This article explores the significant role of zinc die casting in the electronics industry also highlighting its advantages and applications.

Zinc die casting is a process where molten zinc alloys are injected into a steel die that has been finished with lubricant. Due to their flexibility, impact strength and low melting point, zinc alloys are used for parts production for various industries including the electronics industry. In addition, the casting process takes place at a lower temperature due to the low melting point of the material. This makes the hot chamber die casting process convenient compared to other technologies. In addition, hot chamber die casting is a process th at promotes longer die life and faster recovery time compared to other die casting compatible materials.

Applications of zinc die casting products in various industries

Zinc die casting parts are used in various industries due to its durability and strength. Below is a list of industries / sectors in which zinc die casting components are being commonly used because of its various advantages and benefits that it provides to the manufacturers as well as to the users of the final product.

• Home appliances

Zinc casting is used to make a variety of household items including belts, furniture inserts, door handles and locks. Its strength and dimensional stability make it ideal for use in home appliances.

• Automotive sector

Zinc castings are used in the production of interior fittings in automobiles. These castings are preferred over aluminum because they are stronger. Examples of automotive zinc alloy castings include bearings and steering.

• Mechanical sector

Zinc die casting parts are used to produce engine parts used in mechanics. The properties of zinc, such as corrosion resistance and hardness make it a more desirable option than aluminum.

• Electronics

Zinc die castings are used in the production of electronic components such as energy regulators, switches, ceramic resistors and wall clocks. The zamak – 3 alloy is best suited for these parts because it offers dimensional stability.

Why is die casting used in electronics industry?

Die casting is used in the electronics industry for its ability to produce complex, highly detailed and accurate metal parts in large quantities. The process creates a uniform and consistent parts with a smooth surface finish which is important for housing delicate components. Additionally, die casting can be used to produce parts with intricate shapes, thin walls and tight tolerances which are often required in electronic applications. The process also offers the option of incorporating internal voids and passages for electrical and mechanical connections.

Zinc die casting and aluminium die casting are used to make electronic products. Zinc die casting is used in applications that require high mechanical strength such as connectors and terminal blocks. Zinc has good castability and can be easily formed into complex shapes making it well – suited for die casting. Additionally, zinc offers good electrical conductivity and good corrosion resistance which are important factors in the electronics industry.

Zinc die casting in electronics parts

In the electronics industry, zinc die casting is used to produce various parts. Some of them are mentioned below:

• Connectors and housings

Zinc die cast connectors and housings are widely used in electronic devices to provide robust and reliable connections. The high precision achievable through die casting ensures that these components meet the demanding specifications of modern electronic devices.

• Enclosures for electronic devices and components

Electronic device enclosures play a crucial role in protecting internal components from external elements such as dust, moisture and physical damage. Zinc die – cast enclosures offer a durable and cost – effective solution ensuring the integrity and longevity of the enclosed electronic systems. Zinc’s excellent electrical conductivity also provides good EMI, RFI and ESD shielding.

• Heat sinks

Zinc has a lower thermal conductivity compared to pure aluminium, however if we compare the thermal conductivity between die-cast zinc alloy and die cast aluminium alloy we can see that the thermal conductivity is very similar. Zinc remains a valuable material in many industries. Zinc’s excellent fluidity permits the production of thinner, finer and closely spaced fins that provide a larger surface area but less volume. Zinc is also stronger, stiffer and tougher than aluminum, die-cast aluminum and magnesium. Zinc also offers strong resistance to impact and great flexibility. Some of these characteristics makes zinc an ideal choice for manufacturing heat sinks.

• Chassis and frames

Chassis and frames provide structural support for various electronic components within a device. Zinc die – casting for chassis and frames offers a lightweight yet sturdy solution contributing to the overall structural integrity and mechanical stability of electronic devices.

• Bases and mounting plates

Bases and mounting plates are essential components for securely positioning electronic devices and ensuring stability. Zinc die – cast bases and mounting plates provide a strong and reliable foundation allowing for secure installation and optimal functionality of electronic equipment.

• Handles and knobs

Handles and knobs are user interface components that enhance the ergonomics and usability of electronic devices. Zinc die – cast handles and knobs provide a combination of durability and design flexibility contributing to a positive user experience in various electronic applications.

