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在釉面砖的生产过程中，无论是一次烧成还是二次烧成，坯釉裂纹是常见的质量缺陷之一。裂纹的种类多，产生原因复杂，解决方法也各异，生产技术人员对此并不陌生。小编在生产实践中时常发现，看似简单的裂纹，有时并没有明显的辨别特征，一线生产技术人员分析时容易产生误判；甚至在查明裂纹的产生原因后，却因为生产条件的限制，导致问题迟迟不能完全解决，造成生产成品率的下降。

In the production process of glazed tiles, whether it is fired once or twice, cracks in the glaze are one of the common quality defects. There are many types of cracks, complex causes, and various solutions, which are not unfamiliar to production technicians. In production practice, the editor often finds that seemingly simple cracks sometimes do not have obvious distinguishing features, and frontline production technicians are prone to misjudgment when analyzing them; Even after identifying the cause of the crack, the problem was delayed and could not be completely solved due to production conditions, resulting in a decrease in production yield.

根据山东釉面砖裂纹的形成原因，釉面砖的常见裂纹大致可分为以下三种：

According to the causes of cracks in Shandong glazed tiles, common cracks in glazed tiles can be roughly divided into the following three types:

一是机械碰撞裂纹，包括干压成型过程的脱模撞裂、翻坯机碰裂、橫线、平台及辊棒送砖过程造成的裂纹，等等。

One is mechanical collision cracks, including demolding collision cracks during the dry pressing forming process, billet flipping machine collision cracks, cracks caused by the horizontal line, platform, and roller bar feeding process, and so on.

二是烧成冷却过程出现的裂纹。此类裂纹较长，或有弧形裂、锯齿裂等外观特征。

The second is the cracks that appear during the firing and cooling process. This type of crack is longer, or has appearance characteristics such as arc-shaped or serrated cracks.

三是干燥过程的裂纹，即干燥工艺参数控制不合理，干燥收缩导致的裂纹，包括边裂、中心裂、面裂等。特别是砖边缘部分的细裂纹，有时裂纹深度只比釉层深一点点，烧成前不易发现，常被忽视。这种裂纹与干燥曲线、坯料配方、粉料工艺参数都有关系。

The third is the cracks during the drying process, which are caused by unreasonable control of drying process parameters and drying shrinkage, including edge cracks, center cracks, surface cracks, etc. Especially for the fine cracks on the edge of the brick, sometimes the crack depth is only slightly deeper than the glaze layer, which is difficult to detect before firing and is often overlooked. This type of crack is related to the drying curve, billet formula, and powder process parameters.

机械碰撞裂纹和冷却造成裂纹一般有明显的辨别特征，较易判断，而干燥导致的裂纹有时易与其它裂纹混淆，解决难度较大。

Mechanical collision cracks and cracks caused by cooling generally have obvious distinguishing features and are easy to determine, while cracks caused by drying are sometimes confused with other cracks and difficult to solve.

一般情况下，干燥裂纹的解决方法主要包括以下三方面：

In general, the solutions to dry cracks mainly include the following three aspects:

（1）坯料配方。控制干燥收缩较大的原料用量，在成型压力能满足生坯强度的情况下，尽量减少粘土类原料的比例。

(1) Blank formula. Control the amount of raw materials with high drying shrinkage, and minimize the proportion of clay materials while ensuring that the molding pressure can meet the strength of the green body.

（2）压制成型。改善粉料的颗粒级配，提高粉料的粗颗粒比例。

(2) Press forming. Improve the particle grading of the powder and increase the proportion of coarse particles in the powder.

（3）烘干窑炉。烘干窑的前段（加热阶段）保持“高温高湿”状态，中段（等速干燥阶段）要求热风不能过于干燥或潮湿，后段（降速干燥阶段）可采用窑尾冷却回收的热风。

(3) Drying kiln. The front section (heating stage) of the drying kiln should maintain a "high temperature and high humidity" state, while the middle section (constant speed drying stage) requires that the hot air should not be too dry or humid, and the rear section (reduced speed drying stage) can use the hot air recovered from the kiln tail cooling.

对于产品的干燥裂纹问题，在不同工厂的实践中，解决思路大致接近却又不尽相同。笔者分析认为，主要有以下几点需要注意。

In the practice of different factories, the solution to the problem of drying cracks in products is generally similar but not entirely the same. The author analyzes and believes that there are mainly the following points that need to be noted.

生产管理中，常把干燥裂纹误当作机械碰裂来处理，一味地增加坯料的粘土比例，提高粉料水分，以增加生坯强度，不但收效甚微，还会导致问题更加严重。所以，当出现裂纹时，建议生产管理人员详细分析裂纹的特征，总结裂纹出现的规律，是否与模具、压力机、进砖平台、烘干窑、主窑等环节有明确的相关性。更多相关内容就来我们网站//www.quanyouyou.com咨询吧！

In production management, dry cracks are often mistakenly treated as mechanical cracks, blindly increasing the clay ratio of the billet and increasing the moisture content of the powder to increase the strength of the green billet. This not only has little effect, but also leads to more serious problems. So, when cracks appear, it is recommended that production management personnel analyze the characteristics of the cracks in detail, summarize the rules of crack occurrence, and determine whether there is a clear correlation with links such as molds, presses, brick feeding platforms, drying kilns, and main kilns. For more related content, come to our website //www.quanyouyou.com Consult!