What Is Shell Molding?

Forming mold, that is, forming mold. A mold made according to the shape and structure of the real object and made into a certain shape by pressing or pouring. It is generally used for plastic processing.

Simple definition

A mold made according to the shape and structure of the real object and made into a certain shape by pressing or pouring. It is generally used for plastic processing. Press the pre-made plastic sheet around the periphery of the mold and heat it

1. Injection mold

Plastic first

1. Each set of molds can only produce plastic parts with a specific shape, size and accuracy. Therefore, when there are slight differences in production patterns, the molds must be changed instead of being replaced.

2. Due to the development of the market economy, the speed of new product launches is accelerating to meet the needs of market competition. Objectively, the production cycle of extrusion dies is getting shorter and shorter. The corresponding die design,

Due to the high technological content and high price of advanced processing equipment for extrusion molding dies, it is currently not widely used. At present, the manufacturing characteristics of extrusion dies in China are mainly as follows:

1. Since the extrusion die is mostly a single set production, there is no requirement for interchange. In manufacturing, the "actual matching method" is used more, that is, according to the size of a part, another part matching it is prepared, such as by hole. The same size to machine the shaft; or the "boring method", that is, two holes of the same size, such as the template and the die seat, can be fixed together and bored at the same time, you can guarantee the size,

1. Mold material: SKD11.

2. Tolerance requirements of mold forming: ± 0.1mm according to the mold drawing

3. Do you need to open a submerged mold? Generally, only one mold with four cavities can be used for this type of mold, but it must be determined according to the product.

4. For forming a double parallel mold, the front of the upper and lower molds must be evacuated to facilitate cycloid and operation, and to prevent the line from being pressed during the molding process.

5. Whether the U-shaped groove is needed or not depends on the actual mold.

6. Whether to open the ejection mold depends on the actual mold.

7, the number of holes in the mold.

8, line trench, net tail, LOGO should be open to facilitate replacement, to meet the needs of more products.

9. The mold should be nitrided to prevent the mold from rusting easily.

10. For molds such as MICROUSB, the pins must be copper sleeved to prevent scratching the iron shell of the plug.

11. The feeding point should not be too large, and there should be no bumps in the molding, so there is no need to repair the feeding point, which can save actual man-hours.

12. The latch should be movable, so that the exposed size of the iron shell of the plug can be adjusted to suit more products, such as DC plug molds. There is no need to move the surface like USB, because the exposed length is only one Species.

13. The SR mold should open and close the mold strip, which is convenient for cycloid and can improve the production efficiency, but pay attention to the mold can not be opened too thick, otherwise, if the molding SR distance is short, it can not be used.

14, such as DC plugs, round tube terminals, etc., the pin can not be too large, otherwise, it is easy to change its inner diameter too much, resulting in insufficient insertion force.

15. The newly opened mold must be retrieved by the copperworker at the same time, which will facilitate the maintenance of the mold in the future.

16. The opened mold must not have openings, scratches, burrs, too large clamping lines, misalignment, etc.

17.Do you need to open the double-sided feeding point at the feeding point to prevent punching during molding.

18. The size of the logo and the R angle may be according to the sample or the drawing.

19. The size of the SR card slot is very important. It cannot be opened too large or too small. If it is opened too much, the customer's product is too loose. If it is opened too small, it is difficult for the customer to install the product. ^[2]

20, the fixed needle opened by the mold itself should not be too small, in case of fear of being broken.