Mold pit setting: When the mold base size is less than 2020, mold pits need to be designed between A/B plates; All templates (including top needle plates) of the 2020 mold base need to be equipped with pry pits.

Guide column guide sleeve treatment: The guide column guide sleeve needs to be processed with an exhaust groove to prevent pulling during mold clamping.

Sharp corner chamfering treatment: Sharp corners are prohibited in non special areas of the mold and must be uniformly chamfered.

Design of exhaust on parting surface: Exhaust grooves should be set at parting surface, top needle hole or insert gap, with specifications referring to the mold design manual to prevent air bubbles and burning defects.

Demoulding mechanism design: The ejector pin, push plate and other demoulding systems need to evenly distribute the ejector force to avoid product deformation (such as the ejector pin spacing of large flat plates ≤ 50mm).

Cooling system layout: The diameter of the cooling water channel is 8-12mm, with a spacing of 3-5 times the diameter of the pipe and a distance of 10-15mm from the surface of the mold cavity to ensure uniform cooling. ‌

Surface processing requirements: Non adhesive surface processing patterns (such as wire cutting, spark patterns) need to be polished with oilstone, and the roughness of the adhesive surface should be executed according to the BOM table.

Welding restrictions: Without approval, internal molds and mold parts cannot be welded.

Polishing directionality: The polishing pattern of the cavity should be consistent with the demolding direction to reduce demolding resistance.

Part processing sequence: Prioritize processing formed parts that are prone to deformation or heat treatment sensitivity (such as cores and cavities), and then assemble other components based on the reference.

Installation of support legs: Exposed components such as oil cylinders and water nozzles need to be equipped with support legs and fixed to the mold frame with screws. Overlong support legs need to be tightened with external threads. ‌

Surface defect control: Scratches and sand holes are prohibited on the appearance of the mold, and the surface roughness Ra should be ≤ 1.6 μ m (high gloss surface should be ≤ Ra0.4 μ m).

Specification for nameplate identification: The nameplate content is complete, fixed near the reference angle of the mold foot, the character height is ≥ 5/6, and it is not easy to fall off.

Standardization of water nozzles: The cooling water nozzle is made of plastic block plug-in type, with a countersunk diameter of 25/30/35mm, consistent chamfer of the hole opening, and marked with the direction of entry and exit.

Biting process requirements: Use chemical corrosion (such as concentrated sulfuric acid) to treat the surface of steel, forming textures such as snake skin patterns/pear ground patterns. ‌

Mold frame strength verification: The thickness of the mold frame is designed based on the locking force of the injection molding machine, and the thickness of large mold templates needs to be verified through mechanical calculations.

Positioning system accuracy: The fitting tolerance of the guide column and guide sleeve is ≤ 0.02mm, and the conical positioning block ensures a clamping accuracy of ± 0.05mm.

Adaptability of the ejector hole: The size of the ejector hole should match the specifications of the injection molding machine, and it is prohibited to use only a single center ejector except for small molds.

Assembly tolerance of inserts: The clearance between the insert and the mold frame is ≤ 0.03mm, and the error of the inclined top and slider movement stroke is ≤ 0.1mm

Material Procurement Specification: Mold steel shall be purchased according to the technical requirements of the order, and material certification and heat treatment report shall be provided for hard molds.

Application of Pre hardened Steel: Pre hardened steel (such as P20, hardness HRC30-35) is preferred for general injection molds, eliminating the need for secondary heat treatment.

Heat treatment deformation control: High precision molds require deep cryogenic treatment (-80~-196 ℃) to eliminate residual austenite. ‌

Dimensional tolerance standard: Critical cavity/core dimensional tolerance ± 0.05mm (such as mobile phone shell molds), general parts ± 0.1mm.

Demolding force test: The demolding force is controlled between 50-200N, and the stability of the ejection is verified through mold testing.

Cooling efficiency verification: The cooling time accounts for 30% -50% of the molding cycle, the water flow rate is 1-2m/s, and the temperature difference is ≤ 5 ℃.

Regular maintenance plan: For every 100000 molds produced, a comprehensive inspection of vulnerable parts such as guide posts and top pins is required to repair worn parts. ‌

Requirements for hot runner system: The hot runner gate should avoid weld marks, and needle point gates should be preferred for transparent parts.

Lateral core pulling mechanism: The slider movement needs to be equipped with a limit device, with a stroke error of ≤ 0.1mm and a smooth lubrication channel.

Corrosion resistant treatment: Molds that come into contact with corrosive materials such as PVC should be chrome plated or made of corrosion-resistant steel such as S136.

Installation direction identification: The directional installation mold needs to be marked with a yellow "UP" arrow (50mm high) on the front/rear template.