TW501989B - Three-dimensional thermal transfer printing method - Google Patents

Abstract

This invention relates to a three-dimensional thermal transfer printing method for automatically transfer printing three-dimensional plastic objects with a three-dimensional thermal transfer printing equipment, which includes the following steps: pulling out the transfer printing paper putting between the upper and lower mold sets, and the upper and lower molds; controlling the positioning of the transfer printing paper with an electrical eye; pressing the upper module down to a fixed position for forming a closed space with the transfer printing paper, the lower mold, and the lower mold set, and fixing the transferring paper to wrap the lower mold and the working object; while the upper mold pressing the working object, utilizing high pressure blowing (10 to 35 kg/cm<SP>2</SP>) and high temperature around 100 120 degree C, pushing the silicon film with the same shape as the working object and the transferring paper to fully print the pattern on the transfer printing paper onto the working object; then, retracting the mold and changing the working object. With such continuous cycling, an automated three-dimensional thermal transfer printing method is formed.

Description

501989________________ jff SL a. 11 〆; i, ^ —-Draw 1 image 89123g 翌-Yimu month day correction ... V. Description of the invention (1) ~-[Invention category] / The present invention is to use high pressure 10 ~ 35kg / CNI pushes a heated silicon rubber film and transfer paper with the same shape as the work. [Background of the Invention] Conventional thermal transfer methods include two thermal transfer methods for printing two-D (that is, flat) articles, and three-dimensional thermal transfer methods for printing three-dimensional articles; vertical-thermal transfer methods In terms of water transfer and sublimation transfer and wipe transfer methods, all the conventional thermal transfer methods use manual embossing, but there are a lot of inconveniences due to manual repeated printing. In addition to the manufacturing speed of 1¾, it is easy to produce skews in the upper valley, and it is difficult to accurately ^ print the printed objects on the work accurately, so there is no way to make 2 prints accurately, and then the graphics in the third space It is more complicated, the pattern cannot be accurately positioned, and many dead corners cannot be printed. Even if it is stamped, because the low temperature bite is only overprinted with an adhesive, the pattern adhesion to the work is poor, so it is not strong enough. Protective knee (gloss lacquer) needs to be sprayed to reinforce it to 'prevent falling off due to external force. In addition, although there is an insert mould injection transfer, its equipment cost is high' and it needs to be large Production, high precision requirements, finished small curvature limit, mating difficulties (pumping extension is limited, the thermal transfer paper too frangible). Based on this, the inventor imagines that if it can be produced by an automated machine manufacturing method, the throughput of the thermal transfer industry will be greatly improved; under the inventor's experience in thermal transfer for more than 20 years, Through constant thinking, research and development, and finally, the invention was finally born. 501989 Case No. 89123955 #: _M Revision V. Description of the invention (2) Summary of the invention The present invention is a lower module upper module group for three-dimensional printing of three-dimensional space and moving the upper and lower sliders by 4 daggers. The method of changing the work piece with the same shape of silicon film under the same mold under the same mold and transferring to form a piece of work piece. A three-dimensional thermal transfer method, the first purpose of which is to raise the thermal transfer method, using the three-dimensional thermal transfer equipment, from plastic, the steps include: first pull out the transfer paper between the upper and the mold, and control with the electric eye Position the transfer paper, and then move it to a fixed position so that the transfer paper, the lower mold, and the lower mold close the space to cover the lower mold and the work object. At this time, the work object will be turned by high pressure air blowing and its own high temperature. The pattern on the printing paper is completely printed on the work object. Then, it is continuously circulated so as to become an automatic three-dimensional heat. The present invention is a mechanical production system that transfers the blowing air to the surface. Solution, due to the fully automatic paper positioning of Daolikou, promoting the production of silicone machinery, the advantages of high-pressure air blowing are set to make it complicated to transfer high-pressure equipment, and it is not necessary to spray a three-dimensional machine to the upper mold. The height of the film can be saved-it is a combination of the work papers of the pressure guarantee workers, so that there will be a production method of protecting the paint from the heat transfer. The set of pressing, warm stamping, saving a lot of settings and On the surface of the heat transfer material of the upper mold, the pattern is completely transferred to the paper. The other purpose is to lift the entire roll of transfer paper, press the work piece from the upper mold, and release the film with high pressure. Both use full-automatic manpower and time; and the machine can be set to the required rigorous equipment and the temperature setting of the silicone film is printed with good adhesion, and it can be hot-stamped to the job without any difficulty. On the matter, the problem that the heat-sensitive pressure-sensitive hot-melt adhesive is completely melted is not necessary, and the transfer can be set very accurately.

