Pouring basin and manufacturing and using method thereof

Abstract

The invention relates to a pouring basin which comprises a molten iron inflow cup, a molten iron channel, a molten iron inoculation cavity, an inoculant feeding hopper and a molten iron standing basin. One end of the molten iron channel is connected with an outlet of the molten iron inflow cup, the other end of the molten iron channel is connected with an inlet of the molten iron inoculation cavity, and the molten iron channel is tangent to the side wall of the molten iron inoculation cavity; the molten iron inoculation cavity is arranged at the top of the molten iron standing basin, a water outlet of the molten iron inoculation cavity is connected with a water inlet of the molten iron standing basin, and a water outlet is further formed in the bottom of the molten iron standing basin; the inoculant feeding hopper is arranged at the top of the molten iron inoculation cavity; the upper edge of the nucleating agent feeding hopper and the upper edge of the molten iron inflow cup are located on the uppermost surface of the pouring basin; the invention further discloses a manufacturing and using method of the pouring basin. According to the technical scheme, the problem that in the prior art, due to the fact that a stream inoculation hopper is used, molten iron inoculation is uneven is solved, the quantitative pouring pouring basin capable of achieving high-quality stream inoculation is provided, it is guaranteed that the poured molten iron is evenly inoculated, the uniformity and purity of the molten iron are effectively improved, and the production cost is reduced. And a powerful guarantee is provided for production of nodular iron casting products with high nodulizing rate and high graphite nodule number.

Description

Technical Field

[0001] The invention relates to the technical field of sand casting, and more particularly to a quantitative pouring pouring basin capable of realizing high-quality inoculation. Background Art

[0002] At present, when producing high-quality ductile iron products with ceramic mounds, the production is usually carried out by iron-out inoculation and pouring-with-flow inoculation to ensure uniform and stable performance of the products. In the pouring-with-flow inoculation, the with-flow inoculation bucket is set at the water outlet of the ladle. During the pouring process, as the ladle tilts, the molten iron flows out of the ladle, and the inoculant falls on the molten iron flow, and then flows into the pouring basin and enters the mold cavity. Using this method, when there is more molten iron in the ladle, the ladle tilting angle is small, and the inoculant in the inoculation bucket can fall on the molten iron flow to strengthen the inoculation, but when there is less molten iron in the ladle, the ladle tilting angle increases, and the inoculant in the inoculation bucket cannot accurately fall on the molten iron flow. Especially for small products, the pouring time is short, resulting in extremely uneven pouring-with-flow inoculation. If one bag of molten iron is used to cast one box of products, the performance of different parts of the products will be uneven; if one bag of molten iron is used to cast multiple boxes of products, it will be difficult to cast the products cast later, resulting in substandard performance. This is especially true for ductile iron castings that have extremely high requirements for spheroidization rate and graphite number. This method cannot produce products that meet the requirements. Summary of the invention

[0003] Based on this, it is necessary to provide a quantitative pouring spout basin and its use method that can achieve high-quality inoculation with the flow, so as to ensure that the poured molten iron is evenly inoculated, in order to solve the problem of uneven inoculation of molten iron caused by using the inoculation bucket in the prior art.

[0004] A pouring basin, the pouring basin comprising a molten iron inflow cup, a molten iron channel, a molten iron inoculation cavity, an inoculant hopper, and a molten iron static basin; one end of the molten iron channel is connected to the outlet of the molten iron inflow cup, and the other end is connected to the inlet of the molten iron inoculation cavity, and the molten iron channel is tangent to the side wall of the molten iron inoculation cavity; the molten iron inoculation cavity is arranged at the top of the molten iron static basin, the water outlet of the molten iron inoculation cavity is connected to the water inlet of the molten iron static basin, and the bottom of the molten iron static basin is also provided with a water outlet; the inoculant hopper is arranged at the top of the molten iron inoculation cavity; the upper edge of the inoculant hopper and the upper edge of the molten iron inflow cup are located on the uppermost surface of the pouring basin.

[0005] In one of the embodiments, the molten iron channel is a cylindrical pipe structure, and one end connected to the molten iron inflow cup is higher than one end connected to the molten iron inoculation chamber.

