Diamond anvil cell hinge beam casting system

Abstract

This utility model discloses a diamond press hinge beam casting system, comprising: a core assembly molding system and a gating system. The core assembly molding system uses manual core box making, with partial covering using chromite sand. The core assembly includes multiple sets of outer cores, rod cores, and a central core. The outer skin uses a carbon dioxide ester hardened water glass sand process applied in a molding production line, employing a 3-box + 1-box combination. The gating system combines bottom casting and riser casting. The bottom casting uses a one-to-four reverse pouring method, and the riser casting uses a T-shaped tee method. This utility model meets the casting precision requirements of the product, reduces mold making costs, shortens the production cycle, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of diamond press production, and in particular to a diamond press hinge beam casting system. Background Technology

[0002] The hinge beam is a crucial component of a synthetic diamond press, and its quality directly impacts the press's lifespan, making it vital for diamond production companies. To ensure the performance requirements of the hinge beam, in accordance with product standards JB / T6402-2018 "Technical Conditions for Large Low-Alloy Steel Castings" and GB / T723.2-2010 Class I ultrasonic testing, each batch requires tensile and impact tests, as well as ultrasonic testing. Only after passing all tests can the batch be inspected and shipped to the user.

[0003] During the product trial production process, the product was tested and encountered problems such as difficulty in parting and demolding, as well as cracks and sand adhesion in some areas after casting heat treatment, making it difficult to guarantee performance requirements and meet design requirements. Utility Model Content

[0004] The purpose of this utility model is to provide a diamond press hinge beam casting system, which effectively solves the operational difficulties such as difficult parting and demolding of large and complex castings, as well as casting defects such as cracks and sand adhesion. It meets the casting precision requirements of products, reduces mold making costs, shortens the production cycle, and improves production efficiency.

[0005] The technical solution is as follows:

[0006] The diamond press hinge beam casting system includes a core-forming system and a gating system. The core-forming system uses manual core boxes for core making, with partial covering using chromite sand. The core assembly includes multiple sets of outer cores, rod cores, and a central core. The outer skin is produced using a carbon dioxide ester-hardened water glass sand process on the molding production line, employing a 3-box + 1-box combination. The gating system combines bottom casting and riser casting. Bottom casting uses a one-to-four reverse pouring method, while riser casting uses a T-shaped tee system.

[0007] Furthermore, a handmade core-making process is adopted, with the outer core being assembled at 90°, and the upper and lower parts being molded on the hinge beam lugs, with the upper part of the hinge beam lugs being an integral shape.

[0008] Furthermore, the central core is covered with chromite sand to a thickness of 50mm, and the center is a cage-like core frame wrapped with straw rope. Place dry sand in the designated area.

[0009] Furthermore, the gating system employs a combination of bottom casting and riser casting. The bottom casting uses a one-to-four reverse pouring gating system with an open 120° bell-shaped opening. The upper riser gating system uses a T-junction to directly enter the riser.

[0010] Furthermore, the riser of the gating system is an inverted bell mouth, and the riser runner is located at 1 / 2 of its height.

[0011] This utility model has the following advantages compared with the prior art:

[0012] This invention effectively solves the operational difficulties such as difficult parting and demolding of large and complex castings, as well as casting defects such as cracks and sand adhesion. It meets the casting precision requirements of products, reduces mold making costs, shortens the production cycle, and improves production efficiency.

[0013] The 3-box + 1-box molding process solves the parting problem in the product molding process to the greatest extent. The height requirement of the sand box during the parting process is more conducive to standardization, which helps to improve production efficiency and achieve the goal of mass production.

[0014] The core assembly process has been further optimized to ensure product consistency and reduce defects such as misalignment, defects, and sand inclusions caused by multiple molding processes. The sand molds are placed sequentially, which improves dimensional accuracy. Simultaneously, the carbon dioxide-carbon ester hardening process for water glass has been changed during molding, solving the problem of insufficient compaction caused by difficulty in controlling the hardening time when placing chromite sand in key areas of the ester-hardened water glass.

[0015] The casting system employs a combination of bottom casting and riser pouring, ensuring that the molten steel rises sequentially during pouring. The use of four inch gates guarantees a smooth pouring process, and the open, flared gates reduce erosion of the sand mold. An additional gating system at the riser allows for later feeding to compensate for shrinkage, ensuring product density. This change in the casting system results in a more stable casting process compared to traditional hinge beams, significantly reducing defects such as sand holes, porosity, and shrinkage cavities in the casting. Attached Figure Description

[0016] Figure 1 A schematic diagram of the front of the housing of the diamond press hinge beam casting system;

[0017] Figure 2 A schematic diagram of the lower box of the diamond press hinge beam casting system;

[0018] Figure 3 A schematic diagram of the front of the hinge beam of a diamond press;

[0019] Figure 4 This is a schematic diagram of the reverse side of the hinge beam of a diamond press. Detailed Implementation

[0020] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.

