I. For printing on the surface of the
plastic products, printing or when the pattern, there are several methods.
1, stencil printing of this method is the
most common and also the most one method; their generally suitable for flat or
curvature of the small print.
2, the principle curved surface printing
flexography printing ink is first placed within the text or logo engraved
gravure, then copy the text or images onto a surface, the surface will re-use
the text or pattern is transferred to the surface of the molded product, and
finally through an ultraviolet light irradiation heat treatment or the like so
that the ink is cured.
Surface printing process:
Skim A. molded products
B. molded product surface treatment (when
necessary)
C. Printing
D. curing inks
E. applying post-processing such as
excessive (if necessary)
Printing Process
A. gravure ink into the
B. scrape off the excess ink
C. extruded surfaces made of ink
D. The surface of the ink transferred to
the surface of the molded article
E. cleaning surfaces, layout (if necessary)
and printing will start with version pattern or patterns printed on the plastic
sheet or rubber roller, rubber roller will no longer sheet or pattern or
pattern onto a surface of beer.
Pros: Several colors can be applied in a
single operation.
Disadvantages: lower productivity and not
get opacity strong prints, how to choose a suitable plastic sheet or rubber
roller and oil and so on.
3, the use of hot stamping foil and the
color pattern engraved or font of the hot mold, under controlled temperature
and pressure, the surface of the emboss pattern of manufacturing color package
or method of beer font member, which is mounted on the operation only by fixing
the press hot mold foil color on regional products across the pressure needed
to be applied.
Second, the paint surface treatment of
plastic products (color) of the most commonly used techniques,
Can be divided into: A, general coloring,
that this spray paint mostly by hand, do not have strong abrasion, easy to
paint chips.
B, PU grade varnish this method is finished
after the spray drying primer, then spray on the surface layer of PU varnish
method to achieve abrasion and gloss. General home appliances or many everyday
items is through PU surface treatment.
C, UV grade varnish finish this method
after spray primer and then sprayed with a layer of surface UV varnish, gloss,
feel, rubbing can achieve very good results. General phone mold products,
communications products more die with such an approach.
Fourth, the use of electrolytic plating
method is electroplating the metal or alloy is deposited on the surface, to
form a uniform, dense and good adhesion of metals layers, called plating.
Simple to understand, the physical and chemical changes, or in combination.
Purposes: a. Corrosion b. Protective
decorative c. Anti-wear d. Electrical properties: According parts work
requirements, providing conductive or insulating coating performance e. Process
requirements
The surface of the article by electrolytic
uniform, dense, with good metal or alloy deposited layer forming process, the
process is relatively complicated process, but it has many advantages, such as
many types of deposited metal can be obtained in various colors, with Compare
similar process is relatively cheaper than in terms of prices.
