CN110394973A - A kind of veneer laminating structure and method - Google Patents

Abstract

The invention discloses a method for pasting decorative panels, which comprises the following steps: one side of TPU or PVC is pasted with high-temperature-resistant plastic, and the other side of TPU or PVC is pasted with high-temperature hot melt adhesive; Heat-press the high-temperature-resistant plastic, tear off the excess high-temperature hot-melt adhesive to obtain a patterned veneer fit body; place the veneer fit body above the unit to be pasted, align it with the mold, heat the veneer fit body with high frequency, and then hot press The decorative piece is attached to the pasted unit; cool to room temperature, tear off excess high-temperature-resistant plastic, and stick a firm decorative piece to the pasted unit. The decoration structure and method of the present invention are designed scientifically and reasonably, and have the following effects: high temperature resistant film protection, the overall pattern is beautiful, and the decoration piece bonding body does not leave traces on the mold, and can form a more three-dimensional pattern. It can be integrated with most materials, can transition the adhesion of two different materials, improves the bonding firmness, and has wider adaptability.

Description

A kind of veneer laminating structure and method

technical field

The invention relates to the technical field of case and bag manufacturing, in particular to a structure and method for laminating decorations with beautiful patterns, firm and non-falling off, and simple operation.

Background technique

High-frequency waves are high-frequency waves. High-frequency waves refer to electromagnetic waves with a frequency greater than 100Khz. The welding and welding principles of high-frequency waves are also different from ultrasonic waves. High-frequency waves use high-frequency electromagnetic fields to make the internal molecules of materials collide violently with each other to generate high temperatures to achieve the purpose of welding and welding. The ultrasonic wave uses the principle of frictional heat generation to generate a large amount of heat to achieve the purpose of welding and welding. High frequency has a wide range of applications, so there are high frequency plastic welding machines, high frequency leather plastic fuses, high frequency folding box creasing machines, high frequency metal casting machines, high frequency metal heating machines, etc.

In the prior art, the application number is 200920168018.7, which discloses a combined structure of leather and decorative pieces with engraved patterns, which includes: a leather 1 and a plastic decorative piece 3; wherein, the leather 1 has a layer on its surface Thin film 2, generally after the surface of leather 1 is coated with film 2, a layer of brightly colored and glossy leather 1 will be formed, making the leather 1 not easy to stain and easy to maintain, and then the loose tissue on the surface of the leather 1 is lasered The film 2 is removed to form a hollow pattern 21; the thermoplastic plastic trim 3 is a sheet, and the thermoplastic plastic trim 3 can be made of thermoplastic polyurethane (THERMO PLASTICPOLYURETHANE; referred to as: TPU), and The thermoplastic plastic trim 3 is pre-placed on the film 2 of the leather 1, and then the thermoplastic plastic trim 3 is heated by a high frequency through the mold 4 and the thermoplastic plastic trim 3 is molded together to form and stick it In the hollow pattern 21 , the mold 4 is engraved with a three-dimensional figure 41 for thermoplastically molding the thermoplastic decorative sheet 3 into a three-dimensional figure 31 .

But this method obtains decorative sheet and there is following problem: the first needs the surface treatment of pasted unit (with laser the thin film 2 on the surface of the loose leather 1 is removed); the second does not consider the shrinkage rate between different materials, The bonding and bonding are not firm; the third is that the outside of the high-frequency mold is easy to burn the surface of the pasted unit, resulting in delamination at the junction, which is easy to fall off after use and burying hidden dangers; fourth, the surface is reshaped by the mold, and individual patterns on the surface will appear incorrectly. beautiful.

