阅读说明：本技术 底注式浇注系统及制备工艺 (Bottom pouring type pouring system and preparation process ) 是由 储德芝 杜应流 张年玉 张传书 胡存友 田彬 于 2020-12-23 设计创作，主要内容包括：本发明公开了底注式浇注系统,包括型壳、型壳的上端连接冒口,型壳的下端连接横浇道,横浇道的端部连接过滤网座,过滤网座与直浇道连接,过滤网座为空心敞口状,过滤网座内插接过滤网,过滤网座靠近直浇道的一侧上侧连接集渣包,过滤网座的敞口处插接网座堵头,并公开了该浇注系统的制备工艺,包括蜡模组树、制壳；去除过滤网座侧面耐火材料、在网座堵头蜡模表面涂抹内火材料；焙烧脱蜡；过滤网座插接过滤网,晾晒干燥存储；本发明在过滤网座一侧设置集渣包,钢水流经过滤网前将渣滓上浮聚集到集渣包里,未聚集的细小的渣滓通过过滤网过滤,保证进入铸件部分的钢水纯净,大大提高了铸件质量,降低了废品率。(The invention discloses a bottom pouring type pouring system, which comprises a shell, wherein the upper end of the shell is connected with a riser, the lower end of the shell is connected with a cross gate, the end part of the cross gate is connected with a filter screen seat, the filter screen seat is connected with a sprue, the filter screen seat is hollow and open, a filter screen is inserted in the filter screen seat, the upper side of one side, close to the sprue, of the filter screen seat is connected with a slag collecting bag, and the open part of the filter screen seat is inserted with a screen seat plug; removing the refractory material on the side surface of the filter screen seat, and smearing the internal fire material on the surface of the wax mould of the screen seat plug; roasting and dewaxing; the filter screen seat is inserted with a filter screen, and the filter screen is dried and stored; according to the invention, the slag collecting bag is arranged on one side of the filter screen seat, the slag is floated and collected in the slag collecting bag before the molten steel flows through the filter screen, and the non-collected fine slag is filtered by the filter screen, so that the purity of the molten steel entering a casting part is ensured, the quality of the casting is greatly improved, and the rejection rate is reduced.)

1. The bottom pouring type pouring system comprises a shell, wherein a riser is connected to the upper end of the shell, and the bottom pouring type pouring system is characterized in that: the lower extreme of shell is connected the cross gate, the end connection filter screen seat of cross gate, the filter screen seat is connected with the sprue, the filter screen seat is the hollow open form, peg graft the filter screen in the filter screen seat, the filter screen seat is close to one side upside connection collection cinder ladle of sprue, the open mouth department of filter screen seat pegs graft the screen seat end cap.

2. The bottom gating system of claim 1, wherein: the opening of the filter screen seat is arranged on the side surface.

3. The bottom gating system of claim 1, wherein: the net seat plug is in a prismatic table shape and is provided with a small opening close to the opening of the filter screen seat.

4. The bottom gating system of claim 1, wherein: the casting shell, the riser, the cross gate, the filter screen seat, the sprue and the slag ladle are arranged integrally, and the screen seat plug and the filter screen seat are arranged in a separated mode.

5. The bottom gating system of claim 1, wherein: the lower end of one side of the slag collecting bag close to the filter screen seat is arranged into an opening shape and is communicated with the filter screen seat.

6. A preparation process of the bottom pouring type gating system according to any one of claims 1 to 5, wherein the preparation process comprises the following steps: comprises the following steps of (a) carrying out,

step one, respectively connecting the upper end and the lower end of a casting wax mold with a riser wax mold and a cross gate wax mold group tree, adhering one end of a filter screen seat wax mold with a port of the cross gate wax mold by using a hot melt adhesive, and adhering a slag-collecting wax-covering mold to the other side edge of the filter screen seat wax mold by using the hot melt adhesive to form an integral module;

step two, manufacturing a shell of the integral module in the step one, wiping off each layer of refractory material on the side end face of the filter screen seat during shell manufacturing, and smearing the refractory material on an inner cavity of the filter screen seat close to the wax mould of the screen seat plug;

step three, roasting and dewaxing the integral module in the step two to enable the filter screen seat to form a cavity type shell with an opening;

step four, cooling the integral module subjected to dewaxing in the step three to room temperature, inserting a filter screen on the filter screen seat before casting, and inserting a screen seat plug into an opening of the filter screen seat;

and step five, airing, drying, storing and pouring the integral structure in the step four for later use.

