CN116692161B - Heat sealing head for sealing soft plastic packaging composite film bag and temperature control method thereof - Google Patents
Heat sealing head for sealing soft plastic packaging composite film bag and temperature control method thereof Download PDFInfo
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- CN116692161B CN116692161B CN202310974537.7A CN202310974537A CN116692161B CN 116692161 B CN116692161 B CN 116692161B CN 202310974537 A CN202310974537 A CN 202310974537A CN 116692161 B CN116692161 B CN 116692161B
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- 238000007789 sealing Methods 0.000 title claims abstract description 106
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004033 plastic Substances 0.000 title claims abstract description 18
- 229920003023 plastic Polymers 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 187
- 239000004744 fabric Substances 0.000 claims abstract description 46
- 238000012546 transfer Methods 0.000 claims abstract description 33
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 17
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 17
- 229920002457 flexible plastic Polymers 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 239000003350 kerosene Substances 0.000 claims description 5
- 239000005022 packaging material Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 239000012774 insulation material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 11
- 238000009434 installation Methods 0.000 description 9
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012785 packaging film Substances 0.000 description 2
- 229920006280 packaging film Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
- B65B59/003—Arrangements to enable adjustments related to the packaging material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B2051/105—Heat seal temperature control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Package Closures (AREA)
Abstract
The invention discloses a heat sealing head for sealing a soft plastic packaging composite film bag and a temperature control method thereof, which comprises the following steps: the heating device comprises a heating body, wherein the front side of the heating body is provided with a heating working surface, a heat preservation and insulation layer avoiding the heating working surface is arranged on the heating body, an oil cavity is formed in the heating body, a heat transfer medium is filled in the oil cavity, and a heating pipe is arranged in the heat transfer medium; the heat-sealing head mounting seat is fixedly arranged at the rear side of the heating body; the tetrafluoro cloth mounting cards are provided with two groups and are fixedly connected with the two ends of the heat sealing head mounting seat; the tetrafluoro cloth is tightly attached to the heating working surface, and two ends of the tetrafluoro cloth are fixedly connected with the tetrafluoro cloth mounting clamp on the corresponding side; the heat sealing guide assembly is arranged at one end of the heating body and guides the packaging bag to smoothly enter a heat sealing station corresponding to the heating working face.
Description
Technical Field
The invention belongs to the technical field of packaging equipment, and particularly relates to a heat sealing head for sealing a soft plastic packaging composite film bag and a temperature control method thereof.
Background
Packaging plays a critical role in the transportation and sales of goods as part of the goods themselves. At present, the plastic composite film is the most widely used packaging material applied to various industries such as pets, foods, daily chemicals and the like, and for bag sealing of the plastic packaging film, the most common plate type heat sealing process is often adopted, namely, the two layers of plastic films are in a molten state under the pressure action of a heat sealing head by applying temperature to the heat sealing head so as to be compounded, so that the sealing purpose is realized. The temperature distribution on the surface of the heat sealing head of the packaging machine is an important factor influencing the heat sealing quality of the plastic film, and research on how to improve the uniformity of the temperature on the surface of the heat sealing head has a key meaning for improving the heat sealing quality of the packaging bag.
The heat-sealing heating block disclosed in Chinese patent CN211943986U is characterized in that a heating pipe is directly arranged inside a heat-sealing head, and the heat-sealing head is heated by converting electric energy of the heating pipe into heat energy and transmitting temperature to the heat-sealing head. But the heating pipe has the inhomogeneity at the heat generation in-process, and the influence of outside air heat convection easily causes the heat sealing intensity of heat-sealing head surface both ends insufficient, and the problem of overheat deformation appears in the center, influences wrapping bag heat sealing quality, especially in the heat sealing process of big wrapping bag, wrapping bag heat sealing size is long, and heat-sealing head surface difference in temperature directly influences the closing effect. Meanwhile, in the heat sealing process, only one surface of the heat sealing head, which is in direct contact with the packaging film, is a heat sealing working surface, other surfaces are non-working surfaces, and a great part of heat is transferred to the non-heating working surface of the heat sealing head in a heating pipe heating mode, so that the energy utilization rate is low.