[0021] refer to Figure 1-4 The diamond press hinge beam casting system includes a core-forming system and a gating system. The core-forming system uses manual core boxes for core making, with partial covering using chromite sand. The core assembly includes multiple sets of outer cores, rod cores, and a central core. The outer skin uses a carbon dioxide ester-hardened water glass sand process on the molding production line, employing a 3-box + 1-box combination. The gating system combines bottom casting and riser casting. The bottom casting uses a one-to-four reverse pouring method, and the riser casting uses a T-shaped tee system.

[0022] The core assembly system uses the lower sand box as a reference for positioning, and the lower cores are assembled in sequence. The middle sand box plays a fixing role and there is no product boxing structure design. The upper sand box plays a role in supporting the riser. During pouring, only the top surface of the product is involved. A riser box is added on top of the upper sand box to meet the riser pouring height.

[0023] The gating system adopts a combination of bottom casting and riser casting. The bottom casting adopts a one-to-four reverse pouring method, and the riser casting adopts a T-shaped tee method.

[0024] The central ventilation system is a bottom-side ventilation system with an open bottom structure.

[0025] The No. 9 sand mold in the center uses a combination of chromite sand and water glass sand to solve the problem of sand adhering to the inner wall. The center adopts a hollow design to maximize the yielding of the sand core.

[0026] Computer simulation effectively guides the hot spots of the component through three-dimensional simulation and ensures that there are no hot spots in the solid according to the principle of sequential solidification. At the same time, a 600mm×900mm diameter insulating riser is placed. The riser adopts an insulating sleeve and adopts a riser structure with a larger top and smaller bottom to ensure the insulation effect of the riser. The riser is also spot-cast in the later stage of pouring.

[0027] Based on simulation results and empirical calculations, the product structure was analyzed, resulting in a 3-box + 1-box product structure pattern. Nine core boxes were to be fabricated, and three sets of models for the outer shell were to be made using the carbon dioxide ester hardening water glass process. After fabrication, the shaping process was carried out, with three coats of alcohol-based ester hardening coating applied, ensuring a coating thickness of no less than 1mm.

[0028] During molding, precast gating pipes are placed according to different boxes. The bottom box is designed with a 5-way conversion, the middle box and sand box are straight-through, and the riser box is a 3-way conversion into the riser. The ingate opening is made into an open flared mouth, flush with the bottom surface of the sand mold.

[0029] During core placement, cores 5, 6, 7, and 8 are placed sequentially after the sand box preparation is complete, followed by cores 1, 2, 3, and 4, and then core 9. Then, the inner sand box, upper sand box, and riser box are assembled. During core placement and assembly, the dimensions of each part are checked to ensure dimensional accuracy, and loose sand is blown away to ensure proper assembly.

[0030] After all the casting boxes are assembled, casting is carried out. During casting, molten steel enters from the bottom gate and rises rapidly to the T-sprue of the riser. Under pressure, the molten steel enters the riser laterally from the T-sprue, maximizing the riser temperature and ensuring that the casting solidifies sequentially during shrinkage.

[0031] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A diamond press hinge beam casting system, characterized in that, include: The core molding system and the gating system are as follows: The core molding system uses manual core box making, with partial covering using chromite sand. The core assembly includes multiple sets of outer cores, rod cores, and central cores; The outer skin uses a carbon dioxide ester hardened water glass sand process applied in the molding production line, in a 3-box + 1-box combination; The gating system uses a combination of bottom casting and riser casting. The bottom casting uses a one-to-four reverse pouring method, and the riser casting uses a T-shaped tee method.

2. The diamond press hinge beam casting system as described in claim 1, characterized in that, It adopts a handmade core-making process, with the outer core being assembled at 90°. The upper and lower parts are molded on the hinge beam lugs, and the upper part of the hinge beam lugs is an integral shape.

3. The diamond press hinge beam casting system as described in claim 1, characterized in that, The central core is covered with chromite sand with a thickness of 50mm. The center is a cage-like core frame wrapped with straw rope, and dry sand is placed at the center φ120.

4. The diamond press hinge beam casting system as described in claim 1, characterized in that, The gating system adopts a combination of bottom casting and riser casting. The bottom casting uses a one-to-four reverse pouring gating system with an open 120° bell mouth. The upper riser casting gating system uses a T-shaped tee to directly enter the riser.

5. The diamond press hinge beam casting system as described in claim 1, characterized in that, The riser of the gating system is an inverted bell mouth, and the riser runner is located at 1 / 2 of its height.

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