JPH0798438B2 - Transfer printing decorative glass plate manufacturing method and apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for manufacturing a transfer printing decorative glass plate. More specifically, the present invention relates to a method and apparatus for manufacturing a transfer printing decorative glass plate in which sublimation transfer is performed using a transfer paper in a heating tank in a negative pressure state.

(Prior Art) Conventionally, as a method of applying a design to an inorganic material such as a glass plate or a metal plate, in addition to a method of directly printing on these materials, a surface of a glass plate, a metal plate or the like on which a design is formed is used. Form a resin film with a synthetic resin that is easy to dye with sublimable dyes,
A transfer printing method is known in which a transfer paper containing a sublimable dye is heated and pressed to sublimate the sublimable dye to form a pattern. In these transfer printing methods, the transfer paper is brought into contact with the transferred material, and heated and pressed to sublimate the sublimable dye to form a pattern. In this case, when the transfer paper is pressure-bonded to the transferred material, If the surface has irregularities that are not smooth,
If there are variations in the shape and size of the product, strong pressure must be applied by surface pressing, and product loss occurs for items that are easily broken by pressure. Therefore, for example, a method has been proposed in which the transfer paper and the surface of the transfer target are brought into close contact with each other by setting the storage tank of the transfer target under a negative pressure or a positive pressure.

For example, JP-A-61-284498 discloses a transfer printing method such as glass or ceramics, and JP-A-61-284499 discloses a transfer printing method, in which a transfer paper is placed between a transfer target and a heat resistant elastic body. A transfer method has been proposed in which the storage unit is placed in a negative pressure state or a positive pressure state after being inserted, and the pressure is evenly applied during transfer to sandwich the transfer target and the transfer paper to maintain the degree of adhesion.

Further, the present inventor has previously proposed Japanese Patent Application No. 314773 regarding a transfer printing decorative glass plate and a method for producing the same.

(Problems to be Solved by the Invention) In an apparatus for carrying out these above-mentioned methods, at least 200 ° C. for heat transfer of a sublimable dye contained in a transfer paper.
Since the transfer operation is carried out at a high temperature in the front and rear, a heat resistant elastic body such as silicone rubber or fluorine rubber which has been conventionally used for pressure-bonding a transfer paper is not repeatedly deteriorated by repeated use, and its surface is corrugated. There is a problem that swelling of the shape occurs, it becomes unusable due to dimensional insufficiency due to contraction, and it may break.
Due to these, there is a fatal adverse effect on the finish of the transfer product. Further, these materials are relatively expensive, resulting in an increase in cost, and because they have a high specific gravity, they are heavy and cumbersome to handle. Moreover, when a transfer paper is conventionally used for transfer press contact of these heat-resistant sheets, since the sheet repeatedly expands and contracts, fixing the edge of the sheet may cause the peripheral edge of the sheet to be broken. Instead, they are set in the free state as they are placed and the crimping work is performed. For this reason, each time the transfer operation is performed, it is inevitable that the relatively heavy sheet is manually placed on the transfer paper.

The present invention has been achieved as a result of intensive studies to solve the above-mentioned problems. A transfer is performed by sublimation transfer by press-contacting a transfer paper with a heat-resistant pressure sheet with a transfer target such as glass being in a negative pressure state in a heating tank. In the method for producing a glass plate for decorative printing, a mounting means for fixing the heat-resistant pressure sheet and a packing means composed of a heat-resistant sealing member are provided, and the degree of adhesion between the transfer target and the transfer paper is kept negative in the heating tank. The present invention provides a method for manufacturing a glass plate for decorative printing by transfer printing, which is characterized by being held, and an apparatus therefor.

(Means for Solving the Problems) Hereinafter, a detailed description will be given with reference to the drawings illustrating an embodiment of the present invention.

FIG. 1 is a sectional explanatory view showing an outline of an apparatus for producing a transfer printing decorative glass plate according to the present invention, FIG. 2 is an enlarged sectional view of one side edge portion of the apparatus of FIG. 1, and FIG. It is a section explanatory view showing an outline of a sublimation transfer device.

