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GB/T 39929-2021 English PDF

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GB/T 39929-2021: Footwear manufacturing machines - Shoe and leather presses - Safety requirements
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 39929-20211169 Add to Cart 7 days Footwear manufacturing machines - Shoe and leather presses - Safety requirements Valid

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Basic data

Standard ID: GB/T 39929-2021 (GB/T39929-2021)
Description (Translated English): Footwear manufacturing machines - Shoe and leather presses - Safety requirements
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y99
Word Count Estimation: 63,675
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39929-2021: Footwear manufacturing machines - Shoe and leather presses - Safety requirements

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Footwear manufacturing machines - Shoe and leather presses - Safety requirements ICS 61.080 Y99 National Standards of People's Republic of China Safety Requirements for Shoemaking Machinery Compression Molding Machine Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ Introduction Ⅱ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Safety requirements/protective measures 5 5 Verification of safety requirements/protective measures 13 6 Usage information 20 Appendix A (informative appendix) List of major hazards 22 Appendix B (informative appendix) Model diagram 24 Appendix C (Normative Appendix) Requirements for Safety Tools 37 Appendix D (Normative Appendix) Safety Travel Device Requirements 38 Appendix E (Normative Appendix) Requirements for Protective Devices 39 Appendix F (Normative Appendix) Requirements for interlocking guards with or without guard locks 41 Appendix G (Normative Appendix) Requirements for Trip Device 42 Appendix H (Normative Appendix) Requirements for Pressure Sensitive Pads and Pressure Sensitive Boards 45 Appendix I (normative appendix) Requirements for two-hand control devices 46 Appendix J (Normative Appendix) Requirements for protective devices with control functions (interlocking protective devices with starting function) 48 Appendix K (Normative Appendix) Keep-operation control device requirements 49 Appendix L (Normative Appendix) Burn threshold temperature 51 Appendix M (Normative Appendix) Double Fail Safe Control System 52 Appendix N (Normative Appendix) Requirements for Stop-Release Control Devices 53 Appendix O (Normative Appendix) Control Method for Suspension of Safety Devices 54 Appendix P (Normative Appendix) Key items and requirements for the planning, design and construction of automated manufacturing systems 55 Appendix Q (Informative Appendix) Noise Test Specification for Compression Synthesizer 57 Safety Requirements for Shoemaking Machinery Compression Molding Machine

1 Scope

This standard specifies the structure, transportation, installation, commissioning, setting, teaching or process conversion, operation of the compression molding machine (hereinafter referred to as the "machine") Relevant safety requirements for operation, cleaning, and maintenance. This standard includes all aspects related to the machine within the scope of this standard caused by the operator's expected use of the machine and foreseeable misuse. Major hazards, dangerous states and dangerous events (see Appendix A). This standard is applicable to the compression molding machine used in the shoe industry to obtain various shoe parts by bending and extrusion molding methods, including. shoes and Leather automatic compression molding machine (including thermoplastic main heel pre-forming machine, main heel pressing machine, integrated manufacturing system, with movable or rotating structure workstation Compression molding machine), outsole bonding molding machine, outsole and insole molding machine, back setting machine, reinforcement and lining and toe cap laminating machine, ironing press, beater Labeling machine (hot stamping, labeling and embossing), stitch embossing machine, upper preforming machine, folding machine, activation machine, last drawing machine, palm laminating machine, button bag For leather machines, etc., see Appendix B for model diagrams. This standard does not apply to. ---Cutting machine and punching machine; ---Laminating machine for shoe eyes, magic belt and decorative buckle; ---The pressing machine used for repairing shoes or making orthopedic shoes.