![mmd scarf mmd scarf](https://key0.cc/images/small/1509479_c75bebf36c2371da47969d89603a75a9.png)
The single acting system fills then dispenses, with no output when it is filling (recharging), hence the "single acting." There are two types of piston metering systems, single-acting and double-acting. These are designed for highly abrasive service and can handle almost any viscosity or filler loading. Instead, piston-type metering systems are used in applications with changing back pressure or with heavily filled materials. Also, in potting and encapsulating electronics, the potting material often contains abrasive or a high content of fire retardants, which can create problems in the gear pumps that can include high wear. However, Ashby Cross does not use the gear pumps in composites molding due to the slip inherent in their design. Said to be very accurate and simple in design, the advantage of a gear pump is the ability to adjust flow and ratio on demand. Gear metering makes use of two high precision gear pumps that accurately meter specific amounts of material to achieve the designed mix ratio. Two basic designs are used in these applications, piston metering and gear metering. “We also have machines that will dispense shots as small as 7 grams. “You can run the machine continuously to make a shot size of 100 or 1,000 lb of material while maintaining the ratio between two to five component materials being supplied,” explains Hap Phillips. Its SRD Series, used for closed molding, reportedly blurs the line between continuous flow and metered shots.
Mmd scarf series#
Johannson admits the increased speed and automation requires a greater investment than more traditional equipment, but that is seen as necessary for high series production.Īdvanced Process Technology (APT, Middlesex, N.J.) has supplied MMD equipment since 1969. “We introduced our P4 machine for use in automotive with epoxy and polyurethane years ago, but only now are getting a lot of requests.” This robotic system quickly builds up the preform using standard spray roving, which is a cheaper raw material. One trend noted by Aplicator’s marketing VP Clas-Åke Johansson is the recent growth in automation of glass fiber preforming. These are mainly used for making wind blades and marine hulls and decks using polyester, vinyl ester or epoxy resins. Its VIM5 systems, used for vacuum infusion, include up to five outlets for attaching resin feed lines into the mold, which can be automatically opened and closed sequentially. Its current systems include the Ri2 for RTM and the IPP-8000/T200 for application of mostly polyester and vinyl ester adhesives in wind blades.
Mmd scarf plus#
Although the system can be upfitted with all of the material conditioning (heat and degas) and advanced control options (flowmeters), it is described by 2KMNA managing director Gary Bauer as “A simple, easy-to-use machine that enables control of the RTM or infusion process yet is cost-effective.” He adds that 2KM tries to strike a balance between having standardized products to keep costs down and maintain reliability, “but then there are new developments and specialty niches which require unique setups, plus 2KM’s main strength is developing innovative solutions for challenging processing needs.”Īplicator Systems AB (Mölnlycke, Sweden) has supplied a variety of MMD equipment to the composites industry for more than 30 years. Model-driven design and analysis for sustainable lightweight designĢKM’s ProcessGearMix RTM was introduced at the JEC Europe 2013 show, developed specifically for injecting resin into a closed, pressurized mold.