The application number is CN201010203724.8, which discloses a method for making the upper of sports shoes, which includes the following steps: heat-press the design pattern on the corresponding position of the upper through high-frequency technology; A plurality of through holes are punched on the heat-pressed design pattern on the surface; the TPU decoration material is placed on the vamp with a plurality of punched holes (equivalent to removing the film 2 on the surface of the loose leather 1 with a laser ), through the high-frequency process, the TPU decorative material is hot-cut out of the decorative sheet of the design pattern and welded on the upper at the same time. It is most similar to the present invention, but there are substantial differences: 1. Same as the combination structure of the above-mentioned engraved leather and decorative pieces, the shrinkage rate between different materials is not considered, resulting in weak bonding and bonding; 2. Punching is required; 3. The outside of the high-frequency mold is easy to burn the surface of the pasted unit, resulting in delamination at the junction, which is easy to fall off after use, burying hidden dangers; 4. Through the surface shaping of the mold, some unsightly patterns will appear on the surface.

Contents of the invention

The object of the present invention is to provide a structure and method for laminating decorative panels with beautiful patterns, firm and non-falling off, and simple operation.

In order to overcome the above-mentioned defective in the prior art the present invention adopts following technical scheme:

A method for laminating a veneer, comprising the steps of:

1) Paste high-temperature-resistant plastic on one side of TPU or PVC. When pasting high-temperature-resistant plastic, it is necessary to drive out the internal air bubbles; paste high-temperature hot-melt adhesive on the other side of TPU or PVC;

2) Hot-pressing the high-temperature-resistant plastic in step 1) with a high-frequency wave on a mold with a pattern, and tearing off excess high-temperature hot-melt adhesive to obtain a patterned veneer body;

3) Place the veneer fitting body above the unit to be pasted, align the mold with the pattern, heat the veneer fitting body with high frequency, and then hot press the veneer fitting body onto the pasted unit;

4) Cool down to room temperature, tear off the excess high-temperature-resistant plastic, and stick a firm decorative piece on the pasted unit.

Further describe the workflow and principle:

1. Turn on the power, start the temperature switch, and pre-heat for 15-30 minutes;

2. When installing a mold with a pattern, press the emergency switch to prevent several machines from acting on their own;

3. After the mold is installed, restore the emergency switch button, switch the manual/automatic position to the manual position, then separate it several times, press the mold down switch, and confirm that the mold is pressed to the lowest point;

4. Press the up switch to check the levelness of the mold (subject to the levelness of ±1mm), if it is not parallel, adjust the leveling screw of the upper plate;

5. After the above is completed, put in the object to be processed (TPU or PVC, high-temperature-resistant plastic and high-temperature hot-melt adhesive), press the switch to the lowest point, confirm that the pressure is dead, and then press the high-frequency button to try the mold, control and adjust VC, and rise The mold confirms the accuracy and checks the level again.

6. Switch the automatic position and adjust the parameters;

7. Switch the high-frequency switch to the off position, press the start switch, and then realize automatic operation;

It is worth noting that: a. Whether the high frequency is just right, it needs to be adjusted through the VC regulator; b. The grounding copper sheet in front of the machine must be pressed on the aluminum plate below; c. The material sent into the hot press needs to be dried and the surface cannot Contains conductive powder, otherwise it will affect high frequency molds.

Further, the high-temperature-resistant plastic includes two layers of high-temperature-resistant films, one layer is an adhesive high-temperature-resistant film, and the other is an ordinary high-temperature-resistant film.

Further, the high temperature-resistant plastic is one or both of polyphenylene sulfide, chlorinated polyether, polyarylsulfone, PEEK, POB, aminoplast, EP, and PF. High-temperature-resistant plastics are polyphenylene sulfide (PPS) with a heat distortion temperature of up to 240°C, chlorinated polyether with a heat distortion temperature of 210°C, polyarylsulfone (PAR) with a heat distortion temperature of 280°C, PEEK The heat distortion temperature of POB can reach 230°C, that of POB can reach 260-300°C, that of aminoplastics can reach 240°C, that of EP can reach 230°C, and that of PF can reach 200°C. The heat distortion temperatures of these materials are much higher than the melting temperature of TPU by 100-110°C.

Further, the surface of the TPU or PVC is printed with a pattern by silk screen printing, and a three-dimensional pattern is formed after being hot-pressed by a mold with a pattern.

