Metal Casting Machinery Spin Casting Machine for Women Jewelry Zinc Heart-Shaped Keychain Production Equipement

Combining vacuum technology with high-speed centrifugal force, it is specifically designed for precision casting of zinc alloy jewelry. Whether you are producing minimalist metal-plated heart tags or intricate engraved/laser-cut designs, this machine ensures every heart pendant is dense, smooth, and razor-sharp in detail—making your products stand out on the shelf.

(A) Vacuum + Centrifugal Force: Double Assurance Against Porosity

Heart-shaped keychains are typically thin-walled with fine surface details. Conventional centrifugal casting often traps air during filling, resulting in pinholes and porosity—defects that become glaring "speckles" after electroplating, cheapening the entire product.

This machine features a high-efficiency vacuum system that evacuates air from the mould cavity before casting, combined with high-speed centrifugal force to drive molten zinc alloy into every corner. This dual-action ensures bubble-free, dense castings, providing a flawless foundation for electroplating or polishing.

(B) Silicone Mould Friendly—Extends Mould Life

Heart keychains are typically cast using silicone rubber moulds, and mould durability directly impacts production costs. The vacuum system minimizes oxidation and thermal shock during casting, extending silicone mould service life by at least 50%. This translates to fewer mould changes, lower tooling costs, and higher margins.

(C) Semi-Automatic Design—Efficiency Meets Control

• Automatic Cover Open/Close: Saves time and labor, ideal for long-hour continuous operation with reduced worker fatigue.

• Digital Display & Timer: Features digital speed display and a digital timer for precise centrifugal time and speed settings (50–1400 RPM adjustable), ensuring consistent process parameters across every batch.

• Variable Frequency Drive: Allows flexible speed adjustment based on keychain size, weight, and wall thickness—one machine, multiple applications.

• Dual Safety Protection: Equipped with electronic emergency brake and safety guards to protect operators.

This machine is widely used for centrifugal casting of zinc alloy, tin-lead alloy, and other materials for jewelry and craft items. Typical products include:

Heart-shaped keychain pendants (plain, engraved, hollow-out designs)

Fashion accessories, bag hardware, buckles