Blister forming apparatus for tray production

Abstract

The utility model discloses a blister forming equipment for tray production relates to blister forming equipment technical field, the utility model discloses a work table, one side of work table top is provided with the fixing frame, the top of fixed frame inner chamber is provided with the upper die assembly, one side of work table surface is provided with the lower die assembly, and the bottom fixed connection of work table has the support frame, and the upper die assembly includes first electric push rod, and the telescopic axle fixed connection of first electric push rod has the connecting frame. The utility model effectively solves the problem of the traditional equipment natural cooling effect is not ideal, and the plastic tray is covered after forming the surface of the mould in the traditional mode, and the heat exchange is hindered to cause the slow cooling, and the utility model passes through the double cooling mechanism, and the air after cooling is sent into the upper die plate inner chamber to the blister part cooling through the fan, and the cooling liquid in the cooling liquid runner is used for cooling the lower die plate die cavity, and the heat dissipation speed is greatly accelerated, and the cooling efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum forming equipment, and in particular relates to a vacuum forming equipment for pallet production. Background Technology

[0002] Pallets are widely used in logistics, warehousing, food packaging, electronic component packaging and other industries, and the thermoforming process in their production is crucial.

[0003] A Chinese patent application with publication number 202222058841.0 discloses a thermoforming equipment for pallet production, including a base, a protective cover, a purification box, an exhaust fan, and a connecting pipe. The protective cover is set on the top of the base, the purification box is fixedly connected to the left side of the base, the exhaust fan is set on the top of the purification box, and the connecting pipe is fixedly connected to the input end of the exhaust fan. This utility model solves the problem of poor air circulation inside the closed protective cover, which leads to poor exhaust effect of the exhaust fan and difficulty in completely sucking out the gas inside the protective cover by setting a filter mechanism and filter screen in conjunction with a semiconductor cooling plate and purification liquid.

[0004] Although the patent improves the contact effect between the purification liquid and the gas, it still has the problem of unsatisfactory cooling effect. In actual production, after the plastic tray is thermoformed, it mostly relies on natural cooling to set its shape. Under natural cooling, the plastic tray will cover the mold surface after forming, which hinders the heat exchange between the mold and the outside air, resulting in slow heat dissipation and extremely slow cooling speed.

[0005] To address these issues, we provide a thermoforming device for pallet production. Utility Model Content

[0006] The purpose of this utility model is to provide a thermoforming equipment for pallet production. By cooperating with the upper mold assembly and the lower mold assembly, it solves the problem that most thermoforming equipment for pallet production in the prior art relies on natural cooling, resulting in unsatisfactory cooling effect.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a thermoforming equipment for pallet production, comprising a workbench, a fixed frame on one side of the top of the workbench, an upper mold assembly on the top of the inner cavity of the fixed frame, a lower mold assembly on one side of the surface of the workbench, a support frame fixedly connected to the bottom of the workbench, the upper mold assembly including a first electric push rod, a connecting frame fixedly connected to the telescopic shaft of the first electric push rod, an upper template fixedly connected to the bottom of the connecting frame, a motor on the top of the upper template, the output shaft of the motor passing through the inner cavity of the upper template and fixedly connected to a turntable, through holes on the surfaces of the upper template and the turntable, ventilation shells fixedly connected to both sides of the top of the upper template, a cooling shell fixedly connected to the rear side of the top of the upper template, a fan on the top of the cooling shell, and both sides of the cooling shell communicating with the back of the ventilation shell through connecting pipes.

[0009] The present invention is further configured such that the lower mold assembly includes a second electric push rod, the bottom of which is fixedly connected to the bottom of the inner cavity of the support frame, the telescopic shaft of which is fixedly connected to a lifting frame, the top of which is fixedly connected to a lower template, a vacuum pump is provided on one side of the bottom of the lower template, and a coolant channel is provided inside the lower template. When the second electric push rod is turned on, the telescopic shaft of the second electric push rod drives the lifting frame to move upward, and the lifting frame drives the lower template to move upward to a designated position above the worktable. When the vacuum pump is turned on, the vacuum pump creates a negative pressure in the vacuum hole of the upper template cavity, which draws the softened plastic sheet into the inner cavity of the lower template. Coolant can be injected into the coolant channel. The coolant flowing in the coolant channel surrounding the lower template will reduce the temperature of the inner cavity of the lower template and accelerate the forming of the tray.

[0010] The present invention is further configured such that a heating shell is fixedly connected to one side of the top of the workbench, and infrared heating tubes are provided at the top and bottom of the inner cavity of the heating shell. When the plastic sheet passes through the heating shell, the infrared heating tubes in the inner cavity of the heating shell emit strong infrared heat radiation, and the plastic sheet is softened after staying in the heating shell for a preset heating time.

