JB/T 8496-1996 Technical requirements for resin sand reclamation equipment
Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T 8496-96
Resin Sand Regeneration Set
1996-11-07 Issued
Ministry of Machinery Industry of the People's Republic of China
Technical Conditions
1997-01-01 Implementation
JB/T8496-96
This standard is formulated based on the current level of resin sand regeneration set in my country. In order to meet the needs of domestic and foreign trade, technology and economic exchanges, it stipulates the technical requirements, test methods, inspection rules and other technical contents of resin sand regeneration set. The various technical requirements stipulated here involve the quality characteristics and features that resin sand regeneration set should have. The resin sand regeneration set provided by the supplier shall meet the specified quality requirements. This standard shall be implemented from January 1, 1997. All resin sand regeneration set products from January 1, 1997 shall comply with the provisions of this standard.
This standard is proposed and managed by the National Technical Committee for Foundry Machinery Standardization. The drafting units of this standard are: Jinan Foundry and Forging Machinery Research Institute, Wuxi Hongqi Foundry Cleaning Equipment Factory. The main drafters of this standard are: Liu Tongqing, Xu Zugen, 1 Scope
Machinery Industry Standards of the People's Republic of China
Technical Conditions for Complete Sets of Resin Sand Regeneration
This standard specifies the technical requirements, test methods, inspection rules, etc. for complete sets of resin sand regeneration. This standard applies to complete sets of resin sand regeneration (hereinafter referred to as complete sets) other than thermal regeneration. 2 Referenced Standards
JB/T 8496—96
The provisions contained in the following standards constitute the provisions of this standard by being cited in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB 150—89
GB 985—88
GB/T5226.1—1996
GB 7932—87
JB1644—91
JB/T 5364—91
JB/T 5548— 91
JB/T 6331. 2 - 92
3 Technical requirements
Steel pressure vessels
Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded weldingElectrical equipment for industrial machineryPart 1: General technical conditionsGeneral technical conditions for pneumatic systems
General technical conditions for foundry machinery
Technical conditions for painting of sand treatment and cleaning equipmentTechnical conditions for safety protection of foundry machinery
General technical conditions for electric exciters
Method for determination of noise in foundry machineryDetermination of sound pressure levelThe complete set of equipment shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.1The structure and configuration type of the complete set of equipment shall be compatible with the resin sand process conditions. Due to the different structures and various configuration types of the complete set of equipment, the supply and demand parties shall consider the adaptability of the complete set of equipment to the resin sand process conditions when determining the complete set of equipment and configuration.
If there is no special agreement, the structure and configuration type of the complete set of equipment shall be determined by the supplier. 3.2 The materials, mechanical properties and physical properties of various parts shall comply with the provisions of relevant standards or technical documents. 3.3 The electrical system and pneumatic system shall comply with the provisions of GB/T5226.1 and GB7932 respectively. 3.4 The nameplate and label of the complete set of equipment shall comply with the provisions of JB1644. 3.5 The welding of metal structural parts shall comply with the provisions of GB985. The weld should be flat and should not have defects such as pores, slag inclusions, cracks, etc. The welding slag should be cleaned up. Under normal use conditions, the weld should not crack. 3.6 The design, manufacture, inspection and acceptance of pressure vessels shall comply with the provisions of GB150, and shall follow the laws, regulations and provisions promulgated by the state on pressure vessels.
3.7 The electric vibrator shall comply with the provisions of JB/T5548. 3.8 The safety protection of the complete set of equipment shall comply with the relevant provisions of JB5545. 3.9 High-speed rotating parts such as impellers or turntables should be subjected to static balance tests and calibration, and their unbalanced torque should not be greater than 0.015N·m. 3.10 Each unit and connection part should not leak sand. 3.11 The painting of the complete set of equipment should comply with the provisions of JB/T5364. Approved by the Ministry of Machinery Industry on November 7, 1996
Implementation on January 1, 1997
JB/T 8496-96
3.12 Each unit of the complete set of equipment should comply with the provisions of relevant standards or technical documents. 3.13 The complete set of equipment should be equipped with a dust removal system or a dust removal interface. 3.14 The magnetic induction intensity of the roller surface of the magnetic separator should comply with the following provisions: a) When the production rate of the complete set of equipment is not greater than 4m/h, the surface magnetic induction intensity should not be less than 0.11T; b) When the production rate of the complete set of equipment is greater than 4m3/h, the surface magnetic induction intensity should not be less than 0.14T. 3.15 Idle operation and load operation
The idle operation time should not be less than 2h. After the idle operation, load operation should be carried out at rated production rate, and the load operation time should not be less than 4h. 3.15.1 Each motion mechanism should operate normally, and there should be no abnormal friction, collision and other interference phenomena between adjacent parts. The electrical control system should be coordinated and sensitive. bZxz.net
The action of the pneumatic system should be flexible and accurate, and there should be no air leakage. Each single machine should be able to operate normally under the rated production rate specified in the technical documents without abnormal phenomena. 3.15.4
The various parts of the complete set of equipment should cooperate and be coordinated, and there should be no jamming. 3.15.5
All pipelines should not leak water, air, sand or oil. The opening and closing of each valve should be flexible and reliable. 3. 15. 6
Under the rated production rate conditions, the dust emission concentration of the dust collector equipped with the complete set of equipment to the atmosphere should comply with the relevant regulations of the national environmental protection department.
