JP2015221395A - Work production method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of improving a step of smoothing the surface of work after drawing the work immersed in a resin vessel, a step of boring a connection part between a suspension metal fitting and the work and a step of repairing the trace parts after the boring step, in conducting uniform dip coating of the surface of a to-be-coated object (work), e.g. a metal product.SOLUTION: A work production method comprises connecting together a freely rotatable outer frame body 5 and a frame part of work W, e.g. a metal body, through three or more wires (metal wires) 6 and fixing the resultant body, immersing the whole of the work and the work-side connection parts of the wires 6 in a resin vessel 7 containing a thermoplastic liquid resin in a state where the work W is suspended from the back surface of the outer frame body 5, taking out the work from the resin vessel 8 after adhesion of the liquid resin 8 and reversing the outer frame body 5 and the work together, cutting the individual connection parts 6CR of the wires 6 connected with the work W, in order, by using a nipper after hardening of the liquid resin 8 and repairing the trace parts of the wires 6 through a step of plugging the individual trace parts of the wires 6 after the cutting with a resin.

Description

  The present invention is a process for uniformly dip-coating the surface (upper surface and lower surface) of a workpiece (corresponding to a coating object, generally corresponding to a workpiece) such as a metal product (for example, a floor slat for an animal cage) Regarding technology.

  Conventionally, when performing dip coating on workpieces of various products, the workpiece is connected in a state where the workpiece is suspended from the frame by connecting the frame and the workpiece with one or two wires. A method of immersing in a resin tank containing a thermoplastic liquid resin is generally performed. In this method, the work is taken out from the resin tank slowly taking time so that the thermoplastic liquid resin in a semi-molten state attached to the work does not drip. For this reason, the film that covers the lower surface of the work in a suspended state has a longer immersion time, and therefore becomes thicker than the film that covers the upper surface of the work. It becomes. Moreover, although it is relatively inconspicuous, a trace of the thermoplastic liquid resin in a semi-molten state dripping is left on the lower surface of the workpiece. If the uneven thickness of the coating film and the smoothness of the workpiece surface do not matter as product quality, it can be said that such a manufacturing method is sufficient. The applicant is not a person who knows where the prior art document disclosing this prior art exists.

Article of “PVC coating semi-automatic line” on the Minoru Sangyo Co., Ltd. website (http://www.f-minoru.co.jp/tokusetsu/) Articles on the website of Kobayashi Co., Ltd. (http://www.kbjapan.co.jp/jpn/business/01.html)

  However, as the quality of the workpiece, for example, a metal body such as floor slats is required, 1) the coating film thickness is required to be uniform overall, and 2) the workpiece surface is smooth and has no irregularities. Is required, it is not preferable to employ the dip coating method described above.

  In order to satisfy such a requirement, first, the immersion time of the work suspended from the frame body in the resin tank is relatively short, and the work is taken out of the resin tank quickly to achieve a uniform coating film thickness. There is a need. And it is necessary to make the thermoplastic liquid resin adhering to the lower surface of a workpiece | work not to drip at the time of a vertical motion of a workpiece | work. For this purpose, it is required to move the workpiece up and down by firmly fixing the workpiece to the frame.

  For example, in Non-Patent Document 1, in a process of coating a surface of a workpiece by immersing a workpiece of a large metal product (floor slats, etc.) in a resin tank, four pieces extending from the outer frame are provided. There is disclosed a technique in which a column-shaped hanging metal fitting is fixed on the upper surface of a work and the work is immersed in a resin tank.

  In this case, it is necessary to separate each hanging metal fitting from the upper surface of the coated workpiece in the subsequent process of the coating process. For this purpose, it is necessary to excavate the lower peripheral edge portion of each suspended metal fitting. Since the area of the connection part between each hanging bracket and the work is relatively large even when viewed from the area of the whole work, the work time of the excavation process must be long.

In addition, due to the removal process of each hanging bracket from the workpiece surface, a relatively large hole-like trace is formed on the excavation portion of the lower portion of each hanging bracket within the surface of the coated workpiece. It will occur. For example, considering the dimensions of the above columnar metal fittings, the size of the trace portion is considered to be in a range where the diameter is given by a dimension of approximately 20 mm to 30 mm, and the repair area is relatively large when viewed from the surface area of the workpiece It can be said that it is big. If these traces are left unattended, it cannot be said that the state of the workpiece is in a favorable state from the viewpoint of actual use. Therefore, it is necessary to further provide a process for realizing a work surface having no traces or irregularities by filling the traces of each hole formed on the work surface with a member such as resin of the same color one by one to repair the work surface.

