Novel integrated pouring ring

Abstract

The utility model relates to the technical field of pouring tool, concretely to integrative novel pouring mould ring, including outer mould ring, the inside of outer mould ring is provided with concentric circle inner mould ring, and outer mould ring is annular metal structure, concentric circle inner mould ring is arranged coaxially with outer mould ring, and the bottom of concentric circle inner mould ring is installed with sealing bottom, and the upper portion of concentric circle inner mould ring is hollow structure, and the circumferential of outer mould ring and concentric circle inner mould ring is uniformly distributed and is connected with the rib, and the inner wall of outer mould ring and the outer wall of concentric circle inner mould ring form the cavity, and the bottom of outer mould ring is matched with gypsum board and water absorption paper, and the annular section pouring space is formed in the cavity, and the central region is not filled with material, in this integrative novel pouring mould ring, the pouring mould ring is through the innovative structure design of '' outer mould ring + coaxial concentric circle inner mould ring'', and is matched with the sealing bottom of inner mould ring bottom, and the annular section pouring space is forced to form in the cavity, and the central region is no longer filled with material.

Description

Technical Field

[0001] This utility model relates to the field of casting tool technology, specifically to a novel integrated casting mold ring. Background Technology

[0002] Ceramic-bonded grinding wheels are key consumables in precision machining in fields such as machinery and aerospace, with a global annual demand exceeding 200 billion yuan. Casting molding, due to its advantage of uniform microstructure, is often used in applications such as bearing groove grinding. This process requires a casting wheel mold ring (ring-shaped metal mold) for forming, along with plasterboard (for support and water absorption) and absorbent paper (to accelerate curing) to complete the water casting process. However, with rising raw material prices and the high material consumption coefficient and cost of traditional mold rings, the market urgently needs material-saving molds that reduce material usage without sacrificing strength.

[0003] The casting process for grinding wheel mold rings has gone through three stages: early single-cavity outer mold rings (which resulted in significant raw material waste), locally thickened outer mold rings (which only improved rigidity), and hollow inner mold rings (which remained ineffectively filled due to the lack of a sealed bottom). In the traditional formula for calculating the cross-sectional area of ​​a single-cavity outer mold ring, the inner diameter of the inner mold ring is 0. The molding material fills the cavity completely, and the central area filled with 15%-20% of the raw material needs to be removed later, which wastes resources and extends the production cycle due to the additional roughing process. Utility Model Content

[0004] The purpose of this invention is to provide a novel integrated casting mold ring to solve the problem mentioned in the background art where the inner diameter of the inner mold ring is 0, the molding material fills the cavity, and the central area filled with 15%-20% of the raw material needs to be removed later, which wastes resources and prolongs the production cycle due to additional roughing processes.

[0005] To achieve the above objectives, this utility model provides an integrated novel casting mold ring, including an outer mold ring, with a concentric inner mold ring disposed on the inner side of the outer mold ring. The outer mold ring has an annular metal structure. The concentric inner mold ring is coaxially arranged with the outer mold ring, and a sealing bottom is installed at the bottom of the concentric inner mold ring. The upper part of the concentric inner mold ring is a hollow structure. The outer mold ring and the concentric inner mold ring are circumferentially distributed with connecting ribs. A cavity is formed between the inner wall of the outer mold ring and the outer wall of the concentric inner mold ring. The bottom of the outer mold ring is used in conjunction with plasterboard and absorbent paper to form a casting space with an annular cross section within the cavity, so that the central area is not filled with material.

[0006] This design constructs the mold body using an outer mold ring as the base and a concentric inner mold ring as the core dividing structure. The bottom of the inner mold ring is sealed to prevent the molding material from entering the central area, while the hollow top structure does not affect mold operation or slurry heat dissipation. The circumferentially distributed connecting ribs ensure the coaxial fixation of the inner and outer mold rings, preventing relative displacement. At the same time, plasterboard (for support and water absorption) and absorbent paper (to accelerate moisture conduction) are used to form an annular pouring space in the gap between the inner and outer mold rings, structurally limiting the filling range of the molding material.

