Product molding method and apparatus and product

Abstract

The present invention relates to product molding method and apparatus and a product. A product molding apparatus comprises: a lower mold which has one or more molding grooves formed thereon and on which a material is mounted; an upper mold which is disposed above the lower mold and is for applying pressure to the material; and a punch part which is provided on the upper mold, is inserted into the molding grooves on the lower mold such that the material is molded, and discharges a filling material that has been pressed. The present invention enables quick and easy molding of a product by means of both hot press forming and hydroforming, thereby reducing manufacturing procedures and time and thus saving cost.

1 . A method of molding a product, comprising:
 a heating step of heating a material;   a mounting step of mounting the material on a lower mold;   a first molding step of primarily molding the material by lowering an upper mold to the lower mold;   a second molding step of secondarily molding the material by applying fluid pressure from the upper mold or the lower mold in a state in which the upper mold has been lowered; and   a cooling step of cooling the material,   wherein the second molding step comprises a liquefying step of heating a filler to be liquefied and a fluid pressure discharging step of discharging the fluid pressure by pressurizing the filler having been liquefied.   
     
     
         2 . The method of  claim 1 , wherein, in the second molding step, a second molding portion is formed in a first molding portion of the material primarily molded using the first molding step. 
     
     
         3 . The method of  claim 1 , wherein a portion of the material to be secondarily molded in the second molding step is maintained at a temperature of the first molding step. 
     
     
         4 . The method of  claim 3 , wherein the cooling step is performed simultaneously with the second molding step or before the second molding step is completed. 
     
     
         5 . The method of  claim 1 , wherein, in the cooling step, the material is cooled to have a structure including martensite. 
     
     
         6 . (canceled) 
     
     
         7 . The method of  claim 1 , further comprising a separation step of separating the upper mold from the lower mold after the filler is cured in the cooling step. 
     
     
         8 . The method of  claim 1 , further comprising an extraction step of extracting the material formed by dividing at least a portion of the lower mold or the upper mold. 
     
     
         9 . A product molding device, comprising:
 a lower mold in which at least one molding recess is formed and on which a material is mounted;   an upper mold disposed above the lower mold to pressurize the material; and   a punch portion disposed in the upper mold and inserted into the at least one molding recess of the lower mold to mold the material and discharging a filler having been pressurized,   wherein the lower mold comprises a plurality of division portions which are separable, and the at least one molding recess is divided.   
     
     
         10 . The product molding device of  claim 9 , comprising a filler supply portion supplying the filler to the punch portion and pressurizing. 
     
     
         11 . The product molding device of  claim 10 , further comprising an operation portion vertically disposed on a frame and including an operating rod, and a moving plate connected to the operating rod and ascending and descending by the operating rod,
 wherein the upper mold is disposed below the moving plate, and the filler supply portion is disposed on the moving plate.   
     
     
         12 . The product molding device of  claim 10 , wherein the filler supply portion comprises a tank supplying the filler, a transfer portion connected below the tank and disposed on the moving plate to transfer the filler, a heating portion disposed to surround at least a portion of the transfer portion, and a pressurizing portion connected between a point downstream of the transfer portion and the punch portion and pressurizing the filler to be transferred to the punch portion. 
     
     
         13 . The product molding device of  claim 12 , wherein the transfer portion comprises a case in communication with the tank, to which the filler is supplied, a screw disposed in the case and rotated to transfer the filler in the case, and a first motor connected to the screw to rotate the screw. 
     
     
         14 . The product molding device of  claim 12 , wherein the pressurizing portion comprises a supply pipe extended from a downstream side of the transfer portion, a pressurizing main body, one side of which is in communication with the supply pipe and the other side of which is in communication with the punch portion, a piston moved back and forth in the pressurizing main body to pressurize the filler having flowed into the pressurizing main body toward the punch portion, and a driving portion providing a driving force to the piston. 
     
     
         15 . The product molding device of  claim 14 , wherein, in a state in which the piston pushes the filler toward the punch portion, the piston closes a connection hole of the pressurizing main body in communication with the supply pipe. 
     
     
         16 . The product molding device of  claim 12 , wherein the punch portion comprises a punch die disposed in the upper mold and inserted into the at least one molding recess of the lower mold to mold the material, a connection pipe in communication with the pressurizing portion and disposed to penetrate through the moving plate and the upper mold, a filler passage in communication with the connection pipe and formed in the punch die, and a discharge hole connected to the filler passage to extrude the filler, having been supplied, toward the material. 
     
     
         17 . The product molding device of  claim 16 , wherein at least a portion of the connection pipe is surrounded by a heating member. 
     
     
         18 . The product molding device of  claim 16 , comprising a guide ring surrounding an outer circumferential surface of the punch die and moved in a moving direction of the punch die. 
     
     
         19 . The product molding device of  claim 18 , wherein an insertion groove is formed on a periphery of the connection pipe in the upper mold to allow the guide ring to be inserted into the upper mold, and a spring is interposed between a wall portion opposing an opening and the guide ring in the insertion groove. 
     
     
         20 . (canceled) 
     
     
         21 . The product molding device of  claim 9 , wherein a moving portion allowing each of the plurality of division portions to be moved to be separated from each other is provided. 
     
     
         22 . The product molding device of  claim 21 , wherein the moving portion comprises a moving block fixed to the division portion, a screw bar screw coupled to the moving block, and a second motor connected to an end of the screw bar to rotate the screw bar,
 wherein the screw bar is provided as a double screw member having screw threads, opposing sides of which have different directions based on a central portion.   
     
     
         23 . The product molding device of  claim 9 , wherein a heating body is embedded adjacently to the molding recess in each of the plurality of division portions. 
     
     
         24 . The product molding device of  claim 9 , wherein an additional molding recess is formed on a side wall of the at least one molding recess. 
     
     
         25 . A hot press forming product, the product being manufactured using steel, comprising:
 a structure having martensite in at least a portion of the hot press forming product,   wherein a three-dimensional second molding portion smaller than a first molding portion is formed in a three-dimensional first molding portion,   wherein a cured portion of filler is at least included in the second molding portion.   
     
     
         26 . The hot press forming product of  claim 25 , wherein the first molding portion is formed by being molded in one direction, the second molding portion is formed by being molded in a direction different from the one direction in the first molding portion. 
     
     
         27 . The hot press forming product of  claim 25 , wherein the first molding portion and the second molding portion comprise a structure the same as a structure including the martensite. 
     
     
         28 . The hot press forming product of  claim 25 , wherein the first molding portion and the second molding portion comprise a structure including ferrite or bainite. 
     
     
         29 . (canceled) 
     
     
         30 . The hot press forming product of  claim 25 , wherein the filler is formed using a resin or a metal, a melting point of which is lower than a melting point of the steel.