Patent US442766A successfully refreshed from Google Patents.
EP0141531A2
Expired / Lapsed
EP
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Method of, and apparatus for, injecting liquid resin
Assignee: Individual
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Filing: 1984-10-01
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Granted: —
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Expires: 2004-10-01
Abstract
Abstract To enable liquid resin to be fed into a mould 25 from a container 11 the interior of the charged container is pressurised and a nozzle 16 on an outlet 17 of the container is positioned in a mould sprue 26. A valve 18 in the outlet 17 is opened to enable mixture to be driven into the mould 25 from the container 11. The valve 18 is closed when the mixture is sensed to have reached a remote part of the mould 25 or when mixture is no longer present in the outlet 17. Closure of the valve is accomplished by a regulator 20 acting in response to a signal from a sensor 22 disposed in the mould remotely from the nozzle 16 or from a sensor 29 in the outlet 17.
Inventors
- 👤 Alan Harper
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:59
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/76; B29C45/7613; B29C2045/468
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
1 A method of injecting liquid resin into a mould by way of a nozzle (16) positioned to feed the mould (25) by way of a mould sprue (26) characterised by the steps of: (i) charging a pressurisible container (11) having an outlet nozzle (16) closed by a valve (18) with a given amount of a mixture of resin and such additives (such as catalyst) as may be required ; (ii) pressurising the interior of the charged container (11); (iii) disposing the charged container (11) so that the nozzle (16) is positioned to feed a mould cavity (28) by way of a mould sprue (26); (iv) causing the valve (18) to open to enable mixture to pass into the sprue (26) by way of the nozzle (16) under the action of a pressure differential existing between container interior and nozzle outlet; and (v) closing the valve (18) when the mixture is observed or otherwise detected as filling the mould (25).
Claim 2
Dependent Claim
160 words
1 A method of injecting liquid resin into a mould by way of a nozzle (16) positioned to feed the mould (25) by way of a mould sprue (26) characterised by the steps of: (i) charging a pressurisible container (11) having an outlet nozzle (16) closed by a valve (18) with a given amount of a mixture of resin and such additives (such as catalyst) as may be required ; (ii) pressurising the interior of the charged container (11); (iii) disposing the charged container (11) so that the nozzle (16) is positioned to feed a mould cavity (28) by way of a mould sprue (26); (iv) causing the valve (18) to open to enable mixture to pass into the sprue (26) by way of the nozzle (16) under the action of a pressure differential existing between container interior and nozzle outlet; and (v) closing the valve (18) when the mixture is observed or otherwise detected as filling the mould (25).
Claim 3
Dependent Claim
88 words
2 A method as claimed in Claim 1 characterised in that the step of closing the valve (18) is achieved by: (i) positioning a mixture sensor (22) at a point in the mould (25) remote from the sprue (26); and (ii) feeding a signal output from the sensor (22) to a regulator (20) adapted to operate the valve (18) so as to cause closure of the valve when the sensor (22) detects the presence of mixture at the point in the mould (25) remote from the sprue (26).
Claim 4
Dependent Claim
95 words
3 A method as claimed in Claim 1 charaterised in that the step of closing the valve (18) is achieved by: (i) positioning a mixture sensor (29) at a point in the outlet (17) between the valve (18) and the container (11); and (ii)) feeding a signal output from the sensor (29) to a regulator (20) adapted to operate the valve (18) so as to cause closure of the valve (18) when the sensor (29) detects the absence of mixture at the point in the nozzle (16) between the valve (18) and the container (11).
Claim 5
Dependent Claim
68 words
4 Apparatus for injecting liquid resin into a mould (25) by way of a nozzle (16) characterised by a pressurisble container (11), with pressurising inlet (12) for pressurising its interior in a controlled manner, having an outlet (17) equipped with the nozzle. (16), the passage of mixture through the nozzle (16) being regulatable by way of a valve (18) positioned between the container (11) and the nozzle (16).
Claim 6
Dependent Claim
68 words
4 Apparatus for injecting liquid resin into a mould (25) by way of a nozzle (16) characterised by a pressurisble container (11), with pressurising inlet (12) for pressurising its interior in a controlled manner, having an outlet (17) equipped with the nozzle. (16), the passage of mixture through the nozzle (16) being regulatable by way of a valve (18) positioned between the container (11) and the nozzle (16).
Claim 7
Dependent Claim
73 words
5 Apparatus as claimed in Claim 4 characterised by the provision of: (i) a sensor (22, 29) for mixture dispensed from the container (11); (ii) a regulator (20) for operating the valve (18) between open and closed positions; and (iii) a signal transmitter linking the sensor (22, 29) to the regulator (20) whereby the regulator (20) is enabled to operate the valve (18) in dependence on the output of the sensor (22, 29).
Claim 8
Dependent Claim
35 words
6 Apparatus as claimed in Claim 4 or Claim 5 characterised in that the container (11), the regulator (20), the sensor (29) and the signal transmitter are incorporated into a single unit for operational use.
References Cited (Backward Citations)
No citation records indexed.
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