Comco Inc. //www.zumbaforlife.com 微喷砂技术的领先制造商 Tue, 30 Mar 2021 15:04:32 +0000 en - us 每小时 1 https://wordpress.org/?v=5.7 油污染:您需要采取的预防措施 //www.zumbaforlife.com/oil-contamination-the-preventative-measures-you-need-to-take/ Comco销售和支持 2021年3月15日星期一20:36:28+0000 Comco更新 accuflo 康可 BOB体育平台怎么样 bob外围2021欧洲杯外围 设备 操作 维修 故障排除 //www.zumbaforlife.com/?p=231606 < p > < a href = " //www.zumbaforlife.com/oil-contamination-the-preventative-measures-you-need-to-take/ " >继续阅读<跨类=“meta-nav”> & # 8594;< / span > < / > < / p > < p >的<一个rel =“nofollow”href = " //www.zumbaforlife.com/oil-contamination-the-preventative-measures-you-need-to-take/ " >石油污染:您需要采取的预防措施首先出现在Comco Inc.

One of the major differences between micro-abrasive blasting and other types of sandblasting is the precision of the process. This is partly achieved by using very fine, tightly-classified abrasives. A clean, dry air supply must be provided to allow abrasive media to flow without interruption. If the air line becomes contaminated with moisture or oil, the effectiveness of the process will be severely limited. Even tiny amounts of oil contamination can cause major failures in the MicroBlasterʼs internal mechanisms.
Proper protection from oil is especially critical for micro-abrasive blasters that are connected to a shopʼs compressed air line. Often oil is added to air lines for pneumatic instrument lubrication, but this is damaging to a blaster. Older piston compressors tend to have leaky O-rings, putting oil into the air stream.

How to Identify Oil Contamination

If you suspect that your MicroBlaster is contaminated with oil, there are a few signs you can look for to confirm this.

1. Watch the Air Line Color

The air lines that run clean air through a Comco MicroBlaster are a milky-white color when new. Exposure to oil causes these air lines to turn orange or yellow color. Take a look at the air lines compared to the right.

Oil, moisture contamination in Comco MicroBlaster. Clean dry air prevents this damage.
Oil Contamination in regulator of Comco MicroBlaster

2. Check for Oil Pools

Oil has a tendency to pool in the regulator assembly of a Comco micro-abrasive blaster. Unscrew the black plastic bonnet to see traces of oil inside the regulator. Use the images below to compare against your own blaster interior. (Note: This can be a difficult area to access.)

3. Look for Clumps

When oil contamination becomes severe, abrasive media adheres to the filter element. If you suspect severe oil contamination, open the assembly to expose the filter element and look for large clumps of abrasive. The image to the left show abrasive clumping due to oil contamination.

Abrasive plating due to oil contamination in Comco MicroBlaster.
Abrasive clumping due to oil contamination in Comco MicroBlaster.

What Damage Can Oil Do?

Initially, oil contamination in your micro-abrasive blaster causes irregularities in the abrasive flow. Abrasive clumps form above the abrasive tank orifice, limiting the amount of abrasive that can pass out to the abrasive hose and the nozzle. Sometime abrasive clumps pass through, only to form obstructions at the nozzle. These clumps can be identified by a mass of small particles that tend to break apart under force. The major impact of oil contamination is check-valve failure. Oil contamination usually prevents the check-valve from sealing properly. When the check-valve fails to seal, air and abrasive particles pass back through the check-valve into the ‘clean’ side of the blaster’s system. Backward moving abrasive is detrimental to the proper operation of the valves and cylinders in this part of a blaster’s system. Abrasive is too aggressive and quickly erodes the O-rings and seals on these components. This type of damage to a blaster is quite costly to repair.

How to Avoid Oil Contamination

While oil contamination can cause a major disaster inside your blaster, it is one of the easiest problems to avoid. The compressed air line running to a Comco MicroBlaster should pass through an oil filter and air dryer just before it reaches the unit. Not only does the oil filter protect the blaster components, but it also keeps oil from coating the desiccant or membrane filter inside the air dryer, prolonging its useful life.

