Blow mold device

A blow mold device attaching a plurality of sets of molds in parallel on and between a pair of mold-attaching plates with a clearance defined between adjacent sets of molds, each such one set of molds constituting a pair of split molds forming a blow cavity, wherein;

• one split mold of the pair is attached with a bolt inserted in a loose bolt hole perforated in one mold-attaching plate so that the split mold and the mold-attaching plate can shift laterally and relatively in molds closing as far as within a space formed between the loose bolt hole and the bolt inserted therein,
• the other split mold of the pair is fixedly attached to the other mold-attaching plate with a locating pin implanted in the mold-attaching plate and a bolt, and in molds closing both split molds are connected integrally and closely on both parting faces of them, and both of a taper pin and a socket provided with the pair of molds as a joint operate to secure both the molds mutually so as for a parting line not to fluctuating.