Test method of zipper load pull test machine

The zipper load test machine can be used under the action of horizontal and vertical tension to test whether it can withstand a specified number of reciprocating operations. During the test, the machine drives the zipper slider at a constant speed to perform 30 reciprocating motions per minute. Up to the specified number of times.

 

technical parameter:

 

1. Number of reciprocations: 30 times/minute

 

2. Reciprocating stroke: 75 mm

 

3. Fixture size: horizontal width 25 mm, vertical width 10 mm, pitch 1.5 mm, tooth tip width 0.2 m

 

4. The distance between the two clamping devices: 6.35 mm

 

5. Total weight of longitudinal clamping device: 0.28- 0.34 kg

 

6. Opening angle of test piece: 60°

 

7. The meshing angle of the test piece: 30°

 

8. Counter: 0-999,999

 

9. Power supply: AC220V, 50Hz, 80 W

 

10. Dimensions: 480×370×960 mm(L×W×H)

 

11. Weight: 60 kg

Test Methods:

 

(1) Top stop strong test

 

The zipper teeth are interlocked, and the slider is pulled to the upper end stop, and the pull head is pulled. At this time, the strength of the top stop of the zipper can be measured. This is a simulation of the zipper being held in the state, the slider crosses the top stop and pulls off. The ability of the top stop to resist external forces when moving from the ribs.

 

(2)Strength test of slider lock

 

The slider is self-locking in the middle of the connecting teeth. The zipper teeth are divided into left and right parts. Stretching the left and right parts of the zipper can test the locking strength and resistance of the internal components of the slider.

 

(3) Bottom stop strong zipper test

 

Pull the slider to the lower end, the teeth are divided into left and right parts. Pulling the sprocket on the left and right sides can measure the force required to break the bottom stop and measure the resistance of the internal components of the slider.

 

(4) Flat tensile test

 

The flat pull strength is the most basic strength index. It is used to test the ability of the zipper teeth to resist the lateral force in the interlocked state, which is very similar to the actual state of use.

 

(5) Test of the strength of the pull head and pull flap combination

 

Apply the pulling head force in the direction perpendicular to the pulling flap until the pulling flap is separated from the pulling body. The value recorded at this time is the combined strength of the pulling flap.

 

(6) Open tail flat tension test

 

Test the resistance of the open-end zipper insert tube and socket against external force damage. Fix the left and right sides of the open end with the upper and lower clamps. When the zipper is closed, start the machine.