• Electromagnetic interference shielding components

Zinc alloys possess electromagnetic interference shielding properties making them suitable for components that require protection from external electromagnetic radiation. This is particularly important in sensitive electronic devices where interference can lead to malfunctions.

• Brackets and supports

Brackets and supports play a vital role in securing and stabilizing internal components within electronic devices. Zinc die cast brackets and supports offer reliable structural support ensuring the proper alignment and functionality of various elements within electronic systems.

• Cable glands

Cable glands are essential for providing secure entry points for cables while maintaining environmental seals. Zinc die – cast cable glands offer robust protection against moisture and other external factors ensuring the integrity of electrical connections in electronic devices.

• Bezels and trim pieces

Bezels and trim pieces contribute to the aesthetic appeal of electronic devices while providing functional features. Zinc die – cast bezels and trim pieces offer a combination of design versatility and durability enhancing the overall appearance and user interface of electronic equipment.

Benefits of Die Casting for Electronics

• High accuracy and dimensional stability

Zinc die casting in electronics industry results in consistent and reliable parts that are produced because of its high accuracy and stability in dimensions.

• Enhanced mechanical properties

Zinc alloys exhibit excellent mechanical properties including high strength, durability and corrosion resistance. Zinc is a versatile material with good strength, corrosion resistance, and stability. These characteristics make zinc die cast components ideal for electronic applications where reliability and longevity are paramount.

• Cost effective production

The efficiency of the die casting process contributes to the cost – effective production. Manufacturers benefit from reduced material wastage, shorter production cycles and lower energy consumption making zinc die casting an economically viable option.

• Design flexibility

Zinc, with its complex and intricate melting point, can be cast into a variety of shapes making it a popular option for many different designs.

• Precision and complexity

Zinc die casting enables the production of highly intricate and complex components with tight tolerances. This is crucial in the electronics industry where small, precisely engineered parts are often required for devices such as smartphones, laptops and other electronic gadgets.

• Surface finish

Zinc die casting is ideal for applications that require a smooth surface finish, which can be easily painted or plated and thus eliminates the need for additional finishing operations.

• Fast production

Zinc casting is an efficient and rapid production method making it well suited for large scale manufacturing.

Conclusion

Zinc die casting has emerged as a key player in the electronics industry offering a winning combination of precision, cost effectiveness and superior mechanical properties. As electronic devices continue to advance in complexity and miniaturization, the role of zinc die casting is likely to expand further that will also contribute to the evolution of the electronics landscape. Manufacturers and engineers are embracing this versatile manufacturing process to meet the growing demands for high quality electronic components in the digital age.

Also, as industries increasingly are prioritizing sustainability and environmental responsibility, zinc die casting also presents itself as an eco – friendly solution. With its recyclability and minimal waste production during manufacturing, zinc die casting itself aligns with the goals of sustainable production practices. Furthermore, the versatility of zinc alloys allows for the creation of different varied designs and shapes which helps in catering to the evolving preferences of consumers in the electronics market. As a result, the future of zinc die casting appears to be promising and it also has a potential to play an integral role in shaping the next generation of electronic devices while meeting the demands of both manufacturers and the consumer.

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Characteristics of zamak

Zamak is an alloy composed of zinc, aluminum, magnesium and copper. According to the different percentages of these components the alloy has variable characteristics and can be used for the manufacturing of products for different market sectors. For an in-depth look at different types of zamak and their features, read the article ZAMAK molding in hot chamber die casting: chemical composition.

The characteristics of zamak that are particularly beneficial for the production of components for electronic products are:

Electromagnetic shielding

Zamak has good shielding properties with reference to Electromagnetic Interference (EMI). Therefore, it is especially suitable for the production of housings for electromagnetic cards because it is a product that requires a reduction of interferences

Heat dissipation

The properties of heat dissipation of zamak are similar, if not higher, to those of other materials. In this case, what makes zamak products competitive is the manufacturing cost of the product, the lifespan of the mold and the possibility to achieve products that do not need relevant secondary mechanical operations. For further information about this property of zamak, we suggest this case study: Zinc Heatsink Case Study: Loewe TV Heatsink.

Thin wall thickness and reduced dimensions

Zamak fluidity allows the achievement of a very thin wall thickness and of an extremely high level of detail in components of reduced dimensions. This is particularly important in the case of electronic products, which usually are characterized by very small dimensions and by a great number of details.

