A Comprehensive Die Cast Mold Tooling Guide

Die casting mold

Die casting is an essential procedure for applications in different industries. A significant part of the die casting procedure is the die casting mold. The characteristics and shape of the mold impact the final commodity’s features. Thus, people must understand the die-casting mold structure. This would help them select and design the proper mold for their die casting projects.

Furthermore, they could be sure that the final commodity would fulfill special production needs. Therefore, this blog will provide a detailed outline of the various kinds of die casting tooling. People would also learn how to structure a mold by reading this blog.

Why is Mold Significant for Die Casting?

The structure of the die-cast mold plays a vital role in the shape of the component. Apart from that, it influences the configuration, uniformity, and quality of the parts from the die casting procedure. Wrong specifications could result in tool or substance corrosion. However, an appropriate mold structure could boost the efficiency and time of the product. Finally, the mold design’s quality would determine whether manufacturing will smoothly proceed and casting will be of excellent quality.

Furthermore, the die-cast mold structure significantly reflects the various factors that might occur during manufacturing. Therefore, people should analyze the structure of the casting during design. It is also vital to master filing settings, implement important procedure parameters and think about other economic impacts. This would guarantee that die casting could fulfill important manufacturing needs.

 Wholesale Die Casting Mold Parts

Comprehending the die-casting mold starts with the mold structure’s knowledge. The critical die casting mold parts to encompass:

Molding Systems

This encompasses the insert pins, sliders, inserts, core, and cavity. The die casting cavity decides the shape of the casting with the closure of the moving center.

Mold Base System

The die casting mold base system’s main parts are frames and steel plates. This system combines the mold’s various parts and permits the installation of the mold on the die casting equipment.

Ejection System

This system operates to eject components from the mold. These components encompass guiding, returned, and ejection components.

Runner System

The runner system links with the pressure chamber and the die casting component. Therefore, it leads the metal substance into the die cavity in a particular direction. This system directly influences the speed and pressure of the molten metal. The components of the runner system are an inner gate, sprue, and runner.

Overflow System

This system helps the pressure chamber get rid of air. Usually, the main parts are venting slots and overflow slots. Nevertheless, makers equip the deep cavities with vent plugs to enhance venting conditions.


Other wholesale die casting mold parts encompass positioning components to place components inside the mold correctly. Apart from that, there are bolts and pins for fastening purposes.

Kinds of Die-Casting Molds

There are many kinds of die-casting toolings. These toolings have various functions depending on the needs. They encompass:

Prototyping Dies

A significant outlay in die casting is a completely featured customized die. Thus, a prototyping die helps examine numerous casts for the various components. The prototyping tactics are three-dimensional printed parts, machined hog outs, and gravity casting. Nevertheless, these tactics involve trade-offs in design, tolerance, and properties. A high-pressure die casting prototype would be an excellent option for people to exercise when they require the same geometry, procedure, properties, and alloy for manufacturing. Prototyping dies can employ standardized parts and pre-hardened and uncovered tool steels. Thus, manufacturers can manufacture them in short times and at decreased costs.

Contrary to other manufacturing techniques, these molds also utilize less efficient cooling or ejection techniques. Thus, people should note that the instrument would not last long, and the die would not be as effective as manufacturing. Nevertheless, this would not be a difficulty if manufacturers needed a tiny amount of casting.

Rapid Tooling Dies

Rapid tooling refers to dies and inserts manufactured utilizing processes with shorter lead times than traditional methods. As opposed to heat treating and rough machining, the rapid tooling processes are laser-engineered net shaping, direct substance deposition, and selective laser sintering. Therefore, manufacturers can expect rapid tooling dies to develop much faster. They might utilize these dies either as production or prototyping dies. The most feasible choice would rely on the manufacturing volume requirements.

Production Dies

The production dies are the most common kinds of die casting dies. Production dies are necessary when manufacturers have finalized all the structures and are ready to launch it into an authentic commodity.

Manufacturers Can Have

  • Single cavity dies without slides
  • Multiple-cavity dies with many slide options

The cavity substance is high-quality steel. Manufacturers often retain it in a holder block. The structure of production dies guarantees that they have essential dimensions. Therefore, manufacturers could be sure that they permit the needed machine specifications.

