JP2936399B2 - Production method of metal gauze frame for silk plate making - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal gauze frame used for silk plate making.

[0002]

2. Description of the Related Art Generally, a gauze work used for silk plate making is performed by applying an organic solvent from a top surface of a metal frame while the gauze is stretched on the top surface of the metal frame to make a solid state. However, there is a problem that the health of workers is harmed due to the use of organic solvents. Further, in order to re-use, a troublesome operation such as washing and removing the organic solvent fixed to the frame piece is required. In order to solve the problems of the above work, Japanese Patent Application Laid-Open No. Hei 8-3
FIG. 5 shown in JP-A-09957 is described below. The outline of this is as follows.

[0003] That is, four bar frame members 1A having a strip groove a formed in the longitudinal direction of the upper surface are arranged in a square shape, and adjacent portions of the bar frame members 1A are connected by two set screws 6. Thus, a closed annular bone frame 1 is formed.

As shown in FIG. 1B, the rod frame member 1A has two cylindrical ridges c, c in an inner hole b, as shown in FIG. A screw hole for screwing the set screw 6 into the portion is formed.

[0005] A welding strip 7 made of polyethylene is engaged with each groove a of the bone frame 1, and the strip 7 is melted by heat to embed the polyester gauze 3, cooled, and cooled. 1
To be fixed in the extended state.

[0006]

The girder frame of the present invention has been highly evaluated in the art because of its ease of use.

[0007] However, it is necessary to form the welding strip 7 made of polyethylene in each strip groove a of the bone frame 1 and to attach the welding strip 7 to the strip groove a.

The welding strip 7 engaged with the strip groove a is arranged in a square shape on the upper surface of the bone frame 1. The bar frame 1A is located adjacent to the bar frames 1A. A strip-free portion k (FIG. 5A) corresponding to the width dimension of the member 1A on the side of the strip groove a is generated, and this non-existent portion k may be a factor that impairs the expanded state of the gauze 3. The present invention aims to improve the prior art including these problems.

[0009]

In order to achieve the above object, according to the present invention, a metal bone frame having a closed ring is formed. The bone frame may be of an assembling type or an integral type. Further, the upper surface of the bone frame may be subjected to a satin finish in order to strengthen the bond between the bone frame and the synthetic resin layer.

Next, a synthetic resin layer having an appropriate thickness is formed all around the upper surface of the bone frame, that is, a synthetic resin powder made of a material equivalent to polyethylene is laminated on the entire periphery of the upper surface of the bone frame. At the same time, the bone frame and the synthetic resin powder are heated to form a synthetic resin layer adhered to the upper surface of the bone frame.

At this time, the bone frame may be heated before or after laminating the synthetic resin powder.

[0012] The thickness of the synthetic resin layer is about 0.2 for the purpose of upholstery and regeneration thereof, and for maintaining the bonding strength between the gauze and the bone frame.
It is good to make it about 2 mm. Thereafter, a gauze is put on the synthetic resin layer, and a heating body at about 150 to 200 ° C. is pressed from above the gauze to embed and fix the periphery thereof. At this time, the gauze of polyester fiber or the like does not melt because the heat deformation temperature is about 265 ° C., and only the surface of the polyethylene synthetic resin material having a heat deformation temperature of about 70 ° C. is melted. The gauze passes upward through the texture of the gauze and reaches the lower surface of the heating element 7, and the gauze is embedded in the synthetic resin layer.

In the present invention, the formation of the synthetic resin layer in a state of being adhered to the entire periphery of the upper surface of the bone frame eliminates the need for forming and attaching the welding strip, thereby reducing the manufacturing labor. In addition, the spread state of the gauze is good.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the gauze frame manufactured by the present invention, as shown in FIG. 1, a synthetic resin layer 2 made of a polyethylene equivalent material is directly melt-bonded to the entire periphery of the upper surface of the bone frame 1, and the synthetic resin layer 2 The structure is such that the gauze 3 is put on top and embedded and fixed.

At this time, the bone frame 1 may be of an assembling type, but is preferably made of a metal having an integral closed ring. Specifically, the vertical and horizontal members 1a and 1b are formed. Either they are integrally joined by welding, or the whole is integrally formed by casting. The whole shape of the bone frame 1 can be any shape other than the rectangular shape as shown in the figure.

The upper surface of the bone frame 1 is subjected to a satin finish in order to strengthen the adhesion with the synthetic resin layer 2.

The synthetic resin layer 2 is formed so as to have a thickness of about 0.2 to 2 mm with respect to the upper surface of the bone frame 1. Here, when the thickness is smaller than 0.2 mm, it has been found that it is difficult to reliably perform the gauze according to the repeated experimental results of the present invention, and it cannot withstand several reuses. This makes it inefficient for reuse. In order to enhance the adhesiveness, the amount of lamination may be increased. However, when the polyethylene resin is melted and fixed, there is a problem that the resin material flows down to the side of the frame.

A specific example of the method for manufacturing such a gauze frame will be described. As shown in FIG. 2, a bone frame 1 made of an aluminum alloy or the like is prepared, and its upper surface is held in a horizontal state.