Further, during the high-frequency hot pressing in step 3), the drop of each layer does not exceed 0.8 mm, and the total drop of all layers does not exceed 1.5 mm.

Further, for the mold with patterns, the knife edge of the mold is a blunt mouth, the thickness of the blunt mouth is equal to the surface of the mold, and the slope of the knife edge must be against the finished product surface of the stamped mold; if the surface is made of flocking material, it needs to be reversed. The knife-edge surface and other non-pressing cutting dies are adjusted according to different designs.

Briefly describe the design structure and function of the mold:

The mold of the present invention not only has the function of cutting, but also has the function of increasing the adhesion effect. Specifically, the knife edge of the mold is blunt, and the thickness of the blunt mouth is equal to the surface of the mold, which is different from the general edge lip which is directly designed with sharp spikes.

When the pasted unit is a mesh structure: the cavity depth of the mold is 0.3-0.5mm more than the thickness of the veneer body; when the pasted unit is artificial leather, the cavity depth of the mold is 0.1-0.1mm less than the thickness of the veneer 0.4mm. In step 2), a side lip is reserved on the veneer fitting body, and the side lip is thickened by 0.5 mm, and widened by 1 mm as the pressing edge to increase the adhesion effect.

The flatness of the back of the mold shall be subject to the levelness of ±1mm. The width of the veneer fitting body in step 2) is calculated based on the center of the knife edge on both sides.

A veneer fitting structure, comprising a pasted unit and a veneer fitting body;

The veneer-attached body is obtained by hot-pressing TPU or PVC with a mold with a pattern, and is hot-pressed and pasted on the attached unit; the veneer-attached body includes a high-temperature hot-melt adhesive layer bonded by high-frequency and TPU or PVC layer;

The high-temperature hot-melt adhesive layer is used as the bonding filler between the pasted unit and the TPU or PVC layer.

Further, the pasted unit is one of leather, artificial leather, silk, linen, woolen cloth, cotton cloth, chemical fiber, and blended fabric.

Further, the high-temperature hot-melt adhesive layer is provided with a release paper, and the release paper is located at the bottom of the high-temperature hot-melt adhesive layer; the top of the TPU or PVC layer is printed with a pattern layer on the surface through silk screen printing.

Further, a foamed plastic layer is provided between the high-temperature hot melt adhesive layer and the TPU or PVC layer to increase the three-dimensional effect of the TPU or PVC layer. The area of the foamed plastic layer is smaller than that of the TPU or PVC layer, and the foamed plastic layer layer and match the three-dimensional shape of the pattern layer to form a three-dimensional effect.

Further, a side lip is provided on the TPU or PVC layer, the thickness of the side lip is 0.3-0.8mm, and the width is 0.8-1.4mm. Correspondingly match the blunt mouth setting of the knife edge of the mold. In order to make the TPU protrude, when the mold is pressed down for the second time, it is deeper than the first time, so that the lip of the TPU or PVC layer is squeezed inward to form a convex shape, and Since the design of the lip reserves the shrinkage rate of the pasted unit and the veneer body after heating and cooling, the traditional method requires large holes or surface treatment at the pasting position to reduce the shrinkage of the material. For the problem of stability, the design of the side lip of the present invention can penetrate the two materials into each other, and the position of the side lip has reserved a shrinkage space for the shrinkage rate, so as to achieve the effect of being firmly fastened to the attached unit.

The design of the veneer bonding structure and method of the present invention is scientific and reasonable, and has the following effects:

1. Protected by a high-temperature resistant film during hot pressing, the overall pattern is beautiful, and the veneer fit body does not leave traces on the mold, and can form a more three-dimensional pattern.

2. Through the workability of high-temperature hot-melt adhesive, it can be fused with most materials, and can transition the adhesion of two different materials, improve the bonding firmness, and have wider adaptability.

