Mold cavity female

Blow molding uses compressed air to blow and expand a hot plastic tube ( rubbery melt ) in a female mold cavity, until the plastic conforms to the walls of the mold. This has developed into a major way to produce plastic bottles, and also more specialized hollow shapes such as fuel tanks, seat backs, tricycles, surfboards, and so on. The leading material is HDPE for milk, water, and household chemicals. Second largest is PET for carbonated beverages. A number of other thermoplastics are blow molded in smaller amounts for more specialized uses. 

Rubber Plug Molding. Liquid silicone rubber is cast into a female mold cavity and cured. The plug is removed, and layers of mat or fabric are built onto the plug. This assembly is then inserted into the mold cavity, pressed, and heated until cured. 

Here compressed air is used to form the sheet. In one variation, a plastic sheet is heated and sealed across the female cavity (Figure 11.14). Air at controlled pressure is introduced into the mold cavity. This blows the sheet upward into an evenly stretched bubble. A plug which fits roughly into the mold cavity descends on the sheet. When the plug reaches its lowest possible position, a vaeuum or, in some cases, air under pressure is used to complete part formation. 

Cavity (female) and Control size, shape, and surface texture of molded article... 

Refer to Fig. 4-26. After the plastic sheet is heated and sealed across the female cavity (A), air is introduced into the mold cavity and blows the sheet upward into a bubble stretching it evenly (B). Normally an electric photocell is used to control the height of the bubble. A plug, shaped roughly to the contour of the cavity, plunges into the plastic sheet (C). When the plug has reached its lowest position, a vacuum is drawn on the cavity to complete formation of the sheet (D). In some instances pressure forming air is also used in this process. 

Cavity. Depression in mold the space inside a mold wherein a resin is poured the female portion of a mold that portion of the mold which encloses the molded article which forms the outer surface of the molded article (often referred to as the die) also, the space between matched molds. (Depending on number of such depressions, molds are designated as Single-Cavity or Multiple-Cavity). The cavity plate accommodates the individual mold cavities, which can be separate assemblies mounted into the cavity plate or, in the case of a single-cavity mold, can be machined directly into the cavity plate itself. 

Cavity Female section of the mold which generally gives the external shape to the product to be molded. 

Matrize (Schablone) template polym (Formwerkzeuge) female mold, cavity, impression (matrix) Mattrand-Objekttrager frosted-end slide Maximalgeschwindigkeit Vtmx Enzymkinetik/Wachstum) maximum rate Maxwell-Kdrper Maxwell element Mazeration maceration mazerieren macerate... 

A positive mold is designed to have a chamber above the cavity that is large enough to completely hold the charge of the molding compound. The force penetrates this chamber and forms with its molding surface together with the female mold the mold cavity (which means that the force immerses into the female mold). 

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