A rapid heating device of a thick sheet blister machine
Through the coordinated design of heating, insulation, and protection devices, the problems of uneven heating and high energy consumption in thick sheet vacuum forming machines have been solved, achieving rapid and uniform heating and equipment protection, thereby improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANCHENG HANYANG TECH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-24
AI Technical Summary
Existing thick sheet vacuum forming machines have problems such as uneven heating, high energy consumption, and easy equipment damage. This is especially true when processing large-sized or thick-walled products, which leads to longer forming cycles and poor product quality.
The system employs a synergistic design of heating, insulation, and protection devices. It achieves rapid and uniform heating, precise temperature control, and equipment protection through a blower, a stirring rod to agitate the hot air, a circulating hot water system and a temperature converter for precise temperature control, and a spring buffer plate to cushion impact.
It improves the heating efficiency and product quality of thick sheet vacuum forming machines, reduces energy consumption and maintenance costs, ensures production stability and precision, and reduces product warping, shrinkage marks, and uneven thickness.
Smart Images
Figure CN224545300U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vacuum forming machine technology, specifically to a rapid heating device for a thick sheet vacuum forming machine. Background Technology
[0002] Thick-sheet vacuum forming requires heating to soften and shape the plastic sheet. Traditional heating devices often rely on electric heating plates or steam, which suffer from slow heating rates and uneven heating of the sheet. Especially when processing large-sized or thick-walled products, the significant temperature difference between the mold cavity edge and center can easily lead to prolonged forming cycles, large deviations in product wall thickness, and surface defects. While simply increasing the heating power can shorten the time in existing technologies, it exacerbates energy consumption and the risk of sheet overheating; while zoned temperature control solutions are complex and costly. Furthermore, conventional heating systems lack effective utilization of radiative heat dissipation, resulting in significant heat loss and further reducing energy efficiency. Therefore, there is an urgent need for a high-efficiency, uniform, and low-energy-consumption rapid heating device to improve the efficiency and product quality of thick-sheet vacuum forming.
[0003] Chinese patent document CN214354119U discloses a rapid heating device for a thick sheet vacuum forming machine. It includes a worktable with multiple support legs evenly fixed to its bottom. An operating frame and a work rack are fixedly mounted on the top of the worktable, with the work rack located within the operating frame. Slide grooves are formed on the left and right inner sidewalls of the operating frame. A heating device is installed at the top of the operating frame. A hydraulic cylinder is installed inside the work rack and fixedly connected to the top of the worktable. A hydraulic rod is connected to the output end of the hydraulic cylinder, and a model plate is fixedly connected to the top of the hydraulic rod. The model plate matches the inner cavity of the worktable. A module is installed at the top of the model plate, and multiple through holes are evenly arranged on both sides of the model plate away from the module. A vacuum forming device is installed at the bottom of the worktable. By activating the hydraulic cylinder, the hydraulic rod drives the model plate inside the worktable to rise, causing the module to compress and heat-soften the plastic sheet into shape.
[0004] Although the device described in the aforementioned literature can heat, its structure is relatively simple, the heating effect of the heating components is not uniform enough, which affects the working efficiency of the device. Furthermore, it lacks protection, and the structure of the device is easily damaged and aged, which reduces the practical value of the device. Utility Model Content
[0005] The main purpose of this invention is to provide a rapid heating device for a thick sheet vacuum forming machine, which can effectively solve the above-mentioned problems.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A rapid heating device for a thick sheet vacuum forming machine includes a worktable, a material trough is provided in the middle of the upper end of the worktable, a heating device is fixedly connected to the upper end of the worktable, a heat preservation device is fixedly connected to the rear end of the worktable, and a protective device is fixedly connected to the upper end of the worktable.
