Engel’s Chinese affiliate debuts all-electric machine series
Wintec machines have equivalent performance to Engel’s e-motion all-electrics, albeit with fewer options
Following on from the release of its servo-hydraulic two-platen t-win machines in 2014, Engel’s Chinese affiliate Wintec has ventured into the all-electric arena with its “low-cost” e-win series of all-electric injection molding machines.
“The design and performance of our machines is exactly the same as that of our parent company’s e-motion all-electric presses,” says Wintec President Peter Auinger. “All that’s different are the colors and the availability of fewer options.” Wintec is initially offering the e-win injection machines in two machine sizes, with clamping force of 1,000 and 1,800 kN.
For now, the e-win machines are being manufactured at Engel’s Korean plant, which is equipped to manufacture all-electric machines. Once demand ramps up, perhaps next year, production will be transferred to Changzhou.
“e-win machines guarantee our clients a very fast return on investment,” says Auinger. “In this way, we enable processing businesses to get involved in all-electric injection molding technology at no risk and keep pace with the trend towards ever higher production quality.”
All movements are servo-electric. The high precision of the movements ensures stable processes and the highest possible number of good parts.
The machines also support shorter cycle times through the synchronous movements of the drive axles and the outstanding acceleration of the injection axis (up to 22 m/s²). The new machines require minimal floor space, while energy consumption is low. Further, compact dimensions enhance surface area productivity, a key indicator of efficiency for many businesses.
At Chinaplas, an e-win 1000-170 with clamping force of 1,000 kN was molding lamp shields. The shot weight was 14 g per component.
Since the lamp shields still need to be aluminum-plated before headlamp assembly, high demands are placed on the surface quality of the injection-molded parts. “Aluminum-plating would also reveal the tiniest irregularities and lead to rejection,” explains Auinger. “For this application, an all-electric injection molding machine that guarantees high precision and process stability is first choice. An automated process is also important when it comes to raising quality.”
The C2 control unit used in Wintec injection Moulding machines offers ample flexibility in terms of connecting robots of various types and brands. The C2 is characterized by intuitive operation, which reduces the risk of operator error. The entire machine status is displayed on a clear-cut single screen. A quick adjustment page groups the most important setting parameters in a compact way. To ensure an ergonomic workflow, the 15″ touchscreen can be swiveled out forward and is height adjustable. In terms of processing power, the C2 control unit outperforms control units of other machine producers in this area by 33 percent.
Wintec is adopting the same strategy for its e-win machines as it did for the t-win series of hydraulic machines. “In mid-April, the one-hundredth t-win machine came off the production line in Changzhou while Wintec has sold 120 units overall. Commenting on potential cannibalization of the market for Engel hydraulic machines, Auinger stated: “Two-thirds of Wintec customers are new, while one third are existing Engel users. If anything, our competition is other mid-range machine manufacturers.” Wintec cites a delivery time of 3 months for its machines, and currently has 20 in the production pipeline.
Since being launched on the market two years ago, the t-win series of hydraulic injection molding machines has become strongly established on Asian markets in such fields as automotive and white goods. “Above all, our customers value the excellent manufacturing and product quality of our machines,” says Auinger. “After placing their first order, many of them ordered additional t-win machines.” The t-win machines are used for high-volume standard applications which, although not requiring specialist technology, nonetheless place high demands on quality and process stability.
During Chinaplas, a t-win 4500-3300 injection molding machine with clamping force of 4,500 kN will impressively demonstrate the performance of the series. Lamp tubes were manufactured from polycarbonate in a two-cavity mold supplied by a Wintec client. These parts aksi need to be aluminum-plated before assembling.
The t-win machines are fitted with a servowin servo-hydraulic as standard. This cuts energy consumption by more than 60 percent in comparison with conventional hydraulic injection molding machines. Other factors that ensure the high energy efficiency of t-win machines include operating point optimization and the dual-platen design of the clamping unit, with a reduced moving platen weight and frictionless movements due to zero contact between tie-bars and platen. The linear guidance of the movable mold mounting platen reduces friction and keeps the mold area free of lubricating oil.
The dual-platen clamping unit was developed in Europe and guarantees maximum platen parallelism throughout the machine’s service life, which results in sensitive mold protection, excel-lent dynamics and short dry cycle times. Parallel auxiliary movements are also optionally supported. t-win injection molding machines are available in six sizes with clamping forces of between 4,500 and 17,500 kN.