JB/T 7542-1994 General technical requirements for corrugated machines
Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T7542-94
General Technical Conditions for Corrugated Machines
Published on December 9, 1994
Ministry of Machinery Industry of the People's Republic of China
Implemented on October 1, 1995
Machinery Industry Standard of the People's Republic of ChinawwW.bzxz.Net
General Technical Conditions for Corrugated Machines
1 Subject Content and Scope of Application
JB/T7542-94
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of corrugated machines. This standard applies to packaging material processing equipment that processes corrugated base paper into corrugated paper through heated corrugated sheets. 2 Reference standards
GB1184
GB3785
GB5226
GB6388
GB6544
Packaging storage and transportation pictorial symbols
Shape and position tolerances Provisions for unmarked tolerances Electrical and acoustic properties and test methods of sound level meters General technical requirements for machine tools and electrical equipment
Transport packaging receiving and shipping symbols
Corrugated cardboard
GB/T13306 Signs
GB/T13384 Gui
General technical requirements for packaging of electromechanical products
3 Technical requirements
Corrugated base paper
Corrugating machines shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved through the prescribed procedures. 3.11
3.2 Quality requirements for corrugated paper processed by corrugating machines The corrugation type shall comply with the corrugation height and corrugation number specified in Table 2 of GB6544, and the corrugation shape shall be UV-shaped. 3.2.1
The corrugation is uniform and straight, without obvious inverted corrugation, cracking, folding, etc. 3.2.27
The shrinkage unevenness of corrugated paper in the length direction shall not exceed 2%. 3.2.37
3.2.4 The corrugated base paper used for processing corrugated paper shall comply with the provisions of Table 4 of GB6544 and Articles 2.1 to 2.4 of QB548, or other materials of equal or higher quality shall be used.
3.3 The moving parts of the corrugating machine shall operate smoothly and flexibly. The upper and lower corrugated sheets shall mesh normally without interference such as tooth collision. The upper corrugated sheet shall be flexible in lifting and lowering adjustment and firmly locked.
3.4 For corrugated machines with temperature control, the temperature control device should be flexible and reliable within the specified working temperature range, and the temperature control accuracy should be ±20℃. The oil circuit of the corrugated machine lubrication system should be unobstructed to ensure normal lubrication. 3.5
The exposed rotating parts of the corrugated machine should have safety protection devices. 3.6
3.7 The electrical control of the corrugated machine should be safe and reliable, the insulation resistance between the live parts and the metal shell of the machine body should be not less than 1M, and there should be good grounding protection measures. The resistance between the main grounding terminal and any metal parts that may be charged due to insulation damage should not be greater than 0.1α. The working noise of the corrugated machine is not more than 78dB (A). 3.8
3.9 The purchased parts, outsourced parts and raw materials selected for the corrugated machine should be qualified products. 3.10 The service life (i.e. the time to the first repair) of the upper and lower corrugated boards of the corrugated machine should not be less than 10×10h under normal operation and operating conditions.
Approved by the Ministry of Machinery Industry on December 9, 1994
Implemented on October 1, 1995
JB/T754294
3.11 The parallelism error value of the upper corrugating roller to the lower corrugating roller of the corrugator: when the effective width is equal to or greater than 1500mm, it should not be greater than 0.15mm; when the effective width is less than 1500mm, it should not be greater than 0.10mm; for E-type corrugated, it should not be greater than 0.08mm. The circular runout error value of the outer cylindrical surface of the upper and lower corrugating rollers to the common axis of the two end journals shall not be greater than the value specified in the 8th grade tolerance in Table 4 of GB1184.
3.12 The maximum allowable value of the tooth surface roughness R of the upper and lower corrugating rollers shall not be greater than 3.2μm. 3.13 Appearance quality of corrugated machine
3.13.1 The paint layer on the non-processed surface should be flat and smooth, with uniform color, and should not have obvious defects such as dirt, flow marks, bubbles, and repair marks. 3.13.2 The surface-treated parts should have uniform color, and should not have bubbles, layers, spots, rust, etc. 3.13.3 The weld seam of welded parts is flat, without obvious depressions and protrusions. 3.14 Under the condition that the user complies with the installation and use rules of the product, if the product cannot work normally due to poor manufacturing quality within 18 months from the date of shipment and within 12 months from the date of installation by the user, the manufacturer shall repair or replace it for the user free of charge (except for wearing parts). 4 Test method
4.1 Before the corrugated machine leaves the factory, each product must undergo an empty running test and a load test. 4.2 The empty running test of the corrugated machine is first carried out at room temperature, and the running time is not less than 30 minutes. Then turn on the heating power supply to raise the surface temperature of the effective length of the corrugated paper to 180-200℃, and continue to operate at this temperature for 30 minutes, and it should meet the requirements of Article 3.3, and the heating time shall not be more than 30 minutes.
4.3 After the corrugator passes the empty operation test, the load test of pressing corrugated paper is carried out. The test paper adopts a quantitative of 180g/m, and the quality index is not lower than the No. 2 corrugated base paper specified in QB548. Its length and width are about 80% of the maximum effective processing width of the corrugator. The test temperature is selected according to actual work needs.
