Female mold including decorating insert for differential pressure forming

A female mold for differential pressure forming an article in a sheet of thermoplastic material comprising:

• a mold body having a mold cavity therein;
• means for applying differential pressure to opposite sides of a portion of said sheet in said cavity to form an article in said sheet;
• a replaceable mold liner received by said cavity for forming a portion of the wall of an article to be formed wherein said replaceable mold liner comprises
• a one-piece, annularly disposed sheet having opposite ends in abutting relation;
• and
• means on said body for detachably securing said mold liner to said body.

Apparatus for differential pressure forming an article having a predetermined axis in a sheet of thermoplastic material comprising:

• a differential pressure mold including a female mold cavity having an axially outer open end and a closed axially inner end;
• means for applying differential pressure to a portion of said sheet to axially inwardly draw said sheet portion to form an article in said cavity;
• a replaceable, hollow mold sleeve insert detachably disposed in said cavity for forming at least a portion of said article;
• said sleeve having a side wall which flares radially outwardly in an axially outward direction.

Apparatus for differential pressure forming an article in a sheet of thermoplastic material comprising:

• a mold base having a female mold cavity therein;
• means for applying differential pressure to a portion of said sheet of material to form an article in said cavity;
• a detachable inscription insert detachably received in said cavity comprising a crescent shaped sheet of material having opposite ends rolled into a truncated cone with said opposite ends in abutting relation;
• and
• means for detachably retaining said insert in said cavity.

Apparatus for differential pressure forming an article in a sheet of thermoplastic material comprising:

• a mold body including a mold cavity therein having an axially outer, open end, and an axially inner closed end;
• means for applying differential pressure to a portion of said sheet in said cavity to form an article in said portion of said sheet;
• a one piece, annularly disposed, detachable mold insert received in said cavity and including decorating means for defining the shape of a portion of said article being formed;
• and
• means for detachably securing said insert in said cavity;
• said insert including a side wall with a main tapered sidewall section flaring radially outwardly in an axially outward direction.

Mold apparatus for forming an article in a sheet of thermoplastic material comprising:

• a mold base having an end wall defining an end portion of a mold cavity;
• an annular mold ring mounted on said base and defining a recess;
• a hollow one piece mold insert comprising
• a sheet of material having opposite ends and rolled into an annular shape with said opposite ends disposed in abutting relation and received in said recess to form the shape of a side wall portion of the article;
• and
• means detachably mounting said mold insert on said mold body.

Differential pressure mold apparatus for forming an article in thermoplastic material comprising:

• a mold base forming an end of a female mold cavity having a longitudinal axis and adapted to receive said theremoplastic material;
• a mold ring detachably mounted on said mold base and including an annular internal support surface;
• a sleeve insert detachably mounted on said base and bearing against said surface to form at least a portion of said female mold cavity;
• and
• means detachably mounted on said mold ring for detachably securing said sleeve insert.