Inspection Equipment

Able to confirm the material quality (preliminarily ensuring the material properties) including material appearance, width, flatness, bending, and burrs before cutting the masterbatch.

Confirm the sample size after the slitting of the materials
Use the micrometer to confirm whether the thickness of the material meets the customer’s shipment standards
Use the vernier caliper to confirm whether the material width meets the customer’s shipment standards

Features：
1. Burr measurement
2. Product bending angle (inner R) measurement → Determine whether the mold design is appropriate
3. Size measurement

Causes of burrs → Poor mold clearance control, different ductility of materials, and different sharpness of molds
Burr measurement: We use 2.5D image measurement instrument

Causes of poor flatness (cause of waves) → Improper control of the rolling process (causing uneven stress)
Solution: Eliminate tension or stretch and straighten
After cutting, the thickness gauge will measure the height of the distance between the platform and the materials
International standard：Not exceeding 2mm/1 meter (i.e. distance between 1-meter sample and platform < 2mm)

nternational standards： Not exceeding 80mm/1 meter (i.e. the a of 1-meter sample < 80mm)

Use a thickness gauge to measure the distance between the material and the iron ruler
Causes of poor curvature → The material has wavy edges, and the thickness is uneven
nternational standards: Not exceeding 3mm/1 meter (i.e. gap h of 1-meter long sample < 3mm)

The higher the tensile strength (TS) → the better the test results of durability (service life).
∵ Fatigue strength is directly proportional to tensile strength.
The higher the yielding strength (YS) →The greater the normal force if the snap dome has a large downward pressing stroke and no yielding.
The higher the elastic coefficient (E) → The greater the normal force if the snap dome’s downward stroke is small and not yielding.
The higher the elongation (EL%) → The higher the height of draw extrusion.
The major reasons for the difference from the results of the tensile test:
A. The material size conforms to the international standards or not
B. The existence of burrs on test sample
C. The test sample is clamped firmly or not
D. The fracture position of the test sample is within the standard range or not

The size of the test sample is displayed in the figure
The thickness is less than 3mm based on ASTM E8 metal material tensile test method
Test 4 properties→Tensile strength (TS), yield strength (YS), elongation (EL), and elasticity coefficient (E)

The major reasons for the difference in hardness tests:
A.Flatness of the test sample itself
B.Appropriateness of the pressing load
C.Symmetry of cross symmetry line
Use the load test of 300g-500g for a test time of 10-15 seconds based on ASTM E3 microhardness (HV) test method

Able to understand the damage resistance of materials during forming
Place the sample in a W-shaped mold for W-shape (90 degrees), G/W and B/W bending tests
We can test the inner radius R of the mold: The minimum R = 0.05mm, the maximum R = 1.5mm
W-shaped bending stretches and deforms outward at the bended point. When being compared with the V-shaped bending test method, W-shaped bending is more stringent

R: Inner radius of the bended point
T: material thickness (mm)
Use the microscope to check whether there are cracks on the exterior side of the bended point
The smaller the (R/T) value, the better the bending formability

Smaller Ra → Longer service life of mold
→ Larger connector contact area, which could mitigate the temperature rise
To mitigate temperature rise, increase electrical conductivity, thermal conductivity, and contact area

We use X-ray fluorescent coating thickness measurement and material analyzer for non-destructive measurement of coating thickness and analysis of material composition.
Simultaneous measurement for up to 24 kinds of elements ranging from chlorine (17) to uranium (92).
Allowable tolerance range: ±5% for film thickness detection and ±5% for composition detection

Apply the principle of vortex testing to measure the conductivity of metal. The conductivity measurement unit is integrated as %IACS.
High conductivity is able to mitigate temperature rise and contact resistance.