CN109820649A - Seal pressure device and technique - Google Patents
Seal pressure device and technique Download PDFInfo
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- CN109820649A CN109820649A CN201910231274.4A CN201910231274A CN109820649A CN 109820649 A CN109820649 A CN 109820649A CN 201910231274 A CN201910231274 A CN 201910231274A CN 109820649 A CN109820649 A CN 109820649A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000010030 laminating Methods 0.000 claims abstract description 23
- 238000001727 in vivo Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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Abstract
The present invention relates to a kind of heat-sealing pressure device and techniques, wherein, the heat-sealing pressure device includes heating mechanism and laminating mechanism, the heating mechanism includes mounting base, drum body and air-supply assembly, the bulging body is rotatably installed in the mounting base by drive shaft, and the bulging body is circumferentially with several relieve heat holes；The air-supply assembly is used to convey thermal current in vivo to the drum, which blows out via the relieve heat hole to heat to the material for being coated on the bulging external surface；The laminating mechanism is set to the outside of the bulging body, for carrying out envelope pressure to the material after heating.Heat-sealing pressure device structure of the invention is simple, and cost is relatively low, and reliable envelope pressure can be realized under the conditions of lesser pressure and temperature by the cooperation of heating mechanism and laminating mechanism.
Description
Technical field
The present invention relates to amenities production equipment fields, more particularly to a kind of heat-sealing pressure device and technique.
Background technique
Existing drawing is drawn in trousers production equipment, is sealed and is pressed mainly by ultrasonic wave to the envelope pressure of waistline position, envelope presses technique one
As be first to be heated to the envelope pressure head of ultrasonic wave envelope pressure, then allow envelope pressure head and waistline material, make material envelope pressure, in ultrasound
During wave envelope pressure, needs to apply biggish pressure and temperature to material, just can guarantee the effect of envelope pressure.And above-mentioned envelope presses through
Journey need to use ultrasonic wave envelope pressure equipment, higher cost, and sealing batten need to be made using special tool steel, processing trouble, the process-cycle
It is long, manufacturing cost is further increased, causes to draw the production cost of trousers higher.
Summary of the invention
Based on this, it is necessary to for traditional ultrasonic wave envelope pressure high process cost, and need to apply material biggish
Pressure and temperature just can guarantee the problem of envelope pressure effect, provide a kind of heat-sealing pressure device and technique.
A kind of heat-sealing pressure device, including heating mechanism and laminating mechanism, the heating mechanism include mounting base, drum body and send
Wind component, the bulging body are rotatably installed in the mounting base by drive shaft, and the bulging body is circumferentially with several dissipate
Air holes；The air-supply assembly is used to convey thermal current in vivo to the drum, which blows out via the relieve heat hole to packet
The material for being overlying on the bulging external surface is heated；The laminating mechanism is set to the outside of the bulging body, after to heating
Material carry out envelope pressure.
The specific work process of above-mentioned heat-sealing pressure device is as follows: drum body is fixed on board by mounting base, and drum body
It can be rotated under the drive of drive shaft, bulging external surface can be coated on when the waistline material wait seal pressure is delivered to bulging body and with drum
Body rotation；Thermal current is delivered to drum in vivo by air-supply assembly, and then thermal current can be blown out from the relieve heat hole on drum body, to cladding
It is heated in the waistline material of drum external surface；Finally again by laminating mechanism to needing the position for sealing pressure to carry out envelope pressure, such as
This, can realize reliable envelope Compressive Strength under lesser pressure demand and lower temperature.Heat-sealing pressure device structure of the invention
Simply, cost is relatively low, can be realized under the conditions of lesser pressure and temperature reliably by the cooperation of heating mechanism and laminating mechanism
Envelope pressure.
The mounting base includes mounting plate and sleeve in one of the embodiments, and the mounting plate is used for solid with board
Fixed, the sleeve is fixed on the mounting plate, and the drive shaft is rotationally inserted in the sleeve, the drive shaft
One end is pierced by the sleeve and the mounting plate to connect with driving device, the other end of the drive shaft be pierced by the sleeve with
It is fixedly connected with the bulging body.
The mounting plate is adjustably fixed on the board by the first fastener in one of the embodiments,
The mounting plate is equipped with the first strip-shaped hole with first appended claims；The periphery of the sleeve is equipped with flange, described
Flange is adjustably fixed on the mounting plate by the second fastener, and the flange is equipped with matches with second fastener
The second strip-shaped hole closed.
