Take-out mechanism for a glassware forming machine

Details Take-out mechanism for a glassware forming machine Take-out mechanism for a glassware forming machine

1982-09-30

1985-06-25

Bashore, S. Leon

Glass manufacturing

With means above mold to take-out or transfer product

414733, 414736, 65239, C03B 3504

Patent

active

045251959

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention is concerned with a take-out mechanism for a glassware forming machine comprising a tong carrier movable in an arcuate path between a first position at which tongs supported by the carrier can grip an article of glassware and a second position at which the tongs can release the article on to a support, an arm on which the tong carrier is mounted, moving means operable to move the arm arcuately to move the tong carrier along the arcuate path, and cushioning means operable to oppose the action of the moving means as the tong carrier approaches the second position to thereby reduce the impact between an article of glassware gripped by the tongs carried by the tong carrier and the support.


BACKGROUND ART

In glassware forming machines, articles of glassware are blow moulded at a blow moulding station of the machine and then require to be removed from the moulds and positioned on a support, known as a dead plate, before being transferred to a conveyor for removal from the machine. In order to remove the articles of glassware from the moulds and position them on the dead plate, a glassware forming machine has a take-out mechanism which supports tongs which grip an article of glassware in the mould and release it on to the dead plate. In the interests of high productivity, it is necessary that the take-out mechanism operates as rapidly as possible. However, it is also necessary that the tongs do not damage the article of glassware particularly by too high an impact between the articles and the dead plate. Accordingly, take-out mechanisms have cushioning means for cushioning their movement as the articles of glassware approach the dead plate. Existing cushioning means, however, requires time-consuming adjustment to enable it to operate over a long period of time. For example, one known hydraulic cushioning means becomes inefficient due to leakage and decay in the properties of the hydraulic oil.
It is an object of the present invention to provide a take-out mechanism for a glassware forming machine which comprises cushioning means which functions efficiently without requiring adjustment for long periods of time.


DISCLOSURE OF INVENTION

According to the invention the cushioning means of the take-out mechanism comprises a pneumatic piston and cylinder assembly whose piston is arranged to be moved in the cylinder by the action of the moving means as the tong carrier approaches its second position, the movement of the piston in the cylinder being opposed by air under pressure in the cylinder.
Once the take-out mechanism has released the articles of glassware on to the support, it is desirable that the tong carrier move away from the articles of glassware as rapidly as possible, in order to allow the articles to be removed from the support. In order to achieve rapid movement of the tong carrier away from the support, preferably in a take-out mechanism according to the invention the piston and cylinder assembly of the cushioning means is operative to move the tong carrier away from its second position when the article has been released on to the support.
In order to simplify the operation of the cushioning means of a take-out mechanism according to the invention, a substantially constant air pressure is maintained in the cylinder of the piston and cylinder assembly of the cushioning means, this constant air pressure serving to oppose the movement of the piston in the cylinder as aforesaid.


BRIEF DESCRIPTION OF THE DRAWING

The drawing is a side elevational view, partly in section, of a take-out mechanism in accordance with the invention.


BEST MODE OF CARRYING OUT THE INVENTION

The take-out mechanism shown in the drawing comprises a tong carrier in the form of a bar 2 on which three pairs of tongs 4 are supported. Each pair of tongs 4 can grip an article of glassware so that the tong carrier may simultaneously carry three articles of glassware. The tong carrier 2 is fixedly mounted on a cylinder 6 of a piston and cylinder assembly which operates the tongs 4. The cylinder 6 is fix

REFERENCES:
patent: 899795 (1908-09-01), Osmer
patent: 2783591 (1957-03-01), Johnson
patent: 2826176 (1958-03-01), Chellis et al.
patent: 3150562 (1964-09-01), Allgeyer
patent: 3220566 (1965-11-01), Rowe
patent: 4043254 (1977-08-01), Jaeger
patent: 4098597 (1978-07-01), Nebelung
patent: 4298373 (1981-11-01), Mumford et al.
patent: 4351663 (1982-09-01), Wood

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