CN113334740A - High-efficient thermoforming food storage box production line - Google Patents
High-efficient thermoforming food storage box production line Download PDFInfo
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- CN113334740A CN113334740A CN202110624962.4A CN202110624962A CN113334740A CN 113334740 A CN113334740 A CN 113334740A CN 202110624962 A CN202110624962 A CN 202110624962A CN 113334740 A CN113334740 A CN 113334740A
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- plastic film
- food storage
- storage box
- heat preservation
- production line
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000003856 thermoforming Methods 0.000 title claims description 17
- 239000002985 plastic film Substances 0.000 claims abstract description 73
- 229920006255 plastic film Polymers 0.000 claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000004033 plastic Substances 0.000 claims abstract description 22
- 238000000071 blow moulding Methods 0.000 claims abstract description 21
- 238000004321 preservation Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 8
- 230000002950 deficient Effects 0.000 abstract description 6
- 230000003028 elevating effect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/18—Thermoforming apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/261—Handling means, e.g. transfer means, feeding means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/46—Measuring, controlling or regulating
Abstract
The invention relates to the technical field of food storage box production, and provides a high-efficiency thermal forming food storage box production line which comprises a control system, a plastic coil conveying device, a plastic film heating and softening device, a thermal forming mold, a blow molding device and a pushing mechanism, wherein the plastic coil conveying device, the plastic film heating and softening device, the thermal forming mold, the blow molding device and the pushing mechanism are arranged on a rack, sucking disc transfer device, finished product conveyor and rim charge collection device, plastic film heat softening installation is including the storehouse that keeps warm, centre gripping conveying mechanism, a plurality of temperature sensor, a plurality of PTC heater, transformer with PTC heater quantity matching and a plurality of elevating system with PTC heater quantity matching, each PTC heater is respectively through each elevating system can go up and down to arrange the below that is located the plastic film that centre gripping conveying mechanism carried in locating the storehouse that keeps warm in the interval and heat the plastic film, each temperature sensor arranges with the array mode and locates and keep warm and detect the temperature in each region in the storehouse. The invention solves the problem of high defective rate of finished products produced by the existing food storage box production line.
Description
Technical Field
The invention relates to the technical field of food storage box production, in particular to a high-efficiency thermal forming food storage box production line.
Background
Various plastic products such as cups, dishes, food trays, toys, helmets, and automobile parts, architectural decorations, chemical equipment, etc. are visible or used in human life, and plastic processing includes injection molding and thermoforming, such as cups, dishes, food trays, toys, helmets, and automobile parts, architectural decorations, chemical equipment, etc. The plastic film softened in each cavity unit of the thermoforming mould is subjected to high-pressure blow molding by a blow molding device by using instantaneous high pressure, so that the heated plastic film expands and is molded in each cavity unit and cut into a plurality of single food storage box bodies or box covers, the air pressure is discharged from an exhaust hole of the thermoforming mould, then the plastic containers are cooled and demolded, and the finished products are stacked after the demolding and then are delivered to storage. However, in the production process, the heating softening of the plastic film is important, the plastic film is excessively softened in the middle or insufficiently softened at two sides, so that the effect is unsatisfactory when the plastic film is conveyed to a thermal forming die for blow molding, the plastic films of the products at two sides are insufficiently softened, so that the thickness of the box body or the box cover of the food storage box is uneven to become a defective product, or the middle of the box body or the box cover is excessively thin and easily damaged to become a defective product due to excessively high middle temperature.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides the high-efficiency thermal forming food storage box production line which is reasonable in structure, has a uniform and stable softening effect on the plastic film as a whole, greatly reduces the defective rate of finished products and improves the production benefits of enterprises.
