JB/T 8538-1997 This standard specifies the technical requirements, test methods and inspection rules, marking, packaging, transportation and storage of screws and barrels for plastic machinery. This standard applies to screws and barrels for plastic machinery such as single-screw plastic extruders (hereinafter referred to as extruders) and plastic injection molding machines (hereinafter referred to as injection machines). JB/T 8538-1997 Screws and barrels for plastic machinery JB/T8538-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 8538-1997
Screw and barrel for plastic machinery
1997-04-15 Issued
Ministry of Machinery Industry of the People's Republic of China
1998-01-01 Implementation
J/T R5381997
This standard is proposed by the Technical Committee for Standardization of Plastic Machinery of the People's Republic of China and is under the jurisdiction of the Technical Committee for Standardization of Plastic Machinery. This standard is issued by Nanjing Technology Equipment Manufacturing Factory, and the units participating in this standard are not in accordance with the standard. Wuxi Zilan Machinery Co., Ltd. is responsible for the standardization of plastic screws! , Shanghai Machinery Factory Shandong Sail Rubber Machinery Factory This standard is drafted by: Erse, Liu Yangluo, Chaliang, Gu Juan, Wang Zhengming, Wang Hua, Xiang Youlong, Liu Xiaoling 1 Scope
Machinery Industry Standard of the People's Republic of China
Screws and barrels for plastic machinery
JN/T$538-1997
This standard specifies the technical requirements, test and inspection rules, marking, packaging, transportation and storage of screws and barrels for plastic machinery. This standard applies to screws and barrels for plastic machinery such as single-axis disc material processing machines (hereinafter referred to as expansion machines) and material injection or molding machines (hereinafter referred to as injection machines). bZxz.net
2 Referenced standards
The texts contained in the following standards are used in this standard to constitute the texts of this standard. The versions indicated are valid at the time of publication of this standard. All standards will be subject to revision. All parties using this standard should explore the possibility of using the latest version of the standard. GB19190
(/T1154-1996
GB4340-84
GB 4879-85
Gn38886
GB11336-&S
GB I1354 6S
tik F1S79 ES
GB/ S80
3 Technical requirements
Packing and transportation graphic mark
Shape and shape tolerance without tolerance value
Jintong Vickers method test
Rust-proof package
Transportation and delivery mark
Vertical load error detection
Steel defect rate single nitrogen layer depth determination and metallographic inspection tire Jinxia cover engineering electrical fast layer
Machine center product packaging applicable hanging conditions
3.」Pa material The machine must meet the requirements of this standard and be manufactured according to the approved technical documents in the prescribed procedures. 3.2 Materials and surface treatment
3.2.1 Screw
3.2.1.1 The material is generally nitrided, and other alloy structures and thread spraying wear-resistant alloys or chrome plating can also be used. 3.2.1.2 The surface of the screw made of nitrided steel is treated with hydride treatment: .-Extruder with a hydride layer depth of 0.3~.mm screw The outer diameter of the nitriding hardness is above 40HV: the cell is not greater than 2 levels:
-injection screw, the depth of the nitriding tool is not less than 0.3 and also: the outer diameter of the nitriding degree is above 7 [3.2.2 Machine
3.2.2.1 The sealing material is made of nitrided steel and can also be made of other alloy structures and the inner hole is nitrided or double-metallic. 3.2.22 The inner hole surface of the machine cylinder made of nitrided steel is nitrided, and the extruder is used for the machine. The hardness is 0.1--C.7mm; the inner surface hardness of the barrel is above 10IIV, and the hardness is not less than 2:
For the cylinder of the injection machine, the depth of the chloride layer is not less than e.3mm. The inner hole hardness of the cylinder is above 850HV, 3.3 Shape and position tolerance and surface clarity
Approved by the Ministry of Machinery Industry on April 15, 1997
Implemented in January 1998
JR/T8538-1997
3.3. 1 Thank you
3.3.1.1 The straightness of the axis of the rod (or the straightness of the axis of the rod) shall comply with the provisions of the B17 grade accuracy in the table B of GB/T1181--13%. 3.3.1.2 The coaxiality of the matching part (inner hole or) of the support to the reference system shall comply with the provisions of the R grade accuracy in the table B of Appendix B of GB/1184199.
3.3.1.3 The circular movement of the thrust bearing and the end of the matching part to the reference shall comply with the provisions of the table B18 grade tree seat in Appendix 13 of GB/T11841996.