[0008] The heating device includes an electric telescopic rod, and a heating box is fixedly connected to the lower end of the electric telescopic rod;
[0009] The heat preservation device includes a fixing plate, the front end of which is fixedly connected to the rear end of the workbench;
[0010] The protective device includes a fixed frame, the lower end of which is fixedly connected to the upper end of the workbench.
[0011] Preferably, a controller is fixedly connected to the front end of the workbench, and a fixed frame is fixedly connected to the upper end of the workbench.
[0012] Preferably, air ducts are fixedly connected to both sides of the heating box, a heater is fixedly connected to the upper end of the air ducts, and a filter is fixedly connected to the inlet of the heater.
[0013] Preferably, a flow guide component is fixedly connected to one side of the heating box, and a pressure plate is fixedly connected to the lower end of the heating box.
[0014] Preferably, the flow guiding component includes a first motor, the fixed end of the first motor is fixedly connected to one side of the heating box, the output end of the first motor is fixedly connected to a drive wheel, and driven wheels are drivenly connected to both sides of the drive wheel.
[0015] Preferably, a rotating rod is fixedly connected to the lower end of the driven wheel, a stirring rod is fixedly connected to one side of the driven wheel, and a synchronous belt is provided between the driving wheel and the driven wheel.
[0016] Preferably, a temperature converter is fixedly connected to the upper right side of the fixed plate, a temperature sensor is fixedly connected to one side of the temperature converter, a pump is fixedly connected to the left side of the temperature converter, an output pipe is fixedly connected to the output port of the pump, a circulation pipe is fixedly connected to one end of the output pipe, and an input pipe is fixedly connected to one end of the circulation pipe.
[0017] Preferably, a telescopic cylinder is fixedly connected to the upper end of the device fixing frame, a spring is slidably connected to the inner wall of the telescopic cylinder, a pressure rod is fixedly connected to the upper end of the spring, a buffer plate is fixedly connected to the upper end of the pressure rod, and a buffer pad is fixedly connected to the upper end of the buffer plate.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] This invention provides a rapid heating device for a thick sheet vacuum forming machine. The device, equipped with a heating system, utilizes a synergistic design of a blower and a stirring rod to achieve "rapid, uniform, and stable" high-efficiency heating. This not only improves product molding quality and production efficiency but also reduces equipment maintenance costs and energy consumption. The stirring rod continuously agitates the hot air within the heating chamber, breaking up airflow stratification and stagnant areas, ensuring that hot air evenly covers the surface of the pressure plate, avoiding localized overheating or underheating, thus guaranteeing consistent heating of the plastic sheet. Uniform heating prevents uneven softening of the sheet due to temperature differences, reducing warping, shrinkage, or residual stress in the molded product, which is especially crucial for the molding quality of thick sheets or composite laminates. The extension and retraction of the electric telescopic rod causes the pressure plate to automatically rise and fall. Blower air is delivered through the blower and duct to the heating chamber to heat the pressure plate. Additionally, a first motor drives the drive wheel to rotate, causing the driven wheel connected via a synchronous belt to rotate as well, resulting in the rotation of the stirring rod connected to the rotating rod. This, in turn, drives the flow of hot air within the heating chamber, further enhancing heating efficiency.
