DE20303305U1 - Three-part metal casting mold clip frame with chaplet has three-part clip-frame with S-shaped hook, core chaplet cross-piece, and U-shaped hook - Google Patents

Abstract

The metal casting mold cavity has a three-part clip-frame with an S-shaped hook (2), a core chaplet (1) cross-piece, and a U-shaped hook (3). The chaplet cross-pieces is fabricated esp. in RSt 36-2 metal with two swaged profiled ends. The hooks are profiled DC01 sheet metal which are larger at the top than at the bottom. The unit (1-3) is dimensioned to fit a sand core, and are capable of absorbing compression forces, tensile forces and lateral forces.

Description

"Description"

Core clamp with holding support bracket

The invention relates to a combined core support, consisting of a conical water jacket core clamp with up to two bent holding support brackets.

When casting engine blocks made of gray cast iron, spheroidal graphite cast iron or vermicular graphite cast iron (GG, GGG, GGV), the future cooling water chamber and an oil channel are filled with a sand core during the casting process.

These water jacket and oil channel cores must be held in a stable position in the casting mold. This is achieved by setting core supports that keep the cores and mold at a distance according to the required casting wall thickness.

Competition, especially in direct comparison with aluminum casting, is forcing iron foundries to increasingly use lightweight construction and thus to use ever thinner casting walls, which inevitably leads to more complicated cores.

In the application described here, it is necessary to support the water jacket core and the oil channel against both compressive and tensile stresses.

To date, conical core clamps with a compressed web and two welded profile sheets, as well as engine blocks with and without a weld-in plate, have been placed in the inner contour of the water jacket and oil channel core to counteract the compressive stresses.

To counteract the tensile stresses, additional retaining brackets or engine blocks are placed on the outer surface of the water jacket and oil channel core.

What is new and inventive about the core clasp with bent holding and support bracket is that the core clasp, consisting of parts 1/2/3, forms a unit. Its contours allow it to absorb multiple compressive and tensile forces. The shape of the core clasp with holding and support bracket, which is adapted to the core structure, is also able to absorb lateral forces. Time-saving handling and a secure fit of this combined core support are the main advantages of this invention.

Claims (1)

Core clamp with bent holding support bracket, characterized in that two V- and U-shaped bent profile sheets ( 2/3 ) made of the material DC01 are conically welded onto a core support web ( 1 ) made of the material RSt 36-2 with two externally upset profile heads , one with a bent U-bracket or with two U-brackets bent in opposite directions to the upset heads of the said web, so that the support dimension is larger at the top than at the bottom.
The unit, consisting of parts 1 / 2 / 3, is adapted to the sand core in such a way that it can absorb multiple compressive and tensile forces as well as lateral forces.