The bulging body is close to the one side of the mounting plate in open setting, the air-supply group in one of the embodiments,
Part includes hot air generator and outlet housing, and the outlet housing is fixed on the periphery of the sleeve and to be contained in the drum internal,
The outlet housing is equipped with air inlet and air outlet, and the air inlet is connected with the outlet air end of the hot air generator, described
Air outlet is opposite with the relieve heat hole and is connected to.
The outlet housing is rotationally sheathed on the sleeve in one of the embodiments, when turning to preset angle
After degree, the outlet housing is locked by third fastener on the sleeve.
It is connected between the air inlet and the hot air generator by inlet suction port in one of the embodiments,
Logical, the inlet suction port is equipped with flow control valve.
The cylindrical setting of bulging body, the outer rim of the air outlet and the drum are internal in one of the embodiments,
Gap α is formed between circumferential surface, wherein 0.05mm≤α≤1.5mm.
The outer rim of the air outlet is equipped with flexible sealing edge in one of the embodiments,.
The laminating mechanism includes mounting rack, cylinder, attachment base and nip rolls, the gas in one of the embodiments,
Cylinder is fixed on the mounting rack, and the piston rod end of the cylinder is fixed with the attachment base, and the nip rolls is rotationally
It is installed on the attachment base, the cylinder drives the attachment base movement, to drive the nip rolls to being coated on the drum
The material of external surface carries out envelope pressure.
A kind of heat-sealing pressure technique is included the following steps: based on heat-sealing pressure device as described above
The outer surface of the bulging body is coated on the rotation of drum body wait seal pressure material；
Thermal current is delivered to the internal portion of the drum by air-supply assembly, and the thermal current in the internal portion of drum is blown via relieve heat hole
Out, to be heated to described wait seal pressure material；
Laminating mechanism carries out envelope pressure wait seal pressure material to described in after heating.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that pressure device is sealed described in one embodiment of the invention；
Fig. 2 is the side schematic view of the heat-sealing pressure device in Fig. 1；
Fig. 3 is the decomposition texture schematic diagram of the heat-sealing pressure device in Fig. 1；
Fig. 4 is the process flow chart that heat-sealing pressure is carried out using the heat-sealing pressure device of Fig. 1.
10, heating mechanism, 11, mounting base, 111, mounting plate, the 1111, first strip-shaped hole, 112, sleeve, 1121, bearing
Chamber, 1122, flange, the 1123, second strip-shaped hole, 12, drum body, 121, relieve heat hole, 13, outlet housing, 14, inlet suction port, 15, flow
Regulating valve, 16, fixation clip, 17, drive shaft, 171, first bearing, 20, laminating mechanism, 21, mounting rack, 22, cylinder, 23, company
Joint chair, 231, bottom plate, 232, side plate, 24, nip rolls, 241, shaft, 242, second bearing, 25, control valve.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.Heretofore described " first ", " second ", " third " do not represent specific quantity and sequence, only
Differentiation for title.
Please refer to Fig. 1 and Fig. 2, a kind of heat-sealing pressure device includes heating mechanism 10 and laminating mechanism 20, and heating mechanism 10 is wrapped
Mounting base 11, drum body 12 and air-supply assembly are included, drum body 12 is rotatably installed in mounting base 11 by drive shaft 17, drum body 12
Be circumferentially with several relieve heat holes 121；Air-supply assembly is used to convey thermal current into drum body 12, and the thermal current is via relieve heat hole
121 blowouts are to heat the material for being coated on bulging 12 outer surface of body；Laminating mechanism 20 be set to drum body 12 outside, for pair
Material after heating carries out envelope pressure.
The specific work process of above-mentioned heat-sealing pressure device is as follows: drum body 12 is fixed on board by mounting base 11, and
Drum body 12 can rotate under the drive of drive shaft 17, and bulging body 12 can be coated on when the waistline material wait seal pressure is delivered to bulging body 12
Outer surface is simultaneously rotated with drum body 12；Thermal current is delivered in bulging body 12 by air-supply assembly, and then thermal current can be from drum body 12
Relieve heat hole 121 is blown out, to heat to the waistline material for being coated on bulging 12 outer surface of body；It is finally right by laminating mechanism 20 again
The position for needing to seal pressure carries out envelope pressure, in this way, reliable envelope pressure can be realized under lesser pressure demand and lower temperature
Degree.Heat-sealing pressure device structure of the invention is simple, and cost is relatively low, by the cooperation of heating mechanism 10 and laminating mechanism 20 can compared with
Reliable envelope pressure is realized under the conditions of small pressure and temperature.
