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How to Print (Coat) Engine Piston Graphite


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    Category: Application Fields

    Piston skirt coating technology scheme

    一. Detailed explanation of the piston part:

    Piston top: The piston top is an integral part of the combustion chamber, so it is often made into different shapes. The gasoline engine piston top adopts a flat top or a concave top to make the combustion chamber compact, the heat dissipation area is small, and the manufacturing process is simple;

    Piston head: The piston head is the part above the piston pin seat. Piston rings are installed on the piston head to prevent high temperature and high pressure gas from entering the crankcase and prevent oil from entering the combustion chamber; most of the heat absorbed by the piston top is also Passed to the cylinder through the piston head, and then passed away through the cooling medium;

    Piston skirt: All parts below the piston ring groove are called piston skirt. Its function is to guide the piston to reciprocate in the cylinder and to withstand side pressure. When the engine is working, the piston will be bent and deformed due to the action of the gas pressure in the cylinder. After the piston is heated, the amount of expansion of the piston pin is larger than that of other places due to the large amount of metal at the piston pin.

    Piston pin seat: used to install the piston pin to transmit the high temperature gas pressure to the connecting rod.

    二. Reason for piston coating;

    1. The skirt of the piston is tinned or galvanized, which can avoid the phenomenon of pulling the cylinder during operation under the condition of poor lubrication, and can also accelerate the running-in of the piston and the cylinder.

    2. Coating graphite on the skirt of the piston, the graphite coating can speed up the running-in process, make the skirt wear evenly, and avoid pulling the cylinder in the case of poor lubrication.

    1. Surface coating can improve piston durability by nearly 15%

    三. List of materials required for coating:

    1. High-precision curved screen printing machine
    2. Graphite paint
    3. Pairing the stencil
    4. Pairing tooling

    Maximum printing size 200*600mm
    Product length ≤300mm
    Use power 1.5KW/(220V)
    Power/Power 220V/1.5KW
    Printing pressure 4.0-6 kgf/c㎡


    四: Operating procedures

    Installation tooling:

    The tooling is inserted into the motor shaft, and the three locking screws are locked to prevent slippingThe piston is inserted into the tooling, the piston is stuck, and the piston cannot rotate left and right

    When printing the coating, it is driven by a servo motor to rotate.

    Install the stencil:

    The two grids on the equipment beam can be moved according to the size of the grid.Standard fine-tuning handle, the screen level can also be adjusted by the two sides of the screenAdjustment to ensure the accuracy of the coating position.


    Align position:

    See if the pattern and the piston skirt can be aligned through the stencil, and the pattern should be screen printed in the live

    on the skirt.

    Setting parameters:

    Adjust the starting point and ink return point according to the length of the pattern, according to the diameter of the product

    Small adjustment net spacing, that is, adjusting the height of the beam. Enter the product diameter,From the printing angle, click semi-automatic to start. Press the pedal to start.

    To paint:

    When applying paint, try to avoid the pattern part, try to pour it on the left hand side,

    When activated, the ink return knife will cover the paint.

    Printing coating:

    Adjusting the pressure of the printing knife can change the coating quality, the pattern and the

    There is white space around, the edges are clear, and the coating thickness is consistent.


    Drying treatment:

    Most of the piston coating drying is high temperature heating, conventional temperature

    250-300℃, drying for about 40-60 minutes to ensure that the coating is dry

    Dry thoroughly, and the adhesion is qualified.

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    ① We provide comprehensive one-stop services, customer training and satisfied after sales services.

    ② Online support, video technical support for troubleshooting manufacturing problems, engineers are available to service oversea as necessary.

    ③ Sold enjoy one year of free equipment warranty and lifetime technical support.


    Guarantee for Delivery

    Safety and fast logistic ensures the goods are delivered on the right time

    1. Packing: Plywood Case for Each Machine

    2. Payment terms: T/T (50% deposit to start the production, 50% paid before delivery)

    3. Delivery date:60 business days after received the payment.

    4. Departure of port: By sea from Shanghai or Ningbo

    5. Delivery means: By sea by land


    Screen printing was a technique first used by the Chinese almost 2000 years ago. It is widely used at home and abroad. Chinese printing machine market has already become the focal point of the world have opened up. We have teams of experienced technical experts and professionals providing most professional and just-in-time technical consults and services, timely supply of spare parts in place.


    If you are still confused how to start printing work, don't worry, contact us and we will help you out!! No mater you are a green hand, we will train you up-to-date technology skills, and keep an eye on your business opportunities. Our friendly and professional team that is able to handle all your inquiries whenever you need.

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