[0020] This invention provides a rapid heating device for a thick-sheet vacuum forming machine. The device is equipped with a heat preservation system. Through the coordinated design of the heat preservation system, circulating hot water system, and temperature converter, the thick-sheet vacuum forming machine achieves a closed-loop optimization of "high-efficiency heating - precise temperature control - rapid cooling." This not only improves product quality and production efficiency but also reduces energy consumption and maintenance costs, while enhancing process adaptability and environmental friendliness. The heat preservation system prevents heat loss by isolating the external environment, reducing energy consumption during the heating stage. Especially during high-temperature molding, the heat preservation layer maintains heat concentration in the material tank, reducing the need for repeated heating. The circulating hot water directly contacts the material tank through circulation pipes, utilizing the high specific heat capacity of water to rapidly transfer heat and shorten the temperature rise time of the plastic sheet. The design of the circulating pipes ensures that hot water flows evenly through all areas of the material tank, and the temperature is precisely controlled by the temperature controller to avoid uneven softening of the sheets caused by uneven temperature. This reduces problems such as warping, shrinkage, or uneven thickness of the finished product. By adjusting the temperature of the circulating water, the equipment can quickly complete the cooling and shaping process after heating, shortening the molding cycle and improving efficiency. For example, after high-temperature heating, low-temperature water is immediately introduced for cooling to accelerate curing. The temperature controller adjusts the temperature of the water in the pipes. However, when it is necessary to heat the material, the water is heated. The water is pumped out from the output pipe and circulated through the circulating pipe, and then returned from the input pipe to form a circulation system that transfers heat and slows down the heat loss from the material tank. Conversely, lowering the water temperature after vacuum forming can promote heat dissipation from the material tank, allowing the material to solidify quickly.
[0021] This utility model provides a rapid heating device for a thick sheet vacuum forming machine. The device is equipped with a protective device, and its spring-loaded buffer plate design softens the contact process of the pressure plate, achieving multiple goals: equipment protection, improved precision, and enhanced safety and efficiency. Its core value lies in converting mechanical impact into controllable elastic potential energy, ensuring the stability of high-speed thick sheet vacuum forming production while reducing long-term maintenance costs. The spring-loaded buffer plate absorbs the kinetic energy of the pressure plate's descent through elastic deformation, preventing direct rigid collision between the pressure plate and the base, significantly reducing wear and deformation risks on the contact surface, and extending the service life of key components. The buffer device effectively absorbs impact energy, preventing violent vibrations at the moment the pressure plate contacts the bottom, maintaining overall equipment stability, preventing mold displacement or positioning deviations, and ensuring forming accuracy. During rapid heating, the material and mold may experience thermal expansion due to temperature differences; the buffer device reduces additional stress caused by impact, lowering the risk of cracking due to thermal fatigue of the mold or heating plate. The fixed frame provides some shielding, further slowing heat loss. The spring's extension and contraction allow the buffer plate to move, thus buffering the impact force. A buffer pad is installed at the upper end of the buffer plate to enhance the equipment's cushioning effect. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the heating device structure of this utility model;
[0024] Figure 3 This is a schematic diagram of the flow guiding component in the heating device of this utility model;
[0025] Figure 4 This is a schematic diagram of the thermal insulation device of this utility model;
[0026] Figure 5 This is a schematic diagram of the protective device structure of this utility model.
[0027] In the diagram: 1. Workbench; 2. Material trough; 3. Heating device; 31. Electric telescopic rod; 32. Heating box; 33. Warm air blower; 34. Air duct; 35. Flow guiding component; 351. First motor; 352. Drive wheel; 353. Driven wheel; 354. Rotating rod; 355. Stirring rod; 356. Synchronous pulley belt; 36. Pressure plate; 4. Insulation device; 41. Fixing plate; 42. Temperature converter; 43. Temperature sensor; 44. Pump; 45. Output pipe; 46. Circulation pipe; 47. Input pipe; 5. Protective device; 51. Fixing frame; 52. Telescopic cylinder; 53. Spring; 54. Pressure rod; 55. Buffer plate; 56. Buffer pad. Detailed Implementation
