A special drying rack for oil channel core of casting type to avoid coating waste

Abstract

The utility model discloses a kind of oil channel core special drying frame of casting class to avoid coating waste product, including pedestal, support strip, the lower part of pedestal is equipped with several support strips in parallel interval, support strip is long strip shape structure, its cross section is the structure of upper wide lower narrow, the cross section of support strip is symmetrical structure, the cross section both sides of support strip connection edge are smooth continuous straight line segment, the cross section is inverted isosceles triangle, the pedestal is inverted U type bending structure, it includes two parallel first bending section and second bending section connected between two first bending section, support strip upper end surface middle part is connected in the free end of first bending section, support strip upper end surface is equipped with mounting groove, for the first first bending section free end of pedestal insertion, still include crossbeam and handle, crossbeam lower end surface middle part is connected with second bending section upper end surface, crossbeam is parallel with support strip, handle is set on crossbeam upper end surface.

Description

Technical Field

[0001] This utility model is a special drying rack for oil channel cores in casting to avoid paint waste. Background Technology

[0002] In the foundry industry, oil channel cores, as key cores for internal cavity forming, typically require coating impregnation and drying before molding to enhance their high-temperature resistance, airtightness, and cavity surface quality. This impregnation and drying process generally relies on dedicated impregnation and drying racks to suspend and dry the oil channel cores.

[0003] Currently used dip-coating drying racks typically consist of a load-bearing structure and multiple support bars. The core head beam of the oil channel is directly hung on the support bars. In actual operation, due to deviations in manual placement, if the oil channel core is not accurately positioned, and given that multiple layers of dry coating tend to accumulate on the surface of the support bars over long-term use, the core head is very likely to come into contact with the support bars, causing excess coating to adhere to the core head surface. These abnormally adhered coatings are prone to peeling off or forming inclusions during subsequent casting processes, ultimately leading to casting defects or even scrap.

[0004] Furthermore, during the dip coating process, to ensure coating integrity, the dip depth of the oil channel core is often deeper than its actual forming area. This results in the lower part of the support strip also being immersed in the coating and accumulating a large amount of coating. As the service time increases, the coating accumulated on the surface of the support strip becomes increasingly thick, which not only affects the placement of the core but also further exacerbates the problem of interference between the core head and the support.

[0005] In existing technologies, the industry often uses the following two improvement methods to try to avoid the above problems: changing the cross-section of the support strip to a circle or a narrow rectangle in order to reduce the contact area. However, the contact between this type of structure and the core head is point-like or line-like, the core is prone to slippage, and the phenomenon of misalignment still occurs frequently, resulting in poor reliability.

[0006] Alternatively, limiting grooves can be designed at both ends of the oil passage core head to achieve positioning in conjunction with the support strip. However, this method relies on precise placement by workers, requires high manual operation skills, and still cannot avoid misalignment. At the same time, the problem of coating buildup on the surface of the support strip remains unresolved, which makes it difficult for the limiting structure to engage effectively, reducing the actual effect.

[0007] In summary, existing dip-coating drying rack structures cannot fundamentally solve the interference problem between the oil channel core head and the support strip, often leading to poor coating adhesion and resulting in scrap, which seriously affects the quality of castings and yield. Therefore, there is an urgent need for an oil channel core drying rack with a reasonable improved structure, strong placement tolerance, and the ability to suppress coating buildup, in order to completely solve the above-mentioned technical problems. Utility Model Content:

[0008] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a special drying rack for oil channel cores in casting to avoid paint waste.

[0009] A special drying rack for oil channel cores in casting to avoid paint waste includes a base and support bars. Several support bars are arranged parallel to each other below the base. The support bars are long strips with a cross-section that is wider at the top and narrower at the bottom.

[0010] Furthermore, the cross-section of the support strip has a symmetrical structure.

[0011] Furthermore, the connecting edges on both sides of the cross-section of the support bar are smooth, continuous straight line segments.

[0012] Furthermore, the cross-section is an inverted isosceles triangle.

[0013] Furthermore, the base is an inverted U-shaped bending structure, which includes two parallel first bending segments and a second bending segment connected between the two first bending segments, with the middle of the upper end face of the support bar connected to the free end of the first bending segment.

[0014] Furthermore, the upper end face of the support bar is provided with an installation groove for insertion of the free end of the first bent section of the base.

[0015] Furthermore, it also includes a crossbeam and a handle. The middle of the lower end face of the crossbeam is connected to the upper end face of the second bending section. The crossbeam is parallel to the support bar, and the handle is located on the upper end face of the crossbeam.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0017] First, the support bar adopts a cross-sectional structure that is wider at the top and narrower at the bottom, preferably an inverted isosceles triangle, and is combined with smooth and continuous guide slopes on both sides. This ensures that even if the oil channel core is installed off-center during the connection, its side can still maintain a stable and safe distance from the support bar. This fundamentally avoids contact between the core head and the support bar or its surface coating, significantly reducing abnormal coating adhesion and casting scrap rate caused by interference. At the same time, the flat upper end ensures the stability of the connection.

