JPH01283199A - Method and apparatus for preparing transfer-printed decorative glass sheet - Google Patents

Abstract

PURPOSE:To accurately and precisely transfer a pattern, by providing a mount means for fixing a heat-resistant press sheet and a packing means composed of a heat-resistant seal member and forming a negative pressure state in a heating tank to hold a close contact state. CONSTITUTION:In a material 1 to be transferred, transfer sheet 3 and a heat- resistant felt material sheet 17 are interposed on the upper surface of said material 1 and a heat-resistant press sheet 4 brought into contact with the transfer paper 3 under pressure from above forms sheet mount parts 7, which are grasped and fixed between packing materials 5, 5', at the end edge parts thereof. At the time of transfer, a heating tank 6 is brought to a negative pressure state and the transfer paper 3 is brought into contact with the surface of the material 1 to be transferred under pressure by the heat-resistant press sheet 4 to make it possible to hold the close contact state at the time of sublimation transfer. The heat-resistant felt material sheet 17 has function for preventing strain cracking and uniformizing heat distribution and is composed of a nylon material. A felt sheet 18 has heat insulating function and prevents the destruction and damage of the material to be transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for producing a decorative glass plate with transfer printing. More specifically, the present invention relates to a method and an apparatus for manufacturing a decorative glass plate with transfer printing, in which sublimation transfer is performed using transfer paper under negative pressure in a heating tank.

(Prior art) Conventionally, methods for applying designs to inorganic materials such as glass plates, metal plates, etc. include printing directly on these materials, as well as printing on the surface of the glass plate, metal plate, etc. on which the design is to be formed. A resin film is formed using a synthetic resin that is easily dyed with sublimation dyes,
A transfer printing method is known in which a transfer paper containing a sublimable dye is heated and pressurized to sublimate the sublimable dye to form a pattern. In these transfer printing methods, a transfer paper is brought into contact with an object to be transferred, and a sublimable dye is sublimated by applying heat and pressure to form a pattern. If the surface is not smooth or uneven,
If there are variations in the shape or size of the product, it is necessary to apply strong pressure by pressing the surface, resulting in product loss if the product is easily broken by pressure. For this reason, a method has been proposed in which, for example, a storage tank for the transfer object is brought into a negative or positive pressure state so that the transfer paper and the surface of the transfer object are brought into close contact with each other.

For example, Japanese Patent Application Laid-Open No. 61-284498 describes a transfer printing method for glass or ceramics, and Japanese Patent Application Laid-Open No. 61-284499
In this issue, the transfer printing method is known, and after inserting the transfer paper between the transferred object and the heat-resistant elastic material, the storage section is set to a negative pressure or positive pressure state, and pressure is applied evenly during the transfer. A transfer method has been proposed in which a transfer paper and a transfer paper are sandwiched to maintain adhesion.

Furthermore, the present inventor has previously proposed Japanese Patent Application No. 314,773 regarding a transfer printing decorative glass plate and a method for manufacturing the same.

(Problems to be Solved by the Invention) In the apparatus for carrying out these above-mentioned methods, at least 200
Since the transfer work is carried out at high temperatures around ℃, the heat-resistant elastic materials conventionally used to press the transfer paper, such as silicone rubber or fluorine rubber, deteriorate with repeated use and their surfaces may deteriorate. There are disadvantages such as wavy swells, shrinkage resulting in insufficient dimensions, rendering it unusable, and tearing, which can have a fatal negative impact on the finish of the transfer product. bring. Furthermore, these materials are relatively expensive, which increases the cost, and their high specific gravity makes them heavy.
It is also troublesome to handle.

Moreover, when using transfer paper to transfer and press these heat-resistant sheets, the sheet repeatedly expands and contracts, and if the edges are fixed, the periphery may be torn. Instead, I set it in a free state and perform the crimping work. Therefore, each time a transfer operation is performed, it is necessary to manually place the relatively heavy sheet onto the transfer paper.

The present invention was arrived at as a result of intensive studies to solve the above problems, and is a transfer method in which a material to be transferred such as glass is placed in a negative pressure state in a heating tank, and a heat-resistant pressure sheet is pressed against a transfer paper for sublimation transfer. The method for manufacturing a printed decorative glass plate includes a mounting means for fixing the heat-resistant pressure sheet and a packing means made of a heat-resistant sealing member, and the adhesiveness between the transferred object and the transfer paper is controlled by creating a negative pressure state in a heating tank. The present invention provides a method for manufacturing a decorative glass plate with transfer printing, which is characterized by holding the plate, and an apparatus therefor.

