CN114654778B - TPU (thermoplastic polyurethane) airbag capable of preventing air leakage and preparation method thereof - Google Patents
TPU (thermoplastic polyurethane) airbag capable of preventing air leakage and preparation method thereof Download PDFInfo
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- CN114654778B CN114654778B CN202210357182.2A CN202210357182A CN114654778B CN 114654778 B CN114654778 B CN 114654778B CN 202210357182 A CN202210357182 A CN 202210357182A CN 114654778 B CN114654778 B CN 114654778B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000004433 Thermoplastic polyurethane Substances 0.000 title abstract description 33
- 229920002803 thermoplastic polyurethane Polymers 0.000 title abstract description 33
- 239000010410 layer Substances 0.000 claims abstract description 204
- 239000000463 material Substances 0.000 claims abstract description 126
- 239000000178 monomer Substances 0.000 claims abstract description 85
- 239000002344 surface layer Substances 0.000 claims abstract description 69
- 210000001161 mammalian embryo Anatomy 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000004512 die casting Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 14
- 238000004080 punching Methods 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 14
- 230000032683 aging Effects 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 239000004831 Hot glue Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/02—Inflatable articles
-
- 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
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/849—Packaging machines
- B29C66/8491—Packaging machines welding through a filled container, e.g. tube or bag
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/851—Bag or container making machines
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The invention particularly relates to an air leakage-proof TPU (thermoplastic polyurethane) air bag and a preparation method thereof, wherein the air bag preparation method comprises the steps of firstly carrying out film punching treatment on a surface layer material and a bottom layer material to respectively obtain an upper air bag with a first air bag cavity and a lower air bag with a second air bag cavity, then attaching the upper air bag with the lower air bag to form an air bag embryo through pre-sealing edges, connecting the first air bag cavity with the corresponding second air bag cavity to form an air bag embryo, pre-arranging at least one air inlet channel on the air bag embryo, and then carrying out secondary mould pressing to isolate the air inlet channel and the air bag channel after the air bag embryo is inflated to obtain the air bag, wherein all the air bag monomers of the air bag are mutually independent. The preparation method is simple and convenient to operate, low in production cost and high in production efficiency, and the whole bearing capacity of the air bag prepared by the method is strong, the air bag is elastic, impact-resistant, bending-resistant and not easy to leak air, and the whole bearing buffer performance of the air bag is not affected even if a single air bag monomer is damaged, so that the safety is high.
Description
Technical Field
The invention relates to the technical field of air bag production, in particular to an air leakage-proof TPU air bag and a preparation method thereof.
Background
The air bag is widely applied to the fields of home seat cushions, medical mattresses, sports protective equipment, packaging materials and the like due to light weight, good elasticity and impact resistance. However, the quality of the air bags obtained by the prior structure and manufacturing process is uneven, and the problems of air leakage, bending intolerance, poor bearing capacity and the like are easy to occur. The packaging air bag comprises a plurality of elastic air bags which are arranged in an array manner, wherein the plurality of elastic air bags are connected into a plane body through soft folded edges, air bag channels are arranged between adjacent elastic air bags which are longitudinally arranged in the plurality of elastic air bags, and the longitudinal elastic air bags and the transverse elastic air bags in the plurality of elastic air bags which are arranged in the array manner are all arranged in a straight line. The packaging air bag of this structure has increased the gas leakage risk and the preparation degree of difficulty of gasbag through the setting of a plurality of air inlets, and whole pressure-bearing performance is relatively poor. For example, chinese patent application CN201710609262.1 discloses a method for preparing an inflatable and deflatable air bag for shoe uppers, wherein an outer TPU film and an inner TPU film are bonded on a predetermined shape mold by high-frequency hot-pressing through a hot melt adhesive film to form a closed air chamber. The air bag obtained by bonding the hot melt adhesive film in the preparation method has the problems of low bonding strength, easy air leakage when the bearing strength is high and short service life. Based on this, improvements are required in the structure and manufacturing process of the airbag to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide an air leakage-proof TPU air bag and a preparation method thereof, wherein the air bag has the characteristics of high elasticity, high bearing strength, bending resistance, air leakage prevention and long service life, and meanwhile, the preparation method of the air bag has the advantages of high flexibility, low production cost and simplicity and convenience in operation.
