommodation groove; 56-Guide rod; 57-Push plate; 58-Push cylinder; 6-Lifting mechanism; 61-Lifting power source; 62-Lifting rod; 63-Lifting support platform; 64-Rotating carrier; 65-Master mold; 66-Magnetic element; 7-Polygonal double-layer container; 71-Plastic inner layer; 72-Paper outer layer; 8-Heater; 81-Heat pipe; A-Wrapping area; B-Side roll area. Detailed Implementation

[0029] The features of the present invention will be described in detail below through embodiments. First, please refer to... Figure 1 and Figure 2The figures shown are a three-dimensional structural diagram and a top view of a polygonal double-layer container edge rolling forming machine. The present invention provides a polygonal double-layer container edge rolling forming machine, comprising: a machine base 1, the front end of which is connected to an upper base 2 and a lower base 3. The upper base 2 is a seat body composed of a bottom plate 21, a flat plate 22, and two corresponding side plates 23. The lower base 3 is a seat body composed of a support plate 31 and a support base 32; and a rotating mechanism 4 disposed on the upper base 2, the rotating mechanism 4 comprising a rotating power source 41, a rotating disk 42, and a die 43. The rotary power source 41 is mounted on the flat plate 22; the rotary disk 42 has two end faces (421, 422), the lower end face 422 has an annular groove 423 and the center of the lower end face 422 is connected to the male mold 43, wherein the shape of the annular groove 423 corresponds to the shape of the male mold 43, and the annular groove 423 is provided with two corresponding positioning grooves 424. The upper end face 421 of the rotary disk 42 is connected to a shaft 425, which is connected to the rotary power source 41, so that the rotary disk 42 can be driven by the rotary power source 41 to rotate.

[0030] At least two side-winding mechanisms 5 are provided, which are arranged around the periphery of the rotating mechanism 4. In this embodiment, the two side-winding mechanisms 5 are arranged correspondingly. Each side-winding mechanism 5 includes a connecting seat 51, a side-winding device 52, two spring bearings 53 and two springs 54. The side-winding device 52 includes a connecting rod 521. A roller 522 is connected to the lower part of the connecting rod 521. The upper end of the connecting rod 521 passes through the connecting seat 51 and is connected to a guide wheel 523. A bearing (not shown) is provided between the connecting rod 521 and the connecting seat 51 so that the connecting rod 521 rotates with the guide wheel 523. The guide wheel 523 is located in the annular groove 423. The two spring bearings 53 are respectively arranged on both sides of the connecting seat 51. Each spring support 53 has two ends, one end of which is fixed to the side plate 23. The other end of the spring support 53 is connected to the side of the linkage seat 51 via a spring 54. In a further embodiment of the present invention, the linkage seat 51 and each spring support 53 are respectively provided with receiving grooves 55, which can accommodate and fix the spring 54. In addition, the bottom side of the linkage seat 51 is connected to the side plate 23 via a guide rod 56, wherein the guide rod 56 passes through the linkage seat 51, so that the linkage seat 51 can move stably. In a further embodiment of the present invention, a push plate 57 is connected in the middle of the linkage seat 51. The two sides of the push plate 57 can be pivotally connected to the two spring supports 53 respectively, so that the push plate 57 can be displaced by the spring support 53. The bottom plate 21 is provided with a push cylinder 58, which is connected to the push plate 57, so that the linkage seat 51 can be displaced when the push cylinder 58 pushes the push plate 57 to move, thereby driving the guide wheel 523 to move.

[0031] A lifting mechanism 6 is mounted on the lower base 3. The lifting mechanism 6 includes a lifting power source 61, a lifting rod 62, and a lifting support platform 63. The lifting power source 61 is mounted on the support base 32. The lifting power source 61 can be one of a cylinder, a hydraulic cylinder, or a motor. The lifting power source 61 is connected to the lifting rod 62. The lifting rod 62 extends through the support plate 31 and is connected to the lifting support platform 63. A rotating carrier 64 is mounted on the lifting support platform 63. The rotating carrier 64 is connected to a female mold 65. The lifting support platform 63 and the rotating carrier 64 are respectively provided with corresponding magnetic elements 66. The magnetic elements 66 are mainly used to position the rotating carrier 64.

