Automotive mould design analysis

2020-08-15

1. The angle of the inclined plane of the slider is 2-3 degrees larger than the angle of the inclined guidepost;
2. The distance between the sliding block and the sealing surface of the front mould is greater than 1;
3. The insertion surface of the slider and the mould core must be made 3 degrees to avoid direct friction with the mould core;
4. The oblique side and bottom surface of the slide block need to be made of wear-resistant blocks, and fast moulds can be considered not to do;
5. The slider needs to add a spring (or a buckle, or a spring and a buckle together) and a limit device;
6. Know how to calculate the stroke of the lower slider;

1. The mating length of the inclined top link and the guide sleeve must be greater than 1/3 of the length of the link in the B plate;
2. It is better to use cup-head screws to connect the inclined top block and the link rod, which is convenient for processing; secondly, use pins; thirdly, it can be in the form of pressing blocks;
3. The hole between the connecting rod and the B plate avoids one side;
4. The head and tail of the link should be considered for positioning; the bottom plate should be made with craft holes for easy disassembly and assembly;
5. The angle of the inclined top ejector should be below 1 degree, not more than 1 degree;
6. Know how to calculate the ejection stroke of the up and downslope;
7. The simplest design of the inclined top seat is not required;

1. The mating length of the straight top link and the guide sleeve must be greater than 1/3 of the length of the link in the B plate;
2. It is better to fix the straight top block and the connecting rod with cup-head screws, which is convenient for processing; secondly, use pins; thirdly, it can be in the form of press blocks;
3. The edge of the screw hole on the top block is at least away from the sealing position;
4. The hole between the connecting rod and the B plate avoids one side.;
5. The head and tail of the link should be considered for positioning; the bottom plate should be made with craft holes for easy disassembly and assembly
6. The link can be directly fixed on the bottom needle plate;
7. The side of the straight top block needs to be inclined by 3 or degrees to avoid friction with the mould core during ejection;

1. According to the characteristics of the product: the depth of the column is below the needle, and the larger one is the tube, but it must be based on the actual situation;
2. Deeper bones need to be made of inserts for exhaust to avoid the dissatisfaction of the filling of air trapped bones during injection moulding;
3. A nozzle needle should be placed directly under the main runner, with an inverted buckle feature, to pull the runner out of the runner after the mould is opened;
4. According to the principle of product balance ejection, the thimble should be arranged reasonably, the diameter of the thimble should be as large as possible, and the processing of smaller thimble is more difficult;

1. After arranging thimble, inserting needle, inclined top, and nozzle, arrange the water transportation hole to avoid interference with these components;
2. Choose the diameter of the water transport hole according to the size of the mould, and control the distance between the good luck water holes and the distance between the water transport hole and the glue position;
3. It is best to make the water transportation holes vertical, and it is difficult to process oblique holes and spatial angle holes;
4. Try to connect the water-carrying holes in series inside the mould, not outside the mould;
5. It is best to stagger the horizontal direction of the water conveying holes in the front and rear moulds to facilitate the cooling effect.

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