This standard specifies the technical requirements, test methods, inspection rules, etc. of electric far-infrared type and core drying furnaces. This standard applies to casting type and core drying furnaces that use electric far-infrared radiation heaters as heat sources. JB/T 8377-1996 Technical conditions for electric far-infrared type and core drying furnaces JB/T8377-1996 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 8377-96
Electric Far Infrared Type, Core Drying Furnace
Technical ConditionsbzxZ.net
1996-04-22 Issued
Ministry of Machinery Industry of the People's Republic of my country
1996-07-01 Implementation
JB/T B377-96
This standard is formulated based on the national level of electric far infrared type, core drying furnace. In order to meet the needs of domestic and foreign trade, technology and economic exchanges, the technical requirements, test methods, inspection rules and other technical contents of electric far infrared type, core drying furnace are now defined. This standard stipulates the technical requirements for each test, and the quality characteristics and features of electric far infrared type, core drying furnace. The electric far infrared type, core drying furnace provided by the supplier shall meet the specified quality requirements. The standard was implemented on July 19, 1996. The standard was proposed and managed by the National Technical Committee for the Standardization of Machinery. The drafting units of this standard are: Jinan Shouzao Machinery Research Institute, Zhucheng Zhuzao Machinery Co., Ltd., Suhuangdao Yaoguang Foundry Machinery Factory. The main drafters of this standard are: Liu Wenyan, Liu Zhi, Meiyong Socks. Scope
Machinery Industry Standard of the People's Republic of China
Electric heating far-infrared type and core drying furnace
Technical conditions
This standard specifies the technical requirements, test methods and inspection rules for electric heating far-infrared type and core drying flat furnace: JB/T 37796
This standard applies to special-purpose carbon-core flat furnaces heated by electric heating far-infrared radio frequency as the heating source (hereinafter referred to as flat furnaces). 2 Referenced standards
The following documents are included in the texts, which are cited in this standard and are the provisions of this standard. When the standard was published, the texts shown are valid. All standards are subject to revision and parties using this standard should consider the possibility of using the latest edition. GE4654-84
Carbonizing defect. Selling sand to buy dense infrared radiation heater general technical conditions GB/T5226.1-1u Industrial electrical equipment: General technical conditions GH 7287. 787
GB 3523-88
JB164191
JB2164-7
JB/T6331.2-2
3 Technical requirements
Infrared heater electric-to-ultraviolet radiation conversion efficiency measurement method Jin Guo first far-infrared radiation heater
General technical conditions for smelting machines
Digong product diagnosis paint station
Casting machinery sound determination method sound pressure level determination method shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the relevant procedures. 3.1 Specifications for protective film
3.1. The protective film should be made of durable and corrosion-resistant materials and can withstand high temperatures during use. The protective film should be connected tightly and the joints should not leak. The sealing material should be flame retardant (reflectivity) and should be selected from materials that meet the requirements of C.7 for far infrared radiation. 33 The drying furnace should be insulated (protected against tearing > the width of the material after the temperature is higher than the commercial temperature of the part when it is used. 3.2 The electrical system of the drying furnace should comply with the relevant provisions of GB/T5225.1: 3.3 Core carrier section
3.3.1 The carrier should run smoothly without jamming. 3.3.2 The carrier should not cause damage to the mold and core during operation due to infrared radiation. 3.3.3 The running rhythm of the carrier should meet the requirements of the drying process. 3.4 Exhaust device and hot air environment system
3.4.1 The drying furnace should have an exhaust device or an exhaust connection. The exhaust device should be flexible, the exhaust should be unobstructed, and it can be adjusted according to the 2. Effective control of non-gas cover.
