Small inclined drum shot blasting machine
The small inclined drum shot blasting machine is a highly efficient device suitable for surface cleaning, rust removal, oxide scale removal and strengthening of small hardware parts in large quantities.
I. Working Principle of Small Inclined Drum Shot Blasting Machine
The core working principle of the inclined drum shot blasting machine can be summarized as follows: Through a tiltable and tiltable drum, the workpiece is continuously rolled inside the drum and simultaneously subjected to high-speed shot impacts from all directions, thereby achieving uniform and efficient surface treatment.
The working process of a small inclined drum shot blasting machine can be decomposed into the following key steps:
Loading materials
The operator loads the hardware parts to be processed (such as screws, nuts, chains, stamping parts, castings, etc.) into the drum.
The drum is currently in the inclined "loading/unloading" position with the opening facing upwards, which is convenient for operation.
Closing the door and sealing
Close the door of the drum. The equipment will automatically or manually seal it to prevent the shot and dust from leaking out during the ejection process.
Start and Roll
When the equipment starts up, the drum begins to rotate at a constant speed around its central axis.
Inside the drum, there are usually guide ribs. When the drum rotates, these ribs will lift the workpiece to a certain height. Then, under the effect of its own gravity, the workpiece will fall like a "waterfall", thus achieving continuous and uniform rolling.
Shot blasting cleaning
Meanwhile, the shot blasting machine starts. The shot blasting machine ejects the shot at an extremely high speed through the high-speed rotating impeller. As the workpiece constantly rolls inside the drum, its entire surface has the opportunity to be exposed within the impact range of the shot flow, ensuring no dead corners and uniformity in the treatment.
Projectile circulation and separation
The mixture of the ejected pellets and the removed oxide scale, sand grains, dust, etc. is collected by the screw conveyor at the bottom of the machine. The mixture is sent to the elevator and lifted to the separator at the top. The separator uses the principle of air separation to separate the intact and reusable pellets from the crushed pellets and dust. Good shot is returned to the shot blasting machine for continued use, while waste is discharged and collected. This process ensures shot blasting efficiency and cleaning quality, and reduces abrasive consumption.
Unloading
When the processing time reaches the preset value, the shot blasting machine and the drum stop running.
The entire drum mechanism is inclined forward (this is where the name "inclined" comes from), and the drum opening is aligned with the unloading area (such as the material basket, vibrating conveyor or conveyor belt).
The drum rotates in the opposite direction, and the spiral guide plate inside or by utilizing gravity, smoothly and quickly discharges the processed workpiece.
Ii. Detailed Introduction of Small Inclined Drum Shot Blasting Machine
1. Main components of the equipment
Roller system
Drum body: Made of wear-resistant steel plate, it is equipped with wear-resistant guard plates and guide rib plates inside to ensure the effective rolling of the workpiece and protect the drum body.
Drive unit: Composed of a motor, a reducer, etc., it drives the roller to rotate smoothly.
Tilting mechanism: Usually driven by hydraulic cylinders or pneumatic cylinders, it enables the tilting switch of the drum between the working and unloading positions.
Shot blasting system
Shot blasting machine: The heart of the equipment, composed of vulnerable parts such as impellers, shot distribution wheels, directional sleeves, and guard plates. Its performance and quality directly determine the efficiency and effect of shot blasting.
Shot: Select based on the material of the workpiece and processing requirements, such as cast steel shot, wire cut shot, stainless steel shot, etc.
Recycling and separation system
Screw conveyor: Located at the bottom of the machine, it is responsible for collecting used pellets and impurities.
Elevator: Lifts the mixture vertically to the separator.
Shot and sand separator: Core purification device, ensuring the cleanliness of the circulating shot.
Dust removal system
It is composed of a dust removal fan, filter cartridges (or bags) and a pulse reverse blowing dust cleaning device, which is used to absorb the dust generated during the separation process to ensure a clean working environment and meet environmental protection requirements.
Electronic control system
The PLC and touch screen human-machine interface are used to control the entire workflow, such as setting shot blasting time, drum speed, and monitoring equipment status, etc.
2. Prominent features and advantages of the small inclined drum shot blasting machine
Uniform processing: The workpiece rolls at multiple angles in a sealed drum, ensuring that all surfaces, including inner holes and threads, are processed evenly.
High production efficiency: It can load a large number of workpieces at one time, has a high degree of automation, and can load and unload materials quickly, making it suitable for large-scale continuous production.
Protecting workpieces: Workpieces are separated by shot "soft pads", reducing the impact caused by mutual collisions. It is particularly suitable for parts that are afraid of scratches but still need to be cleaned.
High degree of automation: From loading to unloading, the entire process can be completed automatically, with low labor intensity.
Environmental protection and energy conservation: Sealed operation, no dust overflow; The pellets are recycled and have low consumption.
3. Applicable workpiece range
It is highly suitable for batch processing of small-sized hardware parts that are not prone to entanglement and are not afraid of collision, such as
Standard parts: screws, bolts, nuts, washers
Stamping parts
Small castings and forgings
Gears, chains
Metal handicrafts
Engine connecting rods, valves, etc
4. Limitations of inclined drum shot blasting machines
Not suitable for: particularly long, particularly flat, easily entangled or particularly precise workpieces, as they may deform or get stuck with each other during rolling.
The size of the workpiece is limited: The volume of the drum determines the maximum size and quantity of workpieces that can be processed at one time.
Summary
The inclined drum shot blasting machine is a well-designed, mature and highly efficient surface treatment equipment. It perfectly solves the uniformity and efficiency problems of surface treatment for a large number of small hardware parts through the organic combination of "rolling" and "throwing". If it is precisely this type of workpiece that you need to handle, then the inclined drum shot blasting machine is undoubtedly a very ideal choice.