The aim of the invention is realized by the following technical scheme: a preparation method of an air leakage-proof TPU air bag comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag and a lower layer air bag;
step three, attaching the upper layer air bag and the lower layer air bag, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
and step five, cutting edges and shaping the air bag obtained in the step four to obtain the air bag finished product.
Further, the surface layer material and the bottom layer material are TPU films. The TPU film is used as the surface layer material and the bottom layer material of the air bag, so that the air bag has excellent bearing capacity, impact resistance, elasticity, wear resistance and bending resistance, and meanwhile, the processing difficulty is low, and the air bag is easy to form.
Further, an elastic fabric layer is arranged on the upper surface of the surface layer material, and a fabric layer is arranged on the lower surface of the bottom layer material. The elastic fabric layer and the cloth layer are arranged, so that the surface layer material and the bottom layer material are easier to process, mold and demold, and the appearance and quality of the air bag are effectively improved through the selection of different elastic fabric layers and different cloth layers. In the invention, the specific operation is as follows: coating an adhesive on the upper surface of the surface layer material, attaching the elastic surface layer to the upper surface of the surface layer material, and drying for later use; coating the lower surface of the bottom layer material with an adhesive, attaching the cloth layer to the lower surface of the bottom layer material, and drying for later use. According to practical application needs, the surface layer material and the elastic surface layer, and the bottom layer material and the cloth layer can be fixed through hot-pressing adhesion.
Further, the gasbag embryo includes upper airbag and sets up in the lower floor's gasbag of upper airbag lower surface, be provided with a plurality of gasbag monomers between upper airbag and the lower floor's gasbag, a plurality of gasbag monomer are arranged into a plurality of gasbag monomer groups, and a plurality of gasbag monomers in every gasbag monomer group are arranging in proper order, are located between the adjacent gasbag monomer in same gasbag monomer group and are equipped with the gasbag passageway in advance between the adjacent gasbag monomer group, TPU gasbag embryo is equipped with at least one air inlet channel in advance, gasbag monomer and air inlet channel intercommunication, air inlet channel is used for being linked together with the external world, upper airbag and lower floor's gasbag paste and are equipped with banding connecting portion, banding connecting portion around in gasbag monomer, gasbag passageway and air inlet channel. Specifically, the upper layer air bag is provided with a plurality of first air bag cavities, and the first air bag cavities are formed by upwards protruding partial areas of the upper layer air bag; the lower layer air bag is provided with a plurality of second air bag cavities, and the second air bag cavities are formed by downwards protruding part areas of the lower layer air bag. The first air bag cavity is communicated with the corresponding second air bag cavity to form the air bag monomer.
In the invention, the upper layer air bag with a plurality of first air bag cavities and the lower layer air bag with a plurality of second air bag cavities are respectively obtained by performing film punching treatment on the surface layer material and the bottom layer material, the upper layer air bag and the lower layer air bag are bonded to form an air bag embryo, and the air bag embryo is provided with at least one air inlet channel and at least one air bag channel in advance to obtain the air bag embryo. The air bag embryo fills each air bag monomer to required saturation degree through the air inlet channel and the air bag channel, and then seals and cuts off the air inlet channel and the air bag so that each air bag monomer is mutually independent. The air bag manufactured through the arrangement of the structure has the advantages of good integral impact resistance and elasticity, bending resistance and air leakage prevention, and even if a single air bag monomer is damaged, the integral bearing and buffering performance of the air bag is not affected, so that the safety is high.
Further, the specific operation of the second step is as follows: and loading the surface layer material or the bottom layer material into a supporting frame, flattening, installing a required shape mold on a high-frequency machine, placing the supporting frame on a hot melting platform of the high-frequency machine, starting the high-frequency machine to carry out hot press molding on the surface layer material or the bottom layer material, and obtaining the upper layer air bag or the lower layer air bag.
Further, the specific operation of the second step is as follows: after fixing the surface layer material or the bottom layer material by using a jig, placing the surface layer material or the bottom layer material into an oven with the temperature of 130-180 ℃ for heating and softening for 30-60S, and then placing the softened surface layer material or the softened bottom layer material into a die of a plastic sucking machine to form an upper layer air bag or a lower layer air bag under the vacuum negative pressure condition. In actual operation, the vacuum degree of the plastic sucking machine is adaptively adjusted by parameters such as the thickness of the surface layer material or the bottom layer material.
