热芯盒跑砂产生孔洞的解决办法

Solution of hole in hot core box running sand

1.1热芯盒制芯

1.1 core box core making

硬化快，生产率高，砂芯强度高，尺寸准确，表面光洁溃散性好，工艺简单，便于自动化，适合批量生产。由于热芯盒制芯的这些优点，我厂WD615机体水套芯就选用热芯盒射芯机作为车间的主要设备。射芯机投产后，对铸件质量和产量的提高作出了很大贡献。但随着产量的提高，一些制约砂芯质量和产量的问题也开始出现。芯盒的高使用率，设备问题，芯砂质量和操作者的操作水平等。造成热芯盒制芯生产中一些问题比较突出。如：芯盒跑砂使维修芯盒频率增加，对制芯生产和砂芯质量造成影响。在生产任务较紧时，一旦送修模具，还可能会造成整条生产线的停产。如何才能解决呢？经过长期观察，我任为芯盒跑砂是由于射砂时芯盒合模不严和排气不畅所致。

Fast hardening, high productivity, high sand core strength, accurate size, good surface collapsibility, simple process, easy automation, suitable for mass production. Because of the advantages of hot core box making, WD615 core water core of our plant is selected as the main equipment of the workshop. After the core machine was put into operation, it greatly contributed to the improvement of casting quality and output. But with the increase of production, some problems that restrict the quality and yield of sand core also begin to appear. The core box has high utilization rate, equipment problems, core sand quality and operator's operation level. There are some problems in the production of hot box core making. For example, the core box running sand increases the frequency of repair core box, which has an impact on the core production and core quality. When the production task is tight, once the mold is repaired, it may cause the whole production line to stop production. How can we solve it? After a long observation, I was running sand as the core box because of the poor mold clamping and poor ventilation.

1.2具体解决办法。

1.2 specific solutions.

工装合模不严时，调整工装或设备是完全能解决问题的。

When the tooling is not strict, adjusting the tooling or equipment can completely solve the problem.

射砂时，芯砂在高压砂气流作用下射进芯腔内，大部分气流从工装原有的排气塞或排气道内排出，一部分排出不及，必然从芯盒间隙大处排出，不久就使工装磨损。最直接的解决办法就是对磨损处进行焊补，但不能解决再次跑砂磨损芯盒。怎样才能彻底解决问题呢，于是我想到了加排气塞的办法。具体做法就是在靠近跑砂部位内平面加适量排气塞。如图A使易跑砂部位的余气全部排出。一次性修复改造，解决了芯盒跑砂问题，，减少了芯盒送修次数和维修成本。

In sand shooting, the core sand is ejected into the core cavity under the action of high pressure sand air flow. Most of the air flow is discharged from the original exhaust plug or exhaust duct in the tooling. Part of the discharge is less than that of the core box. The most direct solution is to weld and repair the worn parts, but it can not solve the core of running sand again. How to solve the problem thoroughly, so I thought of the way of adding an exhaust plug. The specific method is to add a suitable amount of exhaust plug to the surface of the sand near the running place. As in figure A, all the residual gas in the easy run sand part is discharged. The one-time repair and transformation has solved the problem of sand running in the core box, and reduced the repair times and maintenance costs of the core box.