I. Diagnosis of the root cause of vibration

 

1.1 Mechanical vibration (accounting for 45% of the causes of failure)

· Impeller dynamic balance failure (＞0.5mm/kg needs to be corrected)

· Bearing clearance exceeds the standard (radial clearance＞0.15mm)

· Coupling centering deviation (angle error ≥0.05mm/m)

 

1.2 Fluid dynamic vibration (accounting for 35% of the causes of failure)

· Cavitation phenomenon (NPSHa＜NPSHr+0.5m)

· Eddy current excitation (risk surges when flow rate＞2.5m/s)

· Medium gas content exceeds the standard (＞5% volume ratio)

 

1.3 Structural resonance (accounting for 20% of the causes of failure)

· Natural frequency and speed frequency coincide (±10% danger zone)

· Pipeline support spacing is too large (carbon steel pipe＞3m without support)

 

II. On-site investigation process

1. Vibration value detection: If ＞4.5mm/s, then (spectrum Analysis)

2. Determine whether it is high-frequency vibration?

3. If yes: check bearings/gears

If not: check whether it is low-frequency vibration?

4. If it is low-frequency vibration: check impeller/coupling

If it is not low-frequency vibration: check fluid system

 

III.  solutions

3.1 Mechanical adjustment

Impeller G6.3 dynamic balancing (residual imbalance <8g)

Use laser alignment instrument for correction (error control within 0.02mm)

 

3.2 System optimization

Add inducer to improve cavitation

Install damper at outlet (rubber flexible joint recommended)

3.3 Intelligent monitoring

Install wireless vibration sensor (recommended 100Hz sampling rate)

Establish vibration trend map (warning value set to 4.5mm/s of ISO10816-3)

 

IV. Preventive maintenance plan

Weekly: Check anchor bolt torque (M20 bolts require 450N·m)

Monthly: Lubricating oil particle size detection (within NAS Class 8)

Yearly: Perform modal analysis to verify structural natural frequency

 

The strong oxidizing property (ORP＞+1000mV) and crystallization tendency of sodium chlorate solution make it a "pumping killer", while the fluorine-lined pump reinforced with ultra-high molecular weight polyethylene (UHMWPE) has achieved a breakthrough performance improvement through material composite innovation.

 

① Performance leap brought by material composite

 

1. Anti-wear revolution

 

1.1 The addition of UHMWPE (molecular weight ≥3 million) increases the wear resistance by 8 times (ASTM D4060 test)

 

1.2 The ability of the impeller edge to resist particle erosion is 3.2 times that of the ordinary F46 pump (actual measurement under the condition of 15% concentration containing crystal slurry)

 

2. Temperature-corrosion synergistic resistance

Temperature range	Pure F46 performance	UHMWPE Enhanced Performance
Below 80℃	Annual corrosion: 0.008mm	0.005mm
80-120℃	Prone to stress cracking	Maintaining the complete lattice structure
Short-term exposure up to 150°C	Irreversible deformation	Can withstand 4 hours of thermal shock

 

② Comparison of key engineering parameters

 

1. Life cycle:

 

1.1 Continuous operation time: 8000h for ordinary fluorine-lined pump vs 25000h for ultra-high molecular fluorine-lined pump

 

1.2 Overhaul interval extended to 5 years (under sodium chlorate crystallization conditions)

 

2. Energy efficiency performance:

 

2.1 Volumetric efficiency > 92%

2.2 Save 15-18% electricity compared to ordinary fluorine-lined pumps

 

③ Full cost economic verification

 

1. Initial investment:

40% lower than Hastelloy pumps and 25% higher than ordinary fluorine-lined pumps

 

2. Comprehensive benefits:

 

2.1 Spare parts consumption reduced by 60%

 

2.2 Sudden downtime losses reduced by 92%

 

Case study: After a company in Jiangxi used this pump type to transport sodium chlorate, the annual maintenance cost of a single line was reduced from 280,000 to 65,000, and the production capacity was increased by 23%. (China Chlor-Alkali Industry Association 2025 Blue Book) This case can be found.

Cryogenic Deflashing is a Good Method for Rubber Deflashing

 

Cryogenic deflashing is considered a good method for rubber deflashing due to several reasons:

1.     Precision: Cryogenic deflashing process is a controlled process that can remove flash from rubber components with high precision. It targets the unwanted excess rubber precisely without damaging the desired part geometry. This ensures consistent and accurate results.