  However, since the size of each hanging bracket itself is never smaller than the size of the workpiece, each trace generated by the excavation work also becomes a recess having a relatively large size. For this reason, the repair process for filling the traces and smoothing the entire workpiece surface requires a long work time even compared to the time for the immersion treatment. Such work time also occupies a considerable part of the work time of the whole process, like the excavation process.

As a result, there is a problem that the manufacturing cost in the removal process and the repair process of the hanging metal fitting after the workpiece coating process must be increased.

  Further, since the area of each trace is so large that it cannot be ignored compared with the area of the workpiece surface, it is considered that the workpiece surface after repair is not necessarily a clean surface without irregularities.

  The present invention has been made in view of such problems, and its main object is to eliminate the above-described hanging portion removal step and subsequent repair step after the coating step in the coating step. The manufacturing work time of the workpiece can be remarkably reduced, thereby reducing the manufacturing cost. In addition, the main object of the present invention is to propose a method for manufacturing a workpiece that can realize a workpiece surface that is so beautiful that there is almost no unevenness in appearance through the coating step and the subsequent steps.

  In the method for manufacturing a workpiece according to the subject of the present invention, a rotatable outer frame body and the workpiece are connected by at least three metal wire rods, and the workpiece is connected from the back surface of the outer frame body by the at least three metal wire rods. In a state where the work can be hung and the work is hung from the back surface of the outer frame body, the outer frame body is moved toward a resin tank containing a thermoplastic liquid resin, A step of immersing the entire workpiece and each workpiece-side connection portion of the at least three metal wire rods in the thermoplastic liquid resin in the resin tank; and all of the workpiece and the metal wire rod by the immersion step After the thermoplastic liquid resin is adhered to the work side connection part, the work side connection part of each of the work and the at least three metal wires is taken out from the resin tank, and then the outer side is removed. Both the body and the workpiece are reversed, the thermoplastic liquid resin adhered to the workpiece and the metal wire in the reversed state, and after the thermoplastic liquid resin curing step, the at least three And a step of cutting a connecting portion between the metal wire and the workpiece in each workpiece-side connecting portion of the metal wire.

  According to the subject of the present invention, after the workpiece and each workpiece-side connecting portion of at least three metal wires are taken out from the resin tank, the outer frame and the workpiece are reversed together, and the workpiece is in the inverted state. And the thermoplastic liquid resin adhering to the metal wire is cured. Therefore, in the state after being taken out from the resin tank, the thermoplastic liquid resin adhering to the surface or upper surface side of the workpiece is in a state of being cured from the semi-molten state, while the back surface or lower surface of the workpiece. The semi-molten thermoplastic liquid resin adhering to the side is in a state of being cured while dripping down due to gravity. In this state, both the outer frame body and the work are reversed, so that after the reversal, they are reversed and are placed on the front surface or the upper surface side. As a result of the thermoplastic liquid resin in a state of being uniformly spread on the surface of the workpiece, the thermoplastic liquid resin reversely arranged on the surface or the upper surface side after the reversal is cured without causing uneven portions. By performing the reversal process in this way, a coating film having a substantially uniform thickness and a surface with no trace of sagging flow (a surface with no irregularities) is realized on both the upper and lower surfaces of the workpiece. Is done.

  Moreover, according to the subject matter of the present invention, the base portion of the metal wire that forms the connection portion with the surface of the workpiece is cut from the workpiece, and the metal wire on the outer frame side is separated from the workpiece, and the workpiece is covered. A part of the metal wire remaining on the covering film side is pulled out. At that time, a minute loophole of the metal wire only occurs in the coating film. Therefore, the area of the portion (trace portion) for repairing the surface of the workpiece after the workpiece immersion / reversing step can be remarkably reduced. For this reason, in the subject matter of the present invention, repair work is unnecessary, or even if repair is performed, the repair time can be further shortened. As a result, the manufacturing cost of the coated workpiece can be greatly reduced. I can plan.

