CN203437595U - Gating system - Google Patents

Abstract

The utility model discloses a gating system, wherein the pouring gate of the gating system is helical-line-shaped; a sprue is formed in one end of the pouring gate, and the other end of the pouring gate is connected with a straight pouring gate; the pouring gate is positioned above the straight pouring gate; a feeder head is arranged at the intersection of the pouring gate and the straight pouring gate; an air outlet is formed in the upper part of the feeder head; an inner pouring gate is communicated with the straight pouring gate, and the straight pouring gate is higher than the inner pouring gate. When the gating system is adopted for casting, molten iron enters the helical-line-shaped pouring gate and rises along the feeder head under the function of inertia in a spiral manner, and at the moment, impurities float during pouring, so that the first deslagging effect is realized; as the straight pouring gate is higher than the inner pouring gate, the liquid level of the molten iron in the straight pouring gate is higher than that of the molten iron in the inner pouring gate; in this way, the impurities float once again and float at the upper part of the molten iron, so that the impurities at the upper part do not flow into the inner pouring gate, and the second deslagging effect is realized. According to the utility model, through the secondary deslagging, the impurities in the molten iron can be effectively removed, and the yield of castings is ensured.

Description

a gating system

technical field

The utility model relates to a pouring system, which belongs to the technical field of casting. The utility model also relates to a new casting method of a glass mold utilizing the above pouring system.

Background technique

In casting production, whether it is steel castings, iron castings, aluminum castings or other alloy castings, due to various reasons, it is easy to produce quality problems such as slag holes, sand holes, air holes, etc. Therefore, to remove non-metallic inclusions in the metal melt, It has great technical value and economic value for improving the yield of castings and improving the quality of castings.

At present, in the casting process, casting filter screens are widely used to remove impurities. The filter screen can remove harmful impurities such as air bubbles, ash oxides, and various inclusions in the metal melt, thereby eliminating air holes, slag holes, and sand holes in castings, greatly improving the yield of castings, and improving the internal quality and appearance of castings quality. However, only relying on the filter to remove impurities is limited, and cannot fundamentally eliminate air holes, slag holes, and sand holes in castings, which will affect the yield of castings.

Utility model content

The technical problem to be solved by the utility model is to provide a pouring system and a new casting method for a glass mold using the pouring system. The gating system can effectively remove impurities in poured molten iron.

In order to solve the problems of the technologies described above, the technical solution of the utility model is:

A pouring system, including a sprue formed by molding sand, a sprue, a sprue and an inner sprue, the sprue is in the shape of a spiral, one end is provided with a sprue, and the other end is connected with the sprue; the sprue The sprue is located above the sprue, a riser is provided at the intersection of the sprue and the sprue, and an air outlet is provided above the riser; the ingate and the sprue are connected, and the sprue is higher than the ingate .

The sprue is 10-25mm higher than the inrunner.

A filter net is arranged between the bottom of the riser and the sprue.

There are multiple ingates, all of which are connected with the sprue. Generally, an inner sprue is provided on both sides of the sprue.

The molten iron is poured from the gate and enters the spiral sprue. When the molten iron flows in the spiral sprue to the riser, it spirals up along the riser under the action of inertia. The air outlet above the riser can ensure the smooth flow of molten iron. At this time, the impurities will float up during pouring, and the molten iron at the bottom will enter the sprue after being filtered by the filter installed at the bottom of the riser. Impurities in the floating state will not flow into the sprue, even if there are floating impurities flowing into the sprue with the molten iron or no impurities flowing into the sprue with the molten iron, the filter set at the bottom of the riser can filter them , Play the first slag removal effect.

The sprue is higher than the inner sprue, and the bottom of the sprue is connected with the inner sprue. Since the speed of molten iron flowing into the sprue is greater than that of the molten iron in the sprue, the liquid iron in the sprue The surface will be higher than the liquid level of the molten iron in the ingate, so that the impurities will float up again, and the molten iron will flow into the ingate along the bottom of the sprue. Similarly, the impurities float on the upper part of the molten iron, while the molten iron at the bottom of the sprue flows into the inner runner, so that the impurities on the upper part will not flow into the inner runner, which has the effect of secondary slag removal. The molten iron entering the inrunner finally enters the mold cavity.

A novel casting method for a glass mould, comprising the following steps:

(1) Prepare the wooden model bottom plate according to the size of the glass mold blank. The wooden model bottom plate includes a sprue mold, a sprue mold, a sprue mold and an inner sprue mold. The sprue mold is a spiral shape, and one end A sprue mold is connected, and the other end is connected with the sprue mold; the sprue mold is located above the sprue mold, and a riser mold is arranged at the intersection of the sprue mold and the sprue mold, and the riser mold is set above the sprue mold. There are air outlet holes; the sprue mold and the sprue mold are connected together, and the sprue mold is higher than the inrunner mold; the sprue mold is 10-25mm higher than the inrunner mold.