[0011] The present invention is further configured such that limiting rods are fixedly connected to both sides of the top of the connecting frame, the limiting rods extending through to the top of the fixed frame, and the limiting rods move with the connecting frame in the limiting holes on the surface of the fixed frame. The limiting action of the limiting rods can improve the movement stability of the connecting frame.

[0012] The present invention is further configured such that pads are fixedly connected to both sides of the top of the workbench, and movable rollers are provided on the top of the pads. The support structure composed of the pads and the movable rollers can support the plastic sheet, so that the plastic sheet can move smoothly on the top of the workbench.

[0013] The present invention is further configured such that a vertical plate is fixedly connected to the bottom of the inner cavity of the support frame, and a slider is movably connected to the inner cavity of the vertical plate. One side of the slider is fixedly connected to the surface of the lifting frame. The slider moves with the lifting frame in the inner cavity of the vertical plate. The limiting structure formed by the slider and the sliding groove on one side of the vertical plate can improve the movement stability of the lifting frame.

[0014] The present invention is further configured such that a sealing gasket is fixedly connected to the top of the turntable, the top of the sealing gasket is in contact with the inner wall of the upper template, and the sealing gasket blocks the through hole on the surface of the upper template as the turntable rotates, which can improve the sealing between the turntable and the top of the inner cavity of the upper template.

[0015] The present invention is further configured such that an injection pipe is provided on the front side of the bottom of the lower template and a drain pipe is provided on the rear side of the bottom of the lower template. Coolant can be injected into the coolant channel through the injection pipe and discharged from the drain pipe after flowing through the coolant channel.

[0016] The present invention has the following beneficial effects.

[0017] 1. This utility model effectively solves the problem of unsatisfactory natural cooling effect of traditional equipment. In the traditional method, the plastic tray covers the mold surface after molding, which hinders heat exchange and causes slow cooling. However, this utility model uses a dual cooling mechanism, which uses a fan to send cooled air into the upper mold cavity to cool the thermoformed part, and uses coolant in the coolant channel to cool the lower mold cavity, which greatly accelerates the heat dissipation speed and improves the cooling efficiency.

[0018] 2. This utility model significantly improves the overall efficiency and quality of tray thermoforming. From the precise feeding of plastic sheets and the tight fixing of the edges, to the rapid forming with the help of negative pressure, and then to the accelerated setting with double cooling, each link is smoothly connected. This not only ensures the precise fit of the tray shape, but also improves production efficiency by shortening the forming time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a perspective view of a thermoforming equipment for pallet production.

[0021] Figure 2 This is a schematic diagram of the upper mold assembly in a thermoforming equipment for pallet production.

[0022] Figure 3 This is a bottom view schematic diagram of a thermoforming equipment for pallet production.

[0023] Figure 4This is a partial cross-sectional schematic diagram of a thermoforming equipment for pallet production.

[0024] Figure 5 A thermoforming equipment for pallet production Figure 4 A partially enlarged schematic diagram of point A. In the attached diagram: 1. Workbench; 2. Fixing frame; 3. Upper mold assembly; 4. Lower mold assembly; 5. Support frame; 301. First electric push rod; 302. Connecting frame; 303. Upper template; 304. Motor; 305. Turntable; 306. Through hole; 307. Ventilation shell; 308. Cooling shell; 309. Fan; 401. Second electric push rod; 402. Lifting frame; 403. Lower template; 404. Vacuum pump; 405. Coolant flow channel; 6. Heating shell; 7. Injection pipe; 8. Drain pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Please see Figure 1-5 This utility model relates to a thermoforming equipment for pallet production, comprising a workbench 1, a fixed frame 2 on one side of the top of the workbench 1, an upper mold assembly 3 on the top of the inner cavity of the fixed frame 2, a lower mold assembly 4 on one side of the surface of the workbench 1, and a support frame 5 fixedly connected to the bottom of the workbench 1. The upper mold assembly 3 includes a first electric push rod 301, a connecting frame 302 fixedly connected to the telescopic shaft of the first electric push rod 301, and an upper template 303 fixedly connected to the bottom of the connecting frame 302. A motor 304 is installed at the top of the upper template 303. The output shaft of the motor 304 passes through the inner cavity of the upper template 303 and is fixedly connected to a turntable 305. Both the upper template 303 and the turntable 305 have through holes 306. Ventilation shells 307 are fixedly connected to both sides of the top of the upper template 303. A cooling shell 308 is fixedly connected to the rear side of the top of the upper template 303. A fan 309 is installed at the top of the cooling shell 308. Both sides of the cooling shell 308 are connected to the back of the ventilation shell 307 through connecting pipes.

