This standard is a combined revision of the original ZB G95 009.1-88 and ZB G95 009.2-88 standards. This standard is proposed and managed by the National Rubber and Plastic Machinery Standardization Technical Committee Plastic Machinery Standardization Technical Committee. This standard specifies the basic parameters, technical requirements, test methods and inspection rules, marking, packaging, transportation and storage of single-screw plastic extruders. This standard applies to single-screw plastic extruders for processing plastic products, not to special extruders. JB/T 8061-1996 Single Screw Plastic Extruder JB/T8061-1996 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T8061-96
Single Screw Plastic Extruder
Published on September 3, 1996
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1997
JB/T8061-96
This standard is a combined revision of the original standards ZBG95009.188 "Single Screw Plastic Extruder" and ZBG95009.2-88 "Single Screw Plastic Extruder Test Method". This version has changes in the following chapters and clauses:
Chapter 3 [3.1 Extruder series added specifications: add Table 2 basic parameters of linear low-density polyethylene (LLDPE) extruder, Table 3 basic parameters of high-density polyethylene (HDPE) extruder, Table 4 basic parameters of polyolefin (PP) extruder: original Table 2 changed to Table 5; Table 1 and Table 5 revised]; - Table 6 (add the inner hole limit deviation of the corresponding series of extruders); Table 7 (modify the clearance between the screw and the barrel: enlarge 0.03mm for the screw diameter of 20mm, reduce 0.01~0.03mm for the screw diameter of 120-200mm, and increase the clearance between the screw and the barrel of the corresponding series of extruders); -5.1 (incorporate ZBG95009.2-88 into this standard, and simplify the test method). This standard replaces ZBG95009.1-88 and ZBG95009.2-88 from the date of implementation. Appendix A of this standard is a prompt appendix.
This standard is proposed and managed by the National Rubber and Plastic Machinery Standardization Technical Committee Plastic Machinery Standardization Technical Committee. The drafting units of this standard are Dalian Rubber and Plastic Machinery Factory, Dalian Plastic Machinery Research Institute, Dalian Rubber and Plastic Machinery Factory Industrial Company, Shandong Plastic and Rubber Machinery Factory, Wuhan Plastic Machinery Factory, and Zhoushan Jinhai Screw Co., Ltd. The main drafters of this standard are Sun Yuan, Lin Changji, Zhou Jiahua, Yu Zhenhai, Yin Qiujuan, Wang Zhengming, and Hu Hua. 1 Scope
Machinery Industry Standard of the People's Republic of China
Single Screw Plastic Extruder
JB/T 8061—%
Replaces ZBG95009.1-88
ZB G95 009.288
This standard specifies the basic parameters, technical requirements, test methods and inspection rules, marking, packaging, transportation and storage of single screw plastic extruders.
This standard applies to single-screw plastic extruders (hereinafter referred to as extruders) for processing plastic products, and does not apply to special extruders. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference 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. GB19190 |
GB/T1338492
JB/Z28687
ZB G95 01088
3 Basic parameters
Packaging, storage and transportation pictorial symbols
Basic types and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding; shape and position tolerances; specified tolerances and matching dimensions without tolerances; hole and shaft tolerance zones and matching metal Vickers hardness test methods
Transport packaging, shipping and receiving marks
Straightness error detection
Determination of nitriding layer depth and metallographic structure inspection plate for steel parts
General technical conditions for packaging of electromechanical products
Process regulations for carbon dioxide gas shielded welding
General technical conditions for painting of rubber and plastic machinery 3.1 Series: screw diameter 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100, 120, 150, 200250, 300mm.
