解决排气不畅的办法

Solutions to unobstructed exhaust

由于水套芯壁薄，形状为圆弧形，芯盒内腔开设不了大的排气塞，而设置的Φ6排气塞排气效不好，易被堵塞，砂芯常因疏松或射不满芯腔而报废。如开设排气槽排气，一方面会产生跑砂现象，一方面是局部位置需开设排气的地方排气孔道无法引出芯盒外。而一直未解决排气不畅的问题，每次生产时废品都极高。经过一段时间对各种排气方式的比较后。我想到了一种方法，既可解决排气不畅问题又能防止跑砂现象。

Because the core wall of the water jacket is thin and the shape is circular, there is no large exhaust plug inside the core box, and the set of the 6 exhaust plug has bad exhaust effect and is easily blocked. The sand core is often scrapped because of loosening or shooting the core cavity. If the exhaust tank is opened, on the one hand, the phenomenon of sand running will be produced. On the one hand, the local exhaust duct that needs to be set up in the local position can not lead to the core box. But the problem of unsolved exhaust has not been solved, and the waste products are very high in each production. After a period of time, a variety of exhaust modes are compared. I think of a method that can not only solve the problem of exhausting exhaust but also prevent sand running.

方法是将排气槽和排气塞两种排气方法结合起来使用，如图C，在芯盒分槽面需要开设排气槽的地方开设排气槽。但排气槽不直接通出芯盒外，而是在排气槽内再开设排气塞。将进入排气槽内的气流通过排气塞或排气孔排出芯腔外。这样砂气流进入排气槽内后，在排气塞的作用下，气体排掉，砂粒留下，和芯腔及槽形成一个紧实的砂芯。

The method is to combine the exhaust Gute and the exhaust plug with two kinds of exhaust methods. As in figure C, the exhaust trough is opened in the place where the slot surface of the core box needs to be opened. But the exhaust tank is not directly out of the core box, but instead of opening the exhaust plug in the exhaust tank. The air flow into the exhaust tank is discharged out of the core cavity through the exhaust plug or the exhaust hole. As the sand flow enters the exhaust tank, the gas is discharged, the sand is left, and the core cavity and slot form a tight sand core under the action of the exhaust plug.

采用此方法的优点是

The advantage of this approach is

1可解排气槽在使用中易磨损产生喷砂的现象；

1 the phenomenon of sand blasting is easily worn out in the use of the solvable vent.

2可解决砂芯因结构形状等原因，无法开设排气塞或排气槽的问题；

2 can solve the problem that the sand core can not open the exhaust plug or the exhaust slot because of the structure and shape of the sand core.

3由于排气系统开设在分模面上，便于观察排气是否畅通。能及时发现是否有堵塞，预防废品的产生，且清理方便。

3 because the exhaust system is opened on the parting surface, it is convenient to observe the expedite of the exhaust. It can be timely found whether there are clogging, prevent the production of waste, and easy to clean up.