阅读说明：本技术 一种铸件树脂砂清砂方法 (Sand cleaning method for casting resin sand ) 是由 邹彩花 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种铸件树脂砂清砂方法,所述铸件树脂砂清砂方法包括以下步骤：步骤一,将铸件从砂箱取出。初步冷却后通过自动清砂装置扫除表面砂砾；步骤二,使用高压气吹装置对铸件内部不规则面的表面进行初步清理；步骤三,铸件高温退火；步骤五,退火结束,待铸件冷却至常温后清除余砂。通过上述方式,本发明能够有效去除铸件表面粘附的的残留树脂。(The invention discloses a sand removing method for casting resin sand, which comprises the following steps: step one, taking out the casting from the sand box. After primary cooling, sweeping away surface gravel through an automatic sand cleaning device; secondly, preliminarily cleaning the surface of the irregular surface in the casting by using a high-pressure air blowing device; step three, annealing the casting at high temperature; and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature. Through the mode, the residual resin adhered to the surface of the casting can be effectively removed.)

1. The casting resin sand cleaning method is characterized by comprising the following steps:

step one, taking out the casting from the sand box.

2. After primary cooling, sweeping away surface gravel through an automatic sand cleaning device;

secondly, preliminarily cleaning the surface of the irregular surface in the casting by using a high-pressure air blowing device;

step three, annealing the casting at high temperature;

and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature.

3. The method for cleaning the resin sand of the casting according to claim 1, wherein the method for cleaning the residual sand in the step five is to firstly shake the casting to pour out the residual sand of the irregular inner surface and then clean the inner surface and the outer surface by using a high-pressure air blowing device.

4. The casting numerical yarn sand removal method according to claim 1, wherein the method for removing the residual sand in the step five is sand removal by water washing.

5. A method for cleaning resin sand from castings according to claim 2, characterized in that the water washing method is surface washing using a high pressure water gun.

6. The method of claim 1, wherein the casting annealing temperature is 500 ℃ to 550 ℃.

7. The sand removing method for the resin sand of the casting according to claim 1, wherein the annealing and heat preservation time is 3-5 hours.

Technical Field

The invention relates to the field of casting methods, in particular to a resin sand cleaning method.

Background

The resin sand is molding sand or core sand in which synthetic resin is used as a binder of sand grains. After a mold or core is made of resin sand, the resin is cured by an irreversible crosslinking reaction by the action of a curing agent, thereby imparting necessary strength to the mold or core. Resin sand has high strength after hardening, is particularly suitable for machine molding, and can be used for manufacturing complex and thin-walled castings, so that the development is widely carried out in recent years, but after the casting by using the resin sand molding is finished, resin components are adhered to the surface of the molded casting, and the adhered components are difficult to remove by using a cleaning mode and need to be manually removed.

Disclosure of Invention

The invention mainly solves the technical problem of providing a sand cleaning method, which can solve the problem of resin sand adhesion.

In order to solve the technical problems, the invention adopts a technical scheme that: the casting resin sand cleaning method comprises the following steps:

step one, taking out the casting from the sand box. After primary cooling, sweeping away surface gravel through an automatic sand cleaning device;

secondly, preliminarily cleaning the surface of the irregular surface in the casting by using a high-pressure air blowing device;

step three, annealing the casting at high temperature;

and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature.

In a preferred embodiment of the invention, the method for removing the residual sand in the fifth step is to firstly shake the casting to pour out the residual sand on the irregular surface inside, and then use a high-pressure air blowing device to clean the inner surface and the outer surface.

In a preferred embodiment of the present invention, the method for removing the remaining sand in the fifth step is sand removal by water washing.

In a preferred embodiment of the present invention, the sand removal by water washing is surface washing by using a high pressure water gun.

In a preferred embodiment of the invention, the annealing temperature of the casting is 500-550 ℃.

In a preferred embodiment of the present invention, the annealing and heat-preserving time is 3 to 5 hours.

The invention has the beneficial effects that: the technical scheme includes that firstly, the formed casting is subjected to primary sand removal, most of sand grains on the surface are removed, then the heat treatment step after the casting is formed is utilized, the residual resin adhered to the surface of the casting is heated by an annealing program, then the sand removal treatment is further performed after the annealing is finished, on one hand, the casting program does not need to be attached in the whole process, a new treatment method does not need to be introduced, the existing production line does not need to be changed, and on the other hand, the influence of the adhered resin can be effectively removed.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

The embodiment of the invention comprises the following steps:

a sand removing method for casting resin sand comprises the following steps:

step one, taking out the casting from the sand box. After primary cooling, sand grains on the surface are swept by an automatic sand cleaning device, and large blocks of sand grains remained on the surface of the casting can be removed rapidly in a primary mode;

secondly, the surface of the irregular surface in the casting is preliminarily cleaned by using a high-pressure air blowing device, and the position with difficult processing of surface scraping can be processed by using a high-pressure air blowing mode at a high speed;

thirdly, annealing the casting at high temperature, wherein the high-temperature annealing step can dry the resin component remained on the surface of the casting into ash without adhesion through high heat;

and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature.

