Water suffocating hole-free casting process for cylinder cover of single cylinder diesel engine and sand core for casting process

Abstract

The invention discloses a water suffocating hole-free casting process for a cylinder cover of a single cylinder diesel engine and a sand core for the casting process. The casting process comprises the following steps: 1, manufacturing an upper mold, a lower mold and the sand core, and coating the outer surface of the sand core with a low-gas-evolution coating; 2, manufacturing a core support, and mounting the core support at the gravity position on the upper plane of the sand core, wherein a gas discharging hole is formed in the center of the core support, the lower half part of the core support is arranged in the sand core, and the gas discharging hole in the center of the core support is communicated with the sand core to discharge gas in the sand core; 3, arranging waterway feet on the bottom surface of the sand core, and mounting gas discharging needles for discharging gas on the waterway feet and into the sand core; 4, mounting the sand core in the lower mold, and closing the upper mold to enable the inner surface of the upper mold to be attached to the upper plane of the core support; and 5, casting molten iron into the upper mold and the lower mold which are closed by virtue of a casting head. The positioning function of an original water suffocating hole is achieved by the core support, so that the process is simplified, the production efficiency is improved, and a great amount of time and fund investment are saved.

Description

technical field

[0001] The invention relates to a casting process for a cylinder head of a single-cylinder diesel engine with no water and stuffy holes and a used sand core. Background technique

[0002] The existing single-cylinder diesel cylinder head casting process mostly adopts the casting process with water-filled holes. The water-filled hole core mainly plays the role of positioning, exhaust, and sand production in casting, and has been used for many years in actual production. The technology is also relatively mature. But there are still some disadvantages, because after increasing the water hole, the two processes of water hole processing and water pressure cover are correspondingly increased, and in the process of using the diesel engine, water leakage often occurs due to the water hole cover falling off, especially in the diesel engine. Water-filled covers in coastal areas are prone to rust. At the same time, two processes of rough reaming and fine reaming are re...

Examples

Embodiment Construction

[0015] The present invention will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0016] A casting process for the cylinder head of a single-cylinder diesel engine without water and stuffy holes, which has the following steps: 1. Making an upper mold, a lower mold and a sand core, and coating the outer surface of the sand core with a coating with low gas generation; 2. Making a center with The core support 4 of the vent hole, install the core support 4 at the center of gravity of the upper plane of the sand core, place the lower half of the core support 4 in the sand core, and the vent hole 45 in the center of the core support 4 is connected with the sand core to discharge the sand core Internal gas; 3. Water chann...

technical field

[0001] The invention relates to a casting process for a cylinder head of a single-cylinder diesel engine with no water and stuffy holes and a used sand core. Background technique

[0002] The existing single-cylinder diesel cylinder head casting process mostly adopts the casting process with water-filled holes. The water-filled hole core mainly plays the role of positioning, exhaust, and sand production in casting, and has been used for many years in actual production. The technology is also relatively mature. But there are still some disadvantages, because after increasing the water hole, the two processes of water hole processing and water pressure cover are correspondingly increased, and in the process of using the diesel engine, water leakage often occurs due to the water hole cover falling off, especially in the diesel engine. Water-filled covers in coastal areas are prone to rust. At the same time, two processes of rough reaming and fine reaming are re...

Examples

Embodiment Construction

[0015] The present invention will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0016] A casting process for the cylinder head of a single-cylinder diesel engine without water and stuffy holes, which has the following steps: 1. Making an upper mold, a lower mold and a sand core, and coating the outer surface of the sand core with a coating with low gas generation; 2. Making a center with The core support 4 of the vent hole, install the core support 4 at the center of gravity of the upper plane of the sand core, place the lower half of the core support 4 in the sand core, and the vent hole 45 in the center of the core support 4 is connected with the sand core to discharge the sand core Internal gas; 3. Water chann...

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