(Means for Solving the Problems) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory cross-sectional view showing an outline of the apparatus for manufacturing a transfer printing decorative glass plate according to the present invention, FIG. 2 is an enlarged cross-sectional view of one side edge of the apparatus shown in FIG. 1, and FIG. FIG. 1 is a cross-sectional explanatory diagram showing an outline of a sublimation transfer device.

First, in the conventional apparatus shown in FIG. is inserted and arranged, suction is applied from the suction valve 13, and the storage tank 16 is brought into a negative pressure state, and the transfer paper 3 is brought into contact with the transferred object l under heat and pressure to perform sublimation transfer, and after the transfer is completed, the vacuum state is maintained. By opening , the close contact between the transfer target l and the heat-resistant elastic body 12 can be released. In this case, regarding the heat-resistant elastic body 12, the transfer target l is placed on the pedestal 1, and the transfer paper 3 is placed in contact with the upper surface of the transfer paper 3. When fixing the end of the
Since the fixed portions are prone to tearing due to repeated expansion and contraction in the above-mentioned heated state, the structure is such that both ends of the heat-resistant elastic body 12 are simply held in a free state with the fixing devices 15 and 15'. There is.

As shown in FIG. 1, which is an explanatory cross-sectional view showing an outline of the apparatus for producing a decorative glass plate with transfer printing according to the present invention, and FIG. 2
The transfer paper 3 is placed in contact with the upper surface of the transfer target 1, and a heat-resistant felt material sheet 17 is inserted on top of the transfer paper 3. At times, the structure is such that sublimation transfer is performed on the transfer target 1 by pressing with a heat-resistant pressure sheet 4 in a heating tank 6.

The heat-resistant pressure sheet 4, which is pressed from above the transfer IE 3, has a sheet attachment part 7 on both upper and lower sides thereof which is sandwiched and fixed by banking materials 5.5 degrees made of silicone material. In this case, the upper part of the puffing material is omitted, and a soft seal 9, 9° made of fluorine resin is provided on the upper part of the outer frame 8 facing only the lower part, and both of these are clamped with a clamp jig 10 during transfer. It is configured to be fastened.

With the above configuration, a vacuum pump (
(not shown) to create a negative pressure state from atmospheric pressure, and press the transfer paper 3 against the surface of the transfer object 1 with the heat-resistant pressure sheet 4 to maintain adhesion during sublimation transfer. . Reference numeral 19 denotes a filler disposed at a distance from the side wall of the outer frame 8, and a heat-resistant felt material sheet 117 inserted on the upper surface of the transfer object 1 prevents distortion cracking due to rapid cooling and makes heat distribution uniform. It is a sheet of heat-resistant felt material such as nylon material with an appropriate thickness. In addition, the felt sheet (1B) inserted on the lower surface of the transferred object is for heat retention and to prevent damage and damage to the transferred object. May be used.

As described above, in the method for manufacturing a transfer printing glass plate according to the present invention, at the start of transfer, the sheet attachment part 7 and the soft seals 9, 91 are fastened together with the clamp jig 10, and the heating tank 6
At a temperature of 200° C. to 220° C., suction is performed using a vacuum pump, and during the transfer, the object 1 to be transferred and the heat-resistant pressure sheet 4 are brought into pressure contact with each other under a pressure condition lower than atmospheric pressure. It is possible to maintain a state in which the contacting transfer paper 3 is evenly pressed, and after the transfer is completed, the pressure contact between the transferred object l and the heat-resistant pressure sheet 4 can be released by releasing the negative pressure state. .