Dig Deeper

Power up and down correctly to prevent abrasive contamination.

5 Ways to Break Your Blaster

Learn what happens when you blast without a nozzle or turn the abrasive blend knob too far. Read this and avoid a blaster disaster. Continue reading 
Clean your blaster after using sodium bicarbonate.

The Importance of a Clean, Dry Air Supply in MicroBlasting

Even a minuscule amount of moisture contamination can cause abrasive to “clump up” and prevent it from flowing freely from the tank—bringing your entire operation to an abrupt halt. Continue reading →
Valve manifold assembly in Comco AccuFlo infected by abrasive contamination.

Prevent Abrasive Contamination

Learn what happens when you blast without a nozzle or turn the abrasive blend knob too far. Read this and avoid a blaster disaster. Continue reading 
Clean your blaster after using sodium bicarbonate.

Cleaning Guide for Sodium Bicarbonate Users

Learn how to check for plating and keep your equipment clean. Continue reading →
Rob in Tech Support

Questions about Blaster Maintenance?

Do you have any more questions about blaster maintenance? Email me or give me a call at 818-841-5500.

The post Oil Contamination: The preventative measures you need to take appeared first on Comco Inc.

JetCenter的新手柄腕部改进了批处理 //www.zumbaforlife.com/grip-wrist-for-jetcenter/ Comco销售和支持 Wed, 03 Feb 2021 21:12:34 +0000 自动化 Comco更新 装备 JetCenter 自动小成红血细胞 自动化系统 爆炸头 康可 BOB体育平台怎么样 bob外围2021欧洲杯外围 设计 发展 设备 植入物 jetcenter 医疗 医药制造业 医疗部分 医疗产品 微磨料喷砂 微磨料喷砂系统 微型精密喷砂 小成红血细胞自动化 喷嘴夹具 精确喷砂 研发 支架 表面光洁度 表面结构 纹理 纹理 //www.zumbaforlife.com/?p=24244

The Grip Wrist is the latest blast head designed for automated MicroBlasting systems. Unlike prior blast heads, it moves the part to the nozzle. See it in action and learn more. Continue reading

The post New Grip Wrist for JetCenter Improves Batch Processing appeared first on Comco Inc.

The Grip Wrist (pictured above) is the latest blast head created for our JetCenter Automated MicroBlasting System. You may have seen other blast head options including the Spin Wrist and the Twist Wrist. While each performs distinctively, all move the nozzle to and around the targeted part.

The Grip Wrist is different: it brings the part to the nozzle.

The Twist Wrist moves the nozzle around the part.

The twist wrist is available for applications that need to move the nozzle around the part.


The Grip Wrist in Action

Take a look at this quick video to better understand its capabilities. 


Interview with an Expert

In the interview below, we dig into the design and capabilities of this new blast-head with Chief Engineer, Mickey Reilly.

What motivated the creation of the Grip Wrist?

[Reilley]  The JetCenter, our latest automated system, features a very large travel envelope because it was initially designed to process 300 mm silicon wafers. Once we had that space, we wondered what else we could do with it. We thought, “what if we use that travel and space to load in a tray of parts, and then pluck each individual part and move it to the nozzle for blasting?” So we developed the Grip Wrist.

What previous Comco designs contributed to its development?

[Reilley] The Grip Wrist is a modification of our Gripper Spindle, which is a modification of our Vacuum Spindle. It has been a constant evolution for 15 years. 

Chief Engineer, Mickey Reilley, discusses the Grip Wrist

Chief Engineer, Mickey Reilley

Comco Beveler with early generation of vacuum spindle

Beveler with Vacuum Spindle, 1970s

Comco Vacuum Spindle in Lathe

Vacuum Spindle in Lathe

Gripper Spindle in Advanced Lathe

Gripper Spindle in Advanced Lathe

Comco Grip Wrist in JetCenter

Grip Wrist in JetCenter

The 1st generation Vacuum Spindle was developed from the 1970s “spindle station” machine that looked like a record player. It’s so old that we don’t even have CAD models. This spindle had small bearings and a plastic o-ring rotary vacuum union. This design was used in our original Standard Lathe. 