Stiffness and anti-vibration properties

These properties of zamak are especially relevant in case of electronic products employed in critical environments. In the industrial field, for example, electronic connections of some kinds of machine tools could be exposed to mechanical stress or vibration. It is evident that in cases like the one just described, zamak offers a protection and a vibration damping capacity that plastic could not offer.

To discover something more about chemical, physical and mechanical characteristics of zamak read the Zinc Association Engineering in Zinc, Today’s Answer, which contains very detailed information on these subjects.

Zamak components for electronic products: characteristics and competitive advantages

Let’s now analyze some zamak components for electronic products to examine their characteristics and competitive advantages.

Hard disk case

In this hard disk case we can observe how zamak properties contribute to the functionality of the product in several ways. Indeed, the case is anti-vibration and this allows the hard disk to work in stable conditions. Furthermore, as you can see in the picture, the product has both very small particulars and thin thickness. Specifically, directly during casting phase thanks to zamak it has been possible to realize the honeycomb grid that allows heat dissipation in the server through air circulation. With other materials the grid could have been achieved only through secondary operations, such as shearing, with unavoidable consequences in terms of timing and costs.

Housing for steering wheel lock

This housing hosts the electronic card of the steering wheel lock. In this case it is the properties of electromagnetic shielding and stiffness of zamak to make the product competitive compared with other similar products manufactured with other materials. As a matter of fact, the shielding allows the electronic card to function in optimal conditions without being subjected to the interference of near electromagnetic fields. Then, for this particular product, stiffness makes zamak especially competitive compared to plastic. Often when plastic housings are installed electronic cards tend to bend, whereas  the stiffness of zamak leads to a higher protection, thus extending its lifespan.

Device for checking, counting and separating banknotes

As far as this product is concerned, zamak has replaced stainless steel, thus cutting production costs and the need for mechanical operations and finishing. This has been made possible by the properties of zamak and especially by the capacity of the alloy to reach thin wall thickness and a high degree of detail. In this way the customer has obtained a product that does not need to be assembled, manufactured with molds with a long lifespan, which need little maintenance and with scrap rates close to zero.

Housing for corporate network connectors

The housing for corporate network connectors is illustrative of the properties of shielding, stiffness and resistance of zamak. For these kinds of products, shielding properties of zamak allow freedom to the electronic designer, who can mitigate the drawbacks linked to the electromagnetic waves without special precautions, but only through the choice of the most suitable material. Stiffness and resistance of the material make the use of the component suitable for particularly critical environments, such as production departments of a plant.

Conclusions

With this brief overview on zamak components for electronic products we have analyzed how some properties of zinc alloys allow the achievement of competitive and effective products. However, these are not the only components for the electronic industry that can be manufactured in zamak. For a more comprehensive overview visit our website www.bruschitech.com in the Services page.

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Caratteristiche della zama

La zama è una lega composta da zinco, alluminio, magnesio e rame. A seconda delle diverse percentuali di questi componenti la lega assume caratteristiche variabili e si presta alla realizzazione di prodotti destinati a diversi settori di mercato. Per un approfondimento sui diversi tipi di zama e sulle loro caratteristiche consigliamo di leggere il post Composizione della ZAMAK per pressofusione.

Le caratteristiche della zama che risultano particolarmente vantaggiose nella realizzazione di componenti per prodotti elettronici sono:

Schermatura elettromagnetica

La zama ha buone proprietà schermanti nei confronti dell’interferenza elettromagnetica (Electromagnetic Interference, EMI). Risulta quindi particolarmente adatta nella realizzazione di housing per schede elettromagnetiche in cui si ha la necessità di ridurre le interferenze

Dissipazione del calore

Le proprietà di dissipazione del calore della zama sono simili se non superiori a quelli di altri materiali. In questo caso, a rendere competitivi i prodotti in zama, sono il costo di realizzazione del prodotto, la durata di vita dello stampo e la possibilità di ottenere prodotti che non necessitano di importanti lavorazioni meccaniche successive. Per approfondire questa proprietà della zama suggeriamo di leggere Zinc Heatsink Case Study: Loewe TV Heatsink

