Single-machine one-step double-layer thermoforming equipment and its kit

Abstract

This invention discloses a single-machine one-step double-layer thermoforming processing equipment and its assembly. The processing equipment includes: a mold-closing device; an extruder; a cutting device; an upper conveyor device, whose upper conveyor belt can receive the cut plastic sheet; an upper transfer mechanism, which is provided with an upper traveling mechanism and a receiving mechanism, the receiving mechanism can receive the upper plastic sheet sent by the upper conveyor device, and can lift the upper plastic sheet into the upper mold of the mold-closing device and be vacuum-absorbed by the upper mold; a lower transfer mechanism; a lower conveyor device, which is fixed on the lower transfer mechanism, can receive the lower plastic sheet output from the upper conveyor belt of the upper conveyor device, and when the lower transfer mechanism moves into the mold-closing device, it can send the lower plastic sheet onto the lower mold of the mold-closing device; the upper mold and lower mold of the mold-closing device close together, and the upper plastic sheet in the upper mold and the lower plastic sheet in the lower mold are fused together as one unit. This invention has the beneficial effects of simple structure, low cost, energy saving, and high pressure resistance.

Description

Technical Field

[0001] This invention relates to a single-machine one-step double-layer thermoforming processing equipment and its kit. Background Technology

[0002] Double-layer thermoforming products are widely used due to their ultra-long service life, low-temperature resistance, tear resistance, impact resistance, high strength, ability to be molded into complex shapes, easy processing, low cost, and good cushioning effect. Double-layer thermoforming products include: double-layer thermoformed pallets, lids, bottoms, and sides of palletized boxes, reusable packaging, and automotive air ducts. Taking double-layer thermoformed pallets as an example, they are used for containerizing, stacking, handling, and transporting goods, greatly improving logistics efficiency. Commonly used pallets are mainly made of wood, but with the changing needs of logistics... With the continuous growth of demand, double-layer blister trays have gradually gained application. In existing technologies, double-layer blister tray processing equipment is usually equipped with a left extruder and a right extruder, which cut the plastic sheets into left and right plastic sheets respectively. The left and right plastic sheets are then transported to the upper and lower molds of the press via left and right carriages respectively. Finally, the molds are closed and fused together to form a double-layer blister tray. Due to the dual-extrusion mode of the left and right extruders, the equipment is large, occupies a large area, has low utilization rate, and consumes a lot of electricity, which increases the processing cost of double-layer blister trays. Summary of the Invention

[0003] To address the above shortcomings, this invention provides a single-machine one-step double-layer thermoforming processing equipment and its kit, which integrates the dual-machine extrusion mode of the left and right extruders into a single-machine extrusion mode.

[0004] The technical solution of this invention is:

[0005] A single-machine, one-step, double-layer thermoforming processing equipment includes:

[0006] A mold-forming device, which is equipped with an upper mold and a lower mold for forming double-layer thermoformed products;

[0007] An extruder, which can continuously extrude plastic sheets at high temperatures;

[0008] The cutting device is fixed at the outlet of the extruder. When the plastic sheet extruded by the extruder reaches the predetermined length, the cutter in the cutting device can cut the plastic sheet.

[0009] The upper conveyor device has an upper conveyor belt that can receive the cut plastic sheets. Each double-layer blister product is equipped with two plastic sheets, namely an upper plastic sheet and a lower plastic sheet.

[0010] The upper transfer mechanism is equipped with an upper traveling mechanism and a receiving mechanism. The upper traveling mechanism can travel back and forth along two upper guide rails, and the receiving mechanism can receive the upper plastic sheet sent out by the upper conveying device, lift the upper plastic sheet and send it into the upper mold of the mold closing device, where it is vacuum-adsorbed by the upper mold.

[0011] The lower transfer mechanism is equipped with a lower traveling mechanism that can travel back and forth along two lower guide rails, which are located below the upper guide rail.

[0012] The lower conveyor is fixed on the lower transfer mechanism. When the lower transfer mechanism moves toward the mold closing equipment, the lower conveyor belt of the lower conveyor can receive the lower plastic sheet output from the upper conveyor belt of the upper conveyor. When the lower transfer mechanism moves into the mold closing equipment, the lower conveyor belt rotates and moves with the lower transfer mechanism, which can deliver the lower plastic sheet to the lower mold of the mold closing equipment.

[0013] The upper mold of the mold closing device can move down and close with the lower mold under the action of the hydraulic cylinder. The upper plastic sheet in the upper mold and the lower plastic sheet in the lower mold are fused together. By injecting air and maintaining pressure, a partial hollow is formed. After cooling, the pressure is released and the mold is demolded to form a double-layer thermoformed product.

[0014] The controller controls the electrical components to complete the processing actions according to a predetermined program.

