CN115319023A - Process method for resin sand modeling art casting - Google Patents

Abstract

The invention belongs to the technical field of art casting, and discloses a resin sand modeling art casting process method, which comprises the following steps: i, preparing a section mould a, II, preparing a section mould b, and III, moulding the section mould a and the section mould b according to a positioning line and then pouring; the resin sand modeling art casting process is finished. The process provided by the invention is a process method for researching a free-form welding frame, a flaskless modeling and a runner arrangement in specific production practice, greatly improves the arrangement speed and quality of the runner, is scientific, convenient, time-saving, labor-saving, energy-saving and environment-friendly, is beneficial to casting and forming, and improves the quality of artistic castings.

Description

Resin sand modeling art casting process method

Technical Field

The invention belongs to the technical field of art casting, and particularly relates to a resin sand modeling art casting process method.

Background

The resin sand mold molding process is a main process for production and application of large-scale parts in the art casting industry at present, and generally adopts the molding manufacture of a welding sand box. However, the artistic piece is different from an industrial piece and is mostly an irregular block, so that the arrangement of the pouring gate and the coating of the pouring gate are not easy to operate, time and labor are wasted, and once the arrangement of the pouring gate is unscientific, the quality of a casting is influenced.

Disclosure of Invention

The invention aims to provide a process method for resin sand modeling art casting, which is scientific, convenient, time-saving, labor-saving, energy-saving and environment-friendly, is beneficial to casting and forming and improves the quality of art castings.

The invention is realized by adopting the following technical scheme:

a process method for resin sand modeling art casting comprises the following steps:

i preparation of Pattern a

And (1) designing and manufacturing a model of the artwork according to requirements, wherein the material is glass fiber reinforced plastic or gypsum. And (3) parting the glass fiber reinforced plastic or gypsum model to be molded after measuring data, cutting the glass fiber reinforced plastic or gypsum model according to the blocks, reinforcing the blocks which are easy to deform or damage, and then preparing a resin sand mold.

Step (2), after the glass fiber reinforced plastic or gypsum model blocks enter a workshop, placing wood bricks or boards around the model according to the shape of the model blocks, wherein the height of the wood bricks or boards is the height of the sand mold and is 20 to 25cm higher than the molded surface part of the glass fiber reinforced plastic or gypsum model blocks, and the thickness of the manufactured sand mold is 20 to 25cm; the design of a pouring gate is considered while arranging the wooden bricks or boards, the horizontal pouring gate and the auxiliary pouring gate adopt a rain type pouring flow guide, multiple points enter along the wall, and the air exhaust is smooth; the pouring cup is required to protrude out of the molded surface part by 20 to 25cm;

step (3), welding a steel structure net rack along with the shape of the top surface of the glass fiber reinforced plastic or gypsum model block, and placing the steel structure net rack above the wooden brick or board;

step (4), according to the diameter of the required pouring gate, adopting a corresponding plastic pipe, according to the design, placing the plastic pipe with the pre-embedded design requirement on the back of the model block in the space where the wooden brick or the wooden board is reasonably arranged, and completing the pre-arrangement of the pouring gate of the complicated and thick sand core;

step (5), making a resin sand mold; the adding amount of the resin is 1.5 percent of the mass of the sand, the adding amount of the curing agent is 40 to 70 percent of the mass of the resin, and the resin sand mold is manufactured by fully stirring the mixture by an automatic sand mixer;

step (6), drawing out the pre-buried plastic pipe after the resin sand mold is manufactured for 30 to 35 minutes;

step (7), after 2 hours, completely solidifying the resin sand mold, and then finishing a pouring gate by using an air hammer;

step (8), after finishing, cleaning floating sand in the pouring gate by using a high-pressure air gun;

step (9), after floating sand is cleaned, coating paint in a pouring channel by adopting a method of combining flow coating and spraying;

step (10), adopting a steel structure net rack on a resin sand mould of a lifting hook of lifting equipment to a specified place for standby;

II, preparation of section mould b: repeating the steps (1) to (10);

and III, the section mould a and the section mould b are molded according to the positioning line and then poured.

The invention has reasonable design, wide application range for manufacturing large bronze artwork and good practical application value.

Detailed Description

The following provides a detailed description of specific embodiments of the present invention.

A process method for resin sand modeling art casting comprises the following steps:

i preparation of Pattern a

And (1) designing and manufacturing a model of the artwork according to requirements, wherein the material is glass fiber reinforced plastic or gypsum. And (3) parting the glass fiber reinforced plastic or gypsum model to be molded after measuring data, cutting according to the blocks, reinforcing the blocks which are easy to deform or damage, and then manufacturing a resin sand mold.

And (2) after the glass fiber reinforced plastic or gypsum model block enters a workshop, placing wood bricks or boards around the model block according to the shape of the model, wherein the height of the wood bricks or boards is the height of the sand mold and is 20 to 25cm higher than the molded surface part of the glass fiber reinforced plastic or gypsum model block, and the thickness of the manufactured sand mold is 20 to 25cm. The design of a pouring gate and the principle of pouring gate arrangement are considered while arranging the wooden bricks or boards, the pouring gate is reasonably designed according to the shape of the block, and a horizontal pouring gate and an auxiliary pouring gate generally adopt a rain pouring type for flow guiding, multiple points enter along the wall, and the exhaust is smooth; the sprue cup is required to protrude out of the molded surface part by 20 to 25cm when reaching a certain height.