Further, the specific operation of the second step is as follows: fixing the surface layer material or the bottom layer material by using a jig, heating and softening the surface layer material or the bottom layer material in an oven with the temperature of 130-180 ℃ for 30-60S, placing the softened surface layer material or the softened bottom layer material on a forming operation table, applying pressure by using a cold press die to perform die casting forming, wherein the pressure is 5-20 kg/square meter, the time is 30-60S, and demoulding to obtain the upper layer air bag or the lower layer air bag.
In the invention, the upper layer air bag and the lower layer air bag are easy to form through the film punching treatment in the second step, and the operation is flexible and the production efficiency is high.
Further, the specific operation of the third step is as follows: and (3) placing the upper layer air bag obtained in the second step on the upper surface of the lower layer air bag, fixing the upper layer air bag and the lower layer air bag by adopting a master die and a flat die, then placing the upper layer air bag and the lower layer air bag on a high-frequency machine, generating high-frequency current by using 0.8-1.2A current for 10-40S, welding the upper layer air bag and the lower layer air bag together except for an air bag monomer, an air inlet channel and an air bag channel through high-frequency processing to form a sealed edge connecting part, and removing the master die and the flat die after cooling to obtain the air bag embryo.
Further, the specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel for charging, a plurality of air bag monomers communicated with the air inlet channel are fixed by adopting a first edge sealing die, the air inlet channel is sealed and blocked by adopting a high-frequency machine, all air bag monomers are fixed by adopting a second edge sealing die, and the air inlet channel and the air bag channels are sealed and blocked by adopting the high-frequency machine, so that all air bag monomers of the air bags are mutually independent. In the fourth step, the current of the high-frequency machine is 0.8-1.2A, the current flowing time is 20-40S, and the temperature is 140-160 ℃. Through the operation of the fourth step, the tightness and the bending resistance of the air bag are improved, and the service life is prolonged.
Further, the specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel for charging, all the air bag monomers are fixed by adopting the second edge sealing die, and the air inlet channel and the air bag channels are sealed and separated by the high-frequency machine, so that all the air bag monomers of the air bag are mutually independent, namely the air bag monomers are not communicated. And through the operation of the fourth step, each air bag monomer is independently sealed, and even if the single air bag monomer is damaged, the whole bearing capacity and the elastic buffering performance of the TPU air bag are not affected. In the fourth step, the current of the high-frequency machine is 0.8-1.2A, the current flowing time is 20-40S, and the temperature is 140-160 ℃. The fourth step is simple to operate, high in production efficiency and short in time.
An air leakage-proof TPU air bag is prepared by the preparation method of the air bag.
The invention has the beneficial effects that: the invention discloses an air leakage-proof TPU (thermoplastic polyurethane) air bag and a preparation method thereof. The preparation method is simple and convenient to operate, low in production cost and high in production efficiency, and the whole bearing capacity of the air bag prepared by the method is strong, the air bag is elastic, impact-resistant, bending-resistant and not easy to leak air, and the whole bearing buffer performance of the air bag is not affected even if a single air bag monomer is damaged, so that the safety is high.
Drawings
FIG. 1 is a graph showing the effect of the air bag embryo according to the present invention.
FIG. 2 is a schematic structural view of the airbag blank according to the present invention.
FIG. 3 is a cross-sectional view of the airbag module according to the present invention.
The reference numerals are: 1-upper layer air bag, 2-lower layer air bag, 3-air bag monomer, 4-air bag channel, 5-air inlet channel, 6-edge sealing connecting part, 31-first air bag cavity, 32-second air bag cavity, 7-elastic fabric layer and 8-fabric layer.
Detailed Description
The invention will be further illustrated by the following examples, which are not intended to limit the scope of the invention, in order to facilitate the understanding of those skilled in the art.
