CN111546618B

CN111546618B - Forming jig and thermoplastic forming device

Info

Publication number: CN111546618B
Application number: CN202010381471.7A
Authority: CN
Inventors: 张惟程; 许雅筑; 温文懋
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2022-04-15
Anticipated expiration: 2040-05-08
Also published as: CN111546618A

Abstract

The invention relates to a forming jig and a thermoplastic forming device, wherein the forming jig is applied to a thermoplastic film pasting process, the upper surface of the forming jig is provided with a platform part, a curved surface bearing part, a slope transition part and a first exhaust port, the curved surface bearing part is used for bearing an object to be pasted, the platform part surrounds the curved surface bearing part, the slope transition part is positioned between the platform part and the curved surface bearing part, and the first exhaust port is positioned in the slope transition part; an exhaust duct communicated with the first exhaust port is arranged in the forming jig. According to the forming jig and the thermoplastic forming device, the slope transition part is arranged between the platform part and the curved surface bearing part of the forming jig, and the first exhaust port is arranged on the slope transition part instead of the platform part, so that the problem that the exhaust port is blocked when a film contacts the platform part in the film pasting process can be solved, and the problem that the attached bubbles cannot be exhausted can be solved.

Description

Forming jig and thermoplastic forming device

Technical Field

The invention relates to the technical field of thermal forming equipment, in particular to a forming jig and a thermal forming device.

Background

With the gradual deepening of technology and living application, the original design aesthetic requirements for living application are gradually transferred to electronic technology products, especially, a human-computer interface interacting with equipment is more obvious after the touch application is introduced, and touch becomes a mainstream technology of the human-computer interface. In recent years, curved screen design has been emphasized, the requirements of curved display and curved touch application are more and more common, the configuration design required by 3C technology will not be limited, and touch panels with any curved shape are more and more common, such as wearable products, vehicle-mounted products, household appliances …, and the like. Therefore, the forming and film material attaching technology of the curved surface touch panel is increasingly applied. However, bubbles are easily generated when the film material is attached to the surface of the curved surface product.

Disclosure of Invention

Therefore, it is necessary to provide a forming jig and a thermoplastic forming apparatus for solving the problem that bubbles are easily generated when a film material is attached to the surface of a curved product.

The forming jig is applied to the thermoplastic film pasting process, a platform part, a curved surface bearing part, a slope transition part and a first exhaust port are arranged on the upper surface of the forming jig, the curved surface bearing part is used for bearing an object to be pasted, the platform part surrounds the curved surface bearing part, the slope transition part is located between the platform part and the curved surface bearing part, and the first exhaust port is located in the slope transition part; and an exhaust duct communicated with the first exhaust port is arranged in the forming jig.

In one embodiment, an included angle between the exhaust duct and the platform portion is an acute angle; the forming jig further comprises a lower surface opposite to the upper surface, an exhaust groove is formed in the lower surface and communicated with the exhaust duct, and the exhaust groove is used for intensively exhausting gas in the thermoplastic film pasting process.

In one embodiment, the exhaust groove comprises a first end and a second end which are oppositely arranged, the first end is close to the edge of the lower surface of the forming jig, the second end is away from the edge of the lower surface of the forming jig, and the exhaust duct is communicated with the exhaust groove through the first end of the exhaust groove.

In one embodiment, the number of the first exhaust ports, the number of the exhaust ducts and the number of the exhaust grooves are equal to one another, and the first exhaust ports are uniformly distributed on the periphery of the slope transition part; one end of each exhaust duct is communicated with a first exhaust port, and the other end is communicated with an exhaust groove.

In one embodiment, the upper surface of the forming jig is further provided with a second air outlet, the second air outlet is arranged at the edge of the platform part close to the slope transition part, the second air outlet is communicated with the air exhaust duct, and the second air outlet is used for adsorbing and fixing the position of the membrane material in the thermoplastic membrane pasting process.

In one embodiment, the minimum distance between the second exhaust port and the ramp transition is D1, 0 < D1＜2mm。

In one embodiment, the curved bearing part is recessed in the upper surface of the forming jig to form a containing cavity for containing the attached object; the forming jig comprises a cover body and a body, the curved surface bearing part is positioned on the body, and the accommodating cavity and the exhaust duct are formed in the body; the lid corresponds the position in holding chamber and has been seted up the lid and has been closed the mouth, platform portion, slope transition portion, first exhaust port all are located the lid, the position that the body corresponds first exhaust port is provided with the third exhaust port, the third exhaust port is linked together with first exhaust port, first exhaust port pass through the third exhaust port with exhaust duct is linked together.

