Technical - AMK Auto Parts Co., Ltd

Production Process

Process flow chart of disc brake pad

Back Plate Surface Activity Treatment

Procedure parameters：

1. Compressed air pressure;

2. Feeding speed;

3. Nozzle and pad surface distance;

4. Time between activity treatment and bonding.

Quality check points：

1. The product surface dyne value;

2. Prcduct appearance: no dust, no impurities.

Curing

Procedure parameters：

1. Oven cure cycle ---- time vs. temp;

2. Amount of pads in the oven, pad position;

3. Temperature less than or equal to150℃.

Quality check points：

1. Green shear strength and binding area, green density, green compressibility and harness;

2. Appearance: no crack, bubble;

Press Forming

Procedure parameters：

1. Weight of mixture;

2. Hot-press pressure, temperature, degas cycle time and forming tine;

3. Homogeneity feeding.

Quality check points：

1. Product thickness, lining length;

2. Green shear strength and binding area, green density, green compressibility and hardness;

3. Underlayer homogeneity.

Back Plate Glue Coating

Procedure parameters：

1. Roller coating speed and belt speed control;

2. Glue concentration, glue storage life;

3. Store limite after coating, protective cover.

Quality check points：

1. Thickness;

2. Coated area, appearance.

Back Plate Shot Blasting

Procedure parameters：

1. Shot blasting time;

2. Shot blasting quantity;

3. Grit anount;

4. Grit size.

Quality check points：

1. Dimension, roughness;

2. Permanent marking: accurate, clear and complete, no deviation.

Back Plate Incoming

Procedure parameters：

1. Seal protection (waterproof, oil proof);

2. First in/first out principle.

Quality check points：

1. Dimension, smooth zone, flatness, material;

2. Permanent marking: accurate, clear and complete, no deviation:

3. Appearance: no deformation, rusting, dirt, covered, burr, or root crack of points.

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Process flow chart of drum brake shoe assmb

Bonding

Procedure parameters：

1 . After marking pad and brake shoe’s storage time.

2 . Bonding temperature, pressure of wind, rotation rate.

3 . Choose the appropriate steel band and fork.

Quality check points：

1 . Shear strength and bonding area of product, bonding position of pad and brake shoe;

2 . Appearance: the brake shoe polishing is golden yellow, shot blasting is bluish yellow, pad and brake shoe is closed bonding. No bliser, crack, peel offff, separation, deformtion, excessive glue, etc.

Marking

Procedure parameters：

1 . Storage time of pad;

2 . Belt speed, partial pressure;

3 . Drying temperature and time.

Quality check points：

1 . Appearance: no broken or edge, impurity loose, angulation, red leather, etc;

2 . Glue width, thickness, marking weight.

Slotting

Procedure parameters：

1.Belt speed;

2.Grinding wheel state (emery particle size， coverage face).

Quality check points：

1.Appearance: no broken or corner, cracks;

2.Width and dimension of products.

Brake shoe Incoming

Procedure parameters：

1.Sealed protect ion(waterproof， oil .proof).

2.First in / fifirst out principle.

Quality check points：

1.Dimension，euphotic zone， flflatness， material quality;

2.Permanent marking: accurate， clear and complete, no deviation;

3.Appearance: no deformation， rusting， dirt， covered, burr，or root crack of points.

Download flow chart