Therefore, how to provide a heat-sealing head for plastic films, which improves the uniformity of the surface temperature of the heat-sealing head, is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a heat sealing head for sealing a soft plastic packaging composite film bag and a temperature control method thereof, which can realize uniform heating of a heating working surface of a heating head and improve sealing quality of the packaging bag.
In order to achieve the above purpose, the invention adopts the following technical scheme: a heat seal for sealing a flexible plastic packaging composite film bag, comprising:
the heating device comprises a heating body, wherein the front side of the heating body is provided with a heating working surface, a heat preservation and insulation layer avoiding the heating working surface is arranged on the heating body, an oil cavity is formed in the heating body, a heat transfer medium is filled in the oil cavity, and a heating pipe is arranged in the heat transfer medium;
the heat-sealing head mounting seat is fixedly arranged on the rear side of the heating body;
the polytetrafluoroethylene cloth mounting cards are provided with two groups and are fixedly connected to the two ends of the heat-seal head mounting seat;
the tetrafluoro cloth is tightly attached to the heating working surface, and two ends of the tetrafluoro cloth are fixedly connected with the tetrafluoro cloth installation clamp on the corresponding side;
the heat sealing guide assembly is arranged at one end of the heating body and guides the packaging bag to smoothly enter a heat sealing station corresponding to the heating working face.
The beneficial effects of the invention are as follows: the inside of heating body sets up the oil pocket, and the heat transfer medium is filled into to the oil pocket, utilizes the heating pipe to heat for the heat transfer medium, based on the heat transfer stability of heat transfer medium, realizes heating working face's temperature uniformity, improves wrapping bag sealing quality, and the heat transfer medium in the oil pocket can reduce the difference in temperature that traditional heat head produced because of the heating pipe is inhomogeneous, realizes heat-seal temperature homogeneity. The heat preservation and insulation layer avoiding the heating working surface is arranged on the outer side of the heating body, so that the energy loss of the non-heating working surface of the heat seal head can be reduced, and the energy utilization rate of heat seal heating is improved.
Preferably, the both ends of heating body all are equipped with the installation screw that link up the oil pocket, the heating pipe is single-end screw thread heating pipe, the winding has high temperature sealing strip between heating pipe and the installation screw, the inside of heating pipe is equipped with K type thermocouple.
The technical effects produced by the method are as follows: the high-temperature sealing belt is wound at the thread, so that the tightness under the high-temperature heat sealing condition can be realized, the heat conduction oil is prevented from leaking, the K-type thermocouple can feed back a temperature signal, the power of the heating pipe is convenient to control, and the temperature control of the heating working face is realized.
Preferably, the heating body is rectangular, two ends of the heating body are end covers, wire passing holes are formed in the end covers, a heating pipe wire protecting sleeve is arranged at the top of the end covers, and a lead wire of the heating pipe penetrates through the end covers and the heating pipe wire protecting sleeve to be connected with an external power supply.
The technical effects produced by the method are as follows: two heating pipes are used as direct heat sources, heat transfer medium in the oil cavity is heated, the heating pipes are prevented from working under severe working conditions, the power line and the thermocouple at the end of the heating pipes are prevented from being damaged, normal use of equipment is affected, an end cover and a heating pipe wire protecting sleeve are arranged, meanwhile, line winding can be avoided, the line is kept clean, and equipment cleaning is facilitated.
Preferably, the heating body is 6061 aluminum alloy, the length of a heating working surface of the heating body is 400mm, and the heat transfer medium is heat conduction kerosene.