[0007] Preferably, the inner diameter of the outer mold ring is D1, and the inner diameter of the concentric inner mold ring is D2, where D2 = (1 / 3 - 1 / 2)D1.

[0008] This setting is based on the actual grinding requirements of the grinding wheel (the effective grinding area is concentrated on the outer side). The inner diameter of the inner mold ring is determined by the parameter limit (D2=(1 / 3-1 / 2) D1). This ensures that the central hollow area is large enough to save material, while avoiding the inner mold ring being too large, which would result in insufficient effective grinding width of the grinding wheel, thus balancing "material saving" and "performance".

[0009] Preferably, the number of connecting ribs is 3-5, which are connected to the upper part of the outer mold ring and the concentric inner mold ring.

[0010] The number of connecting ribs is set to 3-5 based on the balance between "structural stability" and "slurry flowability": 3 ribs can meet the foundation fixing requirements, and 5 ribs further improve coaxiality; connected to the upper part of the inner and outer mold rings, it avoids the bottom connection from obstructing the contact between the absorbent paper and the gypsum board, and does not block the slurry pouring channel, ensuring a smooth pouring process.

[0011] Preferably, the width and length of the connecting bar is w = (5-10)d, where d is the thickness of the connecting bar.

[0012] This setting controls the volume of the connecting ribs while ensuring their strength through the parameter relationship of "rib width w = (5-10) d": the rib thickness d determines the load-bearing capacity of the foundation, and the rib width can be increased proportionally to improve the connection area, avoid the ribs from breaking due to local stress concentration, and at the same time avoid the ribs from being too wide to block the slurry channel or increase the weight of the mold.

[0013] Preferably, the outer mold ring, the concentric inner mold ring, and the connecting rib adopt an integrated metal structure, made of steel or cast iron, and the surface is provided with an 8-12μm thick anti-corrosion coating.

[0014] This feature incorporates an integrated metal structure (steel or cast iron) that is machined as a single unit, eliminating assembly gaps between separate structures and enhancing the overall rigidity of the mold. An 8-12μm thick anti-corrosion coating covers the mold surface, forming a dense protective layer that blocks the contact between moisture and chemical components in the molding slurry and the metal substrate, reducing corrosion.

[0015] Preferably, the anti-corrosion coating is a nickel plating layer, prepared by a chemical plating process, which improves the corrosion resistance and service life of the mold.

[0016] This nickel plating feature offers excellent chemical stability, resisting corrosion from acidic and alkaline environments. The chemical plating process ensures uniform coating coverage (including mold edges and gaps), strong adhesion between the coating and the substrate, and resistance to peeling. Compared to other coatings (such as zinc plating), it offers superior corrosion resistance and wear resistance.

[0017] Preferably, the gypsum board is placed on a shaking table, which drives the gypsum board to make circular motions, about 2-5 revolutions per second. The slurry in the mold ring shakes to expel air bubbles, reducing waste from the grinding wheel. At the same time, impurities in the slurry are shaken to the upper surface of the slurry for casting. The slurry is poured in along the gap between the outer mold ring and the concentric inner mold ring, avoiding the connecting ribs. Meanwhile, the forming dimensions are measured with a steel ruler to ensure the quality of the grinding wheel forming.

[0018] This setting, with a 50Hz vibration frequency matching the flowability of the molding slurry, allows the slurry to fully fill the cavity and expel air bubbles under vibration, improving density. The slurry is poured in away from the connecting ribs to avoid slurry accumulation or gaps caused by the ribs blocking the flow. A steel ruler measures the molding dimensions in real time, allowing for timely adjustment of the slurry dosage and ensuring that parameters such as the grinding wheel thickness and diameter meet the standards.

[0019] Preferably, the absorbent paper is disposed between the bottom of the outer mold ring and the top of the plasterboard.