In one of the embodiments, referring to figure 3., mounting base 11 includes mounting plate 111 and sleeve 112, mounting plate 111
For fixing with board, sleeve 112 is fixed on mounting plate 111, and drive shaft 17 is rotationally inserted in sleeve 112, driving
One end of axis 17 is pierced by sleeve 112 and mounting plate 111 to connect with driving device, and the other end of drive shaft 17 is pierced by sleeve 112
To be fixedly connected with drum body 12.When work, drive shaft 17 is driven to rotate by driving device, and then bulging body 12 can be driven to rotate,
Waistline material is coated on bulging 12 surface of body and can rotate with drum body 12, and the thermal current inside drum body 12 can be dissipated from drum body 12 is circumferential
Air holes 121 uniformly discharges, to heat to waistline material.Wherein, driving device can be motor, the output shaft of motor and driving
It is connected between axis 17 by shaft coupling.
Further, the end of sleeve 112 is equipped with bearing bore 1121, is arranged with first bearing 171 in drive shaft 17, and first
Bearing 171 is contained in bearing bore 1121.Specifically, the outer ring of first bearing 171 is mounted on the bearing bore 1121 of sleeve 112
Interior, drive shaft 17 is inserted into the inner ring of first bearing 171, by being equipped with first bearing between drive shaft 17 and sleeve 112
171, it is ensured that the rotation of drive shaft 17 is more smoothly, to guarantee that the heating process of entire heating mechanism 10 is more smoothly.
Further, mounting plate 111 is adjustably fixed on board by the first fastener, and mounting plate 111 is equipped with
With the first strip-shaped hole 1111 of the first appended claims；The periphery of sleeve 112 is equipped with flange 1122, and flange 1122 is tight by second
Firmware is adjustably fixed on mounting plate 111, and flange 1122 is equipped with the second strip-shaped hole 1123 with the second appended claims.
Installation site of the mounting plate 111 on board can be adjusted by the first fastener and the cooperation of the first strip-shaped hole 1111,
Position of the drum body 12 on mounting plate 111 can be adjusted by the second fastener and the cooperation of the second strip-shaped hole 1123, from
And be convenient to that body 12 will be roused and be adjusted to suitable operating position, to meet integral layout requirement.
Specifically, the first fastener and the second fastener can be used bolt and adjust the form of bolt block cooperation, and first
Strip-shaped hole 1111 is vertically extending, 1123 horizontal extension of the second strip-shaped hole.The first fastener is turned, by mounting plate 111 along first
Shape hole 1111 is mobile, can the installation site of vertical direction is adjusted on board to mounting plate 111；Turn the second fastening
Part moves sleeve 112 along the second strip-shaped hole 1123, can to sleeve 112 and drum the installation site in the horizontal direction of body 12 into
Row is adjusted, and overall structure is simple, and flexible adjustment is high.
Further, for drum body 12 close to the one side of mounting plate 111 in open setting, air-supply assembly includes hot air generator
And outlet housing 13, outlet housing 13 are fixed on the periphery of sleeve 112 and are contained in bulging body 12, outlet housing 13 be equipped with air inlet and
Air outlet, air inlet are connected with the outlet air end of hot air generator, and air outlet is opposite with relieve heat hole 121 and is connected to.Specifically,
Hot air generator is for after heating air and exporting to provide thermal current, hot air generator concretely hot-air blower.
When work, the thermal current that hot air generator generates enters in outlet housing 13 via air inlet, then exports via air outlet, finally
It is released by the relieve heat hole 121 on drum body 12.By be arranged outlet housing 13 thermal current can be concentrated on one it is relatively small
It is discharged again in region, to can avoid not can guarantee heating temperature because of heat loss in transmission process.
Further, outlet housing 13 is rotationally sheathed on sleeve 112, after turning to predetermined angle, outlet housing 13
It is locked by third fastener on sleeve 112.Third fastener concretely screw, bolt or bolt etc..It is heating
In the process, if discovery heating region it is undesirable, only third fastener need to be unclamped, by outlet housing 13 rotate predetermined angle with
By the specified heating region of air outlet alignment, then tighten third fastener, by outlet housing 13 be locked on sleeve 112 i.e.
Can, it is simple to operate, convenient for being adjusted to heating region.
