Injection mold for functional plastic parts, design reference for inclined top and lateral core-pulling mechanism

 1. Design reference for inclined top lateral core-pulling mechanism of injection mold:

1. Conventional form of lateral core mechanism: slider + inclined guide column, slider + hydraulic cylinder, inclined top block, inclined push block, inclined slider + spring, etc.

2. The length of the guide section of the ram is at least 2/3 of the length of the ram.

3. The ejection angle of the inclined roof should be designed within 6~12゜ as far as possible, and the minimum angle should not be less than 3゜.

4. When the product structure can only reach 20° when the product structure is limited, it is necessary to use a double-link inclined roof mechanism.

5. If the inclined ejector pin is purchased, the minimum Ф16MM is used, and the conventional use is Ф20MM. For large injection molds, the inclined ejector pin is preferably used Ф25MM.

6. It is necessary to design the auxiliary reference plane for the inclined jack head with the aid of the ejector rod.

7. The inclined jacking block and the inclined jacking rod are firstly fixed with double screw keys, followed by screws, and then positioning pins. The screws need to be attached with inclined positioning blocks.

8. The inclined top block should be R3.5MM within 15MM of the product, and R14.5MM below 15MM, which is convenient for processing and research.

9. The anti-rotation positioning structure needs to be designed for the inclined ejector rod. When designing, the inclined ejector can be assembled and disassembled without dismantling the mold.

10. Put a garbage nail on one side as far as possible under the inclined top seat.

11. The installation method of MISUMI slider seat is preferentially installed on the thimble bottom plate.

12. In the case of a waterway on the sloping roof, but the space is not enough, the garbage nail can be increased, but it can be larger than the conventional garbage nail design.

13. If a waterway is required on the top of the ejector rod, the ejector rod needs to be made of a double-layer waterproof ring.

14. When the core-pulling area of the inclined roof is greater than 200MM, the inner winding waterway of the double-rod inclined roof block is required.

15. When the delay state is required when the inclined jack is ejected, an auxiliary dThere are many styles, according to the characteristics of mobile phones, they are used more often, and the typical ones are as follows:

1. The appearance of the formed product, the large position of the rubber bag:

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A: When the rows are relatively wide, 2 inclined guide posts can be used.

B: When the row-position color glue is used as the exterior surface of the product, the row-position insert must have the forehead as shown above, so as to be locked with the front mold core to save clamping, but pay attention to the front mold screw holes to transport water.

C: Rubber-covered row inserts must be made of S136 material, quenched to HRC48~52.

D: All row shovels must be equipped with wear-resistant blocks, and row shovels with relatively large rubber bagging areas must be equipped with backhoes.

E: The center of the row position insert must coincide with the center of the row position seat. If they cannot coincide, the deviation must be larger, so as to avoid taking the wrong number of contact surfaces during spark discharge.

F: Row inserts, row seats, and shovel 3D parts must be typed to show the difference.

G: All rows must have limit screws to prevent the rows from jumping out and crushing the mold.

J: When the row position is relatively wide, 2 springs must be added.

2. The button position of the formed product is the same as the small row position of the rubber bag:

A: The small inserts in the rows must be aligned with the center of the buckle to avoid mistakes made by wire cutting and moulding.

B: Make a 3-degree slope on one side of the front section of the row insert.

C: The C corner of the row insert is inverted by 2.5MM, and the corresponding position of the mold core is matched by R2.2MM. If the width of the row insert is not enough, it can be reduced accordingly.

A: (a) suitable for sloped roofs whose width is less than 6MM, (b) suitable for larger sloped roofs whose width is greater than 6MM.

B: The thickness W of the inclined roof should be as thick as possible if the location permits, and the thickness should not be less than 3.5MM. When the front mold of the pool is pierced, it should be noted that the pierced surface should not be too small.

C: The width of the inclined top is generally determined by the width of the buckle, and its width should not be less than 3MM. Be careful not to be caught between the two bone positions, which will affect the injection molding.

D: All inclined roofs must have a (E) straight plane of 3-5MM for the discharge of the inclined roof, and (D) the hanging table is generally 0.8-2MM.

E: The standard specifications of the slanted roof are 12X12X45 and 14X14X45. The large slanted roof and the special slanted roof depend on the specific situation.

F: The 3D parts of the slanted roof and slanted roof seat must be marked with a code to show the difference, and the center of the slanted roof and the slanted roof seat should be consistent.

elay mechanism is required, but the angle of the auxiliary delay mechanism is 1~2 ゜ smaller than the product angle.