壓鑄高溫模溫機Die casting high temperature mold temperature machine

壓鑄高溫模溫機
多數(shù)人可能會認為模溫機只應用在塑膠料注塑成型領(lǐng)域，其實不然模溫機也應用在壓鑄領(lǐng)域，那在壓鑄領(lǐng)域該如何使用模溫機呢?又體現(xiàn)了哪些優(yōu)點呢?

一、壓鑄行業(yè)正確使用壓鑄高溫模溫機的方法

壓鑄高溫模溫機1.在正式壓鑄前，一般用對模具表面熱模。單單對模具表面預熱，容易造成應力集中，損害模具，因此，模溫機應當在燃氣熱模前開啟至少半個小時，以便模具內(nèi)外同時熱起，模肉產(chǎn)生的應力較小，對模具壽命延長有好處

壓鑄高溫模溫機2.。在使用模溫機前，需要檢查有無足夠的傳熱介質(zhì)(油或者水)、有無壓力(即壓力表為零)，若出現(xiàn)異常，機器不能強行啟動，否則會損壞機器，甚者造成**事故。

壓鑄高溫模溫機3.機器連接模具**次運行、停機較久、換模，要進行排氣操作——因為空氣是熱的**導體，會影響到傳導熱量的效果，具體方法如下：

(1) 先將模溫機的溫度設(shè)定為零度，開機運行10分鐘;

(2.)當壓力顯示正常后，再加溫至120℃，運行20分鐘，進行排氣;

(3.)再將溫度調(diào)至壓鑄生產(chǎn)的正常范圍內(nèi)(一般為180℃~300℃)，當然，設(shè)定溫度還需要根據(jù)產(chǎn)品工藝要求而定。

(4.)7防止模溫機出事故需要采取**措施并定期對模溫機進行保養(yǎng)維護

4.若有條件的話，不妨將待生產(chǎn)的模具在下面接上模溫機熱模，這樣可以節(jié)約額外的工時，提高效率。

二、排除**隱患的方法：

這里的事故是指機械故障和**事故。模溫機用的導熱油屬于有機物，在一定的條件下，導熱油會燃燒，而壓鑄工作溫度也較高，為**亮起長明燈。因此，在使用模溫機的時候，必須知道存在哪些隱患并做好相應**措施：

1、模溫機要盡量遠離熱源(如熔煉爐、保溫爐)，一方面可防止導熱油起火，另一方面防止溫度過高，模溫機電子元件過早老化;

2、模具聯(lián)接必須采用包皮管或絕熱管以防泄漏和能承受溫度和壓力(圖3、溫度超過245℃時，只能用金屬導管。一些模溫機管接處或者管散發(fā)出嗆人的油煙，而模溫機離爐子非常近，壓鑄合金液體的溫度一般要超過600℃，容易燃燒失火，是比較危險的;

4、定期檢查模溫機外接管路和內(nèi)部管路，確認接頭處無泄漏;

5、切不可用一般的有作介質(zhì)，而要使用熱穩(wěn)定性好的合成導熱油，減少積垢;

6、定期更換導熱油(更換周期根據(jù)導熱油的說明書及供應商的建議而定);

7、每次下模后，檢查是否存在機械故障隱患和電氣、控制是否存在問題

三、使用模溫機在壓鑄工藝體現(xiàn)出的優(yōu)點

在壓鑄工藝中，使用模溫機常帶來很多優(yōu)點：

1、延長模具壽命

2、因使得模具熱分布更均勻，可延長模具壽命;

3、均勻和平穩(wěn)地預熱模具，消除應力裂紋——模具用火焰預熱等常造成局部過熱或間隙水冷形成熱沖擊引起局部內(nèi)應力，而使用模溫機預熱克服了這一點;

4、降低成本模具處于較好的狀態(tài)，維修次數(shù)會減少;

5.脫模劑用量減少;

6.鑄質(zhì)量穩(wěn)定，可以降低檢查頻率，檢驗成本降低;

7.預熱時間縮短;

8.模溫恒定并處于工藝要求區(qū)間，液態(tài)金屬不容易粘模;

9.溫度均勻，模具配件磨損小;

10.用導熱油，冷卻通道不生銹、不結(jié)垢，而水冷卻就容易使通道生銹，堵塞。

11、提高生產(chǎn)率:

(1)生產(chǎn)開始前，有目的地快速預熱模具;

(2)生產(chǎn)開始時模溫即恒定，廢品減少—不需要很多模次預熱低速壓射;

(3)模溫自動控制，與生產(chǎn)過程無關(guān)，所以鑄件質(zhì)量穩(wěn)定;

(4)生產(chǎn)中斷重啟，廢品減少——模具會保持熱穩(wěn)定;

(5) 縮短了節(jié)拍，達到節(jié)能效果。

12、改善壓鑄技術(shù)

(1)溫控制不依賴操作人員;

(2.)模具溫度相對恒定，可以適應于壓鑄薄壁鑄件;

(3.)散發(fā)熱量降低，改善生產(chǎn)環(huán)境;

(4)全自動化運行，模溫可以自動控制;

壓鑄實踐表明，在合金熔煉控制合格的情況下，鑄造缺陷主要由模溫不正常引起，達安泰的模溫機可以有效幫助壓鑄工藝控制模溫在合理的范圍之內(nèi)，以獲得上等的鑄件和提高生產(chǎn)效率，讓客戶滿意，實現(xiàn)效益的*大化。

Most people may think that the mold temperature machine is only used in the field of plastic injection molding, in fact, the mold temperature is also used in the field of die-casting, die-casting in the field of how to use the mold temperature machine? What are the advantages of it?