Further, it is connected between air inlet and hot air generator by inlet suction port 14, is set on inlet suction port 14
There is flow control valve 15.By the way that flow control valve 15 is arranged, air pressure size can be adjusted according to the demand of product.When in heating process
It was found that when heating temperature is undesirable, it can be by adjusting flow control valve 15, to change the air inflow of thermal current, so as to right
The heating temperature of material is adjusted, and wherein manual modulation valve or automatic regulating valve can be used in flow control valve 15.
Further, the drum cylindrical setting of body 12 is formed with gap between the outer rim and drum 12 inner peripheral surface of body of air outlet
α, wherein 0.05mm≤α≤1.5mm.In drum 12 rotation process of body, if gap α is too small, outlet housing 13 and drum body 12 can be made
Between interfere, if gap is excessive, will affect air-tightness so that thermal current loss it is larger, influence heating effect.By gap α
Be arranged between 0.05mm-1.5mm can guarantee drum body 12 rotation without interference and air-tightness it is good.Preferably, outlet housing 13 is hanging down
Directly in the axial fan-shaped setting in cross section of drive shaft 17, air outlet has outside the arc being adapted to the inner peripheral surface of drum body 12
The gap α of the inner peripheral surface of edge, arcing outer edges and drum body 12 is 1mm.
Further, the outer rim of air outlet is equipped with flexible sealing edge.By the outer rim in air outlet, flexible sealing edge is set,
It can be under the premise of not interfering bulging body 12 to rotate, by the clearance seal between outlet housing 13 and drum body 12, to guarantee good gas
Close property.Wherein, flexible sealing edge can be wool felt, sponge etc..In this way, even if drum body 12 is in the state of high-speed rotation, according to
It so can guarantee good air-tightness.
Further, outlet housing 13 is equipped with fixation clip 16, and flexible sealing material is fixed on outlet air by fixation clip 16
To form flexible sealing edge at the outer rim of mouth.Specifically, fixation clip 16 includes the end surface press plate set on 13 end face of outlet housing, with
And the side pressing plate set on 13 side of outlet housing, the shape of end surface press plate and side pressing plate can be set according to the outer edge contour of air outlet
Set arc-shaped or linear.
Further, laminating mechanism 20 includes mounting rack 21, cylinder 22, attachment base 23 and nip rolls 24, and cylinder 22 is fixed
In on mounting rack 21, the piston rod end of cylinder 22 is fixed with attachment base 23, and nip rolls 24 is rotatably installed on attachment base 23
On, cylinder 22 is drivingly connected seat 23 and moves, to drive nip rolls 24 to carry out envelope pressure to the material for being coated on bulging 12 outer surface of body.Tool
Body, attachment base 23 includes that bottom plate 231 and two side plates 232 set on 231 opposite sides of bottom plate, nip rolls 24 pass through shaft
241 are rotatably installed between both side plate 232, and second bearing 242 is additionally provided between shaft 241 and nip rolls 24.Material packet
It being overlying on bulging 12 surface of body and is heated, when the material after heating is by rousing the laminating mechanism 20 on the outside of body 12, cylinder 22 is acted,
The piston rod of cylinder 22 drives attachment base 23 and nip rolls 24 to move towards drum body 12, pushes down the material being heated, makes material pressure
Close envelope.By the cooperation of heating mechanism 10 and laminating mechanism 20, so that entirely the movement of heat-sealing bonding processes is coherent, can effectively mention
Rise production efficiency.
Further, laminating mechanism 20 further includes the control valve 25 on mounting rack 21, and control valve 25 is used for cylinder
22 working condition is controlled.Wherein, control valve 25 can be hand-operated valve, in order to which operator carries out the movement of cylinder 22
Control.
Referring to figure 4., it is based on above-mentioned heat-sealing pressure device, the present invention also proposes a kind of heat-sealing pressure technique, includes the following steps:
The outer surface of the bulging body is coated on the rotation of drum body wait seal pressure material；Thermal current is delivered to the drum by air-supply assembly
The thermal current in internal portion, the internal portion of drum is blown out via relieve heat hole, to heat to described wait seal pressure material；Laminating mechanism
Envelope pressure is carried out wait seal pressure material to described in after heating.Press technique can be in lesser pressure demand and lower by above-mentioned heat-sealing
At a temperature of realize reliable envelope Compressive Strength.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of heat-sealing pressure device, which is characterized in that including heating mechanism and laminating mechanism, the heating mechanism includes installation
Seat, drum body and air-supply assembly, the bulging body are rotatably installed in the mounting base by drive shaft, the circumferential direction of the bulging body
Equipped with several relieve heat holes；The air-supply assembly is used to convey thermal current in vivo to the drum, and the thermal current is via the relieve heat hole
Blowout is to heat the material for being coated on the bulging external surface；The laminating mechanism is set to the outside of the bulging body, uses
In carrying out envelope pressure to the material after heating.
