TPX membrane cyclic regeneration method and equipment

Abstract

The invention relates to the technical field of circuit board production, and discloses a TPX film cyclic regeneration method and equipment, and the method comprises the following steps: recovering a used TPX film; carrying out edge appearance inspection on the recycled TPX film; carrying out plane hot pressing on the TPX film passing the appearance detection, so that the surface of the TPX film is recovered to be flat; and recycling and coiling the TPX film subjected to plane hot pressing. According to the cyclic regeneration method of the TPX film, concave-convex parts on the surface of the used TPX film can be flattened, so that the recycled TPX film can meet the production standard and can be continuously put into production circularly, the use frequency of the TPX film is increased, the use amount of the TPX film in the production process of a circuit board is reduced, the production cost is reduced, and the pollution to the environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board production, and in particular to a TPX membrane recycling method and equipment. Background Art

[0002] In the production process of flexible printed circuits (FPCs), some of the circuit boards need to be covered with protective films before they are manufactured. These protective films are usually transported on a tape using TPX films (resistive films) as carriers. In the prior art, TPX films are often used as consumables and are discarded as waste after use. Due to the high unit price of TPX films and the large amount of use, the production cost of FPCs is high, and there are currently no other better alternative products. For this reason, it is necessary to design a recycling solution for TPX films to reduce the waste rate of TPX films, reduce production costs, and reduce environmental pollution. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a TPX membrane recycling method, which can recycle the used TPX membrane and reduce the production cost of the circuit board.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: A TPX membrane recycling regeneration method, comprising:

[0005] Recycling of used TPX membranes;

[0006] Conduct edge appearance inspection on the recovered TPX membrane;

[0007] The TPX film that has passed the appearance inspection is subjected to flat heat pressing to restore the surface of the TPX film to a flat state;

[0008] The TPX film after flat heat pressing is recovered into a roll.

[0009] Compared with the prior art, the beneficial effect of the present invention is that the surface concave and convex of the recycled TPX film is flattened by plane hot pressing, so that the recycled TPX film becomes flat again, and the material to be attached can be reattached and put into use again. This method can make the recycled TPX film meet the use standards again and be recycled, thereby increasing the number of times the TPX film is used, reducing production costs, and reducing pollution to the environment.

[0010] The above-mentioned TPX membrane replacement and regeneration method, after the step of recycling the TPX membrane that has been subjected to flat hot pressing into a roll, further comprises:

[0011] The regenerated TPX membrane roll is fully unfolded and inspected, the abnormal section of the TPX membrane roll is cut off, and the TPX membrane with the abnormal section cut off is spliced.

[0012] In the above-mentioned TPX membrane replacement and regeneration method, in the step of performing flat hot pressing on the TPX membrane that has passed the appearance inspection to restore the surface of the TPX membrane to be flat, the flat hot pressing temperature ranges from 140 to 160°C.

[0013] In the above-mentioned TPX membrane replacement and regeneration method, in the step of performing flat hot pressing on the TPX membrane that has passed the appearance inspection to restore the surface of the TPX membrane to be flat, the oil pressure range of the jig is 8-10Mpa.

[0014] In the above-mentioned TPX membrane replacement and regeneration method, in the step of performing flat hot pressing on the TPX membrane that has passed the appearance inspection to restore the surface of the TPX membrane to be flat, the flat hot pressing molding time ranges from 30 to 40 seconds.

[0015] In the above-mentioned TPX membrane replacement and regeneration method, in the step of performing flat hot pressing on the TPX membrane that has passed the appearance inspection to restore the surface of the TPX membrane to be flat, the preheating time of the fixture before each flat hot pressing is in the range of 3-5s.

[0016] In the above-mentioned TPX membrane replacement and regeneration method, in the step of performing flat hot pressing on the TPX membrane that has passed the appearance inspection to restore the surface of the TPX membrane to a flat state, the hot pressing jig used includes an upper jig plate and a lower jig plate, and silicon aluminum foil and fiber paper are sequentially arranged on the lower surface of the upper jig plate from top to bottom, and silicon aluminum foil and fiber paper are sequentially arranged on the upper surface of the lower jig plate from bottom to top.

[0017] In the above-mentioned TPX membrane replacement and regeneration method, the thickness of the silicon aluminum foil is 0.55 mm, and the thickness of the fiber paper is 0.2 mm.

[0018] A TPX membrane recycling and regeneration device for implementing the above-mentioned TPX membrane recycling and regeneration method comprises an unwinding mechanism, a rewinding mechanism and a hot pressing mechanism, wherein the hot pressing mechanism is arranged on a belt path from the unwinding mechanism to the rewinding mechanism, and a hot pressing jig of the hot pressing mechanism comprises an upper jig plate and a lower jig plate, wherein silicon aluminum foil and fiber paper are arranged in sequence from top to bottom on the lower surface of the upper jig plate, and silicon aluminum foil and fiber paper are arranged in sequence from bottom to top on the upper surface of the lower jig plate.

