压铸高温模温机

压铸高温模温机Die casting high temperature mold temperature machine

压铸高温模温机
多数人可能会认为模温机只应用在塑胶料注塑成型领域，其实不然模温机也应用在压铸领域，那在压铸领域该如何使用模温机呢?又体现了哪些优点呢?

一、压铸行业正确使用压铸高温模温机的方法

压铸高温模温机1.在正式压铸前，一般用对模具表面热模。单单对模具表面预热，容易造成应力集中，损害模具，因此，模温机应当在燃气热模前开启至少半个小时，以便模具内外同时热起，模肉产生的应力较小，对模具寿命延长有好处

压铸高温模温机2.。在使用模温机前，需要检查有无足够的传热介质(油或者水)、有无压力(即压力表为零)，若出现异常，机器不能强行启动，否则会损坏机器，甚者造成**事故。

压铸高温模温机3.机器连接模具**次运行、停机较久、换模，要进行排气操作——因为空气是热的**导体，会影响到传导热量的效果，具体方法如下：

(1) 先将模温机的温度设定为零度，开机运行10分钟;

(2.)当压力显示正常后，再加温至120℃，运行20分钟，进行排气;

(3.)再将温度调至压铸生产的正常范围内(一般为180℃~300℃)，当然，设定温度还需要根据产品工艺要求而定。

(4.)7防止模温机出事故需要采取**措施并定期对模温机进行保养维护

4.若有条件的话，不妨将待生产的模具在下面接上模温机热模，这样可以节约额外的工时，提高效率。

二、排除**隐患的方法：

这里的事故是指机械故障和**事故。模温机用的导热油属于有机物，在一定的条件下，导热油会燃烧，而压铸工作温度也较高，为**亮起长明灯。因此，在使用模温机的时候，必须知道存在哪些隐患并做好相应**措施：

1、模温机要尽量远离热源(如熔炼炉、保温炉)，一方面可防止导热油起火，另一方面防止温度过高，模温机电子元件过早老化;

2、模具联接必须采用包皮管或绝热管以防泄漏和能承受温度和压力(图3、温度超过245℃时，只能用金属导管。一些模温机管接处或者管散发出呛人的油烟，而模温机离炉子非常近，压铸合金液体的温度一般要超过600℃，容易燃烧失火，是比较危险的;

4、定期检查模温机外接管路和内部管路，确认接头处无泄漏;

5、切不可用一般的有作介质，而要使用热稳定性好的合成导热油，减少积垢;

6、定期更换导热油(更换周期根据导热油的说明书及供应商的建议而定);

7、每次下模后，检查是否存在机械故障隐患和电气、控制是否存在问题

三、使用模温机在压铸工艺体现出的优点

在压铸工艺中，使用模温机常带来很多优点：

1、延长模具寿命

2、因使得模具热分布更均匀，可延长模具寿命;

3、均匀和平稳地预热模具，消除应力裂纹——模具用火焰预热等常造成局部过热或间隙水冷形成热冲击引起局部内应力，而使用模温机预热克服了这一点;

4、降低成本模具处于较好的状态，维修次数会减少;

5.脱模剂用量减少;

6.铸质量稳定，可以降低检查频率，检验成本降低;

7.预热时间缩短;

8.模温恒定并处于工艺要求区间，液态金属不容易粘模;

9.温度均匀，模具配件磨损小;

10.用导热油，冷却通道不生锈、不结垢，而水冷却就容易使通道生锈，堵塞。

11、提高生产率:

(1)生产开始前，有目的地快速预热模具;

(2)生产开始时模温即恒定，废品减少—不需要很多模次预热低速压射;

(3)模温自动控制，与生产过程无关，所以铸件质量稳定;

(4)生产中断重启，废品减少——模具会保持热稳定;

(5) 缩短了节拍，达到节能效果。

12、改善压铸技术

(1)温控制不依赖操作人员;

(2.)模具温度相对恒定，可以适应于压铸薄壁铸件;

(3.)散发热量降低，改善生产环境;

(4)全自动化运行，模温可以自动控制;

压铸实践表明，在合金熔炼控制合格的情况下，铸造缺陷主要由模温不正常引起，达安泰的模温机可以有效帮助压铸工艺控制模温在合理的范围之内，以获得上等的铸件和提高生产效率，让客户满意，实现效益的*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.