2. heat-sealing pressure device according to claim 1, which is characterized in that the mounting base includes mounting plate and sleeve, institute
Mounting plate is stated for fixing with board, the sleeve is fixed on the mounting plate, and the drive shaft is rotationally inserted in institute
It states in sleeve, one end of the drive shaft is pierced by the sleeve and the mounting plate to connect with driving device, the drive shaft
The other end be pierced by the sleeve to be fixedly connected with the bulging body.
3. heat-sealing pressure device according to claim 2, which is characterized in that the mounting plate is adjustable by the first fastener
Ground is fixed on the board, and the mounting plate is equipped with the first strip-shaped hole with first appended claims；The sleeve
Periphery be equipped with flange, the flange is adjustably fixed on the mounting plate by the second fastener, is set on the flange
There is the second strip-shaped hole with second appended claims.
4. heat-sealing pressure device according to claim 2, which is characterized in that the bulging body is in close to the one side of the mounting plate
Opening setting, the air-supply assembly includes hot air generator and outlet housing, the outlet housing be fixed on the sleeve periphery,
And it is internal to be contained in the drum, the outlet housing is equipped with air inlet and air outlet, the air inlet and the hot air generator
Outlet air end be connected, the air outlet is opposite with the relieve heat hole and is connected to.
5. heat-sealing pressure device according to claim 4, which is characterized in that the outlet housing is rotationally sheathed on the set
On cylinder, after turning to predetermined angle, the outlet housing is locked by third fastener on the sleeve.
6. heat-sealing pressure device according to claim 4, which is characterized in that the air inlet and the hot air generator it
Between be connected by inlet suction port, the inlet suction port be equipped with flow control valve.
7. heat-sealing pressure device according to claim 6, which is characterized in that the bulging cylindrical setting of body, the outlet air
Gap α is formed between the outer rim and the internal circumferential surface of the drum of mouth, wherein 0.05mm≤α≤1.5mm.
8. heat-sealing pressure device according to claim 7, which is characterized in that the outer rim of the air outlet is equipped with flexible sealing
Side.
9. according to claim 1 to heat-sealing pressure device described in 8 any one, which is characterized in that the laminating mechanism includes peace
Shelve, cylinder, attachment base and nip rolls, the cylinder are fixed on the mounting rack, the piston rod end of the cylinder is fixed
There is the attachment base, the nip rolls is rotatably installed on the attachment base, and the cylinder drives the attachment base movement,
To drive the nip rolls to carry out envelope pressure to the material for being coated on the bulging external surface.
10. a kind of heat-sealing pressure technique is based on heat-sealing pressure device as claimed in any one of claims 1 to 9, which is characterized in that
Include the following steps:
The outer surface of the bulging body is coated on the rotation of drum body wait seal pressure material；
Thermal current is delivered to the internal portion of the drum by air-supply assembly, and the thermal current in the internal portion of drum is blown out via relieve heat hole, with
It is heated to described wait seal pressure material；
Laminating mechanism carries out envelope pressure wait seal pressure material to described in after heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910231274.4A CN109820649A (en) | 2019-03-26 | 2019-03-26 | Seal pressure device and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910231274.4A CN109820649A (en) | 2019-03-26 | 2019-03-26 | Seal pressure device and technique |
Publications (1)
| Publication Number | Publication Date |
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| CN109820649A true CN109820649A (en) | 2019-05-31 |
Family
ID=66872135
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910231274.4A Pending CN109820649A (en) | 2019-03-26 | 2019-03-26 | Seal pressure device and technique |
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| CN (1) | CN109820649A (en) |
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| CN208616261U (en) * | 2018-05-04 | 2019-03-19 | 洪飞飞 | A kind of single-chamber vacuum packaging machine |
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| CN205167677U (en) * | 2015-12-08 | 2016-04-20 | 江苏英普科电子材料有限公司 | System bag machine heat -seal press roller assembly |
| CN105398185A (en) * | 2015-12-28 | 2016-03-16 | 广州市兴世机械制造有限公司 | Sealing and laminating method and apparatus for multilayer sheet |
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