In one embodiment, the side wall of the cover opening is the slope transition part, the slope transition part is chamfered into an arc curved surface, the first exhaust port is arranged on the arc curved surface, the radius of the arc curved surface is R, and R is larger than 2 mm; the edge that the platform portion of lid is close to slope transition portion is provided with the second gas vent, the body corresponds the position of second gas vent is provided with the fourth gas vent, the second gas vent pass through the fourth gas port with the exhaust duct is linked together.

In one embodiment, the minimum inner diameter of the cover closing opening is D2, the maximum opening inner diameter of the accommodating cavity is D3, D3 is greater than D2, so that the cover body protrudes out of the accommodating cavity to form a protrusion, and the width of the protrusion is M, M = (D3-D2)/2; the thickness of the object to be pasted is D4, and M is more than D4.

The invention also provides a thermoplastic molding device, which comprises a heating element and any one of the molding jigs, wherein the first exhaust ports are uniformly distributed on the periphery of the slope transition part, and the heating element is used for heating and pressurizing the film material so as to attach the film material to the attached object.

The forming jig and the thermoplastic forming device have the beneficial effects that:

according to the forming jig and the thermoplastic forming device, the slope transition part is arranged between the platform part and the curved surface bearing part of the forming jig, and the first exhaust port is arranged on the slope transition part instead of the platform part, so that the problem that the exhaust port is blocked when a film contacts the platform part in the film pasting process can be solved, and the problem that the attached bubbles cannot be exhausted can be solved.

Drawings

Fig. 1 is a schematic structural diagram of a film material coated with an adhesive layer according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a film material attached to an adherend by a thermoforming apparatus according to an embodiment of the present invention.

FIG. 3 is a schematic view of a thermoplastic molding apparatus according to an embodiment of the present invention after being demolded.

Fig. 4 is a schematic perspective view of a molding jig according to an embodiment of the present invention.

Fig. 5 is a longitudinal sectional view of a molding jig according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a lower surface of a molding jig according to an embodiment of the present invention.

Fig. 7 is an exploded view of a molding tool according to another embodiment of the present invention.

Fig. 8 is a schematic structural view of a molding tool according to another embodiment of the present invention after a cover and a body are connected.

Fig. 9 is a longitudinal sectional view of a molding jig according to another embodiment of the present invention.

Reference numerals:

a heating member 100; the forming jig comprises a forming jig 200, a curved bearing part 210, an accommodating cavity 211, a platform part 220, a slope transition part 230, a first exhaust port 231, an exhaust duct 232, an exhaust groove 233, a first end 234, a second end 235 and a second exhaust port 221; the cover 240, the protrusion 241, the cover opening 242, the body 250, the third exhaust opening 251, the fourth exhaust opening 252, and the accommodating groove 253; the film material 300, the adhesive layer 400 and the object 500.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. In addition, it should be noted that, in the sectional views in the drawings herein, the section lines are provided for more clearly illustrating the specific structure of the embodiments of the present invention, the same section lines schematically represent the same component or represent different components made of the same material, and the shapes of the section lines, including the inclination angle and the spacing distance, do not strictly follow the section lines set on different materials in the mechanical drawing. For example, in the drawings herein, the hatching inclined at 45 ° does not necessarily represent a metal material, but may represent other non-metal materials.

In order to solve the above problems, the present invention provides a molding jig 200 and a thermoplastic molding device, wherein the thermoplastic molding device has a structure as shown in fig. 2, and includes a heating element 100 and the molding jig 200, the molding jig 200 is used for carrying an object 500 to be attached, the heating element 100 is used for fixing a film material 300, and heating and pressurizing the film material 300, so as to shape the film material 300 and attach the film material to the object 500 to be attached. The above-mentioned method of attaching the film material 300 to the adherend 500 by heating and pressing is simply referred to as a thermoplastic film attaching process.

In one embodiment, the thermoplastic film process is as shown in fig. 1-3, first coating a layer of adhesive 400 on the film 300, and in a specific embodiment, the layer of adhesive 400 may be a transparent optical adhesive layer. The side of the film 300 facing away from the adhesive bond line 400 is then secured to the heating element 100, as shown in fig. 2. In a specific embodiment, the heating element 100 is a heating plate or an infrared heating element 100, the heating element 100 is provided with air holes (not shown in the figure), the air holes are connected with a vacuum extractor, the film material 300 is adsorbed on the heating element 100, and the heating element 100 heats the film material 300, so that the film material 300 can be deformed under the action of air pressure. Then the air hole is connected with an air pressure device, the heating element 100 blows air downwards to the membrane material 300, the membrane material 300 is pressurized through the air, the membrane material 300 is attached to the attached object 500, then the mold is released, and the heating element 100 and the forming jig 200 are removed from the membrane material 300 and the attached object 500 as shown in fig. 3. The forming jig 200 is further provided with an exhaust duct, and when the heating element 100 pressurizes the film material 300 by gas, the exhaust duct can exhaust the gas in the bonding process.

