초록 ▼

A flash removing method whereby flash is cut off by a reamer which is freely movable while being in contact with polymeric molded products within a predetermined range of pressing force. The reamer is provided with blades having normal clearance angles of substantially zero degree and the flanks of

A flash removing method whereby flash is cut off by a reamer which is freely movable while being in contact with polymeric molded products within a predetermined range of pressing force. The reamer is provided with blades having normal clearance angles of substantially zero degree and the flanks of the blades follow the flash-forming region. The reamer is controlled in radial position according to the shape of the polymeric molded product, so that the reamer always receives a constant radial load from the product to leave even traces after the flash removal. A solidified gate is cut off before the flash removal. A flash removing apparatus for performing the method.

대표청구항 ▼

An apparatus for removing flash from a flash-forming region of a polymeric molded product comprising: (a) flash removing means, including a cutting reamer for removing the flash by being brought into contact with a flash-forming region of a polymeric molded product and a motor for rotating the cutti

An apparatus for removing flash from a flash-forming region of a polymeric molded product comprising: (a) flash removing means, including a cutting reamer for removing the flash by being brought into contact with a flash-forming region of a polymeric molded product and a motor for rotating the cutting reamer; (b) moving means for allowing the reamer to be in contact with the polymeric molded product within a predetermined range of pressing force toward the polymeric molded product; (c) a supporting member for supporting the motor so that the motor is fixed against axial movement but movable in at least one direction perpendicular to its axial direction; and (d) return members operable when the motor is moved, for allowing a position of the motor in relation to the supporting member after being displaced to return to a previous position before the displacement of the motor, the return members being at least three in number and being arranged around the motor; said supporting member (33) including: a base plate (34) disposed around the motor (32) with a certain clearance therebetween; at least three bearings (36) fixed on the base plate (34) to allow the motor (32) to be movable not in its axial direction but in directions perpendicular to its axial direction; and a supporting plate (42) arranged on the bearings (36). A method for removing flash from armoring material of a steering wheel, comprising the steps of: (a) securing a steering wheel with polyurethane foam armoring material flash, on a base; (b) rotating a cutting reamer using a motor, said cutting reamer having a plurality of blades each of which has a normal clearance angle which is substantially 0°, each two angularly adjacent ones of said blades having located therebetween a groove of rectangular transverse cross-sectional shape; (c) moving a supporting member along a predetermined moving locus to move a flank of each of said blades substantially in contact with said flash-forming region, said reamer being attached to said supporting member with a clearance provided therebetween so as to be movable relative to a flash-forming region of said armoring material of said steering wheel only in a direction perpendicular to an axial direction of said motor; (d) providing returning members between said reamer and said supporting member for allowing a position of said reamer in relation to said supporting member after being displaced to return substantially to a previous position; said moving step (c) including a floating step for moving said reamer in to said relation supporting member due to undulation of said flash-forming region of said armoring material of said steering wheel and returning said reamer to said previous position, said moving locus being predetermined so that said cutting reamer is in contact with said flash-forming region of said armoring material of said steering wheel with a slight pressing force toward said armoring material of said steering wheel.