[0020] This feature involves placing absorbent paper between the bottom of the outer mold ring and the plasterboard. This paper quickly absorbs the moisture seeping out of the molding slurry and transfers it to the plasterboard (plasterboard has a strong water absorption capacity), accelerating the curing of the slurry. At the same time, the absorbent paper cushions the contact between the mold and the plasterboard, preventing the plasterboard from cracking due to mold pressure.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This new integrated casting mold ring utilizes an innovative structural design of an "outer mold ring + coaxial concentric inner mold ring," along with a sealed bottom on the inner mold ring, to forcibly form a ring-shaped casting space within the cavity, eliminating material filling in the central area. By setting key parameters (inner diameter of the concentric inner mold ring D2 = (1 / 3 - 1 / 2) inner diameter of the outer mold ring D1), it precisely avoids the 15%-20% of ineffective central filling area that needs to be removed in traditional single-cavity mold rings, directly reducing raw material consumption by more than 15%. Against the backdrop of continuously rising prices for raw materials such as white fused alumina and silicon carbide, this significantly reduces raw material procurement costs for enterprises and enhances product market competitiveness.

[0023] On the one hand, the central area requires no filling material, directly eliminating the rough machining process for the ineffective central area in traditional processes. This reduces equipment occupancy time and manual operation steps, significantly shortening the production time for a single batch of grinding wheels. On the other hand, the annular pouring space, combined with the use of bottom gypsum board and absorbent paper, allows the molding slurry to contact the absorbent structure more efficiently, accelerating moisture absorption. Simultaneously, the central hollow design facilitates ventilation and heat dissipation, further promoting the curing of the molding material. Practical application verification shows that compared to traditional mold rings, this new mold ring can shorten the grinding wheel curing time by 8%-12%, significantly improving the overall production efficiency of enterprises and helping to quickly respond to market order demands.

[0024] The mold ring adopts an integrated metal structure (made of steel or cast iron) consisting of an outer mold ring, a concentric inner mold ring, and connecting ribs. This structure offers enhanced stability and avoids the displacement and deformation issues that easily occur during vibration casting in split structures, ensuring the dimensional accuracy of the cavity. Simultaneously, the mold surface is coated with an 8-12μm thick nickel layer, prepared through a chemical plating process. This nickel plating layer possesses excellent corrosion resistance, effectively resisting the erosion of the mold by moisture and chemical components in the molding slurry during casting. This reduces mold corrosion and wear, significantly extending mold life and lowering mold replacement and maintenance costs for enterprises. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the anti-corrosion coating structure in this utility model;

[0027] Figure 3 This is a schematic diagram of the working process of this utility model;

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Outer mold ring; 11. Anti-corrosion coating; 2. Concentric inner mold ring; 3. Connecting rib; 4. Sealing bottom; 5. Plasterboard; 6. Absorbent paper; 7. Shaking table. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides an integrated novel casting mold ring, such as Figure 1 As shown, it includes an outer mold ring 1, and a concentric inner mold ring 2 is provided on the inner side of the outer mold ring 1. The outer mold ring 1 has an annular metal structure. The concentric inner mold ring 2 is arranged coaxially with the outer mold ring 1. A sealing bottom 4 is installed at the bottom of the concentric inner mold ring 2, and the upper part of the concentric inner mold ring 2 is a hollow structure. The outer mold ring 1 and the concentric inner mold ring 2 are evenly distributed with connecting ribs 3 in the circumference. A cavity is formed between the inner wall of the outer mold ring 1 and the outer wall of the concentric inner mold ring 2. The bottom of the outer mold ring 1 is used in conjunction with gypsum board 5 and absorbent paper 6 to form a casting space with an annular cross section in the cavity, so that the central area is not filled with material.

[0032] The main body of the mold is constructed with "outer mold ring 1 as the base and concentric inner mold ring 2 as the core dividing structure". The bottom sealing base 4 of the concentric inner mold ring 2 blocks the molding material from entering the central area. The hollow structure at the top of the concentric inner mold ring 2 does not affect the mold operation and slurry heat dissipation. The circumferentially distributed connecting ribs 3 realize the coaxial fixation of the outer mold ring 1 and the concentric inner mold ring 2 to avoid relative displacement. At the same time, with the addition of plasterboard 5 (support + water absorption) and water-absorbing paper 6 (accelerating moisture conduction), an annular pouring space is formed in the gap between the outer mold ring 1 and the concentric inner mold ring 2, which structurally limits the filling range of the molding material.