7. The bottom gating system of claim 6, wherein: and in the second step, the shell manufacturing procedure is to prepare slurry by adopting mullite powder and silica sol in a ratio of 1:4, stick the slurry on the surface of the integral model, scatter mullite sand on the surface of the integral module stuck with the slurry, remove the sand slurry on the end surface of the filter screen seat after sanding, put the integral module stuck with the slurry and scattered with sand in a fan with a wind speed of 1-3m/s for air drying, make the next layer after drying, and repeat the procedures to make 5-7 layers.

8. The bottom gating system of claim 6, wherein: and in the fourth step, a layer of adhesive is coated on the peripheral matching surface of the screen seat plug, and then the adhesive is rapidly inserted into the opening of the filter screen seat and is pressed tightly.

Technical Field

The invention relates to the technical field of precision casting, in particular to a bottom pouring type pouring system and a preparation process thereof.

Background

The existing precision casting bottom pouring type pouring system adopts a vertical filter screen, two sides of a filter screen seat are directly connected with a cross gate, when the process is applied, molten steel and slag in the molten steel flow through the filter screen, meshes of the filter screen are easily stuck by large slag inclusion, and the rest molten steel is difficult to flow through the filter screen smoothly, so that casting pouring is insufficient, cold shut is caused, and the defect rejection rate is high.

Disclosure of Invention

The invention mainly aims to provide a bottom pouring type pouring system and a preparation process, wherein a slag collecting bag is arranged on one side of a filter screen seat, molten steel floats upwards to be collected in the slag collecting bag before flowing through a filter screen, and non-collected fine slag is filtered through the filter screen, so that the purity of the molten steel entering a casting part is ensured, the quality of the casting is greatly improved, the rejection rate is reduced, and the problems in the background technology can be effectively solved.

In order to achieve the purpose, the invention adopts the technical scheme that: the bottom pouring type pouring system comprises a shell, a riser is connected to the upper end of the shell, a cross runner is connected to the lower end of the shell, a filter screen seat is connected to the end portion of the cross runner, the filter screen seat is connected with a sprue, the filter screen seat is hollow and open, a filter screen is inserted into the filter screen seat, a slag collecting bag is connected to the upper side of one side, close to the sprue, of the filter screen seat, and a plug screen seat plug is inserted into the open of the filter screen seat.

Preferably, the opening of the filter screen seat is arranged on the side surface.

Preferably, the net seat plug is in a prismatic table shape and is provided with a small opening close to the opening of the filter net seat.

Preferably, the shell, the riser, the cross gate, the filter screen seat, the sprue and the slag collecting ladle are integrally arranged, and the screen seat plug is separated from the filter screen seat.

Preferably, the lower end of one side of the slag collecting bag close to the filter screen seat is open and communicated with the filter screen seat.

The preparation process of the bottom pouring type pouring system comprises the following steps: the method comprises the following steps:

step one, respectively connecting the upper end and the lower end of a casting wax mold with a riser wax mold and a cross gate wax mold group tree, adhering one end of a filter screen seat wax mold with a port of the cross gate wax mold by using a hot melt adhesive, and adhering a slag-collecting wax-covering mold to the other side edge of the filter screen seat wax mold by using the hot melt adhesive to form an integral module;

step two, manufacturing a shell of the integral module in the step one, wiping off each layer of refractory material on the side end face of the filter screen seat during shell manufacturing, and smearing the refractory material on an inner cavity of the filter screen seat close to the wax mould of the screen seat plug;

step three, roasting and dewaxing the integral module in the step two to enable the filter screen seat to form a cavity type shell with an opening;

step four, cooling the integral module subjected to dewaxing in the step three to room temperature, inserting a filter screen on the filter screen seat before casting, and inserting a screen seat plug into an opening of the filter screen seat;

and step five, airing, drying, storing and pouring the integral structure in the step four for later use.

Preferably, in the shell making process in the second step, mullite powder and silica sol in a ratio of 1:4 are prepared into slurry, the surface of the integral model is adhered with the slurry, mullite sand is scattered on the surface of the integral module adhered with the slurry, the sand slurry on the end face of the filter screen seat is removed after the sand is scattered, the integral module adhered with the slurry and scattered with the sand is placed in front of a fan with the wind speed of 1-3m/s for air drying, the next layer is made after the drying, and the processes are repeated to make 5-7 layers.