As a preferred embodiment of the present invention, as shown in fig. 1-3, the airbag blank of the present invention includes an upper layer airbag 1 and a lower layer airbag 3 disposed on the lower surface of an upper layer airbag 2, a plurality of airbag monomers 3 are disposed between the upper layer airbag 1 and the lower layer airbag 2, the plurality of airbag monomers 3 are arranged into a plurality of airbag monomer groups, the plurality of airbag monomers 3 in each airbag monomer group are sequentially arranged, airbag channels 4 are pre-disposed between adjacent airbag monomers 3 and between adjacent airbag monomer groups in the same airbag monomer group, the TPU airbag blank is pre-provided with at least one air inlet channel 5, the airbag monomers 3 are communicated with the air inlet channel 5, the air inlet channel 5 is used for being communicated with the outside, the upper layer airbag 1 and the lower layer airbag 2 are attached and provided with edge sealing connection parts 6, and the edge sealing connection parts 6 surround the airbag monomers 3, the airbag channels 4 and the air inlet channel 5. Specifically, the upper layer airbag 1 is provided with a plurality of first airbag chambers 31, and the first airbag chambers 31 are formed by upwardly protruding partial areas of the upper layer airbag 1; the lower air bag 2 is provided with a plurality of second air bag chambers 32, and the second air bag chambers 32 are formed by downward bulge of partial areas of the lower air bag 2. The first air bag cavity 31 is communicated with the corresponding second air bag cavity 32 to form the air bag single body 3.
Furthermore, the TPU air bag embryo is provided with an air inlet channel 5 in advance, and an outlet of the air inlet channel 5 is arranged on an air bag monomer 3 positioned at the edge of the air bag embryo.
Further, adjacent air bag monomer groups are communicated through one or more air bag channels 4, and two ends of each air bag channel 4 are respectively arranged on two air bag monomers 3 positioned in different air bag monomer groups.
Example 1
A preparation method of an air leakage-proof TPU air bag comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag 1 and a lower layer air bag 2;
step three, attaching the upper layer air bag 1 and the lower layer air bag 3, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
and step five, cutting edges and shaping the air bag obtained in the step four to obtain the air bag finished product.
Further, the surface layer material and the bottom layer material are TPU films, an elastic surface layer 7 is arranged on the upper surface of the surface layer material, and a cloth layer 8 is arranged on the lower surface of the bottom layer material.
The specific operation of the second step is as follows: and (3) loading the surface layer material or the bottom layer material into a supporting frame, flattening, installing a needed shape mold on a high-frequency machine, placing the supporting frame on a hot melting platform of the high-frequency machine, starting the high-frequency machine to carry out hot press molding on the surface layer material or the bottom layer material, and obtaining the upper layer air bag 1 or the lower layer air bag 2.
The specific operation of the third step is as follows: and (3) placing the upper layer air bag 1 obtained in the second step on the upper surface of the lower layer air bag 2, fixing the upper layer air bag 1 and the lower layer air bag 2 by adopting a master die and a plate die, then placing the upper layer air bag 1 and the lower layer air bag 2 on a high-frequency machine, generating high-frequency current 30S by using 1.0A current, welding the upper layer air bag 1 and the lower layer air bag 2 together by high-frequency processing in the areas outside the air bag monomer 3, the air inlet channel 5 and the air bag channel 4 to form an edge sealing connecting part 6, and removing the master die and the plate die after cooling to obtain the air bag embryo. In this embodiment, the airbag blank is pre-provided with an air inlet channel 5, an air outlet of the air inlet channel 5 is opened at one of the airbag monomers 3, and the air inlet channel 5 is directly communicated with one of the airbag monomers 3 and is communicated with other airbag monomers 3 via the airbag monomer 3.
The specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel 5 for charging, a plurality of air bag monomers 3 communicated with the air inlet channel are fixed by adopting a first edge sealing die, the air inlet channel 5 is sealed and separated by adopting a high-frequency machine, all air bag monomers 3 are fixed by adopting a second edge sealing die, and a plurality of air bag channels 4 are sealed and separated by adopting the high-frequency machine, so that all air bag monomers 3 of the air bag are mutually independent, namely all air bag monomers are not communicated with each other. In the fourth step, the current of the high frequency machine is 0.8A, the current flowing time is 30S, and the temperature is 150 ℃.
