Shandong Shengya Machinery Co., Ltd. specializing in the production of various types of brick, brick machine, brick machine, hollow brick, pavement brick and other equipment of the old brick factory.
      Hollow block cement brick production, often generated when the extrusion of various defects, defect causes a variety of reasons for each defect varies, to analyze its causes and try to defense. Here's what the cause of this defect causes and prevention measures:
1. Mud rotten corner
Sophisticated corners of mud cracks appear, cleft turned back. The main reason is the middle of the mud extrusion speed, one can head to the central core of the core with a longer, or in the middle of the back of the mandrel core head cover some resistance mud tubes to reduce the amount of the middle into the mud; the second is increased machine-feed end of the four corners of the arc, in order to expand into the mud around.
2. Mud rotten heart
Clay center blossom, rolled around to squeeze machine clay obvious bulge in the middle. Mainly in the middle of the mud extrusion machine speed. One can put the central core of the core with elongated head, or the back of the head in the middle of the core mandrel set period of resistance into the mud mud tubes to reduce the amount of the middle; the second is to increase machine-feed end of the four corners of the arc, to expand into the mud around.
3. bent clay
First, when the clay extruder outlet are bent to one side, while thick brick outer walls, while thin. The main reason is the machine mouth, core tools, mud-cylinder and spiral reamer not on the same center, should be corrected. Second, clay zigzag forward, sunken areas are sometimes pulled bad. The main reason is the brick extrusion machine spiral reamer main leaf and top deputy leaves missing, or vice leaf badly worn respond spiral reamer main lobe and secondary leaf for repair or replacement.
The clay deformation
Mainly because of insufficient strength clay, forming water is too high, the water is adjusted to deal with molding.
5. Transverse broken clay crack
Transverse rupture caused by clay for two main reasons. First, forming water is too low, the water is adjusted to deal with molding; the second is too low plasticity index of raw materials, processing of raw materials should be strengthened, such as reducing the size of the material broken, increase the aging time of the feedstock, the raw material grinding mill and so on in order to improve the plasticity index of raw materials.
6. Clay jagged crack
Resulting in jagged crack the following main reasons. First, the machine at the corner of the mouth of the second layer on one or both sides of the gap is too large waterway, excessive lubrication water to produce water teeth crack; the second is machine last two dry mouth, excessive water front layer again, water is generated large teeth crack; the third is just around the corner from the second layer machine dry mouth, resulting in dry crack teeth; four is around the corner all layers of water, it will produce anhydrous large teeth crack; Fourth Corner All of the layers of water, it will produce anhydrous large teeth crack. It should be based on the specific circumstances, according to the appropriate location adjustment waterways.
7. Deformation of mud holes
First, narrow hole, core head may be badly worn or indentation machine mouth too much and should be replaced or adjusted. Second, the shift hole, core rod may be skewed or too thin, it should align the stem or replacement. Third, the individual intermediate hole blossom, pulls out to the surrounding. The reason is that the bulk of the plane of the core head is outside the mouth of the mud flat machine side, the application of the core head pressed into the nut a little. Fourth hole collapse deformation, because the mud was too soft, adjust the shape of water.
8. Clay holes occur within the scale crack
The first crack appeared in almost all the holes, the main reason is the core head surface rough or poorly designed taper inappropriate, surrounded resistance a serious imbalance, or pug too dry, too hard caused. Second, only a few holes appear, then just a matter of the core head should be ground smooth or modify core head design.
9. Two top surface longitudinal cracks clay
Resulting in both the top surface of mud longitudinal cracks (core frame cracks) mainly due to a combination of adverse secondary mud. In order to ensure the second clay material with good, strong frame to prevent core pattern, it should make a big blade end of the core to the mouth of the exit plane of the machine there is a reasonable length, the "healing length." Healing increased length should be randomly opening net amount of mud and longer, plasticity index difference of raw healing length should be longer.
10. Clay intermediate recess
Extruded clay obvious intermediate recess. Mainly middle mud caused by the slow extrusion machine. It may be appropriate to the head of the central core of the core with the shortened, or reduced resistance of mud in the middle of the cone to increase the amount of the middle into the mud.
Shandong Shengya Machinery Co., Ltd. has been committed cement products machinery development, production and sale of advanced equipment, superb technical expertise and two decades of experience, the company has always been at the forefront of research and development center block molding machine market development Follow the advanced technology at home and abroad, to develop products for different investment needs of users, mainly block making machine, hydraulic tile machine, cement pipe machine, mixer, hanging roller machine, telephone poles machine equipment. At present the country with 19 offices and six overseas plants (Nigeria, Tanzania, Algeria, Kenya, Mozambique, Ethiopia) and exported more than 100 countries and regions.