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components GB/T 5226.1-2019 Electrical safety of machinery Electrical equipment of machinery Part 1.General technical conditions GB/T 7932 General rules and safety requirements for pneumatic systems and their components GB/T 8196-2018 General requirements for the design and manufacture of fixed and movable protective devices for mechanical safety protection devices GB 12265.3-1997 The minimum distance for mechanical safety to avoid extrusion of various parts of the human body GB/T 14048.5-2017 Low-voltage switchgear and control equipment Part 5-1.Control circuit electrical appliances and switch parts electromechanical Control circuit electrical GB/T 15241.2 Ergonomic principles related to mental load Part 2.Design principles GB/T 15706-2012 General Principles of Mechanical Safety Design Risk Assessment and Risk Reduction GB/T 16754-2008 Mechanical safety emergency stop design principles GB/T 16855.1-2018 Safety-related components of machinery safety control system Part 1.General design rules GB/T 17421.5-2015 General Rules for Inspection of Machine Tools Part 5.Determination of Noise Emissions GB/T 17454.1-2017 Mechanical safety pressure-sensitive protective device Part 1.Design and test of pressure-sensitive mat and pressure-sensitive floor General rule GB/T 17888.1 Mechanical safety access to fixed facilities of machinery-Part 1.Selection of fixed facilities and general requirements for access GB/T 17888.2 Mechanical safety access to fixed facilities of machinery Part 2.Working platforms and passages GB/T 18153-2000 Ergonomics data for determining the temperature limit of hot surface temperature for mechanical safety accessible surface temperature GB/T 18209.1 Machinery and electrical safety instructions, signs and operations Part 1.Requirements for visual, auditory and tactile signals To protect. ---Safety tools complying with Appendix C; ---Comply with GB/T 8196-2018 and appendix E movable enclosed protective device and protective cover or guardrail; ---Interlock protection device in accordance with Appendix F; ---The trip device conforms to G.1 and G.2; --- Two-hand control device in accordance with I.1. 4.2.1.3.2 Different from the requirements of 4.2.1.3.1, for the compression molding machine that needs to enter the dangerous area frequently for routine operation, only the requirements are Use one of the following protective devices. ---The protective device with control function in accordance with 4.3.9.2 and Appendix J; ---According to G.2.2 or G.3 with or without control function of electro-sensitive protection equipment; --- Two-hand control device in accordance with I.2. 4.2.1.3.3 For multi-person-operated compression molding machines, each operator shall have the safety protection measures required in 4.2.1.3.1. 4.2.1.3.4 4.2.1.3.1 is not applicable in the following cases. ---The workpiece needs to be held by hand due to its shape or size; --- Dangerous actions can only be triggered by the holding-operation control device that complies with K.2 in Appendix K. 4.2.1.4 Priority protection devices In order to avoid entering the dangerous area from the back and side of the machine, the frame type compression molding machine and the fully automatic compression molding machine should be used in priority. Protect one of the following protective devices. ---Fixed enclosed protective device in accordance with GB/T 8196-2018 and E.4; ---Fixed protective cover conforming to E.1 and E.4; ---Interlocking protection device in accordance with GB/T 18831-2017. 4.2.1.5 Exemption from safety protection In the following situations, 4.2.1.3.1 and 4.2.1.3.2 are not applicable, and safety protection is not required. ---If the maximum force of the moving parts is limited to 150N and the contact pressure is limited to 50N/cm2; ---According to the provisions of Table 4 in GB/T 23821-2009, the feed gap between the moving surfaces in the operating area does not exceed 8.0mm, And the distance from any gap to the nearest dangerous point is greater than 20mm. 4.2.1.6 Operator standing area 4.2.1.6.1 In order to prevent slipping, tripping and falling, the surface of the area where the operator stands for frequent manual operations should be treated with anti-skid treatment and should be Avoid steps and protrusions. 4.2.1.6.2 The foot controllers that trigger dangerous actions and are not firmly connected to the machine, as well as the foot controllers in the working position, should be mentioned. A protective cover for the foot controller is provided to prevent accidental operation. 4.2.2 Additional safety devices 4.2.2.1 Emergency stop device 4.2.2.1.1 The emergency stop device should meet the requirements of GB/T 16754-2008, and any form of emergency stop device should have GB/T 5226.1- Features required by 9.2.3.4.2 in.2019. 4.2.2.1.2 For the compression type machine with time control and hold function, the emergency stop device should be designed such that when it is triggered, the controlled parts return immediately starting point. 4.2.2.1.3 The control brake of the emergency stop device of the compression molding machine that needs to use both hands to support the workpiece in a dangerous state should be designed and It is installed so that it can be triggered without hands. 