Anti-drop device
By setting anti-detachment and fixing structures on the non-working surface of the chill, the problem of chill falling off during sand casting is solved, improving the cooling efficiency of the casting and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KOCEL STEEL
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-09
AI Technical Summary
In traditional sand casting, chills are prone to falling off during transport and pouring, leading to casting composition issues and increased production costs.
By setting an anti-detachment structure on the non-working surface of the chill to increase its contact area with the sand mold, and combining it with fixing structures such as skeletons, locking parts and fasteners, the connection between the chill and the sand mold is improved, preventing detachment.
It effectively prevents the cold iron from falling off during transportation and pouring, improves the cooling efficiency of castings, and reduces production costs and rework.
Smart Images
Figure CN224333384U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of casting chilling technology, and in particular to a device for preventing chilled iron from falling off. Background Technology
[0002] In traditional sand casting, chills are typically placed directly on the mold surface, which presents the following problems in actual production:
[0003] 1) In the traditional casting process of steel casting, the sand mold will crack and be damaged to varying degrees during the unpacking and hoisting process. The chills that are vertically downward and inclined at 45° downward will fall off under their own gravity.
[0004] 2) The pouring temperature of cast steel parts is generally 1600℃. At high pouring temperatures, sand molds are prone to collapse, and chills will fall directly into the mold cavity from the collapsed parts, causing problems with the composition of the casting. Summary of the Invention
[0005] In view of the problem that chills are prone to falling off after being placed in the sand mold and after the sand mold is transferred and the casting is poured, an anti-fall-off device is proposed. The anti-fall-off device can effectively control the chills from falling off their placement position, that is, to solve the problem that chills with an angle greater than 45 degrees to the vertical plane are prone to falling off during use or transfer.
[0006] Note: The surface of the chill that contacts or faces the casting is called the working surface, and the other surfaces are called non-working surfaces. A chill that is in direct contact with the casting is called a direct chill, which has a direct cooling effect; a chill that is not in direct contact with the casting but is separated from it by molding sand is called a sand-separated chill, which has an indirect cooling effect during casting.
[0007] An anti-detachment device includes a chill, and an anti-detachment structure is provided on the non-working surface of the chill. The anti-detachment structure can increase the contact area between the chill and the sand mold, thereby improving the connection force between the chill and the sand mold.
[0008] The above design solves the problem of chills falling off during sand mold transportation due to slight cracking of the sand mold and the weight of the chills themselves. This is mainly achieved by increasing the contact area between the chills and the sand mold to improve the connection between the two, thereby preventing them from falling off.
[0009] Furthermore, for chills densely arranged in a certain area, in addition to the aforementioned anti-detachment structure, a fixing structure is also provided to increase the purpose of preventing the detachment of several chills at one time. The fixing structure includes a frame, a locking component, and a fixing component. The frame serves to support the cooling within the area. The locking component is used to fix the chills within the area relative to the sand mold or casting where rapid cooling is required, and the fixing component is used to fix the fixing structure relative to the sand mold or casting where rapid cooling is required, so that it does not shift.
[0010] The beneficial effects of this utility model are as follows: by increasing the contact area between the chill and the sand mold, the connection force between the two is increased, avoiding the chill falling off due to vibration or breakage during sand mold transfer; furthermore, by setting a fixing structure in the direction of the non-working surface of the chill, the problem of chill falling off due to sand mold collapse after casting is avoided, allowing the chill to continue to cool, improving the cooling efficiency of the casting, and avoiding rework caused by chill falling off, thus reducing production costs. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of a chill with anti-detachment features;
[0012] Figure 2 This is a schematic diagram of a fixed structure;
[0013] Figure 3 This is a schematic diagram of the cross-shaped fixing structure in use;
[0014] Figure 4 This is a schematic diagram of the usage status of the cross-shaped fixed structure;
[0015] Among them, 1-anti-detachment groove; 2-locking component; 3-fixing component; 4-chill; 5-frame. Detailed Implementation
[0016] To more clearly illustrate the technical solution of this utility model, the technical solution of the invention will be described in detail with reference to the accompanying drawings. Obviously, the following description is some typical embodiments of this utility model. For those skilled in the art, other solutions can be obtained based on these embodiments without creative effort.
