Ο Djmolding είναι επαγγελματίας plastic injection manufacturing company.Plastic injection molding manufacturing is a china plastic injection molder and single source manufacturing company for molded plastic components.
Djmolding have injection machine x38 range 40Ton to 800Ton equipped with robot daily capacity 1.8 τόνοι πλαστικών μερών μέσ.
Djmolding have dust-free painting room 2 γραμμές - εκτύπωση με μαξιλάρι, μεταξοτυπία και βαφή με υπεριώδη ακτινοβολία.
Djmolding have NC machining (x6) αγοράστε γρήγορη πρωτότυπη υπηρεσία (πλαστικό και μέταλλο) και παραγωγή διαφόρων εξαρτημάτων μεταλλικής κατεργασίας.
Djmolding injection plastic parts showing,συμπεριλαμβανομένου
Molded plastic parts
Molded parts & printed
Insert molded parts
NC machined metal parts
Machined prototype parts
All of the showing products are producing by Djmolding πλαστική χύτευση με έγχυση.
Injection molding is the most commonly used manufacturing process for the fabrication of plastic parts. A wide variety of products are manufactured using injection molding, which vary greatly in their size, περίπλοκο, and application. The injection molding process requires the use of an injection molding machine, raw plastic material, and a mold. The plastic is melted in the injection molding machine and then injected into the mold, where it cools and solidifies into the final part. The steps in this process are described in greater detail in the next section.
Injection molding is used to produce thin-walled plastic parts for a wide variety of applications, one of the most common being plastic housings. Plastic housing is a thin-walled enclosure, often requiring many ribs και bosses on the interior. These housings are used in a variety of products including household appliances, consumer electronics, ηλεκτρικά εργαλεία, and as automotive dashboards. Other common thin-walled products include different types of open containers, such as buckets. Injection molding is also used to produce several everyday items such as toothbrushes or small plastic toys. Many medical devices, including valves and syringes, are manufactured using injection molding as well.
Process Cycle
Η διαδικασία κύκλος for injection molding is very short, typically between 2 seconds and 2 λεπτά, and consists of the following four stages:
- Σύσφιξη – Prior to the injection of the material into the mold, the two halves of the mold must first be securely closed by the clamping unit. Each half of the mold is attached to the injection molding machine and one half is allowed to slide. The hydraulically powered clamping unit pushes the mold halves together and exerts sufficient force to keep the mold securely closed while the material is injected. The time required to close and clamp the mold is dependent upon the machine – larger machines (those with greater clamping forces) will require more time. This time can be estimated from the dry cycle time of the machine.
- Η υγρασία μπορεί να προκαλέσει θανατηφόρο βραχυκύκλωμα στη θερμάστρα – The raw plastic material, usually in the form of pellets, is fed into the injection molding machine, and advanced towards the mold by the injection unit. Κατά τη διάρκεια αυτής της διαδικασίας, the material is melted by heat and pressure. The molten plastic is then injected into the mold very quickly and the buildup of pressure packs and holds the material. The amount of material that is injected is referred to as the shot. The injection time is difficult to calculate accurately due to the complex and changing flow of the molten plastic into the mold. Ωστόσο, the injection time can be estimated by the shot volume, πίεση έγχυσης, and injection power.
- Ψύξη – The molten plastic that is inside the mold begins to cool as soon as it makes contact with the interior mold surfaces. As the plastic cools, it will solidify into the shape of the desired part. Ωστόσο, during cooling some συρρίκνωση of the part may occur. The packing of material in the injection stage allows additional material to flow into the mold and reduce the amount of visible shrinkage. The mold can not be opened until the required cooling time has elapsed. The cooling time can be estimated from several thermodynamic properties of the plastic and themaximum wall thickness of the part.
- Εκτίναξη – After sufficient time has passed, the cooled part may be ejected from the mold by the ejection system, which is attached to the rear half of the mold. Όταν ανοίξει το καλούπι, a mechanism is used to push the part out of the mold. Force must be applied to eject the part because during cooling the part shrinks and adheres to the mold. In order to facilitate the ejection of the part, a mold release agent can be sprayed onto the surfaces of the mold cavity prior to injection of the material. The time that is required to open the mold and eject the part can be estimated from the dry cycle time of the machine and should include time for the part to fall free of the mold. Once the part is ejected, the mold can be clamped shut for the next shot to be injected.
After the injection molding cycle, some post processing is typically required. During cooling, the material in the channels of the mold will solidify attached to the part. This excess material, along with any λάμψη that has occurred, must be trimmed from the part, typically by using cutters. For some types of material, όπως τα θερμοπλαστικά, the scrap material that results from this trimming can be recycled by being placed into a plastic grinder, also called regrind machines or granulators, which regrinds the scrap material into pellets. Due to some degradation of the material properties, the regrind must be mixed with raw material in the proper regrind ratio to be reused in the injection molding process.