First, in the conventional apparatus shown in FIG. 3, the heater 14 is installed in the storage tank 11, the transfer target 1 is placed on the pedestal 2, and the transfer paper 3 is placed between the transfer elastic member 12 and the heat transfer elastic body 12. And place
Suction is performed from the suction valve 13, the storage tank 16 is placed in a negative pressure state, and the transfer paper 1 is heated and pressure-contacted to the transfer target body 1 to perform sublimation transfer. After the transfer is completed, the negative pressure state is released to transfer the transfer target material. The close contact between the body 1 and the heat resistant elastic body 12 can be released. In this case, regarding the heat-resistant elastic body 12, the transferred body 1 is placed on the pedestal 2 and the transfer paper 3 is placed in contact with the upper surface thereof. When fixing this, the ends of the heat-resistant elastic body 12 have a drawback that the fixed parts are likely to tear due to repeated expansion and contraction in a heated state of 200 ° C. or more. The structure is such that it is only pressed by 15 '.

As shown in FIG. 1 which is a cross-sectional explanatory view showing an outline of an apparatus for manufacturing a transfer printing decorative glass plate according to the present invention and an enlarged cross-sectional view of one end edge portion of the apparatus in FIG. Two
The transfer sheet 3 is placed on the upper surface of the transfer target sheet 1 with the felt sheet 18 interposed therebetween, and the heat-resistant felt material sheet 17 is inserted on the transfer sheet 3 on the upper surface of the transfer target 1. In the heating tank 6, the heat resistant pressurizing sheet 4 is brought into pressure contact with the transferred material 1 to perform sublimation transfer.

The heat-resistant pressure sheet 4 that comes into pressure contact with the transfer paper 3 from above is
At its edge, a sheet mounting portion 7 is formed on both upper and lower sides, which is sandwiched and fixed by packing materials 5 and 5'made of silicone material. A soft seal 9.9 'made of a fluorine-based resin is provided on the upper side of the outer frame 8 facing each other, and both of them are fastened by a clamp jig 10 at the time of transfer.

With the above structure, during transfer, a vacuum pump (not shown) is used to suck in the direction A in the heating tank 6 to bring the transfer paper 3 onto the surface of the transfer target 1 with the heat-resistant pressurizing sheet 4. Adhesion can be maintained when sublimation transfer is performed by pressing. Reference numeral 19 denotes a filler arranged at a distance from the outer wall of the outer frame 8, and the heat-resistant felt material sheet 17 inserted on the upper surface of the transferred body 1 prevents strain cracking due to rapid cooling and makes the heat distribution uniform. It is a heat-resistant felt material sheet such as nylon material having an appropriate thickness. Further, the felt sheet 18 inserted on the lower surface of the transferred material is used for keeping heat and preventing damage and damage to the transferred material. It is expensive if necessary, but the same heat-resistant felt material sheet as the one inserted on the upper surface is used. May be.

As described above, in the method for producing a transfer printing glass plate according to the present invention, the sheet mounting portion 7 and the soft seal are used at the start of transfer.
Clamping 9,9 'with the clamp jig 10
Suction is performed with a vacuum pump at a temperature of ℃ to 220 ℃, the transfer target 1 and the heat-resistant pressure sheet 4 are pressed against each other during the transfer in a negative pressure state than the atmospheric pressure, and contact the transfer target 1. It is possible to maintain the state in which the transferred transfer paper 3 is evenly pressed, and release the negative pressure state after the transfer is completed, so that the pressed contact between the transfer target 1 and the heat-resistant pressure sheet 4 can be released.

As described above, the heat and pressure resistant sheet 4 of the present invention may be sandwiched between the upper and lower sides by the packing material 5 in the sheet mounting portion 7 in a sandwich state, and in some cases, the upper packing material may be omitted and only the lower side may be provided. It is fastened by a clamp jig 10 together with soft seals 9 and 9'provided opposite to the mounting portion 7. At the time of transfer, the transfer paper 3 is pressed under pressure in the heating tank 6 by a pressing action to obtain adhesion, but the sheet 4 has heat resistance to withstand a heating temperature of at least 200 ° C., preferably 260 ° C. at the time of transfer. It is suitable to provide and thermal contraction and dimensions suitable for repeated use in such a temperature range because pressure shrinkage and expansion are repeated under a negative pressure condition of 200 to 600 mmHg, preferably 250 to 450 mmHg. Stability It is essential to have qualitative characteristics. More desirably, the weight is light, for example, 60 without sagging.
Those having a breaking strength of 20 to 70 kgf / cm at 0 g / m ² or less are suitable.

