This part specifies the dimensions and tolerances of push tubes for die casting moulds. This part is applicable to push tubes for die casting moulds. This part also gives material guidelines and hardness requirements, and specifies the marking of push tubes. GB/T 4678.17-2003 Die casting mould parts Part 17: Push tubes GB/T4678.17-2003 Standard download decompression password: www.bzxz.net

GB/T4678 "Die Casting Die Parts" is divided into 19 parts: - Part 1: Templates;
Part 2: Round inserts;
Part 3: Rectangular inserts;
Part 4: Shouldered guide pins;
Part 5: Headed guide pins;
-- Part 6: Headed guide bushings;
Part 7: Straight guide bushings:
- Part 8: Push plates;
Part 9: Push plate guide pins; ||t t||Part 10: Push plate guide sleeve,
-Part 11: Push rod;
-Part 12: Reset rod;
Part 13: Push plate gasket;
Part 14: Limit pin;
Part 15: Pad;
Part 16: Push rod;
-Part 17: Push tube;
-Part 18: Support column;
-Part 19: Positioning element.
This part is Part 17 of GB/T4678. This part is a newly formulated standard.
This part is proposed by China Electrical Equipment Industry Association. Foreword
This part is under the jurisdiction of the National Technical Committee for Standardization of Moulds (SAC/TC33). GB/T 4678.17—2003
The drafting organizations of this part are: Shanghai Pierburg Nonferrous Components Co., Ltd., Guangzhou Cavity Mold Factory, Guilin Electric Science Research Institute, Dongfeng Technology Automotive Braking System Co., Ltd., 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. 71
GB/T4678.17—2003
Die casting die partsbzxZ.net
Part 17: Push tube
This part specifies the dimensions and tolerances of push tubes for die casting dies. This part is applicable to push tubes used in die casting dies. This part also gives material guidelines and hardness requirements, and specifies the marking of push tubes. 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 apply to this part.
GB/T4679—2003 Technical conditions for die casting die parts 3 Dimensions and specifications
See Figure 1 and Table 1.
Surface roughness in microns
Surface roughness Ra=6.3μm; chamfer 1mm×45 not specified Figure 1 Push tube
Material and hardness
Table 1 Push tube dimensions
Material is selected by the manufacturer, and 4Cr5MoSiV1 and 3Cr2W8V are recommended. Hardness 45HRC~～~50HRC
GB/T 4678.17---2003
Unit: mm
After quenching, the surface can be nitrided, the depth of the nitrided layer is 0.08mm~0.15mm, the core hardness is 40HRC~44HRC, and the surface hardness is ≥900 HV.
5 Technical requirements
Should meet the requirements of GB/T4679-2003. 6 Marking
The push tube according to this part should have the following markings: a) Push tube;
Diameter D of the push tube, in millimeters;
Length L of the push tube, in millimeters;
d) Shoulder thickness π of the push tube, in millimeters; e) Code of this part, i.e. GB/T4678.17-2003. Example:
D=2mm, L=80mm, h=5mm push tube is marked as follows: Push tube 2X80×5GB/T 4678.17-—200373
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