TWI611770B - Leather-plastic composite forming method - Google Patents

Description

Leather-plastic composite forming method

The invention relates to the technical field of composite material processing, in particular to a leather-plastic composite material forming method.

Referring to Figure 12, in the production process of the upper 9 , the upper (or different color) upper parts 91, 92, 93, 94 are obtained by punching or cutting. 95, and then cooperate with a plurality of processes to sew and stick, and combine the upper parts 91, 92, 93, 94, 95 one by one to form a complete upper 9 by using the upper parts 91, 92, 93 The overlap of 94, 95 and the presentation of the lathe makes the upper 9 have a special grain or three-dimensional shape.

Although the production process of the upper 9 is achieved, the demand for the production of the upper 9 can be achieved, but there are still many unfinished defects, for example; the conventional upper 9 is composed of a plurality of different uppers 91, 92. , 93, 94, 95, and the formation of these upper parts 91, 92, 93, 94, 95, still need to go through multiple processes such as preparation, punching, cutting and sewing, to obtain the upper parts After 91, 92, 93, 94, 95, it is necessary to rely on a large amount of manpower for sewing or pasting, in order to form the upper 9 of the desired style, regardless of the output yield of individual operators; And behind the different processes, it includes the construction cost, maintenance cost, labor cost and operation of the equipment. The cost of materials such as the process.

In addition, the conventional upper parts 91, 92, 93, 94, 95 are more preferably a thermoplastic composite formed by bonding a thermoplastic film to a cloth. It utilizes an upper and lower mold to thermally press a fabric together with a thermoplastic film. This process can produce thermoplastic composites of different sizes and textures. However, simply relying on the hot pressing of the upper and lower molds, the cloth material and the thermoplastic film are pressed together, the bonding effect is not good, and the concave and convex lines of the end faces of the upper and lower molds are pressed on the thermoplastic composite material. It is not clear that the finished product is printed.

Also, because the process of the conventional upper 9 relies too much on labor, and the industrial transformation is difficult, the manufacturer can only continue to chase the low-cost manpower market and migrate. This phenomenon is not easy for the industry to see, so how can the process be greatly reduced? The cost, which can increase the strength of the upper structure, is the industry's most desired breakthrough.

In view of the above problems and deficiencies in the prior art, an object of the present invention is to provide a method for forming a leather-plastic composite material, to rapidly produce a composite material, and to form a desired form directly on a composite material by a negative pressure molding method. The upper and the three-dimensional shape overcome the above-mentioned lack of prior art.

According to the above object of the present invention, there is provided a method for forming a leather-plastic composite material, comprising the steps of: taking a material; cutting a thermoplastic film and a release paper into a predetermined shape, the thermoplastic film being subjected to a different heat-melting temperature a surface layer and an adhesive layer, and the release paper is falsely adhered to the surface layer; Contour cutting; cutting a plurality of positioning hole contours and at least one shaping zone contour on the thermoplastic film; removing the corner material; tearing off the thermoplastic film outside the contour of the positioning hole and the contour contour of the shaping zone, and retaining only The positioning hole contour and the thermoplastic film in the contour of the shaping zone; the secondary material; after the cloth is cut into a predetermined shape, the contour of the positioning hole (the thermoplastic film) and the contour of the shaping zone are applied (the thermoplastic film); hot-melt bonding; heating the positioning hole profile (the thermoplastic film) and the contour of the shaping zone (the thermoplastic film) to form a hot-melt state of the adhesive layer, and pressurizing the adhesive The adhesive layer penetrates into the cloth material, and the cloth material forms a close fit with each of the positioning hole profiles (the thermoplastic film) and the contour of the shaping zone (the thermoplastic film); punching; tearing off the release paper, Further, a punch is respectively corresponding to each of the positioning hole contour (the thermoplastic film) position and the cloth material, and punching is performed, and a plurality of positioning holes are formed in the cloth material, and the positioning holes are removed at the same time (the thermoplastic film Positioning flattening; will have the outline of the shaped area (the heat The cloth material is placed on a gas permeable mold of a negative pressure shaping machine with the cloth material facing upward, the gas permeable mold having at least one pattern and a plurality of positioning columns, and the pattern and each of the patterns Positioning column corresponding to the contour of the shaping zone (the thermoplastic film) and the position of each positioning hole; heating and preheating; heating the contour of the shaping zone (the thermoplastic film) to a molding temperature; negative compression molding Shape; using a vacuum unit to pump through the gas permeable mold Vacuuming, and forming a suction force on the contour of the shaping zone (the thermoplastic film) and the cloth material, and closely adhering to the pattern of the gas permeable mold to form a negative pressure shaping; obtaining the finished product; the vacuuming unit stops acting and taking off The breathable mold is shaped to complete the finished product.

