PURPOSE OF THE PROJECT / I
For the realization of this gasket it was necessary a research work to identify an injection moldable plastic material that would allow the creation of a gasket to be inserted in an aluminum capsule to close a bottle with a particular type of inside. bitters.
A single cavity pilot mold was built for sample preparation.
The current gasket in use for this type of capsule consists of a central body in wood pulp on which hot glue, paper and pet are assembled for the final composition of the gasket on both sides.
The customer wants a gasket that can replace the one in use today.
The new gasket must have sealing characteristics equal to or greater than the current one, must not absorb colors with the product and must have neutral organoleptic characteristics and therefore not alter the taste of the product, for this reason tests have been carried out in the laboratory.
CONTENTS OF R&D ACTIVITIES
This type of gasket does not exist on the market.
The gasket has such a shape that it does not need to be oriented but can be used on both faces as they are equal to each other, therefore the assembly plant with the aluminum capsule does not require structural mechanical modifications for assembly.
The gasket was made with a particular plastic material that is usually used on compression and non-injection systems, the reduced thickness and shape of the gasket made it possible to create the gasket with an injection system.
TECHNOLOGICAL UNCERTAINTY
This being a completely out of standard gasket, it had to be designed as material shapes and above all to satisfy the customer’s requests.
The obstacles encountered in the realization of the project concerned several aspects, we were not sure of the possibility of being able to print this type of material, we had to think of a shape to guarantee the seal but at the same time a shape that would allow the piece to be the same on both sides. faces, to avoid being oriented in the machine, the guarantee that the gasket placed in contact with the product does not absorb particles of this and consequently become colored, another important factor was to obtain a piece that guaranteed the tightness of the product contained in the inside the bottle and for this reason we have changed the profile several times, always taking into account the thickness of the part in contact with the glass which had to be the same or in any case very similar to that of the gasket currently in use to avoid having the same machinability during the capping phase .