[0015] Preferably, the upper conveying device further includes:

[0016] frame;

[0017] The upper driving wheel and the upper driven wheel are rotatably fixed to the frame;

[0018] The upper transmission motor has its housing fixed to the frame and its rotating shaft fixed to the upper drive wheel.

[0019] The upper conveyor belt surrounds the upper driving wheel and the upper driven wheel;

[0020] The lower conveyor device includes:

[0021] The lower driving wheel and the lower driven wheel are rotatably fixed on the transfer bracket of the lower transfer mechanism;

[0022] The lower conveyor motor has its housing fixed to the transfer bracket of the lower transfer mechanism, and its rotating shaft fixed to the lower drive wheel;

[0023] The lower conveyor belt surrounds the lower driving wheel and the lower driven wheel.

[0024] The upper traveling mechanism of the upper transfer mechanism includes:

[0025] The transfer bracket is fixed with multiple sliders that are adapted to the upper guide rail, and the multiple sliders can only slide along the upper guide rail;

[0026] The speed reducer has its housing fixed to the transfer bracket;

[0027] The servo motor has its housing fixed to the housing of the reducer, and the servo motor's rotating shaft is connected to the input shaft of the reducer.

[0028] Multiple bushings are provided and are fixed to the transfer bracket;

[0029] A rotating shaft is rotatably connected to a bushing and fixedly connected to the output shaft of the reducer. Gears are fixed at both ends of the rotating shaft. The two gears mesh with two spur racks, which are fixed on the guide rail frame.

[0030] Preferably, the receiving mechanism of the upper transfer mechanism includes:

[0031] The base plate is fixed to the transfer bracket;

[0032] The upper bracket consists of a rectangular structure made up of four long rods and fixed to the base plate. Each long rod has multiple toothed plates fixed on it.

[0033] Multiple supports are provided, which are fixed to the base plate and located inside the upper bracket;

[0034] Multiple receiving cylinders are provided. The cylinder body of the receiving cylinder is fixed to the transfer bracket, and the piston rod of the receiving cylinder is fixed to the receiving base plate.

[0035] When the upper transfer mechanism moves toward the mold closing device, the multiple teeth and supports on the upper transfer mechanism can receive the upper plastic sheet output from the upper conveyor belt of the upper conveying device.

[0036] When the upper plastic sheet is delivered to the bottom of the mold on the mold clamping device, the piston rod of the receiving cylinder can extend to lift the upper plastic sheet and press it tightly against the upper mold. The suction hole in the upper mold starts to draw in air and generate negative pressure, which can hold the upper plastic sheet tightly against the upper mold. After that, the piston rod of the receiving cylinder retracts and resets.

[0037] Preferably, the lower traveling mechanism of the lower transfer mechanism has the same structure as the upper traveling mechanism of the upper transfer mechanism.

[0038] Preferably, when the four long rods of the upper bracket form a rectangular structure, each long rod has an extension section. By changing the length of the extension section, the size of the rectangular structure can be changed.

[0039] A reinforcing component conveying mechanism is installed near the upper and lower guide rails. The upper transfer mechanism is fixed with a reinforcing component placement mechanism. The reinforcing component conveying mechanism can send the reinforcing component from outside the processing equipment into the processing equipment, and the reinforcing component placement mechanism can clamp the reinforcing component from the reinforcing component conveying mechanism.

[0040] Preferably, the reinforcing member includes:

[0041] Square tubes, round tubes, square rods and / or round rods.

[0042] The aforementioned reinforcing member conveying mechanism includes:

[0043] Conveyor frame;

[0044] The conveyor rails are provided in two sections, which are fixed parallel to each other on the conveyor frame.

[0045] The conveying slider is configured in multiples for each conveying guide rail, and the conveying slider can only move along the length of the conveying guide rail;

[0046] A workbench, which can hold a reinforcing component for processing double-layer thermoformed products at a predetermined position, and the conveying slider is fixed below the workbench.

[0047] The conveying cylinder has its cylinder body fixed to the bottom surface of the worktable, and its piston rod fixed to the conveyor frame.

[0048] When the piston rod of the delivery cylinder extends, the worktable moves outward, and a manual or robotic person can place a reinforcing member at a predetermined position on the worktable.

[0049] Preferably, the reinforcing member placement mechanism includes:

[0050] Place the rack;

[0051] Multiple placement cylinders are provided. The cylinder body of the placement cylinder is fixed to the transfer bracket, and the piston rod of the placement cylinder is fixed to the placement frame.

[0052] Clamping cylinders, with two or more for each reinforcing member, the cylinder body of the clamping cylinder is fixed to the placement frame, and the robotic arm of the clamping cylinder can clamp the reinforcing member;

[0053] When the reinforcing component placement mechanism is located above the reinforcing component conveying mechanism and the piston rod of the placement cylinder extends, it drives the clamping cylinder to move downward, and the manipulator of the clamping cylinder can clamp the reinforcing component at a predetermined position in the reinforcing component conveying mechanism.