3.2 The basic parameters shall comply with the provisions of Tables 1 to 5. Table 1 is mainly for processing low-density polyethylene, Table 2 is mainly for processing linear low-density polyethylene, Table 3 is mainly for processing high-density polyethylene, Table 4 is mainly for processing polypropylene, and Table 5 is mainly for processing hard and soft polyvinyl chloride. 3.3 Among the basic parameters, the main assessment is the output, nominal specific power and specific flow that meet the quality requirements. 3.3.1 The assessment of the highest output in Tables 1 to 4 should not be lower than the highest output value listed in the table during the trial production and appraisal of the extruder; during batch production, the specific flow rate of the extruder at 60% of the maximum speed should not be less than the specified value. 3.3.2 When producing hard polyvinyl chloride (HPVC) in Table 5, when the screw speed is the minimum speed nm, the output should not be lower than the minimum value listed in the table; when producing soft polyvinyl chloride (SPVC), when the screw speed is twice the minimum speed, the output should not be lower than the minimum value listed in the table 3.3.3 The maximum screw speed nmax and motor power N in Tables 1 to 4, and the minimum screw speed nmin and motor power N in Table 5 are allowed to change appropriately (selection of motor specifications and other design reasons), but the nominal specific power N should not be greater than the specified value, the specific flow rate 9 should not be less than the corresponding value, and the output should not be lower than the listed value | |tt||Approved by the Ministry of Machinery Industry on September 3, 1996
Implemented on July 1, 1997
Screw diameter
Aspect ratio
Maximum screw speed
JB/T8061-96
Basic parameters of low-density polyethylene (LDPE) extruder Maximum output
Electric motor
Nominal specific power
kW/(kgh)
Specific flow
(kg/h）/(r/min）
Machine Cylinder heating
Number of heating sections
(recommended)
Barrel heating
Heating power
≤140
Center height
Screw diameter
Aspect ratio
JB/T8061-9
Processing linear low-density polyethylene
Maximum screw speed
Maximum output
Motor
(LLDPE) Basic parameters of extruder
Nominal specific power
kwt(（kgh)| |tt||Specific flow
(kg/h)/(r/min)
Barrel heating
Number of heating sections
(recommended)
Barrel heating
Heating power
Center height
Screw diameter
Aspect ratio
Maximum screw speed
JB/T8061-96
Basic parameters of high-density polyethylene
(HDPE) extruder
Maximum output
MI0.04-1.2
Motor
Nominal specific power
kwt(（kgh)
Specific flow
（kg/h）/（r/min）
Cylinder heating
Number of heating sections
（recommended）
Barrel heating
Heating power
Center height
Screw diameter
Aspect ratio
JB/T8061-96
Processing polypropylene
Maximum screw speed
Maximum output
Motor
Basic parameters of extruder
（PP）
Nominal specific power
kwt(（kgh)
Specific flow||t t||（kg/h）/（r/min）
Barrel heating
Number of heating sections
（recommended）
Barrel heating
Heat power
Center height
Screw speed
nmin~Nmax
JB/T8061-9
Basic parameters of polyvinyl chloride (HPVC, SPVC) extruder Output
Motor nominal specific power
kw/(kgh)
Specific flow
(kg/h）/（r/min）
（recommended）
Center height
4 Technical requirements
Screw speed
Nmin~Nmax
JB/T 8061-96
Table 5 (end)
Nominal specific power of motor
kW/(kgh)
Specific flow
(kg/h)
/(r/min)
(recommended)
The extruder shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.1 Technical requirements for main parts
4.1.1 Screw
4.1.1.1 Material
Use nitrided steel, other alloy structural steels and spray coating, cladding welding of wear-resistant alloys on the thread may also be used. 4.1.1.2 Surface treatment
≤100
≤125
Center height
Nitriding of nitrided steel , depth 0.3~0.6mm, screw outer circle hardness 740HV or more, brittleness not more than level 2. Other steels can also be plated with hard chrome and other technologies.
