DE1951058A1 - Process for the production of a zinc injection molding with an imitation wood grain - Google Patents

Description

This involves the production of a zinc injection molding with imitation wood grain

The present invention "relates to the manufacture of a Zinc injection molding with imitation wood grain. In particular, it relates to the manufacture of imitation wood grain having zinc injection-molded pieces that are used as TV mountings or decorative objects, how Aseb.enbechergeh.au3 © j, door frames, can be avoided and for numerous other uses where wood grain zinc injection moldings are desired. Yet in particular, the process described herein has been found to be particularly useful in the manufacture of zinc die cast television screen mounts proven to have the appearance of a wood grain surface, so that it is the Eye appears as if there were the front frame or the chamfer Wood worked on the television set from a night because it looks so much appreciated.

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It has heretofore been common, e.g. B. in the production of τοπ television equipment to use a wood grain outer housing. If the case itself is not out Wood, an alternative consisted of a face veneer or a strip of a 7iny! Polymer that was applied to the basic material from which the housing was made

. was bring. The laminate was from the usual known type, with a paper backing which could be peeled off to expose an adhesive that is used to Attaching the strip to the base material of the housing was used. On the other hand, the plastic strip had an imitation wood surface. However, there are many Difficulties arose when attempting to manufacture a housing of this type with an imitation wood surface, since the technology was and is expensive and time-consuming. furthermore, the laminating strips or appliqué

) s, as they are also called, took off too easily and required additional material or framework to make the To surround the periphery of the lamination material to prevent peeling. Finally the well-known Technical lamination of a material onto a substrate, such as a case, to give it a wood-like appearance, cannot be executed if the base material is used was heavily contoured.

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From the foregoing, there is a need for a process to produce a product with an imitation wood surface that can be used in the construction of television set housings and, in particular, in the cable known as the edging of a television set housing.

The state of the art in the relevant field, as far as it is known to the applicant are those listed below US patents can be found: 3,363,956, 2 O 64 456, 1,685,396, 1,922,548, 2,055,658, 2,254,298, 2,467,229, 3,023,124.

The goal of the invention is now based on the object a method of making a zinc injection molding with imitation wood grain to create «B ,, s injection molding should be able to have numerous contours. According to the invention should also be a television frame made of a zinc injection molding, that has a wood grain surface can be produced. Another feature of the invention is the process of creating the appearance and texture of wood on the surface of a zinc sprayed part to imitate what is used as a television mount or any other product that uses such Appearance is desired, can be used.

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The object is achieved 'by a method for producing an injection-molded piece made of zinc, the surface of which has a has imitated wood grain, which is characterized by: a) providing at least one mold that can be used for the injection molding of zinc, b) providing the inner surface of the mold with a reverse wood grain to the To give zinc an imitation wood grain in the surface, c) injection molding of the zinc, d) application at least a coat of paint with Hilz paint on the grained surface of the zinc injection molding, e) drying of the coat of paint and optionally applying a clear coating. the The invention is intended to become even clearer through the detailed description that now follows.

First, an injection mold or a mold surface is hurried to form the zinc injection molding. The inner one The mold's shaping surface is then textured (textured) so that the mold holds the zinc injection molded part while it is shaped, sifted with a wood grain surface. By this it is meant that the inner surface of the mold is provided with an inverted wood grain, so that after the mold has come into contact with the piece of gas, this leaves the shape with a toothing, which gives its surface a grained appearance, which the of wood corresponds.

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1951053

i) as St ^ alrtuiiefeß des laaesf lache. i @ 2>.'fors done 'preferably by Gravier® !! aä ©,:? to photograph "a suitable" method, sum öravieren or Fotogrsvieres sui * Formation of a f-ria surface, which gaeigaet 1st, a Makgußstück
s5ue grained surface: zu Taa? leih @ r: _f is in the US Patecteohrlft> 052 581 off® »" beard. This technique of photo engraving, that is, of fatomechaisiaehen copying
is the Ijvorvor Predicted Methcäe the inner surface of the shape with
to provide an inverted Eolsa structure, so that it gives the sink an imitated wood grain surface.