Significant design changes were made between the 1st and 6th generations, but the primary change to note is that the Gripper Spindle required a better seal to transfer air pressure to the spinning shaft. The original seals were only being used at vacuum (-14 psi), but the Gripper Spindle required high pressure (100 psi). So, the original seals weren’t going to cut it.

The new seals are a special Teflon material and ride against a hardened/ground/polished steel shaft. There are two sealing lips on each seal for better sealing and longer life. And these seals are capable of 100 psi. This spindle has new bearings, a new housing, new motor, new everything. We liked this new seal so much that we now use it on all of our spindles. 

The Grip Wrist uses a custom-made PTFE double-lip seal against a hardened ground shaft. I tested the new seal to 100 million revolutions, and it still performed better than the old-style seal.

How did you meet the challenges of the abrasive environment?

[Reilley] The Grip Wrist sits out of the way and above the blast stream. It operates in a downflow environment. It is completely sealed, including the spinning gripper. Even if powder manages to get past the seals, the internal components are also sealed. This approach to protection has proven its reliability in the field.

What applications might benefit from the Grip Wrist?

[Reilley] The Grip Wrist suits many applications we traditionally do in our lathes, but it enables batch processing. Spinal implants, dental implants, and bone screws are the most obvious candidates, but the possibilities are great. 

Ideal for processing bone screws, stents, dental implants, etc.

The Grip Wrist is ideal for processing bone screws, dental implants, and more. 


Dig Deeper


 

Colin Weightman, Director of Technology

Questions about automating your process?

Email me or give me a call at 800-796-6626.

The post New Grip Wrist for JetCenter Improves Batch Processing appeared first on Comco Inc.

年度保养提醒! //www.zumbaforlife.com/annual-maintenance-2/ Comco销售和支持 2020年12月9日星期三22:59:48+0000 Comco更新 磨料 磨料软管 accuflo 年度维护 康可 BOB体育平台怎么样 bob外围2021欧洲杯外围 消费品 操作 维修 微磨料导火线 微磨料爆破喷嘴 微磨料喷砂系统 微滤板 调制器 粉末垫垫圈 门输出拟合 粉末闸阀 powerflo procenter + 替换配件 调整套件 穿 磨损 挡风玻璃 //www.zumbaforlife.com/?p=231149 年末了,这意味着是时候进行年度维护了。学习如何检查关键部件的磨损。准备一份爆破用品清单等等。继续阅读

then on Comco Inc

The end of the year is a great mile-marker for annual maintenance. An ounce of prevention sure beats several pounds of equipment needing to be shipped to Comco for a major repair. Check out the maintenance tips below to make sure your system is in excellent shape for the new year.

1. Stock-up before winter shutdowns

Our offices will close from December 24th, 2020 to January 3rd, 2021. We will re-open on January 4th, 2021. However, the last day to place orders for consumables will be Friday, December 18th. Orders placed after that date will be filled in the new year.

Comco Winter Shutdown Calendar 2019
To prepare for any winter shutdowns, double-check your supplies. That includes nozzles, abrasive, abrasive hose, window shields and tune-up kits. Winter weather and holiday closings can bring blasting to a standstill if you are caught unprepared. Prevent production interruption by making sure your team has what they need to get through the next few months.
Check blasting supplies during annual maintenance.

Abrasive

You can’t blast without abrasive. Get part numbers here.

Small rupture on abrasive hose; abrasive hose worn through.

Abrasive Hose

Don’t just cut off worn sections. Learn why.

Window Shields

Replace when frosted and peeling. Get part numbers here.

Tune-up Kits

Perform DIY maintenance with a tune-up kit.

Nozzles

Replace at 10-15% growth. Get nozzle part numbers here.