Spessori sottili e dimensioni ridotte

La fluidità della zama consente di ottenere spessori molto sottili e un elevatissimo grado di dettaglio nei particolari di dimensioni ridotte. Questo è particolarmente importante nel caso dei prodotti elettronici dove, a fronte di dimensioni molto contenute, i componenti presentano numerosi dettagli

Rigidità e proprietà antivibranti

Queste proprietà della zama sono particolarmente rilevanti nel caso di prodotti elettronici impiegati in ambienti critici. In ambito industriale, ad esempio, i collegamenti elettronici di alcuni tipi di macchine utensili potrebbero essere sottoposti a sollecitazioni meccaniche o vibrazioni: è evidente come in casi simili la zama offra una protezione e una capacità di smorzamento delle vibrazioni che la plastica non potrebbe offrire

Per scoprire di più sulle caratteristiche chimiche, fisiche e meccaniche della zama rimandiamo alla pubblicazione dell’International Zinc Association Engineering in Zinc, Today’s Answer  che contiene una serie di informazioni molto approfondite su questi temi, ai quali noi abbiamo brevemente fatto accenno.

Componenti in zama per prodotti elettronici: caratteristiche e vantaggi competitivi

Analizziamo ora alcuni componenti in zama destinati a prodotti elettronici per indagarne caratteristiche e vantaggi competitivi.

Case per hard disk

Nei case per hard disk è possibile riscontrare come le proprietà della zama contribuiscano alla funzionalità del prodotto sotto diversi punti di vista. Infatti i case realizzati in zama sono antivibranti e questo consente all’hard disk di lavorare in condizioni stabili. Inoltre, come si può osservare in fotografia, i prodotti presentano sia particolari molto piccoli che spessori sottili. Nel dettaglio, la zama ha consentito, direttamente in fase di stampaggio, la realizzazione del reticolo a nido d’ape che consente la dissipazione del calore nel server tramite la circolazione dell’aria. Con l’impiego di altri materiali il reticolo si sarebbe potuto ottenere solo mediante lavorazioni successive, come ad esempio la tranciatura, con inevitabili conseguenze in termini di tempi e costi.

Housing per bloccasterzo

Questo housing ospita la scheda elettronica del bloccasterzo. In questo caso sono le proprietà di schermatura elettromagnetica e di rigidità della zama a rendere il prodotto competitivo rispetto ad altri analoghi realizzati con altri materiali. La schermatura consente infatti alla scheda elettronica di lavorare in condizioni ottimali senza subire l’interferenza di campi elettromagnetici vicini. La rigidità rende poi, per questo particolare tipo di prodotto, la zama particolarmente competitiva nei confronti della plastica. Spesso infatti, quando sono installate in housing di plastica, le schede elettroniche si flettono mentre la rigidità della zama ne permette una maggiore protezione allungandone la durata di vita.

Apparecchiatura per il controllo, il conteggio e la separazione delle banconote

Nel caso di questo prodotto la zama ha sostituito l’acciaio inossidabile abbattendo i costi di produzione e la necessità di lavorazioni meccaniche e finiture. Tutto ciò è stato reso possibile dalle proprietà della zama e in particolare dalla capacità della lega di raggiungere spessori sottili ed un elevato grado di dettaglio. In questo modo il cliente ha ottenuto un prodotto che non necessita di essere assemblato, realizzato con stampi dall’alta durata di vita e che necessitano di poca manutenzione e con percentuali di scarto vicine allo zero.

Housing per connettori di reti aziendali

L’housing per connettori di reti aziendali è esplicativo delle proprietà di schermatura, rigidità e resistenza della zama. Le proprietà di schermatura della zama consentono, per questo tipo di prodotti, libertà al progettista elettronico che può ovviare agli inconvenienti legati alle onde elettromagnetiche senza particolari accorgimenti ma solo attraverso la scelta del materiale più opportuno. La rigidità e la resistenza del materiale rendono l’impiego del componente adatto ad ambienti particolarmente critici, come ad esempio i reparti produttivi di uno stabilimento.

Conclusioni

Con questa breve panoramica di articoli in zama destinati a prodotti elettronici abbiamo analizzato come alcune proprietà delle leghe di zinco consentano di ottenere componenti competitivi e performanti. Tuttavia, i compoenti per elettronica che è possibile realizzare in zama non si esauriscono qui, per una panoramica più completa potete visitare il sito www.bruschitech.com alla pagina Servizi.

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