By the composition of the above steps, the user is provided to quickly obtain a composite material, and the preset three-dimensional shape and texture of the upper is directly produced by the negative pressure molding on the composite material, thereby overcoming the conventional upper production method.

30‧‧‧ thermoplastic film

32‧‧‧ surface layer

34‧‧‧Adhesive layer

40‧‧‧ release paper

50‧‧‧Laser processing machine

361‧‧‧Position hole contour

362‧‧‧Shaping area outline

60‧‧‧ cloth

62‧‧‧Positioning holes

70‧‧‧Negative pressure shaping machine

71‧‧‧ stage

711‧‧‧air flow path

72‧‧‧ breathable mold

722‧‧‧pattern

724‧‧‧Positioning column

9‧‧‧ vamp

91, 92, 93, 94, 95‧‧‧ vamp spare parts

S11~S21‧‧‧Steps

Fig. 1 is a schematic view showing a method of forming a leather-plastic composite material of the present invention.

Fig. 2 is a schematic view showing an embodiment of the step of taking the material of the present invention.

Figure 3 is a schematic view of an embodiment of the contour cutting step of the present invention.

Figure 4 is a schematic view showing an embodiment of the step of removing trimming material of the present invention.

Fig. 5 is a schematic view showing an embodiment of the secondary material drawing step of the present invention.

Figure 6 is a schematic view of an embodiment of the hot melt bonding step of the present invention.

Figure 7 is a schematic view of an embodiment of the punching step of the present invention.

Figure 8 is a schematic view (1) of an embodiment of the positioning and flattening step of the present invention.

Figure 9 is a schematic view (2) of an embodiment of the positioning and flattening step of the present invention.

Figure 10 is a schematic view (I) of an embodiment of the vacuum forming step of the present invention.

Figure 11 is a schematic view (2) of an embodiment of the negative pressure shaping step of the present invention.

Figure 12 A side view of a conventional shoe body.

Hereinafter, the method for forming a leather-plastic composite material of the present invention and a structural example thereof will be further described with reference to the related drawings. In order to facilitate the understanding of the embodiments of the present invention, the same components are denoted by the same reference numerals.

Referring to Figures 1 to 11, the leather-plastic composite forming method of the present invention comprises: taking material S11, contour cutting S12, removing scrap S13, secondary material S14, hot-melt bonding S15, punching S16 , coloring S17, positioning flattening S18, warming preheating S19, negative pressure shaping S20, and obtaining finished product S21; the above step S11 is taken; please refer to Fig. 2, a thermoplastic film 30 and a separation The paper 40 is cut into a predetermined shape. The thermoplastic film 30 is composed of a surface layer 32 and an adhesive layer 34 (as shown in FIG. 2), and the surface layer 32 has a higher hot melt temperature than the adhesive layer 34, and the release paper 40 is false. It is adhered to the surface layer 32. The thermoplastic film 30 is selected from the group consisting of plastic polyurethane elastomer resin (TPU) + stilbene-butene rubber (SBR), plastic polyurethane elastomer resin (TPU) + styrene (SEBS), plastic polyurethane elastomer resin (TPU). ) + thermoplastic rubber (TPR), plastic polyurethane elastomer resin (TPU) + elastomer (EPDM), plastic polyurethane elastomer resin (TPU) + TPU hot melt adhesive, or plastic polyurethane elastomer resin (TPU) + nylon A combination of elastomers or any of them. Further, the color of the thermoplastic film 30 can be formed in any form such as a printing method, a coating color film method, or a surface interlayer method.

The contour cutting S12 step; as shown in FIG. 3, through the laser processing machine 50, at least a predetermined contour is cut through the thermoplastic film 30 which is falsely attached to the release paper 40. The preset contour includes at least a plurality of positioning hole contours 361 And at least one shaping zone contour 362, by the control of the laser processing machine 50, can accurately form a plurality of positioning hole contours 361 and shaping zone contours 362 at a predetermined position on the thermoplastic film 30, and will not be damaged. The release paper 40 allows the release paper 40 to be recycled again.