[0019] In the above-mentioned TPX membrane recycling equipment, the thickness of the silicon aluminum foil is 0.55 mm, and the thickness of the fiber paper is 0.2 mm.

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flow chart of a TPX membrane recycling regeneration method according to an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a hot pressing jig for a TPX membrane recycling method according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the TPX membrane recycling and regeneration equipment according to an embodiment of the present invention.

[0024] Description of Figure Numbers:

[0025] 100 hot pressing jig, 110 upper jig plate, 111 silicon aluminum foil, 112 fiber paper, 200 unwinding mechanism, 300 rewinding mechanism. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below. Figure 1 The embodiment of the present invention provides a TPX membrane recycling method, comprising the following steps:

[0027] Recycling of used TPX membranes;

[0028] Conduct edge appearance inspection on the recovered TPX membrane;

[0029] The TPX film that has passed the appearance inspection is subjected to flat heat pressing to restore the surface of the TPX film to a flat state;

[0030] The TPX film after flat heat pressing is recovered into a roll.

[0031] The TPX film recycling method performs flat hot pressing on the recycled TPX film, and uses a principle similar to ironing clothes to iron the surface of the recycled TPX film at high temperature and high pressure, thereby eliminating the unevenness on the surface of the recycled TPX film, so that the state of the recycled TPX film is restored to a usable standard, and the materials that need to be bonded can be reattached and recycled into production. By adopting the TPX film recycling method, the number of times the TPX film is used can be increased, thereby reducing the consumption of the TPX film and reducing the production cost of the circuit board. At the same time, the amount of discarded TPX film can be reduced, and the pollution caused to the environment by the production process of the circuit board can be reduced.

[0032] It is understandable that when performing an edge appearance inspection on the recycled TPX film roll, it is necessary to check whether the edge of the recycled TPX film roll is flat and free of damage and whether there are no signs of burning.

[0033] It is understandable that during the planar hot pressing process, appropriate hot pressing process parameters need to be set to prevent the recovered TPX film from dissolving or pulling up during the hot pressing process, causing the TPX film to lose its adhesive resistance, resulting in the inability to separate the materials that need to be bonded during the production process from the TPX film. In this embodiment, during the hot pressing process, the hot pressing temperature range is preferably 140-160°C, the time range for each hot pressing molding is preferably 30-40s, and the oil pressure range of the hot pressing fixture 100 during the hot pressing process is preferably 8-10Mpa. Before each hot pressing, the hot pressing fixture 100 should be preheated for 3-5s.

[0034] It is understandable that during the hot pressing process, the hardness of the contact surface between the hot pressing fixture 100 and the TPX film also needs to be maintained within an appropriate range to avoid the hardness being too high to thin the TPX film and affect the adhesive resistance of the TPX film, and to avoid the hardness being too soft to make it impossible to smooth out the unevenness on the surface of the TPX film. Figure 2 In this embodiment, the hot pressing jig 100 includes an upper jig plate 110 and a lower jig plate. The lower surface of the upper jig plate 110 is provided with silicon aluminum foil 111 and fiber paper 112 in sequence from top to bottom, and the upper surface of the lower jig plate is also provided with silicon aluminum foil 111 and fiber paper 112 in sequence from bottom to top, so that the hardness of the contact surface between the hot pressing jig 100 and the TPX film is maintained at an appropriate level. In this embodiment, the thickness of the silicon aluminum foil 111 is 0.55 mm, and the thickness of the fiber paper 112 is 0.2 mm. The hot pressing jig 100 can perform flat hot pressing on a TPX film of 500 mm length each time, so after each hot pressing, the unwinding mechanism 200 and the winding mechanism 300 drive the TPX film to move forward 500 mm.

[0035] It is understandable that when a roll of recycled TPX film is regenerated and needs to be spliced ​​and replaced, the head of the new TPX film roll needs to be connected to the tail of the TPX film on the equipment with a heat-resistant tape. And after each roll change, it is necessary to manually observe the surface of the TPX film after the first 2-3 hot pressings to see if there are marks, indentations or wrinkles. If there are, it is necessary to stop the machine in time to find the abnormal cause, and continue to flatten the TPX film after the abnormal cause is eliminated.

[0036] It is understandable that in some embodiments, the TPX film coil after hot pressing needs to be placed on a winder for full inspection to detect whether there are defects such as marks, indentations, wrinkles, damage or stretching on the surface of the TPX film. For the unusable defective sections detected, the defective sections need to be cut off and removed, and the two ends of the TPX film strip after the defective sections are removed need to be re-spliced ​​to avoid the defective sections from causing defective products during repeated production and use. The regenerated TPX film coil after inspection needs to be labeled on both sides of the TPX film to distinguish the usable surface in contact with the product or material for subsequent use.