[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0029] like Figure 1As shown, a rapid heating device for a thick sheet vacuum forming machine includes a worktable 1. A material trough 2 is located in the middle of the upper end of the worktable 1. A heating device 3 is fixedly connected to the upper end of the worktable 1. Utilizing this device, through the synergistic design of a blower and a stirring rod, the thick sheet vacuum forming machine achieves "rapid, uniform, and stable" high-efficiency heating. This not only improves product molding quality and production efficiency but also reduces equipment maintenance costs and energy consumption. The stirring rod continuously agitates the hot air inside the heating chamber, breaking up airflow stratification and stagnant areas, ensuring that hot air evenly covers the surface of the pressure plate, avoiding localized overheating or underheating, thus ensuring consistent heating of the plastic sheet. Uniform heating prevents uneven softening of the sheet due to temperature differences, reducing warping, shrinkage marks, or residual stress in the molded product, which is especially crucial for the molding quality of thick sheets or composite laminated materials. A heat preservation device 4 is fixedly connected to the rear end of the worktable 1. Utilizing this device, through the synergistic design of the heat preservation device, circulating hot water system, and temperature converter, the thick sheet vacuum forming machine achieves closed-loop optimization of "high-efficiency heating - precise temperature control - rapid cooling," not only improving product molding quality and production efficiency but also reducing equipment maintenance costs and energy consumption. The stirring rod continuously agitates the hot air inside the heating chamber, breaking down airflow stratification and stagnant areas, ensuring that hot air evenly covers the surface of the pressure plate, avoiding localized overheating or underheating, thus ensuring consistent heating of the plastic sheet. Uniform heating prevents uneven softening of the sheet due to temperature differences, reducing warping, shrinkage, or residual stress in the molded product, which is particularly important for the molding quality of thick sheets or composite laminated materials. A heat preservation device 4 is fixedly connected to the rear end of the worktable 1. This device, through the synergistic design of the heat preservation device, circulating hot water system, and temperature converter, achieves closed-loop optimization of It improves product quality and production efficiency, reduces energy consumption and maintenance costs, and enhances process adaptability and environmental friendliness. The insulation device prevents heat loss by isolating the external environment, reducing energy consumption during the heating stage. Especially during high-temperature molding, the insulation layer can maintain heat concentration in the material tank, reducing the need for repeated heating. Circulating hot water directly contacts the material tank through the circulation pipe, utilizing the high specific heat capacity of water to quickly transfer heat, shortening the heating time of plastic sheets and improving production rhythm. The circulation pipe design ensures that hot water flows evenly through all areas of the material tank, and the temperature is precisely controlled by the temperature controller to avoid differences in sheet softening caused by uneven temperature, reducing problems such as warping, shrinkage, or uneven thickness of finished products. By adjusting the circulating water temperature, the equipment can quickly complete the cooling and shaping after heating, shortening the molding cycle and improving efficiency. For example, after high-temperature heating, low-temperature water is immediately introduced for cooling to accelerate curing. The upper end of the workbench 1 is fixedly connected to a protective device 5. Using this device, the spring buffer plate design softens the bottom contact process of the pressure plate, achieving multiple goals of equipment protection, precision improvement, safety enhancement, and efficiency improvement. Its core value lies in converting mechanical impact into controllable elastic potential energy, which not only ensures the stability of high-speed production of thick sheet thermoforming, but also reduces long-term operation and maintenance costs. The spring buffer plate absorbs the kinetic energy of the pressure plate when it descends through elastic deformation, avoiding direct rigid collision between the pressure plate and the base, significantly reducing the risk of wear and deformation of the contact surface, and extending the service life of key components. The buffer device effectively absorbs impact energy, avoids violent vibration at the moment the pressure plate touches the bottom, maintains the overall stability of the equipment, prevents mold displacement or positioning deviation, and ensures molding accuracy. During rapid heating, the material and mold may undergo thermal expansion due to temperature difference. The buffer device can reduce the additional stress caused by impact and reduce the risk of cracking of the mold or heating plate due to thermal fatigue.
[0030] The heating device 3 includes an electric telescopic rod 31, and a heating box 32 is fixedly connected to the lower end of the electric telescopic rod 31.
[0031] The heat preservation device 4 includes a fixing plate 41, the front end of which is fixedly connected to the rear end of the workbench 1.
[0032] The protective device 5 includes a fixing frame 51, the lower end of which is fixedly connected to the upper end of the workbench 1.