[0054] After the lower conveyor belt of the current conveyor delivers the lower plastic sheet to the lower mold of the mold closing device and exits the mold closing device, the robotic arm holding the clamping cylinder can place the reinforcing member on the lower plastic sheet.

[0055] A single-machine one-step double-layer thermoforming processing equipment set includes two sets of the aforementioned single-machine one-step double-layer thermoforming processing equipment, and also includes a bidirectional fork receiving mechanism. The two sets of single-machine one-step double-layer thermoforming processing equipment are arranged side by side, and the bidirectional fork receiving mechanism is placed between the two mold closing devices. The bidirectional fork receiving mechanism can alternately receive the double-layer thermoformed products demolded from the mold closing devices by manual labor or a robotic arm. The bidirectional fork receiving mechanism includes:

[0056] Material receiving rack;

[0057] Two material receiving guides are provided, which are fixed parallel to each other on the material receiving frame;

[0058] The receiving slider is configured with two or more on each receiving guide rail, and the receiving slider can only slide along the receiving guide rail;

[0059] For each material receiving guide rail, there are two or more threaded blocks for receiving materials.

[0060] The threaded rod is rotatably fixed to the receiving frame at both ends by brackets;

[0061] The receiving platform has the aforementioned receiving threaded block and receiving slider fixed on its bottom surface;

[0062] The receiving motor has its housing fixed to the receiving frame, and its rotating shaft is linked to the threaded rod.

[0063] The receiving motor can control the receiving platform to move toward either of the two mold closing devices by rotating forward or backward.

[0064] Compared with the prior art, the present invention has the following advantages:

[0065] The upper and lower plastic sheets are processed using only one extruder, which greatly simplifies the equipment; it has a small footprint and low power consumption; it shortens the processing time; and it has added reinforcing parts to improve strength.

[0066] This invention has the advantages of simple structure, low cost, energy saving, high pressure resistance, and high working efficiency. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0068] Figure 2 for Figure 1 A three-dimensional image.

[0069] Figure 3 This is a schematic diagram of the upper traveling mechanism of the present invention.

[0070] Figure 4 This is a schematic diagram of the upper guide rail structure of the present invention.

[0071] Figure 5 , Figure 6 This is a schematic diagram of the receiving mechanism structure of the present invention.

[0072] Figure 7 This is a schematic diagram of the reinforcing component conveying mechanism of the present invention.

[0073] Figure 8 for Figure 7 A schematic diagram of the internal structure.

[0074] Figure 9 This is a schematic diagram of the reinforcing member placement mechanism of the present invention.

[0075] Figure 10 This is a schematic diagram of the overall structure of the kit device of the present invention.

[0076] Figure 11 This is a schematic diagram of the bidirectional fork receiving mechanism of the present invention. Detailed Implementation

[0077] The present invention will now be further described with reference to the accompanying drawings:

[0078] Example 1: As Figure 1 and Figure 2 As shown, a single-machine one-step double-layer thermoforming processing equipment includes:

[0079] The mold-closing device 8 is equipped with an upper mold 81 and a lower mold 82 for forming double-layer thermoformed products;

[0080] Extruder 1, which can continuously extrude plastic sheets at high temperatures;

[0081] The cutting device 11 is fixed at the outlet of the extruder 1. When the plastic sheet extruded by the extruder 1 reaches a predetermined length, the cutter in the cutting device 11 can cut the plastic sheet.

[0082] The cutting device 11 can be equipped with a cutting cylinder to mount the cutter, and the piston rod of the cutting cylinder is controlled to complete the cutting action;

[0083] The upper conveyor device 3 has an upper conveyor belt 30 that can receive the cut plastic sheets. Each double-layer blister product is equipped with two plastic sheets, namely an upper plastic sheet and a lower plastic sheet.

[0084] The upper transfer mechanism 2 is equipped with an upper traveling mechanism and a receiving mechanism 28. The upper traveling mechanism can travel back and forth along two upper guide rails 41, and the receiving mechanism can receive the upper plastic sheet sent out by the upper conveying device 3, and can lift the upper plastic sheet into the upper mold 81 of the mold closing device 8 and be vacuum-adsorbed by the upper mold 81.

[0085] The lower transfer mechanism 5 is equipped with a lower traveling mechanism, which can travel back and forth along two lower guide rails 51, which are located below the upper guide rail 41.