As described above, in the subject of the present invention, a trace portion (a minute hole which is a shell of a metal wire rod) remaining on the surface of the coating film of the workpiece is a small portion that is difficult to recognize visually. Become. For this reason, even if a minute trace portion remains, there is no problem in practical use of the coated workpiece, and it is possible to make the surface of the workpiece coated with the coating film beautiful. . Since the trace portions on the workpiece surface are very small, it is possible to repair each trace portion in a short time to realize a smooth workpiece surface having no trace portion at all.

  Hereinafter, various embodiments of the present invention will be described in detail along with the effects and advantages thereof with reference to the accompanying drawings.

It is a block diagram which shows typically the structure of the workpiece coating processing apparatus which concerns on Embodiment 1 of this invention. It is a top view which shows typically the state before suspension in which the workpiece | work and the outer frame body were connected by the wire. It is a front view which shows typically the state which immersed the work and the workpiece | work side part of the wire in the resin tank. It is a front view which shows typically the process which pulls up an outer frame body and a workpiece | work from a resin tank after completion | finish of an immersion process. It is a front view which shows typically the process which reverses an outer frame body and a workpiece | work (half rotation of 180 degrees) as a state immediately before. It is a front view which shows typically the state of the workpiece | work after cut | disconnecting the wire couple | bonded on the surface of a workpiece | work. It is a front view which shows typically the state of the workpiece | work after repairing the trace part on the surface of a workpiece | work.

(Embodiment 1)
<Features of this embodiment>

A feature point or core part of the present embodiment is that a reversible outer frame body and a work (for example, a frame part provided on the work) are composed of a plurality (at least three or more) of metal wires such as wires. After the workpieces are connected to each other and can be suspended from the back surface of the outer frame body through a metal wire, the workpiece is immersed in the resin tank by vertical movement and taken out from the resin tank. The point is that the whole workpiece surface is coated by reversing the workpiece together.

  <Configuration of work coating processing equipment>

  FIG. 1 is a block diagram schematically showing a configuration of a workpiece coating apparatus that realizes a “work manufacturing method” according to the present embodiment.

In FIG. 1, as will be described later, an outer frame body and a work integrated so as to be able to be suspended via a wire made of stainless steel or steel (corresponding to “metal wire”) is an installation / reversing device. 1 is installed in a state where it can be transported. After the installation, the outer frame body and the work in an integrated state are made into a rail 4 that forms a track in accordance with a command of a controller or computer (not shown) in the installation / reversing device 1 and an operation of the device 1. Are conveyed to the dipping device 2. The movement of the outer frame body and the workpiece along the rail 4 to the immersion device 2 may be performed manually.

The dipping device 2 has a resin tank (corresponding to “immersion tank”) 7, and a thermoplastic liquid resin 8 is placed in the resin tank 7. The outer frame body and the workpiece moved or conveyed above the resin tank 7 are lowered toward the resin tank 7 in a suspended state, and the work and a part of each wire are part of the thermoplasticity. It is immersed in the liquid resin 8. The workpiece or the like to which the thermoplastic liquid resin 8 is attached in a semi-molten state is taken out from the resin tank 7 and is conveyed again into the installation / reversing device 1 by reverse conveyance along the rail 4. The

The outer frame body and the workpiece conveyed into the installation / reversing device 1 are rotated 180 degrees (half rotation) by the installation / reversing device 1 and reversed together. Thereafter, in the inverted state, the outer frame body and the work are transported along the rail 4 to the drying furnace 3 and heated in the furnace, and the attached thermoplastic liquid resin 8 is cured. The transfer operation to the drying furnace 3 may be performed manually instead of the automatic transfer.

Thereafter, the outer frame body and the workpiece are taken out from the drying furnace 3, and a wire cutting step and a wire trace repairing step after cutting are performed.

<Manufacturing method of workpiece to be coated>

Hereinafter, a series of processes in the workpiece coating process will be described with reference to the drawings.

Here, in this embodiment, a floor slat for animal breeding is applied as an example of a metal body that is an example of “work” or “base material”. Of course, other metal bodies can be applied as an example of the “work”. Alternatively, a base material other than a metal body (see Non-Patent Document 2) can be applied as an example of “work”.