2.     Non-destructive: Cryogenic deflashing machine is a non-destructive process, meaning it does not damage or weaken the rubber components during deflashing. This is important for maintaining the structural integrity and functionality of the parts.

3.     Versatility: Cryogenic deburring can be used for a wide range of rubber components, regardless of their shape, size, or complexity. It is suitable for both simple and intricate parts, making it a versatile option for various rubber products.

4.     Efficient: nitrogen shotblast deflashing is a relatively fast process, allowing for high-volume production. The use of liquid nitrogen or other cryogenic media rapidly freezes the rubber parts, and subsequent tumbling or blasting breaks off the flash, ensuring efficient deflashing.

5.     Environmentally-friendly: Cryogenic rubber deflashing is an environmentally-friendly process compared to traditional deflashing methods. It does not involve the use of harsh chemicals or generate harmful waste. Cryogenic media, such as liquid nitrogen, evaporates during the process, leaving no residue behind.

6.     Cost-effective: While cryogenic shotblast deflashing may initially require an investment in specialized equipment, it can be a cost-effective solution in the long run. It reduces labor-intensive manual deflashing and minimizes the need for post-production rework or scrap due to damaged parts.

Overall, cryogenic deburring offers advantages in terms of precision, non-destructiveness, versatility, efficiency, environmental impact, and cost-effectiveness, making it a favorable choice for rubber deflashing processes in various industries.

Nanjing Pege Techno Machine is one of the top cryogenic deflashing machine manufacturers in the world. 

Nanjing Pege Techno Launched a New Model of Smaller Capacity Cryogenic Deflashing Machine-PG-40T

New type of cryogenic shot blasting deflashing machine has following special features:

• Extremly compact and small machine size and inner chamber to save LN2 use
• Strong power with a 3.7KW motor, and a 500mm diameter vibrator.
• High blasting efficiency and flash&media separation performance.
• Smaller location space requirement.
• Good quality performance as well as reliable processing efficiency.
• Afforable price and cheap maintenance cost.

With above good features, this type of nitrogen deflashing machine will be well accpect and welcome by rubber or plastic components manufacturers all over the world.

Pege’s Cryogenic Deflashing/Deburring Machine Features

■Visual& Intelligent HMI Panel - User friendly 11inch HMI operation panel, one stop operation mode, can record and read the parameters, easy to operate and manage。

■Robust Machine Frame - Frame is all made of 304 stainless steel, its edge uses red powder coating process to ensure both durability and elegant appearance.

■Compact Design to Save LN2 Consumption - To optimize the machine design to make sure the machine chamber is compact and small for saving liquid nitrogen to lower running cost.

■Greater Insulation Effect - Despite of using 75mm thicker insulation material, the insulation material is strengthened by SUS304 material, to ensure excellent heat preservation effect, also can lower LN2 consumption largely.

■Higher Blasting Speed with Big Diameter Wheel Ensure Great Power - Different wheel size choices ensure perfect match between power and barrel capacity to realize best processing result and highest productivity. Our 80Liter use a Ф300mm wheel with a max 7000rpm speed, and 120Liter&150liter a 350mm wheel with a max 7000rpm speed.

■Durable and Efficient Vibrator-Reliable customized SUS 304 vibrator can keep stable running for more than 10 years in the low temp, high humidity environment without failure.

■Bigger Diameter Sieve for Better Separation-Bigger capacity model(120liter&150liter’s) vibrator sieve diameters are around 600mm, which is larger than most of other manufactures, has the advantage of quicker filtering flash and media and has higher efficiency.

■Automatic Media Suction and Blasting- Automatic media circulation system by negative pressure occurred in machine inner chamber, not by screw lifter, save media and more intelligent.

■World Well-known Controller brand like SIEMENS, Panasonic or Mitsubishi, Omron to ensure high working stability in the low temp environment.
■Easy and Convenient Media Exchange system to make operation quicker and easier.

■Better Gear Box Design and use customized anti-low temp oil seal to ensure very few dusts get into the box, so less maintenance on gear box.

■More Durable Umbrella Gear and Bearings will ensure long term consistent running with less failure and less maintenance cost.