Note: The screw outer circle refers to the screw diameter in Table 1-Table 5. 4.1.1.3 Tolerance
a) The limit deviation of the screw outer circle shall comply with the provisions of h8 in GB1801. b) The straightness tolerance value of the screw full length shall comply with the provisions of 7-level accuracy in Appendix 1 of GB1184-80 4.1.1.4 The surface roughness R of the screw outer circle and the bottom diameter of the screw groove shall not exceed 0.8um, and the surface roughness R on both sides of the screw ridge shall not exceed 1.6um 4.1.2 Barrel
4.1.2.1 Material
Use nitrided steel, other alloy structural steel or inner hole with wear-resistant alloy bushing, etc. 4.1.2.2 Inner hole surface treatment
Nitriding steel is nitrided to a depth of 0.40.7mm, with a hardness of 940HV or more and a brittleness of not more than level 2. 4.1.2.3 Tolerance
JB/T8061-96
a) The limit deviation of the inner hole of the barrel shall comply with the provisions of Table 6. Table 6 Limit deviation of the inner hole of the barrel
Screw diameter
Screw diameter
b) The straightness tolerance value of the axis of the inner hole of the barrel shall comply with the provisions of the 7th level of accuracy in Appendix 1 of GB1184-80. 4.1.2.4 The surface roughness R of the inner hole of the barrel shall not exceed 1.6um. 4.2 Technical requirements for assembly
The clearance between the screw and the barrel should be uniform on the circumference, and its diameter clearance should comply with the provisions of Table 7. 4.2.1
Table 7 Screw and barrel diameter clearance
Screw diameter
Screw diameter
Minimum clearance
Note: If the diameter clearance is less than the minimum value, the cylinder size tolerance value shall not be greater than 50 specified in Table 6
4.2.2 When placed horizontally, the cylinder and the screw are allowed to contact in the barrel, but when running after adding lubricating oil, the screw and the cylinder shall not be stuck or scratched.
4.2.3 The pipeline valves of the cooling system should be well sealed, and tap water should be passed for testing for 5 minutes, and there should be no leakage. 4.2.4 The oil pump of the lubrication system should run smoothly, and each lubrication point must be fully supplied with oil without leakage. 4.3 Technical requirements for the whole machine
4.3.1 The structure of the extruder should be convenient for loading and unloading the screw, cleaning or replacement. 4.3.2 Parts exposed to the outside that are dangerous to personal safety, such as couplings, pulleys, barrel heating parts, etc., must be equipped with protective covers. 4.3.3 Within the designed speed range, the screw should be able to adjust the speed smoothly and steplessly. The heating system should heat the barrel to the process temperature within 2 hours. 4.3. 4
The temperature rise of the oil in the gear transmission box shall not exceed 35℃, and the temperature rise of the oil in other transmission boxes shall not exceed the relevant standards. The electrical equipment should meet the following safety protection requirements to ensure the safety of operators and production: 4.3.6
a) The insulation resistance of the short-circuited power circuit and the protective circuit wire shall not be less than 1MQ; b) The cold insulation resistance of the electric heater shall not be less than 1MQ: c) The grounding resistance between the protective wire terminal and any exposed parts of the circuit equipment shall not be greater than 0.12: d) The electric heating coil shall be subjected to a withstand voltage test. When the working voltage is 110V, the pressure shall be 1000V, when the working voltage is 220V, the pressure shall be 1500V, when the working voltage is 380V, the pressure shall be 2000V, the withstand voltage shall be 1min, the working current shall be 10mA, and there shall be no breakdown. 4.3.7 The noise (sound pressure level) of the whole machine shall not exceed 85dB (A). 4.4 Appearance quality
4.4.1 Each exposed welded part shall be flat and shall comply with the provisions of GB985 and JB/Z286. 4.4.2 Technical conditions for painting shall comply with the provisions of ZBG95010. 8
5 Test methods and inspection rules
5.1 Test methods
5.1.1 Sampling
JB/T 8061-9
All products shall be inspected when leaving the factory. During the type test, sampling inspection shall be carried out, and one unit shall be sampled each time. If one of the inspection items fails, another unit shall be sampled. If there are still items that fail, the type test shall be judged as unqualified. 5.1.2 Test conditions
5.1.2.1 Raw materials for testing
Select according to the range specified in Table 1 to Table 5, and record the resin name, formula, brand, product name, melt flow rate, etc. 5.1.2.2 Test equipment
a) Auxiliary equipment suitable for the extruder:
b) Special test head device.
