Today, a large part of plastic production is occupied by injection molding.
As long as the hopper of the raw material is filled, the machine can make the shell of toys, laptops and mobile phones, the interior panels of the car, the lawn almost continuously.
Furniture, picnic forks, food trays for airlines, Andon and more.
For the medical market, injection molding helps reduce the cost of single productionuse items.
Most of the ingredients for entering these machines are pelletform, and the volume of each particle is about 1/3 of the mechanical pencil eraser.
At the end of last year, a company launched a machine that can form 20 parts from a single particle.
Murray is a humble entry into Sesame medical-
A large company located in IL Buffalo Grove specializing in the design and development of medical device products.
President and Founder PhilLeopold has extensive experience in the development and manufacture of equipment and automation systems for various mechanical and electrical applications in the medical and dental industries, while eson and Vice President Andy have prototyping, clinical testing, packaging and marketing of disposable and reusable medical devices in the field of concept development.
Phil also coordinates the design, installation and start-up of many automated plastic manufacturing systems and works with fiber composites, thermosolid and thermoplastic resins, metals and ceramics.
Andy once suggested that it is necessary to insert the joint in the catheter assembly using injection molding.
These components can become complex in some medical applications ---
Andydescribes describes one as from three-
Lumen squeezed out two
A section of stainless steel pipe is used for lumen extrusion inside the lens.
\"The joints may transition between soft and hard materials.
Establishing links between these departments is a \"very labor-intensive process.
\"After being rejected by several
plastic molding suppliers, he and his father decided to develop their own machines.
The product called \"sesame molding machine\" launched at 1998 medical device and manufacturing exhibition started production from 0. 05 to20 [mm. sup. 3].
To introduce this machine, they created 20 sesame-sized objects from one particle-
Test 2 capsules per grain 【mm. sup. 3]
The weight is only 0. 0022g.
The part carries the company\'s logoin 0. 3-mm-high molded-
Letters that can only be identified under a microscope.
Meet the design needs of sesame to meet two key requirements.
Before the plastic starts cooling, a small amount of plastic must be accurately delivered at a fast enough speed to fill the mold, minimizing bubbles, overheating of the plastic over a period of time, and many other potential problems.
In addition, this material takes a short stay when melting
Conveyor cylinder to prevent degradation.
Due to the small size of the Sesame machine, the injection cylinder is driven by a brushless linear servo motor.
Motor of choice, 410-
Four from Trilogy Systems.
At Webster TX, it is possible to handle a continuous force of 100 and a peak force of 450 in less than a second.
Installed on sesame, it provides a 0-for the machine-
The injection schedule is 60 minutes at 1250mm/second, and the total injection time is 0.
02 seconds with two profile speeds and two hold pressures.
This allows the filling of very thin wall parts close to 0.
Thick 025 mm with injection pressure up to 50,000 psi.
The trilogy car interior integrates a magnetic field position sensor called the aLinear Encoder Module, which Andy says has higher accuracy than the lvdts used on the first prototype, \"which makes our\" The built-
In the LEM, there is no alignment and packaging problem with conventional linear encoders, and the optical encoder will experience greater risk of failure due to heat and sand in the injection molding environment.
In general, the trilogy package combines motor, encoder and position switches, plates, rails and bearing blocks, and even mounted rails and mounting hardware into a single bolt-in assembly.
Even if the screw diameter is 12 mmin, there will be a material degradation problem.
This is because, for the lens size of the micro-shape, it can be kept in the barrel for a few hours, about 1000 or so shots.
To solve this problem, Sesame uses a pneumatic vertical piston coupled with a linear servo motor
Drive the injection needle. A high-
Pressure valves are located between them.
The particle feeder is driven by a special stepping motor, and the material distribution on sesame is automated.
If necessary, the system is designed to provide only one pelletper per reload cycle.
When combined with the reload control of the plasticized piston, the dwell time can accurately match the part and the material being formed.
Servo controls and sorters that oversee all of these systems are products from CA Chatsworth Delta Tau, control panels from Cincinnati Exor, providing a familiar PC-based GUI.
The clamping unit is driven by double self
Align the Festo pneumatic cylinder with the force and speed control, apply a standard clamping force of 600 and choose to clamp up to 4000-lb.
Festo also helped design dummy blocks controlled by the system computer.
\"We are looking for reliability and metrics components,\" said Andy . \".
\"Festo meets our needs and provides excellent service.
He added that the Delta Tau computer was selected because it was able to handle the speed involved in the injection process and the ability to handle sequential tasks.
The use of linear guide rails for Clamp, Schaumburg, IL helps to align the clamping movement and the injection unit.
Pneumatic can also handle parts pop-up, vertical clamping is an option.
The construction of sesame focuses on its use in clean rooms-
The structure is made of stainless steel and anodized aluminum, the system does not use hydraulic or lubricant, the parts such as trilogy motor are clean room-rated.
The whole unit takes up 24 spaces. x 54-
In, the height is 64 in.
, And the operating requirements of Sesame 115 VAC and shop air 90 psi make it possible for Sesame abenchtop plastic store.
According to Andy, the speed and efficiency of sesame machinery makes it useful in applications other than duct parts.
There is no new bioabsorbent material on the market that can work with themachine to create implanted carriers for drugs-
After injection, the carrier is decomposed and discharged from the body.
In addition to medical products, sesame seeds can produce parts with holes as small as 1.
5 A few points low
Pressure holes, as well as components such as miniature rails and sliders for disk drives and switches.
Medical Murray has passed on the manufacture and sale of sesame machines to Hull, PA Warminster, USA.
But this is not the end of Murray\'s involvement. -
Not only do they deal with Machine improvements and upgrades, but they also use sesame as the main business tool for medical equipment development. Circle 202--
Medical Murray, or connect directly to their website via the online reader service program on www. rsleads. com/210df-202 Circle 203--
Or connect directly to their website. rsleads. com/210df-203 Circle 204--
Festo, or connect directly to their website atwww. rsleads. com/210df-204 Circle 205--
Or connect directly to their website atwww. rsleads. com/210df-205 Circle 206--
Or connect directly to their website. rsleads. com/210df-206 Circle 207--
Hull made or connected directly to their websitersleads. com/210df-
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