From this point of view, the fluorine rubber, which has been conventionally used as a heat-resistant rubber, has a problem that when it is frequently used, expansion and contraction repeatedly and aging cause cracks and permanent shrinkage, resulting in insufficient dimensions, which makes work impossible. there were. Furthermore, the cost is high, and the specific gravity is large, which is heavy and inconvenient in handling.Furthermore, when the edge is attached and fixed to save the trouble of overlapping each time at the time of transfer, the fixing part is repeatedly heated and expanded, and the fixed part is aged. There was a flaw that could break.

For this reason, in the present invention, a sheet made of a composite member which is used as a belt member such as a fluorine resin-impregnated glass fiber material having both heat stability and dimensional stability and flex resistance and abrasion resistance, Nippon Tiger Flow Co., Ltd.
Manufactured by Tiger Flow A series, its heat resistant temperature is 260 ℃, thickness is 0.05-2mm, preferably 0.1-1.0mm,
A breaking strength of 20 to 70 kgf / cm and a weight of 600 g / m ² or less are suitable.

Further, in the method of the present invention, the heat-resistant pressurizing sheet 4 is clamped at its peripheral edges by the packing material 5 on the upper and lower sides, and further clamped by the clamp jig 10 together with the soft seals 9 and 9'to be in a fixed state. However, the tension condition of the heat resistant pressurizing sheet 4 corresponds to the distance θ between the fastening end portion inside the mounting portion of the sheet 4 and the end edge portion of the transfer target as shown in FIG. It has a configuration including an adjustment slack portion 11 having a length equal to or greater than the distance. As a result, even when the heat-resistant pressurizing sheet 4 is pulled or relaxed in the negative pressure state or the open state thereof, the adjustment action is performed regardless of whether the protruding length of the adjustment slack portion 11 is tension or relaxation. Therefore, the heat-resistant pressure sheet 4 and its fastened fixed portion are not excessively weighted, and the problem that the sublimation transfer becomes unclear especially at the edge portion of the transfer target 1 is solved, and the pattern is Etc. can be accurately transferred.

Further, it is appropriate that the seals 9 and 9'on the edge portions of the apparatus according to the present invention also have thermal stability and dimensional stability. For example, a gasket made of a fluorine-based resin material is used, whereby a sheet is transferred at the time of transfer. It is possible to maintain the sealing property with the mounting portion 7.

Further, the transferred material 1 of the present invention is not limited to a decorative glass plate, but may be a flat plate such as an aluminum flat plate or pottery having a hard surface,
It may be a tile or the like.

(Function) Conventionally, a method has been proposed in which transfer is performed on a hard surface such as glass or pottery by using a transfer paper containing a sublimation dye, but it has elasticity and adhesiveness when pressure-bonded to a transfer target. Pressing by a heat resistant elastic body such as heat resistant rubber is generally used. For this reason, heat-resistant rubber and the like have been used although they are heavy and expensive.

However, as a result of various investigations by the present inventors, even when transferring a glass plate or the like of a long material in a negative pressure state in a heating tank, an accurate and accurate sublimation transfer can be obtained as long as uniform pressure contact can be made. It came to the knowledge that. That is, the heat-resistant pressure-sensitive sheet 4 of the present invention has thermal stability and dimensional stability as essential constitutional requirements in a heated state of 200 ° C., and the sheet 4 is not placed on the adhesiveness such as rubber elasticity but on the transfer paper 3. We have reached the conclusion that it is possible to transfer the pattern accurately and accurately by adopting a configuration in which they abut. Further, the transfer unclear point at the edge portion of the transferred material can be eliminated by providing the heat-resistant pressure sheet with a cushioning function such as an adjustment slack portion.

Therefore, in the present invention, there is no shrinkage and rubber elasticity different from conventional heat resistant rubber or the like, or even if there is, it is poor, heat and dimensional stability are essential requirements, and flex resistance is also In addition, a heat resistant composite material such as glass fiber impregnated with a fluorine resin is used, which has low abrasion resistance, high breaking strength, and light weight.

