Multi-slide Die Casting: The Ultimate FAQ Guide

I know you’re looking for more information about multi-slide die casting.

A reason this guide will answer all your questions about multi-slide die casting – from definition, benefits, limitations, casting process to surface finishing options.

So, if you want to learn more about multi-slide die casting, read this guide.

What Is A Multi-slide Die Casting?

This is a type of casting that utilizes more than three slides that are perpendicular to each other.

Multi-slide die casting allows for accurate casting and facilitates complex casting processes.

 Multi Slide Die Casting Mold

Multi-Die Casting Mold

What Are The Benefits Of Using A Multi-slide Die Casting?

Investing in a multi-slide casting offers several benefits including:

  • Lower production cost

Multi-slide casting uses more than three slides at a go.

This facilitates the accurate casting process of complex designs.

The advantage of this is it reduces the overall cost such as the cost of purchasing different casting machines.

You also save in terms of operational cost since one machine handles all the casting processes.

  • Consistent quality production

The arrangement of the dies allows for accurate casting and uniformity in the products.

This enhances the quality of your products while enhancing production efficiency.

  • Component durability

The product you produce through multi-slide die casting are highly durable and have an enhanced visual appearance.

This is due to the production process of using quality metal material.

Multi Slide Die Casting Ensures Consistency During production

Multi-Slide Die Casting Ensures Consistency During Production

What Are The Parts Of A Multi-slide Die Casting Machine?

A functioning multi-slide casting machine should consist of the following parts:

  • Die block

The die block is what gives the mold of your multi-slide die casting machine its shape.

This needs to be of a material that has a higher melting and boiling point than the metal you are casting.

  • Slides

Slides are what shape your metal component.

The number of slides on a machine depends on the type of machine and the way you arrange them.

  • Cover plates

Cover plates prevent the metal element from spilling out during the casting process.

They are usually part of the die but you have to place them on top of your die.

Parts of A Multi Slide Die Casting Machine

Parts Of A Multi-Slide Die Casting Machine

What Are The Drawbacks Of Using A Multi-slide Die Casting?

The major drawbacks to the use of a multi-slide die casting are:

  • Size component limitation

A multi-slide die casting is an ideal option for the production of small components.

This means you have to look for another machine to produce large parts.

This can have the effect of increasing production costs.

  • Porosity

Multi-slide die casting is subject to porosity when you don’t check on the operating parameters.

Porosity weakens the structure of the components thereby reducing its life cycle.

  • High die cost

Fabrication of a multi-slide die is expensive due to the specifications required.

You therefore need proper financial budgeting before deciding on the use of the machine.

Which Materials Can You Use On A Multi-slide Die Casting?

The main materials available for use on a multi-side casting machine are zinc.

Aluminum, copper, magnesium, and lead.

You can also use an alloy of these metals on the multi-slide die castings.

What Is A Die Parting Line in A Multi-slide Die Casting?

This refers to the point where the two different sides of your mold meet.

It is at this point that you have to install the clamps.

It is also along the parting line that one can view the inner and outer parts of your casting.

An Illustration Of A parting Line

Illustration Of A Die Parting Line

How Does A Multi-slide Die Casting Work?

A multi-slide die casting works like conventional casting.

However, the difference is in the number of slides that a particular multi-slide die casting has.

The main steps in the functioning of a multi-slide die casting are:


Preparation is the process of ensuring all the parts of your machines are in proper condition and working accordingly.

This includes preparing the die by heating it to a particular temperature.

You also have to spray the die with a refractory lubricant or coat.

The purpose of this is to ensure the die retains its temperature during the fabrication process.

Temperature retention also reduces early solidification while facilitating cast removal.

It is important to clamp the die halves tightly.

This is to prevent leakages during the casting process.

A Multi Slide Die Casting Machine

A  Multi-Slide Die Casting Machine

Melting Metals

The melting process can take place within the multi-slide die casting machine or in a separate one.

This process facilitates the casting process by ensuring the metal is in the correct state.

Melting temperature varies depending on the type of metal you are using.


After melting the metal, you have to inject it into the die through a downward sprue.

This process can be automatic or manual depending on the type of machine.

There is no need of exerting pressure in this process since gravity force is enough to force the molten metal.

This is done by inserting the molten metal in a vertical direction and allowing it to flow through the die.

The advantage of using gravity is it reduces turbulences which helps in preventing porosity.

You therefore should expect a smooth surface on your parts and components.


After casting, the molten metal has to cool for solidification purposes.

The cooling process should be in a way that the mold forms as per the specifications.

You need to avoid rapid cooling since it will interfere with the integrity of your product.

You don’t have to de-clamp your die at this stage.

This facilitates the component formation without affecting its structure.


This is the point where you have to de-clamp your die.

However, you should ensure there is sufficient cooling of the mold.

De-clamping depends on the type of machine.

You can either use your hands or clamping tools.

You then have to remove the component from the die.

This is either by using an ejector pin or related tools.

Such tools allow for the safe removal of the part from the die.


Trimming allows you to get the right component as per your dimensions.