As described above, the heat-resistant pressurized sheet 4 of the present invention is sandwiched between the upper and lower sides by the packing material 5 in the sheet mounting part 7 in a sandwich-like manner, and depending on the case, the upper banking material may be omitted and only the lower side may be used. It is fastened together with a soft seal 9° 9' provided facing the mounting portion 7 by a clamp jig 10. During transfer, adhesion is achieved by pressing the transfer paper 3 into contact with each other under negative pressure in the heating tank 6, but the sheet 4 must have heat resistance to withstand heating temperatures of at least 200°C, preferably up to 260°C during transfer. It is suitable to have a thermally stable material suitable for repeated use in such a temperature range because the pressure welding is carried out under negative pressure conditions of 200 to 600 w) Ig, preferably 250 to 450 vaHg, and the contraction and expansion are repeated. The essential requirements are that the material has good properties in terms of strength and dimensional stability. More preferably, it is light in weight, for example, 600 g/m or less, and has a breaking strength of 20 to 70 kgf/am without any sagging condition.

From these points of view, fluorine rubber, which has been conventionally used as heat-resistant rubber, has the disadvantage that when it is used frequently, it repeatedly expands and contracts and ages, resulting in cracks and permanent shrinkage, resulting in insufficient dimensions, making it impossible to work. Ta. Moreover, the cost is high, and since the specific gravity is large, it is heavy and inconvenient to handle.Furthermore, in the case where the edge part is attached and fixed to avoid the hassle of overlapping each time during transfer, the fixed part may deteriorate due to repeated heating expansion and aging. It had the drawback of breaking.

Therefore, the present invention provides a sheet made of a composite material such as a fluorine resin-impregnated glass fiber material that has both thermal stability and dimensional stability, as well as bending resistance and abrasion resistance, and is used as a belt member. Tiger Flow A series manufactured by Flow@ is used, and its heat resistance temperature is 260°C, and the thickness is 0.05 to 2, preferably 0.1 to 1.
．． 0 amount, breaking strength 20-70 kgf/cm, weight 60
A value of 0 g/lri or less is suitable.

In addition, in the method of the present invention, the heat-resistant pressurized sheet 4 is held at its peripheral edge by the packing material 5 on the upper and lower sides or on the lower side, and is further tightened with the soft seals 9, 9'' by the clamp jig 10 to be in a fixed state. However, regarding the tensioning conditions of the heat-resistant pressure sheet 4, as shown in Fig. 2), the distance θ between the inner fastened end of the mounting part of the sheet 4 and the edge of the transferred object is determined.
The structure includes an adjusting slack portion 11 having a length equal to or longer than the distance corresponding to the distance. As a result, even if the heat-resistant pressure sheet 4 is stretched or relaxed in a negative pressure state or in its released state, the protruding length of the adjustment slack portion 11 will not have an adjustment effect in both tension and relaxation. This eliminates the problem of sublimation transfer becoming unclear, especially at the edge portions of the transfer object l, without placing excessive load on the heat-resistant pressure sheet 4 and the fixed portion thereof. Images, etc. can be transferred with high precision.

Furthermore, it is appropriate that the seals 9° 9' at the edges of the apparatus according to the present invention have similar thermal stability and dimensional stability. Sealing performance between the mounting portion 7 and the mounting portion 7 can be maintained.

Furthermore, the object 1 to be transferred according to the present invention is not limited to a decorative glass plate, but may also be an aluminum flat plate having a hard surface, ceramics, etc.
It may be tiles or the like.

(Function) Conventionally, a method has been proposed in which a transfer paper containing a sublimable dye is used to transfer onto hard surfaces such as glass or ceramics, but the transfer paper has elasticity and adhesion when pressed onto the transfer target. Pressing with a heat-resistant elastic body such as heat-resistant rubber is common. For this reason, heat-resistant rubber and the like have been used even though they are heavy and expensive.

However, as a result of various studies, the inventor of the present invention found that even when transferring a long object, such as a glass plate, under negative pressure in a heating tank, accurate sublimation transfer can be obtained as long as uniform pressure is applied. We have come to the conclusion that

That is, the heat-resistant pressure sheet 4 of the present invention has thermal stability and dimensional stability in a heated state of 200° C., and the sheet 4 is placed on the transfer paper 3 instead of having adhesive properties such as rubber elasticity. It was concluded that it is possible to transfer the pattern accurately and with high precision by adopting a configuration that allows for even contact.

Also, if the transfer is unclear at the edges of the transferred object, etc.
These problems have been resolved by providing a thermally pressurized sheet with a cushioning function, such as a joint loosening section.