In order to solve the technical problem, the invention adopts the following scheme: a high-efficiency thermal forming food storage box production line comprises a control system, a plastic roll conveying device, a plastic film heating and softening device, a thermal forming die, a blow molding device, a pushing mechanism, a sucker transfer device, a finished product conveying device and an edge material collecting device, wherein the plastic roll conveying device is arranged on a rack, the plastic roll conveying device conveys a plastic film to be heated and softened by the plastic film heating and softening device and then conveyed to a position between an upper die and a lower die of the thermal forming die, finally the plastic film is conveyed to the edge material collecting device to collect edge materials of the plastic film, the blow molding device performs high-pressure blow molding on each cavity in the thermal forming die after the thermal forming die is closed to enable the softened plastic film to be expanded and formed in each cavity unit, the pushing mechanism is connected with and drives the sucker transfer device to move on the rack to enable box bodies or box covers of each food storage box to be adsorbed and transferred to the finished product conveying device to be stacked, and the food storage boxes are demoulded after the thermal forming die are separated, the finished product conveying device sends out a preset stacking number of finished products to storage, the plastic film heating and softening device comprises a heat preservation bin, a clamping conveying mechanism, a plurality of temperature sensors, a plurality of PTC heaters, a transformer matched with the PTC heaters in number and a plurality of lifting mechanisms matched with the PTC heaters in number, the clamping conveying mechanism is arranged on two sides of the middle of the heat preservation bin along the horizontal direction, an inlet of the clamping conveying mechanism is connected with an output end of the plastic roll conveying device, two sides of the plastic film clamped by the clamping conveying mechanism are conveyed to a thermoforming mold, the PTC heaters are respectively arranged in the heat preservation bin in an up-and-down lifting adjusting mode at intervals to heat the plastic film under the plastic film conveyed by the clamping conveying mechanism, the temperature sensors are arranged in the heat preservation bin in an array mode to detect the temperature of each area in the heat preservation bin, each transformer is respectively connected with the power supply end of each PTC heater, and the plastic roll conveying device, the plastic film heating and softening device, the thermoforming mold, the blow molding device, the pushing mechanism, the sucker transfer device, the finished product conveying device and the rim charge collecting device are all connected and controlled by a control system.
Further, the control system is a PLC controller or a CNC controller.
Furthermore, each lifting mechanism comprises a group of cylinders or oil cylinders which are arranged at two ends of the bottom of the PTC heater and drive the PTC heater to lift up and down in the heat preservation bin.
Furthermore, the heat preservation cabin also comprises two second PTC heaters and two second transformers, wherein the two second PTC heaters are respectively arranged in the middle of the left part and the right part above the plastic film in the heat preservation cabin, and the two second transformers are respectively connected with power supply ends of the two second PTC heaters.
Furthermore, the sucking disc transfer device comprises a plurality of negative pressure sucking discs which are matched with the arrangement and the quantity of each cavity unit of the thermal forming die.
Further, the pushing mechanism comprises a driving unit and a fixing rod, the driving unit is an air cylinder or an oil cylinder, an output shaft of the driving unit is connected with one end of the fixing rod, and the other end of the fixing rod is connected with the sucker transfer device.
Furthermore, each temperature sensor is respectively arranged on the upper, lower, left and right surfaces in the heat preservation cabin in an array arrangement mode.
By adopting the technical scheme, the invention has the beneficial effects that: the automatic production of the food storage box is realized by arranging a plastic roll conveying device, a plastic film heating and softening device, a thermoforming mold, a sucker transfer device, a pushing mechanism, a finished product conveying device and an edge material collecting device into a production line in sequence, the plastic film heating and softening device is designed to be composed of a heat preservation cabin, a clamping conveying mechanism, a plurality of temperature sensors, a plurality of PTC heaters, a transformer matched with the PTC heaters in quantity and a plurality of lifting mechanisms matched with the PTC heaters in quantity, the PTC heaters are respectively arranged in the heat preservation cabin in an up-and-down lifting and adjusting mode at intervals to heat the plastic film under the plastic film conveyed by the clamping conveying mechanism, the temperature sensors are arranged in the heat preservation cabin in an array mode to detect the temperature of each area in the heat preservation cabin, when the temperature of any area exceeds a set temperature, the control system adjusts the heating temperature of the PTC heater with the temperature exceeding the area by controlling the transformer to down-regulate the power supply voltage, or controls the lifting mechanism connected with the PTC heater to down-regulate the temperature of the area, when the temperature sensor detects that the temperature is lower than the set temperature, the control system adjusts the heating temperature of the PTC heater with the temperature being too low by controlling the transformer to up-regulate the power supply voltage, or controls the lifting mechanism connected with the PTC heater to up-regulate the temperature of the area, so as to ensure that the plastic film is heated and softened at the balance temperature of the heat preservation bin, so