JB/T 8720-1998 Thermoplastic parts for tractors General technical parts
Some standard content:
1N 65.060.10
Machinery Industry Standard of the People's Republic of China
JB/T8720-1998
General Technical Conditions
Gencral specifications of
thermoplastic parts fur iracturs803-19 Issued
Ministry of Machinery Industry of the People's Republic of China
1998-07-01 Implementation
JB/T$T20
Appendix A and Appendix A of the Standard are the appendixes of the Standard. This standard is the addition of the standard, and the standard is proposed and submitted by the National Technical Committee for Standardization of Tractors! 1. The responsible drafting unit of the standard is the Ministry of Machinery Industry. The drafting unit of this standard is Shandong Tender Tractor! , Shandong Tanfang Tractor Factory, Shimeng tractor! The main companies in this industry are: Che Xiao, Xiabaozhong, Wanneng, Chen Jianhui, Shugao, Gongshangqun, Xiajigou. Scope
Machinery Industry Standard of the People's Republic of China
Thermoplastic Parts for Tractors
General Technical Conditions
Lieneral spcciPications of
Ihermoplestic parig for IracinrkIB/T8720-1998
This standard specifies the general technical requirements, test methods, control and inspection of tractor parts made of thermoplastic materials (hereinafter referred to as plastic parts). This standard is applicable to tractors made of thermoplastic materials, such as tractors, etc. Agricultural transport vehicles are made of hot-spotted materials. Clothing machines can also be operated with only parts.
2 Cited standards
The following standards are closely related to the standards cited in the whole standard and are the provisions of this standard: This version, new version, and all versions are valid. All international standards will be revised. The parties to the six standards should consider the possibility of using the latest version of the following standards. GB/T 104:-:
GB/T 1021-
GE/T J0-3-93
GH18436S
GI 2828--87
GB/T6a183
t:E96n&
G 54rll $5
GB54785
GE611285
GE/T 7141-02
G9E4I-RR
3 Technical requirements
3.1 Field profiling
Plastic tensile properties test method
Plastic compression test method
Hard plastic beam punchout test force method
Material bending load thermal deformation limit (normal thermal deformation limit) test method Single material total repair deep household test method||tt| |Deep batch inspection color meter draw out the procedure and draw out the table to track the use of the natural gas end test method
Plastic opening play drop test method
Plastic science impact market application chemical benefit test method
Complete science case dynamic wear test method
Thermoplastic materials and pipe fittings impact resistance performance determination method Plastic hot air maximum break test method
Complete material Bay Mountain bioenergy test method
31! Plastic parts have special table fees before the half-day replacement light (except for those who require hidden light), the light flesh service can also be pitting, scratches, flow marks, silver lines, edges, thorns, my light debris, obvious shadow account suction mark mark must be repaired and smoothed. 3.1.2 Plastic parts may retain traces, but the traces must be left on non-working surfaces and non-existing surfaces, and shall not affect the appearance of the product. 3.1.3 There are inserts on the wheel parts, and the key inserts must be combined with the molded parts to ensure the correct appearance of the parts, and shall not affect the appearance of the plastic. 3.1.4 The surface treatment (such as printing, film shaping, printing and cutting, etc.) of the plastic parts must be carried out on the surface. The body of the plastic parts should have sufficient cushioning force, and the surface must be smooth, without any defects such as hooks, punctures, pure blocks, waves, glue dots, edges, rain castings, titles, surging prints, and stagnation spraying. Surface printing machinery industry department approved on March 19, 1998
1998-07-01 real bottle
close the word speed, the pattern must be clear, ||tt ||JB/T8720-1998
31.5 The color of plastic parts shall meet the requirements of the drawings. If there is no requirement, black or other secondary colors shall be used to improve the aging performance of plastic parts. 3.2 The size of plastic parts shall meet the requirements of the drawings. The tolerance and accuracy level of plastic parts shall be in accordance with the appendix of the A standard and the B standard (see Appendix).
3.3 There shall be no shrinkage, bubble cracking, separation and other defects inside the plastic parts. The fusion bond shall be strong and shall not affect the performance in use. 4 Main technical performance
4.1 The chemical and mechanical properties of plastic parts shall meet the requirements of the drawings. The raw materials used for plastics shall meet the requirements of relevant national and chemical industry standards and drawings. 4.2 The tensile strength, shrinkage, bending, impact, sliding friction, heat resistance, cold resistance, etc. of the whole material under the production of 1 day can be recorded. The main performance of the whole material under the production of 1 day can be selected according to the auxiliary system standard. 5 Test methods
5.1 Deformation yield strength test method GB14 (maximum bending normal stress is 1.6MPa) 5.3 Plastic impact test method according to G5.70. 5.3 Anti-stop test method according to G5/T1C0 G/T1041. 5.4 Construction impact performance test method according to GB 1043 and GB1813. 5.5 Bending energy test according to B9341. 5,6 The impact energy test method of the wall material described above shall be carried out according to G612. 5. The performance test of the auxiliary grinding mill shall be carried out in accordance with GB G6C and GB 5.8 Long-term natural climate exposure test method GB36B. 3.9 High! The parts used under Article 4C shall be subjected to hot air military group test according to the method specified in GB/T41. 6 Inspection rules
6.1 Factory inspection
The parts shall be inspected and qualified by the inspection department of the manufacturer and shall be shipped only after the product name, type and name of the inspector are clearly marked in the inspection form.