Under idling conditions, the noise of airflow impact type complete sets shall not be greater than 93dB (A), and the noise of other complete sets shall not be greater than 85 dB (A).
The productivity of the complete set shall meet the design requirements. 3. 15. 10
The operating instructions of the complete set shall specify the resin sand process conditions that the complete set can adapt to under normal use conditions. Under the conditions of resin sand process, the stripping rate of the complete set for old sand shall be within the range of 10% to 35%. 3. 15.11
3. 15, 13
3. 15. 14
The sand temperature adjusted by the sand temperature regulator shall be within the range of 25~30℃. The difference between the regenerated particle size distribution after regeneration of the complete set and the particle size distribution of the new sand regenerated this time shall not be greater than one sieve number. The recovery rate of regenerated sand after regeneration of the complete set shall be greater than 92%. The content of fine powder in the regenerated sand should be less than 1%.
4 Test method
4.1 The noise of the complete set of equipment shall be measured in accordance with the provisions of JB/T6331.2. 4.2 The dust emission shall be measured in accordance with the relevant regulations of the national environmental protection department. 4.3 Determination of the productivity of the complete set of equipment
When the complete set of equipment is in normal production, the mass of the regenerated sand within 30 seconds shall be weighed every 1 hour, and this shall be carried out three times in sequence. The average value of the three weighing values shall be taken as the productivity of the complete set of equipment.
4.4 Determination of the demolding rate of old sand by the complete set of equipment 4.4.1 Under the resin sand process conditions stipulated by the parties to the agreement, after 10 cycles of resin sand regeneration, take 100 pieces of old sand and regenerated sand in the same regeneration cycle from the outlet of the sand block crusher and the regenerated sand storage hopper, and evenly spread them on paper. Use a spoon to randomly take five portions of old sand and regenerated sand from different places, 3g each, accurate to 0.001g, place them in a porcelain boat, heat to 1000-1050℃, keep warm for 30 minutes, dry and cool to room temperature. 4.4.2 Measure the ignition loss of the old sand and regenerated sand respectively, and take their arithmetic mean. 4.4.3 Calculate according to formula (1), and the calculation result is the demolding rate of the complete set of equipment. R,=× 100%
Wherein: R.—Demolding rate,
L2—Loss on ignition of old sand, g;
LLoss on ignition of regenerated sand, g.
4.5 Determination of temperature of regenerated sand
JB/T 8496—96
During the normal operation of the complete set of equipment, use a thermometer with a resolution of 0.2C to measure the temperature of the regenerated sand at the entrance of the regenerated sand storage hopper every 30 minutes. Measure three times and take the arithmetic mean, which is the temperature of the regenerated sand. 4.6 Determination of recovery rate of regenerated sand
Weigh the mass of the old sand before regeneration and the regenerated sand after treatment by the complete set of equipment in unit time respectively, and calculate according to formula (2). The calculation result is the recovery rate of regenerated sand.
Wherein: S.—-Regeneration sand recovery rate;
W×100%
Su=W,
W—mass of old sand regenerated per unit time (including unbreakable amount and fine powder, excluding magnetic separation waste only), kg: W,——mass of regenerated sand per unit time, kg. 4.7 Determination of fine powder content
Under the resin sand process conditions specified by the parties to the agreement, after 10 cycles of resin sand regeneration, take 1000g of regenerated sand in the same regeneration cycle from the regenerated sand storage hopper, evenly spread it on paper, and use a spoon to randomly take three portions of regenerated sand from different places, each portion of 100g, accurate to 0.01g. Sieve with a 127μm sieve respectively, weigh the mass of the material under the sieve, take the arithmetic mean, and calculate the weight percentage with the average mass of the sand sample. The calculated result is the fine powder content. 4.8 Determination of magnetic induction intensity of magnetic separator
Take 10 points within the range of the sector magnetic block and at equal distances along the axis direction, and use a Tesla meter to measure the Tesla value of each point along the axis. The maximum value is the magnetic induction intensity value. However, there should be no zero value at each point along the axis. 4.9 If the supplier does not have the conditions for idling and load operation of the complete set of equipment, it is allowed to be carried out on the demand side, but the supplier should conduct idling test for each single machine.
5 Inspection rules
5.1 Factory inspection
5.1.1 The complete set of equipment shall be inspected and qualified by the supplier before it can be shipped. 5.1.2 If there is no special agreement, it shall be inspected according to the provisions of 3.1~~3.14 before leaving the factory, and all the inspected items shall be qualified. 5.2 Type inspection
5.2.1 Type inspection shall be carried out according to all items specified in this standard, and all the inspection items shall be qualified. 5.2.2 Type inspection shall be carried out in any of the following situations: a) The order agreement clearly stipulates that all items specified in this standard shall be taken as acceptance conditions; b) The complete set of equipment is finalized or identified;
c) The national quality supervision agency conducts a random inspection of the complete set of equipment. 5.2.3 The type inspection conducted by the national quality supervision agency for the supervision and random inspection of the complete set of equipment shall be carried out on 5% of each batch of complete sets of equipment, but not less than one unit, and each complete set of equipment shall comply with the provisions of 5.2.1. 6 Packaging, marking, storage and transportation
The packaging, marking, storage and transportation of the complete set of equipment shall comply with the provisions of 7.1 to 7.5 of JB1644-91. 3
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