Machine for producing blown hollow synthetic resin workpieces

Details Machine for producing blown hollow synthetic resin workpieces Machine for producing blown hollow synthetic resin workpieces

1981-09-21

1984-03-27

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

With control means responsive to independently operated timer

264536, 264542, 264543, 425156, 425161, 425162, 425182, 425526, 425527, 425532, 425534, 425541, B29C 1707, B29C 1712

Patent

active

044391277

DESCRIPTION:

BRIEF SUMMARY
The present invention is with respect to a machine for producing blown hollow synthetic resin workpieces with a machine bed, with a delivery unit (and more specially such a unit for delivery by way of an extruder head), with a blow mold shutting unit for taking up the mold halves of a blow mold (having an upright parting plane) at each blow mold support, said blow mold shutting unit being able to be moved between a top parison handing over position under the delivery unit, and a lower blow position which is at a lower level than the handing over position, with at least one blow stick which may be moved for the blow operation into the blow opening of the blow mold in the blow position, and with an after-processing unit for such blown hollow workpieces.
Synthetic resin hollow workpieces, for example as synthetic resin bottles are normally produced from a piece of plastified hollow pipe, extruded by an extruder head in a downward direction, and which is gripped by the two mold halves, able to be moved in relation to each other horizontally, of a two-piece blow mold, and then in a downward direction a blow stick is moved into the cutout designed for it in the blow mold and, at the same time, into the opening turned towards it of the cut-off piece of synthetic resin pipe (parison), the blow stick forming the bottle neck and producing the inner diameter with the right size and furthermore forming the top end face of the bottle neck.
The production rate of machines of the sort in question is, it is true, to a high degree dependent on the rated speed of the machine, but however the speed at which the machine may be run under working conditions is lower than its rated speed inasmuch as the hollow workpieces as taken from the molds and coming from the blow mold shutting unit are so plastic, and for this reason so readily bent or changed in form--at least in the lower end and neck parts--that after-processing of the hollow workpieces, as for example deburring and testing to see that they are fluid-tight, is not possible at once in a fully trued-up position, the wording "trued-up position" being used presently in respect of a completely regular position, which the hollow workpieces, produced one after the other, go into and which as such makes it possible for the tools used for processing the hollow workpieces to take effect completely truly and to be moved into quite the same positions in relation to each and every workpiece. For this reason, in the case of prior art machines, the rate of producing the workpieces had to be slowed down under the rated speed of the machine for the hollow workpieces to be cooled down enough for such after-processing without any loss of the desired form and for this reason without any waste.
For this reason one purpose of the invention is that of increasing the production rate of such a machine even although the hollow workpieces, which are still partly in a plastic condition, are moved generally slowly out of the mold. A further more special purpose is decreasing losses of time, making for a shorter cycle time generally and more specially decreasing the time in which the blow mold shutting unit is not in use, and decreasing the power needed for running the machine.
In this respect the purpose is to be effected in such a way that the machine may be simply run and may be quickly retooled when needed, while on the other hand the price in the first place of the driving system and the size of the systems for control and automatic control are kept low. Furthermore completely regular production of workpieces with unchanging quality is desired.
For effecting this purpose a turntable, designed to be moved in steps, has a number of rests, spaced round its edge evenly, for the blown hollow workpieces and may be moved by a stepping driving system between a take-over position placed at the parting plane of the blow mold shutting unit, and a number of further stations, that is to say at least one after-processing station, in that the blow stick is supported by a blow stick carriage which may be moved

REFERENCES:
patent: 2290129 (1942-07-01), Moreland et al.
patent: 3081489 (1963-03-01), Jackson et al.
patent: 3325862 (1967-06-01), Mehnert
patent: 3429002 (1969-02-01), Saffron
patent: 4124668 (1978-11-01), Frohn

Affiliated with

Also associated with

Rating

Machine for producing blown hollow synthetic resin workpieces does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Machine for producing blown hollow synthetic resin workpieces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machine for producing blown hollow synthetic resin workpieces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1752915