CN85200686U - The printing method and apparatus in tranfer printing - Google Patents

Abstract

The utility model relates to a printing method and an apparatus in a transfer printing. Some material, such as the material of which the skin layer is made of ceramics, woods, metals or / and plastics, adopts the technological method of the transfer printing not to directly print, and adopts the following technological method to print. Firstly, a layer of powdered plastic substance is coated on the surface which is to be printed by an electrostatic method, and the powdered plastic substance is preferred to be polyester powder which is combined with base material into a whole after heated. Then, the surface with the coating layer is printed by the technology of the transfer printing. The heat energy of a front heating process can be used in the process of the transfer printing.

Description

The printing method and apparatus in tranfer printing

The present invention is relevant when transfer printing, is not directly carrying out on the materials printed, for example: on the surface of tabular or strip material such as pottery, timber, metal and/or plastics, and a kind of printing process and the device that print.

This transfer printing for the material that printed fabric and some other are easy to absorb sublimable dye, has proved effective through in recent years practice.This method be with dedicated dye by a kind of seal paper that is called transfer paper, at calender or in printing machine, be transferred on the webbing by the heat and the effect of pressure, simultaneously, used dedicated dye is sublimate on the fabric, and bonding on its face.

But this transfer printing can only be used for extremely limited planarizing material so far, can only be used on the fabric substantially, because fabric is easy to absorb printing-ink, and for resembling the such material of timber or sheet material, may not print by present known transfer printing rule.

This class material of printing is carrying out later on through certain corresponding preliminary treatment now, and for example, one enamelled coating of coating carries out later on its face that will print.But this lacquer must contain a kind of softening agent, and softening agent can cause its printed patterns in the shortcoming through mixing after the general time, because softening agent will begin to ooze out.Printing timber normally carries out on the printing machine of costliness.

Task of the present invention is exactly the transfer printing that will solve the tabular or strip material that is applicable to that any material is made.For solving this task, the invention is characterized in: at first with a kind of Powdered plastic substance with electrostatic coating on the surface that will print, and by the heating with matrix material bonding, print with transfer printing then.Be to utilize the heat energy of heating period to come transfer printing at this moment.This method also is applicable to desired device or equipment.

By the applied plastic material, preferably apply polyester and prepare the surface that transfer printing is used.Usually these just can print by transfer printing immediately with the pretreated material of aforesaid way, thereby make transfer printing obtain range of application widely, that is: can be applicable to those and still will change high cost so far and can't reach on the material of gratifying printing quality under the stable condition.The characteristics of this method are to adopt above-mentioned material, just can obtain whole advantages of transfer printing, and particularly investment cost is low, and speed is fast, low price, and the printing quality height, on the color level effect might as well.

When printing the material surface of non-conductive or poorly conductive, before coating powder shape plastic substance, to be coated with the good medium of one deck electric conductivity earlier.This medium makes its surface have electric conductivity.If this medium is a kind of adhesive, then this adhesive has just been born the additional adhesive effect between material surface and the plastic substance.

This new method can be implemented on a printing machine continuously or discontinuously.By means of an embodiment this method is elaborated below.Accompanying drawing has symbolically been represented a main member of implementing the equipment of this method with continuously-running duty.

In a container made from conductive material (1), polyester powder is housed.The negative pole of this container and a high voltage source joins.Container bottom has sieve aperture, and the powder that comes out through these mesh screens also all has negative electricity simultaneously.There is a goods band (2) the container below.This goods band for example can be made by aluminium sheet by metallic plate in an embodiment.The goods band has positive electricity.Can support the powder of sieve aperture bottom container (1) in a known manner by roll brush.Polarity between container and the goods band also can be turned around.This class coating device itself is known, thereby does not need to describe in detail again.Voltage between the coating device electrode is preferably between 80 to 100 kilovolts.Electric current is between 0.5 to 5 milliampere during running.Usually container (1) is expressed as an electrostatic coating device, and this equipment also can embody by a paint spray gun.Its electrostatic force can depend on known way, for example can support by roll brush by compressed air and other means.Arrow (3) is symbolically represented to be coated in plastic powders on the goods band (2) by electrostatic force.

As long as a goods band of printing usefulness is to be made by the material of non-conductive or poorly conductive, will container (1) before, at coating one deck good medium of electric conductivity under DC voltage on the goods band, preferably apply one deck suitable adhesive.This adhesive can conduct electricity, plastic powders and goods band can be bonded together again.The metallic plate of also configurable its sizableness container (1) scope in goods band below.By this measure, above the goods band, remove one deck electrostatic powder equably.Wherein polyester powder is suitable especially, because polyester can absorb transfer ink.If will be imprinted on during transfer printing on the plastic layer of band look, then also can use band look polyester powder.Should preferentially select for use polyester powder and not fade through solarization to keep printed matter.

On the throughput direction (4) of goods band, there is a dry channel (5) back of electrostatic coating equipment and container (1), in it, the goods band (2) that scribbles plastic powders and scribble adhesive in case of necessity is heated to uniform temperature, between 150 ℃ to 220 ℃, thereby plastic powders melted.

And then, this treated goods take to and reach station (6), and carry out transfer printing in this station.In addition, the transfer paper between two cylinders (8) is closely contacted with treated goods band.Simultaneously, printed patterns by transfer paper (7) transfer to goods band (2) above, this is to have produced this transfer under the situation of having used heat and pressure.And used transfer paper derived at station (9).In printing process, this paper is supported by an endless belt (10).

Like this, when these procedure of processings are finished, just obtained goods band (2) through printing.

Described method also can be implemented discontinuously, and can carry out in a printing machine.Goods band or the sheet material made by conductive material need correspondingly with static the plastic substance coating in the above with ready, and are melted in the above and transfer printing on printing machine at last.

When brush product band is made by non-conducting material, before electrostatic coating, to apply with adhesive or with another kind of conducting medium.

Yin Shua surface is definitely wear-resisting, sun-proof like this, and meets food law.

Claims (1)

1, be used at transfer printing, not directly carrying out on the materials printed, for example by ceramic timber, the device that prints on the surface that metal and/or plastic or other material are made, it is characterized in that: on the throughput direction (4) of its conveying device, dispose the station (1) that is used for going up the Powdered plastic substance of electrostatic coating continuously in the surface that will print (2), after having a baking oven (5) again a thermal printer that does not heat (6) is arranged thereafter, simultaneously, distance between baking oven (5) and the thermal printer (6) is very little or the transporting velocity of conveying device is very fast, makes to print, and adding overheated surface temperature in baking oven (5) is enough in the hot stamping process of thermal printer (6).

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