C. A. Lawton Co.

Contact: Daniel Buckley

1232 Russellville Rd.
Shrewsbury, Vermont 05738
U.S.

Phone: 802 492 3599
Fax: 802 492 3597

Website

E-mail

We are a machinery builder that specializes in custom and standard compression presses. We provide medical molding machinery, micromolding machinery and nanomolding machinery. We also provide Long Fiber Thermoplastic plasticators and LFT compounding machinery.

bout Us
Why choose The C.A. Lawton Co. to manufacture sophisticated molding equipment for your company?
At Lawton, we don't just build presses. We don't just design systems. We provide complete, start-to-finish and "every detail in between" solutions that help optimize your core processes.
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Why choose Lawton?
We're not just an industry leader. We set the pace, with automation technology so advanced, it doesn't just redefine "state-of-the-art," it helps redefine your bottom line.
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We'll help you take performance and profit to a new level.

* Lawton's systems feature:
* State-of-the-art control packages.
* Process automation
* Customized insert molding systems.


We are committed to developing and installing highly specialized solutions for molding:

* Circuit breakers
* Coils
* Electrical enclosures
* Fiber optic connectors
* Integrated circuits
* Relays
* Sensors
* Switches
* Catheters
* Lancets
* Lumens
* Syringes
* Scissors
* Seals

History
The C.A. Lawton Co. has partnered with industrial companies worldwide to design and build presses, patterns, castings and gears for virtually every commercial application.

Since 1879, The C.A. Lawton Co. has been meeting the changing needs of the business and industrial communities. Under four generations of family leadership, Lawton has grown from offering pattern making and foundry products to providing all facets of production services, including:

* Engineering
* Foundry Work
* Pattern Making
* Machining and Tooling
* Breakdown Services


In 1935, Lawton expanded its services to include a plastic machinery division. Today, The C.A. Lawton Co. can provide total solutions for your company. From in-plant inspections through applications, engineering, pattern making and casting . . . to design/build of standard and customized plastics machinery.

Manufacturers of the Medi-Molder and Sesame Nano-Molder plastic injection molding machines designed specifically to meet the needs of medical device manufacturers. Lawton excels at taking difficult insert molded medical devices from prototype stages to consistent production volumes. Our molding processes can replace ultrasonic welding, dipping, pouring, potting, heat staking, and solvent bonding.

The growing list of typical devices include: Needles, Catheters, Stylets, Trocar Handles, Scalpels, Patient Electrodes, Filters, Pacemakers, Fetal Monitoring Probes, EKG leads, Y connectors, Power Cords.

Typical molding materials are:
* Biodegradable polymers
* Polypropylene
* Polyethylene
* ABS
* LCP
* Nylon
* Pebax
* Tecoflex

* PET
* Silicone Rubber
(20A to 80A)
* Acrylic (PMMA)
* Polycarbonate
* TPE-s
* Glass filled materials
* Polyurethane


Lawton Machinery has applied more than 65 years of building molding equipment to design an injection, insert molding machine specifically for the efficient production of quality medical devices.

Experience the advantage of working efficiently with a single source from product conception to volume production. Coupled with our state of the art controls and robust time proven designs you will reduce product development time.

The Lawton Nano-Molder is an injection nanomolding machine specifically designed to produce volumes of miniature molded medical parts for the medical industry.

The Lawton Nano-Molder can produce parts 100 times smaller than previously possible. The Lawton Nano-Molder does this by effectively producing the smallest shot sizes in the world without the typical shortcomings of other machines.

PART SIZE: Typical part sizes range from .0001 to .35cm3 with shot sizes from .01 cc to .75 cc. Part weights as small as .0001 grams. Wall thickness of .001". Parts as small as a sesame seed.

ADVANTAGES: Following are a few of the concepts that make the Lawton Nano-Molder stand out.


* Linear Servo Injection Control
* Low mass for quick response
* Position accuracy within 5 microns
* Fill time as low as .01 seconds for thin walls
* High-Speed Digital Motion Control
* Fast response time
* Color touchscreen
* Data collection capability
* Integrated Nozzle Shut-Off
* Standard machine feature
* Precise shot volume
* Virtually eliminates drool
* Modular Feeding System
* Easily Converts from Thermoplastic to LSR
* Miniature LSR dual cartridge feeder.
* Cleanroom Compatible

Typical Materials: Silicone Rubber (LSR), Pebax, Nylon, Tecoflex, Polyurethane, LCP, Polysulfone, PEEK PET, Bioabsorbables

Complete Lineup
Lawton offers a complete line of molding machines designed to meet the most stringent quality control and production requirement. Our line of vertical clamp injection molding machines ranges from 10 to 1,000 tons of clamp force, and is specifically designed for insert molding applications. This process can cut end part costs by eliminating assembly operations and increasing productivity. Lawton offers these and other features:

* Barrel and screw to meet specific material needs.
* Graphical user interface with touch screen.
* LDC operator interface for entering process parameters and monitoring alarms.
* Pneumatic ejection station.
* Programmable rotary table.
* Shuttle system.
* Stationary platen configuration


Control Systems
Final part quality and the economics of process are greatly influenced by process control. Control systems not only provide consistency and repeatability in machine operation, they monitor and control processing parameters. Lawton can develop a control system ranging from a simple relay on/off control to a sophisticated microprocessor-based, closed loop control.