2. Check the PowderGate Nosepiece

The nosepiece regularly opens and closes to allow and block the flow of air and abrasive during a blast cycle. As with anything that abrasive touches, the nosepiece can wear over time. A channel or groove can form on the side of the nosepiece as air and abrasive flow around it. If the channel becomes wide and deep enough, the nosepiece will not form a seal with the output fitting when the PowderGate closes. Air and abrasive will continue to find a passage, and the constant low-level seep will eventually erode the output fitting, too.

PowderGate parts diagram

Soft abrasives tend to take a long time to wear down the nosepiece, but aggressive abrasives like aluminum oxide and silicon carbide tend to erode the nosepiece quickly, especially in applications that require high blast pressures or large nozzles.
Cutaway of the PowderGate nosepiece (light blue) in the open position. Air and abrasive can now flow around the edge of the nosepiece and out through the exit (red arrows).
The nosepiece in the closed position. The nosepiece forms a seal with the output fitting, closing off air and abrasive flow to the hose.

How to Check It and Replace It

Make sure your Comco blaster is ON but not blasting (footswitch is not pressed). Put your finger over the opening of the nozzle for a few seconds, then release it. If you feel or hear a burst of air exit the nozzle, that indicates a leaky nosepiece. Replace it immediately. The nosepiece is easily accessible from the side of the AccuFlo® without having to remove the cover of the unit. Contact Technical Support at techsupport@comcoinc.com or 1-800-796-6626 if you have any questions about wear and replacement.

The Comco part number for the PowderGate Nosepiece is MB1653.


3. Check the Modulator

The modulator is the heart of any Comco blasting system, so regular replacement protects your overall investment. Here are 3 ways to identify a worn modulator.

Watch for Low Flow

When a modulator is too worn to seal properly, the abrasive stream starts off strong but drops off to almost nothing within 3-5 seconds.

Listen for a Rattle (MicroBlaster® only)

In the MicroBlaster, a good modulator hums, and a worn modulator rattles.

Track Blast Hours

This is the most accurate way to manage modulator maintenance. The AccuFlo modulator has a lifespan of 5,000 blast hours; whereas, the modulator on the MicroBlaster, Powerflo® and DirectFlo™ last about 2,000 blast hours.

Learn more about modulator wear and repair on Comco blasters.

Understanding Modulator Wear and Repair

If you have a classic MicroBlaster, learn how to spot wear and replace this component. Continue reading →
NOTE: The AccuFlo features a re-designed modulator that works better and lasts longer. Learn why.

The Comco part numbers for each modulator:

  • AccuFlo: MB2250-1 (115V) and MB2250-2 (230V)
  • MicroBlaster: MB1301-2*
  • PowerFlo/DirectFlo: PF2040*

*Housing assembly only; reuses the coil from existing modulator


4. Check the HEPA filter

HEPA filtration removes 99.97% of particles from the work chamber in the ProCenter Plus™ workstation. When the mallets can no longer knock spent abrasive from the filter surface, then the HEPA filter is full and needs to be replaced. HEPA filters tend to reach capacity after 6-9 months of regular use.

Learn more about maintaining a ProCenter Plus.

ProCenter Upkeep in 5 Steps

Follow these 5 steps to protect your ProCenter workstation. Continue reading →

Replace every 3 months if…

If your blasting system runs all day and/or processes a high volume of parts, then replace the HEPA filter after 3 months of use. If you are blasting with abrasive that is smaller than 25-microns in size or if you are blasting with sodium bicarbonate, then you should also replace the filter after 3 months of use. Sodium bicarbonate breaks down into dust after blasting, and those extremely fine particles embed deep into filter pores.

The Comco part number for the HEPA Filter is CTR280-1.


5. Check out the Replacement Parts page

Consult your manual to do a full inspection of your Comco equipment. If you notice wear on components that are not mentioned above and need to replace them, use the new Replacement Parts page to see exploded diagrams and access part numbers and descriptions. Don’t forget to consult the FAQs on the bob sports if you have additional questions, and of course, we are always here to help!

Notice Moisture or Oil?

If you notice moisture or oil contamination inside your blaster, read this. You will need to send your machine in for repair. To obtain an RMA#, contact Technical Support at techsupport@comcoinc.com or 1-800-796-6626.