And D, firstly shaking the casting to pour out the residual sand on the irregular surface inside, and then cleaning the inner surface and the outer surface by using a high-pressure air blowing device, so that ash in the casting can be thoroughly removed.

The annealing temperature of the casting is 520 +/-10 ℃, the annealing heat preservation time is 5 hours, the internal graphitization of the casting can be caused due to the overhigh annealing temperature, the hardness and the strength are reduced, and if the heat preservation time is too short, the insufficient stress release can be easily caused, and the internal defects of the casting can be caused.

In another embodiment of the present invention, the substrate is,

a sand removing method for casting resin sand comprises the following steps:

step one, taking out the casting from the sand box. After primary cooling, sand grains on the surface are swept by an automatic sand cleaning device, and large blocks of sand grains remained on the surface of the casting can be removed rapidly in a primary mode;

secondly, the surface of the irregular surface in the casting is preliminarily cleaned by using a high-pressure air blowing device, and the position with difficult processing of surface scraping can be processed by using a high-pressure air blowing mode at a high speed;

thirdly, annealing the casting at high temperature, wherein the high-temperature annealing step can dry the resin component remained on the surface of the casting into ash without adhesion through high heat;

and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature.

And the method for removing the residual sand in the fifth step is to use a high-pressure water gun to wash the surface, so that ash on the inner surface and the outer surface of the casting can be thoroughly removed.

The annealing temperature of the casting is 520 +/-10 ℃, the annealing heat preservation time is 5 hours, the internal graphitization of the casting can be caused due to the overhigh annealing temperature, the hardness and the strength are reduced, and if the heat preservation time is too short, the insufficient stress release can be easily caused, and the internal defects of the casting can be caused.

In yet another embodiment:

a sand removing method for casting resin sand comprises the following steps:

step one, taking out the casting from the sand box. After primary cooling, sand grains on the surface are swept by an automatic sand cleaning device, and large blocks of sand grains remained on the surface of the casting can be removed rapidly in a primary mode;

secondly, the surface of the irregular surface in the casting is preliminarily cleaned by using a high-pressure air blowing device, and the position with difficult processing of surface scraping can be processed by using a high-pressure air blowing mode at a high speed;

thirdly, annealing the casting at high temperature, wherein the high-temperature annealing step can dry the resin component remained on the surface of the casting into ash without adhesion through high heat;

and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature.

And D, firstly shaking the casting to pour out the residual sand on the irregular surface inside, and then cleaning the inner surface and the outer surface by using a high-pressure air blowing device, so that ash in the casting can be thoroughly removed.

The annealing temperature of the casting is 540 +/-10 ℃, the annealing heat preservation time is 3 hours, the internal graphitization of the casting can be caused due to the overhigh annealing temperature, the hardness and the strength are reduced, and if the heat preservation time is too short, the insufficient stress release can be easily caused, and the internal defects of the casting can be caused.

In yet another embodiment:

a sand removing method for casting resin sand comprises the following steps:

step one, taking out the casting from the sand box. After primary cooling, sand grains on the surface are swept by an automatic sand cleaning device, and large blocks of sand grains remained on the surface of the casting can be removed rapidly in a primary mode;

secondly, the surface of the irregular surface in the casting is preliminarily cleaned by using a high-pressure air blowing device, and the position with difficult processing of surface scraping can be processed by using a high-pressure air blowing mode at a high speed;

thirdly, annealing the casting at high temperature, wherein the high-temperature annealing step can dry the resin component remained on the surface of the casting into ash without adhesion through high heat;

and step five, after annealing is finished, removing residual sand after the casting is cooled to normal temperature.

And the method for removing the residual sand in the fifth step is to use a high-pressure water gun to wash the surface, so that ash on the inner surface and the outer surface of the casting can be thoroughly removed.

The annealing temperature of the casting is 540 +/-10 ℃, the annealing heat preservation time is 4h, the internal graphitization of the casting can be caused due to the overhigh annealing temperature, the hardness and the strength are reduced, and if the heat preservation time is too short, the insufficient stress release can be easily caused, and the internal defects of the casting can be caused.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.