[0086] The lower conveyor 6 is fixed on the lower transfer mechanism 5. When the lower transfer mechanism 5 moves toward the mold closing device 8, the lower conveyor belt 60 of the lower conveyor 6 can receive the lower plastic sheet output from the upper conveyor belt 30 of the upper conveyor 3. When the lower transfer mechanism 5 moves into the mold closing device 8, the lower conveyor belt 60 rotates and moves with the lower transfer mechanism 5, and can send the lower plastic sheet to the lower mold 82 of the mold closing device 8.

[0087] Under the action of the hydraulic cylinder, the upper mold 81 of the mold closing device 8 can move down to close with the lower mold 82. The upper plastic sheet in the upper mold 81 and the lower plastic sheet in the lower mold 82 are fused together. Through air injection and pressure holding, a partial hollow is formed. After cooling, the pressure holding is released and the mold is demolded to form a double-layer thermoformed product.

[0088] The controller controls the electrical components to complete the processing actions according to a predetermined program.

[0089] It should be noted that some products, such as double-layer blister trays, typically require dimensions of several square meters and a certain thickness, thus necessitating a large amount of plastic. When the plastic extruder 1 extrudes the plastic sheet, the speed is relatively slow. Therefore, even with two extruders operating simultaneously, the existing dual-machine structure technology struggles to increase processing speed. In this invention, since the upper conveyor 3 is fixed in position and can continuously receive the plastic sheet output from the extruder 1, it essentially functions as a storage device. This structure significantly improves efficiency and shortens the waiting time during extrusion compared to existing technologies. Furthermore, the upper conveyor 3 can quickly transfer the plastic sheet to the lower conveyor belt 60 or the receiving mechanism 28 of the upper transfer mechanism 2, thus reducing the overall processing time.

[0090] It should also be noted that when the upper and lower plastic sheets are extruded from the extruder 1, it is at the temperature at which the plastic melts. At this temperature, the upper plastic sheet in the upper die 81 and the lower plastic sheet in the lower die 82 can be fused together.

[0091] By setting up an upper conveying device 3 and a lower conveying device 6, the present invention completes the processing of the upper and lower plastic sheets using only one extruder 1, which greatly simplifies the equipment. Since the extruder 1 is a large piece of equipment, occupies a large area, and consumes a lot of electricity, the single-machine structure of the present invention significantly reduces equipment costs, reduces the floor space, and also significantly reduces energy consumption and shortens processing time.

[0092] Furthermore, the upper conveying device 3 also includes:

[0093] frame;

[0094] The upper driving wheel and the upper driven wheel are rotatably fixed to the frame;

[0095] The upper transmission motor has its housing fixed to the frame and its rotating shaft fixed to the upper drive wheel.

[0096] The upper conveyor belt surrounds the upper driving wheel and the upper driven wheel 30 times;

[0097] The lower conveyor 6 includes:

[0098] The lower driving wheel and the lower driven wheel are rotatably fixed on the transfer bracket of the lower transfer mechanism 5;

[0099] The lower conveyor motor has its housing fixed to the transfer bracket of the lower transfer mechanism 5, and its rotating shaft fixed to the lower drive wheel;

[0100] The lower conveyor belt circles the lower drive wheel and the lower driven wheel 60 degrees.

[0101] The upper conveyor belt 30 and the lower conveyor belt 60 can be made of high-temperature resistant belts. This invention is equivalent to replacing one extruder with two sets of conveying devices 3.

[0102] Furthermore, such as Figure 3 and Figure 4 As shown, the upper traveling mechanism of the upper transfer mechanism 2 includes:

[0103] The transfer bracket 20 is fixed with multiple sliders 27 that are adapted to the upper guide rail 41. The multiple sliders 27 can only slide along the upper guide rail 41.

[0104] The reducer 43 has its housing fixed to the transfer bracket 20;

[0105] The servo motor 42 has its housing fixed to the housing of the reducer 43, and the rotating shaft of the servo motor 42 is connected to the input shaft of the reducer 43.

[0106] Multiple bushings 44 are provided and are fixed to the transfer bracket 20;

[0107] A rotating shaft 40 is rotatably connected to a bushing 44 and fixedly connected to the output shaft of a reducer 43. Gears 46 are fixed at both ends of the rotating shaft 40. The two gears 46 mesh with two spur racks 45 respectively. The two spur racks 45 are fixed on the guide rail frame 48 respectively.

[0108] It features high control precision through the meshing of gears and racks.

[0109] Furthermore, such as Figure 5 and Figure 6 As shown, the receiving mechanism 28 of the upper transfer mechanism 2 includes:

[0110] The base plate 284 is fixed to the transfer bracket 20;

[0111] The upper bracket 281 consists of a rectangular structure composed of four long rods and is fixed to the base plate 284. Each long rod has multiple toothed pieces 282 fixed on it. The connecting angles of the four long rods are fixed by connecting plates.

[0112] Multiple supports 283 are provided and are fixed on the base plate 284 and located inside the upper bracket 281.

