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Machine Device Plastic Joining

Machine Device Corporation’s vast experience with various forms of plastics joining enables us to employ optimal processes for your program needs in:

  • Thermal Welding
  • Spin Welding
  • Ultrasonic Welding
  • RF Welding
  • Hot Plate Welding
  • Adhesive Bonding
  • Automated Welding & Bonding

Thermal Assembly Systems

Machine Device’s thermal assembly systems make use of direct contact-heated tools and precisely controlled time, temperature, pressure and cooling, to reform plastic studs, walls, and protrusions, or to embed metal components into plastic. This offers the ability to perform multiple operations on several planes simultaneously. Cycle times are relatively fast, and productivity can be increased through the assembly of multiple products. Cosmetics are so exceptional that heat staking appears to be an extension of the molding process. Heat Systems with interchangeable process tooling for: Staking, Insertion, Embossing, Hot knife degating, Date coding, Filter media, Membrane sealing and Tamper evident packaging.

  • Arbor Style Lab Presses
  • Bench Top Pneumatic Systems
  • Automation Actuator Heads, Modular Power Supplies, and Rotary Systems
  • High Tonnage Multilevel and Multi-point Systems
  • Closed Loop Process Controls: Multi-point Temperature zones, Multilevel Distance control, Dual Pressure Force control, Multi-point and Independent Temperature Zones, Microprocessor and Standard Time models available

Spin Welders & Welding

Spin welding is used to join two plastic parts which are spherical or cylindrical in shape. Frictional heat is generated at the mating surface by spinning one part (upper) against a fixtured (lower) part, thus welding the assembly together. Spin welding is a fast process that works well with large and small diameter parts as well as a broad range of thermoplastic resins.

  • Touch Panel Controls
  • Multistage Speed Control
  • Multiple Program Storage
  • Linear Distance Control
  • Multistage Pressure Control
  • Angular Control Option for Final Part Orientation
  • Dual Servo Control

Ultrasonic Welders

An ultrasonic welding machine is used to join small and medium sized thermoplastic parts through pressure and high frequency mechanical vibrations (15 kHz- 40 kHz), creating localized frictional heat that melts the plastic together. When the vibrations stop, the plastic quickly cools and solidifies. Ultrasonic welding is quick, repeatable and does not require consumables. Hermetic seals can easily be obtained with ultrasonic welders. Machine Device ultrasonic welders run at 15 kHz, 20 kHz, 30 kHz, and 40 kHz frequencies.

Uses for Machine Device Ultrasonic Welding Machines Include:

  • Hand Guns
  • Bench Top Integrated Welders
  • Automation Actuator Heads and Modular Power Supplies
  • Closed Loop Process Controls: Energy Welding, Distance Welding, Time Welding, Force Welding, Automatic Frequency Tuning, and Variable Amplitude Output Control
  • Microprocessor and Standard Time models available
  • Tooling - Horns, Fixtures and Boosters for all makes, models, and brands of Ultrasonic Welders

Vibration Plastic Welding

Vibration plastic welding is used to join large plastic parts through frictional heat and pressure generated in a linear or orbital motion (vibration). The surface of one part is vibrated against the other, which is generally fixtured in a stationary position. Vibration welding lends itself to large or irregularly shaped parts and difficult to weld resins that do not work well with other methods. Vibration plastic welding produces high-pressure hermetic and very strong structural seals, and it is more forgiving (tolerance variations, wall thickness considerations) than most other methods.

Machine Device’s Vibration Welder Capabilities:

  • Automatic Frequency Control and Weight Compensation
  • Weld by Distance or Time
  • Multiple Program Memory Storage and Touch Screen Interface
  • Automatic Vibration Amplitude Control During Welding
  • Multistage Weld Sequencing
  • Printer Option for Weld History

Hot Plate Plastic Welding

Hot plate plastic welding is generally used to weld large and irregular shaped plastic parts with difficult contours and joint lines. Hot plate welding uses a heated platen to radiate heat through close proximity and melt the joining surfaces. After the part interfaces have been melted, the parts are brought together to form a molecular, permanent, and in many cases a hermetic seal. Hot plate welders are commonly available to join parts in either a vertical or horizontal plane.

Capabilities of Machine Device’s Hot Plate Welders:

  • Closed Loop Process Controls
  • Weld by Distance or Time
  • Touch Screen Interface
  • Multiple Program Memory Storage
  • Easy Tooling changeover
  • Pneumatic and Hydraulic Systems available
  • Non-Contact Systems

Custom Assembly Systems

All equipment and plastic assembly systems offered by Machine Device Corporation are designed to be used in manual, semi-automated, or fully automated production lines. Most application and production requirements can be met using our standard automation systems, which include assembly process heads, actuators, thrusters and modular process control packages that are specifically designed for custom systems integrators, automation work-cells and assembly lines.

  • Rotary Dial Index Tables
  • Walking Beam
  • In-Line
  • Pick and Place
  • Robotics
  • Vision System Inspection
  • Automatic Part Feeding
  • Continuous Motion
  • Self-Teach Positioning Units X, Y, and Z axis
  • Precision Link Conveyors


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