[0006] In one of the embodiments, the molten iron inlet cup is generally a truncated cone structure that is larger at the top and smaller at the bottom, the upper side has a diameter greater than 200 mm, and the lower side is a spherical structure.

[0007] In one embodiment, the inoculant feeding hopper is a funnel-shaped structure with an upper conical structure and a lower cylindrical channel.

[0008] In one of the embodiments, a horizontal rectangular cavity leading to the outer side of the pouring basin is provided in the middle of the lower cylindrical passage of the inoculant hopper for inserting an inoculant baffle.

[0009] In one of the embodiments, a casting baffle groove with a depth of 20mm-100mm and a width of 1mm-20mm is reserved between the inoculant feeding hopper and the molten iron inlet cup.

[0010] In one of the embodiments, the diameter of the water outlet of the molten iron inoculation chamber is larger than the diameter of the water inlet.

[0011] In one embodiment, the method for making the pouring basin comprises the following steps:

[0012] S01, designing the size of the molten iron inoculation cavity and the molten iron static basin according to the quantitative pouring volume of the casting, drawing the three-dimensional file of the pouring basin, and manufacturing the pouring basin by 3D printing;

[0013] S02, applying a high temperature resistant coating on all surfaces of the pouring basin in contact with the molten iron.

[0014] In one of the embodiments, the volume of the molten iron standing basin is 30%-40% greater than the volume of the molten iron poured quantitatively for the casting.

[0015] In one embodiment, the method for using the pouring basin comprises the following steps:

[0016] S01, preparation before pouring, after fixing the pouring basin, inserting the inoculant baffle into the rectangular cavity at the bottom of the inoculant hopper, inserting the pouring baffle into the pouring baffle groove between the inoculant hopper and the molten iron inlet cup, adding the inoculant into the inoculant hopper, placing a plug at the water outlet of the molten iron standing basin, and waiting for pouring;

[0017] S02, pouring, pouring molten iron into the molten iron inlet cup and simultaneously removing the inoculant baffle at the bottom of the inoculant hopper, the inoculant flows into the molten iron for instantaneous inoculation, and then enters the molten iron standing basin, stands still, and pulls out the water outlet plug of the molten iron standing basin to complete the pouring.

[0018] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0019] The invention discloses a pouring basin and a method for making and using the same, which overcomes the problem of uneven inoculation of molten iron caused by using a flow-following inoculation bucket in the prior art, and provides a quantitative pouring pouring basin that can achieve high-quality flow-following inoculation, ensuring that the poured molten iron is uniformly inoculated. The pouring basin is provided with an instantaneous inoculant feeding hopper, so that the molten iron flow can be evenly and accurately added with inoculant, ensuring the uniformity of the molten iron inoculation. After that, the molten iron enters a quantitative molten iron standing basin, and is left standing for a while, so that the molten iron is further homogenized, and the slag also has a certain floating time, which effectively improves the uniformity and purity of the molten iron, and provides a strong guarantee for the production of ductile iron castings with high spheroidization rate and number of graphite balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Sectional view of the pouring basin;

[0021] Figure 2 Schematic diagram of the baffle of the gate basin.

[0022] Description of reference numerals:

