Ali lahko grelne cevi iz ogljikovih vlaken izboljšajo stroje za pihanje?

Plastic bottles are now widely used across various industries in daily life, including the beverage industry, daily chemical industry, food industry, household goods industry, and pharmaceutical and chemical industries. Plastic bottles have become the dominant type of container in contemporary society, having long replaced traditional glass or metal bottles. The production of plastic bottles requires PET multifunctional blow molding machines. The working principle of the blow molding machine is to heat the plastic preform to a certain temperature, and then use a special process to blow it into the desired shape and size. So, can ogrevalne cevi iz ogljikovih vlaken be used in blow molding machines? The answer is yes.

Običajne grelne cevi v strojih za pihanje

Trenutno se v strojih za pihanje najpogosteje uporabljajo infrardeče grelne cevi z volframovimi nitkami. Vendar imajo infrardeče grelne cevi pomanjkljivost: zaradi počasne sublimacije volframovega vlakna pri visokih temperaturah in reakcije s sledovi kisika v zaščitnem plinu grelno vlakno sčasoma pregoreva, kar je neizogibna težava.

Zakaj se lahko ogrevalne cevi iz ogljikovih vlaken uporabljajo v popolnoma samodejnih strojih za pihanje?

1. Podobna oblika in struktura:

Ogrevalne cevi iz ogljikovih vlaken share the same shape and structure as infrared heating tubes. Both have similar external structures and materials, which can be made from either transparent quartz tubes or ruby quartz tubes. All the advantages of infrared heating tubes, such as acid and alkali resistance, high temperature tolerance, quick startup speed, and low thermal inertia, are also present in carbon fiber heating tubes.

2. Razlike v grelnih elementih:

The key difference lies in the heating element material. Infrared heating tubes use tungsten filaments, while ogrevalne cevi iz ogljikovih vlaken use carbon fibers. Carbon fiber is a new material that has gained popularity in the last decade due to its excellent physical and chemical properties, and it is widely used in various fields. The biggest advantage of carbon fiber over tungsten filament is that under the protection of inert gas or in a vacuum environment, the physical properties of carbon fiber are much more stable—several times more stable than tungsten filament. This means that as long as the vacuum environment is maintained, carbon fiber heating elements can operate continuously, a significant advantage that tungsten filaments cannot match.

3. Spektralna zmogljivost:

Infrardeče grelne cevi z volframovo žarilno nitko lahko po prilagoditvi z zunanjimi kvarčnimi cevmi ali drugimi parametri uravnavajo valovno dolžino med 1,06 in 1,2 µm. V nasprotju s tem imajo grelne cevi iz ogljikovih vlaken območje sevanja od 1,5 do 15 µm. To območje valovnih dolžin se bolj prekriva z infrardečim spektrom, ki ga absorbirajo funkcionalne skupine v plastiki, zato se za analizo plastičnih sestavnih delov pogosto uporabljajo infrardeči spektrometri. Zato so grelne cevi iz ogljikovih vlaken primernejše za segrevanje plastičnih delov.

Čeprav infrardeče grelne cevi trenutno delujejo precej dobro, zaradi česar številni proizvajalci niso predstavili novih strojev za pihanje cevi za ogrevanje ogljikovih vlaken, sta glavna problema učinkovitost ogrevanja in življenjska doba. Vendar so ti pomisleki večinoma nepotrebni.