4.4 Corrugated paper quality determination
4.4.1 When the corrugator is running stably, continuously extract 5 corrugated paper samples, without stretching or compression, naturally lay them flat on the flat plate, and measure them immediately. The results should meet the requirements of Articles 3.2.1 to 3.2.3 respectively. 4.4.2 Select 3 flutes at each end of each sample along the length direction of the flutes, and measure their flute heights with a depth vernier caliper. 4.4.3 Measure the number of flutes within a length of 300 mm with a steel ruler at any position along the length direction of each sample. 4.4.4 Measure the maximum length L and the minimum length L of each sample along its length direction with a steel ruler, and calculate the shrinkage unevenness according to formula (1):
4.5 Temperature control accuracy test
Lau,= Lml × 100%
Set the temperature of the temperature control table to 200°C, turn on the heating power supply, and after about 30 minutes, use a thermometer to measure the surface temperature of the corrugated roller. Measure three points in total, and the measuring points are located at the point where the effective length of the corrugated roll is divided into four equal parts. Measure each point three times, with an interval of 3 minutes each time. Finally, the difference between the set value and the measured value is the temperature control accuracy, which should meet the requirements of Article 3.4. 4.6 Insulation resistance and ground resistance test
Use a megohmmeter with an accuracy of not less than Class 1 and a ground resistance meter (or multimeter) with an accuracy of not less than Class 1.5 in accordance with the provisions of Chapter 13 of GB5226, and the results shall comply with the provisions of Article 3.7. 4.7 Noise measurement
4.7.1 Test instrument: Type 1 sound level meter specified in GB3785. 4.7.2 No obstacles should be placed around the corrugator, and the distance from the wall should not be less than 2000mm. 4.7.3 Microphone measurement point location: The height from the ground and the distance from the corrugator are 1500mm and 1000mm respectively. And select 4 measurement points along the periphery of the corrugator.
4.7.4 When measuring, the background noise (i.e. the ambient noise when the corrugator is not running) should be measured first. Its location is the same as the corrugator noise measurement location. If the difference between the background noise sound pressure level and the noise sound pressure level during the operation of the corrugator is less than 3dB (A), the measurement result is invalid; if the difference 2
JB/T7542-94
is less than 10dB (A) but greater than 3dB (A), the noise of each measuring point of the corrugator is obtained after correction according to Table 1. Table 1
Ln -- Lee
In the table: Ln noise sound pressure level during the operation of the corrugator; Lre
background noise sound pressure level;
ALp——correction value to be subtracted from L. The actual noise of each measuring point is calculated according to formula (2): Lp=LP-AL
4.7.5 Under the load operation state, after measuring the noise at each measuring point, take the highest value, which is the noise sound pressure level of the corrugator, which should meet the requirements of Article 3.8.
4.8 Life of corrugated roller
Comprehensively evaluate based on valid certification materials or operation records provided by the user unit (at least 3). 5 Inspection rules
5.1 Each corrugated machine must be inspected and qualified by the quality inspection department of the manufacturer in accordance with this standard and related standards and technical documents, and can only leave the factory with a product certificate. Product inspection is divided into factory inspection and type inspection. 5.2 Factory inspection
Each product should be inspected at the factory, and the inspection items are 3.2, 3.3, 3.5~3.7, 3.11~3.13. 5.3 Type inspection
5.3.1 Type inspection should be carried out in any of the following situations: a.
Trial production and identification of new products or old products for transfer to factory production; after formal production, if there are major changes in structure, materials, and processes that may affect product performance; b.
When the normal production time is one year.
Type inspection items are all technical requirements specified in this standard. 5.3.3 Sampling rules and judgment methods
5.3.3.1 If the annual output is less than 50 units, sample 1 unit from any batch. For every 50 units increase in annual output, sample 1 unit from any batch. 5.3.3.2 Type inspection is qualified if all requirements of this standard are met. If the inspection fails, double sampling should be carried out. If it still fails, the batch of type inspection is deemed to be unqualified.
6 Marking, packaging, transportation, purchase and storage
Corrugated machines should be fixed with signs in obvious places. The size and technical requirements of the signs should comply with the provisions of GB/T13306. 6.11
The following contents should be marked on the label:
Product model and name;
Main technical parameters of the product;
Manufacturing date and factory number;
Manufacturer name.
6.2Corrugated machines should be packed in boxes when leaving the factory. The boxes should be firm and reliable and should comply with the provisions of GB/T13384. 6.3
The following technical documents should be included in the boxes: a.
Product certificate;
Product manual;
Packing list.
JB/T7542-94
6.4The shipping and transportation operation signs should be clearly marked on the surface of the box and should comply with the relevant provisions of GB6388 and GB191. 6.5Corrugated machines should be stored in a dry and ventilated place. Under normal storage conditions, the product, spare parts, and tools should be guaranteed not to rust within six months from the date of leaving the factory. If it exceeds six months, anti-rust treatment should be performed again. Additional Notes:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Hefei General Machinery Research Institute and Dalian Packaging Machinery Factory. The main drafters of this standard are Wu Ruiping, Liu Hongqing, and Huang Dexian. 4
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