[0023] 1-molten iron inlet cup, 2-molten iron channel, 3-pouring baffle groove, 4-inoculant feeding hopper, 5-rectangular cavity, 6-molten iron inoculation cavity, 7-molten iron standing basin, 8-pouring baffle, 9-inoculant baffle. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0025] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] In a first aspect, an embodiment of the present invention discloses a pouring basin, comprising a molten iron inlet cup 1, a molten iron channel 2, an inoculant hopper 4, a molten iron inoculation cavity 6 and a molten iron standing basin 7; specifically, Figure 1 As shown, one end of the molten iron channel 2 is connected to the outlet of the molten iron inflow cup 1, and the other end is connected to the entrance of the molten iron inoculation chamber 6. The connection between the molten iron channel 2 and the molten iron inoculation chamber 6 is tangent to the side wall of the molten iron inoculation chamber 6, which is convenient for the molten iron to swirl on the side wall of the molten iron inoculation chamber 6, ensuring that the inoculant is fully and evenly distributed in the molten iron; the molten iron inoculation chamber 6 is arranged at the top of the molten iron static basin 7, the water outlet of the molten iron inoculation chamber 6 is connected to the water inlet of the molten iron static basin 7, and the bottom of the molten iron static basin 7 is also provided with a water outlet; the inoculant feeding hopper 4 is arranged at the top of the molten iron inoculation chamber 6, and further, the inoculant feeding hopper 4 is arranged at the molten iron inoculation chamber 6. the top of the molten iron channel 2 and one side close to the molten iron channel 2; the upper edge of the inoculant feeding hopper 4 and the upper edge of the molten iron inlet cup 1 are located at the uppermost surface of the pouring basin; during operation, when the molten iron enters the molten iron inoculation chamber 6 from the molten iron inlet cup 1 through the molten iron channel 2, the inoculant falls from the inoculant feeding hopper 4 onto the molten iron flow, and then the molten iron swirls along the side wall of the molten iron inoculation chamber 6 to ensure that the inoculant is fully and evenly distributed in the molten iron. Under the action of gravity, the molten iron falls after inoculation and finally reaches the lower side of the molten iron inoculation chamber 6, flows out from the outlet of the molten iron inoculation chamber 6, flows into the molten iron standing basin 7, and flows out from the outlet of the molten iron standing basin 7 after standing.

[0028] The molten iron channel 2 is a cylindrical pipe structure, one end of which is connected to the molten iron inlet cup 1, and the other end is connected to the molten iron inoculation chamber 6. The molten iron channel 2 is inclined and not parallel to the ground, and the end connected to the molten iron inlet cup 1 is higher, and the end connected to the molten iron inoculation chamber 6 is lower. This arrangement is to allow the molten iron to enter the molten iron inoculation chamber 6 faster from the molten iron inlet cup 1, and to prevent the molten iron from staying in the molten iron inlet cup 1 for too long, resulting in a long pouring time or splashing outwards.

[0029] The molten iron inlet cup 1 is generally in a truncated cone structure with a larger upper portion and a smaller lower portion. The upper side diameter is designed to be greater than 200 mm, which is convenient for accurately pouring molten iron into the molten iron inlet cup 1. The lower side is designed to be a spherical structure, which is beneficial to the gathering of molten iron and minimizes the impact on the molten iron inlet cup 1. A water outlet is provided on the bottom side of the molten iron inlet cup 1, and the molten iron enters the molten iron inoculation chamber 6 through the molten iron channel 2 connected to the water outlet of the molten iron inlet cup 1.

[0030] like Figure 1-2As shown, the inoculant feeding hopper 4 is a funnel-shaped structure, the upper part of which is a conical structure with a larger upper part and a smaller lower part for holding the instantaneous inoculant, and the lower part is a smaller cylindrical channel leading to the top of the molten iron inoculation chamber 6 close to the molten iron channel 2, which is the channel for the instantaneous inoculant to fall. Furthermore, the diameter of the cylindrical channel is 5mm-10mm; a horizontal rectangular cavity 5 is set in the middle part of the cylindrical channel, and the rectangular cavity 5 leads to the outer side of the pouring basin all the way, for inserting the inoculant baffle 9, further, a gap of 1mm-2mm is reserved between the inoculant baffle 9 and the rectangular cavity 5, and the length of the inoculant baffle 5 is more than 30mm greater than the reserved depth of the rectangular cavity 5, so as to facilitate the insertion and removal of the inoculant baffle 5; during operation, before adding the inoculant, the inoculant baffle 9 is inserted to ensure that the inoculant does not fall, and when the molten iron begins to enter the molten iron inlet cup 1, the inoculant baffle 9 is pulled out to allow the inoculant to begin to fall.