■Robust Barrel and Machine Door-use strong and thick steel for barrel and machine doors, deformation will not happen even after long time use.

 

The definition, principal, and composition of a typical Cryogenic Deflashing Machine

A cryogenic deflashing machine, also known as a cryogenic deburring system, is a type of equipment used to remove excess material or flash from molded or machined parts. Cryogenic deflashing is a process that involves the use of extremely low temperatures to freeze the parts and then removing the flash using various methods.

The cryogenic rubber deflashing machine typically consists of a large chamber or tub where the parts are placed. Liquid nitrogen  is used to rapidly cool the parts, making them brittle. Once the parts are sufficiently cooled, they are subjected to tumbling or blasting action, which causes the brittle flash to break off from the parts.

The rubber or plastic flash is then separated from the parts using air, vibration, or other means.

Cryogenic deflashing is commonly used in industries such as automotive, aerospace, electronics, and medical devices, where precision and cleanliness are critical. It is an effective and efficient method for removing flash from complex-shaped parts without damaging the component itself. Moreover, cryogenic deflashing is considered to be environmentally friendly compared to traditional methods that involve the use of harsh chemicals or mechanical trimming.

Pegedeflashing is a leading supplier of various type of cryogenic deflashing machines.

Why cryogenic deflashing machines are becoming more and more popular?

The use of cryogenic deflashing machines has revolutionized the way manufacturers produce high-quality products. Cryogenic deflashing machines use liquid nitrogen to remove excess material from manufactured parts. The process is fast and precise, making it ideal for mass production. In this article, we will explore the advantages of cryogenic deflashing machines and why they replace traditional manual deflashing methods.

 

 

 

First of all, using a cryogenic deflashing machine is environmentally friendly. This makes Operating Room safer, healthier choice for workers and the environment.

Secondly, cryogenic deflashers require less maintenance than traditional deflashing methods. This is because high quality spare part enable the machine to operate for a long time and do not require frequent replacement or maintenance.

 

Thus, these machines save the manufacturer time and business cost.

Thirdly, the cryogenic deflashing machines provide higher deflashing precision and accuracy. The process is controlled and consistent, ensuring that each pitch is finished to a high standard. This is useful for products that require smooth edges, such as medical instruments, automotive components, and electronic equipment.

 

Finally, the cryogenic deflashing machines are versatile. They are available in a wider range of materials including rubber, injection molding (including elastomeric materials) and zinc magnesium aluminum die casting. This flexibility means they can be used in a variety of industries, making them a valuable investment for many companies. All in all, the advantages of low temperature deburring machines make them an excellent choice for manufacturers. They are environmentally friendly, require less maintenance, provide greater precision, and are versatile. The cryogenic deflashing machines are becoming more and more popular in the manufacturing industry as technology advances and machine designs improve. They are likely to continue to be popular as manufacturers seek to produce high-quality products efficiently and cost-effectively.

 

 

Applications Areas of Cryogenic Deflashing Machine

Applicable Materials Of Cryogenic Deflashing

● Rubber
The cryogenic deflashing machine can process products made of neoprene, fluoro rubber, EPDM and other rubber materials. The common ones are seal rings / O-rings, auto parts, rubber parts, rubber insoles, silicone products, etc.

 

● Injection molding (including elastomer materials)
The cryogenic rubber deflashig machine can process products made of PA, PBT and PPS. The common ones are connectors, nanoforming structural parts, medical use injection parts, automotive injection parts, mobile phone cases, mouse cases, injection molding miscellaneous parts, etc.; also products made of TPU and TPE elastic material, such as watch bands, wristbands, soft sleeves, plastic cases, etc.

 

● Zinc magnesium aluminum die-casting
The pegedeflashing cryogenic deburring machine can process aluminum, zinc, magnesium alloy products. The common ones are auto parts, metal crafts, decoration items, toy parts and etc.

 

 

Consumables for cryogenic trimming machine – supply of liquid nitrogen

 

The frozen cryogenic deflashing machine, as an essential auxiliary manufacturing machinery in the production process of rubber enterprises, has been indispensable.

 

However, since its entry into the mainland market around the year 2000, local rubber enterprises have little knowledge of the working principles and processes of the frozen trimming machine.