[0033] Completely solves the problem of ineffective filling in the center of traditional single-cavity mold rings, ensuring that the central area is not filled with material and reducing raw material waste; the annular pouring space, combined with gypsum board 5 and absorbent paper 6, accelerates the drainage of moisture from the molding material and shortens the curing time; no additional auxiliary tooling is needed to fix the concentric inner mold ring 2, simplifying the mold usage process and improving operational convenience.

[0034] In this embodiment, as Figure 1 As shown, the inner diameter of the outer mold ring 1 is D1, and the inner diameter of the concentric inner mold ring 2 is D2, where D2 = (1 / 3 - 1 / 2) D1.

[0035] Based on the actual grinding requirements of the grinding wheel (the effective grinding area is concentrated on the outer side), the inner diameter of the concentric inner die ring 2 is determined by limiting the parameters (D2=(1 / 3-1 / 2) D1, where D1 is the inner diameter of the outer die ring 1 and D2 is the inner diameter of the concentric inner die ring 2). This ensures that the central hollow area is large enough to save material, while avoiding the concentric inner die ring 2 being too large, which would result in insufficient effective grinding width of the grinding wheel, thus balancing "material saving" and "performance".

[0036] Precise control of the central hollow ratio ensures stable raw material savings without affecting the subsequent grinding function of the grinding wheel; the fixed parameter range provides a basis for standardized mold production, avoids grinding wheel quality fluctuations caused by dimensional deviations of the concentric inner mold ring 2, and improves product consistency.

[0037] Specifically, such as Figure 1 As shown, there are 3-5 connecting ribs 3, which connect the upper part of the outer mold ring 1 and the concentric inner mold ring 2.

[0038] The number of connecting ribs 3 is set to 3-5, which is based on the balance between "structural stability" and "slurry flowability": 3 ribs can meet the basic fixing requirements of the outer mold ring 1 and the concentric inner mold ring 2, and 5 ribs further improve the coaxiality of the two; the connecting ribs 3 are connected to the upper part of the outer mold ring 1 and the concentric inner mold ring 2, which not only avoids the bottom connection from obstructing the laying of absorbent paper 6 and contact with plasterboard 5, but also does not block the slurry pouring channel, ensuring a smooth pouring process.

[0039] Three to five circumferentially distributed connecting ribs 3 can stably fix the outer mold ring 1 and the concentric inner mold ring 2, preventing the concentric inner mold ring 2 from shifting during vibration casting and ensuring the dimensional accuracy of the cavity; the upper connection design does not affect the fit between the mold and the plasterboard 5 and absorbent paper 6, nor does it interfere with the filling of the slurry, taking into account both structural stability and ease of operation.

[0040] Furthermore, the width and length of the connecting bar 3 is w = (5-10)d, where d is the thickness of the connecting bar (3).

[0041] By using the parameter relationship "rib width w = (5-10) d" (where w is the rib width of connecting rib 3 and d is the rib thickness of connecting rib 3), the volume of connecting rib 3 is controlled while ensuring its strength: the rib thickness d determines the basic load-bearing capacity of connecting rib 3, and the rib width can be proportionally enlarged to increase the connection area between connecting rib 3 and outer mold ring 1 and concentric inner mold ring 2, avoiding the breakage of connecting rib 3 due to local stress concentration, and at the same time avoiding the rib body being too wide to block the slurry channel or increase the weight of the mold.

[0042] The connecting rib 3 has a strength and toughness that are matched, and can withstand the impact force during vibration casting, thus extending the service life of the mold. The reasonable rib width design does not affect the uniform filling of the slurry along the gap between the outer mold ring 1 and the concentric inner mold ring 2, reducing molding defects such as material shortage and air bubbles caused by the blocking of the connecting rib 3, and ensuring the integrity of the grinding wheel blank.