34.2 The super-wind circulation system should be able to meet the supply process requirements. 3.5 The infrared heat cutter should comply with the provisions of GB4654, GB8623 and other relevant standards and technical documents. 3.6 The outer surface of the drying furnace should be painted in accordance with the provisions of JB2164. The outer surface should be smooth, uniform, and color-effective, and should not have defects such as peeling and cracking:
Approved by the Ministry of Machinery Industry on April 22, 1996
Implementation of 19961#1
3.7 Safety protection of the drying furnace
The furnace protection should be equipped with an explosion relief plate,
JB/T8377 -96
3.7.2 The drying furnace should be equipped with a good grounding device and have a clearly visible "grounding" word or sign: 3.7.3 The electric control box should have overcurrent, overload, undervoltage, overtemperature protection and alarm devices + and be equipped with a temperature display scale control instrument and a switching system. The action should be accurate and the function should be required. 3.7.4 The live parts of the drying furnace ladder should have protective sheets or corresponding other protective measures. The cold-state absolute resistance between the conductive parts of the drying furnace and the shovel parts should not be less than 1.0M9. 3.7.53
The wiring terminals should not be loose or fall off, and there should be no fire phenomenon. The dynamic individual of the drying furnace and the protection line should be able to withstand the standard rate 0I, test voltage is 1500V cold state, 1000V hot state, 3.7.7
1min withstand voltage test, no breakdown or internal connection phenomenon should occur: 3.7.8 Under no-load conditions, the noise level of the drying furnace should not be greater than 5dB (A). 3.8 Performance of drying furnace
3. Information! The drying furnace should be able to work normally under the following environmental conditions: a) Ambient temperature: 40~0
b) Ambient temperature, relative humidity of air is not greater than 85%; d) There is no impact vibration around the drying furnace; d) There is no explosive and corrosive medium around the drying furnace; 3.8.2 During the working process of the drying furnace, check that the accessories and other accessories are not loose, and the electrical contact performance should be good. 3.8.4 Under no-load conditions, the time for heating from 20°C to 200°C should not exceed 4mm. 3.8.5 According to the requirements of the mold and core drying process, the drying chamber can be reversed in the range of 350°C. Under no-load conditions, the maximum temperature difference in the space below the mold and core machine should not be greater than 3.8.6 Under no-load conditions, the unit power consumption from 20°C to 20°C should not exceed the design value. 3.B In the case of Under the appropriate baking conditions, the baked molds and cores should meet the requirements of the manufacturing process, and should not be baked through or dry.
4 Test method
Before the baking furnace is powered on, the electrical wiring and control system should be strictly checked according to the relevant provisions of the user manual, and the test should be carried out under the conditions specified in 3.8.1.
4.1Perform the daily standard determination according to the provisions of 3.1.1.3.3.13.3.3.3.4.1.3.4.3.3.6. 4.2Determination of the temperature rise of the outer surface of the furnace body ||tt ||Select three points on the outer surface of the furnace body and use a thermometer with a resolution of ±0.1°C to measure the temperature. The difference between the standard arithmetic value and the room temperature is the temperature of the furnace body surface.
4.3 Determination of heating time
4.3.1 Under no-load condition, the drying is heated at full power. The time for the temperature reading of the measuring point at the geometric center of the furnace to rise from 20°C to 200°C is the heating time.
4.3.2 The thermometer used for temperature measurement has a resolution of ±0.1°C. 4.3.3 If the temperature inside the furnace is lower than 100°C, when When the working temperature rises to 20℃, hold for 30min, then continue to heat and start timing. When the temperature inside the furnace is higher than 20℃, it should be calculated according to the average rising time. 4.4 Determination of temperature difference in furnace under constant temperature state
When the furnace is fully heated to the specified working temperature, keep the temperature constant onuin, at each temperature measurement point designed for the furnace body (no less than three), use a thermometer with a resolution of ±0.1 to measure point by point. Calculate the arithmetic mean of the three temperature values ​​of each measuring point on the day, and the difference between the maximum arithmetic mean and the arithmetic average value of 2
is the maximum temperature difference. 4.5 Calculation of electric power consumption per unit volume of drying furnace #BT 8377-96
The electric power consumption per unit volume should be calculated using the formula WT
wherein: P—electric power consumption per unit volume of drying furnace, kw.h/m*; W—electric power of drying furnace, kw;
\—heating time, h;
V—volume of charcoal drying furnace, m\.
4. (The sound of the drying oven shall be measured according to the regulations of 31.2. 5 Inspection rules
5.1 Before leaving the factory, each drying oven shall be inspected and qualified. (1)
5.1.2 If there is no special acceptance regulation, the oven shall be inspected in accordance with the regulations of 3.1~3.4.3.6.5.7, 3.8.2.3.8.4, 3.8.5 before leaving the factory. All the inspection items shall be qualified.
5.2 Western inspection
S.1.! Type inspection shall be carried out according to all the items specified in this standard. All the inspection items shall be qualified. 5.2.2. The following internal inspections shall be carried out to verify the status of the equipment. The company shall specify that all items specified in this standard shall be used as acceptance conditions; b) The company shall finalize or certify the equipment:
c) The national quality supervision agency shall conduct a random inspection of the drying furnace. 5.2.3 The national quality supervision agency shall conduct a random inspection on the equipment supplied by the company. Each batch of equipment shall be inspected at random, but not less than one piece. Each piece of equipment shall be inspected in accordance with the provisions of 5.2.1. 6. Packaging, marking, storage and transportation
6.1 The packaging, marking, storage and transportation of the drying furnace shall comply with the provisions of 7.1-7.5 in JB1644-91. 3
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