[0017] The specific implementation of this technical solution will now be illustrated using the example of sand casting core making for large cast steel parts.
[0018] In one embodiment, the anti-detachment device includes a chill, and a plurality of anti-detachment structures are provided on the non-working surface of the chill. These anti-detachment structures are used to increase the contact area between the chill and the sand mold, thereby improving the connection force between the chill and the sand mold. In this embodiment, the anti-detachment structure is a concave anti-detachment groove 1 with a triangular cross-section provided on the non-working surface of the chill, and the anti-detachment groove 1 penetrates the non-working surface of the chill. More preferably, at least two anti-detachment grooves 1 are provided on any non-working surface; and by setting the anti-detachment groove 1 in a triangular prism shape, the molding sand can better lock the chill.
[0019] As a supplement to this embodiment, the anti-detachment structure can be provided on multiple non-working surfaces, with at least two structures on each non-working surface; or, at least two anti-detachment structures are provided on any non-working surface. In this embodiment, the chill is a cylinder, with one end of its cylindrical surface as the working surface, and the cylindrical surface and sidewall opposite to the working surface as non-working surfaces. To further enhance the interaction force between the chill and the sand mold, at least two anti-detachment structures are also provided along the circumference of the sidewall. That is, by adding as many anti-detachment structures as possible on the non-working surfaces, the resistance between the chill and the sand mold is increased, thereby preventing the chill from loosening and falling off.
[0020] Specifically, in this embodiment, the width of the anti-detachment groove 1 on the non-working surface of the chill is not greater than one-quarter of the length of the non-working surface, and the anti-detachment groove 1 penetrates the non-working surface of the chill in the width direction.
[0021] The specific operation process of the anti-detachment structure is as follows:
[0022] 1) During the casting of chilled iron, the same type of wood material as the anti-detachment structure is used in conjunction with the chilled iron casting mold to cast chilled iron with an anti-detachment structure.
[0023] 2) In the sand casting process, place the chill with anti-detachment structure in the corresponding position of the core box or mold box, and continue sand casting to achieve the configuration of the chill with anti-detachment structure and the sand mold.
[0024] In another embodiment, the anti-detachment device further includes a fixing structure, which includes a frame 5, a locking member 2, and a fixing member 3. The frame 5 serves to support cooling within the area, the locking member 2 is used to fix the chilled iron within the area relative to the sand mold or casting that needs to be cooled so as not to move, and the fixing member 3 is used to fix the fixing structure relative to the sand mold or casting that needs to be cooled so as not to move.
[0025] In this embodiment, based on the cross-shaped arrangement of the chills, the frame 5 is cross-shaped to support the chills; the locking member 2 is a magnet to provide magnetic force to the chills and attract them to the frame 5; one end of the fixing member 3 is connected to the frame 5, and the other end extends into the sand box that forms the outer wall of the sand mold and is fixedly connected to the sand box, thereby achieving the purpose of setting the fixing structure in a designated position.
[0026] In this embodiment, based on the continuous arrangement of chilled iron sections, the frame 5 is in the shape of a star to support the chilled iron; the locking member 2 is a magnet to provide magnetic force to the chilled iron and attract it to the frame 5; one end of the fixing member 3 is connected to the frame 5, and the other end extends into the sand box that forms the outer wall of the sand mold and is fixedly connected to the sand box, thereby achieving the purpose of setting the fixing structure in a designated position.
[0027] In this embodiment, the shape of the skeleton 5 can be configured as a follow-up structure according to the arrangement of the chills, in order to ensure that the fixing structure can play a role in reinforcing the position of the chills and avoid the risk of the chills falling off due to the collapse of the sand mold after casting.