The technical effects produced by the method are as follows: the heating body is 6061 aluminum alloy for the heat sealing head is light, reduces the inertial impact that frequent reciprocating motion of heat sealing brought, improves the life of heat sealing head, improves equipment energy utilization simultaneously, reduces heat sealing energy loss, and heat conduction kerosene heat transfer is stable, is convenient for the even heating of heating working face, and heat transfer effect is good.
Preferably, the heat-insulating layer is of a side-placed concave structure, and is made of polyurethane heat-insulating materials.
The technical effects produced by the method are as follows: the heat preservation insulating layer is fixedly connected with the heating body through a plurality of screws, the polyurethane heat preservation material has good heat preservation effect and light weight, and the heating body is matched to realize the light weight effect of the heating head.
Preferably, the heat preservation insulating layer is close to one side interval of heat-seal head mount pad is equipped with a plurality of reference columns, be equipped with the screw thread blind hole on the reference column, the heat-seal head mount pad is rectangular shape structure, set up a plurality of regulation on the heat-seal head mount pad the waist type slotted hole of heating body mounting height, the elasticity bolt has been arranged to the level in the waist type slotted hole, elasticity bolt and screw thread blind hole are connected.
The technical effects produced by the method are as follows: the transverse positioning installation of the heat seal head is realized by the positioning columns, the installation height of the heat seal head (heating body and heat preservation and insulation layer) can be adjusted by the waist-shaped slotted holes which are vertically arranged on the heat seal head installation seat, the height adjustment of the heat seal head is realized, and the heated area of the packaging bag is more uniform based on the same horizontal position.
Preferably, the tetrafluorocloth installation card comprises an upper fixing plate, a lower fixing plate, a tetrafluorocloth fixing shaft, a limiting piece and a screwing screw, wherein the upper fixing plate is fixedly connected with the lower fixing plate on the top surface and the bottom surface of the end edge of the heat sealing head installation seat, a clamping groove for installing tetrafluorocloth is formed in the tetrafluorocloth fixing shaft, the tetrafluorocloth fixing shaft is rotationally connected between the upper fixing plate and the lower fixing plate, the limiting piece is fixed at the bottom of the lower fixing plate, the bottom end of the tetrafluorocloth fixing shaft penetrates through the lower fixing plate, the limiting piece and is fixedly connected with one end of the synchronous plate, the screwing screw is rotationally connected with the edge of the other end of the synchronous plate, and the limiting piece is provided with the limiting groove for limiting the screwing screw.
The technical effects produced by the method are as follows: the tensioning of the tetrafluorocloth is realized by forward rotation of the tetrafluorocloth fixing shaft, the loosening of the tetrafluorocloth is realized by reverse rotation, and the circumferential position of the tetrafluorocloth fixing shaft is locked by the cooperation of the screwing screw and the limiting groove on the limiting piece.
Preferably, the heat seal guiding assembly comprises a heat seal guiding fixing support and a heat seal guiding sheet, wherein the heat seal guiding fixing support is fixed at one end bottom of the heat insulation layer through countersunk screws, and the heat seal guiding sheet is mounted on the heat seal guiding fixing support in a height-adjustable manner.
The technical effects produced by the method are as follows: the mounting height of the heat-seal guide piece on the heat-seal guide fixing support can be adjusted according to the size of the packaging bag, so that the packaging bag can smoothly enter the heat-seal station to realize heat seal, and the success rate of the packaging bag entering the heat-seal station can be improved under the high-speed packaging condition.
The invention also discloses a temperature control method using the heat sealing head, which comprises the following steps:
step one: the heating pipe is connected with an external power supply and electrified, the initial heating temperature of the heating pipe is set according to the type of the packaging material, the heating pipe converts electric energy into heat energy, and the heat transfer medium in the oil cavity is heated;
step two: the heating pipe heats up, the heat transfer medium is heated uniformly and transfers the heat to the heating working surface uniformly;
step three: the thermocouple in the heating pipe feeds back the temperature signal to the temperature control module in real time, and the temperature control module adjusts the heating power of the heating pipe in real time based on the feedback signal until the output temperature of the heating working surface is a set value;
step four: the input power of the heating pipe is stable, the temperature of the heating working surface is uniform, and the heating head starts the heat sealing work.
