Die-Casting Mold Management and Maintenance Specifications

Die-Casting Mold Management and Maintenance Specifications

1. Purpose:

Strengthen die‑casting mold management, ensure proper maintenance of die‑casting molds, guarantee smooth production and product quality, extend the service life of die‑casting molds, and reduce costs.

2. Scope of Application and Responsibilities:

All die-casting mold management and maintenance services provided by our company.

The die-casting workshop is responsible for the daily maintenance of molds.

Mold maintenance and repair personnel in the Process Department are responsible for mold upkeep and repairs.

3. Operating Procedure:

3.1 Die-casting molds must be neatly arranged in the designated area and at the specified location.

3.2 The maintenance, servicing, repair, and management of die-casting molds shall be entrusted to designated personnel.

3.3 Die Casting Mold Acceptance:

3.3.1 Upon completion of the new die‑casting mold, it shall be inspected and accepted by the die‑casting mold acceptance team in accordance with the “Technical Specifications for Die‑Casting Molds.” Only after passing acceptance may the mold be transferred to the workshop. The die‑casting mold administrator shall inventory mold components such as sprue bushes, ejector pins, and cores, affix appropriate labels, and store them separately by category.

3.3.2 When die‑casting molds are transferred out of or returned to the workshop due to production needs, the mold administrator shall ensure proper handover procedures are completed, and relevant personnel shall conduct thorough acceptance inspections.

3.4 Die-Casting Mold Records:

Upon successful acceptance of the die‑casting mold, a “Die‑Casting Mold Usage and Maintenance Record Book” must be established for periodic inspections and verification.

3.5 Die-casting mold inspection:

3.5.1 For die‑casting molds equipped with cooling water, use tap water to inspect the mold’s cooling water lines; they must be free of blockages and damage.

3.5.2 Inspect the die‑casting mold: sliders, ejector pins, guide posts, and other components shall operate smoothly, with no fractures or jamming.

3.5.3 Carefully inspect the die‑casting mold cavity and parting surface; the cavity and core must be free of dents and foreign material adhesion. The parting surface and venting grooves must be free of aluminum (or copper or zinc) slag and contaminants; any such residues must be thoroughly removed.

3.5.4 Inspect the die‑casting mold’s ejector pin plate and ejector pin fixing plate; all connections must be secure, and the threads in the pull‑rod holes on the ejector pin plate must be intact.

3.5.5 Inspect the die‑casting mold lifting ring screws for cracks; the connection between the lifting ring screws and the die‑casting mold must be secure.

3.5.6 When closing the die‑casting mold, ensure that the reset pins are flush with the parting surface and that the core inserts are fully seated.

3.6 Die-Casting Mold Maintenance and Care:

Die‑casting mold maintenance is divided into daily maintenance and periodic maintenance.

Routine maintenance primarily involves thoroughly cleaning aluminum slag and dirt from the mold’s exterior surface.

The requirements for periodic maintenance are as follows:

After the die‑casting mold is removed, the die‑casting operator must hoist it to a designated location for placement, where the mold maintenance technician will perform the following maintenance and upkeep procedures.

a) Clean aluminum (copper or zinc) chips and contaminants from the die‑casting mold, including the slides, cavities, cores, and venting system, ensuring the mold is clean and that venting remains unobstructed. After removing any adhered aluminum, proceed with grinding and polishing.

b) Wipe clean any oil or grease from the mold and the cooling water pipes.

c) Perform die‑casting mold inspection in accordance with 3.5.

d) Repair or replace core pins and ejector pins that exhibit bending, cracking, or breakage.

e) After approximately every 10,000 injection cycles, use a descaling agent to remove scale from the cooling channels of each die‑casting mold, ensuring unobstructed water flow.

f) For each die‑casting mold set, after approximately 30,000 cycles for zinc alloy and 20,000 cycles for aluminum alloy, the cavity surfaces shall be re‑ground and polished; if necessary, a new nitriding treatment shall be performed.

g) After every ten thousand mold cycles, the cavity of each die-casting mold must undergo internal stress relief treatment.

3.7 Die Casting Mold Maintenance:

For damaged die‑casting molds, once the repair plan has been approved by the relevant personnel, the mold maintenance team shall carry out the repairs promptly. Following repair, the mold must be inspected and certified as compliant before pressure testing can proceed. Only after the test‑produced parts pass dimensional inspection (or trial machining and assembly) may the mold be deemed operational and put into production, with all related records duly maintained.

3.8 Die Casting Mold Maintenance and Inspection:

Die‑casting mold maintenance personnel must conduct regular inspections of the molds, with checks performed once a month, and maintain detailed records. Additionally, when repairing or replacing core inserts during routine operations, corresponding records should also be kept.