[0043] Furthermore, such as Figure 1 , Figure 2 As shown, the outer mold ring 1, the concentric inner mold ring 2 and the connecting rib 3 adopt an integrated metal structure, which is made of steel or cast iron, and the surface is provided with an 8-12μm thick anti-corrosion coating 11.

[0044] The outer mold ring 1, the concentric inner mold ring 2, and the connecting rib 3 adopt an integrated metal structure (steel or cast iron), which is formed by integral processing, eliminating the assembly gap of the split structure and improving the overall rigidity of the mold; an 8-12μm thick anti-corrosion coating 11 covers the surface of the outer mold ring 1, the concentric inner mold ring 2, and the connecting rib 3, forming a dense protective layer, blocking the contact between water and chemical components in the molding slurry and the metal substrate, and reducing corrosion.

[0045] The integrated structure prevents displacement of the separate components (outer mold ring 1, concentric inner mold ring 2, connecting rib 3) during vibration, ensuring stable cavity dimensions and improving grinding wheel dimensional accuracy; the steel or cast iron material ensures wear resistance of the outer mold ring 1, concentric inner mold ring 2, and connecting rib 3, making them suitable for long-term high-frequency use; the anti-corrosion coating 11 effectively reduces mold corrosion, extends service life, and reduces mold replacement costs.

[0046] Furthermore, such as Figure 2 As shown, the anti-corrosion coating 11 is a nickel coating, which is prepared by chemical plating process to improve the corrosion resistance and service life of the mold.

[0047] The anti-corrosion coating 11 is a nickel coating. Nickel coating has excellent chemical stability and can resist corrosion in acid and alkali environments. The nickel coating is prepared by chemical plating process, which can achieve uniform coverage of the outer mold ring 1, the concentric inner mold ring 2 and the connecting rib 3 (including mold corners and gaps). The coating has strong adhesion to the substrate and is not easy to fall off. Compared with other coatings (such as zinc plating), it has better corrosion resistance and wear resistance.

[0048] The nickel plating (anti-corrosion plating 11) ensures that the outer mold ring 1, the concentric inner mold ring 2, and the connecting rib 3 are free from rust and plating peeling in the long-term contact with water-based molding slurry. The chemical plating process ensures uniform plating thickness (8-12μm), avoids corrosion risks caused by excessively thin local plating, further extends the service life of the mold, and reduces the maintenance frequency.

[0049] Furthermore, such as Figure 3As shown, plasterboard 5 is placed on a shaking table 7. The shaking table 7 drives plasterboard 5 to make a circular motion, about 2-5 revolutions per second. The slurry in the mold ring shakes to remove air bubbles and reduce grinding wheel waste. At the same time, impurities in the slurry are shaken to the upper surface of the slurry for casting. The slurry is poured in along the gap between the outer mold ring 1 and the concentric inner mold ring 2, avoiding the connecting ribs 3. Meanwhile, the forming dimensions are measured with a steel ruler to ensure the quality of grinding wheel forming.

[0050] Plasterboard 5 is placed on a vibrating table 7. The frequency matches the flowability of the molding slurry, allowing the slurry to fully fill the cavity formed by the outer mold ring 1 and the concentric inner mold ring 2 under vibration, expelling air bubbles and improving density. The molding slurry is poured in along the gap between the outer mold ring 1 and the concentric inner mold ring 2, avoiding the connecting ribs 3 to prevent slurry accumulation or gaps caused by the ribs blocking the flow. At the same time, the molding dimensions are measured with a steel ruler, allowing for timely adjustment of the slurry dosage to ensure that parameters such as the thickness and diameter of the grinding wheel meet the standards.

[0051] Under the action of the shaking table 7, the grinding wheel blank is free of air bubbles and loose areas, with a dense structure, which improves the grinding strength of the grinding wheel; avoiding the connecting rib 3, the combination of casting and real-time dimensional measurement reduces forming defects, ensures the grinding wheel is dimensionally qualified, and ensures stable product quality.

[0052] Furthermore, such as Figure 3 As shown, absorbent paper 6 is placed between the bottom of the outer mold ring 1 and the top of the plasterboard 5.