The above-mentioned step of removing the scrap S13; referring to FIG. 4, the excess thermoplastic film 30 is removed from the positioning hole profile 361 and the contoured profile 362, and only the thermoplasticity in the positioning hole profile 361 and the shaping zone profile 362 is retained. Membrane 30.

The above-mentioned secondary material S14 step; referring to FIG. 5, after the cloth 60 is cut into a predetermined shape, it is applied to the positioning hole profile 361 (thermoplastic film 30) and the shaping zone profile 362 (thermoplastic film 30). on. When implemented, the cloth material 60 includes, but is not limited to, a plain woven fabric, a knitted fabric, a non-woven fabric, or a sandwich fabric.

The above-mentioned hot-melt bonding S15 step; as shown in Fig. 6, the positioning hole profile 361 (thermoplastic film 30) and the shaping zone profile 362 (thermoplastic film 30) are heated to cause the adhesive layer 34 on the thermoplastic film 30 to form heat. In the molten state, the cloth 60 and the thermoplastic film 30 are pressed to infiltrate the adhesive layer 34 of the thermoplastic film 30 into the cloth 60, and the cloth 60 and the positioning hole profile 361 (thermoplastic film 30) and the contoured contour 362 ( The thermoplastic film 30) forms a tight fit, and after completion, the release paper 40 is peeled off and recovered. In practice, the above heating and pressing can be achieved by an extruder operation (not shown). Wherein, the hot melt temperature of the adhesive layer 34 is selected from 100 to 120 degrees Celsius, and the time of pressure bonding is preferably 10 to 30 seconds.

The punching step S16 step; please refer to FIG. 7 , and then cooperate with a punch (not shown) corresponding to the position and cloth of each positioning hole contour 361 (thermoplastic film 30). The material 60 is subjected to a punching operation, and a plurality of positioning holes 62 are formed in the cloth 60, and the positioning hole contour 361 (thermoplastic film 30) is removed.

The coloring step S17 is performed on the surface layer 32 of the shaping zone contour 362 (thermoplastic film 30), and at least one color zone (not shown) is coated according to the preset area (or all). The method of applying the coloring step S17 includes, but is not limited to, an inkjet machine or a screen printing method. In the implementation, the coloring step S17 can be selectively omitted or applied, and the following steps are continued after returning to the factory.

The positioning flattening step S18 is performed; as shown in FIGS. 8 and 9, the cloth material 60 having the contoured portion contour 362 (thermoplastic film 30) is placed on the stage 71 of a negative pressure shaping machine 70, and The cloth material 60 is placed away from the stage 71 (i.e., facing upward). The stage 71 has a plurality of air flow paths 711, and a gas permeable mold 72 is formed on the top surface of the stage 71 to communicate with the air flow path 711. The top surface of the gas permeable mold 72 is formed with at least one pattern 722 and a plurality of positioning portions. The post 724, and the pattern 722 and each of the positioning posts 724 correspond to the contoured contour 362 (thermoplastic film 30) on the cloth 60 and the positioning holes 62. When implemented, the gas permeable mold 72 is made of a ceramic material.

The warming preheating step S19; as shown in FIGS. 8 and 9, the vacuum forming machine 70 has at least one heating unit 73 disposed corresponding to the stage 71, and the contouring section 362 (thermoplastic) is formed by the heating unit 73. The film 30), the cloth material 60, and the gas permeable mold 72 are heated to a shaping temperature. When implemented, the shaping temperature is preferably between 135 and 180 degrees Celsius. In addition, the heating unit 40 may be disposed above the stage 71, or integrated on the stage 71, and normally maintain the gas permeable mold 72 at a standby temperature (shortening the heating time of the process), the standby temperature is between 50 degrees Celsius It is better to 90 degrees.

The above-described negative pressure shaping S20 step; as shown in FIGS. 8, 9, and 10, the negative pressure shaping machine 70 further has at least one corresponding loading stage 71 and is connected to the vacuuming unit 74 of the air flow path 711. When the shaping zone contour 362 (thermoplastic film 30) and the cloth material 60 reach the shaping temperature, the vacuuming unit 74 is synchronized to generate a suction force, and the suction force passes through the air flow path 711 and passes through the gas permeable mold 72. Transitioning to the surface of the pattern 722, forming a suction force on the contoured portion contour 362 (thermoplastic film 30) and the cloth material 60, so that the contoured portion contour 362 (thermoplastic film 30) and the cloth material 60 are closely attached to the pattern of the gas permeable mold 72 722, forming a negative pressure shaping shape (the three-dimensional shape and texture of the surface of the pattern 722 is obtained by rubbing), so that the three-dimensional shape and texture on the gas permeable mold 72 are properly shaped (finished and obtained) in the contour of the shaping zone 362 ( The thermoplastic film 30) and the cloth material 60.

