| 摘要 |
<p>The present process and apparatus for blow moulding thermoplastic resins, particularly of hollow bodies consists of carrying out, in a first step, a metered injection of resin in thermoplastic state in a first heat conditioning mould formed by narrow tubular cavities having a large surface area, from which, once the resin has attained the thermoelastic state, said resin is extruded in a second step to form a hollow biorientated preform in a second mould where, in a third step the moulding is completed by blowing the preform until the final hollow body is obtained. To this end there is provided a apparatus which may be formed by a group of four premoulding moulds, situated on an upper plane, mounted in crosswise firm and provided with joint reciprocating rotation in 90 DEG and by a group of two blow moulds and two injectors axially facing the premoulding moulds by pairs. The process and apparatus are applicable to the container industry which require very regular walls throughout the body. <IMAGE></p> |
