Technical indicators of various types of zippers

3# Invisible zipper

Combined width 4.15+0.03 Single width 2.65±0.03 Thickness 2.10±0.05mm

Electroplating pull head: mouth width 4.4mm mouth height 1.9mm

Painted slider: width 4.35mm, height 1.85mm

Ordinary belts are suitable for thick fabrics; lace belts are suitable for thin fabrics.

Ordinary top stop: Advantages: high output (adjustable speed); Disadvantages: top stop sometimes cannot pull the root

U-type top stop: Advantages: The top stop can be pulled to the root, suitable for clothing that requires it to be pulled to the root; Disadvantages: Low output, 4000 pieces/8 hours.

Factors that easily lead to defective 3# invisible zippers: large bend in the blade; the teeth are slightly scratched when sizing, causing the lower stop to be not welded in place, and the upper stop is also exposed, so that the upper stop is easy to fall off; the length of the zipper head is different; the zipper head is not secured after being painted.

3# Nylon zipper

Combined width 4.15±0.05 Single width 2.65±0.03 Thickness 2.00±0.05mm

Slider mouth height: 2.05-2.15 Slider mouth width: 4.2-4.25

Closed tail: There is no need to distinguish between high and low when determining the size, so it can be turned around sometimes; when the bottom stop is installed, the weft density of the cloth edge is sometimes loose and it is easy to cause thread pulling, which affects the appearance. It is best to use an up-and-down weaving method for the tape pattern within the width of the bottom stop, so that the bottom stop penetrates the tape and is not easy to pull thread; the top stop position must be guaranteed to be flush, the front lead is 2.2mm, the rear lead is 1.8mm, and the front and rear code leads of injection molding must be guaranteed to be 4.0mm.

Open tail: It is difficult to select the teeth with fixed size. Because the tooth pitch is relatively small (1.2mm), it is best to use fixed code installation. The right insert is high on the left and low on the right. Manual trimming is required. The ultrasonic half-tooth is pressed to the root. The shanks on both sides are evenly distributed, and the surface line is continuous. The punched cloth foot is about 8mm long. The pulling speed should not be too fast when pressing the square latch. The force on both sides is even and pulled in place. The pressing machine must work slowly, so that the mold is not easily damaged. The pressure is changed from high pressure to low pressure, and the mold is closed slowly. Then the high-pressure action pressure is changed from low pressure to high pressure, and high-pressure locking is performed. The difference between the two induction switches is about 20mm. Since the thickness of 3# nylon is thinner, the difference in the action of the induction switch is small, and the requirements for adjusting the position of the induction switch are high. Specific adjustment method: when the zipper is in neutral, the induction switch light is on, go to the higher part of the zipper tooth, the induction rod moves, the induction switch light goes out, the fishing needle is pressed down, hooks the hole of the patch tooth into place and flushes down.

Factors that easily lead to defective 3# nylon zippers: Due to the reasons of size assembly, the upper thread is easy to break when the size is determined, and the ultrasonic half-microphone is not pressed tightly, causing the tail to be pressed open and unable to be pulled into place.

Note: 3# nylon open tail needs to be accompanied by an open tail pull head. If the installation is normal, the upper stop can be injection molded.

5# Nylon zipper

Slider mouth height: 2.9-3.0 mouth width: 6.5-6.6 combined width: 6.45±0.05 single width: 4.15±0.05 thickness: 2.70±0.05

Normal open tail: The size and tooth selection should be adjusted at any time according to different codes (because the tooth pitch changes), ensure that the right insertion is higher on the left and lower on the right, and vice versa for the left insertion, the ultrasonic half-grain microphone is pressed to the root, the position of the tape should be flat, ensure that the pinhole of the pin block is punched to the bottom, the punched cloth foot is about 9.5mm long, ensure that the pin block is installed to the root, the pin punch is penetrated in the middle, the side of the block with the shank should be clamped firmly, and the punch is penetrated in the middle.

When repairing the folding mold, you must pay attention to the inclination of the lower mold, that is, if it is inserted on the right, the left is higher and the right is lower, and if it is inserted on the left, it is vice versa. In addition, a strong test must be carried out and production can only be carried out after it passes the test.

Factors that easily lead to defective products: due to the opening of the cloth foot being too short or too long, resulting in insufficient strength, the latch block cannot be installed to the root, causing the block head to be crooked and difficult to match, and the strength does not reach the standard value. The reason is that the punching is too biased to the outer side of the belt shank, and the punching is too deep, causing the belt shank to break.