[0032] The relationships between the various mechanisms of this invention will be further explained below by describing their operation methods. Please refer to [link / reference]. Figures 3-9 As shown, the polygonal double-layer container 7 is first placed in the master mold 65. In this embodiment of the invention, the polygon is one of a square, a rectangle or other irregularly shaped container. The polygonal double-layer container 7 includes: a plastic inner layer 71 and a paper outer layer 72. The plastic inner layer 71 is made of plastic, and the paper outer layer 72 is made of paper without a coating layer. The shape of the female mold 65 is the same as that of the polygonal double-layer container 7. After the polygonal double-layer container 7 is placed in the female mold 65, the lifting power source 61 drives the lifting rod 62 to rise and pushes the lifting support platform 63 upward until the female mold 65 and the male mold 43 are fitted together. Since the guide roller 523 and the roller 522 are pushed by the force of the spring 54 and are close to the inner edge of the annular track groove 423, the roller 522 is close to the male mold 43. In order for the roll-up point A of the plastic inner layer 71 and the paper outer layer 72 to reach the edge roll area B, the roller 522 must be far away from the male mold 43 to define the edge roll area B. Therefore, at the beginning of each operation, the positioning groove 424 must be located in a position where the guide roller 523 can be pushed. When the push cylinder 58 pushes the push plate 57 to move towards the side plate 23, it will also move the linkage seat 51 towards the side plate 23. The guide wheel 523 moves stably under the guidance of the guide rod 56 so that it can fall into the positioning groove 424. At this time, the roller 522 is away from the male mold 43, so that the roller 522 and the male mold 43 form a side roll area B with space. After the female mold 65 rises to the predetermined position, the push cylinder 58 will release the push plate 57. The spring 54 will push the linkage seat 51 towards the male mold 43, and the guide wheel 523 will leave the positioning groove 424 and abut against the inner edge of the annular track groove 423. Then the rotation power source 41 will start and the rotating disk 42 will be driven by the rotation power source 41 to rotate. The guide wheel 523 of the side roller 52 will be displaced with the rotation trajectory of the annular track groove 423, and the roller 522 under the guide wheel 523 will perform side roll forming operation on the roll-up area A of the polygonal double-layer container 7.

[0033] Please refer to Figure 10 As shown, in a further embodiment of the present invention, a heater 8 is provided on the machine base 1. The heater 8 uses a heat pipe 81 to guide the heat source to the periphery of the male mold 43 for softening the plastic inner layer 71 to facilitate edge rolling. The heater 8 can be a hot air heater, an infrared heater, or an electric heating wire heater. After the set number of edge rolling operations is completed, the rotating disk 42 returns to the original starting point position. At this time, the push cylinder 58 pushes the push plate 57 towards the side plate 23 and causes the linkage seat 51 to drive the guide wheel 523 to move into the positioning groove 424. The lifting power source 61 of the subsequent lifting mechanism 6 lowers the lifting support platform 63 and the female mold 65 so that the worker or robotic arm can take out the polygonal double-layer container 7 with the edge rolled, and proceed to the next operation.

[0034] Please see Figures 4-5 As shown, since the male mold 43, female mold 65 and rotating carrier 64 rotate in conjunction during the edge rolling forming operation, in order to allow the female mold 65 to return to its original starting point after the operation is completed, corresponding magnetic elements 66 are provided on the bottom of the rotating carrier 64 that carries the female mold 65 and the top surface of the lifting support platform 63, respectively. The magnetic elements 66 are mainly used to position the rotating carrier 64 to ensure that the relative positions of the female mold 65 and the male mold 43 are correct before each operation.