Page 5 501989-No. 89123955 said to modify (3), as long as it can be used one after another, which can be very accurate without deviation, each position to be printed is stamped. V. Description of the invention The paper positioning electric eye is used to control the objects and work to be printed. The present invention is a three-dimensional thermal transfer method which is the most cost-effective way to perform thermal transfer using high pressure blow to the work object. The complete precision from Nan Wen is summarized as follows: Α. Product can Β. Product can be large, C. equipment into D. Surface light E. The above effect is very effective when transferring The embossing process of thermal embossing of the silicone film between the lower molds. As a result, the present invention can produce individual patterns uniformly and accurately. The cost is low, there is no high slippery, the adhesion is short, and the improvement of plastics is obvious. Your review member described specific examples, explaining that if the position of the post-transfer paper is positioned on the work object, it can be quickly moved between objects. The third purpose is to manufacture, as long as the transfer paper is pulled Method, borrowing the transfer paper without wasting any material can be used to describe the advantages of the "stereothermal transfer method", which can be matched with the product's radian and the radian covers the range of precision requirements. Xiao 'breaks through the traditional transfer method. It is a long way to get to know the present invention, and in accordance with the purpose, features and functions of the attached drawings, to make the present invention. [Example description] Please refer to the first and second transfer paper Section and elevation views, the

01989 amendment

Qin No. 89123955 V. The invention said that the sun and the moon (i) can be made of PVC, pp, opp, pet and other materials. The substrate film (the upper and lower layers are covered with the release layer (71) first and then: The method of brushing and printing ink can be screen printing and gravure

The brush, including the pattern (7 2), is required to make a case, 7 Q,, and the main scroll P. Set the Xitian 舳 r r as the site (73) for the machine to determine the position; heat sensitive pressure heat The melt glue (74) varies according to the plastic, such as PVC 'PC' PE, NYLON, etc., which changes, covers or prints the printing ink protection pattern (72). Yunwei please refer to the third figure. The device of the present invention is divided into three parts: the upper part (22), the transfer paper (11) structure and the lower die (32). The upper die (22), two, according to my needs It is made in accordance with the size of the work (3 4). The upper mold (2 2 is provided with electric heat (25) as the main electric heat source, and the bottom end is provided with silicon rubber. The silicon rubber film (24) is according to the size and material required by us. The mold is made separately, and its shape is the same as that of the work (34), and the reference number 26 is a pressure plate for fixing the silicon film (24); the structure of the transfer paper (η) includes an electric eye (12), automatic positioning and a conveying mechanism (1 3), a clamping mechanism (36) is arranged above the lower film (32), and the clamping mechanism (36) is used for clamping the transfer paper (11) when the transfer paper (π) is transported to the positioning position; The function of the lower mold (32) is to receive the work object 04) and the splint mechanism (36). 'First look at the third picture. When the machine is turned on, the vacuum pump (4) starts to suck the silicon diaphragm (24) through the pipeline to make it close to the mold (22) to conduct heat and store heat. The electric heating temperature is about 120 ~ 20 ° C. The silicon film (24) has a high temperature of 100 to 120 degrees Celsius; pull out the transfer paper (11) 'from the entire roll of transfer paper tube (丨) and pass through the upper and lower modules (2 1), (3 5) and the upper and lower molds (22) and (32). Use the electric eye (12) to fix the position of the transfer paper (U) so that the pattern (72) on the transfer paper (11) Can accurately print the work below (34)

circle_

501989

(24) edge and then press down; when pressed down to half, the transfer paper (丨 丨) is clamped in a fixed position by the edge of the silicone film and the clamping mechanism (36). When continuing to press down, see the fourth picture. The transfer paper (u) is pushed by the work (34). It is clamped by the splint to form a seal in four directions. Although it is extended, its position remains unchanged. V ~ Vacuum pump (4) is closed immediately and changed to high pressure of about 10kg / cnf_ 35kg / cnf air; high pressure gas pushes the silicon diaphragm (24) and every point on the surface of the workpiece (34), the pressure of which depends on the gas. " Li Shi Erding) Tight 22

Evenly, at this time, the silicone film (24) is about to melt the heat-sensitive pressure-sensitive hot-melt adhesive (74) on the transfer paper (11), so that the pattern (72) is completely printed on the work (34). Wait. ’

