Embossing die

Hot embossing is characterized by low investment for the embossing die or stamp and high efficiency. The layout is applied following injection molding. Because no wet chemistry is needed, hot-embossed MIDs are well suited for decorative surfaces. 

ASTM 255 124 Inserts in wood, plastics, bolt anchors, founding cores and patterns, embossing dies, press-form blocks, dupUcating plaster patterns, mbe bending, and hobbyist pans... 

Rapid prototyping methods are not currently used to produce embossing dies. Nevertheless, when samples and prototypes are produced using hot-embossing techniques, moldings from rapid tooling methods or from nonhardened steel tools can be used (Section 7.2.6). 

Several more recent variations of the film-to-fiber approach result in direct conversion of film to fabric. The film may be embossed in a controlled pattern and subsequently drawn uniaxiaHy or biaxiaHy to produce a variety of nonwoven products (47). Addition of chemical blowing agents to the film causes fibrillation upon extmsion. Nonwovens can be formed directly from blown film using a unique radial die and control of the biaxial draw ratio (48)... 

Sheet can be produced by melt extmsion, but in this case a three-roll stack of quenching roUs is generally used (Fig. 2). More than three roUs may be used where necessary. The roUs may be mounted vertically or horizontally. The web is extmded through a slot die in a thickness close to the desired final thickness. The die is in very close proximity to the first chill roU or chill-roll nip. The web may be cast horizontally directly onto the upper chill roU of the stack as shown (Fig. 2), or it may be extmded into the first nip directly. The roUs quench the sheet and provide the surface polish desired. In some applications, matte or embossed roUs maybe used to impart special surface characteristics for certain functions. Where the utmost in optical (glazing) quality is desired the trend has been to mount the roU stack horizontally. The hot melt is then extmded vertically down into the first nip. This avoids problems associated with sag of a horizontal hot melt no matter how short the distance between die and quench. 

Bonding embossed or die-stamped printed-circuit boards Bonding copper foil to dielectric material (laminates or flexible film)... 

Embossing means above the surface (raised). Debossing means below the surface (recessed). Debossing or embossing may be achieved in a moulding operation by the use of male/female dies with or without heat. Embossing rollers or dies may also... 

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