RUBBER MOLDING DIE, AND MOLDING METHOD AND RUBBER MOLDING USING THE SAME

• Main Authors: NISHIMURA HIROSHI, AZUMA YOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To achieve longevity of a rubber molding die 1 and to eliminate product function deterioration factors.SOLUTION: A rubber molding die includes: an upper die 2 having an upper side molding groove 4a for molding at least one rubber molding 20 and an upper side clearance groove 8a to which an excess rubber from the upper side molding groove 4a flows in; and a lower die 3 having a lower side molding groove 4b for molding at least one rubber molding 20 at a position opposed to the upper side molding groove 4a and a lower side clearance groove 8b to which an excess rubber from the lower side molding groove 4b flows in. A burr groove 11 for intentionally forming a burr part 21 is formed over the whole periphery at at least one of a circumference 5 of the upper side molding groove 4a and the lower side molding groove 4b between the upper side molding groove 4a and the upper side clearance groove 8a and between the lower side molding groove 4b and the lower side clearance groove 8b.SELECTED DRAWING: Figure 1A 【課題】ゴム成形用金型１の長寿命化と製品機能低下要因の排除。【解決手段】少なくとも１つのゴム成形品２０を成形する上側成形溝４ａ及び上側成形溝４ａからの余りゴムが流れ込む上側逃げ溝８ａを有する上型２と、上側成形溝４ａに対向する位置に少なくとも１つのゴム成形品２０を成型する下側成形溝４ｂ及び下側成形溝４ｂからの余りゴムが流れ込む下側逃げ溝８ｂを有する下型３とを備えており、上側成形溝４ａと上側逃げ溝８ａとの間及び下側成形溝４ｂと下側逃げ溝８ｂとの間における上側成形溝４ａ及び下側成形溝４ｂの少なくとも一方の周縁５には、バリ部２１を意図的に形成するためのバリ用溝１１が全周に亘って形成されている。【選択図】図１Ａ