What are the acceptance standards for dual color mold manufacturing?

Manufacturing a set of molds that can be called a towering one not only requires advanced mold design and precision machining techniques, but also requires a precise mold development concept. What is the concept of precision mold development? Many people do not think so, thinking that they have made so many molds, how can they not have a precise concept? In fact, molds are not about how much they are made, but rather whether your mold development pursues excellence in detail and reliable standards. This process does not allow the concept of 'similar' to exist.

一、 Mold appearance

1.The content of the mold nameplate is complete, the characters are clear, and the arrangement is neat.

2. The nameplate should be fixed on the mold foot near the template and reference angle. The nameplate is fixed reliably and not easy to peel off.

3. The cooling water nozzle should be made of plastic blocks inserted into the nozzle. If there are other requirements from the customer, they should be used according to the requirements.

4. The cooling water nozzle should not protrude from the surface of the mold base.

5. The cooling water nozzle needs to be processed with countersunk holes, with diameters of 25mm, 30mm, and 35mm. The chamfer of the orifice should be consistent.

6. The cooling water nozzle should have inlet and outlet markings.

7. The English characters and numbers marked should be greater than 5/6, located 10mm below the water nozzle, and the handwriting should be clear, beautiful, neat, and evenly spaced.

8. The mold accessories should not affect the lifting and storage of the mold. There are exposed oil cylinders, water nozzles, pre reset mechanisms, etc. below during installation, and there should be support leg protection.

9. The installation of the support legs should be fixed on the mold base with screws passing through the support legs, and excessively long support legs can be machined with external threaded columns and fastened on the mold base.

10. The size of the top hole of the mold should meet the specified requirements of the injection molding machine. Except for small molds, it cannot be pushed out with only one center.

11. The Setting circles shall be fixed reliably, with two ring diameters of 100mm and 250mm, and the Setting circles shall be 10-20mm higher than the bottom plate. Unless otherwise requested by the customer.

12. The overall dimensions of the mold should meet the requirements of the designated injection molding machine.

13. For molds with directional requirements for installation, an arrow should be used to indicate the installation direction on the front or rear template, with the word "UP" next to the arrow. The arrow and text should be yellow, with a height of 50 mm.

14. The surface of the mold base should be free of dents, rust, excess lifting rings, inlet and outlet water vapor, oil holes, and defects that affect the appearance.

15. The mold should be easy to lift and transport, and mold components should not be disassembled during lifting. The lifting ring should not interfere with the water nozzle, oil cylinder, pre reset rod, etc.

二、 Mold material and hardness

1. The mold base should be a standard mold base that meets the standards.

2. The materials used for the mold forming parts and pouring system (core, dynamic and fixed mold insert, movable insert, diversion cone, push rod, gate sleeve) shall be materials with properties higher than 40Cr.

When forming plastic that is prone to corrosion on the mold, the formed parts should be made of corrosion-resistant materials, or the formed surface should be taken with anti-corrosion measures.

4. The hardness of molded parts shall not be lower than 50HRC, or the hardness of Case-hardening treatment shall be higher than 600HV.

3、 Ejection, reset, core insertion and removal

1. The ejection should be smooth, without jamming or abnormal sound.

2. The surface of the inclined top should be polished, and the inclined top surface should be lower than the core surface.

3. The sliding components should be equipped with oil grooves, and the surface needs to be nitrided. After treatment, the surface hardness should be above HV700.

4. All top rods should have stop rotation positioning, and each top rod should be numbered.

5. The ejection distance should be limited by a limit block

6. The return spring should use standard parts, and both ends of the spring should not be polished or cut.

7. The slider and core pulling should have travel limits, and the small slider should be limited by springs. When the spring is inconvenient to install, wave screws can be used; The oil cylinder core extraction must have a stroke switch.

8. The slider core pulling generally adopts inclined guide pillars, and the angle of the inclined guide pillars should be 2 °~3 ° smaller than the angle of the slider locking surface. If the slider stroke is too long, it should be pulled out by oil cylinder.

9. When the end face of the core pulling forming part of the oil cylinder is covered, a self-locking mechanism should be added to the oil cylinder.

10. There should be a wear-resistant plate below the large slider with a width exceeding 150 mm. The wear-resistant plate material should be T8A, with a hardness of HRC50~55 after heat treatment. The wear-resistant plate should be 0.05~0.1 mm higher than the large surface, and an oil groove should be opened.

11. The top rod should not move up or down in series.

12. Add a barb to the top bar, and the direction of the barb should be consistent, making it easy to remove the barb from the product.

13. The fit clearance between the top rod hole and the top rod, the length of the sealing section, and the surface roughness of the top rod hole should comply with relevant enterprise standards.

14. The product should be easy for operators to remove.

15. When the product is ejected, it is easy to follow the inclined top, and grooves or corrosion marks should be added to the top rod.

16. The top block fixed on the top rod should be firm and reliable, and the non formed parts around should be processed with a slope of 3 ° to 5 °, and the lower periphery should be chamfered.

17. The oil passage holes on the mold base should be free of iron filings and debris.

18. The end face of the return rod is flat and free from spot welding. There is no gasket at the bottom of the embryo head, and spot welding is required.

19. The gate plate of the three plate mold slides smoothly and is easy to open.

20. The limit pull rod of the three plate mold should be arranged on both sides of the mold installation direction, or a pull plate should be added to the mold base to prevent interference between the limit pull rod and the operator.

21. The oil passage should be smooth, and the hydraulic ejection reset should be in place.

22. The exhaust port should be opened at the bottom of the guide sleeve.

23. There should be no gap in the installation of the positioning pin.