Engraved mold

Engraved mold Unit cost low Labor cost low Investment moderate Limited Unrestricted Not critical Good durability No extra operations Best for simple lettering and texture. 

Subsequently, finer decorations would be obtained by molding (see Figure 2.4) or stamping on finely engraved molds or carved punches. 

This term is used both to describe designs that are etched or engraved in the mold surface and the process of inserting a printed film into the mold, to be produced as an integral component of the finished product. Etched surfaces can be drawn both parallel and perpendicular to a parting line of molds or postforming in an extrusion line.. However, be alert with molds to the fact that parallel to the parting line additional draft is required. A wide selection of patterns is available and new ones can be readily created. 

Molding- A wood strip having an engraved, decorative surface. 

Cavity numbers should be engraved in the mold. The letters should be 2.4 mm high and 0.18 mm deep. 

Electroformed molds are produced by a process derived from standard electroplating. The metal (usually nickel) is first dissolved and then reassembled electrolytically around a model. By this means a very dense non-porous metal shell is formed, exactly conforming to the three-dimensional contours of the model and, at the same time, able to reproduce fine surface detail, such as textures or engraving. After forming, the shell (which may be up to 10 mm thick) is removed from the model and engineered into a finished mold by various methods, according to the molding process in which it will be used. 

Engraving is tite most ctnnmon method used to machine the information into the mold. As was meaitteened earlier, the mold has the inverse (mirror) appearance... 

If the dNigher wtmts rai letter (or logos, etc.) in the plastic, the mold must be engraved that is, me (usually steel) must beremdved where the information is to appear. This is the sheplest and least e pery method, sime only a minimum amount of meml is removed. 

A sequential number engraved in a mold cavity and reproduced on the molded part for later reference in case a problem ever occurs with the part. 

Charles Goodyear was an uneducated inventor and not a polymer technologist. Nevertheless, his serendipitous discovery of a process for curing (cross-linking) rubber, which is still in use today, has had a profoimd influence on polymer science and technology. If not engraved in stone, his name was molded in rubber when the Seiberling Brothers used his name for their rubber plant in Akron, OH. 

Sound product design is the first step in mold design the mold maker is the last step. The mold maker is a highly skilled craftsman whose judgment and ability are used to duplicate the cavities, hand finish and fit the parts, engrave the lettering, and manufacture the molds. The mold maker s commitment, attention to detail, and pride are as important a contribution as the design itself. 

These molds are usually made from aluminum, often with engraving. For high production rates and intricate surface configuration, electrodeposited shapes (nickel/ copper) backed with cast aluminum are used. 

FIGURE 1.155 Cooling cage for barrel mold made from copper tubing, with two circuits per mold half. In the areas near engravings, the cooling channels are offset. 

Since the 60s, there has been the technology of mold structuring. First, the chemical engraving, which was only occasionally used, found its place quickly. 

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