Where is the high-precision molding ability of electronic scale molds reflected
The high-precision molding capability of electronic scale molds is the core foundation for ensuring the flatness of the scale surface, sensor adaptation, clear scale, and seamless assembly. The core is reflected in four core dimensions: dimensional tolerance control, molding stability, detail molding accuracy, and material adaptation accuracy, as follows:
The high-precision molding capability of electronic scale molds is the core foundation for ensuring the flatness of the scale surface, sensor adaptation, clear scale, and seamless assembly. The core is reflected in four core dimensions: dimensional tolerance control, molding stability, detail molding accuracy, and material adaptation accuracy, as follows:
1、 Super accurate control of core dimensions, meeting the core requirements of electronic scale functions
The weighing accuracy of electronic scales depends on the correct basic dimensions of the mold forming, which is the core manifestation of high-precision forming and directly determines the correctness of weighing data.
Tolerance control of benchmark dimensions on the scale surface: The length, width, and height tolerances of the scale surface are stably controlled within ± 0.02mm, and the flatness error is ≤ 0.01mm/100mm, to prevent unevenness and warping of the scale surface, avoid weighing deviation caused by uneven force on the sensor, and ensure the accuracy of weighing the full range of 5g-30kg.
High precision installation and positioning structure: The sensor installation groove and screw hole position formed by the mold have a coaxiality of ≤ 0.015mm and a hole spacing tolerance of ± 0.01mm, ensuring that the sensor and motherboard are correctly embedded and fixed without looseness or offset, and eliminating the influence of assembly clearance on weighing sensitivity.
Uniform and consistent cavity depth: The depth tolerance of the scale body groove, frame step and other structures is ≤ 0.01mm, ensuring that the force points on the scale surface are uniform when subjected to force, and avoiding deformation and weighing errors caused by local stress concentration.
2、 High precision detail molding, balancing functionality and appearance adaptation
The electronic scale mold needs to balance the formation of small structures with neat appearance, and high precision in details is the key manifestation of molding ability, adapting to the lightweight design requirements of electronic scales.
Precision of integrated scale/identification molding: embedded scale, enterprise identification and other small patterns, mold cavity pattern depth tolerance ± 0.005mm, clear and no fuzzy or rough edges after molding, no need for secondary polishing, and wear-resistant and not easy to fall off, suitable for long-term use of electronic scales.
Proper Forming of Thin Wall Structure: The wall thickness of the lightweight electronic scale body is mostly controlled between 1.2-2.0mm, and the mold can achieve a wall thickness tolerance of ± 0.008mm. After forming, there is no uneven wall thickness, shrinkage marks, or bubbles, which ensures the lightweight of the scale body while also considering structural strength and avoiding thin-walled fractures.
Refined corner forming: The tolerance of the rounded corners and edge chamfers on the scale surface is ≤ 0.01mm. After forming, the corners are smooth without burrs or chipping, which not only improves the appearance texture but also avoids scratches during use. At the same time, it ensures stable stress at the corners and does not affect the weighing accuracy.
3、 Strong molding stability and high consistency in batch production accuracy
High precision molding not only ensures single-mode accuracy, but also enables stable output in batches. This is the core capability of electronic scale mold mass production adaptation, eliminating product defects caused by batch differences.
Multi cavity synchronous molding accuracy: Electronic scale molds often adopt 2-cavity and 4-cavity designs, with a dimensional deviation of ≤ 0.01mm for each cavity molded part, ensuring that the scale bodies produced in the same batch but different cavities are completely consistent, suitable for large-scale assembly production, and do not require additional sorting adjustments.
Long term stable production accuracy: The mold is strengthened by heat treatment, and the cavity hardness reaches HRC58-62, which is wear-resistant and corrosion-resistant. It can continuously produce more than 100000 molds without significant drift in dimensional tolerances. The accuracy attenuation is ≤ 0.003mm, greatly reducing the frequency of mold repair and ensuring mass production efficiency.
Molding process adaptation accuracy: Suitable for different processes such as injection molding and die casting, the mold temperature control system controls the temperature correctly (temperature difference ± 1 ℃), ensuring uniform filling of the melt mold, no shrinkage deformation or residual internal stress of the molded parts, and can be directly assembled without correction, improving the yield rate to above 99.5%.
4、 Material adaptation with high precision, suitable for multi material molding and strong adaptability
The body of electronic scales is commonly made of materials such as ABS, PC, PC/ABS alloy, stainless steel, etc. The mold needs to be adapted to the characteristics of different materials to achieve high-precision molding, while also considering durability and adaptability.
Plastic material molding accuracy: For plastics such as ABS and PC, the polishing accuracy of the mold cavity reaches Ra0.02 μ m. After molding, the scale surface is smooth and flawless, without flow marks or welding marks, and the demolding is smooth without sticking to the mold, ensuring the flatness and appearance texture of the plastic scale body.
Metal die-casting/stamping accuracy: Electronic scale molds made of stainless steel and aluminum alloy materials have a stamping/die-casting cavity tolerance of ≤ 0.01mm. After forming, the metal scale surface is free of deformation and scratches, with a surface roughness Ra of ≤ 0.03 μ m. It is suitable for subsequent electroplating and spraying processes, and has no gaps when assembled with plastic parts.
Composite material adaptation accuracy: For electronic scales with plastic+metal inlay structures, the mold reserves inlay positioning positions with a positioning tolerance of ± 0.008mm to ensure that the inlay parts are correctly fitted and there are no looseness or gaps after molding, ensuring the stability and weighing accuracy of the composite structure.
5、 Adapt assembly accuracy to ensure overall stability of electronic scale performance
The high precision of mold formed parts serves the overall assembly and use of electronic scales, and the adaptability accuracy is an extension of the molding ability, eliminating assembly hazards.
Seamless component adaptation: The fit gap between the mold formed scale body and scale cover, base and frame is ≤ 0.02mm, and the fit surface is tightly fitted without looseness or abnormal noise. The waterproof rubber strip installation groove is correctly adapted to ensure the waterproof performance of the electronic scale (up to IP65 level).
Correct circuit adaptation: The dimensions of the motherboard card slot and wiring slot formed by the mold are correct, with a slot width tolerance of ± 0.01mm, ensuring smooth insertion of the motherboard and wiring without compression or jamming, and avoiding circuit damage that affects the normal reading of the electronic scale.
Load bearing adaptability and stability: The load-bearing support structure formed by the mold has the correct size and the force point matches the sensor sensing range. After forming, the load-bearing structure has no stress deformation, ensuring that the electronic scale maintains accuracy even after long-term load-bearing without data drift.
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