Lawton also has extensive in-house experience in designing and bundling components into one integrated solution, including:

* Clamp position sensor.
* Computer controls with process control.
* Motion controllers.
* Networking.
* PC-based process control.
* PID temperature controls.
* Position and pressure sensors - closed loop controls.
* Proportional speed and pressure controls.
* Robotics.
* Servo control speed and pressure.
* Touch screens.
* Variable shot size, injection pressure and speed control from station to station.


Control Software
Standard control software packages provide standard results. With an internal staff of programmers, Lawton can write a customized program for your specific molding process. Modifications can also be made in-house, providing your company with complete, efficient follow-through.

Fault Correction Systems
Downtime. It can mean the difference between profit and loss . . . within a matter of hours, or in some cases, minutes. To help meet industry‰s needs for optimal machine performance, Lawton has developed highly-advanced fault correction systems. These systems not only determine when a problem occurs, they can identify a specific problem and covey notice to an operator. This allows for precise and immediate troubleshooting, reducing costly downtime.

Your Company Benefits
It‰s a fact: Lawton has grown to become an internationally-known name for quality and performance. Performance that shows up on your bottom line, with benefits like:

* Reduced cycle time and labor costs.
* Improved quality and reduced waste. Greater consistency can lower your "per unit" cost.
* The ability to respond to a broader customer base. In addition to high volume application, Lawton can design machines that can handle short-run, higher product mix lines for targeting multiple customer applications.
* Cost effective solutions. Lawton has built partnerships based on trust. If your company can benefit from leading edge technology and automation, Lawton will provide the solutions. In the same respect, we‰ll let you know if other options will be just as effective in meeting your goals.

Plasticating Unit
The C.A. Lawton Co. designs and builds innovative molding machinery for the preparation of reinforces plastic materials. The plasticating unit is designed to prepare a wide range of different plastic materials.

Material adapted screws allow the following materials to be reliably plasticated and dosed for further downstream processing:

* Long fiber reinforced plastics
* Shredded old material
* Mixed recycled plastics
* Additives, glass and neat resins


These plasticating units and their peripheral material supply, dosing, and handling systems, offer the user a wide choice of possibilities for production process optimization and the introduction of new technical application methods.

The plasticating unit's versatility is increased by its design as a mobile unit

Plasticating and volume dosing are discontinuous. The temperature required for the process is induced externally via high-rated ceramic heating bands, and in some cases, internally through a heated screw. A wide range of the screw rotational speed, temperatures, dynamic pressure, injection speed, etc. can be adapted to the material specific requirement. These parameters are part of the PLC control system.

During the plasticating process, the reciprocating screws convey the melt to the front of the barrel. As soon as the desired dosing volume is reached, the:

* Plasticating process is interrupted
* Cut-off knife opens
* The screw pushes the dosed melt out.
* Cut-off knife closes


When discharged in this manner, the contour of the metal can be determined by means of permanently installed orifice plates or by automatically adjustable flat sheet. At the end of each cycle, the extruded product is cut off from the material remaining in the cylinder by means of a hydraulically operated cut-off knife.

A temperature resistant, speed controlled discharge conveyor with high speed / creep speed controls is used to transport the extruded product into position for further handling. Form and material consistency of the plastics volume, together with the optimization of technical application parameters, are important for a reliable process. The plastic volume can be influenced by the automatically adjustable flat sheet or slot die, which offers the possibility to vary width and thickness of the plasticated material during deposition. When the dimensions of the plasticated product can remain unchanged, permanent orifice plates can be installed. All technical application parameters can be changed at the operator interface.

The C.A. Lawton Co. Plastic Machinery Division was established in 1935 to meet the molding industry's demands for dependable, efficient presses. Since then, Lawton has become a leader in design and building of molding machinery for companies worldwide. Today, we are applying this experience to provide innovative long fiber technology to companies throughout the world. We are at your service as the specialist for designing and building plasticating machines for careful processing of long fiber reinforced plastics using plasticated pressing and plasticating deposition pressing processes. Lawton can design and build fully automated systems. These systems are capable of automatically loading the material to the plasticator, loading the material from the plasticator into the mold, automatically unloading the molded part, and performing any post molding operations. We also have very experienced technicians available to offer processing assistance. Whatever your molding needs, Lawton can provide your company with innovative, cost-effective solutions to meet your objectives.