GB/T 20956-2025Printing machinery - Safety technical specification for cutting equipment (English PDF)

Foreword

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

This document supersedes GB/T 20956-2007 "Design and Structural Safety Rules for Paper Cutters of Printing Machinery" and is consistent with GB/T 20956-2007.

In comparison, aside from structural adjustments and editorial changes, the main technical changes are as follows.

a) Added technical parameters for "paper clamp," "cutting cycle," "cutting area," "high-pressure clamping," "low-pressure clamping," "manual clamping," and "safety distance."

Terms and definitions (see 3.12–3.18);

b) The content for "Book Margin Index Digging Machine" has been deleted (see Table 1 in the.2007 edition);

c) The sections on "small paper cutters" and "fire and explosion hazards" have been added (see Table 1);

d) A section on "General Requirements" has been added (see 5.1);

e) The requirements for "paper cutter" have been changed (see 5.2,.2007 edition of 5.2);

f) The requirement for "paper cutters equipped with paper feeding and unloading devices" has been changed (see 5.3,.2007 edition of 5.3);

g) The requirement for a "small paper cutter" has been added (see 5.4);

h) The requirement for a "book margin indexing tool" has been removed (see 5.4 in the.2007 edition);

i) The requirement for a "manual book feeder with three-sided book trimmer" has been added (see 5.6);

j) The testing methods for "Safety Requirements or Measures" have been changed (see Chapter 6, Chapter 6 of the.2007 edition);

k) The “Safety distance for photoelectric protection device (ESPD) of paper cutter” has been changed (see Appendix A, Appendix A of the.2007 edition).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Standardization of Printing Machinery (SAC/TC192).

1 Scope

This document specifies the major hazards of cutting equipment, safety requirements or measures, inspection of safety requirements or measures, and instructions for use.

This document applies to paper cutters, paper cutters equipped with paper feeding and unloading devices, small paper cutters, three-sided book cutters, rotary cutters, and circular cutters.

Cutting equipment such as corner cutting machines and label punching machines.

This document does not apply to longitudinal slitting machines and roll-to-sheet paper cutting machines.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

GB/T 3836.28-2021 Explosive Atmospheres – Part 28: Basic Methods and Requirements for Non-Electrical Apparatus for Explosive Atmospheres

GB/T 5226.1-2019 Electrical Safety of Machinery - Electrical Equipment of Machinery - Part 1: General Technical Conditions

GB/T 8196 General requirements for the design and manufacture of fixed and movable protective devices for mechanical safety.

GB/T 14048.5 Low-voltage switchgear and controlgear – Part 5-1.Control circuits, electrical appliances and switching elements, electromechanical control Circuits and electrical appliances

GB/T 15706-2012 General Principles for Safety Design of Machinery. Risk Assessment and Risk Reduction

GB/T 16855.1-2025 Mechanical Safety - Safety Control Systems - Part 1: General Design Principles

GB/T 16856 Guidelines and Examples of Methods for Implementing Mechanical Safety Risk Assessment

GB/T 17454.1 Mechanical safety pressure-sensitive protection devices - Part 1: General rules for design and testing of pressure-sensitive pads and pressure-sensitive floors

GB/T 17799.2 General standards for electromagnetic compatibility – Part 2: Immunity standards in industrial environments

GB/T 18209.1 Electrical safety indications, signs and operation of machinery - Part 1: Requirements for visual, auditory and tactile signals

GB/T 18209.2 Electrical and mechanical safety indications, signs and operation – Part 2: Signage requirements

GB/T 18831-2017 Design and selection principles for interlocking devices related to mechanical safety and protective devices

GB/T 19436.1 Mechanical and electrical safety - Electrically sensitive protective devices - Part 1: General requirements and tests

GB/T 19436.2 Electrical Safety Equipment for Machinery - Part 2: Equipment Using Active Photoelectric Protective Devices (AOPDs) Special requirements

GB/T 19670 Safety of Machinery - Prevention of Accidental Start