3. The edge setting of the high-temperature hot-melt adhesive not only reserves the shrinkage space for the shrinkage rate, but also can penetrate the two materials into each other, so as to firmly fasten the pasted unit and the trim fitting body.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative labor:

Fig. 1 is a schematic diagram of the principle of an embodiment of a decorative sheet bonding structure and method of the present invention;

Fig. 2 is a schematic diagram of the first hot pressing of the veneer bonding structure;

Fig. 3 is a schematic diagram of the second hot pressing of the veneer bonding structure;

Fig. 4 is a schematic cross-sectional view of a preferred embodiment of the veneer bonding structure;

Fig. 5 is a schematic cross-sectional view of another preferred embodiment of the veneer bonding structure;

In the attached drawings: 1-be pasted unit; 2-decorated body; 3-mold; 4-high temperature resistant plastic; 11-penetrating adhesive layer; 21-high temperature hot melt adhesive layer; 211-release paper; 22- TPU or PVC layer; 221-edge lip; 23-pattern layer; 24-foam plastic layer; 31-mold knife edge; 41-adhesive high temperature resistant film; 42-common high temperature resistant film.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

As shown in Fig. 1 to Fig. 3, a kind of veneer pasting method comprises the following steps:

1) Paste high-temperature-resistant plastic on one side of TPU or PVC. When pasting high-temperature-resistant plastic, it is necessary to drive out the internal air bubbles; paste high-temperature hot-melt adhesive on the other side of TPU or PVC;

2) Hot-pressing the high-temperature-resistant plastic in step 1) with a high-frequency wave on a mold with a pattern, and tearing off excess high-temperature hot-melt adhesive to obtain a patterned veneer body;

3) Place the veneer fitting body on the pasted unit, align it with the patterned mold, heat the veneer fitting body with high frequency, and then hot press the veneer fitting body onto the pasted unit; the main thing is to use high temperature hot melt adhesive The workability can not only be welded with TPU or PVC, but also can form a needle shape and penetrate into the internal structure of the pasted unit when it is welded with the pasted unit at high temperature for the second time, so as to achieve deep firmness.

4) Cool down to room temperature, tear off the excess high-temperature-resistant plastic, and stick a firm decorative piece on the pasted unit.

Further describe the workflow and principle:

8. Turn on the power, start the temperature switch, and pre-heat for 15-30 minutes;

9. When installing a mold with a pattern, press the emergency switch to prevent several machines from acting on their own;

10. After the mold is installed, restore the emergency switch button, switch the manual/automatic position to the manual position, then separate it several times, press the mold down switch, and confirm that the mold is pressed to the lowest point;

11. Press the up switch to check the levelness of the mold (subject to the levelness of ±1mm), if it is not parallel, adjust the leveling screw of the upper plate;

12. After the above is completed, put in the object to be processed (TPU or PVC, high-temperature resistant plastic and high-temperature hot-melt adhesive), press the switch to the lowest point, confirm that the pressure is dead, and then press the high-frequency button to test the mold, control and adjust VC, and rise The mold confirms the accuracy and checks the level again.

13. Switch automatic position and adjust parameters;

14. Switch the high-frequency switch to the off position, press the start switch, and then realize automatic work;

It is worth noting that: a. Whether the high frequency is just right, it needs to be adjusted through the VC regulator; b. The grounding copper sheet in front of the machine must be pressed on the aluminum plate below; c. The material sent into the hot press needs to be dried and the surface cannot Contains conductive powder, otherwise it will affect high frequency molds.

Specifically, the high-temperature-resistant plastic 4 includes two layers of high-temperature-resistant films, one layer is an adhesive high-temperature-resistant film 41 , and the other layer is an ordinary high-temperature-resistant film 42 . The role of the sticky high temperature resistant film is that it will not stick to TPU or PVC to damage the surface when the high temperature resistant plastic is torn off in the later stage; the double layer of high temperature resistant plastic will not damage the film during step 2) when the decorative piece is initially formed, and avoid TPU or PVC. PVC enters the mold cavity unevenly.