The beneficial effects of the invention are as follows: based on the stability of heat transfer of the heat conduction oil liquid, the bag openings of different packaging materials are sealed through the control of the power of the heating pipe.
Drawings
FIG. 1 is a schematic view of a heat-seal head for sealing a flexible plastic packaging composite film bag according to the present invention;
FIG. 2 is a cross-sectional view of a thermal head for sealing a flexible plastic packaging composite film bag in accordance with the present invention;
FIG. 3 is a view showing the assembly of a heating tube and a protective wire sleeve of a heat seal head for sealing a soft plastic package composite film bag;
FIG. 4 is a schematic view of a heat seal head mounting base for a heat seal head for sealing a soft plastic packaging composite film bag;
FIG. 5 is a drawing of a tetrafluoro cloth arrangement of a heat seal head for sealing a flexible plastic packaging composite film bag according to the present invention;
FIG. 6 is a schematic view of a tetrafluoro cloth mounting clip of a heat seal head for sealing a flexible plastic packaging composite film bag according to the present invention;
fig. 7 is a schematic view of a heat seal guiding assembly of a heat seal head for sealing a soft plastic package composite film bag according to the present invention.
The heat-sealing device comprises a heating body, a heating working surface, a heat-sealing head mounting seat, a heat-sealing guide assembly, a high-temperature sealing belt, a heat-insulating layer, an oil cavity, a heating pipe, a heat-transferring medium, a heating pipe protecting wire sleeve, a locking nut, an end cover, a positioning column, a gasket, a tightening bolt, a fixing plate, a locking nut, a fixing shaft, a limiting plate, a fixing plate, a countersunk head screw, a heat-sealing guide fixing support, a heat-sealing guide plate, a regulating screw and a waist-shaped slot.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 7 of the drawings, a heat sealing head for sealing a flexible plastic packaging composite film bag according to an embodiment of the present invention includes:
the heating device comprises a heating body 1, wherein the front side of the heating body 1 is provided with a heating working surface 101, a heat preservation and insulation layer 7 avoiding the heating working surface is arranged on the heating body 1, the heat loss of a non-heating working surface is reduced by utilizing the heat preservation and insulation layer, an oil cavity 8 is arranged in the heating body 1, a heat transfer medium 10 is filled in the oil cavity 8, a heating pipe 9 is arranged in the heat transfer medium 10, the heat transfer medium is used for transferring heat through the heating pipe, the heat transfer medium is selected from heat-conducting kerosene, the heat transfer is stable, and the heat can be uniformly transferred to the heating working surface 101;
the heat-seal head mounting seat 2 is fixedly arranged on the rear side of the heating body 1;
the four-fluorine cloth mounting cards 4 are two groups of four-fluorine cloth mounting cards 4 and are fixedly connected to the two ends of the heat-seal head mounting seat 2;
the polytetrafluoroethylene cloth 3, the polytetrafluoroethylene cloth 3 is tightly attached to the heating working surface 101, two ends of the polytetrafluoroethylene cloth are fixedly connected with the polytetrafluoroethylene cloth mounting cards 4 on the corresponding sides, the tensioning degree of the polytetrafluoroethylene cloth on the working surface can be flexibly adjusted through the polytetrafluoroethylene cloth mounting cards, the four-fluorine cloth heating device has the advantages of convenience in mounting and simple structure, the polytetrafluoroethylene cloth has a protective effect on the heating working surface of the heat seal head, the damage of the heat seal head caused by the heat seal melted packaging bag melt adhesive can be reduced, and the maintenance cost of the heat seal head is reduced;
the heat seal guiding assembly 5 is arranged at one end of the heating body 1 and guides the packaging bag to smoothly enter the heat seal station, so that the success rate of the packaging bag entering the heat seal station under the high-speed packaging condition can be improved.
