What is the integrity standard of industrial sewing machine?

Aug 05, 2021

First of all, we must know what a sewing machine is?

Sewing machine is used to sew clothes, furniture, shoes, hats, seat covers, etc. There are also many types . If they are classified according to their performance, they are divided into electric and ordinary sewing machines. The difference is that former are also called computer sewing machines, which have more motors than ordinary machines. It is more convenient and quicker, with much higher efficiency than ordinary ones, it can reduce labor costs, saving a lot of things for the boss of the clothing company.

So what is the integrity standard of an industrial sewing machine? How can we tell whether this machine is qualified? From the following point of view, the list is as follows:

Item	Check item	The allowable limit is not greater than（mm）	Inspection Method
1	Clearance between needle bar and upper and lower sleeve	0.10	The needle is in position, use a dial indicator to measure the edge of the sleeve
2	The needle bar is loose up and down	0.30	Measure the end face of the needle bar with a dial indicator
3	Loosen the pick line up and down	1.00	Needle position, thread take-up hole for dial indicator
4	Deflection of needle and needle plate	Not allowed	Visual inspection
5	Three-axis looseness	Not allowed	Visual inspection, feel
6	The feed dog is loose up and down	0.8	Dial indicator to measure feed dog
7	The feed dog is loose before and after	0.5	Feel or dial indicator
8	The hook swings forward and backward	0.8	Dial indicator to measure the tip of the hook
9	Loose fastening screws and defective parts	Not allowed	Hand feeling, visual inspection
10	Abnormal noise, abnormal vibration, heat generation of various parts	Not allowed	Hand feeling, visual inspection, ear hearing
11	oil protection device is incomplete	Not allowed	visual inspection

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