Provincial-level New Industrial Product – Returnable Container Mold with Conformal Cooling Channels and Automatic Reset Anti-Collision Pure Mechanical Latch Mechanism

SINOMOULD – Provincial New Industrial Product: Crate Mould with Conformal Cooling and Automatic Reset Anti‑Collision Pure Mechanical Pull‑Hook Mechanism

In 2025, the Zhejiang Provincial Department of Economy and Information Technology (Zhejiang EITD) organised expert review and appraisal for provincial‑level new industrial products. SINOMOULD’s self‑developed “Crate Injection Mould” successfully passed the review and was recognised as a Zhejiang Provincial New Industrial Product. As the competent authority for the industrial and information technology sectors in Zhejiang Province, the “Provincial New Industrial Product” designation requires that the product demonstrates clear technological leadership in performance, structure, and process; possesses key core technologies and independent intellectual property; reaches a technological level of domestic leading or above; and that the average sales revenue after market launch is not less than RMB 6 million – with stringent evaluation standards and high recognition value. This is a concentrated reflection of SINOMOULD’s deep technical accumulation in the crate mould field.

Two Core Technologies Driving Dual Improvement in Molding Efficiency and Product Quality

Crate products have relatively thin walls and large projected areas, placing extremely high demands on the mould’s cooling system and the reliability of its moving mechanisms. This award‑winning product from SINOMOULD integrates two core technologies – metal 3D‑printed conformal cooling and an automatic reset anti‑collision pure mechanical pull‑hook mechanism – achieving systematic innovation at the mould design level.

Conventional crate mould cooling channels are limited by drilling processes to straight lines, resulting in uneven cavity temperature distribution, long cooling cycles, and products prone to warpage. SINOMOULD uses metal 3D printing technology to manufacture conformal cooling channels, allowing the cooling circuits to closely follow the cavity contour. Cavity surface temperature uniformity is significantly improved. For products with deep‑cavity structures, conformal cooling design can reduce cooling time by 50‑80%. For injection molding processes where cooling time accounts for a large proportion, this often brings over 30% efficiency improvement. Product defects such as shrinkage, warpage, and stress marks are significantly reduced, and the cavity surface temperature difference can be reduced from 19°C to 5°C. At the same time, the crate mould adopts a multi‑drop hot runner system, generating no waste after mould opening – directly eliminating runner cooling time and further improving production efficiency.

Crate moulds typically use a four‑slide structure. The slides are prone to damage under high‑speed reciprocating motion and heat, placing extremely high demands on slide material and cooling. SINOMOULD’s self‑developed automatic reset anti‑collision pure mechanical pull‑hook mechanism achieves automatic reset and anti‑collision protection of the slides and ejection system during mould opening and closing – without relying on pneumatic or electrical control – offering high reliability and low maintenance cost. This mechanism is particularly suitable for high‑speed, high‑volume crate production scenarios, effectively extending mould service life and reducing downtime for maintenance.

Delivering Low‑Cost, High‑Efficiency Production Advantages for Customers

In high‑volume crate production, cycle time, product yield, and mould life directly determine overall production costs. Through conformal cooling technology, SINOMOULD significantly shortens cooling time and improves product yield. Combined with the pure mechanical pull‑hook mechanism to extend mould life and reduce downtime, customers achieve lower per‑part production costs, higher output efficiency, and more stable product quality – gaining significant competitive advantages in production. SINOMOULD has deep technical expertise in the crate mould field and is the first Chinese company to produce 1‑out‑of‑4 stack‑mould crate moulds. This type of mould is suitable for high‑speed injection molding, with a cycle time of only 23 seconds – ranking at a globally leading level. To date, SINOMOULD has successfully designed and produced over 2,000 different types of crate and container moulds.

Precision Quality Control – Ensuring Long‑Cycle Stable Production

Provincial New Industrial Product designation requires that the product has reliable quality and good performance. SINOMOULD uses mould flow analysis software to simulate and verify cooling effectiveness, optimising the cooling circuit layout. Conformal cooling technology enables uniform mould temperature field distribution and consistent product shrinkage, with significantly reduced deformation and internal stress. The mould uses DIN 1.2311 high‑quality mould steel combined with beryllium copper inserts, providing excellent thermal conductivity and cooling effectiveness – effectively ensuring mould cycle time and service life.

Validity and Ongoing Compliance

According to the management requirements of the Zhejiang Provincial Department of Economy and Information Technology, the provincial new industrial product evaluation result is valid for three years from the date of publication. Recognised enterprises must report annual economic and social benefit indicators within the validity period and accept ongoing tracking evaluation. SINOMOULD will continue to follow up on the reporting requirements, ensuring that the product’s economic and social benefit indicator data remain complete and traceable.

This recognition as a Provincial New Industrial Product is a concentrated reflection of SINOMOULD’s core technology independent R&D capability in the crate mould field, and further consolidates the company’s leading position in the high‑volume injection mould market.