that the integral softening strength of the plastic film is consistent, further ensure that the integral softening effect of the plastic film during blow molding expansion molding is balanced and stable, greatly reduce the defective rate of finished products, improve the production benefit of enterprises, and through further arrangement, namely, the arrangement of the second PTC heater and the second transformer enables the plastic film to auxiliary heat two sides on the plastic film, avoid steam to rise to be higher than both sides to plastic film upper surface middle part heating temperature, effectively ensure in the whole heat preservation storehouse each regional heating temperature balanced, further improve the whole softening effect of plastic film, improve the product percent of pass, the temperature sensor equipartition sets up can be more effective accurate on four faces in the heat preservation storehouse detect the temperature of each region in the detection heat preservation storehouse, it is accurate to make control system effectively regulate and control the control by temperature change of each region in the guarantee heat preservation storehouse, make the whole of plastic film soften more evenly, can extensively popularize and apply.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a plastic film heat softening device according to an embodiment of the present invention.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and specific embodiments, wherein the plastic roll conveying device, the thermoforming mold, the blow molding device suction cup, the finished product conveying device, and the rim charge collecting device are all existing mechanisms, in chinese patent documents: cn201320226306.x a thermoforming mold with a reversed container, CN201820573331.8 a blow molding device of a cup lid thermoforming apparatus, CN201610728287.9 a self-shearing mold with a thermoforming mechanism of a vacuum negative pressure structure, etc. are disclosed and thus will not be described in detail in the following embodiments.
Referring to fig. 1 and 2, a preferred high-efficiency thermal forming food storage box production line of the present invention comprises a control system, a plastic roll conveying device 2, a plastic film heating and softening device 3, a thermal forming mold 4, a blow molding device 5, a pushing mechanism 6, a suction cup transfer device 7, a finished product conveying device 8 and a rim charge collecting device 9, which are arranged on a frame 1, wherein the plastic roll conveying device 2 conveys a plastic film 10, which is heated and softened by the plastic film heating and softening device 3, to between an upper mold and a lower mold of the thermal forming mold 4, and finally to the rim charge collecting device 9 for collecting the plastic film 10, the blow molding device 5 performs high-pressure blow molding on each cavity in the thermal forming mold 4 after the thermal forming mold 4 is closed to make the softened plastic film 10 expand and form in each cavity unit, the suction cup transfer device 7 comprises a plurality of negative-pressure suction cups matched with the arrangement and number of each cavity unit of the thermal forming mold 4, the pushing mechanism 6 comprises a driving unit and a fixing rod, the driving unit is an air cylinder, an output shaft of the driving unit is connected with one end of the fixing rod, the other end of the fixing rod is connected with the sucker transfer device, the pushing mechanism 6 is connected with and drives the sucker transfer device 7 to move on the rack 1 to adsorb and transfer a box body or a box cover of each food storage box demoulded after the thermoforming mold 4 is separated to the finished product conveying device 8 for stacking, the finished product conveying device 8 conveys a preset stacking number of finished products to a warehouse, the plastic film heating and softening device 3 comprises a heat preservation cabin 31, a clamping and conveying mechanism 32, a plurality of temperature sensors 33, a plurality of PTC heaters 34, transformers 35 matched with the PTC heaters 34 in number, a plurality of lifting mechanisms 36 matched with the heaters 34 in number, two second transformers 37 and two second PTC heaters 38, the centre gripping conveying mechanism 32 is located the middle part both sides in heat preservation storehouse 31 along the horizontal direction and centre gripping conveying mechanism 32's import is connected with plastic book conveyor 2's output, centre gripping conveying mechanism 32 centre gripping plastic film 10 both sides are carried to thermoforming mould 4, each elevating system 36 all includes a set of cylinder of locating PTC heater 34 bottom both ends and driving PTC heater 34 in heat preservation storehouse 31 oscilaltion, each PTC heater 34 is respectively through each elevating system 36 can go up and down to lift adjustment ground interval arrange locate in heat preservation storehouse 31 be located the below of the plastic film 10 that centre gripping conveying mechanism 32 carried to plastic film 10 heating, two second PTC heaters 38 are located respectively in heat preservation storehouse 31 the middle of the left part and the right part that lie in the plastic film 10 top, two second transformers 37 are connected with the power supply end of two second PTC heaters 38 respectively, each temperature sensor 33 is arranged on four upper and lower sides about in heat preservation storehouse 31 with the mode of arranging of array respectively and is detected The temperature of each area in the heat preservation cabin, each transformer 35 is respectively connected with the power supply end of each PTC heater 34, the control system is a PLC controller, the output end of each temperature sensor 33 is connected with the input end of the control system, and the plastic coil conveying device 2, each PTC heater 34, two second PTC heaters 38, each transformer 35, two second transformers 37, each lifting mechanism 36, the blow molding device 5, the pushing mechanism 6, the suction cup transferring device 7, the finished product conveying device 8 and the rim charge collecting device 9 are all connected and controlled by the control system.
