目前市場(chǎng)上提供多種加熱器配置。用于塑料機(jī)械料筒加熱的有三類常見加熱器：云母、陶瓷關(guān)節(jié)及金屬鑄造加熱器。

一、云母加熱器：

云母加熱圈大約厚5mm，能適應(yīng)多種幾何形狀和特殊部件，如孔和凹槽，但云母用于加熱器絕緣層時(shí)，云母溫度不應(yīng)超過550℃。當(dāng)溫度超過該水平，粘合劑就開始退化，絕緣強(qiáng)度也將變?nèi)?，因此加熱器的護(hù)套溫度不能超過450℃。以及云母加熱器的標(biāo)準(zhǔn)功率密度只有3W/cm2。目前云母加熱器已很難滿足越來越多塑料工藝的要求。

二、陶瓷加熱器：

陶瓷具有耐高溫絕緣性，因此陶瓷加熱器可處理760℃的溫度。陶瓷加熱器的柔軟可形成各種加熱器直徑。遺憾的是，陶瓷的優(yōu)點(diǎn)也是其弱點(diǎn)，由于它能存儲(chǔ)元件金屬絲產(chǎn)生的熱量，因此人們很難控制陶瓷加熱器的溫度。這會(huì)導(dǎo)致不必要的廢料，在塑料生產(chǎn)工藝的較早階段，這一點(diǎn)尤其突出。另外，陶瓷加熱器在拆裝過程中容易損壞，特別是升溫以后，加熱器會(huì)變得比較松散，給安裝帶來不便。陶瓷加熱器不能受到污染這一特性也限止了這類加熱器的應(yīng)用范圍。

三、 金屬鑄造加熱器：

金屬鑄造加熱器是將一定形狀的加熱管澆鑄在銅、鋁或鐵等材料中，這類加熱器體積較大，制作成本高，生產(chǎn)過程中能耗高，對(duì)環(huán)境有污染，以及使用時(shí)熱效率較低，國外已較少采用此類加熱器（除非特定要求）。

四、新型氧化鎂絕緣加熱圈

氧化鎂絕緣加熱圈是一種高性能的加熱器，采用導(dǎo)熱性能比傳統(tǒng)的云母和陶瓷更高的氧化鎂作為絕緣材料，一層薄薄的致密的氧化鎂填充在電熱絲與金屬外套之間，電熱絲的熱量迅速傳遞給被加熱物體，降低了電熱絲的溫度，大大的提高了加熱器的使用壽命。氧化鎂的耐高溫性和壓縮層具有卓越的導(dǎo)熱性能和絕緣強(qiáng)度，氧化鎂絕緣加熱圈的功率密度達(dá)到15W/cm2，使用溫度可達(dá)760℃，利用該性能可制造加熱器以適應(yīng)現(xiàn)代的塑料制造工藝。

考慮加熱器類型時(shí)，必須了解每種類型加熱器的性能和局限。零件的幾何形狀、溫度和加熱時(shí)間要求確定機(jī)器所需加熱器的類型。

每個(gè)類型加熱器都具有與眾不同的特點(diǎn)。當(dāng)加熱器加熱零件時(shí)，由內(nèi)部絕緣體提供必要的絕緣強(qiáng)度，所以區(qū)分這些加熱器的材料是內(nèi)部絕緣體。每個(gè)加熱器中的絕緣體對(duì)加熱器的壽命和性能具有重要影響。

現(xiàn)代塑料加工工藝對(duì)加熱器的要求會(huì)更高，對(duì)溫度的均勻性、熱反應(yīng)性能、特殊材料所需的高溫要求以及倍受關(guān)注的熱效率，氧化鎂絕緣加熱器因其出色導(dǎo)熱性能和絕緣強(qiáng)度，在加熱器市場(chǎng)一定會(huì)占地位。

Currently on the market offers a variety of heater configurations. There are three common types of heaters: mica, ceramic joints and metal casting heater for plastic machinery barrel heating.