The high temperature resistant plastic is one or two of polyphenylene sulfide, chlorinated polyether, polyarylsulfone, PEEK, POB, aminoplast, EP, PF. High-temperature-resistant plastics are polyphenylene sulfide (PPS) with a heat distortion temperature of up to 240°C, chlorinated polyether with a heat distortion temperature of 210°C, polyarylsulfone (PAR) with a heat distortion temperature of 280°C, PEEK The heat distortion temperature of POB can reach 230°C, that of POB can reach 260-300°C, that of aminoplastics can reach 240°C, that of EP can reach 230°C, and that of PF can reach 200°C. The heat distortion temperatures of these materials are much higher than the melting temperature of TPU by 100-110°C.

In some embodiments, the surface of the TPU or PVC is printed with a pattern by silk screen printing, and a three-dimensional pattern is formed after being hot-pressed by a mold with a pattern.

In some embodiments, during the high-frequency hot pressing in step 3), the drop of each layer does not exceed 0.8 mm, and the total drop of all layers does not exceed 1.5 mm; this makes it easier to form the permeable adhesive layer 11 . As for the patterned mold, the knife edge of the mold is blunt, and the thickness of the blunt mouth is equal to the surface of the mold. Other non-press cutting dies are adjusted according to different designs.

Briefly describe the design structure and function of the mold:

The mold of the present invention not only has the function of cutting, but also has the function of increasing the adhesion effect. Specifically, the knife edge of the mold is blunt, and the thickness of the blunt mouth is equal to the surface of the mold, which is different from the general edge lip which is directly designed with sharp spikes.

When the pasted unit is a mesh structure: the cavity depth of the mold is 0.3-0.5mm more than the thickness of the veneer body; when the pasted unit is artificial leather, the cavity depth of the mold is 0.1-0.1mm less than the thickness of the veneer 0.4mm. In step 2), a side lip is reserved on the veneer fitting body, and the side lip is thickened by 0.5 mm, and widened by 1 mm as the pressing edge to increase the adhesion effect.

The flatness of the back of the mold shall be subject to the levelness of ±1mm. The width of the veneer fitting body in step 2) is calculated based on the center of the knife edge on both sides.

As shown in Fig. 2 to Fig. 5, a veneer lamination structure includes a pasted unit 1 and a veneer lamination body 2;

The veneer-attached body 1 is obtained by hot-pressing TPU or PVC with a mold 3 with a pattern, and is bonded to the pasted unit 1 by hot-pressing; The hot-melt adhesive layer 21 and the TPU or PVC layer 22 ; generally PVC is used for hard texture, and TPU for soft texture.

The high-temperature hot-melt adhesive layer 21 is used as a bonding filler between the pasted unit 1 and the TPU or PVC layer 22 .

In practice, the pasted unit 1 can be one of leather, artificial leather, silk, linen, woolen cloth, cotton cloth, chemical fiber, and blended fabric, which is suitable for many occasions. Generally, leather, artificial leather, cotton cloth, chemical fiber, and blended fabrics are mostly used in production, and the effect is better; For artificial leather, the high-temperature hot melt adhesive is directly fused with the surface layer and partly penetrates into the interior of the artificial leather, which cannot be removed without special tools; similarly, cotton cloth, chemical fiber, and blended fabrics also penetrate into the interior of the weaving pattern.

Specifically, the high-temperature hot-melt adhesive layer 21 is provided with a release paper 211, and the release paper is located at the bottom of the high-temperature hot-melt adhesive layer. A permeable adhesive layer 11 is formed; the top of the TPU or PVC layer 22 is printed with a pattern layer 23 on the surface through silk screen printing, and the pattern layer 23 matches the cavity of the mold, and the three-dimensional figure has an aesthetic feeling after hot pressing. A foamed plastic layer 24 is arranged between the high-temperature hot melt adhesive layer and the TPU or PVC layer 22 to increase the three-dimensional effect of the TPU or PVC layer 22. The area of the foamed plastic layer 24 is smaller than the TPU or PVC layer 22, and the foamed plastic layer The layer 24 also matches the three-dimensional shape of the pattern layer 23 to form a three-dimensional effect.