[0113] There are multiple receiving cylinders 285. The cylinder body of the receiving cylinder 285 is fixed to the transfer bracket 20, and the piston rod of the receiving cylinder 285 is fixed to the receiving base plate 284.

[0114] When the upper transfer mechanism 2 moves toward the mold closing device 8, the multiple toothed pieces 282 and the support 283 on the upper transfer mechanism 2 can receive the upper plastic sheet output from the upper conveyor belt 30 of the upper conveying device 3.

[0115] When the upper plastic sheet is delivered to the lower part of the upper mold 81 of the mold closing device 8, the piston rod of the receiving cylinder 285 can extend to lift the upper plastic sheet and press it tightly against the upper mold 81. The suction hole in the upper mold 81 starts to suck in air and generate negative pressure, which can hold the upper plastic sheet tightly against the upper mold 81. After that, the piston rod of the receiving cylinder 285 retracts and resets.

[0116] Similarly, the lower traveling mechanism of the lower transfer mechanism 5 has the same structure as the upper traveling mechanism of the upper transfer mechanism 2. The lower traveling mechanism travels on the lower guide rail 51, and the upper traveling mechanism travels on the upper guide rail 41.

[0117] In order to accommodate blister packaging products of different sizes, such as Figure 5 and Figure 6 As shown, when the four long rods of the upper bracket 281 form a rectangular structure, each long rod has an extension section 2810. By changing the length of the extension section 2810, the size of the rectangular structure can be changed; this structure can reduce costs and facilitate management.

[0118] Example 2:

[0119] Based on Example 1, such as Figure 7-9 As shown, a reinforcing component conveying mechanism 7 is installed near the upper guide rail 41 and the lower guide rail 61. A reinforcing component placement mechanism is fixed to the upper transfer mechanism 2. The reinforcing component conveying mechanism 7 can send the reinforcing component 76 from outside the processing equipment into the processing equipment. The reinforcing component placement mechanism can clamp the reinforcing component 76 from the reinforcing component conveying mechanism 7.

[0120] We know that the load-bearing capacity of thermoformed products mainly depends on the strength of the plastic, which in turn depends on the material, thickness, etc. In order to improve the load-bearing capacity of double-layer thermoformed products, choosing better materials and increasing the thickness will significantly increase the cost. In order to reduce the cost and improve the load-bearing capacity of thermoformed products, it is necessary to add reinforcing components to the thermoformed products, thereby significantly increasing the load-bearing capacity of the thermoformed products without increasing the cost by much.

[0121] Preferably, the reinforcing member 76 includes:

[0122] Square tubes, round tubes, square rods and / or round rods, made of materials such as steel, wood, bamboo, etc., are characterized by low cost and high compressive strength.

[0123] Furthermore, the reinforcing component conveying mechanism 7 includes:

[0124] Conveyor frame 71;

[0125] Two conveyor rails 73 are provided and are fixed parallel to each other on the conveyor frame 71.

[0126] The conveying slider 74 is configured in multiple ways for each conveying guide rail 73, and the conveying slider 74 can only move along the length of the conveying guide rail 73;

[0127] The worktable 75 is designed to hold a reinforcing member 36 for processing double-layer thermoformed products at a predetermined position, and a conveyor slider 74 is fixed below the worktable 75.

[0128] The conveying cylinder 72 has its cylinder body fixed to the bottom surface of the worktable 75, and its piston rod is fixed to the conveyor frame 71.

[0129] When the piston rod of the conveying cylinder 72 extends, the worktable 75 moves outward, and a person or a robot can place the reinforcing member 76 at a predetermined position on the worktable 75.

[0130] The reinforcement placement mechanism includes:

[0131] Placement rack 77;

[0132] Multiple placement cylinders are provided. The cylinder body of the placement cylinder is fixed to the transfer bracket 20, and the piston rod of the placement cylinder is fixed to the placement frame 77.

[0133] Clamping cylinders 78, two or more are configured for each reinforcing member 76, the cylinder body of clamping cylinder 78 is fixed to the placement frame 77, and the robotic arm of clamping cylinder 78 can clamp reinforcing member 76.

[0134] When the reinforcing component placement mechanism is located above the reinforcing component conveying mechanism 7 and the piston rod of the placement cylinder extends, it drives the clamping cylinder 78 to move downward, and the robotic arm of the clamping cylinder 78 can clamp the reinforcing component 76 at a predetermined position in the reinforcing component conveying mechanism 7.

[0135] After the lower conveyor belt 60 of the current conveyor device 6 delivers the lower plastic sheet to the lower mold 82 of the mold closing device 8 and exits the mold closing device 8, the robotic arm holding the clamping cylinder 78 can place the reinforcing member 76 on the lower plastic sheet.