The step of obtaining the finished product S21 is as described above. Referring to FIG. 11, the negative pressure shaping tool 70 further has at least one corresponding carrier 71 and communicates with the air supply unit 75 of the air flow path 711. After the shaping of the shaping zone contour 362 (thermoplastic film 30) is completed, the vacuuming unit 74 stops actuating, so that the user can directly take off the composite material which is finished on the loading table 71 (the contour of the shaping zone of the plastic body is integrated 362) (thermoplastic film 30) and cloth material 60). The air supply unit 75 can also be supplied with air, and after passing through the air permeable mold 72 along each air flow path 711, the surface transitions to the surface of the embossed pattern 722, and the contoured area contour 362 (thermoplastic film 30) and the cloth material 60 are formed. As the ejector is made, it is convenient for the user to take away the composite material which is finished by the embossing (the integrated contoured contour 362 (thermoplastic film 30) and the cloth material 60). When implemented, the air supply unit 75 can be selectively omitted.

According to the above steps, the composite material produced according to the invention can save the process and material loss of each shoe spare parts preparation, and can also omit the sewing connection. In addition, since the composite material of the present invention is integrally formed, it has better structural strength and production convenience with respect to the process of sewing the combination.

The above description is only for the preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Changes that are well known to those skilled in the art are still within the scope of the invention.

S11~S21‧‧‧Steps

Claims (5)

A leather-plastic composite forming method comprises the following steps: (a) taking a material; cutting a thermoplastic film and a release paper into a predetermined shape, the thermoplastic film being composed of a surface layer of a different hot melt temperature And the adhesive sheet is pseudo-adhered to the surface layer; (b) contour cut; the plurality of positioning hole contours and at least one contoured area contour are cut through the thermoplastic film; c) removing the trim; tearing off the thermoplastic film outside the contour of the positioning hole and the outline of the shaping zone, leaving only the positioning hole contour and the thermoplastic film in the contour of the shaping zone; (d) secondary material After cutting a cloth into a predetermined shape, covering the positioning hole contour (the thermoplastic film) and the contour of the shaping region (the thermoplastic film); (e) hot-melt bonding; the positioning hole The contour (the thermoplastic film) and the contour of the shaping zone (the thermoplastic film) are heated to form a hot melt state of the adhesive layer, and the pressure is applied to penetrate the adhesive layer into the cloth material, so that the cloth material and each of the positioning materials The contour of the hole (the thermoplastic film) and the profile of the shaped region (the thermoplastic film) form a close fit; f) punching; tearing off the release paper, and then matching a punch to the position of the positioning hole (the thermoplastic film) and the cloth, punching, and forming a plurality of positioning holes on the cloth And remove each of the positioning holes Contour (the thermoplastic film); (g) positioning and flattening; placing the cloth material having the contour of the shaping zone (the thermoplastic film) on a gas permeable mold of a negative pressure shaping machine, and making the cloth The gas permeable mold has at least one pattern and a plurality of positioning columns, and the pattern and each of the positioning posts correspond to the contour of the shaping zone (the thermoplastic film) and the positions of the positioning holes; (h) Warming preheating; heating the contour of the shaping zone (the thermoplastic film) to a molding temperature; (i) vacuum forming; vacuuming through the gas permeable die by a vacuuming unit, and shaping the shaping zone The contour (the thermoplastic film) forms a suction force with the cloth material, and closely adheres to the pattern of the gas permeable mold to form a negative pressure shaping shape; (j) obtains a finished product; the vacuuming unit stops acting, and the gas permeable mold is taken away The finished product is finished. The leather-plastic composite forming method according to claim 1, wherein the step (f) and the step (g) further comprise a coloring (f1); (The thermoplastic film) is coated with at least one color zone. The leather-plastic composite forming method according to claim 1 or 2, wherein the shaping temperature is between 135 and 180 degrees Celsius. The leather-plastic composite forming method according to claim 1 or 2, wherein the heating unit further maintains the gas permeable mold at a standby temperature, which is between 50 and 90 degrees Celsius. . The leather-plastic composite forming body described in claim 1 or 2 The method wherein the adhesive layer has a hot melt temperature of between 100 and 120 degrees Celsius.