[0028] Specifically: The first electric push rod 301 is activated, and the telescopic shaft of the first electric push rod 301 drives the connecting frame 302 and the upper template 303 to move downward until the edge of the plastic sheet is tightly pressed onto the lower mold assembly 4, forming a sealed space. The plastic sheet is firmly fixed. After the vacuum forming process is completed, the motor 304 is activated, and the output shaft of the motor 304 drives the turntable 305 to rotate until the through hole 306 on the surface of the turntable 305 is aligned with the through hole 306 on the surface of the upper template 303. The fan 309 is activated, and the fan 309 draws external air into the inner cavity of the cooling shell 308. After the gas is cooled in the inner cavity of the cooling shell 308, it enters the inner cavity of the ventilation shell 307 through the connecting pipe. It then enters the inner cavity of the upper template 303 through the through hole 306 on the surface of the upper template 303 and the turntable 305 to quickly cool the tray vacuum forming part inside the lower mold assembly 4.

[0029] Example 2

[0030] Please see Figure 1-5 Based on Embodiment 1, the lower mold assembly 4 includes a second electric push rod 401. The bottom of the second electric push rod 401 is fixedly connected to the bottom of the inner cavity of the support frame 5. The telescopic shaft of the second electric push rod 401 is fixedly connected to a lifting frame 402. The top of the lifting frame 402 is fixedly connected to a lower mold plate 403. A vacuum pump 404 is provided on one side of the bottom of the lower mold plate 403. A coolant flow channel 405 is provided inside the lower mold plate 403. A heating shell 6 is fixedly connected to one side of the top of the worktable 1. Infrared heating tubes are provided at the top and bottom of the inner cavity of the heating shell 6. Limiting rods are fixedly connected to both sides of the top of the frame 302, and the limiting rods extend through to the top of the fixed frame 2. Pads are fixedly connected to both sides of the top of the worktable 1, and movable rollers are provided on the top of the pads. A vertical plate is fixedly connected to the bottom of the inner cavity of the support frame 5, and a slider is movably connected to the inner cavity of the vertical plate. One side of the slider is fixedly connected to the surface of the lifting frame 402. A sealing gasket is fixedly connected to the top of the turntable 305, and the top of the sealing gasket contacts the inner wall of the upper template 303. An injection pipe 7 is provided on the front side of the bottom of the lower template 403, and a drain pipe 8 is provided on the rear side of the bottom of the lower template 403.

[0031] Specifically: The second electric push rod 401 is activated, and its telescopic shaft drives the lifting frame 402 upward. The lifting frame 402 then moves the lower template 403 to a designated position above the worktable 1. The vacuum pump 404 is activated, creating negative pressure in the vacuum hole of the upper template 303 to draw the softened plastic sheet into the lower template 403. Coolant can be injected into the coolant channel 405. The coolant flowing through the coolant channel 405 surrounding the lower template 403 lowers the temperature of the lower template 403, accelerating tray forming. When the plastic sheet passes through the heating shell 6, the infrared heating tube inside the heating shell 6 emits strong infrared heat radiation. The plastic sheet softens after a preset heating time inside the heating shell 6, and the limiting rod follows... The connecting frame 302 moves in the limiting hole on the surface of the fixed frame 2. The limiting rod can improve the movement stability of the connecting frame 302. The support structure composed of the pad and the movable roller can support the plastic sheet, so that the plastic sheet can move smoothly on the top of the worktable 1. The slider moves in the inner cavity of the vertical plate with the lifting frame 402. The limiting structure composed of the slider and the sliding groove on one side of the vertical plate can improve the movement stability of the lifting frame 402. The sealing gasket blocks the through hole 306 on the surface of the upper template 303 as the turntable 305 rotates, which can improve the sealing between the turntable 305 and the top of the inner cavity of the upper template 303. Coolant can be injected into the coolant channel 405 through the injection pipe 7. After the coolant flows through the coolant channel 405, it is discharged from the drain pipe 8.