This is done by removing unwanted parts and materials.

You can achieve this by using different tools such as files and trimmers.

After trimming, the part is ready for packaging and shipping.

Is There A Difference Between A Hot Slide Multi-slide Die Casting And A Cold Slide Multi-slide Die Casting Machine?

Yes. There is a difference between hot slide casting and cold slide casting.

Hot slide die casting involves heating the metal material within a casting machine.

A cold slide dies casting machine involves heating your metal material in a separate furnace before transferring it to the casting machine.

Hot Slide Die Casting Machine

Hot Slide Die Casting Machine

Hot slide die casting is relatively cheaper compared to cold die slide casting.

This is due to the purchasing of another machine to heat your metal material.

You also have to factor space for the installation of the heating machine in a cold slide die casting.

A cold slide die casting is ideal for melting metals that require a higher melting temperature.

You can use hot slide die casting for metals and alloys with a lower melting point.

What Are The Common Problems You Can Expect In Multi-slide Die Casting?

Problems you may experience when using multi-slide die casting are:

Trace Metal Flow And Casting Surface Pattern

The main cause of this problem is having a shallow casting inlet port.

It can also be due to the application of high pressure on the molten metal.

You can solve this problem by ensuring you design deeper inlet ports.

You also need to apply the correct pressure on the molten metal during the injection process.

Small Convex Tumor On The Casting Surface

You are likely to experience this issue when you have a rough surface.

It can also be due to scratches and cracks on the cavity surface.

The solution to this involves repairing the cavity present on your mold.

You also need to ensure you polish your mold often.

Push Rod Impressions On The Casting Surface

The cause of this problem is using a long push rod or having s cavity surface that is rough.

You can solve this problem by ensuring you use a push rod of the required length.

You also need to polish your mold often.

Also, remove pollutants and debris present on the mold’s surface.

Cracks In The Casting Surface

The cause of having cracks on the casting surface is using uneven rod distribution.

It can also be due to having a side force that is small.

Having a casting wall that is thin can also cause the cracks on the casting surface.

The solution to this involves increasing the lifter pole number and adjusting the distribution point.

You also have to adjust and reinstall your pushrod.

Pores On The Die Casting Surfaced

The presence of pores on the die casting surface is due to much lubrication or blocking the vents.

Always ensure you regularized the lubrication and repair all the vents present.

Shrinkage Cavity On The Casting Surface

The cause of this problem is using an unreasonable die casting method or having uneven wall thickness.

It can also arise from having a high molten metal temperature.

The solution to this problem involves regularization of the temperature and ensuring there is uniformity in wall thickness.

What Should You Consider In Die Design For Your Multi-slide Die Casting?

You have to consider the following when designing your multi-slide die casting:

Wall Thickness

It is important that you consider maintaining the wall thickness of your die.

Wall thickness enhances the porosity of your die while allowing for maximum cooling of the mold.

Thickness also ensures there is constant heat checking of the die.

This facilitates quality production.

Sharp Edges

Minimize having sharp edges on your die design.

Such edges cause stress risers around the die resulting in premature cracking and failure of the die.

Sharp edges have the effect of reducing the ability of your metal to fill the die cavity.

You need to connect the bosses and intersecting walls using ribs that have a generous radius.

Such connection enhances the molten metal flow while increasing the strength of the component.

Ejector Pins

Ejector pins are essential aspects of your die design.

Their function is to push the metal casting evenly from the die.

It is vital that you consider a pivotal location for placing these pins.

You also have to space the pins evenly to ensure uniform ejection of the casting.

You need to install the ejector pins on the rubs or bosses of the component.

The position of the ejector pins should be in direct proportion to the thickness of the die walls.

This is to prevent the ejector pins from pushing through the metal casting in case the die has thin walls.

Final Machining

Final casting is always rough and requires final machining.

This ensures you have a smooth component and one which fits the dimensions.

However, too much machining results in a defective component.

You can minimize machining by ensuring you design your dies in a way that incorporates the necessary dimensions.

Parting Lines.

Parting lines are the point of intersection between the ejector cavity and cover.

When designing your die, you need to ensure there is the correct placement of the parting lines.

Parting lines helps in reducing the cost of casting.

How Much Is A Multi-slide Die Casting?

You have to factor in the following factors when determining the cost of a multi-slide die casting:

Type Of Die

The different die types available for use in multi-slide die casting affect the final price of the process.

The dies differ in terms of their shapes, size, and type of material.

Materials for the die vary depending on the metal alloy that you want to use for your product.

An ideal material is one that can withstand the temperature of the metal for your product during the casting process.

Thickness Of Your Product

The thickness of your products determines how long and the material you require for the casting process.

The thicker your product the more metal material you require which increases the overall price.

You cannot compromise on the thickness of your product since it can affect its tolerance and stability.

This means the thicker you’re your product, the higher price for your multi-slide die casting.

Complexity Of Your Product

Products vary in terms of dimensions and type of metal alloy to use. The cost of the metal alloy usually impacts the final price of your multi-slide die casting.