The control system can also be a CNC controller, each lifting mechanism can also be a group of oil cylinders which are arranged at two ends of the bottom of the PTC heater and drive the PTC heater to lift up and down in the heat preservation cabin, the driving unit of the pushing mechanism can also be the oil cylinders, and each PTC heater can be arranged in the heat preservation cabin at intervals along the horizontal direction or the horizontal direction through each lifting mechanism in a way of being capable of lifting up and down and being adjusted.
The invention realizes the automatic production of the food storage box by arranging a plastic roll conveying device, a plastic film heating and softening device, a thermoforming mould, a sucker transfer device, a pushing mechanism, a finished product conveying device and an edge material collecting device into a production line in sequence, and the plastic film heating and softening device is designed to be composed of a heat preservation cabin, a clamping and conveying mechanism, a plurality of temperature sensors, a plurality of PTC heaters, a transformer matched with the PTC heaters in quantity and a plurality of lifting mechanisms matched with the PTC heaters in quantity, wherein each PTC heater is respectively arranged in the heat preservation cabin at intervals below the plastic film conveyed by the clamping and conveying mechanism in an up-and-down lifting and adjusting way through each lifting mechanism to heat the plastic film, each temperature sensor is arranged in the heat preservation cabin in an array way to detect the temperature of each area in the heat preservation cabin, when the temperature of any area exceeds the set temperature, the control system adjusts the heating temperature of the PTC heater with the temperature exceeding the area by controlling the transformer to down-regulate the power supply voltage, or controls the lifting mechanism connected with the PTC heater to down-regulate the temperature of the area, when the temperature sensor detects that the temperature is lower than the set temperature, the control system adjusts the heating temperature of the PTC heater with the temperature being too low by controlling the transformer to up-regulate the power supply voltage, or controls the lifting mechanism connected with the PTC heater to up-regulate the temperature of the area, so as to ensure that the plastic film is heated and softened at the balance temperature of the heat preservation bin, so that the integral softening strength of the plastic film is consistent, further ensure that the integral softening effect of the plastic film during blow molding expansion molding is balanced and stable, greatly reduce the defective rate of finished products, improve the production benefit of enterprises, and through further arrangement, namely, the arrangement of the second PTC heater and the second transformer enables the plastic film to auxiliary heat two sides on the plastic film, avoid steam to rise to be higher than both sides to plastic film upper surface middle part heating temperature, effectively ensure in the whole heat preservation storehouse each regional heating temperature balanced, further improve the whole softening effect of plastic film, improve the product percent of pass, the temperature sensor equipartition sets up can be more effective accurate on four faces in the heat preservation storehouse detect the temperature of each region in the detection heat preservation storehouse, it is accurate to make control system effectively regulate and control the control by temperature change of each region in the guarantee heat preservation storehouse, make the whole of plastic film soften more evenly, can extensively popularize and apply.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A high-efficiency thermal forming food storage box production line comprises a control system, a plastic roll conveying device, a plastic film heating and softening device, a thermal forming die, a blow molding device, a pushing mechanism, a sucker transfer device, a finished product conveying device and an edge material collecting device, wherein the plastic roll conveying device is arranged on a rack, the plastic roll conveying device conveys a plastic film to be heated and softened by the plastic film heating and softening device and then conveyed to a position between an upper die and a lower die of the thermal forming die, finally the plastic film is conveyed to the edge material collecting device to collect edge materials of the plastic film, the blow molding device performs high-pressure blow molding on each cavity in the thermal forming die after the thermal forming die