Due to the thin wall around the hot spot, it is impossible to establish an effective feeding channel. Due to the structure of the cylinder block, it is impossible to open the inner runner here. Therefore, the final consideration is to adjust the parting plan, with one end of...
After a series of air hole measures are verified to have no effect, re-examine the defect characteristics. After dissecting the bodies of several defective castings, it was found that the holes were not smooth, there were local unevenness and shrinkage casting defects. According to the three-dimensional diagram of the...
Since the external characteristics of casting defects are characterized by porosity, the following measures have been taken: (1) Reduce the gas generation of sand core. Extend the core baking time of the main core for 1 hour, the gas generation of the main core will decrease from 14.5 mL/g...
1. Modeling and core making process The sand-coated iron molding process is adopted, with the thickness of the sand-coated layer of 6~8 mm and a box of two pieces. The appearance is coated sand with low gas generation (gas generation is less than 14 mL/g). The core is made...
After the test verified that the fine grained molding sand is effective in preventing the sand adhesion of the cylinder block casting with the pulverized coal wet mold clay sand, the company also carried out the test of the pulverized coal free wet mold clay sand for the cylinder...
During the development of the cylinder block in the early stage, it was found that there was shrinkage defect at the oil channel position by dissecting the cylinder block, as shown in the figure. After reviewing the production process, it was found that when the content of molten iron...
1. Sand mold manufacturing The depth of the mold cavity is too deep during the processing of the outer mold of the cylinder block sand casting. In the three-dimensional design stage, the high-end surface of the side of the deep cavity of the mold is cut off to form...
Nodular cast iron piston rings are more and more widely used in various engines such as agricultural machinery, automobiles and cars, mini cars and motorcycles Φ one hundred and ten Φ one hundred and fifteen Φ 120 and other single cylinder diesel engines, 4 102, 4 105, 6 110,...
The sand core positioning structure adopted on the cylinder block lower core fixture is also diverse in production practice. Many factories provide the lower core fixture with accuracy and reliability as much as possible. Positioning blocks (or fast limit) are set around the “overall sand core” to prevent the...
The clamping mechanism of Cylinder Block Casting lower core clamp is also diverse in production practice, but according to the different motion principle of its clamping (clamping) plate (or block), it can be roughly divided into two types: rotary clamping structure (as shown in Figure 1) and flat moving...