The TPU airbag prepared by the preparation method of example 1 above was subjected to a longitudinal tear force (tensile force applied to unit finished product), a plane bearing pressure, a tear strength, a bending property test, and an aging test. The bending performance is measured by adopting a QB/T1471 standard (under normal temperature), the longitudinal tearing force test is measured by adopting a GB/T10654 standard, and the aging test is measured by adopting a GB/T3903.7 standard. The test results of the airbag obtained in example 1 above were: the longitudinal tearing force is 95kg, the plane bearing pressure is 780kg, the tearing strength is 25kg/cm, the aging test time is more than 180h, and the bending performance is more than 80000 times.
Example 2
A preparation method of an air leakage-proof TPU air bag comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag 1 and a lower layer air bag 2;
Step three, attaching the upper layer air bag 1 and the lower layer air bag 2, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
and step five, cutting edges and shaping the air bag obtained in the step four to obtain the air bag finished product.
Further, the surface layer material and the bottom layer material are TPU films, an elastic surface layer 7 is arranged on the upper surface of the surface layer material, and a cloth layer 8 is arranged on the lower surface of the bottom layer material.
The specific operation of the first step is as follows:
The specific operation of the second step is as follows: after the surface layer material or the bottom layer material is fixed by a jig, the surface layer material or the bottom layer material is placed in an oven with the temperature of 160 ℃ to be heated and softened for 40S, and then the softened surface layer material or the softened bottom layer material is placed in a die of a plastic uptake machine to form an upper layer air bag 1 or a lower layer air bag 2 under the vacuum negative pressure condition.
The specific operation of the third step is as follows: and (3) placing the upper layer air bag 1 obtained in the second step on the upper surface of the lower layer air bag 2, fixing the upper layer air bag 1 and the lower layer air bag 2 by adopting a master die and a plate die, then placing the upper layer air bag 1 and the lower layer air bag 2 on a high-frequency machine, generating high-frequency current 30S by using 1.0A current, welding the upper layer air bag 1 and the lower layer air bag 2 together by high-frequency processing in the areas outside the air bag monomer 3, the air inlet channel 5 and the air bag channel 4 to form an edge sealing connecting part 6, and removing the master die and the plate die after cooling to obtain the air bag embryo.
The specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel 5 for charging, a plurality of air bag monomers communicated with the air inlet channel are fixed by adopting a first edge sealing die, the air inlet channel 5 is sealed and blocked by adopting a high-frequency machine, all air bag monomers 3 are fixed by adopting a second edge sealing die, and a plurality of air bag channels 4 are sealed and blocked by adopting the high-frequency machine, so that all air bag monomers 3 of the air bag are mutually independent, namely all air bag monomers are not mutually communicated. In the fourth step, the current of the high frequency machine is 1.0A, the current flowing time is 20S, and the temperature is 140 ℃.
Example 3
A preparation method of an air leakage-proof TPU air bag comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag 1 and a lower layer air bag 2;
Step three, attaching the upper layer air bag 1 and the lower layer air bag 2, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
and step five, cutting edges and shaping the air bag obtained in the step four to obtain the air bag finished product.
Further, the surface layer material and the bottom layer material are TPU films, an elastic surface layer 7 is arranged on the upper surface of the surface layer material, and a cloth layer 8 is arranged on the lower surface of the bottom layer material.
Further, the specific operation of the second step is as follows: after fixing the surface layer material or the bottom layer material by using a jig, placing the surface layer material or the bottom layer material into an oven with the temperature of 150 ℃ for heating and softening for 40S, placing the softened surface layer material or the softened bottom layer material into a forming operation table, applying pressure by a cold pressing die to perform die casting forming, wherein the pressure is 15 kg/square meter, the time is 40S, and demoulding to obtain the upper layer air bag 1 or the lower layer air bag 2.
Further, the specific operation of the third step is as follows: and (3) placing the upper layer air bag 1 obtained in the second step on the upper surface of the lower layer air bag 2, fixing the upper layer air bag 1 and the lower layer air bag 2 by adopting a master die and a plate die, then placing the upper layer air bag 1 and the lower layer air bag 2 on a high-frequency machine, generating high-frequency current 20S by using 1.2A current, welding the upper layer air bag 1 and the lower layer air bag 2 together by high-frequency processing in the areas outside the air bag monomer 3, the air inlet channel 5 and the air bag channel 4 to form an edge sealing connecting part 6, and removing the master die and the plate die after cooling to obtain the air bag embryo.
