CS195010B1 - Apparatus for printing textile sheets by thermal print transfer from a pattern sheet - Google Patents

Description

Equipment for printing textile fabric by thermal transfer of printing from the original

The invention relates to a device for printing textile sheets by thermal transfer of a print from a pattern.

Various devices are known for printing transfer textiles and knitted fabrics and the like. E.g. is a known device with a heated cylinder and a pressure bšhounom. This requires, on the one hand, complicated instructions for the fabric and printing paper and other protective paper and, on the other hand, complex and costly accessories, in particular usually oil heater for heating the machine cylinder. The usable printing speed is at most 8 to 10 m / min. Devices with external heating of printing paper by an infrared heater are less complex, but their usable operating speed is at most 4 m / min.

The main drawbacks of the known textile printing apparatuses by thermal transfer of the print from the original, usually paper or other foil, e.g. purchase price of printing equipment.

These drawbacks are due to insufficient holding of printing paper to the printed fabric and insufficient holding time at a suitable reaction temperature. The drawbacks of the prior art are eliminated according to the invention by providing a device for printing textile sheets by thermal transfer of printing from paper skies below. The model consists of a pressurized comex, heated by circulating air, warm 100 to 220%, in which

195 010

195 010 is a driven hollow cylinder, the casing of which is provided with openings along the whole circumference and from the fans and air ducts for suction of air from the cylinder cavity and its forced circulation to the heating element and the plenum chamber. in the front wall of the plenum and guide rollers for introducing the textile sheet and printing pattern onto the driven hollow cylinder in the plenum and discharging it from the plenum. In addition, a ventilator with a throttle and an air duct to the heater and with a partition extending to the casing driven by the hollow cylinder toward the inlet slot in the front wall of the plenum is located in the ceiling of the plenum chamber of the device.

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The device according to the invention is shown schematically in the drawing, in which FIG. 1 shows a side view of the overall embodiment, FIG. 2 shows a plenum chamber and side fans.

The device according to the invention is designed such that, for example, a driven hollow cylinder 2 is located in the plenum 1 (Fig. 1) and fans 1 (Fig. 2) are located on the sides of the plenum 1 to extract air from the cavity of the driven hollow cylinder. .

Furthermore, on both sides of the plenum chamber 1 there are air ducts 1 with connecting ducts, and in the rear wall of the plenum chamber 1 an inlet duct 6 with a heater 2 and in the floor of the plenum chamber an air duct 8.

In the ceiling part of the plenum chamber 1 in front of the partition wall 11 there is a fan 10 with a throttle 12 and an air duct 8 connected by an air duct β. In the front wall of the plenum 1 there is a sealed inlet slot 13 with a guide roller and a sealed outlet slot 14 with a guide roller for the inlet and outlet of the printed fabric 15 and the printing pattern 16 and for their introduction onto the driven hollow roller 2 having a perforated sheath. «P

Into the pressurizing chamber 1 ae, a textile sheet formation, for example, a fabric 15, is introduced, together with a printing paper or similar slot 13 with a guide roller in the front wall of the chamber and further onto a driven hollow cylinder 2 with a perforated sheath. The pressure chamber 1 is heated by air of 100 to 220 ° C, which is ventilated by the fans 2 from the cavity of the driven cylinder and guided by air ducts to the heater 2 and longer into the pressure chamber 1 to heat it to the desired reaction temperature. Forced air circulation creates an overpressure on the outside of the driven hollow cylinder 2 and vice versa in the cylinder cavity. By this pressure difference outside and inside the cylinder, the printing pattern is held on the printed fabric 15 and the reaction temperature causes the printing to be transferred from the pattern 16 to the fabric 15. This avoids mutual displacement and smearing of the printed pattern. Warm air can advantageously be sucked from the inlet part of the plenum 1 and, in turn, sucking in cold air through the inlet slot 13 so as not to transfer printing from the original 16 to the printed fabric 15 before being guided to the driven hollow cylinder 2 and printing originals 16.

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Claims (2)

P & SDMir OF THE INVENTION An apparatus for printing textile fabrics by thermal transfer of a print from a pattern, characterized in that it consists of a pressurized chamber (1) heated by circulating air having a temperature of 100 to 220 ° C, in which a driven hollow cylinder (2) is placed. holes and ventilators (3) on the sides of the chamber (1) and air ducts (4,5) for exhausting air from the cylinder cavities (2) and its forced circulation to the heating element (7) and to the overpressure the chamber (1) and further from the inlet (13) and outlet (14) of the sealed slot with a guide roller for introducing the fabric (15) and the printing pattern (16) onto the driven hollow cylinder (2) in the plenum (1) and of this chamber (1). Device according to claim 1, characterized in that a fan (10) with a throttle (12) and an air duct (9) to the heater (7) and a partition wall (11) extending in the ceiling of the plenum chamber (1) is located. to the housing of the driven hollow cylinder (2) toward the inlet slot (13) in the front wall of the plenum (1). 2 drawings