The structure of the test head is shown in Figure 1, and the outlet diameter is in accordance with the provisions of Table 8. 1-High temperature melt pressure sensor: 2-Material temperature thermocouple: 3-Throttle valve: 4-Temperature control thermocouple Figure 1 Test head
Test head outlet diameter
Output Q
Test head outlet diameter dmm
5.1.2.3 Test instrument
Test instrument See Appendix A (Suggested Appendix). 5.1.2.4 Test methodbZxz.net
>50~150
>150-400
Under stable process conditions, mainly measure extrusion output, motor power, screw speed, plastic temperature and head pressure, etc. 5.1.3 Output detection
Under stable process conditions, when the plastic is extruded from the die, use a stopwatch to time it, extract the material once every 60s or longer, and do this three times in total. Weigh the weight with a scale, take the arithmetic mean, and convert it into hourly output. During the trial production and batch production of the extruder, the output and specific flow rate of LDPE, LLDPE, HDPE, and PP are measured at the highest speed and 60% of the highest speed respectively; the output is measured when the screw speed of HPVC is the lowest speed n; the output is measured when the screw speed of SPVC is twice the lowest speed. When testing with a test die, under stable process conditions and at a certain pressure, measure three times in a row and take the average value to determine the output. 5.1.4 Temperature detection
Use a thermocouple and a thermometer to measure the temperature of the plastic. 9
5.1.5 Die head pressure detection
JB/T8061-9
Use high temperature melt pressure sensor for detection. Calibration should be done before testing. The sensor should have good reproducibility. 5.1.6 Speed ​​detection
Use speed measuring device to measure the screw directly or indirectly. 5.1.7 Motor power detection
For DC motors, use DC voltmeter and DC ammeter to measure, and for AC variable speed motors, use three-phase power meter to measure, and calculate uniformly according to formula (1).
When using DC motors, the measured output power of the motor is: N=Un
Where: N
-Measured output power of the motor, kW:
U Motor input voltage, V:
I-Motor input current, A:
-Efficiency of the motor at high speed
Motor rated power
=Motor rated voltage × Motor rated current When using AC variable speed motors, the measured output power of the motor is calculated according to formula (2): N*x-Measured input power × n,
Where: II-Efficiency of the motor at high speed (subject to the technical data of the motor). 5.1.8 Nominal specific power detection
The nominal specific power is calculated according to formula (3):
N\=NIOmx
Wherein: N-
-nominal specific power, kW/(kg/h);
N Rated power of the motor, kW;
When Nactual is less than or equal to N, the measured maximum output, kg/h. 5.1.9 Specific flow detection
The specific flow is calculated according to formula (4):
qoactually measuredynactual
Wherein: q—specific flow, (kg/h)/(rmin): Qmeasured—measured output, kg/h;
nactually measured
measured speed, r/min.
5.1.10 Screw inspection
a) Surface treatment inspection: Nitrided steel uses furnace samples and tests the hardness, depth and brittleness of the nitrided layer according to GB4340 and GB11354. Other materials should also have corresponding samples for inspection: b) The surface roughness of the screw is measured by sample block comparison method, or a roughness meter is used for inspection: c) The outer diameter of the screw is inspected by an outer diameter micrometer; d) Screw outer circle straightness inspection: Place the screw on a platform and prevent it from rotating freely, then use a feeler gauge to measure the gap between the outer circle of the screw and the platform, or place the screw on a V-shaped iron on the platform, use a micrometer to measure the highest points of the screw ridges one by one, and then repeat the above process every 90° rotation to take the maximum value. 5.1.11 Barrel Inspection
a) Surface treatment inspection: According to 5.1.10a; b) The surface roughness of the barrel inner hole shall be inspected according to 5.1.10b); ) The inner diameter of the barrel shall be inspected within 200mm at both ends of the barrel using an inner diameter micrometer; d) The linearity of the axis of the barrel inner hole shall be inspected according to 5.4.2 or 5.6 of GB11336-89. 10
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