Preferably, in the fourth step, a layer of adhesive is coated on the peripheral matching surface of the screen seat plug, and then the adhesive is rapidly inserted into the opening of the filter screen seat and is pressed tightly.

During specific implementation, molten steel is poured from an inlet of the sprue, dross in the molten steel is gathered on the dross collecting bag, the molten steel enters the casting body through the filter screen to be high-quality and pure molten steel, and the filter screen cannot be pasted by the dross to cause insufficient pouring and cold insulation defects.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the slag collecting bag is arranged on one side of the filter screen seat, the slag is floated and collected in the slag collecting bag before the molten steel flows through the filter screen, and the non-collected fine slag is filtered by the filter screen, so that the purity of the molten steel entering a casting part is ensured, the quality of the casting is greatly improved, and the rejection rate is reduced.

Drawings

FIG. 1 is a schematic view of the gating system of the present invention;

fig. 2 is a schematic view of the connection between the filter screen seat and the screen seat plug of the present invention.

In the figure: 1. a sprue; 2. collecting a slag ladle; 3. a filter screen; 4. a filter screen seat; 5. a cross gate; 6. molding a shell; 7. a riser; 8. the net seat is plugged.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-2, the bottom pouring type gating system comprises a shell 6, a riser 7 is connected to the upper end of the shell 6, a horizontal runner 5 is connected to the lower end of the shell 6, a filter screen seat 4 is connected to the end of the horizontal runner 5, the filter screen seat 4 is connected to a sprue 1, the filter screen seat 4 is hollow and open, a filter screen 3 is inserted into the filter screen seat 4, a slag collecting bag 2 is connected to the upper side of one side of the filter screen seat 4, which is close to the sprue 1, and a screen seat plug 8 is inserted into the opening of the filter screen seat 4.

In this embodiment, the opening of the filter screen holder 4 is provided on the side surface.

In this embodiment, the screen holder plug 8 is in a shape of a truncated pyramid and is a small opening near the opening of the filter screen holder 4.

In this embodiment, the shell 6, the riser 7, the horizontal runner 5, the filter screen seat 4, the sprue 1 and the slag ladle 2 are integrally arranged, and the screen seat plug 8 is separately arranged from the filter screen seat 4.

In this embodiment, the lower end of the slag collecting bag 2 near the filter screen seat 4 is open and is communicated with the filter screen seat 4.

The preparation process of the bottom pouring type pouring system comprises the following steps: the method comprises the following steps:

step one, respectively connecting the upper end and the lower end of a casting wax mold with a riser wax mold and a cross gate wax mold group tree, adhering one end of a filter screen seat wax mold with a port of the cross gate wax mold by using a hot melt adhesive, and adhering a slag-collecting wax-covering mold to the other side edge of the filter screen seat wax mold by using the hot melt adhesive to form an integral module;

step two, manufacturing a shell of the integral module in the step one, wiping off each layer of refractory material on the side end face of the filter screen seat during shell manufacturing, and smearing the refractory material on an inner cavity of the filter screen seat close to the wax mould of the screen seat plug;

step three, roasting and dewaxing the integral module in the step two to enable the filter screen seat to form a cavity type shell with an opening;

step four, cooling the integral module subjected to dewaxing in the step three to room temperature, inserting a filter screen on the filter screen seat before casting, and inserting a screen seat plug into an opening of the filter screen seat;

and step five, airing, drying, storing and pouring the integral structure in the step four for later use.

In the second step, the shell making process is to prepare a slurry by using mullite powder and silica sol in a ratio of 1:4, stick the slurry on the surface of the integral model, scatter mullite sand on the surface of the integral module stuck with the slurry, remove the sand slurry on the end face of the filter screen seat after scattering the sand, put the integral module stuck with the sand on a fan with a wind speed of 1-3m/s for air drying, make the next layer after drying, and repeat the above processes to make 5-7 layers.

In the fourth step, a layer of adhesive is coated on the peripheral matching surfaces of the plug of the filter screen seat, and then the adhesive is rapidly inserted into the opening of the filter screen seat and is pressed tightly.

During concrete pouring, molten steel is poured from an inlet of the sprue, dross in the molten steel is gathered on the dross collecting bag, the molten steel enters the casting body through the filter screen to be high-quality and pure molten steel, and the filter screen cannot be pasted by the dross to cause insufficient pouring and cold insulation defects.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.