The “thermoplastic liquid resin” as a coating material in the present embodiment is a liquid resin that is generally available and usable from domestic and foreign manufacturers. As an example of the present embodiment, a product “Cobasol (registered trademark)” which is a liquid plastic molding material (plastisol) manufactured and sold by Kobayashi Co., Ltd. is applied (see Non-Patent Document 2). “Thermoplastic liquid resin” is a liquid molding material in which a vinyl chloride resin for paste is uniformly dispersed in a plasticizer or the like. “Cobasol (registered trademark)” (see FIG. 3 described in Non-Patent Document 2) begins to gel when heated, then gels and further heats to begin to become molten. At about 180 ° C., the molten state is terminated and a complete molten state is obtained.

In the present embodiment, a wire available from the market (for example, a wire made of stainless steel or steel) is applied as the “metal wire”. Of course, other metallic wires can be applied.

A 1st process First, in order to improve the adhesiveness of the said workpiece | work and resin with respect to the workpiece | work to be coated, the process of degreasing and application | coating of a primer (adhesive for resin) is performed. Then, the workpiece W to be coated and the outer frame body are connected via the metal wire.

Here, in FIG. 2, the workpiece W to be coated and the outer frame body 5 are connected to each other by a plurality (at least three) of wires (corresponding to the metal wire of reference numeral 6 in FIG. 3). It is the top view which shows typically the state of the integrated object of the outer frame 5 and the workpiece | work W before suspension.

An outer frame body 5 illustrated in FIG. 2 is provided with a rotational drive unit (such as a motor) via a bearing portion (corresponding to reference numeral 5RP in FIG. 3) provided on a side surface in the longitudinal direction of the outer wall surface 5OS. It is a rotating frame of a metal body that can be rotated (rotated) to the left and right by the rotation of a shaft (not shown). And the whole center part of the outer frame body 1, ie, the whole area | region enclosed by the inner wall face 5IS, has comprised the through-hole.

In this step, the peripheral frame portion of the outer frame body 5 (the portion sandwiched between the outer wall surface 5OS and the inner wall surface 5IS) and the outer frame portion of the workpiece W (the edge WMAE and the outer surface WOS of the central portion WMA) The portion sandwiched between the plurality of wires 6 arranged at a predetermined interval is below the back surface of the outer frame body 5 (corresponding to reference numeral 5BS in FIG. 3). It is connected so that it can be suspended. That is, the length dimension of each wire 6 which is a metal wire is set so that the workpiece W can be suspended downward and the workpiece W can be immersed. In other words, at the stage of this connection work, each wire 6 can be suspended in the above-described work W and immersed in the liquid resin 8 in the resin tank 7 in a later process. Each wire 6 is loosened.

In FIG. 2, a total of 12 connection points where the peripheral frame portion of the outer frame body 5 and the outer frame portion of the workpiece W are connected by the wires 6 are shown as points P <b> 1 to P <b> 12.

Here, from the viewpoint of enabling the reversing process described later, in principle, the number of the wires 6 constituting the member for connecting the peripheral frame portion of the outer frame body 5 and the outer frame portion of the workpiece W to each other is at least three. It becomes. A central portion 5SP that connects the peripheral frame portions of the outer frame body 5 may be provided in the outer frame body 5, and the wire 6 that connects the central portion 5SP and the central portion WMA of the workpiece W below it (point P13). , P14), the connection between the peripheral frame portion of the outer frame 5 and the outer frame portion of the workpiece W may be reinforced.

Note that a reference symbol WM partially displayed for convenience in the central portion WMA of the workpiece W shown in FIG. 2 is a wire mesh portion of the workpiece W. The wire mesh part WM of the workpiece W may be made of, for example, expanded metal.

As a method of connecting each wire 6 to the peripheral frame portion of the outer frame body 5, one end portion of the wire 6 is directly wound around the frame portion of the outer frame body 5 and coupled to the outer frame body 5. good. Alternatively, a through hole (not shown) is provided at a predetermined connection position of the frame portion of the outer frame body 5, and one end portion of each wire 6 is passed through the through hole, and then the outer frame body 5. Each wire 6 may be coupled to the outer frame body 5 by being wound around the frame portion.

Further, as a method of connecting each wire 6 to the outer frame portion of the workpiece W, as exemplified by a broken line in FIG. 3, the other tip portion 6E (see FIG. 3) of each wire 6 is an umbrella. The distal end portion 6E of each wire 6 may be coupled to the outer frame portion by bending like the shape of the handle and directly locking the curved portion to the outer frame portion of the workpiece W. Alternatively, a through hole (not shown) is provided at a predetermined connection location of the outer frame portion of the workpiece W, and the other tip 6E of each wire 6 is passed through the through hole and then bent. The other tip 6E of each wire 6 may be coupled to the workpiece W by being locked to the frame portion of the workpiece W.

