GB/T 4678.15-2021Die casting dies—Components—Part 15: Spacer blocks (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document is Part 15 of GB/T 4678 "Die Casting Mould Parts". GB/T 4678 has released the following parts.

---Part 1: Template;

---Part 2: Round inserts;

---Part 3: Rectangular inserts;

---Part 4: Square guide post;

---Part 5: Round guide post;

---Part 6: Leading guide sleeve;

---Part 7: Straight guide sleeve;

---Part 8: Push plate;

---Part 9: Push plate guide post;

---Part 10: Push plate guide sleeve;

---Part 11: Putting;

---Part 12: Reset lever;

---Part 13: Push plate washer;

---Part 14: Limit nails;

---Part 15: Block;

---Part 16: Flat putter;

---Part 17: Push tube;

---Part 18: Support column;

---Part 19: Positioning components.

This document replaces GB/T 4678.15-2003 "Die-casting mold parts Part 15: Spacers", compared with GB/T 4678.15-2003, In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Modify the block structure diagram and the letter symbols in the figure according to the standard drawing method (see Figure 1, Figure 1 of the 2003 edition);

b) Modified the description method of chamfering requirements (see Figure 1, Figure 1 of the 2003 edition);

c) Modified and increased the size specifications of the cushion block (see Table 1, Table 1 of the 2003 edition).

Introduction

Die castings have a wide range of applications, involving a considerable number of product fields and industrial categories. Die casting molds are the most effective and most typical for forming die castings.

This type of process equipment is also one of the most widely used mold types.

The standard of die-casting mold parts is the basic technical document for the design, manufacture, inspection and acceptance of die-casting mold parts. The formulation of GB/T 4678 aims to In unifying the basic structure and specifications of die-casting mold parts, standardizing its technical requirements, and improving the product quality of domestic die-casting mold parts and different brands The interchangeability of products reduces production costs. Since there are many types of parts, it is divided into 19 parts according to the number of typical parts of the die-casting mold.

Each part specifies the structure, technical requirements, material requirements, markings, etc. of one of the parts.

GB/T 4678 was first released in 1984.According to the needs of the development of the die-casting mold industry, all parts were carried out for the first time in 2003.

Revised. In recent years, with the development of my country's industry and economy, the design and manufacturing technology of domestic large-scale, precise, and complex high-end die-casting molds has become more and more Mature. At the same time, with the application of new materials, new processes and the requirements of international standards brought by mold exports, the basic dimensions of die-casting mold parts The series, precision requirements, markings, packaging, etc. have all changed.

The National Mold Standardization Technical Committee completed part 1~part 13 and part 19 in 2017 and 2018, a total of 14 Part of the second revision. The revised GB/T 4678.15 is part 15 of GB/T 4678. The standard is revised to make it It can timely and comprehensively reflect the latest mature technology content of the die-casting mold industry, and at the same time, it meets the compilation requirements of GB/T 1.1-2020, and is consistent with the revised The coordination of other die-casting mold parts standards of the company is of great significance to the technological progress and industrial upgrading of the die-casting industry.

1 Scope

This document specifies the structure type and size, material, technical requirements and markings of the cushion block for die-casting mold.

This document applies to spacers for die-casting molds.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 1184-1996 shape and position tolerance without tolerance value

GB/T 4679 Technical Conditions of Die Casting Mould Parts

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Structure type and size

The structure of the pad should meet the requirements of Figure 1, and its size should meet the requirements of Table 1. Surface roughness unit is micron Unfilled surface roughness Ra=6.3µm. All edges should be chamfered C2.