[0031] The molten iron inoculating chamber 6 is a vertical cylindrical structure, the water inlet of the molten iron inoculating chamber 6 is connected to the molten iron channel 2, and the molten iron channel 2 is tangent to the side wall of the molten iron inoculating chamber 6, so that the molten iron can swirl on the side wall of the molten iron inoculating chamber 6 to achieve uniform inoculation. Its water outlet is connected to the molten iron standing basin 7, and an inoculant feeding hopper 4 is also provided on the top. During operation, the molten iron enters the molten iron inoculating chamber 6 from the molten iron channel 2. After the molten iron is inoculated with the flow at this position, it enters the molten iron standing basin 7 through the water outlet. Furthermore, the diameter of the water outlet of the molten iron inoculating chamber 6 is larger than the diameter of its water inlet, so as to ensure that the molten iron does not gather and fill in the molten iron inoculating chamber 6 to avoid affecting normal pouring.

[0032] The molten iron standing basin 7 is arranged at the bottom of the entire pouring basin, and in this embodiment, it is a rectangular parallelepiped structure. Above it is the molten iron inoculation chamber 6, and the molten iron dissolved with the instantaneous inoculant flows from the molten iron inoculation chamber 6 into the molten iron standing basin 7. The water inlet of the molten iron standing basin 7 is the water outlet of the molten iron inoculation chamber 6. The water outlet of the molten iron standing basin 7 is located at the lower part of the other end of the molten iron inlet, and a plug that can be inserted and removed is set at the water outlet. After the molten iron flows into the molten iron standing basin 7, the standing time is set according to the demand, and the plug pre-set at the water outlet of the molten iron standing basin 7 is pulled out, and the molten iron flows out from the water outlet at the lower end to complete the pouring process. Further, the quantitative pouring weight should be 60%-70% of the maximum weight of the molten iron contained in the molten iron standing basin 7.

[0033] like Figure 1-2As shown, a pouring baffle groove 3 with a depth of 20mm-100mm and a width of 1mm-20mm is reserved between the inoculant feeding hopper 4 and the molten iron inlet cup 1 for inserting the pouring baffle 8. In the present embodiment, the height of the pouring baffle 8 is greater than 200mm, and the insertion depth is greater than 40mm. A gap of 1mm-2mm is left between the pouring baffle 8 and the reserved pouring baffle groove 3 to facilitate the insertion and fixation of the pouring baffle 8. The pouring baffle 8 arranged between the molten iron inlet cup 1 and the inoculant feeding hopper can prevent the molten iron from splashing into the inoculant feeding hopper 4 when entering the molten iron inlet cup 1. Furthermore, the pouring baffle 8 is made of metal and can be reused many times to reduce costs.

[0034] In a second aspect, an embodiment of the present invention further discloses a method for manufacturing the pouring basin described in the above embodiment, which specifically comprises the following steps:

[0035] According to the size of the casting, the pouring weight is calculated in advance, and the dimensions of the molten iron inoculation cavity 6 and the molten iron standing basin 7 are designed according to the pouring weight. A three-dimensional drawing file of the entire pouring basin is drawn, and the pouring basin is made by a 3D printer. Anti-high temperature coating is applied to all surfaces of the pouring basin that are in contact with the molten iron. Furthermore, the pouring basin is made of the same material as that of the casting production line, which is convenient for early production and later boxing and recycling. Furthermore, the volume of the molten iron standing basin 7 is greater than 30%-40% of the volume of the molten iron poured quantitatively for the casting, so as to prevent the molten iron from falling, splashing or overflowing from the molten iron standing basin 7.

[0036] In a third aspect, an embodiment of the present invention further discloses a method for using the pouring basin described in the above embodiment, and the method for using the pouring basin comprises the following steps:

[0037] S01, preparation before pouring, when fixing the pouring basin, fix the molten iron inlet cup 1 on the side that is easy to pour, insert the inoculant baffle 9 into the rectangular cavity 5 in the middle part of the cylindrical channel at the bottom of the inoculant feeding hopper 4, insert the pouring baffle 8 into the pouring baffle groove 3 between the inoculant feeding hopper 4 and the molten iron inlet cup 1, add the inoculant into the inoculant feeding hopper 4, place a plug at the water outlet of the molten iron standing basin 7, and the preparation is completed, waiting for pouring;