In other embodiments, the two ends of the heating body 1 are all provided with mounting screw holes penetrating through the oil cavity 8, the heating pipe 9 is a single-head threaded heating pipe, the high-temperature sealing belt 6 is wound between the heating pipe 9 and the mounting screw holes, the tightness of the heat seal head can be realized, the heat conduction oil inside the heat seal head is prevented from leaking, and the K-type thermocouple is arranged inside the heating pipe 9. The heating temperature can be adjusted, the rated power is 200W, and the heating pipe can heat water, oil and other liquids.
In other embodiments, the two ends of the heating body 1 are fixedly connected with end covers 13, wire passing holes are formed in the end covers 13, the top of each end cover 13 is provided with a heating tube wire protecting sleeve 11, and the lead wires of the heating tubes 9 penetrate through the end covers 13 and the heating tube wire protecting sleeves 11 to be connected with an external power supply. In order to prevent the heating pipe from being damaged by a power line and a thermocouple at the end of the heating pipe under severe working conditions and to influence normal use of equipment, the wire protection pipe assembly provided by the invention can effectively protect the power line and the thermocouple of the heating pipe 9 from being damaged, can avoid winding of a circuit, keeps the circuit clean and tidy, and is convenient for equipment cleaning.
In other embodiments, the heating body 1 is 6061 aluminum alloy, is relatively lightweight, has a heating surface length of 400mm, the heat transfer medium 10 is thermally conductive kerosene, has a corresponding density of 889kg/m3, a specific heat capacity of 2433.8J/(kg·deg.c), a thermal conductivity of 0.105W/(m·k), and a kinematic viscosity coefficient of 2.6mpa·s.
In other specific embodiments, the heat-insulating layer 7 is of a side concave structure, so that better wrapping is achieved, the heat-insulating layer 7 is made of polyurethane heat-insulating materials, the heat-insulating layer and the heating body are connected through a plurality of screws, the weight of the heat seal head can be reduced, inertial impact caused by frequent reciprocating motion of heat sealing is reduced, the service life of the heat seal head is prolonged, the energy utilization rate of equipment is improved, and heat sealing energy loss is reduced.
In other embodiments, a plurality of positioning columns 14 are arranged at intervals on one side of the heat insulation layer 7, which is close to the heat-seal head mounting seat 2, a buffer gasket is arranged on each positioning column, a threaded blind hole is formed in the end part of each positioning column 14, the heat-seal head mounting seat 2 is of a strip-shaped structure, a plurality of vertically arranged waist-shaped slotted holes 27 are formed in the heat-seal head mounting seat 2, elastic bolts 16 are horizontally arranged in the waist-shaped slotted holes 27, the elastic bolts 16 are connected with the threaded blind holes, a gasket 15 for increasing stability is arranged on each elastic bolt, and the installation height of the heat-seal head is adaptively adjusted by utilizing the height position of each elastic bolt in each waist-shaped slotted hole.
In other specific embodiments, the tetrafluoro cloth mounting card 4 includes an upper fixing plate 17, a lower fixing plate 22, a tetrafluoro cloth fixing shaft 19, a limiting plate 21 and a screwing screw 20, the upper fixing plate 17 and the lower fixing plate 22 are fixedly connected on the top surface and the bottom surface of the end edge of the heat sealing head mounting seat 2, the tetrafluoro cloth fixing shaft 19 is provided with a clamping groove for mounting tetrafluoro cloth, the tetrafluoro cloth fixing shaft 19 is rotationally positioned between the upper fixing plate 17 and the lower fixing plate 22, the limiting plate 21 is fixed at the bottom of the lower fixing plate 22, the bottom end of the tetrafluoro cloth fixing shaft 19 passes through the lower fixing plate, the limiting plate and is fixedly connected with one end of the synchronous plate, the limiting plate 21 is provided with a limiting groove for limiting the circumferential position of the screwing screw, the screwing screw 20 is rotationally connected with the other end of the synchronous plate, the tetrafluoro cloth fixing shaft 19 is rotationally rotated forward to realize tensioning of the tetrafluoro cloth 3, and reverse rotation realizes loosening of the tetrafluoro cloth 3.