[0028] As a supplement to this embodiment, in order to provide sufficient magnetic field attraction, the locking element 2 is evenly spaced at 100mm intervals on the frame 5. This ensures that the chill is firmly locked to the fixed structure, avoiding the problem of the chill falling off due to the inability of the anti-detachment structure to completely lock the chill after the sand mold collapses. In other words, the magnetic force of the magnetic field attracts the chill, preventing it from falling off or moving away from the casting, which would result in poor subsequent cooling effect and a longer cooling time for the casting. More specifically, the locking element 2 is fixedly connected to the frame 5 to prevent the chill and the locking element 2 from affecting each other's positions, causing the cooling position of the chill to not meet the casting process requirements, or causing the magnetic field formed by the locking element 2 to shift.
[0029] As a supplement to this embodiment, the frame 5 of the fixing structure is made of steel pipe, and the fixing element 3 is made of steel pipe or C-shaped steel, more preferably C-shaped steel, thereby ensuring better connection between the fixing structure and the sand mold.
[0030] The operation process of the fixed structure is as follows:
[0031] 1) In the sand core making process of sand core or sand mold, according to the casting process, chills with anti-detachment structure and the fixing structure are set at designated positions in the core box and / or sand box;
[0032] 2) Continue with the flowing sand;
[0033] 3) Repeat the above two steps until the sand core or sand mold is completed;
[0034] 4) Core assembly design;
[0035] 5) Casting;
[0036] 6) After the casting has solidified to the point of being ready to be unpacked, the casting is unpacked and removed. The fixing structure and the chill with the anti-detachment structure are then removed manually or by electromagnetic chuck, so as to achieve the reuse of the fixing structure and the chill.
[0037] The above embodiments are merely descriptions of a typical application of the technical solution of this utility model. Reasonable extensions can be made without requiring creative effort.
Claims
1. An anti-fall-off device, characterized in that, It includes a chill, and the non-working surface of the chill is provided with several anti-detachment structures, which are used to increase the contact area between the chill and the sand mold.
2. The anti-fall-off device as described in claim 1, characterized in that, The anti-detachment structure is a concave anti-detachment groove with a triangular cross-section set on the non-working surface of the chill, and the anti-detachment groove penetrates the non-working surface of the chill.
3. The anti-fall-off device as described in claim 2, characterized in that, At least two anti-detachment grooves are provided on any non-working surface.
4. The anti-fall-off device as described in claim 3, characterized in that, The width of the anti-detachment groove on the non-working surface of the chill is no greater than one-quarter of the length of the non-working surface.
5. The anti-fall-off device as described in claim 1, characterized in that, The anti-fall-off device also includes a fixing structure, which includes a frame, a locking element, and a fixing element. The frame serves to support cooling within the area. The locking element is used to fix the chilled iron within the area relative to the sand mold or casting that needs to be cooled, preventing displacement. The fixing element is used to fix the fixing structure relative to the sand mold or casting that needs to be cooled, preventing displacement.
6. The anti-fall-off device as described in claim 5, characterized in that, The frame is cross-shaped to support the chill; the locking element is a magnet to provide magnetic force to the chill and attract it to the frame; one end of the fixing element is connected to the frame and the other end extends into the sand box that forms the outer wall of the sand mold and is fixedly connected to the sand box, thereby achieving the purpose of setting the fixing structure in a designated position.
7. The anti-fall-off device as described in claim 5, characterized in that, The frame is shaped like a star to support the chill; the locking element is a magnet to provide magnetic force to the chill and attract it to the frame; one end of the fixing element is connected to the frame and the other end extends into the sand box that forms the outer wall of the sand mold and is fixedly connected to the sand box, thereby achieving the purpose of setting the fixing structure in a designated position.
8. The anti-fall-off device as described in claim 5, characterized in that, The locking element is provided at 100mm intervals on the frame.
9. The anti-fall-off device as described in claim 5, characterized in that, The frame of the fixed structure is made of steel pipe, and the fastener is made of steel pipe or C-shaped steel.
10. The anti-fall-off device as described in claim 9, characterized in that, The fastener is made of C-shaped steel.