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Article in Plast Panorama from HI[11]

Udgivet October 14th, 2011, posted in: Ikke kategoriseret by Comments Off

Newly developed transport topic translated from Plast Panorama October edition 2011 p. 28-29

Allesoe Custom Machinery has in collaboration with Netstal that produce injection moulding machines, optimize the process sequence transporting subjects from machine to storage in a box.

- The concept is developed based on our experience, especially in the medical industry where the demand today is almost 0 percent error rate. So now we have for once opted to make this our own product, said Peter E. Soendergaard, who is responsible for the daily operations and strategic development of the company and goes about a number of details incorporated into the overall system which can also be used for other machine types than Netstal IMM.

Many thorough details

A signal from the injection moulding machine, based on the quality of the plastic mould part, operates a Distributor Chute that disseminate the mould parts into two or possibly three destinations – respectively good shot, reject shot – and sample shot. As standard, the Distributor Chute switches between the three positions at a speed of 0.7 seconds – but at very low cycle times, e.g. on fully electrical injection moulding machines, the sorting can be carried out in 0.4 seconds.

Peter E. Soendergaard with Box Changer Unit, Conveyor Belt and Distributor Chute

The chute of the distributor – or slide as it is also called – can be coated with different coatings to ensure the quality of injection molded parts. For example, a polyurethane coating ensures that plastic mould parts do not bounce so much and thereby remains inside the machine frame, which increases production output. In addition, the coating also prevents any shock damage to occur on the produced items. Flat chutes may be necessary in low machine frames, and it will often be advantageous to coat these particular chutes with a layer of PTFE (Teflon), so that subjects will not linger or be delayed by lying longer in the chute. This is significant due to the strict traceability requirements relating to batch delivery of the finished items. The Box Changer unit can also be equipped with barcode reader such that each batch can be traced back to the individual injection molding machine.

The Conveyor Belt is covered with a transparent plastic plate, and has a number of features that is designed to protect the plastic moulded parts during transport, for instance shielding against capillary effect of oil incorporated into the frames of the conveyor.

- We have benefited greatly from a trainee from the DTU, who has optimized energy usage and paid attention to many details on the Conveyor Belt, which is also approved by the FDA, says Peter E. Soendergaard.

Mould parts are evenly distributed in plastic boxes from the Conveyor Belt by a subject distributor – in the form of a plastic plate to maximize the capacity of each storage box.

- When we present the equipment people sometimes notice that the subject distributor seems vulnerable, but it is fitted with a magnetic clutch, so it doesn’t break but merely falls off upon impact, mentions Peter E. Soendergaard.

Many manufacturers of injection moulded parts use a single box underneath the injection moulding machine or at the end a conveyor belt, and it is then the operator’s task to monitor and replace the box when it is full. With a Box Changer unit, each box is shifted automatically after a signal from the injection moulding machine when a predetermined number of mould parts have been produced. The existing version of Allesoe Box Changer unit contains 5 boxes at a time but it is in the process of being developed into 10 boxes with a buffer for empty boxes and an exit wagon for filled boxes.

Allesoe, which annually has exported almost 20 percent peripherals abroad, including to Brazil, USA and Czech Republic, exhibited at the HI[11]fair together with Saxe Hansen, who has registered dealership of Netstal injection moulding machines and Stäubli robots in Denmark. Also, Allesoe were in mid-September present at an exhibit day at Arburg, which launched the fully electric and energy-saving eDrive moulding machine in Greve.

Among some of Allesoe’s other products for the plastics industry is an Adjustable Material Arm for feeding of materials to injection moulding machines and a Static Discharge Station which diverts static electricity from plastic granules. The new product line has recently been compiled in a catalogue that describes each product for handling injection moulded plastic parts.

An injection moulding production consumes a lot of resources in maintenance, quality assurance and data registration, and therefore it is crucial that you have  reliable peripheral equipment to support the operators in their work with the surrounding processes. Many customers have asked for an automated system solution for dealing with plastic mould parts after they have been injected, and we have received a lot of positive responses to our product line, which covers a wide range of the needs that arise when you have to implement a reliable and efficient injection moulding process.

Overall, we must say that our debut at HI Fair has been a positive experience and we’ve had some interesting conversations with customers and partners, which in our view is more optimistic about the future than what we experienced just a few months ago, concludes Peter E. Soendergaard, who believes it is very likely that Allesoe Custom Machinery will be attending HI[13]