4.2.2.2 Mode selection device 4.2.2.2.1 Machines that have several operating modes or can be operated by multiple safety devices in different modes shall be equipped with The mode selection device required by 6.2.11.9 and 6.2.11.10 in GB/T 15706-2012.Each state should use a lock or access code, etc. Type to lock. 4.2.2.2.2 Operation modes include automatic control operation, manual control operation, tool replacement and adjustment, etc. 4.2.2.2.3 The mode selection action itself should not start the machine. The starting of the machine should be independently controlled by the operator. 4.2.3 Electrical equipment 4.2.3.1 The basic requirements for electrical systems and equipment are as follows. ---AC power supply should comply with the provisions of 4.3.2 in GB/T 5226.1-2019; DC power supply should comply with GB/T 5226.1-2019 The provisions of 4.3.3; --- All circuits or components should be protected in accordance with the provisions of 6.2 of GB/T 5226.1-2019; ---Stop operation should meet the requirements of 9.2.3.3 and 9.2.3.4 in GB/T 5226.1-2019, and the stop function and emergency disconnection are Class 0; ---Failure control shall comply with the provisions of 9.4.1 and 9.4.2 in GB/T 5226.1-2019, and shall be protected in accordance with 9.4.3; ---The enclosure protection level should be in accordance with the provisions of 11.3 in GB/T 5226.1-2019, at least IP54. The safety-related components of the control system shall also meet the requirements of 4.2.9.7 and 4.2.9.8. 4.2.3.2 All operation control devices that need to be regularly adjusted for changing program settings should be installed outside the electric control cabinet. Note. The controller needs to adjust the program frequently, including changes in feed, speed, time, temperature or pressure. 4.2.4 Thermal protection For those hot surfaces that are not directly needed during the working process within the accessible range, safety devices should be avoided or installed to avoid accidental connection. touch. The surface temperature should not exceed the burn threshold of relevant materials given in GB/T 18153-2000 and the contact time should be less than 1s. Refer to Appendix L for a list of selectable burn thresholds based on GB/T 18153-2000. 4.2.5 Noise control at the design stage Technical means and related information to control noise from the source, such as machine parts, tools, pneumatic, hydraulic and exhaust equipment, etc., should be in the machine design To be considered in the calculation process, see GB/T 25078.1.The possible ways to reduce noise during the design process are as follows. a) Reduce vibration through static and dynamic balance of rotating parts; b) Reduce the vibration of the machine itself by reducing the mass of moving parts and reducing their acceleration; c) Reduce the effect of clearance by increasing the preload of the rolling bearing; d) Select and design appropriate energy conversion components to eliminate jitter; e) Select and design appropriate transmission components (such as gears, pulleys, belts, bearings, etc.); f) Consider increasing the damping vibration and avoid structural resonance when designing the structure; g) Appropriate pneumatic exhaust muffler and hydraulic circuit damping. Note. The noise reduction programs listed above are not all methods. Manufacturers can use other noise reduction with equivalent function or better effect Measures. 4.2.6 Smoke that damages health 4.2.6.1 The flue gas control shall be carried out according to the latest technological level and the requirements of Chapter 6 of GB/T 18569.1-2020.For possible production In areas where there is fumes harmful to health, the machine should be designed to be able to connect to an external exhaust system. Because the processing process included in this standard can be The range of flue gas that can be generated is too large, and this standard cannot give more detailed flue gas treatment measures. Note. Harmful fumes, such as hot melt adhesives, solvents, adhesives, and fumes generated during leather embossing. If necessary, the manufacturer shall provide internal ventilation equipment or set up an interface connected to an external ventilation system. 4.2.6.2 Compression molding machines using hot melt adhesives should use thermal fuse or multiple thermostat for overheating protection to ensure that no factors are caused. A large amount of smoke is released due to overheating. 4.2.7 Ergonomics The machine design should consider the human ergonomics described in GB/T 15706-2012 6.2.8 and GB/T 18717.1, GB/T 18717.2 Principles of learning. Special consideration should be given to the following when designing. ---Operation height; ---According to GB/T 15241.2, make the operator's posture and movements comfortable; --- Make entry easier, and control drive compatibility is good; ---According to GB/T 18717.1, GB/T 18717.2, GB/T 17888.1, the operator enters the working position, if necessary, should press GB/T 17888.2 provides a suitable horizontal platform; ---Design the display device according to the requirements of GB/T 20528.1; ---Install additional local lighting according to the requirements of GB/T 28780. 