●Mica heater:

Mica heating coil about the thickness of 5mm, can adapt to a variety of geometric shapes and special parts, such as holes and grooves, but mica for the heater insulating layer, mica temperature should not exceed 550℃. When the temperature exceeds this level, the adhesive begins to degenerate, the insulation strength is becoming weaker, so the heater sheath temperature must not exceed 450 ℃. Mica heater standard power density 3W/cm2. The mica heater has been difficult to meet the requirements of more and more plastic process.

●The ceramic heater:

Because of the high temperature ceramic insulation, the ceramic heater can be processed to a temperature of 760℃. The. The soft ceramic heater may be formed various heaters diameter. Unfortunately, the advantages of the ceramic is also its weakness, due to the heat generated can store element wire, so it is difficult to control the temperature of the ceramic heater. This causes unnecessary waste, in plastic an earlier stage of the production process, which is particularly prominent. In addition, the ceramic heater is easy to damage during disassembly, especially after the temperature, the heater will become more loose, to install the inconvenience. The ceramic heater of this feature can not be contaminated and also limiting the scope of application of such a heater.

●The metal casting heater:

Is a certain shape of the heating tube cast in copper, aluminum or iron material, this type of heater sizes, high production costs, high energy consumption in the production process, the pollution of the environment, as well as a lower thermal efficiency in the use of foreign been less used to this type of heater (unless a specific request).

●The new magnesium oxide insulated heating coil：

Magnesium oxide insulated heating coil is a high performance heater, thermal conductivity than the traditional mica and ceramic higher purity magnesium oxide as the insulating material, a thin layer of dense magnesium oxide filled in electric wire and metal jacket between the heat of the heating wire quickly passed to the object to be heated, reducing the temperature of the heating wire, greatly improve the life of the heater. Magnesium oxide of high temperature and compression layer has excellent thermal conductivity and dielectric strength, magnesium oxide insulated heating coil power density 15W/cm2 use temperatures up to 760℃, the use of the performance can be manufactured efficient heater to adapt to the modern plastic manufacturing process.

Considering the type of heater, you must understand the performance and limitations of each type of heater. Part geometry, temperature and heating time required to determine the type of machine desired heater.

Each type heater has distinctive features. When heated by a heater parts, by the internal insulator to provide the necessary dielectric strength, so the only material to distinguish these heater internal insulator. The insulator of each heater has an important impact on the life and performance of the heater.

Modern Plastics Processing and process requirements of the heater will be higher, temperature uniformity, thermal reaction performance, high temperature requirements of special materials required, and the thermal efficiency of a well-focused, magnesium oxide insulation heater because of its excellent thermal conductivity and dielectric strength will figure prominently in the heater market.

江蘇通亞電熱科技有限公司座落在黃海之濱-江蘇鹽城，位于美麗的大縱湖畔，環(huán)境優(yōu)美，地理位置優(yōu)越，交通便利。本企業(yè)擁有一批富有創(chuàng)新開拓精神的技術(shù)管理和生產(chǎn)人員，并與國內(nèi)眾多設(shè)計(jì)院、大專院校及科研單位長期穩(wěn)定合作。產(chǎn)品暢銷全國二十多個(gè)省市自治區(qū)。加熱器產(chǎn)品已通過CE認(rèn)證，并以其優(yōu)良的節(jié)能性、性、美觀性、實(shí)用性深受用戶的廣泛贊譽(yù)。 銳意開拓的先驅(qū)精神使通亞電器自1983年成立以來就一直是行業(yè)的先鋒。我們?cè)诓粩嗑喸旆犀F(xiàn)代塑料工藝高要求(環(huán)保節(jié)能、加熱穩(wěn)定均勻)的電熱元件。

Yancheng Tongya Electrical Appliances is located by the Longitudinal Lake in Yancheng, Jiangsu Province with beautiful environment, superior geographical position and convenient transportation. We own a team of innovative technical management staff and manufacturing workers. Meanwhile long-term and stable cooperation is kept with numerous domestic design institutes, colleges and R