Further, the specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel 5 for charging, a plurality of air bag monomers 3 communicated with the air inlet channel are fixed by adopting a first edge sealing die, the air inlet channel 5 is sealed and separated by adopting a high-frequency machine, all air bag monomers 3 are fixed by adopting a second edge sealing die, and a plurality of air bag channels 4 are sealed and separated by adopting the high-frequency machine, so that all air bag monomers 3 of the air bag are mutually independent, namely all air bag monomers are not communicated with each other. In the fourth step, the current of the high frequency machine is 1.0A, the current flowing time is 30S, and the temperature is 150 ℃.
The airbag prepared by the preparation method of example 3 was subjected to a longitudinal tear force (tensile force applied to a unit of finished product), a plane bearing pressure, a tear strength, a bending property test, and an aging test. The test results of the airbag obtained in example 3 above were: the longitudinal tearing force is 92kg, the plane bearing pressure is 770kg, the tearing strength is 20kg/cm, the aging test time is more than 180h, and the bending performance is more than 80000 times.
Example 4
A preparation method of an air leakage-proof TPU air bag comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag 1 and a lower layer air bag 2;
Step three, attaching the upper layer air bag 1 and the lower layer air bag 2, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
and step five, cutting edges and shaping the air bag obtained in the step four to obtain the air bag finished product.
Further, the surface layer material and the bottom layer material are TPU films.
The specific operation of the second step is as follows: and (3) loading the surface layer material or the bottom layer material into a supporting frame, flattening, installing a needed shape mold on a high-frequency machine, placing the supporting frame on a hot melting platform of the high-frequency machine, starting the high-frequency machine to carry out hot press molding on the surface layer material or the bottom layer material, and obtaining the upper layer air bag 1 or the lower layer air bag 2.
The specific operation of the third step is as follows: and (3) placing the upper layer air bag 1 obtained in the second step on the upper surface of the lower layer air bag 2, fixing the upper layer air bag 1 and the lower layer air bag 2 by adopting a master die and a plate die, then placing the upper layer air bag 1 and the lower layer air bag 2 on a high-frequency machine, generating high-frequency current 30S by using 1.0A current, welding the upper layer air bag 1 and the lower layer air bag 2 together by high-frequency processing in the areas outside the air bag monomer 3, the air inlet channel 5 and the air bag channel 4 to form an edge sealing connecting part 6, and removing the master die and the plate die after cooling to obtain the air bag embryo.
The specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel 5 for charging, a plurality of air bag monomers 3 communicated with the air inlet channel 5 are fixed by adopting a first edge sealing die, the air inlet channel 5 is sealed and separated by adopting a high-frequency machine, all air bag monomers 3 are fixed by adopting a second edge sealing die, and a plurality of air bag channels 4 are sealed and separated by adopting the high-frequency machine, so that all air bag monomers 3 of the air bag are mutually independent, namely all air bag monomers are not mutually communicated. In the fourth step, the current of the high frequency machine is 1.2A, the current flowing time is 30S, and the temperature is 150 ℃.
Example 5
A preparation method of an air leakage-proof TPU air bag comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag 1 and a lower layer air bag 2;
Step three, attaching the upper layer air bag 1 and the lower layer air bag 2, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
and step five, cutting edges and shaping the air bag obtained in the step four to obtain the air bag finished product.
Further, the surface layer material and the bottom layer material are TPU films, an elastic surface layer 7 is arranged on the upper surface of the surface layer material, and a cloth layer 8 is arranged on the lower surface of the bottom layer material.
Further, the specific operation of the second step is as follows: after fixing the surface layer material or the bottom layer material by using a jig, placing the surface layer material or the bottom layer material into an oven with the temperature of 130-180 ℃ for heating and softening for 30-60S, and then placing the softened surface layer material or the softened bottom layer material into a die of a plastic uptake machine to form the upper layer air bag 1 or the lower layer air bag 2 under the vacuum negative pressure condition.
