Apparatus for the manufacture of hollow objects of thermoplastic material

Claim 3

The apparatus according to claim 1, wherein said drive source includes translatable spars disposed on opposite sides of said injection mould and parallel with the axis of said injection mould, and said drive source acts directly upon one of said moulds and the drive of said second mould is derived from a part which moves on driving of the first of said moulds.

Claim 4

The apparatus according to claim 2, wherein said translatable spars serve as the drive means for moving a transport device which brings the articles to be manufactured from one of said moulds into the other of said moulds.

Claim 5

The apparatus according to claim 3, wherein said drive means of the transport device is derived from a part which is moved in the driving of said moulds.

Claim 6

The apparatus according to claim 4, including two spars mounted horizontally in the frame on both sides of the injection mould and parallel with the axis thereof for displacement by the drive source, said spars carrying the mould core of mandrel form extending in the axial direction from one end into the injection mould, and a transverse element, said transverse element being connected with the elements of said mechanical linkage means for the opening and closing movement of said blowing mould.

Claim 7

The apparatus according to claim 5, wherein said blowing mould is adapted to be arranged directly beside said injection mould, and the mould core of said injection mould serves as said transport device between said injection mould and said blowing mould and serves also as said blowing mandrel.

Claim 8

The apparatus according to claim 6, wherein said transport device comprises four mould cores or blowing mandrels extending radially outwardly from a rotatable spindle which can be guided successively with intermittent pivoting through 90* each time out of the region of said injection mould into the region of said blowing mould.

Claim 9

An opening and closing device having a frame, drive source and being adapted for moulds employed with synthetic plastic processing machines having an injection mould and a blowing mould, comprising two mould halves carried by pivot arms which are articulatedly connected with one another at their ends remote from said mould halves and upon which guide links act with their one ends, said guide links are articulated with their other ends to the frame and extend substantially in the same direction when the mould halves are closed, while in their pivoting achieved by a displacement of the articulated connection point of the pivot arms they guide the pivot arms apart from one another.

Claim 10

An opening and closing device having a frame, drive source and being adapted for moulds employed with synthetic plastic processing machines having an injection mould and a blowing mould, comprising two mould halves carried by pivot arms which are articulatedly connected with one another at their ends remote from said mould halves and upon which guide links act with their one ends, said guide links are articulated with their other ends to the frame and extend substantially in the same direction when the mould halves are closed, while in their pivoting achieved by a displacement of the articulated connection point of the pivot arms they guide the pivot arms apart from one another.

Claim 11

The apparatus according the claim 8, wherein said drive source including translatable spars cooperatively acting upon the connection joint of the pivot arms of said mould halves.

Claim 12

The apparatus according to claim 9, wherein the opening of the Injection mould, together with the mould core withdrawable from the mould cavity at least parts of the injection mould are movable in the direction of movement of the mould core and in this movement or thereafter are movable apart from one another.

Claim 13

The apparatus according to claim 10, wherein the control of the movement of the movable injection mould parts is effected by the mould core itself or by the parts connected therewith.

Claim 14

The apparatus according to claim 10, wherein the movable mould parts are subject to spring pressure and are movable in the one direction of movement against the pressure of the spring.

Claim 15

The apparatus according to claim 10, wherein the movable mould parts are guided in their movement by slideways and are subject both to the influence of springs which press them in the direction of movement of the mould core and to the influence of springs which hold them in abutment on the slideways and at the same time move them apart.

Claim 16

The apparatus according to claim 10, wherein in the production of a pre-moulding having a threaded bottle neck, a plurality of neck mould pieces are provided for the bottle neck, so as to form a ring which is provided on its outside with a tapered surface widening in the direction of movement of the mould core, said pieces abutting under the influence of springs which spread the ring parts apart upon a corresponding tapered surface of the mould as sliding surface and are guided thereon, and while under the influence of a spring acting in the direction of movement of the mould core they abut on a stop of the mould core or the mounting thereof.