Then, referring to the fifth figure, the upper mold (2 2) is pressed down to the working object (34) on the lower mold (32), and the vacuum pump (4) is closed and changed to a high pressure, about 10 kg / cm2 — 3 5kg / cm2 air enters; the upper mold (22) has a high temperature of about 150 degrees Celsius, and a silicone film (24) on the surface of the upper mold (22) is pressed down to contact the transfer paper (1 1) to the lower mold. The pressure on the surface of the working object (3 2) on (3 4) depends on the pressure of the air pressure, and it is very uniform. Because the thin film of the monument layer is made of silicone, it can prevent the iron mold from damaging the transfer paper (丨丨) and prevent high pressure gas from leaking out, its shape also changes with the work piece (3 4) to ensure that it can be printed to the dead corner part. The thickness of the silicone film (24) depends on the work piece (34) and does not change. Fixed, but the general thickness is about 0.5mm ~ 3mm, its temperature is about 100 ~ 120 degrees Celsius South temperature; when it reaches about 0 · 5 ~ several seconds, the high pressure is turned off, the vacuum pump starts, the mold rises, Withdraw the mold and take out the work object (3 4) to repeat the action; wherein the curvature or appearance of the surface of the upper and lower molds (2 2) and (3 2) It is a three-dimensional figure matching the working object (3 4); the upper and lower molds (2 2),

Page 8 501989 „t: __Case No. 89123955_ Year Month Amendment _

：-.… —- — fI i. The description of invention (6) (3 2) and the silicone film (2 4) increase in order from bottom to top, respectively, and the increased margin is based on the work ( 3 4). The arrow (8) in the side view in the sixth figure indicates that when the work object (3 4) is replaced, the work platform is moved out in the direction of the arrow (8) to replace the work object (3 4) and then returned to the position. The machinery designed and manufactured by this method can really meet the needs of our people. However, the above is only one possible embodiment of the present invention. For example, any equivalent structural changes made by using the description of the present invention or the scope of patent application should be included in the patent scope of the present invention.

Page 9 501989 __ Case number 89123955_ 年月 日 __ Brief description of the drawings [Illustration of the drawings] The first diagram is a sectional view showing the transfer paper used in the present invention; the second diagram is a diagram showing the present invention. The three-dimensional schematic diagram of the paper tube-shaped transfer paper used; the third diagram is a schematic diagram showing the cross-sectional view of the device using the method of the present invention; the fourth diagram is a schematic diagram showing the upper module of the invention when the slider is pressed down; the fifth The figure is a schematic view showing the work piece being pushed down by the upper mold in the mode of the present invention; the sixth figure is a front view and a side view showing the mechanical structure in the present invention. [Description of component symbols] Transfer paper tube (1) Transfer paper (11) Electric eye (1 2)? Conveying mechanism (1 3) Upper module (21), 'Upper mold (22) Pressure hole (2 3) Silicone film (2 4) Electric heating (25) Press plate (2 6) Slider (3 1) Lower mold (3 2) Work piece (3 4)

Page 10 501989 _ Case No. 89123955 January _ correction diagram brief description of the module (3 5) plywood mechanism (3 6) vacuum pump (4) hydraulic pump (5) high pressure pump (6) film (7) Release layer (71) Pattern (72) Anchor point (7 3) Heat-sensitive hot-melt adhesive (7 4) Arrow (8)

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Claims (1)

501989 ——— Case No. 89123955_Year Month Amendment_ 6. Application for Patent Fan Jie 1. A method of three-dimensional thermal transfer, which pulls the entire roll of transfer paper between the upper and lower modules and the upper and lower molds. Position, then press the upper module down to a fixed position, and use a high pressure blower of 10 ~ 35Kg / cm to push a silicone film and transfer paper that have been heated and have the same shape as the work object, so that the heat on the transfer paper The pressure-sensitive hot-melt adhesive is completely melted, and the cancer solid prints the pattern completely on the work object, and then ejects the mold for another work object to be printed. Among them: In order to make the three-dimensional. Dead corner part completely printed, the upper mold The curvature of the silicone film and the surface of the lower mold or the pattern are matched with the three-dimensional graphics of the work object, and the margins are sequentially increased from bottom to top. The increased margin is measured according to the demand of the work object. The mold and the silicone film are closely adhered together, and the upper mold is heated to 120 to 200 degrees Celsius by electric heat, so that the silicon film also has a high temperature of 100 to 120 degrees Celsius, which can transfer the heat on the transfer paper. The pressure hot melt adhesive is completely melted, and the pattern is indeed Completely and tightly printed on the work. Page 12