Press system

Abstract

Disclosed is a press system having advantages of preventing a molded product panel from bursting or being torn due to a difference in molding depth caused by a protrusion shape to improve the moldability and marketability of the product panel when press molding is performed on a material panel. An illustrative press system comprises: a lower die punch provided on a bolster and having a lower surface shape of a product panel; a blank holder provided on the outside of the lower die punch and mounted on the bolster through cushion pins; an upper die having an upper surface shape of the product panel, mounted on the slider, and pressing a material panel together with the lower die punch to mold the product panel; and a sub blank holder unit provided inside the lower die punch by performing the molding while holding a portion of the material panel to be molded into a protrusion shape together with the upper die such that a difference in molding depth is compensated when molding is performed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2010-0123462 filed in the Korean Intellectual Property Office on Dec. 6, 2010, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002](a) Field of the Invention[0003]The present invention relates to a press system, and more particularly, to a press system preventing a molded product panel from bursting or being torn due to a difference in molding depth caused by a protrusion shape when a material panel is molded.[0004](b) Description of the Related Art[0005]In general, a vehicle maker produces a vehicle by assembling about 20000 to 30000 components through several assembly processes.[0006]Particularly, product panels are produced through various kinds of press systems in the first stage of a vehicle manufacturing process, and is transferred to a vehicle body factory where each portion of the product panels is ...

AI Technical Summary

Benefits of technology

[0015]The present invention has been made in an effort to provide a press system having advantages of preventing a molded product panel from bursting or being torn due to a difference in molding depth caused by a protrusion shape to improve the moldability and marketability of the product panel when press molding is performed on a material panel.

[0020]According to the exemplary embodiments of the present invention, it is possible to prevent a product panel from bursting or being torn due to a difference in molding depth caused by a protrusion shape when press molding is performed on a material panel.

Problems solved by technology

However, the general press system has a problem in which the product panel bursts or is torn at a portion molded in a protrusion shape due to a difference in molding depth in a case of molding a material panel integrally with a protrusion shape such as a spoiler applied to a tail gate of a hatchback style vehicle or an RV vehicle.

Therefore, the general press system involves problems in which when a material panel is molded, the depth of the protrusion shape is restricted to reduce moldability, a separate additional structure should be mounted to implement the protrusion shape to increase the cost, and the marketability of the molded product panel is reduced.

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