[0136] By setting up a reinforcing component conveying mechanism 7 and a reinforcing component placement mechanism, labor costs can be reduced and safety performance can be improved.

[0137] This invention also discloses a single-machine one-step double-layer thermoforming processing kit, including two sets of single-machine one-step double-layer thermoforming processing equipment, and a bidirectional fork receiving mechanism 9. The two sets of single-machine one-step double-layer thermoforming processing equipment are arranged side by side, and the bidirectional fork receiving mechanism 9 is placed between the two mold closing devices 8. The bidirectional fork receiving mechanism 9 can alternately receive the double-layer thermoformed products demolded from the mold closing device 8 by manual labor or a robotic arm. The bidirectional fork receiving mechanism 9 includes:

[0138] Material receiving rack 92;

[0139] Two material receiving guide rails 95 are provided and are fixed parallel to each other on the material receiving frame 92.

[0140] The receiving slider is configured with two or more on each receiving guide rail 95, and the receiving slider can only slide along the receiving guide rail 95.

[0141] Material receiving threaded blocks 93, and at least two of each material receiving guide rail 95 are configured;

[0142] The threaded rod 94 is rotatably fixed at both ends to the receiving rack 92 by brackets;

[0143] The receiving platform 91 has a receiving threaded block 93 and a receiving slider fixed on its bottom surface;

[0144] The receiving motor has its housing fixed to the receiving frame 92, and its rotating shaft is linked to the threaded rod 94.

[0145] The receiving motor can control the receiving platform 91 to move toward either of the two mold closing devices 8 by rotating forward or backward.

[0146] Double-layer thermoforming products include:

[0147] Double-layer blister trays, lids of collapsible boxes, bottoms of collapsible boxes, collapsible box panels, reusable packaging boards, or automotive air ducts—it should be noted that the basic structures of these products are all known.

[0148] The kit of the present invention can further reduce labor costs.

[0149] This invention also discloses a processing method for a single-machine one-step double-layer thermoforming equipment. Example 1 includes the following steps:

[0150] S1. Plastic raw materials are plasticized by an extruder and extruded into plastic sheets through a flat die at high temperature, which are then laid flat on the upper conveyor belt 30;

[0151] S2. Cutting device 11 cuts the plastic sheet on the upper conveyor belt 30 to a predetermined length to form an upper plastic sheet and a lower plastic sheet;

[0152] S3. The upper conveyor belt 30 conveys the cut upper and lower plastic sheets to the lower conveyor belt 60 of the lower transfer mechanism 5 and the receiving mechanism 28 of the upper transfer mechanism 2, respectively.

[0153] S4. The upper plastic sheet is conveyed by the upper transfer mechanism 2 into the mold closing device 8 and lifted by the receiving mechanism 28 into the upper mold 81 of the mold closing device 8, and is adsorbed into the upper mold 81 by the generated negative pressure;

[0154] S5. The lower plastic sheet is conveyed to the mold closing device 8 by the lower transfer mechanism 5. It is conveyed to the lower mold 82 by the movement of the lower transfer mechanism 5 and the rotation of the lower conveyor belt 60, and is adsorbed on the lower mold 82 by the negative pressure generated by the air port of the lower mold 82.

[0155] S6. The upper mold 81 and lower mold 82 of the mold closing device 8 are closed, the upper plastic sheet and the lower plastic sheet are fused together, and a partial hollow is formed by air injection and pressure holding;

[0156] S7. After cooling, release the pressure and demold to form a double-layer thermoformed product.

[0157] Example 2, based on Example 1, in step S3, the reinforcing member placement mechanism on the upper transfer mechanism 2 can hold the reinforcing member 76 by a robotic arm;

[0158] After step S5, the robot arm places the reinforcing member 76 at the predetermined position on the lower plastic sheet.

[0159] Before step S3, the reinforcing member conveying mechanism 7 pre-feeds the reinforcing member 76 from outside the processing equipment into the processing equipment, and the reinforcing member placement mechanism clamps the reinforcing member 76 from the reinforcing member conveying mechanism 7.

[0160] Example 3: Based on Examples 1 and 2, two sets of double-layer thermoforming product processing equipment are set up, and each step of the two sets of double-layer thermoforming product processing equipment is completed alternately.