In order to better exhaust the gas during the attaching process, in one embodiment, the structure of the forming jig 200 is shown in fig. 4 to 7, wherein fig. 4 is a schematic perspective structure view of the forming jig 200, fig. 5 is a cross-sectional view of a longitudinal section of the forming jig 200, and fig. 6 is a schematic lower surface structure view of the forming jig 200. As shown in fig. 4, the upper surface of the forming fixture 200 is provided with a curved surface bearing portion 210, a platform portion 220, a slope transition portion 230 and a first exhaust port 231, the curved surface bearing portion 210 is used for bearing an adherend, the curved surface bearing portion 210 is recessed in the upper surface of the forming fixture 200 to form an accommodating cavity 211 for accommodating and bearing the adherend 500, the platform portion 220 surrounds the curved surface bearing portion 210, the slope transition portion 230 is located between the platform portion 220 and the curved surface bearing portion 210, and the first exhaust port 231 is located in the slope transition portion 230. As shown in fig. 5, an exhaust duct 232 communicated with the first exhaust port 231 is disposed in the forming fixture 200, and an included angle between the exhaust duct 232 and the platform portion 220 is an acute angle, that is, the exhaust duct 232 is disposed obliquely with respect to the upper surface of the forming fixture 200. The forming jig 200 further comprises a lower surface opposite to the upper surface, the lower surface is provided with an exhaust groove 233, the exhaust groove 233 comprises a first end 234 and a second end 235 which are opposite to each other, the first end 234 is close to the edge of the lower surface of the forming jig 200, the second end 235 is close to the center of the lower surface of the forming jig 200, and the exhaust duct 232 is communicated with the exhaust groove 233 through the first end 234 of the exhaust groove 233.

It should be noted that, in the embodiments shown in fig. 4 to fig. 6, similar to the embodiments shown in fig. 2 and fig. 3, the film 300 needs to be attached to the concave surface of the adherend 500, and correspondingly, the curved bearing portion 210 is concave on the upper surface of the forming fixture 200 to form the receiving cavity 211. It is understood that, in other embodiments, the film material 300 may be attached to the convex surface of the adherend 500, and correspondingly, the curved surface bearing portion 210 needs to protrude from the upper surface of the forming fixture 200. Alternatively, in another embodiment, the film material 300 may be attached to the object 500 in a multi-axis curved surface, and in this case, the shape of the curved surface bearing part 210 needs to be adaptively changed according to the attachment surface of the object 500. In addition, in an embodiment, the film 300 may be a common plastic film, or a functional film including a touch module and/or a flexible display module.

In addition, as shown in fig. 4 to 6, the number of the first exhaust ports 231, the exhaust ducts 232, and the exhaust grooves 233 is equal to two or more, and the first exhaust ports 231 are uniformly distributed around the slope transition portion 230; one end of each exhaust duct 232 is communicated with one first exhaust port 231, the other end is communicated with one exhaust groove 233, the exhaust grooves 233 are radially distributed on the lower surface of the forming jig 200, the first ends 234 of different exhaust grooves 233 are uniformly distributed on the edge of the lower surface of the forming jig 200, and the second ends 235 are centrally distributed in the center of the lower surface of the forming jig 200, so that the exhaust grooves 233 can discharge gas in the thermoplastic film sticking process through the second ends 235 in a centralized manner.

In the thermoplastic film pasting process, the heating element 100 pressurizes the film material 300 by gas, and when the exhaust hole 232 of the molding jig 200 is opened, the first exhaust port 231, the exhaust hole 232 and the exhaust groove 233 are all used for exhausting gas. In the embodiment shown in fig. 4 to 6, the first exhaust port 231 is disposed at the slope transition portion 230 instead of the platform portion 220, so that the problem that the first exhaust port 231 is blocked when the film material 300 contacts the platform portion 220 in the film attaching process can be avoided, and the problem that the attaching air bubbles cannot be discharged can be avoided. In addition, in a specific embodiment, in order to more conveniently dispose the first exhaust port 231 at the ramp transition portion 230, the width of the ramp transition portion 230 may be increased. In addition, in the embodiment shown in fig. 4 to fig. 6, the air discharging hole 232 is designed to extend along the inclined surface of the inclined transition portion 230 to the bottom air discharging hole 232, so that the air discharging port is closer to the edge of the adherend 500, the air discharging hole 232 is ensured to be smooth when the adherend is attached, and the pressurization process is facilitated, so that the air in the accommodating cavity 211 can be discharged along the inclined surface of the inclined transition portion 230.