(2) Place the frame cover on the base plate of the wooden model, and fill the cavity of the frame with coal dust;

(3) Turn over the mold frame filled with coal powder sand together with the wooden model bottom plate, remove the wooden model bottom plate, and obtain the pouring system and casting mold;

(4) The molten iron is poured from the gate into the spiral sprue. When the molten iron flows to the riser in the spiral sprue, it spirals up along the riser under the action of inertia and passes through the filter set at the bottom of the riser. After being filtered by the net, it enters the sprue, and the molten iron flows into the inner sprue through the bottom of the sprue, and finally enters the mold cavity.

(5) After cooling, the cold iron mud core and frame are removed, and the sand is cleaned to obtain a glass mold blank.

The gating system of the utility model and the casting method adopting the gating system can effectively remove impurities in molten iron through secondary slag removal, ensure the yield of castings, and improve the internal quality and appearance quality of castings.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a schematic diagram of the pouring system of the present invention.

Detailed ways

(1) Prepare the wooden model bottom plate according to the size of the glass mold blank. The wooden model bottom plate includes a sprue mold, a sprue mold, a sprue mold and an inner sprue mold. The sprue mold is a spiral shape, and one end A sprue mold is connected, and the other end is connected with the sprue mold; the sprue mold is located above the sprue mold, and a riser mold is arranged at the intersection of the sprue mold and the sprue mold, and the riser mold is set above the sprue mold. There are air outlet holes; the sprue mold and the sprue mold are connected together, and the sprue mold is higher than the inrunner mold; the sprue mold is 10-25mm higher than the inrunner mold.

(2) Place the frame cover on the base plate of the wooden model, and fill the cavity of the frame with coal dust;

(3) Turn over the mold frame filled with coal powder sand together with the wooden model bottom plate, remove the wooden model bottom plate, and obtain the pouring system and casting mold.

As shown in Figure 1, the above-mentioned gating system is formed by molding sand and a wooden model bottom plate, including a gate 1, a runner 2, a sprue 5 and an inner runner 7. Port 1, the other end is connected to the sprue 5; the sprue 2 is located above the sprue 5, a riser 3 is provided at the intersection of the sprue 2 and the sprue 5, and an air outlet is provided above the riser 3 4. There is a filter screen 6 between the bottom of the riser 3 and the sprue 5; the sprue 7 is connected to the sprue 5, and the sprue 5 is higher than the sprue 7, and the sprue 5 is generally higher than the inner sprue. Runner 5 is 10-25mm higher.

There are multiple ingates 7, all of which communicate with the sprue 5. Generally, an ingate 7 is respectively arranged on both sides of the sprue 5 .

(4) The molten iron is poured from the gate 1 into the spiral sprue 2. When the molten iron flows in the spiral sprue 2 to the riser 3, it spirals up along the riser 3 under the action of inertia, and passes through The filter screen 6 arranged at the bottom of the riser 3 enters the sprue 5 after being filtered, and the molten iron flows into the ingate 7 through the bottom of the sprue 5, and finally enters the mold cavity.

The process of two times of slag removal is as follows:

The molten iron is poured from the gate 1 and enters the spiral sprue 2. When the molten iron flows in the spiral sprue 2 to the riser 3, it spirals up along the riser 3 under the action of inertia. Floating up, the molten iron at the bottom enters the sprue 5 after being filtered by the filter screen 6 provided at the bottom of the riser 3 . Impurities in the floating state will not flow into the sprue 5, even if there are floating impurities flowing into the sprue 5 with the molten iron or no impurities flowing into the sprue 5 with the molten iron, the filter set at the bottom of the riser 3 6 It can be filtered to achieve the first slag removal effect.

The sprue 5 is higher than the ingate 7, and the bottom of the sprue 5 is connected with the ingate 7. Since the speed of the molten iron flowing into the sprue 5 is greater than the speed of the molten iron flowing into the ingate 7 in the sprue 5, Therefore, the liquid level of the molten iron in the sprue 5 will be higher than the liquid level of the molten iron in the ingate 7, so that the impurities will float up again, and the molten iron will flow into the ingate 7 along the bottom of the sprue 5. Similarly, the impurities float on the upper part of the molten iron, while the molten iron at the bottom of the sprue 5 flows into the ingate, so that the impurities on the upper part will not flow into the ingate 7, and the effect of secondary slag removal is achieved.

(5) After cooling, the cold iron mud core and frame are removed, and the sand is cleaned to obtain a glass mold blank.

The molten iron of the utility model refers to the collective designation of the molten state of the base material for casting.

The above-mentioned embodiments do not limit the present utility model in any way, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present utility model.

Claims (4)

1. a running gate system, comprises the cast gate, running channel, sprue and the ingate that by molding sand, are formed, it is characterized in that: described running channel is spiral yarn shaped, and its one end is provided with cast gate, and the other end is connected with sprue; Described running channel is positioned at sprue top, in the intersection of running channel and sprue, is provided with rising head, and rising head top is provided with venthole; Described ingate and sprue connect, and sprue exceeds ingate.

2. a kind of running gate system according to claim 1, is characterized in that: described sprue exceeds ingate 10-25mm.

3. a kind of running gate system according to claim 1, is characterized in that: between described rising head bottom and sprue, be provided with screen pack.

4. according to a kind of running gate system described in claim 1,2 or 3, it is characterized in that: described ingate has a plurality of, it all connects with sprue.