Claims

1. A single-machine, one-step, double-layer thermoforming processing equipment, characterized in that it comprises: The mold-closing device (8) is equipped with an upper mold (81) and a lower mold (82) for forming double-layer thermoformed products. Extruder (1), which can continuously extrude plastic sheets at high temperatures; The cutting device (11) is fixed at the outlet of the extruder (1). When the plastic sheet extruded by the extruder (1) reaches the predetermined length, the cutter in the cutting device (11) can cut the plastic sheet. The upper conveyor (3) has an upper conveyor belt (30) that can receive the cut plastic sheet. Each double-layer blister product is equipped with two plastic sheets, namely the upper plastic sheet and the lower plastic sheet. The upper transfer mechanism (2) is provided with an upper traveling mechanism and a receiving mechanism (28). The upper traveling mechanism can travel back and forth along two upper guide rails (41), and the receiving mechanism can receive the upper plastic sheet sent out by the upper conveying device (3). It can lift the upper plastic sheet and send it into the upper mold (81) of the mold closing device (8) and be vacuum-adsorbed by the upper mold (81). The lower transfer mechanism (5) is equipped with a lower traveling mechanism, which can travel back and forth along two lower guide rails (51), which are located below the upper guide rail (41). The lower conveyor (6) is fixed on the lower transfer mechanism (5). When the lower transfer mechanism (5) moves toward the mold closing device (8), the lower conveyor belt (60) of the lower conveyor (6) can receive the lower plastic sheet output from the upper conveyor belt (30) of the upper conveyor (3). When the lower transfer mechanism (5) moves into the mold closing device (8), the lower conveyor belt (60) rotates and moves with the lower transfer mechanism (5), which can send the lower plastic sheet to the lower mold (82) of the mold closing device (8) and be vacuum-adsorbed by the lower mold (82). The upper mold (81) of the mold closing device (8) can move down and close with the lower mold (82) under the action of the hydraulic cylinder. The upper plastic sheet in the upper mold (81) and the lower plastic sheet in the lower mold (82) are fused together. By injecting air and maintaining pressure, a partial hollow is formed. After cooling, the pressure is released and the mold is demolded to form a double-layer thermoformed product. The controller controls the electrical components to complete the processing actions according to a predetermined program.

2. The single-machine one-step double-layer thermoforming equipment as described in claim 1, characterized in that: The upper conveying device (3) includes: frame; The upper driving wheel and the upper driven wheel are rotatably fixed to the frame; The upper transmission motor has its housing fixed to the frame and its rotating shaft fixed to the upper drive wheel. The upper conveyor belt (30) surrounds the upper driving wheel and the upper driven wheel; The lower conveying device (6) includes: The lower driving wheel and the lower driven wheel are rotatably fixed on the lower transfer bracket of the lower transfer mechanism (5); The lower conveyor motor has its housing fixed to the lower transfer bracket of the lower transfer mechanism (5), and its rotating shaft fixed to the lower drive wheel; The lower conveyor belt (60) surrounds the lower drive wheel and the lower driven wheel.

3. The single-machine one-step double-layer thermoforming equipment as described in claim 1, characterized in that, The upper transfer mechanism (2) includes an upper traveling mechanism comprising: The upper transfer bracket (20) is fixed with multiple sliders (27) adapted to the upper guide rail (41), and the multiple sliders (27) can only slide along the upper guide rail (41); The reducer (43) has its housing fixed to the upper transfer bracket (20); The servo motor (42) has its housing fixed to the housing of the reducer (43), and the shaft of the servo motor (42) is connected to the input shaft of the reducer (43); Multiple bushings (44) are provided and are fixed to the upper transfer bracket (20); A rotating shaft (40) is rotatably connected to a bushing (44) and fixedly connected to the output shaft of a reducer (43). Gears (46) are fixed at both ends of the rotating shaft (40). The two gears (46) mesh with two straight racks (45) respectively. The two straight racks (45) are fixed on the guide rail frame (48). The receiving mechanism (28) of the upper transfer mechanism (2) includes: The base plate (284) is fixed to the upper transfer bracket (20); The upper bracket (281) consists of a rectangular structure made up of four long rods and is fixed on the base plate (284). Each long rod has multiple toothed pieces (282) fixed on it. Multiple supports (283) are provided, which are fixed on the base plate (284) and located inside the upper bracket (281); Multiple receiving cylinders (285) are provided. The cylinder body of the receiving cylinder (285) is fixed to the upper transfer bracket (20), and the piston rod of the receiving cylinder (285) is fixed to the receiving base plate (284). When the upper transfer mechanism (2) moves toward the mold closing device (8), the multiple toothed pieces (282) and the support (283) on the upper transfer mechanism (2) can receive the upper plastic sheet output by the upper conveyor belt (30) of the upper conveying device (3); When the upper plastic sheet is delivered to the lower part of the upper mold (81) of the mold closing device (8), the piston rod of the receiving cylinder (285) can extend to lift the upper plastic sheet and press it tightly against the upper mold (81). The suction hole in the upper mold (81) starts to suck in air and generate negative pressure to hold the upper plastic sheet tightly against the upper mold (81). After that, the piston rod of the receiving cylinder (285) retracts and resets.