First, the die-casting industry, the correct use of die-casting high temperature mold temperature method

Die-casting high-temperature mold temperature machine 1. In the formal die-casting, the general use of mold surface thermal mold. Only the surface of the mold preheating, easy to cause stress concentration, damage to the mold, therefore, the mold temperature machine should be opened in the gas hot mold at least half an hour before the mold inside and outside at the same time heat, mold the stress generated by mold, Extension is good

Die-casting high temperature mold temperature machine 2 Before using the mold temperature machine, you need to check whether there is enough heat transfer medium (oil or water), whether the pressure (that is, the pressure gauge is zero), if abnormal, the machine can not be forced to start, otherwise it will damage the machine, Safety accident.

Die-casting high temperature mold temperature machine 3. Machine connection mold for the first time running, shut down for a long time, for mold, to carry out exhaust operation - because the air is hot bad conductor, will affect the heat conduction effect, the specific method is as follows:

(1) first set the temperature of the mold temperature is set to zero, start running for 10 minutes;

(2.) When the pressure is normal, then heated to 120 ℃, run for 20 minutes, the exhaust;

(3.) and then adjust the temperature to the normal range of die-casting production (usually 180 ℃ ~ 260 ℃), of course, set the temperature also need to be based on product requirements.

(4) 7 to prevent mold temperature accidents need to take safety measures and regular maintenance of mold temperature maintenance

4. If conditions permit, may wish to be produced in the mold below the mold temperature machine mold, so you can save additional work hours, improve efficiency.Second, the exclusion of security risks:

The accident here refers to mechanical failure and safety accident. Mold temperature machine with the heat transfer oil is organic, under certain conditions, the heat transfer oil will burn, and die-casting temperature is also high, for the safety of long light. Therefore, in the use of mold temperature machine, we must know what the hidden dangers and do the appropriate security measures:

1, mold temperature machine as far as possible away from heat sources (such as melting furnace, holding furnace), on the one hand to prevent the heat oil fire, on the other hand to prevent the temperature is too high, mold temperature electronic components premature aging;

2, the mold connection must use the foreskin tube or adiabatic tube to prevent leakage and can withstand temperature and pressure (Figure 3, the temperature exceeds 245 ℃, can only use metal pipe. Some mold temperature pipe joints or tube issued a choking Soot, and mold temperature machine from the furnace is very close, die-casting alloy liquid temperature generally more than 600 ℃, easy to burn fire, is more dangerous;

4, regular inspection mold outside the pipeline and internal piping, to confirm no leakage at the joint;

5, must not use the general medium, but to use good thermal stability of the synthesis of heat transfer oil to reduce fouling;

6, the regular replacement of heat transfer oil (replacement cycle according to the instructions of the heat transfer oil and the recommendations of the supplier);

7, each time after the mold, check for the existence of mechanical hazards and electrical control, whether there is a problem

Third, the use of mold temperature in the die-casting process reflects the advantages

In the die-casting process, the use of mold temperature machine often bring a lot of advantages:

1, to extend the die life

2, because the mold heat distribution is more uniform, can extend the die life;

3, uniform and smooth preheating mold, to eliminate stress cracks - mold with warm preheating and so often caused by local overheating or interstitial water cooling caused by thermal shock caused by local stress, and the use of mold temperature preheat to overcome this;

4, reduce the cost of mold in a better state, the number of maintenance will be reduced;

5. Reduce the amount of release agent;

6. Casting quality and stability, can reduce the check frequency, test cost reduction;

7. Warming time is shortened;

8. Mold temperature is constant and in the process requirements range, liquid metal is not easy to stick mold;

9. Temperature uniformity, mold parts wear small;

10. With the heat transfer oil, cooling channel does not rust, no scaling, and water cooling is easy to make the channel rust, plug.

11, to improve productivity:

(1) before the start of production, the purpose of rapid preheating mold;

(2) the mold temperature at the beginning of the production is constant, waste reduction - do not need a lot of mold preheating low-speed injection;

(3) mold temperature automatic control, and the production process has nothing to do, so the casting quality and stability;

(4) production interrupt restart, waste reduction - mold will remain thermally stable;

(5) shorten the beat, to achieve energy saving effect.

12, to improve the die-casting technology

(1) temperature control does not depend on the operator;

(2.) mold temperature is relatively constant, can be adapted to die-casting thin-walled castings;

(3.) to reduce the heat to reduce the production environment;

(4) fully automated operation, mold temperature can be automatically controlled;

Die casting practice shows that in the case of alloy smelting control qualified, casting defects are mainly caused by the mold temperature is not normal, the extension of the mold temperature machine can effectively help die casting process control mold temperature within a reasonable range to obtain high-quality castings And improve production efficiency, customer satisfaction, to achieve maximum efficiency.