40results about "Mould loosening devices" patented technology

A tool 100 having a forming surface 102 being formed from a contiguous material 101 and including, within the contiguous material 101 into which the forming surface 102 is operatively resident, a cylinder 150, 170 or other selectively movable member which may be selectively used to remove an object from the tool 100.

The present invention relates to the technical field of mold ejectors, in particular to a special ejector for motor shell lost foam, which includes a force-bearing part, and several ejectors are evenly distributed around the force-bearing part; The flap on the stressed part; the flap is hingedly connected with the positioning part arranged on the stressed part. The invention has simple structure and strong practicability.

A tool 100 having a forming surface 102 being formed from a contiguous material 101 and including, within the contiguous material 101 into which the forming surface 102 is operatively resident, a cylinder 150, 170 or other selectively movable member which may be selectively used to remove an object from the tool 100.

The invention provides a mold ejector with a mold ejector, comprising an upper flask and a lower flask, more than one ejector is provided outside the lower flask, and an ejector is provided on the ejector . The mold ejector includes a fixed seat for fixing the outside of the sand box, and a lifting rod is provided on the fixed seat, and a cross arm is rotatably connected to the lifting rod. The bottom end of the ejector rod and the ejector plate are detachably provided with more than one tapered structure. The ejector plate is a cube structure. The ejector plate is a cuboid structure. The ejection plate is a disc structure. The two ends of the lower sand box are provided with handles. In the present invention, a mold lifter is provided on the outside of the sand box, and the mold is taken out from the vertical direction by using the mold lifter to avoid damage to the sand mold cavity.

The invention relates to the field of casting and provides a sand core automatic demoulding mechanism and a demoulding method for a screw compressor rotor, wherein the sand core automatic demoulding mechanism has an ingenious design, sufficiently utilizes the characteristic of a screw thread on the surface of the rotor to carry out demoulding and has a high production efficiency and a high quality. The invention solves the technical problems that in the prior art, the production efficiency is low, the labor intensity of workers is high, a sand core has a poor quality, the quality of the screw compressor rotor cannot be ensured and the like. The sand core automatic demoulding mechanism comprises a bracket, a left die and a right die, wherein the left die and the right die can relatively slide on the bracket along the horizontal direction; after the left and right dies are abutted, a synthetic sand core cavity is surrounded; a screw compressor rotor core rod is arranged at the middle part of the sand core cavity; and the screw compressor rotor core rod is screwed on the bracket and can be driven by a driving mechanism to rotationally enter and exit the synthetic sand core cavity. In the demoulding process, firstly, resin sand is placed into the sand core cavity to be tamped and the upper surface of the resin sand is scraped by a sand scraper; the resin sand is cured by a heating rod; and then the driving mechanism is started to screw out the screw compressor rotor core rod; and finally, the left and right dies are driven by the cylinder to slide outward to be demoulded.