4.2.8 High pressure fluid system The hydraulic system or pneumatic system shall meet the requirements of 6.2.10 in GB/T 15706-2012 and GB/T 3766 and GB/T 7932. In order to prevent being worn by other parts of the machine, the hose carrying high-pressure liquid or gas should be far enough away from other parts or protected by Device protection. 4.2.9 Control system 4.2.9.1 The control system requirements are as follows. ---Electrical system. should meet the requirements of Chapter 9 in GB/T 5226.1-2019; ---Pneumatic system. should meet the requirements of GB/T 7932; ---Hydraulic system. should meet the requirements of GB/T 3766. 4.2.9.2 If a protective device with control function (3.27.6 defined in GB/T 15706-2012) is used in the machine, it shall also comply with GB/T 15706-2012 6.3.3.2.5, GB/T 18831-2017 and Appendix J requirements. The places where closing the protective device may restart the dangerous action of the machine are limited to. a) Every operation process needs to enter the protected area; b) It is impossible to enter the area enclosed by the protective device. The guard should be completely closed before the machine is operated. The protective device with control function can be controlled manually or by power. If the protective device with control function is power-controlled, turn off The closing action can be started by a button, timer or single-beam photoelectric device, and the safety-related components of the control system should at least comply with PLb in GB/T 16855.1-2018. Unless it meets the requirements of 4.2.1.4, the power-operated protective device should be equipped with a tripping device that meets G.1. Where frequent access to the work area is required, the power-operated protective device should be manually activated. 4.2.9.3 The area where the electro-sensitive protection device is installed on the machine, once the protection of the electro-sensitive protection device protection area is cancelled by the operator, the action may be Automatic restart [when the restart area meets the requirements of a) and b) in 4.2.9.2]. Electro-sensitive protection equipment shall meet the requirements of G.3. 4.2.9.4 For machines that do not need to enter the processing area for normal operation (automated machines), close the protective device and the machine should not be heavy. Start, only after leaving the area protected by electro-sensitive protective equipment and triggering a manual controller can it be restarted. 4.2.9.5 The interlocking device for safety protection and restraining safety protection shall be controlled only by the position sensor. The electrical position sensor shall comply with GB/T 14048.5-2017 requirements. Separate pressure, time or program control interlocking commands are not allowed. 4.2.9.6 According to GB/T 19670-2005, appropriate measures shall be taken to prevent all hazards related to power supply failure, including power instability Unexpected restart after the power supply is interrupted or when the control circuit is cut off. To prevent uncontrollable dangerous actions caused by gravity in the case of power failure, the following should be set. ---Mechanical restraint or friction mechanical restraint device with automatic function. or ---A gas-liquid control system controlled by an additional control check valve (check valve). If feasible, install directly on the cylinder through the valve seat on. When it is not possible to install directly, there should be a rigid pipe with a flange or a welded pipe joint between the valve and the cylinder. For electro-pneumatic controlled machines, pressure switches are usually used to prevent uncontrollable dangerous actions caused by unexpected power restart. 4.2.9.7 Unless otherwise required in 4.2.9.8, 4.2.9.9 or 4.3, the safety-related components of the control system shall. ---At least the same safety level as the protective device; ---At least meet the PLc in GB/T 16855.1-2018. 4.2.9.8 The safety-related components of the control system shall be designed so that the failure of any electronic component cannot cause the automatic start of dangerous actions, and shall At least meet the PLd in GB/T 16855.1-2018, except for emergency stop systems. Control system safety related department of emergency stop system The parts should at least meet the PLc in GB/T 16855.1-2018. When using PLc based on risk assessment, the test interval should be as short as possible and should not exceed 4h. The use of programmable electronic systems (PES) should not degrade any safety level. When the machine is equipped with a programmable electronic system (PES), Safety-related functions should not rely solely on their realization. Safety requirements can be achieved by using the following methods. ---Additional hardware control system; ---Redund......
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