 

Therefore, this article will provide a detailed introduction to the storage and supply methods of the cryogen, liquid nitrogen, for cryogenic deflashing machine.

 

In the past, liquid nitrogen was typically stored in separate liquid nitrogen tanks.

 

Therefore, when purchasing a cryogenic trimming machine, it was necessary to buy a matching liquid nitrogen tank to ensure the proper operation of the machine.

 

The installation of the liquid nitrogen tank required approval from the relevant authorities, which was a cumbersome process, and the tanks themselves were expensive.

 

This has led many factories that urgently need to use cryogenic deflashing machines to improve work efficiency to hesitate, as it also involves a certain upfront cost investment.

 

Nanjing Pegedeflashing has introduced a liquid nitrogen manifold supply station to substitute for liquid nitrogen tanks. T

 

his system centralizes the gas supply of individual gas points, enabling multiple low-temperature Dewar flasks to be combined for centralized gas supply. It solves the cumbersome process of handling liquid nitrogen tanks, allowing customers to operate the frozen edge trimming machine immediately after purchase.

 

The main body of the system simultaneously connects three bottles of liquid nitrogen Dewar flasks, and it also includes a port that can be expanded to accommodate four bottles.

 

The cryogenic deflashing system pressure is adjustable and equipped with a safety valve. It’s easy to assemble and can be mounted on the wall using a triangular bracket or placed on the ground using the bracket.

Cryogenic Deflashing Machine Product and Company Introduction

 

Cryogenic deflashing machines are known for its precise quality de-flashed parts with up to 95% performance output without affecting the final part dimension and shape from small O-rings to big molded parts.

These Machines serve the need for Rubber, Metal-Rubber parts, small precision plastic parts and small die-casting parts like Zinc and Magnesium alloy.

 

Product Description

Working Principle of Rubber Deflashing Machine

With the decrease of the temperature, rubber/plastic parts enter into hardened, brittle, and crystallized process, its flexibility is gradually lost. It is easily broken by external force when it is under brittle temperature. Flash of the molded products is generally much thinner than finished product itself, it become brittle earlier than product in the low temperature. Cryogenic deflashing machine applies this principle, works in the time range when flash is brittle while products still keeps its flexibility, hit the flashes by high speed projected special plastic media, clear out the brittle burr. The flashes can be easily removed, and the product not be damaged.

 

Specifications

Mode PG-40T PG-60T PG-80T PG-100T PG-120T PG-150T

Capacity 40Liter 60Liter 80Liter 100Liter 120Liter 150Liter

Wheel size 250mm 250mm 300mm 300mm 350mm 350mm

 

Worldwide Installations of Nanjing Pege Cryogenic Deburring Machine

USA, Mexico

Australia, New Zealand

Poland, Croatia, Slovenia, Hungary, Greece

Russia Malaysia, Thailand, Vietnam, India

 

FUNCTIONS of cryogenic trimming machine

Our rubber deflashing machine is widely used in removing the flashed of small rubber and plastic parts like O-rings, gaskets and other molded parts.

With the cryogenic processing technology, the flashes are firstly freeze and then shot down the high-speed projection media (Polycarbonate blast). The surface quality of molded rubber and plastic rubber parts can be improved greatly.

Product Specification / Models

 

APPLICATIONS of cryogenic deflashing machine

A. O rings, irregular rubber parts with different material and sizes.

B. Micro electronic product parts

C. Precision elastomeric parts

D. Precision injection moulding plastic parts

E. R & D part runs

F. Die casting products, like zinc aluminum, magnesium alloy

 

FEATURES of cryogenic deburring machine

High efficiency: The machine can replace about 60-80 worker to removing the flashes.

High precision: It can remove small and hardened flashes which cannot be removed by handworkers and improve precision of the products.

Low cost: It also has a feature of lower cost comparing with processing the parts by handworkers.

 

Nanjing Pege Techno Machine Co.,Ltd production plant is located in the No.9 Ankang road, Guli Industriall Zone, Jiangning District, Nanjing.

We have professional production workers and process, are determing to product best product for the customer all over the world

The cryogenic deflashing machine produced by Nanjing Pege is well packed by polywood carton suitable for long distance sea transpotation to ensure machine safety and performance.

We can help customer to arrange the transportation by the terms of FOB, CIF with land or sea transportation methods according to the resuqest from the customer.