Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For press shaping surface
Patent
1992-05-28
1994-02-08
Timm, Catherine
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For press shaping surface
425192R, 425522, 425532, 249102, 29428, 264523, 264540, B29C 4928
Patent
active
052844323
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a plastics processing machine and to a process for rapid change-over of the plastics processing machine from a first product mould to a second product mould.
BACKGROUND OF THE INVENTION
A plastics processing machine of the type mentioned above may, for example, be an injection moulding machine or a blow moulding machine; such plastics processing machines are generally known.
These machines have certain problems relating to process limitations. For example, a manufacturer of plastics hollow bodies may have only one blow moulding machine available, on which he normally manufactures large-volume vessels having a volumetric capacity of for example 220 1. If such a manufacturer were to receive a limited order, for example for 60-liter plastics canisters, which he would like to fill, present equipment will require that the blow moulding machine be brought to a standstill and the blowing mould for the 220-liter vessels be demounted from the mould clamping plates. Peripheral supply lines must also be demounted. Thereafter, a smaller blowing moulds halves for the 60-liter plastics canister would be secured to the mould clamping plates and the appropriate operating means lines, for example for electrical energy, hydraulic oil or cooling water, would be attached. After fulfilling the canister order, further production of the 220-liter vessels again will require a reverse procedure and reassembly of the larger product moulds. As a result, comparatively long standstill times and high breakdown costs occur at the blow moulding machine. The same is true for an injection moulding machine when changing injection moulds. Here, even with relatively short standstill times, comparatively high production losses result, since with an injection moulding machine it is usual for larger unit quantities of products to be achieved than for example with a discontinuously operating blow moulding machine.
SUMMARY OF THE PRESENT INVENTION
It is thus the object of the present invention to specify process engineering and constructional measures which make it possible in a simple and low-cost manner to rapidly change over a plastics processing machine from one product mould to another second product mould and to keep the machine breakdown times caused thereby as low as possible.
This object is achieved within the realm of process engineering, in accordance with the invention, with a plastics processing machine having a mould divided into two, with the mould halves secured to two mould clamping plates which may be moved apart for product removal. Specifically, the mould halves of the first product mould remain on the mould clamping plates, and the mould halves of the second product mould are clamped onto the mould halves of the first product mould. Advantageously, the molten raw plastics material to be processed and/or the operating means, such as electrical energy, hydraulic oil or cooling water, are supplied and in some cases removed again by means of changeable pipelines and/or flexible (hose) lines and cables. Constructionally the mould halves of the first product mould are clamped onto the mould clamping plates and have on their inwardly facing sides additional securing means for clamping on the mould halves of a second product mould.
As a result of these measures, the machine standstill times and the production loss times are perceptibly shortened in a simple manner. With program-controlled plastics processing machines, it is possible to continue to operate the machine without readjusting the program, if a spacer is provided with means to adjust it to a fixed position in the closure path of the mould halves between open and closed positions. Thus, the machine parts or mould clamping pates may be moved together in defined manner to a limited, freely pre-selectable spacing.
Also, it is advantageous, especially when such machine change-overs have to be carried out relatively often at short time intervals that changeable pipelines or flexible hose lines or current cables, where appropri
REFERENCES:
patent: 1409591 (1922-03-01), Schavoir
patent: 3354509 (1967-11-01), Ammondson
patent: 3380121 (1968-04-01), Chittenden et al.
patent: 3559235 (1971-02-01), Hagen
patent: 3807928 (1974-04-01), Horberg, Jr. et al.
patent: 3811811 (1974-05-01), Horl
patent: 4202522 (1980-05-01), Hanas et al.
patent: 4501548 (1985-02-01), Jahnel
patent: 4518338 (1985-05-01), Hehl
Patent Abstracts of Japan, vol. 13, No. 296 (M-846)(3644), Jul. 10, 1989, and JP-A-1 87 323 (Kyoraku Co. Ltd.) Mar. 31, 1989.
Mauser-Werke GmbH
Timm Catherine
LandOfFree
Plastics processing machine and process for rapid change-over does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Plastics processing machine and process for rapid change-over, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plastics processing machine and process for rapid change-over will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-694633