B 2nd process First, the pre-heat processing of the workpiece | work W connected through the peripheral frame part of the outer frame 5 and the wire 6 is performed. In an example of the present embodiment, the drying furnace 3 in FIG. 1 also serves as the workpiece W preheating furnace. For example, an integrated product of the outer frame body 5 and the work W is transported into the drying furnace 3 through a transport process on the rail 4. Then, the integrated product is heated by the drying furnace 3 at a predetermined temperature equal to or higher than the melting state end temperature of the thermoplastic liquid resin 8, for example, at a temperature of 350 ° C. Thereafter, the workpiece W is immersed in the thermoplastic liquid resin 8 so that the temperature of the thermoplastic liquid resin 8 is higher than the melting start temperature in the gelation melting characteristic and lower than the melting end temperature by heat conduction. The integrated product is cooled to a temperature corresponding to the predetermined temperature. For example, when the above-mentioned Covazole (registered trademark) is applied as the thermoplastic liquid resin 8, the predetermined temperature is approximately 170 ° C., and the Covazole (registered trademark) is heated to the temperature by heat conduction. The integrated product is cooled to a temperature that can be obtained.

  In addition, a resin tank in which the thermoplastic liquid resin 8 is put in the outer frame 5 while maintaining the state in which the workpiece W is suspended from the back surface 5BS of the outer frame 5 via the wire 6 extended. 7 is moved or moved toward the upper position.

  Then, as shown in the front view of FIG. 3, the entire workpiece W, the workpiece side connection portion 6CR in the wire 6 and its peripheral portion are immersed in the thermoplastic liquid resin 8 in the resin tank 7. In this process, the integrated body of the outer frame 5 and the workpiece W is lowered and / or the resin tank 7 is raised. In this example, the immersion time is several tens of seconds. In FIG. 3, for convenience, the thermoplastic liquid resin 8 is indicated by hatching, and reference numeral 5 AS corresponds to the surface (upper surface) of the outer frame body 5.

  By this dipping process, the thermoplastic liquid resin 8 in the resin tank 7 is heated to a temperature higher than the melting start temperature and lower than the melting end temperature, and enters a melting progress state. As a result, the molten thermoplastic liquid resin 8 adheres to the entire workpiece W and the portion to be immersed in the wire 6 (the workpiece side connection portion 6CR and its peripheral portion), and the surface of the workpiece W is covered. A covering film is formed.

C 3rd process Next, after taking out workpiece | work W and the workpiece | work side connection part 6CR of the wire 6, and its peripheral part from the resin tank 8, the outer frame body 5 is reversed with the workpiece | work W (180 degree rotation), and the said inversion In the state, the resin 8 is cured, and then the thermoplastic liquid resin 8 attached to the entire surface of the workpiece W and the wire 6 is completely cured through a heating process.

  Here, FIG. 4 is a front view schematically showing a process of taking out the workpiece W and the workpiece side connecting portion 6CR of the wire 6 and the peripheral portion thereof from the resin tank 8. FIG. In this process, the integrated body of the outer frame body 5 and the workpiece W is raised and / or the resin tank 7 is lowered. In FIG. 4, the workpiece W to which the thermoplastic liquid resin 8 adheres as a coating film, the wire 6 and the workpiece side connection portion 6CR are denoted by reference numerals WA, 6A, and 6CRA, respectively. Further, the front and back surfaces of the workpiece W to which the thermoplastic liquid resin 8 is attached are indicated by reference numerals WAS1 and WAS2, respectively.

Then, the integrated body of the outer frame 5 and the workpiece W is conveyed to the installation / reversing device 1 side in FIG. In this state, hardening of the thermoplastic liquid resin 8 adhering to the surface WAS1 of the workpiece W is promoted. On the other hand, the thermoplastic liquid resin 8 in a gelled / semi-molten state adhering to the back surface WAS2 of the workpiece W is dripped by gravity. If this state is left as it is, an uneven portion is formed on the film of the thermoplastic liquid resin 8 covering the back surface WAS2 of the workpiece W. Therefore, as schematically shown in FIG. 5, a rotating mechanism (not shown) rotates the integrated body of the outer frame body 5 and the workpiece W by an angle of 180 ° in one of the left and right directions (rotation). ), By reversing the integrated product, the film of the thermoplastic liquid resin 8 covering the back surface WBS of the workpiece W is flattened and made uniform (a smooth state with no irregularities). This inversion process is the process of the core part in the present embodiment.