[0033] A controller is fixedly connected to the front end of the workbench 1, and a fixed frame is fixedly connected to the upper end of the workbench 1.
[0034] like Figure 2 As shown, air ducts 34 are fixedly connected to both sides of the heating box 32. A heater 33 is fixedly connected to the upper end of the air ducts 34. A filter screen is fixedly connected to the inlet of the heater 33. A guide component 35 is fixedly connected to one side of the heating box 32. A pressure plate 36 is fixedly connected to the lower end of the heating box 32. The pressure plate 36 is automatically raised and lowered by the extension and retraction of the electric telescopic rod 31. The heater 33 blows air through the air ducts 34 to heat the pressure plate 36 inside the heating box 32. In addition, the first motor 351 drives the drive wheel 352 to rotate, causing the driven wheel 353 connected to the synchronous pulley belt 356 to rotate as well. This causes the stirring rod 355 connected to the rotating rod 354 to rotate together, thereby driving the hot air to flow inside the heating box 32 and improving the heating efficiency.
[0035] like Figure 3 As shown, the flow guiding component 35 includes a first motor 351. The fixed end of the first motor 351 is fixedly connected to one side of the heating box 32. The output end of the first motor 351 is fixedly connected to a drive wheel 352. Driven wheels 353 are drivenly connected to both sides of the drive wheel 352. A rotating rod 354 is fixedly connected to the lower end of the driven wheel 353. A stirring rod 355 is fixedly connected to one side of the driven wheel 353. A synchronous belt 356 is provided between the drive wheel 352 and the driven wheel 353.
[0036] like Figure 4 As shown, a temperature converter 42 is fixedly connected to the upper right side of the fixed plate 41. A temperature sensor 43 is fixedly connected to one side of the temperature converter 42. A pump 44 is fixedly connected to the left side of the temperature converter 42. An output pipe 45 is fixedly connected to the output port of the pump 44. A circulation pipe 46 is fixedly connected to one end of the output pipe 45. An input pipe 47 is fixedly connected to one end of the circulation pipe 46. The temperature converter 42 adjusts the temperature of the water in the pipe. When it is necessary to heat the material, the water is heated. The pump 44 outputs the water from the output pipe 45 and circulates it through the circulation pipe 46. The water is then returned from the input pipe 47 to form a circulation system, which transfers heat and slows down the heat loss of the material tank 2. Conversely, after thermoforming, the water temperature is lowered, which can promote heat dissipation of the material tank 2 and make the material solidify quickly.
[0037] like Figure 5As shown, a telescopic cylinder 52 is fixedly connected to the upper end of the device mounting bracket 51. A spring 53 is slidably connected to the inner wall of the telescopic cylinder 52. A pressure rod 54 is fixedly connected to the upper end of the spring 53. A buffer plate 55 is fixedly connected to the upper end of the pressure rod 54. A buffer pad 56 is fixedly connected to the upper end of the buffer plate 55. The mounting bracket 51 provides a certain degree of shielding, further reducing heat loss. The extension and retraction of the spring 53 allows the buffer plate 55 to move, thereby buffering the impact force. The buffer pad 56 is provided at the upper end of the buffer plate 55, which can improve the buffering effect of the equipment.
[0038] The working principle of this utility model is as follows: The heating device 3, via the extension and retraction of the electric telescopic rod 31, causes the pressure plate 36 to automatically rise and fall. A blower 33 blows air through the air duct 34 to the heating chamber 32 to heat the pressure plate 36. Additionally, the first motor 351 drives the drive wheel 352 to rotate, causing the driven wheel 353, connected via a synchronous pulley 356, to rotate as well. This causes the stirring rod 355, connected to the rotating rod 354, to rotate, thereby driving the flow of hot air within the heating chamber 32 and improving heating efficiency. The insulation device 4, with a temperature converter 42, adjusts the temperature of the water in the pipes, but requires… When heating the material, water is heated. The water is pumped from the output pipe 45 through the pump 44 and circulated through the circulation pipe 46. It is then returned from the input pipe 47 to form a circulation system, which transfers heat and slows down the heat loss of the material tank 2. Conversely, after thermoforming, the water temperature is lowered, which can promote heat dissipation in the material tank 2 and make the material solidify quickly. The protective device 5 and the fixing frame 51 provide a certain degree of shielding to further slow down the heat loss. The extension and retraction of the spring 53 allows the buffer plate 55 to move, thereby buffering the impact force. The upper end of the buffer plate 55 is equipped with a buffer pad 56, which can improve the buffering effect of the equipment.