In addition, conventional heat-resistant rubber repeats expansion and contraction under heating at 200 ° C or more, so if the ends are fixed, the peripheral edge of the part is easily broken. Also, a heavy heat-resistant rubber is used for each transfer. It was necessary to superimpose it on the transfer paper 3 in contact with the heat transfer sheet. However, in the present invention, unlike the heat resistant rubber having the functions of expansion and contraction, the heat and pressure resistant composite material having heat and dimensional stability is used. Apply the sheet,
An adjusting slack portion is provided near the mounting and fixing portion of the end edge portion, and the sheet mounting portion 7 sandwiched by the packing material 5 is pressed against the transfer paper 3 so as to cover the lid, and is then heated in the heating tank 6. Since sublimation transfer is carried out, not only the cost for exchanging the heat resistant elastic body but also work efficiency can be improved and sublimation transfer can be performed with high accuracy.

(Effects of the Invention) According to the present invention, a heat-resistant pressure-sensitive 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 seal member. Since sublimation transfer is performed by pressing in a heating tank in a negative pressure state, when a transfer pattern is obtained by crimping the transfer paper to the transfer target with a conventional heat resistant rubber, the heat resistant rubber is permanently used by repeated use. It is possible to solve the problems that the life is short due to shrinkage and aging and the product cost is increased.

Further, the heat-resistant pressure sheet is configured such that the edge portions thereof are attached and fixed, and the sheet is brought into contact with the upper surface of the transfer paper by a method of covering the sheet such as the opened / closed state of the lid, and evenly pressed under negative pressure conditions during transfer. Therefore, the complicated work of stacking a heavy heat-resistant rubber on the transfer paper for each transfer can be omitted, and the price is much lower than the heat-resistant rubber, and the weight is light and easy to handle. In particular, the effects such as improvement of work efficiency and cost reduction in sublimation transfer of long glass products are remarkable.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an outline of an apparatus for producing a transfer printing decorative glass plate according to the present invention, and FIG. 2 is an enlarged sectional view of one end edge portion of the apparatus, and FIG. 3 is an outline of a conventional transfer apparatus. FIG. 1 ... Transferred object, 2 ... Stand, 3 ... Transfer paper, 4 ... Heat resistant pressure sheet, 5 ... Packing material, 6 ... Heating tank, 7
...... Seat mounting part, 8 …… Outer frame, 9,9 ′ …… Soft seal, 10 …… Clamp jig, 11 …… Adjustment slack part, 12 …… Heat resistant elastic body, 13 …… Suction valve, 14 …… Heater, 15,1
5 '... Fixing device, 16 ... Storage tank, 17 ... Heat-resistant felt sheet, 18 ... Felt sheet, 19 ... Filling device

Claims (5)

[Claims] 1. A method for producing a transfer-printing decorative glass plate, which comprises subjecting a material to be transferred such as glass to a negative pressure state in a heating tank in a heat-resistant pressure sheet so that the transfer paper is evenly pressed and sublimated and transferred. A mounting means for fixing the sheet and a packing means composed of a heat-resistant sealing member are provided, and both are fastened to each other to make a negative pressure state in the heating tank so as to maintain the degree of adhesion between the transferred body and the transfer paper and perform the pressure transfer. A method of manufacturing a glass plate for decorative printing by transfer printing, which comprises: 2. The manufacturing method according to claim 1, wherein the heat-resistant pressure-sensitive sheet fixed by the mounting means is pressed against the surface of the transfer paper in a cover state to transfer the sheet. 3. A heat-resistant pressure sheet is stretched with an adjusting slack portion having a length equal to or more than a distance .theta. Between a fastening end portion inside the mounting portion and an end edge portion of a transfer target. The manufacturing method according to claim 1. 4. An apparatus for producing a transfer printing decorative glass plate, wherein a material to be transferred such as glass is placed in a heating tank under a negative pressure and the transfer paper is evenly pressed and sublimated and transferred to a transfer printing decorative glass plate. It is equipped with a sheet mounting part that fixes the sheet and a packing part that consists of a heat-resistant seal member.These two parts are clamped and fixed so that a negative pressure state is maintained in the heating tank to maintain the adhesion between the transfer target and the transfer paper. The apparatus for producing a transfer printing decorative glass plate according to claim 1, 2 or 3. 5. The heat resistant pressure-sensitive sheet has a heat resistant temperature of 260 ° C. and a thickness of 0.0.
The production apparatus according to claim 4, which is made of a glass fiber material impregnated with a fluororesin having a breaking strength of 5 to 2 mm and a breaking strength of 20 to 70 kef / cm.