[0053] Absorbent paper 6 is placed between the bottom of the outer mold ring 1 and the top of the plasterboard 5. It can quickly absorb the water seeping out of the molding slurry and conduct the water to the plasterboard 5 (plaster has a strong water absorption capacity), thus accelerating the curing of the slurry. At the same time, absorbent paper 6 can buffer the contact between the outer mold ring 1 and the plasterboard 5, preventing the plasterboard 5 from cracking due to mold pressure.

[0054] Improved moisture absorption efficiency shortens the curing time of the grinding wheel, thereby increasing production efficiency; the buffering effect reduces the wear and tear on the gypsum board 5 and lowers the cost of auxiliary materials; the absorbent paper 6 also prevents slurry from leaking into the gypsum board 5, avoiding contamination of the gypsum board 5 and ensuring its absorbency in subsequent use.

[0055] The working process of this integrated casting mold ring during use is as follows:

[0056] (I) Preliminary Preparation Stage

[0057] Mold inspection and assembly: Confirm that the integrated structure of the outer mold ring 1, the concentric inner mold ring 2, and the connecting rib 3 is free from deformation, the sealing bottom 4 fits tightly and seamlessly with the bottom of the concentric inner mold ring 2, and the anti-corrosion coating 11 is undamaged; verify that the inner diameter D1 of the outer mold ring 1 and the inner diameter D2 of the concentric inner mold ring 2 meet the parameter requirement of D2=(1 / 3-1 / 2) D1, and that the number of connecting ribs 3 is 3-5 and evenly distributed circumferentially.

[0058] Auxiliary structure arrangement: As shown in Figure 3, place the gypsum board 5 stably on the shaking table 7 to ensure that the surface of the gypsum board 5 is flat and free of cracks; lay absorbent paper 6 on top of the gypsum board 5. The size of the absorbent paper 6 should cover the bottom contact area of ​​the outer mold ring 1 to avoid subsequent slurry leakage.

[0059] Mold positioning and placement: Place the inspected and qualified integrated mold ring (including outer mold ring 1, concentric inner mold ring 2, connecting rib 3, and sealing bottom 4) on top of absorbent paper 6, adjust the position of the mold ring to ensure that the mold ring is centered and aligned with plasterboard 5 and absorbent paper 6 without offset or tilt.

[0060] (II) Casting and Molding Stage

[0061] Start the shaking table: Turn on the shaking table 7 and adjust the vibration frequency to 50Hz to keep the shaking table running stably, in preparation for subsequent slurry filling and venting.

[0062] Slurry pouring operation: Use a slurry spoon to slowly pour the flowing grinding wheel forming slurry into the annular gap between the outer mold ring 1 and the concentric inner mold ring 2. During the pouring process, avoid the position of the connecting rib 3 to prevent the slurry from being blocked by the connecting rib 3 and causing local voids. At the same time, use a steel ruler to measure the slurry filling height in real time to ensure that the forming size meets the grinding wheel design requirements.

[0063] Real-time venting and compaction: Under 50Hz vibration, air bubbles in the slurry are discharged upward with the vibration, and the slurry flows fully and fills the cavity densely; continuously observe the slurry state, and if local air bubble accumulation or uneven filling is found, the pouring speed can be adjusted appropriately or the mold ring position can be slightly adjusted to ensure the uniformity of the blank.

[0064] (III) Curing and Demolding Stage

[0065] Curing process: After pouring, keep the shaking table 7 running for 5-10 minutes (adjust according to the characteristics of the slurry) to ensure that the slurry is completely compacted; then turn off the shaking table and let the molding slurry cure naturally with the cooperation of the mold ring, plasterboard 5, and absorbent paper 6. During this period, absorbent paper 6 and plasterboard 5 continuously absorb moisture from the slurry, accelerating the curing process.

[0066] Demolding preparation: After the slurry has cured to a certain strength (usually 2-4 hours, depending on the ambient temperature and humidity), check the fit between the grinding wheel blank and the inner wall of the die ring to confirm that the blank is not loose or cracked.