[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A rapid heating device for a thick sheet vacuum forming machine, comprising a worktable (1), characterized in that: The upper middle part of the workbench (1) is provided with a material trough (2), the upper end of the workbench (1) is fixedly connected with a heating device (3), the rear end of the workbench (1) is fixedly connected with a heat preservation device (4), and the upper end of the workbench (1) is fixedly connected with a protective device (5). The heating device (3) includes an electric telescopic rod (31), and a heating box (32) is fixedly connected to the lower end of the electric telescopic rod (31). The heat preservation device (4) includes a fixing plate (41), the front end of which is fixedly connected to the rear end of the workbench (1). The protective device (5) includes a fixing frame (51), the lower end of which is fixedly connected to the upper end of the workbench (1).
2. The rapid heating device for a thick sheet vacuum forming machine according to claim 1, characterized in that: The front end of the workbench (1) is fixedly connected to a controller, and the upper end of the workbench (1) is fixedly connected to a frame.
3. The rapid heating device for a thick sheet vacuum forming machine according to claim 1, characterized in that: The heating box (32) is fixedly connected to air ducts (34) on both sides, and a heater (33) is fixedly connected to the upper end of the air ducts (34). A filter screen is fixedly connected to the inlet of the heater (33).
4. The rapid heating device for a thick sheet vacuum forming machine according to claim 3, characterized in that: A flow guide component (35) is fixedly connected to one side of the heating box (32), and a pressure plate (36) is fixedly connected to the lower end of the heating box (32).
5. The rapid heating device for a thick sheet vacuum forming machine according to claim 4, characterized in that: The flow guiding component (35) includes a first motor (351), the fixed end of the first motor (351) is fixedly connected to one side of the heating box (32), the output end of the first motor (351) is fixedly connected to a drive wheel (352), and the two sides of the drive wheel (352) are connected to driven wheels (353).
6. The rapid heating device for a thick sheet vacuum forming machine according to claim 5, characterized in that: The driven wheel (353) is fixedly connected to a rotating rod (354) at its lower end, and a stirring rod (355) is fixedly connected to one side of the driven wheel (353). A synchronous belt (356) is provided between the driving wheel (352) and the driven wheel (353).
7. The rapid heating device for a thick sheet vacuum forming machine according to claim 1, characterized in that: A temperature converter (42) is fixedly connected to the upper right side of the fixed plate (41). A temperature sensor (43) is fixedly connected to one side of the temperature converter (42). A pump (44) is fixedly connected to the left side of the temperature converter (42). An output pipe (45) is fixedly connected to the output port of the pump (44). A circulation pipe (46) is fixedly connected to one end of the output pipe (45). An input pipe (47) is fixedly connected to one end of the circulation pipe (46).
8. The rapid heating device for a thick sheet vacuum forming machine according to claim 1, characterized in that: A telescopic cylinder (52) is fixedly connected to the upper end of the device fixing frame (51). A spring (53) is slidably connected to the inner wall of the telescopic cylinder (52). A pressure rod (54) is fixedly connected to the upper end of the spring (53). A buffer plate (55) is fixedly connected to the upper end of the pressure rod (54). A buffer pad (56) is fixedly connected to the upper end of the buffer plate (55).