T/JYJDMJXH 01-2019 Active Group standards

T/JYJDMJXH 01-2019 One-time injection molding mold for imitation wooden hollow footrest armrests

Publish Date: 2019-07-01 Implement Date: 2019-07-10 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JYJDMJXH 01-2019

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Mold

ICS Name: The manufacturing molding process

Publish Date: 2019-07-01

Implement Date: 2019-07-10

Scope

Main Technical Content: 1. Requirements 1.1 Manufacturing The mold shall be manufactured according to the drawings and technical documents approved through the prescribed procedures. 1.2 Part-mold fit and movement The parts should fit the mold smoothly and operate flexibly and steadily, without jams or interference. The mold structure should be reasonable, durable, and low-wear. The moving parts of the mold should meet the precision requirements of GB/T 1800.1-2009, Grade Ⅱ11 or higher. The mold should not deform after 500,000 continuous production cycles, and the mold temperature should not exceed 60°C after 100,000 continuous production cycles. 1.3 Main materials For the mold cavity surface, the key indicators are: surface hardness ≥ 500 HV, and steel properties including good polishing, electro-erosion, weldability, and machinability. 1.4 Processing requirements 1.4.1 Surface roughness The surface roughness of the mold cavity should be Ra ≤ 1.6 μm, and the surface roughness of the upper and lower flat surfaces of the mold should be Ra ≤ 3.2 μm. The surface roughness of all sliding fit surfaces should be Ra ≤ 1.6 μm. 1.4.2 Welding For parts with welded structures, the form and size of the welding seams should comply with the provisions of GB/T 985.1. The welding seams should be smooth and uniform with a transition that is free of pores, slag, cracks, burn-throughs, or other welding defects. Welding slag and spatter should be cleaned thoroughly. 1.4.3 Hydraulic testing The water flow during hydraulic testing should be smooth and unobstructed. 1.5 Positioning device The positioning device should operate flexibly and reliably with accurate positioning. 1.6 Push rod hardness The surface hardness of the push rod should be HRC 35–45. 1.7 Limit deviations The main dimensional tolerances of the mold should comply with Table 1 and GB/T 1800.1-2009. The precision of molded parts can reach Grade Ⅱ12 or higher. 1.8 Anti-rust treatment