Injection molding tail opening: fixed size and ultrasonic are the same as above. The mold needs to be changed to open. (Note: when changing the mold, pay attention to the starting position, because the mold stroke is different, otherwise the mold is easy to be damaged). For specific adjustment, a piece of paper can be put into the mold, and the hand wheel should be used to cut the paper just right. The punching foot is 9.5mm long. For the square block pin, please refer to 3# nylon tail opening press.

5# Nylon Double Open Tail

Fixed-size supersonic 5# nylon zipper, punched cloth foot length of about 13cm, ensure that the square pin is installed to the root, the four pinholes are centered and penetrated, the square must fall into place, otherwise defective products are likely to appear, the separate parts and the pull heads must be matched, in case of special pull heads, it is recommended to test whether they are matched before mass production, the solution when the punching needle is off-center or the separate parts are broken is to press the punching needle surface in different directions.

3# resin zipper

Slider mouth height 2.6-2.7MM, mouth width 4.75-4.85, combined width 4.55± 0.05, thickness 2.4±0.05

Closed tail: When pressing the upper and lower stops, the temperature, injection delay and holding time should be adjusted appropriately. If the size of the closed-tail zipper is about 15CM, when there is a certain quantity, you can use a mold with two upper stops. Similarly, if there is a suitable size and quantity, you can also use a mold with one.

Opening the tail: When determining the size, make sure that the leading edge is 4.5cm (17 micro-teeth), the pattern of the ultrasonic tape is clear, even on both sides, and the position is about 1.5mm away from the micro-teeth, to ensure that the punching hook can hook firmly and the thread is opened in one line.

Press adjustment: high pressure should not exceed 100kg/cm2, injection pressure 40kg/cm2, holding pressure 30kg/cm2, low pressure below 10kg/cm2, high pressure and holding pressure cooling time should be more than 0.1 seconds, which should be adjusted according to the actual product (zipper model).

Factors that easily lead to defective products: exposed legs (the reason is whether the upper and lower mold positioning pins are broken, whether they are appropriate) Pins fall off (whether the injection pressure is appropriate, whether the pressure holding and cooling time are sufficient) Square cloth seams shrink (the pressed zipper should be cooled before inserting the slider)

5# resin zipper

Slider mouth height 3.2-3.3MM, mouth width 6.05-6.15, combined width 5.75± 0.05, thickness 2.95±0.05

Closed tail: Please refer to 3# resin closed tail

Open tail: The fixed size ensures that the lead is 5cm (14 micrometer teeth), the fine tooth lead is 5.1cm (21 micrometer teeth), the pattern of the ultrasonic tape is clear and evenly distributed on both sides, and the position is about 2mm away from the micrometer teeth to ensure that the punching hook is firmly hooked and opened in one word

Double open tail: The position of the supersonic tape is about 2.5mm away from the Miter tooth. Other things are the same. If the resin zipper tape is pressed too deep and then pressed open, the root of the tape will easily break.

8# resin zipper

Slider mouth height 4.15-4.25MM, mouth width 8-8.1, combined width 7.4±0.05, thickness 3.9±0.05

Open tail: fixed size microphone with head 5.9-5.95 (14 microphone teeth), fine tooth with head 5.55-5.6cm (23 microphone teeth)

10# resin zipper

Slider mouth height 4.15-4.25MM, mouth width 8.9-9, combined width 8.2±0.05, thickness 3.95±0.05

Opening the tail: the fixed-size microphone head is 6.05-6.1 (12 microphone teeth). The pressure should be adjusted higher on the basis of 5#, and the time should be adjusted longer to ensure that the square plug is full and smooth.

3# Metal zipper

Slider mouth height 2.1-2.2MM, mouth width 4.55-4.65, combined width 4.45± 0.05, thickness 1.95±0.05

Closure: After sizing, the damaged mimic teeth must be removed, the upper and lower stops must be level and the shank must be wrapped tightly

Opening the tail: The patch should be about 1.8mm away from the miter to ensure that the punching hook can hook it firmly. The punched cloth foot should be about 8mm long to ensure that the pin block is installed to the root. The needle hole should be punched to the tape and centered.

5# Metal zipper

Slider mouth height 2.7-2.8MM, mouth width 6.0-6.05, combined width 5.90±0.05, thickness 2.6±0.05

Closure: Refer to 3# metal zipper

Opening the tail: After determining the size, remove the bad miter, and the patch should be about 1.8mm away from the miter tooth to ensure that the punching hook can hook it firmly. The length of the punched cloth foot should be about 8.5mm to ensure that the pin block is installed to the root, and the needle hole should be punched to the tape and centered.