JBT standard content of the hottest plastic inject

2022-08-22
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Jb/t standard for plastic injection molding machine (content)

scope

plastic injection molding machine

1 Scope

this standard specifies the model, basic parameters, requirements, test methods, inspection rules, marking, packaging, transportation and storage of plastic injection molding machine

this standard is applicable to thermoplastic, single screw, single station, horizontal plastic injection molding machines (hereinafter referred to as injection molding machines)

normative references

plastic injection time reversal 2002 injection molding machine

2 normative references

the terms in the following documents become the terms of this standard through this standard reference. For dated references, All subsequent amendments (excluding Corrigendum) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition is applicable to this standard

gb/t 191 2000 Pictorial marking of packaging, storage and transportation (EQV ISO 780:1997)

gb/t 321 1980 priority number and priority number series

gb/t 3785 1983 sound level meter electricity Sound performance and test methods

gb/t 5226.1 1996 industrial machinery and electrical equipment Part 1: General technical conditions (EQV IEC: 1992)

gb/t 6388 1986 transportation packaging receipt and delivery mark

gb/t 12783 2000 rubber and plastic machinery product model compilation method

gb/t 13306 1991 label

gb/t 13384 1992 general technical conditions for mechanical and electrical product packaging

hg/t 3228 2001 general technical conditions for rubber and plastic mechanical painting (NEQ ISO 2813:1978)

3 model

the expression method is in accordance with the provisions of Table 2 in Chapter 5 plastic machinery product models of gb/t 12783 2000

note: for the products of technology introduction or foreign-funded enterprises, the original model is allowed to be used

4 basic parameters

4.1 specification parameters --- clamping force (KN)

it is recommended to select the specification parameter value according to the priority number R10 or R20 Series in gb/t 3211980

4.2

the theoretical injection volume, plasticizing capacity, injection rate, injection pressure and other four parameter values shall be in accordance with the provisions of the sales contract (agreement) or the product instructions

note: the theoretical injection volume calculated according to the design value shall not be greater than 105% of the parameter value.

4.3 the manufacturer shall provide the following parameter values to the user:

a) the effective spacing of the pull rod (horizontal and vertical)

b) the diameter of the mold positioning hole

c) the travel of the moving template

d) the maximum mold thickness (or the maximum template opening distance)

e) the minimum mold thickness

f) the motor power Heating power

jb/t 7267 2004

5 requirements

5.1 the injection molding machine should meet the requirements of this standard and be manufactured according to the drawings and technical documents approved by the specified procedures

5.2 technical requirements for the whole machine

5.2.1 the injection molding machine must have three operation control modes: manual, semi-automatic and automatic

5.2.2 safety must be fully ensured. The clamping parts shall be equipped with at least two of the three interlocking safety protection devices of mechanical, electrical and hydraulic. Large injection molding machines with clamping force of 1600kn and above shall also be equipped with safety pedals

5.2.3 the action of moving parts should be correct, stable and reliable. When the system oil pressure is 25% of its rated value, crawling and Jamming and obvious impact phenomenon (excluding mold adjustment)

5.2.4 the parallelism tolerance between the moving template and the mold mounting surface of the fixed template shall be in accordance with the provisions of Table 1

Table 1 mm

effective spacing of pull rods (max) when the clamping force is zero, the clamping force is the maximum

Table 1 mm

effective spacing of pull rods (max) Unqualified components cannot be installed into the system. When the mold force is zero, the mold closing force is the maximum 250 0.25 0.12> 250 ~ 400 0.30 0.15> 400 ~ 630 0.40 0.20> 630 ~ 1000 0.50 0.25> 1000 ~ 1600 0.60 0.30> 1600 0.80 0.40

5.2.5 the hydraulic system should meet the following requirements:

a) the working oil temperature should not exceed 60 ℃

b) under the rated working pressure, there should be no oil leakage, and the number of oil leakage places should be as specified in Table 2

Table 2

clamping force kn 2400> 2400 ~ 10000> 10000 ~ 25000> 25000 the number of oil leakage places is 1357 note: the oil leakage place has been cleaned, but the oil leakage reappears after 10min of operation of the injection molding machine, and the part with no more than three drops per minute

5.2.6 the electrical system should meet the following requirements:

A) the metal shell of the electrical device and the host should have a grounding device, and the grounding terminal should be located at the wiring position, And marked with protective grounding symbol or letter PE

b) the continuity of protective grounding circuit shall comply with the provisions of 20.2 in gb/t 5226.1 1996

C) the insulation resistance shall comply with the provisions of 20.3 in gb/t5226.1 1996

D) the withstand voltage test shall comply with the provisions of 20.4 in gb/t5226.1 1996

5.2.7 the noise of the whole machine shall comply with the provisions of Table 3

Table 3

clamping force kn 4500> 4500 ~ 16000>16000 ~ 25000 > 25000 noise value does not exceed

db (a) 82838485 the size of the investment scope can be

5.2.8 appearance requirements of the whole machine

5.2.8.1 the appearance of the whole machine should be neat and beautiful Color harmony

5.2.8.2 the painted surface shall comply with the provisions of 3.4.5 in hg/t 3228 2001

6 test method

6.1 detection of clamping force

6.1.1 detection conditions

a) the temperature of the tested pull rod and test block is room temperature

b) under the rated working pressure of the hydraulic system

6.1.2 detection method

the method of measuring the maximum strain of the pull rod with a strain gauge.The (it is also allowed to use a mold closing force tester with equivalent accuracy for detection)

6.1.2.1 install the test block at the center of the fixed formwork (see Figure 1). The material and size of the test block are as specified in Table 4

6.1.2.2 stick 101 concrete interface treatment agent on each pull rod as shown in Figure 1 and stick more than two sensitive strain gauges (even number)

6.1.2.3 to measure the strain of the pull rod (under the tight state of the mold closing mechanism)

6.1.2.4 calculate and determine the clamping force F (KN)

where:

fi para ī The axial force on the root pull rod, in kn

s, the cross-sectional area of the pull rod test, in

the elastic modulus of the pull rod material, in

I ī Strain of root pull rod

6.2 inspection of theoretical injection volume

inspection of theoretical injection volume is calculated according to the design value: vc= (/4) *d2ss

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