Injection bladder press

A bladder press comprising a bladder mold including an upper mold part, a lower mold part and a mold core;

• means for squeezing said mold when closed;
• injection means for injecting rubber molding material into said mold to mold a bladder therein;
• means for moving said mold core relative to said lower mold part to strip the bladder from said lower mold part;
• conduit means in said mold core for directing pressurized fluid to an interior surface of a bladder molded onto said mold core;
• and means for supplying pressurized fluid to said conduit means in said mold core automatically in response to movement of said mold core to a position elevated with respect to said lower mold part.

A bladder press comprising a bladder mold including an upper mold part, a lower mold part and a mold core;

• means for squeezing said mold when closed;
• injection means for injecting rubber molding material into said mold to mold a bladder therein;
• a bottom bolster;
• a top bolster to which said upper mold part is attached;
• means connecting said top bolster to said bottom bolster;
• a moving bolster to which said lower mold part is attached, said moving bolster being located between said bottom and top bolster;
• first actuator means supported by said bottom bolster beneath said moving bolster for urging said moving bolster upwardly to squeeze said mold between said top bolster and said moving bolster;
• second actuator means to lower and raise said moving bolster to open and close said mold;
• a mold core support to which said mold core is attached, said mold core support being movable relative to said moving bolster;
• and third actuator means carried by said moving bolster for raising and lowering said mold core support relative to said moving bolster.