The polytetrafluoroethylene emulsion is used as a raw material to impregnate the high-performance fiber cloth to form the polytetrafluoroethylene fiber cloth 3, so that the damage of plastic formed by the wrapping material on the thermal head under the melting condition can be effectively reduced, and the maintenance cost of the thermal head is reduced.
In other embodiments, the heat seal guiding assembly 5 includes a heat seal guiding fixing support 24 and a heat seal guiding sheet 25, the heat seal guiding fixing support 24 is fixed at one end bottom of the heat insulation layer through a countersunk screw 23, the heat seal guiding sheet 25 is mounted on the heat seal guiding fixing support 24 in a height-adjustable manner, and the height position of the heat seal guiding sheet can be adjusted according to the size of the packaging bag.
A heat head for soft plastic packaging composite film bag encapsulation, as shown in fig. 1, install often and use on the packagine machine of board-like heat-seal, the inside conduction oil of heat-seal produces the flow in the high-speed motion of heat-seal process, realizes even heat transfer, can improve the homogeneity of heat-seal surface temperature, promotes packing heat-seal quality, and its specific debugging step is as follows:
s1, adjusting the elastic bolts 16 on the heat-seal head mounting seat 2 based on the selected package bag size and the selected seal height, and locking the elastic bolts 16 on the heat-seal head mounting seat 2 when the whole heat-seal head heating area is kept horizontal and is consistent with the height of the package bag heat-seal area.
S2, adjusting the heat sealing guide piece adjusting screw 26 by taking the height of the sealing area of the packaging bag from the upper edge of the packaging bag as a reference, so that the packaging bag can smoothly pass through the sealing guide and the sealing position is not influenced.
And S3, mounting the tetrafluoro cloth 3 on a tetrafluoro cloth fixing shaft 19, pulling out the screwing screw 20, gradually tensioning the tetrafluoro cloth 3 clockwise until the tetrafluoro cloth 3 is tightly attached to the heating working surface of the heat sealing head and no wrinkles appear, pressing the screwing screw 20 to be matched with a limit groove on the limit piece 21, and locking the tetrafluoro cloth 3.
S4, supplying power to the heat-sealing head heating pipe 9 through the packaging machine electric cabinet, generating heat after the heating pipe 9 is electrified, heating the heat-conducting oil in the heat-sealing head heating body, and heating the heating body through the wall surface by high-temperature heat-conducting oil, wherein the heating working surface is preheated until the heating working surface can stably output the heat-sealing temperature selected according to the material of the packaging bag.
The invention also discloses a temperature control method using the heat sealing head, which comprises the following steps:
step one: the heating pipe is connected with an external power supply and electrified, the initial heating temperature of the heating pipe is set according to the type of the packaging material, the heating pipe converts electric energy into heat energy, and the heat transfer medium in the oil cavity is heated;
step two: the heating pipe heats up, the heat transfer medium is heated uniformly and transfers the heat to the heating working surface uniformly;
step three: the thermocouple in the heating pipe feeds back the temperature signal to the temperature control module in real time, and the temperature control module adjusts the heating power of the heating pipe in real time based on the feedback signal until the output temperature of the heating working surface is a set value;
step four: the input power of the heating pipe is stable, the temperature of the heating working surface is uniform, and the heating head starts the heat sealing work.
Compared with the mode of heating by a heating pipe independently, the surface temperature uniformity of the heat seal head can be improved, the heating temperature difference of the sealing of the packaging bag during heat sealing is reduced, and the sealing quality of the packaging bag is improved.