is closed to enable the softened plastic film to be expanded and formed in each cavity unit, the pushing mechanism is connected with and drives the sucker transfer device to move on the rack to enable box bodies or box covers of each food storage box to be adsorbed and transferred to the finished product conveying device to be stacked, and the food storage boxes are demoulded after the thermal forming die are separated, finished product conveyor will predetermine the finished product of piling up quantity and send out to the storage, its characterized in that: the plastic film heating and softening device comprises a heat preservation bin, a clamping and conveying mechanism, a plurality of temperature sensors, a plurality of PTC heaters, transformers matched with the PTC heaters in number and a plurality of lifting mechanisms matched with the PTC heaters in number, wherein the clamping and conveying mechanism is arranged on two sides of the middle of the heat preservation bin along the horizontal direction, an inlet of the clamping and conveying mechanism is connected with an output end of the plastic roll conveying device, the clamping and conveying mechanism clamps two sides of a plastic film and conveys the plastic film to a thermoforming mold, the PTC heaters are respectively arranged in the heat preservation bin in an up-and-down lifting adjusting mode through the lifting mechanisms at intervals and are positioned below the plastic film conveyed by the clamping and conveying mechanism to heat the plastic film, the temperature sensors are arranged in the heat preservation bin in an array mode to detect the temperature of each area in the heat preservation bin, and the transformers are respectively connected with power supply ends of the PTC heaters, the plastic roll conveying device, the plastic film heating and softening device, the thermoforming mold, the blow molding device, the pushing mechanism, the sucking disc transfer device, the finished product conveying device and the rim charge collecting device are all connected and controlled by a control system.
2. The high efficiency thermoformed food storage box production line of claim 1, wherein: the control system is a PLC controller or a CNC controller.
3. The high efficiency thermoformed food storage box production line of claim 1, wherein: each lifting mechanism comprises a group of cylinders or oil cylinders which are arranged at two ends of the bottom of the PTC heater and drive the PTC heater to lift up and down in the heat preservation bin.
4. The high efficiency thermoformed food storage box production line of claim 1, wherein: the plastic film heat preservation cabin is characterized by further comprising two second PTC heaters and two second transformers, the two second PTC heaters are respectively arranged in the middle of the left portion and the right portion above the plastic film in the heat preservation cabin, and the two second transformers are respectively connected with power supply ends of the two second PTC heaters.
5. The high efficiency thermoformed food storage box production line of claim 1, wherein: the sucking disc transfer device comprises a plurality of negative pressure sucking discs which are arranged and matched with the cavity units of the thermal forming die in number.
6. The high efficiency thermoformed food storage box production line of claim 1, wherein: the pushing mechanism comprises a driving unit and a fixing rod, the driving unit is an air cylinder or an oil cylinder, an output shaft of the driving unit is connected with one end of the fixing rod, and the other end of the fixing rod is connected with the sucker transfer device.
7. The high efficiency thermoformed food storage box production line of claim 1, wherein: the temperature sensors are respectively arranged on the upper, lower, left and right surfaces in the heat preservation cabin in an array arrangement mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110624962.4A CN113334740A (en) | 2021-06-04 | 2021-06-04 | High-efficient thermoforming food storage box production line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110624962.4A CN113334740A (en) | 2021-06-04 | 2021-06-04 | High-efficient thermoforming food storage box production line |
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| CN113334740A true CN113334740A (en) | 2021-09-03 |
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Cited By (1)
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| CN115534190A (en) * | 2022-11-30 | 2022-12-30 | 山东欧亚高分子材料有限公司 | Uniform polyimide film drying device and using method thereof |
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Application publication date: 20210903 |