[0018] Secondly, this structure has excellent flow guidance for paint discharge. After dip coating, the paint remaining on the surface of the support strip can naturally converge and be discharged along the slope, avoiding paint accumulation, improving the cleanliness and long-term stability of the drying rack, and reducing the frequency of manual cleaning and maintenance costs.

[0019] Furthermore, the present invention adopts a pluggable modular structure design, which makes the connection between the support bar and the base simple and firm, and facilitates installation and replacement, thereby improving the assembly efficiency and adaptability of the equipment.

[0020] Finally, through the combination of structural limiting and fault-tolerant characteristics, even if there are deviations in the hanging and placing of the core parts during actual production operations, the core parts can be stably positioned, thereby significantly improving the consistency and yield of castings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a special drying rack for oil channel cores, designed to prevent paint waste during casting.

[0022] Figure 2 This is a schematic diagram of the dip-coating area;

[0023] Figure 3 This is a schematic diagram of the forming area;

[0024] Figure 4 This is a schematic diagram of the extreme bias case;

[0025] Figure 5 This is a schematic diagram showing the flow of paint on the surface of the support strip;

[0026] In the diagram, 1 is the handle, 2 is the crossbeam, 3 is the base, and 4 is the support bar. Detailed Implementation

[0027] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0028] A special drying rack for oil channel cores in casting to avoid paint waste includes a base 3, several support bars 4, a crossbeam 2, and a handle 1. The base 3 has an overall inverted U-shaped bent structure, specifically composed of two parallel first bent sections and a second bent section connecting the two first bent sections. Multiple support bars 4 are arranged parallel and spaced below the base 3. Each support bar 4 is a long strip structure, with its upper end face connected to the free end of the first bent section via an insertion method. An installation groove is provided at the connection point for easy assembly and disassembly.

[0029] A rigid frame structure is formed. The handle 1 is set on the upper end face of the crossbeam 2 for the operator to carry or move. The cross-section of the support bar 4 is set as a structure that is wider at the top and narrower at the bottom, specifically an inverted isosceles triangle. This cross-sectional structure is symmetrical, which enhances the suspension stability and force balance, and further ensures that the core component does not shift or slip.

[0030] The crossbeam 2 is arranged parallel above the support bar 4, and its lower end face is connected to the upper end face of the second bending section, forming a frame.

[0031] Working principle: such as Figure 2 and 3 As shown, Figure 3The area within the frame is the molding area. During the dip coating process, the dip coating depth of the oil channel core is usually greater than its actual casting height, so the lower area of ​​the support strip 4 is also submerged in the coating. Over time, a thick coating gradually adheres to and accumulates on the surface of the support strip 4. When the oil channel core shifts position during the mounting process, the core head is very likely to come into contact with the coating accumulated on the surface of the support strip 4, thus causing coating defects.

[0032] In this embodiment, such as Figure 4 As shown, the oil channel core is mounted on the support bar 4 via the core head crossbeam 2. Even in extreme offset installation situations, because the cross-section of the support bar 4 is designed to be wider at the top and narrower at the bottom, and its two sides are smooth and continuous linear inclined structures, the side of the oil channel core and the outer side of the support bar 4 can always maintain a sufficient safe distance, avoiding contact between the core head and the support bar 4, and effectively preventing the occurrence of abnormal coating adhesion.

[0033] In addition, such as Figure 5 As shown, the connecting edges on both sides are smooth and continuous straight lines, forming a guide slope, which is conducive to the natural flow and discharge of the coating along both sides after dipping, reducing coating residue accumulation and extending the service life of the support strip 4.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A special drying rack for oil channel cores in casting to avoid paint waste, characterized in that, It includes a base and support bars. Several support bars are arranged parallel to each other below the base. The support bars are long strips with a cross-section that is wider at the top and narrower at the bottom. The cross-section of the support bar has two sides that are connected by smooth, continuous straight lines.

2. The oil passage core drying rack according to claim 1, characterized in that, The cross-section of the support bar is symmetrical.

3. The oil passage core drying rack according to claim 2, characterized in that, The cross-section is an inverted isosceles triangle.

4. The special drying rack for oil passage cores according to claim 1, characterized in that, The base is an inverted U-shaped bending structure, which includes two parallel first bending segments and a second bending segment connected between the two first bending segments. The upper end of the support bar is connected to the free end of the first bending segment at the middle.

5. The oil passage core drying rack according to claim 4, characterized in that, The upper end of the support bar is provided with an installation groove for insertion into the free end of the first bent section of the base.

6. The oil passage core drying rack according to claim 4, characterized in that, It also includes a crossbeam and a handle. The middle of the lower end face of the crossbeam is connected to the upper end face of the second bending section. The crossbeam is parallel to the support bar, and the handle is located on the upper end face of the crossbeam.

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