Replacement Parts

See equipment diagrams and get part numbers for the standard models in our line of MicroBlasting equipment. Continue to page →

Dig Deeper

Power up and down correctly to prevent abrasive contamination.

5 Ways to Break Your Blaster

Learn what happens when you blast without a nozzle or turn the abrasive blend knob too far. Read this and avoid a blaster disaster. Continue reading 
chunky sodium bicarbonate abrasive in an Accuflo Tank

The Importance of a Clean, Dry Air Supply in MicroBlasting

Due to the very small size of the abrasive particles used for MicroBlasting, even a minuscule amount of moisture contamination can cause abrasive to “clump up” and prevent it from flowing freely from the tank—bringing your entire operation to an abrupt halt. Continue reading →
Learn more - changing the tank orifice

Fight the Urge to Pedal Pump

Pedal pumping, or pumping the footswitch, damages key blaster components, wastes abrasive and leads to uneven results. Continue reading 
Fresh vs. spent sodium bicarbonate particles

Before Recycling Abrasive: Read This.

Spent abrasive may look like the fresh stuff, but it produces poor results and damages your system. Continue reading →

Rob B., Technical Support

Questions about maintenance?

Email me or give me a call at 800-796-6626.

The post Annual Maintenance Reminder! appeared first on Comco Inc.

磨料射流加工的5个重要变量 //www.zumbaforlife.com/5-cutting-and-etching-variables/ Comco销售和支持 2020年11月17日星期二23:19:08+0000 Comco更新 过程基本原理 自动小成红血细胞 bob外围2021欧洲杯外围 控制水土流失 过程基础 //www.zumbaforlife.com/?p=230034 < p > < a href = " //www.zumbaforlife.com/5-cutting-and-etching-variables/ " >继续阅读<跨类=“meta-nav”> & # 8594;< / span > < / > < / p > < p >的<一个rel =“nofollow”href = " //www.zumbaforlife.com/5-cutting-and-etching-variables/ " > 5磨料喷射加工的重要变量< / >第一次出现在< rel =“nofollow”href = " //www.zumbaforlife.com " > Comco Inc . < / >。< / p >

Using MicroBlasting to cut or etch a part (a process also known as controlled erosion) is a great method to machine many precision parts, from drilling holes in ceramic substrates to cutting slots in fragile silicon and glass wafers.  MicroBlasting is “shockless,” generating neither heat nor vibration, meaning microcracks are less likely to form and damage part integrity.  How can one process work for such a wide range of applications? Carefully controlling a few key factors.

1. Know the material you’re cutting or etching

Both brittle and ductile materials can be cut and etched with MicroBlasting – they just use different strategies.

BRITTLE MATERIAL

MicroBlasting is an excellent choice when cutting and etching brittle material because it’s a quick process. Nearly all of the deposited abrasive energy goes into breaking the material bonds holding the surface together.

DUCTILE MATERIAL

MicroBlasting works well with ductile materials too, though the process can be slower than brittle parts with similar hardness. The resulting finish on a ductile material is rougher than on a brittle material because the impact of the abrasive causes the edges of each surface crater to smoosh upward.

2. Measurements are key

MicroBlasting is so controllable, you can etch features with varying depths and sharp walls – but maintaining accurate measurements are crucial to achieving these results. There are a few ways to make these measurements:

Weight loss

Measuring via weight loss can be done in one of two ways. The first method is to weigh the part to determine how much material has been eroded. This method is great if the part is small and will not use much abrasive. The second is to weigh the blaster to measure how much abrasive has been spent. This method is better if a lot of abrasive will be used. Hydrodynamic seals are processed in this manner. 

Timed Blasts

You can figure out the amount of time it takes to etch a specific material to your specifications pretty easily. First, experiment with different blast durations and measure the resultant depths. Then continue to experiment until you find the required duration. Just remember to keep your abrasive type, velocity, and quantity consistent, as these factors can also affect the depth of your cut (we’ll talk more about these later on). This method works best for very consistent parts, like wafers and surfaces for microfluidics. 