Further, the specific operation of the third step is as follows: placing the upper layer air bag 1 obtained in the second step on the upper surface of the lower layer air bag 2, fixing the upper layer air bag 1 and the lower layer air bag 2 by adopting a master die and a plate die, then placing the upper layer air bag 1 and the lower layer air bag 2 on a high-frequency machine, generating high-frequency current 10-40S by using 0.8-1.2A current, welding the upper layer air bag 1 and the lower layer air bag 2 together by high-frequency processing in the areas outside the air bag monomer 3, the air inlet channel 5 and the air bag channel 4 to form an edge sealing connecting part 6, and removing the master die and the plate die after cooling to obtain the air bag embryo.
Further, the specific operation of the fourth step is as follows: after the inflating nozzle of the inflating device is inserted into the air inlet channel 5 for inflation, all the air bag monomers are fixed by adopting the second edge sealing die, and the plurality of air bag channels 4 are sealed and separated by the high-frequency machine, so that all the air bag monomers 3 of the air bag are mutually independent, namely all the air bag monomers are not mutually communicated. In the fourth step, the current of the high frequency machine is 1.2A, the current flowing time is 40S, and the temperature is 160 ℃.
In the invention, the finished TPU airbag products prepared by the preparation methods of the examples 1-5 all meet shipment standards, wherein the longitudinal tearing force is more than 85kg, the plane bearing pressure is in the range of 600-800kg, the tearing strength is more than 17kg/cm, the ageing performance test is more than 168h, and the bending performance is more than 80000 times. From the above, the airbag prepared by the TPU airbag preparation method provided by the invention has excellent bearing capacity, tear resistance and bending resistance, long service life and difficult air leakage.
The above specific examples are further illustrative of the technical solution and the advantageous effects of the present invention, and are not limiting to the embodiments. Any obvious substitutions would be within the scope of the invention for those skilled in the art without departing from the inventive concept.
Claims (7)
1. A preparation method of an air leakage-proof TPU air bag is characterized by comprising the following steps: the method comprises the following steps:
step one, preparing a surface layer material and a bottom layer material required by manufacturing the air bag;
step two, respectively carrying out die stamping treatment on the surface layer material and the bottom layer material to obtain an upper layer air bag and a lower layer air bag;
step three, attaching the upper layer air bag and the lower layer air bag, and performing pre-molding to obtain an air bag embryo;
Step four, inflating the airbag embryo obtained in the step three, and performing secondary mould pressing on the inflated airbag embryo to obtain the airbag;
step five, trimming and shaping the air bag obtained in the step four to obtain an air bag finished product;
the surface layer material and the bottom layer material are TPU films;
The air bag embryo comprises an upper air bag and a lower air bag arranged on the lower surface of the upper air bag, a plurality of air bag monomers are arranged between the upper air bag and the lower air bag, the air bag monomers are arranged into a plurality of air bag monomer groups, the air bag monomers in each air bag monomer group are sequentially arranged, air bag channels are preset between adjacent air bag monomers in the same air bag monomer group and between the adjacent air bag monomer groups, at least one air inlet channel is preset in the air bag embryo, the air bag monomers are communicated with the air inlet channel, the air inlet channel is used for being communicated with the outside, the upper air bag and the lower air bag are bonded and provided with edge sealing connecting parts, and the edge sealing connecting parts surround the air bag monomers, the air bag channels and the air inlet channel;
The specific operation of the third step is as follows: and (3) placing the upper layer air bag obtained in the second step on the upper surface of the lower layer air bag, fixing the upper layer air bag and the lower layer air bag by adopting a master die and a flat die, then placing the upper layer air bag and the lower layer air bag on a high-frequency machine, generating high-frequency current by using 0.8-1.2A current for 10-40S, welding the upper layer air bag and the lower layer air bag together except for an air bag monomer, an air inlet channel and an air bag channel through high-frequency processing to form a sealed edge connecting part, and removing the master die and the flat die after cooling to obtain the air bag embryo.
2. The method for preparing the TPU air bag capable of preventing leakage according to claim 1, which is characterized in that: the specific operation of the second step is as follows: and loading the surface layer material or the bottom layer material into a supporting frame, flattening, installing a required shape mold on a high-frequency machine, placing the supporting frame on a hot melting platform of the high-frequency machine, starting the high-frequency machine to carry out hot press molding on the surface layer material or the bottom layer material, and obtaining the upper layer air bag or the lower layer air bag.