The roughness and precision of the outer circle and the diameter of the screw shall not be changed. 3.3.1.4
.f 3.3.2.1 The straightness of the inner hole of the cylinder shall comply with the requirements of Table 1 of Appendix 3 of GB/T1184-1995. 3.3.2.2 The straightness of the inner or outer datum axis of the cylinder shall comply with the requirements of GB/T11B41996 Record E. 3.3.2.3 The movable degree of the datum axis of the cylinder positioning matching part (external end face or inner hole bottom) shall comply with the requirements of GB/T11B41996 Record B. 3.3.2.4 The surface roughness of the inner hole of the cylinder shall not exceed 1.6. No obvious magnetic damage, burn marks, locking, etc. are allowed on the outer surface and the inner surface of the cylinder. The two sides of the screw excavation must be smooth at the connection point. The side of the butterfly change is not allowed to be non-smooth. There are no non-smooth parts. 4 Test methods and inspection rules
4.1 Test methods
4.1. When the product is inspected at the factory, all the parts shall be inspected, and the type shall be inspected according to the sample. If the inspection item does not meet the requirements, the product shall be connected to the same item in the sequence. If it still does not fall off, the type test shall be judged as unqualified. 4.1.2 For the treatment of the surface of the nitrided fiber, the machine shall be tested or directly replaced by the rat in the morning shop, the deep inside and the chasing parts shall be tested for the toxic nitrogen. Its inspection method and delimitation shall comply with the provisions of GB4340 and GB11354. For other force-type surface treatment, the machine shall also have a known sample or straight press for calibration. The inspection of the surface treatment shall comply with the provisions of GB11379.
4.1.3 Form and position tolerance table can be inspected
4.1.3. The screw support is placed on a flat plate so that it cannot rotate by itself. Then, the distance between the outer circle of the screw and the flat plate is measured with a ruler. The larger the diameter, the more straight the error is. Or install the screw gauge between two items parallel to the flat root or support the rod with an equal total V-shaped agent placed on a flat plate. Ensure that the screw rod does not have axial motion (Figure 2). Install the measurement auxiliary on the screw rod. The indicator is measured along the west line of the vertical axis. Record the readings of the two indicators at their respective measuring points. Take half of the standard value of each point. That is, the maximum difference of (1/2) is taken as the straightness error of the axis. The measurement should not be less than one band. The maximum error value is the straightness error of the axis (or line).
JR/T 8538-1997
Screw straightness test
Figure 2 Screw straightness test plan
11.3.2 Axial alignment test of the mating parts (inner hole and outer hole) to the reference axis
Movement aid
Install the end rod between the two tops of the plate (Figure 3) or on the V-shaped material, and ensure that the screw has no axial movement (Figure 41. Soft movement The maximum difference is required for the radial runout of a single measuring circle. The radial runout of three or more surfaces is measured and the largest radial runout is taken as the same degree difference.
JB/T8538: 19%
Figure 3 Hecan Physical Inspection Tour
4.1.3.3 Frequency Protection Thrust Aid and Matching Parts Draw the Base Line for the National Follow-up Inspection Install the screw in parallel with the two sharp points of the flat H (read 5 or Place it on the rack to ensure that the screw does not have axial movement. The maximum value of the number of teeth of the screw rod after one rotation is the single measurement end face runout. Then measure the end face runout at a few points. The difference is used as the end face runout error of the product. 4.1.3.4 Linear inspection of the inner hole axis of the cylinder JBT8538-1997 Screw surface runout detection |tt||The straightness inspection method of the inner hole of the machine cylinder shall be in accordance with the provisions of 5.4 or 5. of GB11336. 1.3.5 Check the degree of the matching part (or foreign part) and the base line. Put the center of the machine into the inner hole of the machine and pressurize it. The maximum reading of the rotary machine cylinder indicator is the outer base line.
Figure 7 Coaxiality inspection of the machine cylinder
41.3.6 The machine is the end face of the end of the inner hole of the bottom of the inner hole of the three faces of the swimming axis of the group dynamic detection will be inserted into the inner hole of the machine or no question with the figure 8, the machine is the most effective value of the single period of the country and the circular runout environment is the method of the end of the amount of not less than the strict place, the maximum value of the machine is the machine surface runout error, Figure 6 machine whole surface runout detection
4.1.3.7 country period error should be inspected pool
coal loading surface twisting merchant internal gift pressure fast list empirical research and manufacture variable disk instrument design 4.2 inspection Lincai
mold support, machine manufacturer production certificate benefit brush manufacturing two see quantity inspection department inspection integration squeeze can be produced! Well with production injury pressure training certificate. 4.2.
each set of products should be inspected before delivery.
4 2.2 Type test
JB/T8538-1997
Each product shall be checked during the type test. 3.2.3.33.4. Inspection Type test should be carried out in one of the following situations: a) Trial design and identification of new products or old products transferred from the factory for production; b) After the formal production, when there are major changes in the structure, materials, and technology that may affect the performance; d) During normal production, at least one set shall be tested each year; d) After the product has been discontinued for a long time, the original production shall be resumed; d) When the inspection result is different from the last time; d) When the national quality supervision agency issues a single test requirement. 5. Marking, packaging, transportation and storage
5.1 Marking
On the surface of the tray and the machine sheet, there shall be clear marks, abbreviations, etc. 5.2 The packaging requirements of the machine sheet shall comply with the relevant provisions of T/T1334, and the complete documents in the box shall include product quality assurance:
Product transportation and sales shall comply with the relevant provisions of [5[91 and GB6388, S.4 Storage and disposal, machine cleaning and rust prevention requirements shall comply with the relevant regulations of 134879, and should be kept in a well-ventilated place and under the supervision of the merchant 6
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