And (3) welding a steel structure net rack along with the shape of the top surface of the glass fiber reinforced plastic or gypsum model block, and placing the steel structure net rack above the wooden brick or the wooden board.

And (4) adopting corresponding plastic pipes according to the diameter of the required pouring gate, and placing the plastic pipes with pre-embedded design requirements on the back of the model block in a space where the wooden bricks or the wooden boards are reasonably arranged according to the design to complete the pre-arrangement of the pouring gate of the complex and thick sand core.

Step (5), making a resin sand mold; the adding amount of the resin is 1.5 percent of the mass of the sand, the adding amount of the curing agent is 40 to 70 percent of the mass of the resin, and the resin sand mold is manufactured by fully stirring the mixture by an automatic sand mixer.

And (6) extracting the pre-buried plastic pipe after the resin sand mold is manufactured for 30 to 35 minutes.

And (7) after 2 hours, completely solidifying the resin sand mold, and finishing the pouring gate by using an air hammer and the like.

And (8) after finishing, cleaning floating sand in the pouring channel by using a high-pressure air gun.

And (9) after floating sand is cleaned, coating the pouring channel with the coating by adopting a method combining flow coating and spraying.

And (10) adopting a steel structure net rack on the resin sand mould of the lifting hook of the lifting equipment to a specified place for standby.

II, preparation of section mould b: and (5) repeating the steps (1) to (10).

III, the section mould a and the section mould b are molded according to a positioning line and then poured; the resin sand modeling art casting process is completed.

Generally, a large artistic casting is divided into a plurality of parts, and the parts are welded and assembled into a whole after being cast respectively.

The concrete raw materials are selected as follows:

1) The resin is selected from FNa-1 furan resin produced in Henan, and the performance of the resin is detected as follows:

2) The curing agent is 04# curing agent produced in Henan, and the performance of the curing agent is detected as follows:

3) The paint is HLT-I paint produced in Henan, and the performance of the paint is detected as follows:

note: 2h of suspended matter, namely the suspended matter proportion is 0.7 percent after standing for 2 hours.

4) The sand for modeling is selected from natural quartz scouring sand, and the comprehensive physical and chemical properties are as follows:

note: 50/100 refers to the concentration ratio of the sand with the granularity of 50-100 meshes.

The process of the invention researches a process method for setting the pouring gate along with the welding frame, the flaskless modeling and the production practice, greatly improves the setting speed and the quality of the pouring gate, is scientific, convenient, time-saving and labor-saving, saves energy and protects environment, is beneficial to casting and molding and improves the quality of castings.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.

Claims (2)

1. A resin sand modeling art casting process method is characterized in that: the method comprises the following steps:

i preparation of Pattern a

Step (1), designing and manufacturing a model of an artwork according to requirements, wherein the material is glass fiber reinforced plastic or gypsum; after measuring data, parting the glass fiber reinforced plastic or gypsum model to be molded, cutting the glass fiber reinforced plastic or gypsum model according to blocks, reinforcing the blocks which are easy to deform or damage, and then manufacturing a resin sand mold;

step (2), after the glass fiber reinforced plastic or gypsum model block enters a workshop, placing wood bricks or boards around the model block according to the shape of the model, wherein the height of the wood bricks or boards is the height of the sand mold and is 20 to 25cm higher than the molded surface part of the glass fiber reinforced plastic or gypsum model block, and the thickness of the manufactured sand mold is 20 to 25cm; the design of a pouring gate is considered while arranging the wooden bricks or boards, the horizontal pouring gate and the auxiliary pouring gate adopt a rain type pouring flow guide, multiple points enter along the wall, and the air exhaust is smooth; the pouring cup is required to protrude out of the molded surface part by 20 to 25cm;

step (3), welding a steel structure net rack along with the shape of the top surface of the glass fiber reinforced plastic or gypsum model block, and placing the steel structure net rack above the wooden brick or board;

step (4), according to the diameter of the required pouring gate, adopting a corresponding plastic pipe, according to the design, placing the plastic pipe with pre-embedded design requirements on the back of the model block in a space where the wooden brick or the wooden board is reasonably arranged, and completing the pre-arrangement of the pouring gate of the complex and thick sand core;

step (5), making a resin sand mold; the adding amount of the resin is 1.5 percent of the mass of the sand, the adding amount of the curing agent is 40-70 percent of the mass of the resin, and the resin sand mold is manufactured by fully stirring the mixture by an automatic sand mixer;

step (6), drawing out the pre-buried plastic pipe after the resin sand mold is manufactured for 30 to 35 minutes;

step (7), after 2 hours, completely solidifying the resin sand mold, and then finishing the pouring gate by using an air hammer;

step (8), after finishing, cleaning floating sand in the pouring gate by using a high-pressure air gun;

step (9), after floating sand is cleaned, coating paint in a pouring channel by adopting a method of combining flow coating and spraying;

step (10), adopting a steel structure net rack on a lifting equipment hook resin sand mould to a specified place for standby;

II, preparation of section mould b: repeating the steps (1) to (10);

and III, the section mould a and the section mould b are molded according to the positioning line and then poured.

2. The process method for casting resin sand molding art according to claim 1, characterized in that: the sand for modeling is natural quartz scouring sand.