  Thereafter, in order to accelerate the curing of the thermoplastic liquid resin 8 adhered on the surface of the work W, the integrated product of the outer frame 5 and the work W is heated to a predetermined temperature by the finishing furnace 3 of FIG. Then, the integrated product is cooled at room temperature. Thereby, the film of the thermoplastic liquid resin 8 attached as a coating film on the surface of the workpiece W is completely cured as a film having a uniform thickness on both sides. The coating of the surface of the workpiece W is realized through such a process.

D Fourth Step Next, the operator sequentially cuts each of the workpiece side connection portions 6CR of the wire 6 using a cutting tool such as a nipper. The remaining portion of the wire 6 remaining on the workpiece WA side by the cutting step can be easily pulled out by hand and discarded. Here, FIG. 6 is a front view schematically showing the state of the workpiece W separated from the outer frame body 5 after the cutting step. As illustrated in FIG. 6, a hole-like trace portion 6 </ b> CRE remains in the coating film on the surface WAS <b> 1 of the workpiece W after cutting, although the size of the coating film itself is small. Even in this state, the overall appearance of the coated workpiece W is much less noticeable and beautiful compared to the conventional case.

In this cutting process, it is only necessary to sequentially cut the workpiece side connecting portion 6CR, which is the base part of each wire 6, with a nipper or the like, so that the work time required for the cutting process is significantly shortened and manufactured. Costs can be significantly reduced.

E Fifth Step Next, as a final step, the hole-like trace portion 6CRE generated by the remaining portion of each wire 6 on the surface WAS1 of the workpiece W is repaired by, for example, filling with resin of the same color as the coating film. (Part PA after repair.) The surface WAS1 is flattened (see FIG. 6). In such a repair process, since the diameter of the cross section of each trace portion 6CRE is about 1 mm to 3 mm, the repair area is greatly reduced as compared with the conventional case. Time is remarkably shortened, and reduction of manufacturing cost is promoted. Moreover, since the surface WAS1 of the work W after the repair is finished as a smooth surface having no irregularities, the overall appearance of the work W is also made cleaner.

(Appendix)
While the embodiments of the present invention have been disclosed and described in detail above, the above description exemplifies aspects to which the present invention can be applied, and the present invention is not limited thereto. That is, various modifications and / or variations on the described aspects can be considered without departing from the scope of the invention.

  The present invention relates to a workpiece manufacturing technique suitable for application to coating of a workpiece made of a metal body such as a floor slat (metal mesh) and subsequent repair processing.

DESCRIPTION OF SYMBOLS 1 Installation and reversing device 2 Immersion device 3 Drying furnace 4 Rail 5 Outer frame 6 Wire made of steel (metal wire)
6A Wire after immersion 7 Resin tank (immersion tank)
8 Thermoplastic liquid resin W Work (metal body: floor slats)
WA Work after immersion

Claims (2)

Connecting the rotatable outer frame and the workpiece with at least three metal wires, and allowing the workpiece to be suspended from the back surface of the outer frame by the at least three metal wires;
In a state where the work is suspended from the back surface of the outer frame body, the outer frame body is moved toward a resin tank containing a thermoplastic liquid resin, and the whole work and the at least three pieces are moved. Immersing each workpiece-side connecting portion of the metal wire in the thermoplastic liquid resin in the resin tank,
After attaching the thermoplastic liquid resin to the entire workpiece and the workpiece-side connection portion of the metal wire by the dipping step, the workpiece and the workpiece-side connection portion of each of the at least three metal wires are After taking out from the resin tank, reversing both the outer frame and the work, and curing the thermoplastic liquid resin attached to the work and the metal wire in the reversed state;
And a step of cutting a connection portion between the metal wire and the workpiece within the workpiece side connection portion of each of the at least three metal wires after the step of curing the thermoplastic liquid resin. A method for manufacturing a workpiece. It is a manufacturing method of the work according to claim 1, Comprising:
A method for manufacturing a workpiece, further comprising a step of filling and repairing a trace portion of the workpiece after cutting the connecting portion of the metal wire with the workpiece.

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