Abstract:
The invention concerns a device for producing plates made of metal, plastic or metallo-plastic composite material, whether they are non-exclusively thermofusible, thermoplastic or thermosetting designed more particularly to be machined with a machining tool in a fast prototyping process. The invention is characterised in that it consists of a plate mould integrated in the prototyping machine, said mould being adapted to receive a material matching the shape of the mould after being subjected to a heating/cooing cycle with heating/cooling means integrated in the mould body. It essentially comprises: a vat (2); a base plate (3); a heating circuit (4); a fluid circulation circuit (5).
Abstract:
Process and apparatus for molding the front and rear surfaces of a contact lens in one step is disclosed. Two mold halves (110, 112) matable to form a contact-lens-shapes cavity and a cavity (119) for excess lens forming material surrounding the cavity are provided. The improvement comprises providing the cavity with at least two openings (121, 132, 133) and producing differential gas pressure across the openings to remove excess lens forming material.
Abstract:
Gegenstand der Erfindung ist ein Schäumstanzwerkzeug zur Herstellung von Schaumteilen (4) aus Integralschaum sowie ein entsprechendes Verfahren zur Herstellung der Schaumteile (4).
Abstract:
A method and system for forming a mold cavity is provided. The method and system contemplate a process of discharging a hardening element or material into a first material and subsequently machining the infused product to a desired shape such as a tear bead shape for a mold cavity for forming rubber and metal components. The methods and systems provided herein contemplate selective hardening of specific portions or features of a mold cavity without the need to provide conventional cooling or quenching operations.
Abstract:
A modified compression moulding arrangement 10 where the compression moulding tool 11 has been modified to allow for the use of pre-impregnated pre-form sheets in order to produce class A automotive structural parts in high volume. The pre-impregnated preform has continuous un-chopped fibers that extend across an entire length of the pre-impregnated pre-form. The pre-impregnated preform is then placed in an open compression moulding tool that has a bottom half 16 and a top half 12 that are movable between an open position and a closed position. When the mould tool is in the closed position, the top half and bottom half create a forming cavity 20 that is defined by a forming surface 14 of the top half and a forming surface 18 of the bottom half. The forming surface of the bottom half has a boundary defined by a run-off edge 24 and an upshear 26,28 that is necessary for forming a class A structural automotive component using pre-impregnated pre-form material.
Abstract:
A process for the production of plastic lenses which comprises mixing polymerizable components and injecting the mixture immediately after the mixing into a mold whose cavity is filled with carbon dioxide, and polymerizing the mixture; a process for the production of plastic lenses which comprises injecting a raw material fluid of plastic lenses flowing from the opening of an injection jig, part of which fluid enters the passageway of an injection pipe and the other part of which fluid runs off, into a mold and curing the fluid; a gasket for molding plastic lenses in which the injection pipe has an opening of the injection passageway at the end and a tilt around the opening; a process for the production of plastic lenses which comprises injecting a raw material fluid of plastic lenses into a mold held by a holding fixture having an injection pipe holding part and a passageway-sealing part and curing the fluid; and a holding fixture for holding the molds for molding plastic lenses.
Abstract:
A large surface shaped structure having a smooth surface is formed by compression molding a charge (26) of reinforced molding material containing a thermoplastic material by placing a heated mold charge (26) in a mold (12, 14) which has its peripheral surfaces spaced apart to provide a shear gap (34). The width of the shear gap (34) is adjusted to accept a quantity of molding material sufficient to dissipate residual energy in the flow front of the charge to prevent rebound of the flow front as the structure solidifies.