Therefore, the present invention does not have contractility and rubber elasticity that are different from conventional heat-resistant rubber, or if it does have it, it is poor, and thermal and dimensional stability are essential requirements, as well as bending resistance. Also, heat-resistant composite materials such as fluorine-based resin-impregnated glass fibers are used, which have low abrasion properties, high breaking strength, and are light in weight.

Moreover, since conventional heat-resistant rubber repeatedly expands and contracts when heated to 200°C or higher, if the end is fixed, the periphery of that area is likely to tear. However, in the present invention, unlike heat-resistant rubber or the like that has expansion and contraction functions, heat-resistant heat-resistant material made of a composite material that has thermal and dimensional stability is used. A pressure sheet is applied, an adjustment slack part is provided near the attachment fixing part at the edge thereof, and the sheet attachment part 7 sandwiched between the puffing materials 5 is pressed from above the transfer paper 3 so as to cover the lid. Since the sublimation transfer is performed in the heating tank 6, it not only reduces the cost of replacing the heat-resistant elastic body, but also improves work efficiency and enables highly accurate sublimation transfer.

(Effects of the Invention) According to the present invention, a heat-resistant pressure sheet made of a composite member having thermal stability and dimensional stability is provided with an adjustment slack portion at its edge, and is fastened and fixed together with a heat-resistant sealing member. Sublimation transfer is carried out by pressure contact under negative pressure in a heating tank, so when conventional heat-resistant rubber or the like is used to press the transfer paper to the transfer target to obtain the transferred design, the heat-resistant rubber may become permanent due to repeated use. This solves the problems of short lifespans due to shrinkage and aging, and high product costs.

Furthermore, the edge part of the heat-resistant pressure sheet is attached and fixed, and the sheet is brought into contact with the top surface of the transfer paper in a covering manner similar to when a lid is opened or closed, and pressure is applied evenly under negative pressure conditions during transfer. This eliminates the troublesome work of stacking the conventionally heavy i+ heat silver transfer paper on top of the heavy transfer paper for each transfer.Moreover, it is much cheaper than heat-resistant rubber, and its light weight makes it easy to handle. In particular, the effects of improving work efficiency and reducing costs in sublimation transfer of long glass products are remarkable.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing an outline of the apparatus for manufacturing a transfer printing decorative glass plate according to the present invention, FIG. 2 is an enlarged cross-sectional view of one edge of the apparatus, and FIG. 3 is an outline of a conventional transfer apparatus. FIG.

Claims (1)

[Scope of Claims] 1) A method for producing a decorative glass plate for transfer printing, in which an object to be transferred such as glass is brought under negative pressure in a heating tank, and a heat-resistant pressure sheet is evenly pressed onto a transfer paper for sublimation transfer. It is equipped with a mounting means for fixing a heat-resistant pressure sheet and a packing means made of a heat-resistant sealing member, and these are both tightened and placed in a negative pressure state in a heating tank to maintain the degree of adhesion between the transferred object and the transfer paper. A method for producing a decorative glass plate with transfer printing, characterized by carrying out transfer. 2) Claim 1, wherein the heat-resistant pressure sheet fixed by the mounting means is pressed onto the surface of the transfer paper in a covered state and transferred.
Manufacturing method described. 3) Claim 1, wherein the heat-resistant pressure sheet is stretched with an adjustable slack part having a length equal to or longer than the distance θ between the inner fastened end of the mounting part and the edge of the transferred object. Or the manufacturing method described in 2. 4) In an apparatus for manufacturing a decorative glass plate for transfer printing, which applies sublimation transfer by uniformly pressing a transfer paper with a heat-resistant pressure sheet while placing a transfer target such as glass under negative pressure in a heating tank, the heat-resistant pressure sheet is fixed. The apparatus is characterized by comprising a sheet mounting part and a packing part made of a heat-resistant sealing member, which are both tightly fixed and placed in a negative pressure state in a heating tank to maintain the degree of adhesion between the transfer object and the transfer paper. An apparatus for manufacturing a transfer printing decorative glass plate according to claim 1, 2 or 3. 5) Heat-resistant pressure sheet has a heat-resistant temperature of 260℃ and a thickness of 0.05℃.
5. The manufacturing apparatus according to claim 4, which is made of a fluorine resin-impregnated glass fiber material having a thickness of 2 mm and a breaking strength of 20 to 70 kgf/cm.