In addition, in one embodiment, as shown in fig. 4 and 5, the upper surface of the forming fixture 200 is further provided with a second air outlet 221, and the second air outlet 221 is disposed at an edge of the platform part 220 close to the slope transition part 230. As shown in fig. 4, the number of the second exhaust ports 221 is two or more, and the second exhaust ports 221 are uniformly distributed on the outer periphery of the first exhaust port 231, and the second exhaust ports 221 communicate with the exhaust duct 232, so that the second exhaust ports 221 can assist the first exhaust port 231 in exhausting air. In addition, in the thermoplastic bonding process, when the exhaust hole 232 is opened, the second exhaust port 221 can generate a downward suction force on the film material 300, so that the position of the film material 300 can be sucked and fixed. Additionally, in particular embodiments, the minimum distance between the second exhaust port 221 and the ramp transition 230 is D1, 0 < D1＜2 mm. When the minimum distance D1 between the second gas outlet 221 and the slope transition 230 is greater than 10mm, although the second gas outlet 221 can fix the position of the film material 300 by suction, since the minimum distance D1 between the second gas outlet 221 and the slope transition 230 is too large, the gas discharge path is lengthened, thereby reducing the gas discharge efficiency, resulting in the generation of the bubble entrapment phenomenon.

In addition, in the embodiment shown in fig. 4 to 6, since the first exhaust opening 231 is disposed at the slope transition portion 230, in order to prevent the adherend 500 from blocking the first exhaust opening 231, it is generally necessary to design the depth of the receiving cavity 211 to be greater than the height of the adherend 500, and when the adherend 500 is received in the receiving cavity 211, the top edge of the adherend 500 is lower than the first exhaust opening 231. With such an arrangement, although smooth air discharge can be ensured, the thickness of the adherend 500 itself causes a break, which affects the surface appearance after thermoplastic film application.

In order to solve the above problem, in another embodiment, as shown in fig. 7 to 9, the forming jig 200 includes a cover 240 and a body 250, wherein fig. 7 is a schematic structural view before the cover 240 and the body 250 of the forming jig 200 are connected, fig. 8 is a schematic structural view after the cover 240 and the body 250 of the forming jig 200 are connected, and fig. 9 is a longitudinal sectional view of the forming jig 200. As shown in fig. 7 and 9, the body 250 is provided with a receiving groove 253 for receiving the cover 240. The curved surface bearing part 210 is arranged on the body 250, and the accommodating cavity 211 and the exhaust duct 232 are formed in the body 250; the cover 240 is provided with a cover closing opening 242 corresponding to the position of the accommodating cavity 211, the platform part 220, the slope transition part 230, the first exhaust port 231 and the second exhaust port 221 are all located on the cover 240, the side wall of the cover closing opening 242 is the slope transition part 230, the slope transition part 230 is chamfered to be an arc curved surface, the first exhaust port 231 is arranged on the arc curved surface, the radius of the arc curved surface is R, and R is larger than 2 mm; the second exhaust port 221 is disposed at the edge of the platform part 220 of the cover 240 close to the slope transition part 230, that is, the second exhaust port 221 is disposed at the outer ring of the first exhaust port 231, the body 250 is disposed with a third exhaust port 251 corresponding to the first exhaust port 231, the third exhaust port 251 is communicated with the first exhaust port 231, and the first exhaust port 231 is communicated with the exhaust duct 232 through the third exhaust port 251; the body 250 is provided with a fourth exhaust port 252 at a position corresponding to the second exhaust port 221, and the second exhaust port 221 is communicated with the exhaust duct 232 through the fourth exhaust port.

In addition, as shown in fig. 9, the minimum inner diameter of the upper cover closing opening 242 of the cover 240 is D2, the maximum opening inner diameter of the accommodating cavity 211 of the main body 250 is D3, and D3 is greater than D2, so that the cover 240 protrudes from the accommodating cavity 211 to form a protruding portion 241, and the width of the protruding portion 241 is M, M = (D3-D2)/2. In yet another embodiment, the thickness of the adherend 500 is D4, M＞D4. When M = D4, the inner surface cavity of the adherend 500 is smoothly connected with the slope transition part 230 of the cover 240, so that the problem of step caused by the thickness of the adherend 500 itself can be avoided. When M > D4, be formed with the step between the upper edge of bulge 241 and adherend 500 to in the thermoplastic laminating process, membrane material 300 can not earlier with the marginal contact at holding chamber 211 top, ensure that membrane material 300 is earlier with the bottom laminating of adherend 500, then laminate in proper order from bottom to upper portion, the gas that produces in the laminating process smoothly discharges through first exhaust hole 231 and second exhaust hole 221, makes the bottom can not produce the package bubble phenomenon.