Then, a commercially available polyethylene resin powder 2a having an appropriate particle diameter is applied to the entire upper surface of the bone frame 1 by using an appropriate powder feeder to have a layer thickness of about 0.2 to 2 m.
m, and sprinkle from above to laminate.

The product in this state is placed in a heating device and heated to about 300 to 400 ° C. As a result, the polyethylene resin powder 2a is melted to be in a flowable state and adheres to the upper surface of the bone frame.

Thereafter, the bone frame 1 and the polyethylene resin liquid layer are cooled, whereby the polyethylene resin layer 2 having a suitable thickness adhered to the upper surface of the bone frame 1 is formed.

Next, a gauze 3 made of polyester fiber is stretched and fixed on the upper surface of the bone frame 1, and the procedure at this time will be described below.

First, as shown in FIG. 3, the gauze 3 is put on a state in which it is strongly extended on the upper surface of the bone frame body 1 to make the state shown in FIG. 4A, and then, as shown in FIG. The heating element 4 heated to about 150 to 200 ° C. is pressed from above. At this time, the gauze 3 such as polyester fiber does not melt because its thermal deformation temperature is about 265 ° C. Only the surface of the synthetic resin layer 2 of polyethylene having a deformation temperature of about 70 ° C. is melted, and this melted portion passes upward through the texture of the gauze 3 and reaches the lower surface of the heating element 4. The state is embedded in the synthetic resin layer 2.

Such a welding process is performed for each side of the bone frame while moving the heating element 4 or simultaneously by disposing a plurality of heating elements 4. Thereafter, when the gauze 3 is cooled by being left for an appropriate time or the like, the gauze 3 is fixed in an extended state.

After the gauze 3 is fixed, the unnecessary part 3a is removed by pressing and moving the cutting blade of the cutting tool 5 along the periphery of the upper surface of the bone frame 1 as shown in FIG. To

Thus, a gauze frame as shown in FIG. 1 is formed, and the gauze welded portion m of the frame is washed during the plate making process, or is subjected to a printing process after the silk plate making. No problem occurs even if the ink solvent adheres or the washing liquid adheres in the ink washing after the printing is completed.

When a new gauze 3 is put on the used silk plate, the used gauze 3 is appropriately cut with a cutting tool 5, and then the cut end is held in a hand to remove the outside of the bone frame 1. In such a way that the bond between the gauze 3 and the synthetic resin layer 2 is forcibly separated, and the gauze 3 can be easily removed. As a result, the thickness of the synthetic resin layer 2 is reduced by about 0.02 mm).

Thereafter, a new gauze 3 is put on the upper surface of the bone frame 1, and the procedure shown in FIGS. 4A, 4B and 4C is carried out in the same manner as described above.

Such a regenerating process can be performed any number of times while the upper surface height of the synthetic resin layer 2 is higher than approximately 0.1 mm. The synthetic resin layer 2 is supplementarily laminated on the synthetic resin layer 2, and is heated according to the above-described procedure to heat the synthetic resin layer 2.
By forming a new synthetic resin layer 2 by integrating with the above, the present invention can be similarly implemented.

[0030]

According to the present invention constructed as described above, it is possible to solve various problems caused by the conventional laying work using an organic solvent, and to propose Japanese Patent Application Laid-Open No. 8-309957. On the other hand, since there is no portion where the strip material does not exist, the gauze can be fixed to the entire periphery of the upper surface of the bone frame body, and the expanded state of the gauze can be reliably improved.

Therefore, the gauze frame according to the present invention can quickly and inexpensively provide what can be used for printed circuit boards, liquid crystal panels and semiconductor wiring printing which require particularly high printing precision. .

According to the second aspect, the gauze can be reliably and efficiently reused. According to the fourth aspect, the upper surface of the bone frame and the upper surface of the bone frame can be used. This makes it possible to adhere to the synthetic resin layer with difficulty.

[0033]

[0034]

[0035]

[Brief description of the drawings]

FIG. 1 is a view showing a gauze frame manufactured by the method of the present invention.

FIG. 2 is a view showing a process of manufacturing the frame.

FIG. 3 is a view showing a state in which a gauze is put on the frame.

FIG. 4 is a view showing a procedure for welding gauze to the frame.

5 shows a conventional gauze frame body, A is an overall view, B is x
It is -x section sectional drawing.

[Explanation of symbols]

 Reference Signs List 1 bone frame 2 synthetic resin layer 2a synthetic resin powder 3 gauze

Claims (3)

(57) [Claims] 1. A synthetic resin powder of a material equivalent to polyethylene is laminated all around the upper surface of a metal bone frame formed as a closed ring, and the bone frame and the synthetic resin powder are heated to form a bone frame. Form a synthetic resin layer of appropriate thickness glued on the upper surface,
A method of producing a metal gauze frame for silk plate making, wherein a gauze made of polyester fiber or the like is put on the synthetic resin layer, and the periphery is buried by heating and pressing to cool and fix. 2. The synthetic resin layer has a thickness of about 0.2 to 2 mm.
2. The method for producing a metal gauze frame for silk plate making according to claim 1, wherein: 3. The method according to claim 1, wherein the upper surface of the bone frame is subjected to a satin finish.