However, although engraving is the preferred technique for
If there is an inverted wood grain on the inside surface of the mold, this stage of the process can be used
Carry out the invention using other methods, e.g. B. by milling. A wooden matrix can also be used
(wood master) can be used to form a molding surface thereon, so that the molding surface, which is molded on the wood matrix in one or a series of steps, leaves the molding station with the appropriate inverted wood grain structuring.

After the inner surface of the form has been processed, so

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To have an inverted wood grain, the next step in the process is the injection molding of the zinc article which is used to form the imitated wood grain having zinc injection molded pieces is used. Of the Injection molded zinc shaped article may, of course, be of any desired shape, but has ÄLch the method according to the invention as particularly suitable for the formation of zinc injection moldings with imitated Wood grain proven to be suitable as surrounds for television sets.

The molded zinc injection molding is then removed from the mold taken out and the final refinement of its grained surface is carried out. PUr is the successful implementation of the method according to the invention this refinement is important; it is carried out as follows.

) The grained zinc surface is provided with a base coat of light brown color by spraying. The base coat is then dried at a temperature of approx. 150 ° C (30O ⁰ F).

The paint composition used herein is preferably one based on acrylic resin, urethane resin or alkyd resin

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colour. The best results so far have been obtained with acrylic resin paints. Those involved in this «procedure The colors used can also be air-drying types or those that are dried at elevated temperatures. To be practical and economic point of view

sa

afc general / bevorsagen »dry the color composition at a higher temperature * or sa. Ia general should Temperature range sam drying the paint composition »Between approx. 50 and 210 ° C (120 to 4-10 ° f).

After the base coat has dried, a swelter paint coating to be sprayed on; generally it is a much darker shade of brown. This world The paint coating is then selectively removed, :: · «B. by paint over with a dry brush, a cloth, etc., to give the grained zinc a polished appearance. This second coat of paint is then applied to a Temperature of about 150 ° C (300 ° f) dried, however the drying temperature, as already mentioned, is not critical, it can be varied over a wide range (as indicated above) depending on the particular one color composition used, etc.

Afterwards, a clearer can be applied to the colored zinc injection molding

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Coating can be applied, aa the imitation wood grain aaf de * to protect zinc · The expert is clear about oil Schatsüberzüge known. Ss can e.g. B. a Schatzüberzag aaf Baeiß τοη urethane resins or acrylic resin are used

Finally, the Schatzüberzag is dried; drying can be done at an elevated temperature or at room temperature W , depending on the properties of the aafgetrageaen.

It should be noted that the invention is based on a rich carrion guidebook has been described «, but which does not constitute a limitation of the invention.

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Claims (1)

- 9 patent claims 1. Process for the production of an «injection molded part aas Zinc, the surface of which has an imitated wood grain, characterized by: a) Providing at least one sum injection molding τοη zinc that can be used Fora, b) Providing the inside surface of the mold with an inverted wood grain so that it is one of the zinc imitated wood grain in the surface, c) injection molding the zinc, d) applying at least one coat of wood paint to the grained Surface of the zinc injection molding, e)! Drying of the yarbanstricb.es and, if necessary, applying a clear coating. 2. The method according to claim 1, characterized in that providing the inner surface of the form with an inverted wood grain is made by engraving or photomechanical reproduction. 3. The method according spoke 1, characterized in that a paint based on an acrylic resin, an alkyd resin or a urethane resin, preferably - 10 - 009823/1209 - ι Ο -. wise «lues acrylic resin ·" is used. 4. The method according to Anajruch 1, characterized in that Before carrying out stage d), a light brown wood color was applied. see about 48 ° C (120 ° P) to about 210 ° 0 (410 ° J) dried, then a second wood color of darker «brown is applied, which then selectively by wiping or the like. is removed again in order to give the grained surface a polished appearance, and then this paint is dried at an elevated temperature. 5. The method according to claim 4, characterized in that a clear visor is applied. 6. Application of the method according to claims 1 to 5 for the production of television equipment sockets. 009823/1209