4. The single-machine one-step double-layer thermoforming equipment as described in claim 3, characterized in that, The lower traveling mechanism of the lower transfer mechanism (5) has the same structure as the upper traveling mechanism of the upper transfer mechanism (2).

5. The single-machine one-step double-layer thermoforming equipment as described in claim 3, characterized in that, When the four long rods of the upper bracket (281) form a rectangular structure, each long rod has an extension section (2810). By changing the length of the extension section (2810), the size of the rectangular structure can be changed.

6. A single-machine one-step double-layer thermoforming processing equipment as described in any one of claims 3-5, characterized in that, A reinforcing component conveying mechanism (7) is installed near the upper guide rail (41) and the lower guide rail (51). The upper transfer mechanism (2) is fixed with a reinforcing component placement mechanism. The reinforcing component conveying mechanism (7) can send the reinforcing component (76) from outside the processing equipment into the processing equipment. The reinforcing component placement mechanism can clamp the reinforcing component (76) from the reinforcing component conveying mechanism (7).

7. The single-machine one-step double-layer thermoforming equipment as described in claim 6, characterized in that, The reinforcing member (76) includes: Square tubes, round tubes, square rods and / or round rods.

8. The single-machine one-step double-layer thermoforming equipment as described in claim 7, characterized in that, The aforementioned reinforcing member conveying mechanism (7) includes: Conveyor frame (71); Two conveyor rails (73) are provided, and the two conveyor rails (73) are fixed parallel to each other on the conveyor frame (71); The conveying slider (74) is configured in multiple ways on each conveying guide rail (73), and the conveying slider (74) can only move along the length of the conveying guide rail (73); The worktable (75) is positioned to hold a reinforcing member (76) for processing double-layer thermoformed products, and the conveying slider (74) is fixed below the worktable (75). The conveying cylinder (72) has its cylinder body fixed to the bottom surface of the worktable (75), and the piston rod of the conveying cylinder (72) is fixed to the conveyor frame (71); When the piston rod of the delivery cylinder (72) extends, the worktable (75) moves outward, and a person or a robot can place the reinforcing member (76) at a predetermined position on the worktable (75). The aforementioned reinforcing member placement mechanism includes: Placement rack (77); Placement cylinders are provided in multiple units. The cylinder body of the placement cylinder is fixed to the upper transfer bracket (20), and the piston rod of the placement cylinder is fixed to the placement frame (77). Clamping cylinders (78), two or more are configured for each reinforcing member (76). The cylinder body of the clamping cylinder (78) is fixed to the placement frame (77). The manipulator of the clamping cylinder (78) can clamp the reinforcing member (76). When the reinforcing component placement mechanism is located above the reinforcing component conveying mechanism (7) and the piston rod of the placement cylinder extends, it drives the clamping cylinder (78) to move downward, and the manipulator of the clamping cylinder (78) can clamp the reinforcing component (76) at a predetermined position in the reinforcing component conveying mechanism (7). After the lower conveyor belt (60) of the current conveyor device (6) delivers the lower plastic sheet to the lower mold (82) of the mold closing device (8) and exits the mold closing device (8), the robotic arm of the clamping cylinder (78) can place the reinforcing member (76) on the lower plastic sheet.

9. A single-machine one-step double-layer thermoforming processing equipment as described in any one of claims 1-5, characterized in that, The aforementioned double-layer thermoforming product includes: Double-layer blister trays, lids of collapsible boxes, bottoms of collapsible boxes, collapsible box panels, reusable packaging boards, or automotive air ducts.

10. A single-machine, one-step, double-layer thermoforming processing kit, characterized in that, The equipment includes two sets of single-machine one-step double-layer thermoforming equipment as described in any one of claims 1-9, and also includes a bidirectional fork receiving mechanism (9). The two sets of single-machine one-step double-layer thermoforming equipment are arranged side by side, and the bidirectional fork receiving mechanism (9) is placed between the two mold closing devices (8). The bidirectional fork receiving mechanism (9) can alternately receive the double-layer thermoformed products demolded from the mold closing device (8) by manual labor or a robotic arm. The bidirectional fork receiving mechanism (9) includes: Material receiving rack (92); The receiving guide rail (95) has two rails, which are fixed parallel to each other on the receiving frame (92); The receiving slider is configured with two or more on each receiving guide rail (95), and the receiving slider can only slide along the receiving guide rail (95); Two or more threaded blocks (93) are provided for each threaded guide rail (95); The threaded rod (94) is rotatably fixed at both ends to the receiving rack (92) by brackets; The receiving platform (91) has the receiving threaded block (93) and receiving slider fixed on its bottom surface; The receiving motor has its housing fixed to the receiving frame (92), and its rotating shaft is linked to the threaded rod (94); The receiving motor can control the receiving platform (91) to move toward either of the two mold closing devices (8) by rotating forward or backward.

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