3. The method for preparing the TPU air bag capable of preventing leakage according to claim 1, which is characterized in that: the specific operation of the second step is as follows: after fixing the surface layer material or the bottom layer material by using a jig, placing the surface layer material or the bottom layer material into an oven with the temperature of 130-180 ℃ for heating and softening for 30-60S, and then placing the softened surface layer material or the softened bottom layer material into a die of a plastic sucking machine to form an upper layer air bag or a lower layer air bag under the vacuum negative pressure condition.
4. The method for preparing the TPU air bag capable of preventing leakage according to claim 1, which is characterized in that: the specific operation of the second step is as follows: fixing the surface layer material or the bottom layer material by using a jig, heating and softening the surface layer material or the bottom layer material in an oven with the temperature of 130-180 ℃ for 30-60S, placing the softened surface layer material or the softened bottom layer material on a forming operation table, applying pressure by using a cold press die to perform die casting forming, wherein the pressure is 5-20 kg/square meter, the time is 30-60S, and demoulding to obtain the upper layer air bag or the lower layer air bag.
5. The method for preparing the TPU air bag capable of preventing leakage according to claim 1, which is characterized in that: the specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel for charging, a plurality of air bag monomers communicated with the air inlet channel are fixed by adopting a first edge sealing die, the air inlet channel is sealed and blocked by adopting a high-frequency machine, all air bag monomers are fixed by adopting a second edge sealing die, and the air inlet channel and the air bag channels are sealed and blocked by adopting the high-frequency machine, so that all air bag monomers of the air bags are mutually independent.
6. The method for preparing the TPU air bag capable of preventing leakage according to claim 1, which is characterized in that: the specific operation of the fourth step is as follows: after the charging connector of the charging device is inserted into the air inlet channel for charging, all the air bag monomers are fixed by adopting the second edge sealing die, and the air inlet channel and the air bag channels are sealed and separated by the high-frequency machine, so that all the air bag monomers of the air bag are mutually independent.
7. An air leakage-proof TPU airbag, which is characterized in that: the airbag is made by the process for making a gas-tight TPU airbag as defined in any one of claims 1-6.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108313519A (en) * | 2018-03-21 | 2018-07-24 | 东莞市中鼎塑料制品有限公司 | One kind is exempted to inflate bilateral air bag and preparation method thereof |
| CN109760323A (en) * | 2019-01-22 | 2019-05-17 | 东莞市厚街宝智鞋材厂 | A kind of insole and its manufacture craft of double-sides belt independent air bags |
| CN110901113A (en) * | 2019-03-21 | 2020-03-24 | 东莞市佳栓实业有限公司 | Production process of antigravity balance massage type buffering convection air bag and air bag cushion |
| CN110897296A (en) * | 2019-12-19 | 2020-03-24 | 惠州宏丰科技发展有限公司 | High-buffer strap, backpack and strap production process |
| CN212530438U (en) * | 2020-04-05 | 2021-02-12 | 胡吉万 | Air bag type box board |
| CN217478010U (en) * | 2022-04-06 | 2022-09-23 | 广东中鼎科技发展有限公司 | TPU air sac embryo and air sac |
-
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108313519A (en) * | 2018-03-21 | 2018-07-24 | 东莞市中鼎塑料制品有限公司 | One kind is exempted to inflate bilateral air bag and preparation method thereof |
| CN109760323A (en) * | 2019-01-22 | 2019-05-17 | 东莞市厚街宝智鞋材厂 | A kind of insole and its manufacture craft of double-sides belt independent air bags |
| CN110901113A (en) * | 2019-03-21 | 2020-03-24 | 东莞市佳栓实业有限公司 | Production process of antigravity balance massage type buffering convection air bag and air bag cushion |
| CN110897296A (en) * | 2019-12-19 | 2020-03-24 | 惠州宏丰科技发展有限公司 | High-buffer strap, backpack and strap production process |
| CN212530438U (en) * | 2020-04-05 | 2021-02-12 | 胡吉万 | Air bag type box board |
| CN217478010U (en) * | 2022-04-06 | 2022-09-23 | 广东中鼎科技发展有限公司 | TPU air sac embryo and air sac |
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