In some embodiments, the TPU or PVC layer 22 is provided with a side lip 221 , the thickness of the side lip 221 is 0.3-0.8 mm, and the width is 0.8-1.4 mm. Correspondingly match the blunt mouth setting of the mold knife edge 31. In order to make the TPU protrude, the second mold press is deeper than the first press, so that the lip 221 of the TPU or PVC layer is pressed inward to form a convex shape. , and because the design of the lip 221 reserves the shrinkage rate of the pasted unit 1 and the veneer body 2 after heating and cooling, the traditional method requires large holes or surface treatment at the pasting position to reduce the shrinkage rate of the material The problem of instability in the later stage caused by the side lip design of the present invention can penetrate the two materials into each other, and the position of the side lip 221 has reserved a shrinkage space for the shrinkage rate, so as to achieve the effect of being firmly fastened on the attached unit 1 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A method for laminating decorative pieces, characterized in that, comprising the following steps: 1) Paste high-temperature-resistant plastic on one side of TPU or PVC, and paste high-temperature hot-melt adhesive on the other side of TPU or PVC; 2) Hot-pressing the high-temperature-resistant plastic in step 1) with a high-frequency wave on a mold with a pattern, and tearing off excess high-temperature hot-melt adhesive to obtain a patterned veneer body; 3) Place the veneer fitting body above the unit to be pasted, align the mold with the pattern, heat the veneer fitting body with high frequency, and then hot press the veneer fitting body onto the pasted unit; 4) Cool down to room temperature, tear off the excess high-temperature-resistant plastic, and stick a firm decorative piece on the pasted unit. 2. The patch bonding method according to claim 1, characterized in that: The high-temperature-resistant plastic includes two layers of high-temperature-resistant films, one layer is a viscous high-temperature-resistant film, and the other is an ordinary high-temperature-resistant film. 3. The patch bonding method according to claim 2, characterized in that: The high temperature resistant plastic is one or two of polyphenylene sulfide, chlorinated polyether, polyarylsulfone, PEEK, POB, aminoplast, EP, and PF. 4. The patch bonding method according to claim 1, characterized in that: The surface of the TPU or PVC is printed with a pattern through silk screen printing, and a three-dimensional pattern is formed after being hot-pressed by a mold with a pattern. 5. The patch bonding method according to claim 1, characterized in that: In step 3) during medium and high frequency hot pressing, the drop of each layer shall not exceed 0.8 mm, and the total drop of all layers shall not exceed 1.5 mm. 6. The patch bonding method according to claim 5, characterized in that: For the mold with patterns, the knife edge of the mold is blunt, the thickness of the blunt mouth is equal to the surface of the mold, and the slope of the knife edge must lean against the finished product surface of the mold reserved for stepping. 7. A veneer bonding structure, characterized in that: Including the unit to be pasted and the fitting body of the veneer; The veneer-attached body is obtained by hot-pressing TPU or PVC with a mold with a pattern, and is hot-pressed and pasted on the attached unit; the veneer-attached body includes a high-temperature hot-melt adhesive layer bonded by high-frequency and TPU or PVC layer; The high-temperature hot-melt adhesive layer is used as the bonding filler between the pasted unit and the TPU or PVC layer. 8. The patch bonding structure according to claim 7, characterized in that: The pasted unit is one of leather, artificial leather, silk, linen, woolen cloth, cotton cloth, chemical fiber, and blended fabric. 9. The veneer bonding structure according to claim 7, characterized in that: The high-temperature hot-melt adhesive layer is provided with release paper, and the release paper is located at the bottom of the high-temperature hot-melt adhesive layer; the top of the TPU or PVC layer is printed with a pattern layer on the surface through silk screen printing. 10. The patch bonding structure according to claim 9, characterized in that: A foamed plastic layer is arranged between the high-temperature hot melt adhesive layer and the TPU or PVC layer to increase the three-dimensional effect of the TPU or PVC layer. The area of the foamed plastic layer is smaller than that of the TPU or PVC layer. The three-dimensional shape of the pattern layer is matched to form a three-dimensional effect.