It is critical therefore that you specify the dimensions and the material you want to use fo you to get the exact price.

Type Of Metal

The different metals and alloys you require for your casting have a bearing on the final pricing of your multi-slide die casting.

This is because the different metals and alloys have different chemical and physical properties

The choice of which metal to use depends on several factors like the application you want to use your product.

It is important to specify which material to use for you to get the right price.

Number Of Slides In A Multi-slide Die Casting Machine

The higher the number of slides you want for your multi-slide dies casting machine, the higher the purchasing cost.

A number of slides indicate the complexity of the components that a particular machine can produce.

DO I require A Surface Finish For A Multi-slide Die Casting?

Yes. You need a surface finish for your multi-die casting.

The main surface finish available for your multi-die casting are; Sand casting, painting, engraving, and NOBAKE.

Can You Re-use A Die In A Multi-slide Die Casting?

Yes. It is possible to re-use a die in a multi-die casting.

However, before using the die, you have to ensure the die is in the correct condition.

This helps in producing quality products.

A particular die can only mold the same product.

It is therefore important that you re-use a die if you are producing the same product.

The products should have the same specifications in terms of length, thickness, and size.

It is advisable that you change your diet once after several re-uses.

This ensures that you maintain the quality of your product.

What Is The Process Of Surface Finishing Your Multi-Slide Die Casting?

The process of surface finishing your multi-slide die casting involves the use of one of the following methods:

Sand Casting

This is the common type of surface finish in multi-slide die casting.

This is due to its friendly cost and ease of application.

The process involves heating the material until melting point and pouring it in a mold for cooling and solidification.

The advantage of this method is it allows for complex designs.


The use of chemical binders is common in this type of surface finish.

The binders bond the molding sand before adding a catalyst which hardens the mixture.

This type of surface finish is ideal for low or medium casting.

It is however an expensive option compared to the other types.

Shell Mold

This type works the same way as sand casting.

However, it uses recyclable patterns which enhances productivity.

It is a common method for the production of smaller parts due to its high level of accuracy.

The advantage of this method is its low cost in terms of production and labor.


This type of surface finish allows you to paint your component with the colors that you want.

Painting enhances the visual appeal of your components while protecting them from external factors like rusting.

Paint compatibility with your part is critical in ensuring you have a successful painting process.


Engraving allows you to have an image or words on the surface of your component.

The advantage of engraving is its durability.

Engraving is also a cheaper option compared to the other types and is easy to apply on your metal part.

What Is The Minimum Wall Thickness Requirement For A Multi-Slide Die Casting?

The minimum wall thickness requirement for your multi-slide die casting varies depending on the component size for production.

However, the thickness should not be that thin to allow for penetration during clamping.

It should also have the capacity to withstand the high temperature of your molten metal during casting.

Thin walls tend to lose heat faster thereby affecting the cooling of your component.

How Do You Compare Entrapped Air Porosity And Solidification Porosity In A Multi-slide Die Casting?

Entrapped air porosity is due to air present on an element that expands and later cools resulting in air porosity.

Solidification porosity is due to the rapid cooling of the metal.

Both air and solidification porosity pose a challenge to the stability of your component.

This is due to the change in the property of your metal part.

When cooling your component, you have to allow for enough time to cool.

This reduces the occurrence of air and solidification porosity.

Is Welding Necessary In Multi-slide Die Casting?

Yes. You have to weld certain parts of your multi-slide die casting.

Welding ensures you have a strong and durable product.

The common welding methods you can apply on multi-slide die casting are metal inert gas welding and tungsten inert gas welding.

The choice of which welding method to use depend on the cost and type of metal you are using for casting.

What Is Squeeze Multi-Slide Die Casting?

Squeeze multi-slide die casting is a type of casting that combines die forging and permanent mold casting.

The combination happens in a single process in which you pour a quantified amount of liquid metal alloy in a preheated lubricated die.

The next step is forging and solidifying under pressure.

For squeeze multi-slide die casting to be a success, you have to fill the liquid metal slowly into die.

This is to maintain the laminar flow.

There are various benefits you get by using squeeze multi-slide die casting.

For instance, you have minimum porosity on the surface of your product.

The product has enhanced strength and ductility.

This is due to the production of a fine-grain microstructure.

The strength is also from the production of a defect-free microstructure.

The die design in this type of casting consists of a large shot end biscuit and a thick gate.

This design prevents freezing of the gates before solidification of the casting.

It also allows for shrinking during the solidification process

How Many Slides Can You Use In A Multi-slide Die Casting?

There is no limit as to the number of slides you can have on your multi-slide die casting.

However, this depends on the size of the machine.

Most machines usually have more than four slides.

These slides are placed in a perpendicular position to each other.

The Number Of Sides Depend On The Size Of The Machine

The Number Of Slides Depend On The Size Of The Machine

Other die-casting techniques includes:

Hot Chamber Die Casting

Vacuum Die Casting

Low-Pressure Die Casting

Gravity Die Casting

Cold Chamber Die Casting

If you have any questions or inquiries about multi-slide die casting, contact us now.

Scroll to Top