This part specifies the dimensions and tolerances of reset rods for die casting moulds. This part is applicable to reset rods for die casting moulds. This part also gives guidance and hardness requirements and specifies the marking of reset rods. GB/T 4678.12-2003 Die casting mould parts Part 12: Reset rods GB/T4678.12-2003 Standard download decompression password: www.bzxz.net

GB/T4678 "Die casting die parts" is divided into 19 parts: Part 1: Template; Part 2: Round insert; Part 3: Rectangular insert; Part 4: Shouldered guide pin; Part 5: Headed guide pin; Part 6: Headed guide bushing; Part 7: Straight guide bushing; Part 8: Push plate; Part 9: Push plate guide pin; t||- Part 10: Push plate guide sleeve;
Part 11: Push rod;bZxz.net
Part 12: Reset rod
- Part 13: Push plate washer;
- Part 14: Stop pin;
Part 15: Spacer;
Part 16: Flat push rod;
Part 17: Push tube;
- Part 18: Support column;
Part 19: Positioning element.
This part is Part 12 of GB/T 4678. Foreword
This part replaces GB/T 4678.12-1984 "Reset rod for die casting parts". Compared with GB/T4678.12-1984, the main changes of this part are as follows: GB/T4678.12-2003
has made major changes in the arrangement of the standard, adding "foreword", "scope" and "normative reference documents", and specifying the content of the mark.
- The size specification series has been modified, and the large size specification series has been added. The material has been changed to recommended selection.
Surface roughness replaces the smoothness in the original standard. This part was proposed by the China Electrical Equipment Industry Association. This part is under the jurisdiction of the National Technical Committee for Standardization of Die (SAC/TC33). The drafting units of this part are: Shanghai Pierburg Nonferrous Parts Co., Ltd., Guangzhou Cavity Die Factory, Guilin Electric Science Research Institute, Dongfeng Technology Automotive Braking System Company, Chengdu Xingguang Die Casting Industry Co., Ltd. The main drafters of this part are: Zhang Liangen, Cai Zijin, Weng Shizhen, Feng Bochun, Liao Hongyi, Yang Zhaoling, Huang Zhilu, Li Hongying. This part was first issued in September 1984 and revised for the first time in 2003. 51
GB/T 4678.12—2003
1 Scope
Die casting die parts Part 12: Reset rod
This part specifies the dimensions and tolerances of reset rods for die casting dies. This part applies to reset rods used in die casting dies. This part also gives material guidelines and hardness requirements, and specifies the marking of reset rods. 2. Normative references
The clauses in the following documents become clauses of this part through reference in this part of GB/T 4678. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to agreements based on this part are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest versions are applicable to this part.
GB/T4679--2003 Technical conditions for die casting parts 3 Dimensions and specifications
See Figure 1 and Table 1.
Surface roughness in micrometers
Surface roughness without indication Ru=6.3μm.
No center hole is allowed on the end face.
Figure 1 Reset rod
4 Material and hardness
Material is selected by the manufacturer, and T8A and T10A are recommended. Hardness 50HRC~55HRC.
5 Technical requirements
Should meet the requirements of GB/T4679-2003. 52
Reset rods according to this standard shall have the following markings:a)
Reset rod;
Reset rod diameter D, in millimeters;
Reset rod length L, in millimeters;
Thickness of the head of the reset rod h, in millimeters;d)
Code of this standard, i.e. GB/T4678.12--2003. Example:
Reset rod dimensions
D=10 mm, L=80 mm, h=5 mm are marked as followsReset rod 10×80X5GB/T4678.12-200325
GB/T 4678.12-2003
Units are millimeters
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