【China Aluminum Industry Network】Aluminum alloy heat insulation profile is a compound profile with heat insulation function made of aluminum alloy profile and made of aluminum alloy profile and heat insulation material. Aluminium alloy heat insulation profiles are divided into two categories according to their composite methods. One type is an aluminum alloy heat insulation profile, that is, through the process of opening teeth, wearing strips, and rolling, the strip heat insulation material is put into aluminum alloy profiles. Wear the inside of the groove, and make it be a composite heat insulation section made of aluminum alloy. The other type is cast aluminum alloy heat insulation profiles, that is, the liquid heat insulation material is written into the aluminum alloy casting trough and solidified, and the temporary bridge in the aluminum alloy profile casting trough is cut to disconnect the metal and heat insulation. Materials Insulation profiles that connect two disconnected aluminum alloy sections.
Inspection of aluminum alloy heat insulation profiles is usually divided into three major parts, apart from inspection of aluminum alloy profiles, inspection of heat insulation materials and inspection of composite aluminum alloy heat insulation profiles. For the inspection of aluminum alloy profiles and heat insulation materials, see Chapter 2, Chapter 3, and Chapter 4. The inspection items of composite aluminum alloy heat insulation profiles include scale error, appearance quality, longitudinal shear test, transverse tensile test, torsion test, high temperature durable load test, and thermal cycle test, among which the scale error, appearance quality, and longitudinal shear Cutting experiments are items that must be inspected in each batch. Lateral tensile test, torsion resistance test, high temperature endurance load test, and thermal cycling test are periodic inspection items, that is, method inspections.
The inspection items and sampling rules for aluminum alloy heat insulation profiles are shown in Table 6-4-5.
Aluminum alloy heat insulation profiles commonly used functional inspection experimental equipment and equipment:
1 Special shear test machine for shear test;
2 (electronic) tensile (or hydraulic all-round) tester for tensile and shear experiments;
3 Test boxes for high temperature, low temperature shear, tensile and thermal cycling experiments (high and low temperature environments);
4 Test box for high temperature durable load test;
5 It is used for the special experimental fixtures such as shearing, transverse stretching and torsion test of heat insulation profiles.
Table 6-4-5 Aluminum alloy heat insulation profiles inspection items and sampling requirements
Test items
Checking nature
Sampling rules
Inspection of aluminum alloy profiles
Factory inspection
According to the rules of Chapter 2, Chapter 3
Thermal insulation inspection
Factory inspection
According to the rules of Table 6-4-4
Insulation profile appearance quality
Factory inspection
By root
Insulation profile dimension error
Factory inspection
L% per batch, not less than 10
Longitudinal shear test
Factory inspection
Each experiment should be taken in each batch of 2, each root in the middle and both ends of the cut five samples, and do the identification. The sample is divided into three equal parts (each part contains less than three middle samples), separately for low temperature, room temperature, high temperature experiments. The length of the sample is 100 mm±1 mm, and the length of the tensile test sample is allowed to be shortened to 18 mm
Lateral tensile test
Method check
Torsion test
Method check
High temperature durability test
Method check
Take 4 samples in each batch, cut 1 sample in the middle, and cut two samples in two separate parts to identify the sample. The sample is divided into two parts (each part contains less than two middle samples), separately for low temperature, high temperature tensile test. Sample length 100 mm±1 mm
Thermal cycling experiment
Method check
Take two each batch, each root cut 1 sample, cut two samples in two separate parts, the sample length 305 mm ± 1 mm
First, the scale inspection
Inspection of the dimensions of the thermal insulation profile includes examination of the dimensions of the aluminum alloy profile, inspection of the dimensions of the thermal insulation material and dimensional inspection of the composite thermal insulation profile. Inspection of aluminum alloy profiles and thermal material dimensional inspections are usually conducted before compounding. See Chapter 4, Section l, for dimensional inspection of insulation material. In the process of inspection of aluminum alloy profiles, in addition to the routine inspection of aluminum alloy profiles, inspections of the dimensions of the slot of the thermal insulation slot and the dimensions of the open profile of the threaded strip profile have been added.
1. Typical shapes, dimensions and inspections of casting troughs
The typical shape of casting trough is shown in Figure 6-4-3 and Figure 6-4-4, and the scales are shown in Table 6-4-6 and Table 6-4-7.
Table 6-4-6 Polyurethane casting trough typical scale map
Types of
A/mm
B/mm
C/mm
D/mm
E/mm
F/mm
Area/mm2
Volume/mm3
Length/m·kg-1
AA
BB
CC
DD
EE
5.18
6.35
6.35
7.92
9.53
6.86
7.14
7.92
8.89
9.53
2.79
4.06
4.78
5.49
5.74
1.O2
1.14
1.27
1.57
1.57
10.77
14.48
15.90
18.90
21.01
4.83
4.85
5.38
5.74
6.38
71.0
100.7
123.3
165.9
199.4
71000.0
100700.0
123300.0
165900.0
199400.0
12.25
8.64
7.05
5.24
4.36
Table 6-4-7 Typical dimensions of rigid polyurethane foam casting trough cross section
Types of
A/mm
B/mm
c/mm
D/mm
E/mm
Area/mm2
I
II
III
IV
V
9
9
9
9
9
twenty one
16
13
17
37
6
6
6
6
6
1
1.5
1.5
1.5
1.5
13
twenty two
37
25
16
273
352
418
425
592
When planning the casting trough, a suitable width/depth ratio should be adhered to, in order to improve the fluidity of the heat insulation material when writing in the trough, so as to facilitate better structural strength. The gap width ratio of the casting trough (surface area of the trough and the gap 2) should be less than 3.5. All internal angles in the casting trough should be rounded to prevent viscous fluids from forming a hazardous void in the pouring process. Four mechanical locking points should be planned inside the casting trough.
Insulation profiles are inspected prior to casting for gating troughs and samples are taken in accordance with Table 6-4-5.
2. Wear strip heat insulation slot
The typical dimensions of the slotted heat insulation slot are shown in Fig. 6—4—5. The dimension of the slot in the insulation slot is not in line with the demand and directly affects the shear resistance of the insulation profile. In the dimension of the insulation trough V1, the 2.90 mm dimension is more important. The strip-type heat-insulating profiles were inspected before the opening of the heat-insulating slot, and the sampling was performed according to Table 6-4-5.