[0032] The working principle of this utility model is as follows: The plastic sheet is pulled out from the raw material rack and moves forward a predetermined length, which is just enough to cover the top of the lower mold plate 403, leaving the edge pressed by the upper mold plate 303. After passing through the heating shell 6, the plastic sheet is heated and softened. The heated plastic sheet is quickly and accurately fed into the molding area, covering the lower mold plate 403. The first electric push rod 301 is activated, and the telescopic shaft of the first electric push rod 301 drives the connecting frame 302 and the upper mold plate 303 to move downward until the edge of the plastic sheet is tightly pressed against the lower mold assembly 4, forming a sealed space. The plastic sheet is firmly fixed. Then, the vacuum pump 404 is activated. The vacuum pump 404 starts working and violently draws out the air in the vacuum hole of the lower mold plate 403 through the pipe inside the lower mold plate 403. A strong negative pressure is formed inside the lower mold plate 403. At this time, there is a huge pressure difference between the upper and lower surfaces of the plastic sheet: the upper surface is at normal atmospheric pressure, and the lower surface is under vacuum. The atmospheric pressure forcefully "presses" the softened plastic sheet into the lower mold. The recesses on the surface of plate 403 allow the plastic sheet to adhere tightly to the cavity surface of the lower template 403, instantly "suctioning" the plastic sheet into the shape of a tray. Then, motor 304 is turned on, and the output shaft of motor 304 drives turntable 305 to rotate until the through hole 306 on the surface of turntable 305 aligns with the through hole 306 on the surface of upper template 303. Fan 309 is then turned on, drawing outside air into the inner cavity of cooling shell 308. After being cooled in the inner cavity of cooling shell 308, the gas enters through the connecting pipe. The ventilation shell 307's inner cavity allows the coolant to enter through the through holes 306 on the surfaces of the upper mold plate 303 and the turntable 305, rapidly cooling the tray thermoforming part inside the lower mold assembly 4. Simultaneously, coolant is injected into the coolant channel 405 through the injection pipe 7. After flowing through the coolant channel 405, the coolant is discharged from the drain pipe 8. The coolant flowing in the coolant channel 405 can cool the mold cavity of the lower mold plate 403, thus improving the forming speed of the tray thermoforming part through dual cooling.

[0033] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A thermoforming equipment for pallet production, comprising a workbench (1), characterized in that: A fixed frame (2) is provided on one side of the top of the workbench (1), an upper mold assembly (3) is provided on the top of the inner cavity of the fixed frame (2), a lower mold assembly (4) is provided on one side of the surface of the workbench (1), and a support frame (5) is fixedly connected to the bottom of the workbench (1). The upper mold assembly (3) includes a first electric push rod (301), the telescopic shaft of the first electric push rod (301) is fixedly connected to a connecting frame (302), the bottom of the connecting frame (302) is fixedly connected to an upper template (303), the top of the upper template (303) is provided with a motor (304), the output shaft of the motor (304) passes through the inner cavity of the upper template (303) and is fixedly connected to a turntable (305), the surfaces of the upper template (303) and the turntable (305) are both provided with through holes (306), the two sides of the top of the upper template (303) are fixedly connected to ventilation shells (307), the rear side of the top of the upper template (303) is fixedly connected to a cooling shell (308), the top of the cooling shell (308) is provided with a fan (309), the two sides of the cooling shell (308) are connected to the back of the ventilation shell (307) through connecting pipes.

2. The thermoforming equipment for pallet production according to claim 1, characterized in that: The lower mold assembly (4) includes a second electric push rod (401), the bottom of which is fixedly connected to the bottom of the inner cavity of the support frame (5), the telescopic shaft of which is fixedly connected to a lifting frame (402), the top of which is fixedly connected to a lower template (403), a vacuum pump (404) is provided on one side of the bottom of the lower template (403), and a coolant flow channel (405) is provided inside the lower template (403).

3. The thermoforming equipment for pallet production according to claim 1, characterized in that: A heating shell (6) is fixedly connected to one side of the top of the workbench (1), and infrared heating tubes are provided at the top and bottom of the inner cavity of the heating shell (6).

4. The thermoforming equipment for pallet production according to claim 1, characterized in that: Limiting rods are fixedly connected to both sides of the top of the connecting frame (302), and the limiting rods extend through to the top of the fixed frame (2).

5. The thermoforming equipment for pallet production according to claim 1, characterized in that: The workbench (1) has pads fixedly connected to both sides of its top, and movable rollers are provided on the top of the pads.

6. The thermoforming equipment for pallet production according to claim 1, characterized in that: A vertical plate is fixedly connected to the bottom of the inner cavity of the support frame (5), and a slider is movably connected to the inner cavity of the vertical plate. One side of the slider is fixedly connected to the surface of the lifting frame (402).

7. The thermoforming equipment for pallet production according to claim 1, characterized in that: A sealing gasket is fixedly connected to the top of the turntable (305), and the top of the sealing gasket contacts the inner wall of the upper template (303).

8. The thermoforming equipment for pallet production according to claim 2, characterized in that: A liquid injection pipe (7) is provided on the front side of the bottom of the lower template (403), and a liquid drain pipe (8) is provided on the rear side of the bottom of the lower template (403).

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