Other Methods

Using separate measurement tools works especially well for depth control when creating pockets or trenches in a part. Some examples of processes we have used are listed below:

  MICROMETER STYLUS PROFILOMETER LASER TRIANGULATION MICROSCOPE AND INTERFEROMETER
Tools We Use Mitutoyo

Mitutoyo SJ-201 with Surfpak-SJ software

(2um tip radius with 0.75 mN downforce)

Keyence LK-H008W sensor and LK-G5001 controller

(20um x 550um beam spot size)

Keyence VK-9700 and Zygo NewView 7000 series

(5x and 50x lens)

Resolution   10 nm 5 nm .1 nm
Real-World Depth Measurement 1000 nm 1000 nm 100 nm 1000 nm
Price $200

$2500 for profilometer

$2500 for software

$7000 for sensor

$3000 for controller

Typical system cost aprox. $100,000

 

3. Create a Steady Stream

As mentioned above, three abrasive factors determine how a material erodes when blasted. Finding the best combinations for your application (and keeping them consistent) is critical to repeatable results.

 

Abrasive Velocity.

Typical particle velocities during controlled erosion applications are 150-225 m/s (492-739 ft/s), based on air pressure, nozzle geometry, and blast distance from the nozzle to the part. Velocity is controlled by the nozzle size, blast pressure, and distance from the nozzle to target. The simplest way to speed up your process is to dial up the pressure, but that could result in less precise depth control, leading to unevenness in the final surface. Worse, if you are using a mask, you could potentially destroy it before the process is complete.

 

Abrasive Quantity

Most applications benefit from the combination of a rich abrasive stream and fast nozzle speed with multiple passes

MicroBlasting usually takes 20-60 seconds per square inch of material blasted per pass. Most applications benefit from running the nozzle as fast as possible. Doing so prevents damage to masking material and provides better depth control per pass. Cutting deep channels or holes benefits from a leaner abrasive stream. Too much spent abrasive in the hole prevents new cutting action. When cutting or etching a part, less is more!

Abrasive Type

One of the most common abrasives used in cutting and etching applications is aluminum oxide. Being only slightly softer than diamond it cuts effectively for both brittle and ductile substrates. For very soft materials, like polymers, sodium bicarbonate is a better choice. It is able to transfer more cutting energy into the substrate.

The size of the particles is also important. The advantage of using a larger abrasive is an increase in material removal rates. The disadvantage is that it provides less depth control, increased surface roughness, and a less distinct transition at the edge of the blasted area.

The most common abrasive we use for etching ceramic wafers is 17.5 micron aluminum oxide. The finished RA is 0.15-0.3µ (or 5.9-11.8µin).

4. Is Masking Required?

Most cutting and etching applications use a mask, but sometimes a part can be directly machined. Knowing when you need to use a mask and when you can go without one is crucial. 

DIRECT MACHINED

Direct machining is best when removing large, simple sections of material. A small nozzle and accurate parts-handling capabilities work together to cut a pattern into the substrate. The focused abrasive stream prevents overspray, eliminating the need for a mask, and reducing abrasive consumption.

MASKED

Masked machining works well with applications that have many small features. To cut or etch a part using a mask, use a metal or polymer photo-resist material to expose only the areas that require blasting. Then, sweep the nozzle back and forth over the entire mask to erode fine layers of the exposed surface.

5. Keep in Control

Consistent results require consistent blasting processes. While manual systems work fine for applications with low volume or less rigid tolerances, automated systems perform the vast majority of cutting and etching applications. For example, to create end effectors in semiconductor parts, small dots are masked while the rest is eroded away, leaving pillars. Creating features this precise are only possible through automation. By automating the parts-handling component of the blasting system, tight tolerances can be achieved—in some applications, as tight as 0.5µ.

Whether you are using an automated or manual system, the most important way to achieve repeatable results is by keeping all your variables constant. We look forward to helping you determine the best MicroBlasting system for your application!