[0067] Demolding operation: Hold both sides of the outer mold ring 1 with both hands and slowly lift the mold ring upwards. Since the top of the concentric inner mold ring 2 is hollow and the blank is not excessively adhered to the inner wall of the mold ring, the mold ring can be easily separated from the grinding wheel blank. After demolding, take out the grinding wheel blank to complete one casting process.

[0068] (iv) Subsequent cleanup and maintenance

[0069] Mold cleaning: After demolding, wipe the inner and outer walls of the outer mold ring 1, the concentric inner mold ring 2, and the sealing bottom 4 with a clean cloth to remove residual slurry. If there are stubborn stains, you can gently wipe them with a small amount of water to avoid damaging the anti-corrosion coating 11.

[0070] Auxiliary structure replacement: Replace the used absorbent paper 6, check whether there is any slurry residue on the surface of the gypsum board 5. If the water absorption capacity of the gypsum board 5 decreases or the surface is damaged, replace it with a new gypsum board 5 in time to prepare for the next pouring.

[0071] Mold maintenance: Regularly inspect the anti-corrosion coating 11 of the mold. If wear or peeling of the coating is found, chemical nickel plating should be performed in time. When storing the mold, avoid collision and squeezing, keep the mold dry and ventilated, and extend the overall service life of the mold.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel integrated casting mold ring, comprising an outer mold ring (1), characterized in that: The outer mold ring (1) is provided with a concentric inner mold ring (2) on its inner side. The outer mold ring (1) has an annular metal structure. The concentric inner mold ring (2) is arranged coaxially with the outer mold ring (1). A sealing bottom (4) is installed at the bottom of the concentric inner mold ring (2). The upper part of the concentric inner mold ring (2) is a hollow structure. The outer mold ring (1) and the concentric inner mold ring (2) are evenly distributed with connecting ribs (3) in the circumference. A cavity is formed between the inner wall of the outer mold ring (1) and the outer wall of the concentric inner mold ring (2). The bottom of the outer mold ring (1) is used in conjunction with gypsum board (5) and absorbent paper (6) to form a casting space with an annular cross section in the cavity, so that the central area is not filled with material.

2. The integrated novel casting mold ring according to claim 1, characterized in that: The inner diameter of the outer mold ring (1) is D1, and the inner diameter of the concentric inner mold ring (2) is D2, where D2 = (1 / 3 - 1 / 2) D1.

3. The integrated novel casting mold ring according to claim 1, characterized in that: The number of connecting ribs (3) is 3-5, which are connected to the upper part of the outer mold ring (1) and the concentric inner mold ring (2).

4. The integrated novel casting mold ring according to claim 3, characterized in that: The width and length of the connecting bar (3) is w = (5-10)d, where d is the thickness of the connecting bar (3).

5. The integrated novel casting mold ring according to claim 1, characterized in that: The outer mold ring (1), the concentric inner mold ring (2) and the connecting rib (3) adopt an integrated metal structure, made of steel or cast iron, and the surface is provided with an 8-12μm thick anti-corrosion coating (11).

6. The integrated novel casting mold ring according to claim 5, characterized in that: The anti-corrosion coating (11) is a nickel coating, which is prepared by chemical plating process to improve the corrosion resistance and service life of the mold.

7. The integrated novel casting mold ring according to claim 1, characterized in that: The gypsum board (5) is placed on the shaking table (7). The shaking table (7) drives the gypsum board (5) to make a circular motion, about 2-5 revolutions per second. The slurry in the mold ring shakes to expel air bubbles and reduce the waste of the grinding wheel. At the same time, the impurities in the slurry are shaken to the upper surface of the slurry and poured into the mold. The slurry is poured in along the gap between the outer mold ring (1) and the concentric inner mold ring (2) and avoids the connecting ribs (3). At the same time, the molding size is measured by a steel ruler to ensure the molding quality of the grinding wheel.

8. The integrated novel casting mold ring according to claim 7, characterized in that: The absorbent paper (6) is placed between the bottom of the outer mold ring (1) and the top of the plasterboard (5).

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