Introduction of Kunshan Huaguanshen Machinery: How to choose a suitable rotary split automatic sandblasting machine?

To select a suitable rotary split automatic sandblasting machine, it is necessary to match the key parameters and functions of the equipment around four core dimensions: workpiece characteristics, process requirements, production capacity target, cost and maintenance. The specific selection steps and key points are as follows:

Determine the core specifications of equipment according to the characteristics of workpiece

Workpiece size and weight

① Small precision parts (such as electronic product hardware and hardware fittings): choose equipment with small working station diameter and high segmentation accuracy, the diameter of working station disk surface is recommended to be ≤800mm, and the bearing capacity of a single working station is ≤5kg, and the adaptive fixture is finely fixed to avoid workpiece displacement during sandblasting.

② Medium-sized hardware (such as automobile parts and household appliance shells): it needs to be matched with a large-diameter turntable, with a disk surface diameter of 1000-2000mm and a single-station bearing capacity of 10–50 kg. At the same time, it is required that the slewing mechanism has strong stability to prevent station deviation under heavy load.

③ Special-shaped parts/complex curved parts: equipment with multi-spray guns and multi-angle layout is preferred, and the spray guns can adjust the angle (0–90) to ensure that all surfaces of the workpiece can be evenly sandblasted.

Workpiece material and sandblasting requirements

① Brittle materials (such as aluminum alloy and zinc alloy): choose low-pressure sand blasting machine (working pressure is 0.2-0.4MPa) with fine abrasive (120-200 mesh glass beads) to avoid workpiece deformation or surface erosion.

② Hard materials (such as stainless steel and carbon steel): high-pressure sand blasting machine (0.5–0.8 MPa) is required, and abrasive materials such as brown corundum and white corundum (80–120 mesh) are selected to meet the requirements of descaling and surface strengthening.

③ High-precision surface treatment (such as hardware matte and wire drawing effect): The repeated positioning accuracy of the equipment is required to be ≤±0.1mm, and the spray gun is servo-driven, which can accurately adjust the spraying distance and angle.

Select the splitting station and speed according to the capacity demand.

Small-batch and multi-variety production: Choose equipment with 6-8 stations, which has a wide adjustable range of rotation speed (5-20r/min), supports rapid die change and fixture change, and adapts to the scene of frequent workpiece switching.

Large-scale production: The machine with 12-24 stations is required, equipped with continuous rotation or intermittent high-speed separation function, and the single-cycle sandblasting time is ≤10s. At the same time, the loading and unloading manipulator can be docked to realize auto production line operation.

Note: the number of stations should match the time of sandblasting process, so as to ensure that the residence time of the workpiece in the sandblasting station can meet the requirements of surface treatment, and avoid incomplete sandblasting due to too fast rotation speed.

Match key functional modules to meet the requirements of process and environmental protection.

Selection of sandblasting system

① The number of spray guns: according to the surface area of the workpiece and the sand blasting efficiency, 1-2 spray guns/stations are selected for small parts, and multiple spray guns are required for medium parts; Give priority to the model with independent pressure adjustment of the spray gun to meet the differentiated sandblasting requirements of complex workpieces.

② Automatic abrasive circulation: choose an integrated system with abrasive screening, dust removal and recycling to reduce the frequency of manual feeding and dust pollution; The capacity of abrasive bin should match the production capacity to avoid frequent shutdown and feeding.

Dust removal and environmental protection configuration

① There is a large amount of dust in hardware sandblasting, so it is necessary to equip with a high-voltage pulse dust removal system, and the filtering accuracy of the filter cartridge shall be ≥0.3μm to ensure that the dust emission concentration meets the environmental protection standard (≤ 10 mg/m).

(2) The closed cabin is designed, and the door is equipped with sealing strips to prevent dust from leaking out during sandblasting; For the fine sand blasting scene, the model with dust-free sand blasting room can be selected.

control system

① Conventional production: PLC+touch screen control is selected, which supports parameter storage (10–20 groups of sandblasting process parameters can be preset), and the workpiece formula can be switched with one button.

② High-precision automatic production: it needs to be equipped with servo motor-driven rotary divider and CCD visual positioning to realize automatic alignment of spray guns and ensure the consistency of sandblasting of batch workpieces.

Evaluate equipment stability, maintenance cost and after-sales service.

Core component quality

Rotary divider is the core of the equipment, and cam divider (not gear divider) is preferred, which requires high dividing accuracy, low noise (≤75dB) and long service life (≥ 10,000 hours of trouble-free operation). Famous brands should be selected for motors and fans to ensure long-term stable operation.

Maintenance convenience

① Sufficient maintenance space shall be reserved for the equipment, and the wearing parts such as spray guns, nozzles and filter cartridges shall be easily disassembled;

② Wearable parts (nozzles, seals, separator lubricating oil) need to be universal, with low procurement cost to avoid high maintenance cost in the later period.

after-sales service

Select the manufacturers with after-sales service outlets nearby to ensure timely response to equipment failures; The manufacturer is required to provide free installation, debugging and operation training, and provide a 1-2 year warranty period.

Combine budget and cost performance to avoid over-allocation.

Small and medium-sized enterprises, small batch production: select standard rotary sandblasting machine, the function can meet the basic sandblasting demand, and there is no need to configure high-end automation module to control the procurement cost.

Large-scale mass production and high-precision requirements: Choose customized models, which can customize the station layout, spray gun angle and automatic feeding and discharging system according to the characteristics of workpieces, so as to improve production efficiency and product consistency.