[0035] The present invention further utilizes a polygonal double-layer container 7 manufactured by the aforementioned edge-rolling forming machine, comprising: a plastic inner layer 71 and a paper outer layer 72. The plastic inner layer 71 is bonded within the paper outer layer 72, and the upper edge of the plastic inner layer 71 and the upper edge of the paper outer layer 72 are rolled together. The plastic inner layer 71 and the paper outer layer 72 are polygonal bodies of the same shape. In this invention, the polygonal double-layer container 7 is a lunch box, a food storage container, or a microwave-safe container, and the polygon can be square, rectangular, triangular, or other irregularly shaped.

[0036] The present invention has the following advantages:

[0037] 1. By utilizing the shape of the annular track groove to correspond to the shape of the male and female molds, the rollers drive the polygonal double-layer container to roll more smoothly and evenly, ensuring that each roll is subjected to uniform roller pressure. Furthermore, the top edge of the plastic inner layer is closer to the body of the paper outer layer, resulting in a better covering effect and preventing scratches to the user.

[0038] 2. Various irregularly shaped products can be produced simply by changing the shape of the annular track groove and the male and female molds, without the need to redesign the mechanical structure.

[0039] 3. The rollers can be replaced according to different edge roll sizes, and the edge roller can be designed in multiple sets to speed up the forming process.

[0040] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made based on the content of the present invention shall still fall within the scope of the present invention patent.

Claims

1. A side-rolling forming machine for a polygonal double-layer container, characterized in that, Include: A machine platform, the front end of which is connected to an upper base and a lower base. The upper base is a frame composed of a bottom plate, a flat plate and two corresponding side plates, and the lower base is composed of a support plate and a support base. A rotating mechanism is provided on an upper base. The rotating mechanism includes a rotating power source, a rotating disk and a male mold. The lower end face of the rotating disk has an annular groove and is connected to the male mold. The upper end face of the rotating disk is connected to a shaft and is connected to the rotating power source. At least two side winding mechanisms are provided around the periphery of the rotating mechanism. The side winding mechanism includes a linkage seat, a side winding device, and a spring bearing. The side winding device includes a connecting rod, with a roller connected to the lower part of the connecting rod. The upper end of the connecting rod passes through the linkage seat and is connected to a guide wheel. The guide wheel is located in the annular groove. One end of the spring bearing is fixed to the side plate, and the other end of the spring bearing is connected to the linkage seat by a spring. A lifting mechanism is provided on a lower base. The lifting mechanism includes a lifting power source, a lifting rod, and a lifting support platform. The lifting power source is provided on a support base and is connected to the lifting rod. The lifting rod extends through a support plate and is connected to the lifting support platform. A rotating carrier is provided on the lifting support platform and is connected to a mother mold.

2. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The rotating power source is mounted on the flat plate.

3. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The linkage seat is connected to the side plate by a guide rod, enabling the linkage seat to move stably.

4. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The spring support is provided with a push plate, and the base plate is provided with a push cylinder, which is connected to the push plate.

5. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The lifting platform and the rotating carrier are each equipped with corresponding magnetic elements for adsorption.

6. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The machine is equipped with a heater at the edge of the die.

7. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The shape of the annular groove corresponds to the shape of the male mold.

8. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The annular track groove is also equipped with two corresponding positioning grooves.

9. The edge rolling forming machine for a polygonal double-layer container as described in claim 1, characterized in that: The linkage seat and the spring bearing seat are each provided with a receiving groove, which can be used to accommodate and fix the spring.

10. A polygonal double-layer container manufactured by a side-rolling forming machine for polygonal double-layer containers as described in any one of claims 1 to 9, characterized in that, It comprises: a plastic inner layer and a paper outer layer; the plastic inner layer is bonded to the paper outer layer, and the upper edge of the plastic inner layer is rolled together with the upper edge of the paper outer layer, wherein the plastic inner layer and the paper outer layer are polygonal bodies of the same shape.

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