Dual-plate-type die closing unit used for moulding machine

Abstract

The invention relates to a dual-plate-type die closing unit used for a moulding machine, which is used for applying a die closing force to at least two moulding mold parts and includes: a first and asecond mold clamping boards which can move relative to each other; a pull rod which penestrates through the first and a second mold clamping boards and moves relative to the same; a locking apparatus,by which the pull rod can be locked with the first mold clamping board and / or a piston-cylinder unit; the piston-cylinder unit which is configured to apply at least one part of a die closing force asa part of a die closing force apparatus and / or enable the pull rod to move relative to the first and / or second mold clamping boards as a part of a mold height adjustment apparatus, wherein the die closing force apparatus includes an active material configured to apply a part of the die closing force under effect of electromagnetic field and / or temperature varying, and / or, the mold height adjustment apparatus includes the active material, which is configured to determine extension size of defining the mold height of the active material under the effect of the electromagnetic field and / or temperature varying.

Description

technical field [0001] The invention relates to a two-platen clamping unit for a forming machine, which has the features stated in the preamble of claim 1 . Background technique [0002] A molding machine is understood here to mean an injection molding machine, a die-casting machine, a pressing machine and the like. [0003] Prior art injection molding machines of this type have a first mold clamping plate (for example movable relative to the machine frame) on which a part of the forming mold (usually a mold half) can be mounted . Likewise, a second mold clamping plate (fixed relative to the frame) is provided, on which another part of the forming mold can be mounted. The two mold clamping plates are penetrated by at least one tie rod, wherein in practice the embodiment with four tie rods penetrating the mold clamping plates is the most common. [0004] The at least one tie rod can be locked relative to the first mold clamping plate by means of a locking device. That end...

AI Technical Summary

Problems solved by technology

The following disadvantage arises here: Although magnetostrictive materials can achieve high force densities, the change in length per unit length is strongly limited

Because the split nut used for locking cannot be locked in any position of the tie rods (in practice, the groove of the outer profile on the at least one tie rod can be several centimeters wide), so a very long Main body made of magnetostrictive material, thereby increasing the overall structural length of the clamping unit

This is already a disadvantage in itself and is magnified by having to use large quantities of relatively expensive magnetostrictive material

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