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Abstrak :
ABSTRAK
Utilization of palm oil wastes such as palm oil rods to become new materials could be an alternative to making composite materials using oil palm stem powder boosters. The palm oil rod is processed to be powdered and mixed with polyester resin for subsequent polymer composites. Then the material is used as material for the manufacture of motorcycle exhaust. The purpose of this study was to find out a good mixed formulation in the manufacture of motorcycle exhaust with polymer composite material reinforced by palm stem powder, knowing the process of making with polymer composite material reinforced powder of palm stem, and making exhaust polymer composite reinforced coconut powder palm oil. Motorcycle exhaust is made using press printing method. From the research results obtained a good composition in making motorcycle exhaust is 90% resin and 10% oil palm stem powder. During the hardening process the resin mixture and oil palm stem powder occur in temperature rise due to the resin and catalyst reaction up to 151 ° C and it takes 3 minutes for the composite mixture to fully harden. By using this waste of palm oil stem got composite exhaust product that is lighter 1,2 Kg compared with exhaust manufacer (conventional).

Abstrak :
ABSTRAK
Valves tipe aktuasi pneumatik telah berhasil digunakan dalam banyak aplikasi lab-on-chip karena biaya rendah dan teknik fabrikasi yang sederhana. Untuk membuat modul katup, penelitian ini menggabungkan beberapa teknik seperti additive manufacturing dan teknologi Computer Numerical Control (CNC) milling juga dengan teknik pembuatan polimer seperti Polydimethylsiloxane (PDMS) dan silikon. Di sini, kami memperkenalkan valves dengan aktuasi pneumatik yang tertutup pada keadaan normal dimana valves menggunakan Thermoplastic Polyurethane (TPU) film yang memiliki fungsi sebagai diafragma pada control chamber. Tingkat tekanan di control chamber dikendalikan oleh vacuum pump untuk menciptakan kondisi vakum dan membuka valves sehingga cairan dapat mengalir. Pada akhir penelitian kami, kami melakukan pengujian pada valves sehingga valves dengan aktuasi pneumatik dapat bekerja sesuai dengan yang kami inginkan.

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ABSTRACT
Pneumatic actuation type valves have been used successfully in many lab-on-chip applications because of their low cost and simple fabrication techniques. To fabricate valves module, it combine techniques like additive manufacturing and Computer Numerical Control (CNC) milling technology also with polymer fabrication such as Polydimethylsiloxane (PDMS) and silicon. Here, we introduce a normally closed pneumatic actuation valves which using Thermoplastic Polyurethane (TPU) film function as a diaphragm in control chamber. Pressure level in control chamber is controlled by vacuum pump to create vacuum condition and open valves so fluid can flow through. At the end of our study, we tested the valves so pneumatic actuation valves can perform as we desired.