For the device and the use method disclosed in the embodiments, since the device and the use method correspond to the method disclosed in the embodiments, the description is relatively simple, and the relevant places refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A thermal head for sealing a flexible plastic packaging composite film bag, comprising:
the heating device comprises a heating body (1), wherein one side of the heating body (1) is provided with a heating working surface (101), a heat preservation and insulation layer (7) avoiding the heating working surface (101) is arranged on the heating body (1), an oil cavity (8) is formed in the heating body (1), a heat transfer medium (10) is injected into the oil cavity (8), and a heating pipe (9) for heating the heat transfer medium (10) is arranged in the oil cavity (8); a plurality of positioning columns (14) are arranged at intervals on one side, close to the heat-sealing head mounting seat (2), of the heat-insulating layer (7), threaded blind holes are formed in the positioning columns (14), a plurality of waist-shaped slotted holes (27) for adjusting the mounting height of the heating body (1) are formed in the heat-sealing head mounting seat (2), elastic bolts (16) are horizontally arranged in the waist-shaped slotted holes (27), and the elastic bolts (16) are connected with the threaded blind holes;
the heat-sealing head mounting seat (2), the heat-sealing head mounting seat (2) is fixedly arranged on the other side of the heating body (1);
the polytetrafluoroethylene cloth mounting cards (4) are arranged in two groups and fixedly connected to the two ends of the heat-sealing head mounting seat (2); the polytetrafluoroethylene cloth mounting clamp (4) comprises an upper fixing plate (17), a lower fixing plate (22), a polytetrafluoroethylene cloth fixing shaft (19), a limiting piece (21) and a screwing screw (20), wherein the upper fixing plate (17) and the lower fixing plate (22) are fixedly connected to the top surface and the bottom surface of the end edge of the heat-sealing head mounting seat (2), a clamping groove for mounting polytetrafluoroethylene cloth is formed in the polytetrafluoroethylene cloth fixing shaft (19), the polytetrafluoroethylene cloth fixing shaft (19) is rotationally connected between the upper fixing plate (17) and the lower fixing plate (22), the limiting piece (21) is fixed to the bottom of the lower fixing plate (22), the bottom end of the polytetrafluoroethylene cloth fixing shaft (19) penetrates through the lower fixing plate, the limiting piece and is fixedly connected with one end of the synchronous plate, the screwing screw (20) is rotationally connected to the other end edge of the synchronous plate, and a limiting groove for limiting the position of the screwing screw (20) is formed in the limiting piece (21);
the tetrafluoro cloth (3) is tightly attached to the heating working surface (101), and two ends of the tetrafluoro cloth are fixedly connected with tetrafluoro cloth mounting cards (4) on the corresponding sides;
the heat sealing guide assembly (5), the heat sealing guide assembly (5) is installed at one end of the heating body (1) and guides the packaging bag to smoothly enter the heat sealing station corresponding to the heating working face (101).
2. The heat seal head for sealing the soft plastic packaging composite film bag according to claim 1, wherein the two ends of the heating body (1) are respectively provided with a mounting screw hole penetrating through the oil cavity (8), the heating pipe (9) is a single-head threaded heating pipe, a high-temperature sealing belt (6) is wound between the heating pipe (9) and the mounting screw hole, and a K-type thermocouple is arranged inside the heating pipe (9).
3. The heat seal head for sealing the soft plastic packaging composite film bag according to claim 2, wherein the heating body (1) is cuboid, two ends of the heating body are end covers (13), wire passing holes are formed in the end covers (13), a heating pipe wire protecting sleeve (11) is arranged at the top of the end covers (13), and a lead wire of the heating pipe (9) penetrates through the end covers (13) and the heating pipe wire protecting sleeve (11) to be connected with an external power supply.
4. A heat seal head for sealing a soft plastic package composite film bag according to claim 3, wherein the heating body (1) is made of aluminum alloy, the length of a heating working surface of the heating body (1) is 400mm, and the heat transfer medium (10) is heat-conducting kerosene.
