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US 11,123,905 B2Granted
Polylactic acid moulding process
AssigneeDandelion Research Limited
InventorsKemal Kaya Kaplancali, Dominic Mount Tsun Mak
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Abstract
Novel polylactic acid biopolymer systems and methods of producing products with polylactic acid biopolymers are disclosed. Products produced according to the systems and methods disclosed herein have enhanced deflection temperature and improved mechanical performance when compared to conventional injection moulding processes. Systems and methods for compounding polylactic acid biopolymer and creating an object using a polylactic acid biopolymer by extrusion and injection moulding process are described.
Claims19
A method for manufacturing an object, the method comprising:
- creating a blended resin by combining a crystallization agent and a polylactic acid polymer;
- reducing a moisture content of the blended resin to a threshold;
- creating an object by heating a mould to a mould temperature between 105° C. and 115° C.;
- after achieving the mould temperature between 105° C. and 115° C., injecting the blended resin into the mould to maintain the mould temperature between 105° C. and 115° C.;
- monitoring the mould temperature;
- adjusting the rate of heat transfer to the mould in response to the monitored mould temperature, wherein adjusting the rate of heat transfer into the mould is effectuated by changing the rate of flow of an oil thermally coupled to the mould while creating the object;
- after creating the object, ejecting the object from the mould with multiple discrete contact points for object ejection;
- and
- placing the object in a jig to cool and harden after ejecting the object from the mould.
6 more elements
Dependencies are inferred from the claim text.