According to the forming jig 200 and the thermoplastic forming device, the slope transition part 230 is arranged between the platform part 220 and the curved surface bearing part 210 of the forming jig 200, and the first exhaust port 231 is arranged on the slope transition part 230 instead of the platform part 220, so that the problem that the first exhaust port 231 is blocked when the film material 300 contacts the platform part 220 in the film pasting process can be avoided, and the problem that the pasted air bubbles cannot be exhausted can be further avoided.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A forming jig is applied to the thermoplastic film pasting process and is characterized in that a platform part, a curved surface bearing part, a slope transition part and a first exhaust port are arranged on the upper surface of the forming jig, the curved surface bearing part is used for bearing a pasted object, the platform part surrounds the curved surface bearing part, the slope transition part is located between the platform part and the curved surface bearing part, and the first exhaust port is located in the slope transition part; an exhaust duct communicated with the first exhaust port is arranged in the forming jig;

the forming jig comprises a cover body and a body;

the body is provided with a containing groove for containing the cover body, the curved surface bearing part is positioned on the body, the curved surface bearing part is sunken on the upper surface of the forming jig to form a containing cavity for containing an object to be stuck, and the exhaust duct is formed in the body; a third exhaust port is arranged at the position of the body corresponding to the first exhaust port, the third exhaust port is communicated with the first exhaust port, and the first exhaust port is communicated with the exhaust duct through the third exhaust port;

the cover body is provided with a cover closing opening corresponding to the accommodating cavity, and the platform part, the slope transition part and the first exhaust port are all positioned on the cover body; the minimum inner diameter of the cover closing opening is D2, the maximum opening inner diameter of the accommodating cavity is D3, D3 is larger than D2, so that the cover body protrudes out of the accommodating cavity to form a protruding part, and the width of the protruding part is M, wherein M = (D3-D2)/2;

the thickness of the adherend is D4, M is more than D4;

the depth of the accommodating cavity is greater than the height of the attached object.

2. The forming jig according to claim 1, wherein an included angle between the exhaust duct and the platform portion is an acute angle; the forming jig further comprises a lower surface opposite to the upper surface, an exhaust groove is formed in the lower surface and communicated with the exhaust duct, and the exhaust groove is used for intensively exhausting gas in the thermoplastic film pasting process.

3. The forming jig of claim 2, wherein the exhaust groove comprises a first end and a second end which are oppositely arranged, the first end is close to the edge of the lower surface of the forming jig, the second end is away from the edge of the lower surface of the forming jig, and the exhaust duct is communicated with the exhaust groove through the first end of the exhaust groove.

4. The forming jig according to claim 2, wherein the number of the first exhaust ports, the number of the exhaust ducts and the number of the exhaust grooves are equal to each other, and the first exhaust ports are uniformly distributed around the slope transition portion; one end of each exhaust duct is communicated with a first exhaust port, and the other end is communicated with an exhaust groove.

5. The forming jig of claim 1, wherein the upper surface of the forming jig is further provided with a second air outlet, the second air outlet is arranged at an edge of the platform portion close to the slope transition portion, the second air outlet is communicated with the air exhaust duct, and the second air outlet is used for adsorbing and fixing the position of the film material in the thermoplastic film pasting process.

6. The molding jig of claim 5, wherein the minimum distance between the second air vent and the ramp transition portion is D1, 0 < D1＜2mm。

7. The forming jig according to claim 1, wherein the side wall of the cover opening is the slope transition portion, the slope transition portion is chamfered to form an arc curved surface, the first exhaust port is disposed on the arc curved surface, and the radius of the arc curved surface is R, R > 2 mm; the edge that the platform portion of lid is close to slope transition portion is provided with the second gas vent, the body corresponds the position of second gas vent is provided with the fourth gas vent, the second gas vent pass through the fourth gas port with the exhaust duct is linked together.

8. A thermoplastic molding device, characterized in that, includes the heating element and the molding tool of any claim 1-7, the said first exhaust port is distributed on the circumference of the said slope transition part evenly, the said heating element is used for heating and pressurizing the membrane, and then laminate the said membrane on the said adherend.