Unit Dies

The unit dies a die casting mold’s unique type. A die caster unit holder ensures that the customer-owned cavity or unit dies are intact inside the cavity. Manufacturers can employ either double- or single-unit holders. Usual instances of magnitudes of cavity blocks held by the dies are fifteen × eighteen inches, twelve × fifteen inches, ten × twelve inches, and eight × ten inches.

Trim Dies

CMW utilizes trim dies for the manufacturing dies and high-volume manufacturing. The trim die immediately cuts off the overflow, runner and flash from the component to complete the casting. Some trim dies require hydraulic operated cam or motions, while others need close and open functions to efficiently remove the flash. Part geometry averts the capability to eradicate the flash by using a trim die fully. Thus, a customized trimming facility and hand deflashing strategies are great options in this scenario.

Mold Design Die Casting Procedure

This section will discuss manufacturers’ procedures for designing a mold for carrying high-pressure die casting. This procedure has five wide categories.

Preliminary Stage

Before mold designing, manufacturers need to check the manufacturability of the component with die casting technology. This stage involves assessing the product’s practicability from dimensional and geometrical views.

Dimensional view: There is a requirement to know the part’s dimension and the quantity of cavities needed for every casting. This would help know the volume and opening force of the casting. This data’s knowledge would make practicability studies a lot simpler.

Geometrical view: The geometry of the components encompasses making the parting line. The parting line does the division of the die casting mold into two, permitting ejection and simple mold opening of casting. Furthermore, the parts’ surface is dependent on their location from parting lines. Consequently, manufacturers have to design the surface in the mold opening’s direction.

The quotes’ geometric tolerance present in the two-dimensional model could be very difficult to manufacture because of the shrinkage caused by the cooling of metals. The greater the quantity of quotes, the tougher it is to get the same worth on the casting. Thus, manufacturers could go ahead with the design of the die-cast mold as soon as they confirm the manufacturability of the component.

Quantity of Cavities

To know the quantity of cavities, manufacturers should consider the quantity of parts to manufacture, hypothetical cycle time, and cavitation orientation. That way, they could decide the ideal option between a single-cavity or multi-cavity mold. When manufacturers go for a multiple cavity mold, they must keep in mind that apart from the ejection stages and complications of filling rises, the manufacturing process might be influenced by the product disposition and the dimension of the cavity.

Projection Area

The projection area is the surface attained from the cavities’ projection on the plan. It is vertical to the mold opening’s direction. The projection part is the design phase’s an important part. It builds a relationship between the die walls and the opening force released by the molten metal. Thus, the force’s strength would depend on the shape’s dimension orientation. A robust force would lead to the material’s overflow, thereby leading to the development of burrs. Thus, manufacturers must assess the forces manufactured by the molten metal to avert this casting defect. The force is a product of particular machine pressure, pre-set security factors, and projection areas. The factor provides a broader margin to help deal with the extreme pressure after filing. Several people call it a water hammer.

The equipment transfers the static and dynamic force at the procedure’s end. Therefore, there is the manufacturing of a pressure pick that the closing equipment force should absorb. This closing force is dependent on the press model and stroke dimension.

Shape and Volume of the Die

The die’s shape and volume are important for mold design. Apart from the desired volume, manufacturers must consider that the huge components would shrink because of a longer cooling time, adding to the shrinkage rate. Thus, manufacturers must size the mold cavities consequently.

Simulation by Semi-Empirical Modes

After the completion of the initial design stage, the upcoming phase is the imitation of die fasting utilizing semi-empirical modes. This replication helps calculate the filling of the mold. Moreover, the modality is dependent on the casted piece’s function and the filling procedure. For components with complicated structures, it is ideal for inducing mechanical resistance and compactness. In the meantime, for aesthetic components, the surface finishing has top-notch. The characteristics could be altered with the variation of the fill time. The quicker the filling, the higher the surface’s quality, whereas longer filling would affect more strength of the parts. Once the analysis is completed, it is simpler to note that there would be any casting issues.


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