6.2 Standard inspection
The products that have passed the batch production inspection shall be taken out of the machine through the 4-piece effect box), each piece (4 pieces are randomly selected according to the actual number of pieces) (if there are less than 4 pieces, they shall be inspected according to the actual number of pieces) 13 pieces are all qualified 6.3 The order price is determined by the manufacturer. The received products shall be sampled and tested according to the regulations. The sampling party shall determine the number of items to be sampled according to the actual situation. The plan can be agreed upon by the supply and demand parties. Marking, transportation and storage
.1 The materials should have the manufacturer's mark, which should be clear and obvious, and should not affect the quality. The effect of the installation is running, so that the points are ignited. 2. The installation is lifted! The transportation method of the box is to ensure that the whole material is not damaged or lost in the normal transportation. 7.3 In the dry, windy, and warm warehouse, please ensure that the production conditions of the plastic parts are .... 7.3 In the dry, windy, and warm warehouse, please ensure that the production conditions of the plastic parts are not damaged. 7.3 In the dry, windy, and warm warehouse, please ensure that the The size of the part that can be affected by the addition of the word "change" can be changed by the method of adding the word "change". Note: for the inner and outer parts of the country A demoulding slope change, plus the molding and other parts, and the meaning of the external sequence, the real tea parts, each meaning of the shape, note is the same as the "supplementary size", Figure A, demoulding slope, minus "change the nominal shape of the pregnant parts, plastics production data see Table A. Public category: JB/T:8720-1998 4: 3. 11 +G. 16 +0. 19+c.22 - 5. 31:±24 + 2±0+2
工025
=0.3±0.:7
-0.28 +4.32:-0,37
±0.38(92
-0 17 ±1. 53||tt ||u. 5:+ 3.54
±0.50;±.53=9.65
±n. 34 ±n. 69=n. 44 ±. 5±(. 57±G. 65 =2. 9+0
In.2Iu.44 1n.4su. st Io.sc +w.tr lc.?3 u. sr134
：For the single and dynamic evil division, the size of the whole room B is empty and careful mail division inquiry of the size of the US book =f. s0
JB/T8720—1998
~·225
0.80±0.±.56
0.5n±0.98
20 + 1 36
main 1.0F±1.15
: 4.1. 36
±1u±1.5
-·255
+19±2.15
±2 35 ±2. 5±2.1
-5.45+3.62
JIB/T: 8720—1998
Time Record B
(Appendix to the standard)
Selection table 1 of the common thermoplastic plastic parts, selection of practical thermoplastic tapes and tape parts, etc., selection of thermoplastic panels
ethylene-natural ethylene copolymer
Cool running male four materials
Polymer materials
Sensitive acidwww.bzxz.net
Armour
Pulp and meat culture
Ai Yixian
South China Fresh
Styrene
New without strong plasticizer)
Fuel male filling
Glass fiber filling medium
J30 uu
No specification required
and machine-filled pine cones
note the small size
high degree
general material degree
note the tolerance!
Good quality
Low maintenance
High performance
Polyamide
High quality
High density
Original
Full range of convex olefins
Laibaihai
Home Polymer Factory
First Service Institute
School of Formaldehyde
Carbon Dyeing Institute
JB/T8720-1998
Time Record
(Time Record of Investment)
Recommended Material Selection for Plastic Products
Recommended Material Table for Plastic Products
World Style Cylinder
5 -- 12
Pingqu Arc Lan Shen Zhen MPe
205--249
[1u--160
Humidity
Medium T
36.7-86.2
Can or think plus! 5% · ~%
"History fiber refers to the length"
Energy absorption and density, out of the same, so that the same moving people know high has low, anti-blood energy number self-thank the language can absorb juice full of a sense of ten electrical resistance. Can not be injection molded, use temperature high I-195 ~ +75c G?
Made at room temperature, with a small load and low temperature, the seat is hard and has good resistance to rubbing, the surface of the clothing can be smooth - the product introduces various types of reading and research
Light specific gravity, high shear resistance, good humidity performance, no absorption, can be injection molded
Wax resistance, low stress resistance, antioxidants are required, good tensile strength
High shear strength, resistance, good room temperature resistance
High impact resistance, good stability Strong change business, to the impact - market change, thank you for the use of the side, to, feel me, dangerous road water rate high - shadow heart people small heat stability || tt || suitable for labor and screw change, special low no symptoms of membrane connection system, firm service small size, molding time large || tt || unprecedented in the policy change, impact specification, no inch sense of stability shrimp, high index, small water absorption, but there are different directions and cracks || tt || cut into different combinations is "avoid the average calculation standard \, is the standard for the potential deformation humidity and mechanical properties of the resin plastic sales air delivery coefficient, time management as much as possible in the fine virtual high and high tension products 7
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