[0038] S02, pouring, pouring molten iron into the molten iron inlet cup 1 and removing the inoculant baffle 9 at the bottom of the inoculant hopper 4, the molten iron enters the molten iron inoculation chamber 6 through the molten iron channel 2 from the water outlet of the molten iron inlet cup 1, the molten iron swirls on the side wall of the inoculation chamber, the inoculant flows into the molten iron for instantaneous inoculation, after the inoculation, the molten iron, under the action of gravity, enters the molten iron standing basin 7 through the water outlet of the molten iron inoculation chamber 6, and stands to make the molten iron further uniform, pull out the preset plug at the water outlet of the molten iron standing basin 7, and complete the pouring.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A pouring basin, characterized in that: The pouring basin comprises a molten iron inflow cup, a molten iron channel, a molten iron inoculation cavity, an inoculant feeding hopper, and a molten iron static basin; One end of the molten iron channel is connected to the outlet of the molten iron inlet cup, and the other end is connected to the inlet of the molten iron inoculation chamber, and the molten iron channel is tangent to the side wall of the molten iron inoculation chamber; The molten iron inoculation chamber is arranged at the top of the molten iron static basin, the water outlet of the molten iron inoculation chamber is connected to the water inlet of the molten iron static basin, and the bottom of the molten iron static basin is also provided with a water outlet; The inoculant feeding hopper is arranged at the top of the molten iron inoculation chamber; The upper edge of the inoculant feeding hopper and the upper edge of the molten iron inlet cup are located on the uppermost surface of the pouring basin.

2. The pouring basin according to claim 1, characterized in that: The molten iron channel is a cylindrical pipe structure, and one end connected to the molten iron inflow cup is higher than the other end connected to the molten iron inoculation chamber.

3. The pouring basin according to claim 1, characterized in that: The molten iron inlet cup is generally in a truncated cone structure that is larger at the top and smaller at the bottom, the upper side opening is designed to be greater than 200 mm, and the lower side is a spherical structure.

4. The pouring basin according to claim 1, characterized in that: The inoculant feeding hopper is a funnel-shaped structure with an upper conical structure and a lower cylindrical channel.

5. The pouring basin according to claim 4, characterized in that: A horizontal rectangular cavity leading to the outer side of the pouring basin is arranged in the middle of the lower cylindrical channel of the inoculant feeding hopper for inserting the inoculant baffle.

6. The pouring basin according to claim 1, characterized in that: A casting baffle groove with a depth of 20mm-100mm and a width of 1mm-20mm is reserved between the inoculant feeding hopper and the molten iron inlet cup.

7. The pouring basin according to claim 1, characterized in that: The water outlet diameter of the molten iron inoculation chamber is larger than the water inlet diameter.

8. A method for manufacturing a pouring basin according to any one of claims 1 to 7, characterized in that: The method for making the pouring basin comprises the following steps: S01, designing the size of the molten iron inoculation cavity and the molten iron static basin according to the quantitative pouring volume of the casting, drawing the three-dimensional file of the pouring basin, and manufacturing the pouring basin by 3D printing; S02, applying a high temperature resistant coating on all surfaces of the pouring basin in contact with the molten iron.

9. The manufacturing method according to claim 8, characterized in that: The volume of the molten iron static basin is 30%-40% greater than the volume of the molten iron quantitatively poured into the casting.

10. A method for using the pouring basin according to any one of claims 1 to 7, characterized in that: The method for using the pouring basin comprises the following steps: S01, preparation before pouring, after fixing the pouring basin, inserting the inoculant baffle into the rectangular cavity at the bottom of the inoculant hopper, inserting the pouring baffle into the pouring baffle groove between the inoculant hopper and the molten iron inlet cup, adding the inoculant into the inoculant hopper, placing a plug at the water outlet of the molten iron standing basin, and waiting for pouring; S02, pouring, pouring molten iron into the molten iron inlet cup and simultaneously removing the inoculant baffle at the bottom of the inoculant hopper, the inoculant flows into the molten iron for instantaneous inoculation, and then enters the molten iron standing basin, stands still, and pulls out the water outlet plug of the molten iron standing basin to complete the pouring.

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