[0037] The TPX membrane recycling equipment of the embodiment of the present invention includes an unwinding mechanism 200, a rewinding mechanism 300 and a hot pressing mechanism, the hot pressing mechanism is placed on the belt path from the unwinding mechanism 200 to the rewinding mechanism 300, the hot pressing mechanism includes a heating device, a hydraulic cylinder and a hot pressing jig 100, wherein the hot pressing jig 100 includes an upper jig plate 110 and a lower jig plate, both of which are provided with a heating device, and one of the upper jig plate 110 and the lower jig plate is connected to the hydraulic cylinder, and can be pressed toward the other jig plate under the drive of the hydraulic cylinder. In this embodiment, silicon aluminum foil 111 and fiber paper 112 are sequentially arranged on the lower surface of the upper jig plate 110 from top to bottom, and silicon aluminum foil 111 and fiber paper 112 are also sequentially arranged on the upper surface of the lower jig plate from bottom to top, wherein the thickness of the silicon aluminum foil 111 is 0.55 mm, and the thickness of the fiber paper 112 is 0.2 mm.

[0038] It is understandable that the production process of flexible circuit boards often includes a hot pressing process, so in some embodiments, the recycling of TPX film can be directly achieved by using the existing hot pressing equipment in the workshop. When the hot pressing equipment of the flexible circuit board is used to regenerate the recovered TPX film, it is necessary to replace the hot pressing fixture 100 on the equipment with a hot pressing fixture 100 dedicated to TPX film regeneration, and set the parameters of the equipment according to the hot pressing parameters of the TPX film regeneration.

[0039] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A TPX membrane recycling method, characterized in that: include: Recycling of used TPX membranes; Conduct edge appearance inspection on the recovered TPX membrane; The TPX film that has passed the appearance inspection is subjected to flat heat pressing to restore the surface of the TPX film to a flat state; The TPX film after flat heat pressing is recovered into a roll.

2. The TPX membrane regeneration method according to claim 1, characterized in that: The step of recycling the TPX film after the planar hot pressing into a roll also includes: The regenerated TPX membrane roll is fully unfolded and inspected, the abnormal section of the TPX membrane roll is cut off, and the TPX membrane with the abnormal section cut off is spliced.

3. The TPX membrane recycling regeneration method according to claim 1, characterized in that: In the step of performing planar hot pressing on the TPX film that has passed the appearance inspection to restore the surface of the TPX film to be flat, the planar hot pressing temperature ranges from 140 to 160°C.

4. The TPX membrane recycling regeneration method according to claim 1, characterized in that: In the step of performing flat hot pressing on the TPX film that has passed the appearance inspection to restore the surface of the TPX film to be flat, the oil pressure range of the jig is 8-10Mpa.

5. The TPX membrane recycling regeneration method according to claim 1, characterized in that: In the step of performing planar hot pressing on the TPX film that has passed the appearance inspection to restore the surface of the TPX film to be flat, the planar hot pressing molding time ranges from 30 to 40 seconds.

6. The TPX membrane recycling regeneration method according to claim 1, characterized in that: In the step of performing planar hot pressing on the TPX film that has passed the appearance inspection to restore the surface of the TPX film to a flat state, before each planar hot pressing, the preheating time of the hot pressing jig (100) is in the range of 3-5 seconds.

7. The TPX membrane recycling regeneration method according to claim 1, characterized in that: In the step of performing flat hot pressing on the TPX film that has passed the appearance inspection to restore the surface of the TPX film to a flat state, the hot pressing jig (100) used comprises an upper jig plate (110) and a lower jig plate, wherein silicon aluminum foil (111) and fiber paper (112) are sequentially arranged on the lower surface of the upper jig plate (110) from top to bottom, and silicon aluminum foil (111) and fiber paper (112) are sequentially arranged on the upper surface of the lower jig plate from bottom to top.

8. The TPX membrane recycling regeneration method according to claim 6, characterized in that: The thickness of the silicon aluminum foil (111) is 0.55 mm, and the thickness of the fiber paper (112) is 0.2 mm.

9. A TPX membrane recycling and regeneration device for implementing the TPX membrane recycling and regeneration method according to any one of claims 1 to 8, characterized in that: The invention comprises an unwinding mechanism (200), a rewinding mechanism (300) and a hot pressing mechanism, wherein the hot pressing mechanism is arranged on a belt path from the unwinding mechanism (200) to the rewinding mechanism (300), and a hot pressing jig (100) of the hot pressing mechanism comprises an upper jig plate (110) and a lower jig plate, wherein silicon aluminum foil (111) and fiber paper (112) are arranged in sequence from top to bottom on the lower surface of the upper jig plate (110), and silicon aluminum foil (111) and fiber paper (112) are arranged in sequence from bottom to top on the upper surface of the lower jig plate.

10. The TPX membrane recycling and regeneration equipment according to claim 9, characterized in that: The thickness of the silicon aluminum foil (111) is 0.55 mm, and the thickness of the fiber paper (112) is 0.2 mm.

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