5. The thermal seal head for sealing the soft plastic packaging composite film bag according to claim 1, wherein the thermal insulation layer (7) is of a side concave structure, and the thermal insulation layer (7) is made of polyurethane thermal insulation materials.
6. The heat seal head for sealing the soft plastic packaging composite film bag according to claim 1, wherein the heat seal head mounting seat (2) is of a strip-shaped structure.
7. The heat seal head for sealing the soft plastic packaging composite film bag according to claim 1, wherein the heat seal guiding assembly (5) comprises a heat seal guiding fixing support (24) and a heat seal guiding sheet (25), the heat seal guiding fixing support (24) is fixed at one end bottom of the heat insulation layer through a countersunk screw (23), and the heat seal guiding sheet (25) is mounted on the heat seal guiding fixing support (24) in a height-adjustable mode.
8. A temperature control method using the thermal head for sealing a flexible plastic packaging composite film bag according to any one of claims 1 to 7, characterized by comprising the steps of:
step one: the heating pipe is connected with an external power supply and electrified, the initial heating temperature of the heating pipe is set according to the type of the packaging material, the heating pipe converts electric energy into heat energy, and the heat transfer medium in the oil cavity is heated;
step two: the heating pipe heats up, the heat transfer medium is heated uniformly and transfers the heat to the heating working surface uniformly;
step three: the thermocouple in the heating pipe feeds back the temperature signal to an external temperature control module in real time, and the temperature control module adjusts the heating power of the heating pipe in real time based on the feedback signal until the output temperature of the heating working surface is a set value;
step four: the input power of the heating pipe is stable, the temperature of the heating working surface is uniform, and the heating head starts the heat sealing work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310974537.7A CN116692161B (en) | 2023-08-04 | 2023-08-04 | Heat sealing head for sealing soft plastic packaging composite film bag and temperature control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310974537.7A CN116692161B (en) | 2023-08-04 | 2023-08-04 | Heat sealing head for sealing soft plastic packaging composite film bag and temperature control method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN116692161A CN116692161A (en) | 2023-09-05 |
| CN116692161B true CN116692161B (en) | 2023-11-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2505340A1 (en) * | 2011-04-01 | 2012-10-03 | ROPEX Industrie-Elektronik GmbH | Film joining device, film bag and method for joining film sheets together |
| CN103043261A (en) * | 2011-10-12 | 2013-04-17 | 株式会社利富高 | Heat-sealing device |
| JP2013133106A (en) * | 2011-12-26 | 2013-07-08 | Toyo Seikan Group Holdings Ltd | Heat sealing apparatus and heat sealing method |
| CN112722445A (en) * | 2021-04-01 | 2021-04-30 | 常州江苏大学工程技术研究院 | Freshness protection package heat sealing device convenient for filling materials and heat sealing method |
| CN216401976U (en) * | 2021-04-28 | 2022-04-29 | 红塔烟草(集团)有限责任公司 | Large-size plastic packaging bag opening heat sealing device |
-
2023
- 2023-08-04 CN CN202310974537.7A patent/CN116692161B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2505340A1 (en) * | 2011-04-01 | 2012-10-03 | ROPEX Industrie-Elektronik GmbH | Film joining device, film bag and method for joining film sheets together |
| CN103043261A (en) * | 2011-10-12 | 2013-04-17 | 株式会社利富高 | Heat-sealing device |
| JP2013133106A (en) * | 2011-12-26 | 2013-07-08 | Toyo Seikan Group Holdings Ltd | Heat sealing apparatus and heat sealing method |
| CN112722445A (en) * | 2021-04-01 | 2021-04-30 | 常州江苏大学工程技术研究院 | Freshness protection package heat sealing device convenient for filling materials and heat sealing method |
| CN216401976U (en) * | 2021-04-28 | 2022-04-29 | 红塔烟草(集团)有限责任公司 | Large-size plastic packaging bag opening heat sealing device |
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| CN116692161A (en) | 2023-09-05 |
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