GB/T 21269-2023 (English Version)

Standard No.: GB/T 21269-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21269-2023
Replace: GB/T 21269-2018

Scope: This document specifies the basic parameters, performance, safety, environmental adaptability and other technical requirements of cold chamber die casting machines (including horizontal cold chamber die casting machines and vertical cold chamber die casting machines), describes the corresponding test methods and inspection rules, and specifies the contents of marking, packaging, transportation and storage. This document is applicable to the design, manufacture, acceptance, packaging, transportation and storage of cold chamber die casting machines.

Introduction

In-depth interpretation of GB/T 21269—2023 National Standard for Cold Chamber Die-casting Machine

1. Analysis of standard revision background and technological evolution

Since its first release in 2007, this standard has been revised twice, in 2018 and 2023 respectively. This revision mainly focuses on the following aspects:

Added normative references to GB/T25370 and GB/T37371-2019
Updated term definitions, especially concepts such as "idle cycle time" and "hydraulic accumulator"
Optimized injection performance parameters and test methods
Enhanced safety requirements and technical indicators

2. Comparative analysis of standard frameworks

Standard version	Main technical changes	Scope of application	Core indicators
GB/T 21269-2007	For the first time, technical requirements and test methods for cold chamber die casting machines were established	Applicable to the design, manufacture and acceptance of horizontal and vertical cold chamber die-casting machines	Basic parameters such as clamping force and injection performance
GB/T 21269—2018	Increased cleanliness and energy efficiency grade requirements	Added technical requirements for built-in clamps	Detailed safety and environmental protection requirements
GB/T 21269—2023	Optimized term definitions and inspection methods	Expanded the range of injection performance parameters	Added closed-loop real-time control function requirements

3. Interpretation of core technical requirements

The performance and technical parameters of cold chamber die casting machines are the core content of this standard. The following are the main technical requirements:

Clamping force range:From 6,300 kN to 60,000 kN, suitable for die casting production of different scales.

Injection performance:The maximum air injection speed and pressure build-up time are clearly specified according to different clamping force levels (Table 1, Table 2).

Safety requirements:Comply with GB/T 20905 and GB/T 20906, and add safety specifications for emergency stop devices and hydraulic accumulators.

Energy consumption level:Clear energy efficiency requirements for servo drives and three-phase asynchronous motors, and meet the minimum level 3 and 4 standards in GB/T39962-2021.

4. Implementation Suggestions

To ensure the effective implementation of the standard, the following measures are recommended:

Enterprise level:Organize technical personnel to conduct standard training to ensure understanding and implementation.

Production stage:Design and manufacture die-casting machines in strict accordance with the new standards, with particular attention to the improvement of energy efficiency and safety performance.

Testing agency:Establish testing methods and equipment that meet the requirements of the standard to ensure the accuracy of the test results.

User feedback:Collect users' questions and suggestions in actual use to promote further improvement of the standard.

GB/T 21269-2023 Referenced Document

GB 20905 Safety requirements for foundry machinery
GB 2893 Safety colours
GB 2894 Safety signs and guideline for the use
GB/T 13306 Plates
GB/T 1348-2019 Spheroidal graphite iron castings
GB/T 158 Machine tool tables--T-slots and corresponding bolts
GB/T 16754 Safety of machinery—Emergency stop function—Principles for design
GB/T 17421.1-1998 Test code for machine tools. Part 1: Geometric accuracy of machines operating under no-load or finishing conditions
GB/T 1800.1 Geometrical product specifications (GPS)—ISO code system for tolerances on linear sizes—Part 1: Basis of tolerances, deviations and fits
GB/T 191 Packaging.Pictorial marking for handling of goods
GB/T 25370 Foundry machinery—Vocabulary
GB/T 31562 Method for determination of cleanliness of foundry machinery*， 2024-09-29 Update
GB/T 37371-2019 Die casting units—Terminology
GB/T 3766 Hydraulic fluid power.General rules and safety requirements for systems and their components
GB/T 39962 Die casting machine—Energy efficiency limits and energy efficiency rating
GB/T 5226.1-2019 Electrical safety of machinery—Electrical equipment of machines—Part 1:General requirements
GB/T 7932 Pneumatic fluid power-General rules and safety requirements for systems and their components
GB/T 7935 液压元件通用技术条件
GB/T 9969 General principles for preparation of instructions for use of industrial products
JB/T 8356 Inside-small wood box for packing of machine tools

GB/T 21269-2023 history
2023 GB/T 21269-2023 Cold chamber die casting machine
2018 GB/T 21269-2018 Cold chamber die casting machines
2007 GB/T 21269-2007 Cold chamber die casting machines