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The plane plastic expansion tube
The plane plastic expansion tube
Supplier Info
[China Supplier]
Contact Person : Mr. Liu Musheng
Tel : 86-769-81917331
Fax : 86-769-81917331
Product Detail
expansion tube plastic expansion tube, OEM and ODM service is OK The plane plastic expansion tubeBasic Info.            Shaping Mode : Injection Mould         Product Material : PP               specification : 10mmX32mm

We can do any shape and structure plastic housing, shell or any other plastic including acrylic products, only if you can provide CAD or Pro E file or just your idea, then we can help design and manufacture, here below is our profession.

  1).Precision Plastic Injection Mold Design:        We design and manufacture custom molds for plastic injection using AutoCAD software, including SolidWorks, UG , and pro/E. We focus on close tolerance machning using advanced CNC milling techniques,EDM equipment, and the exceptional skills and creativity of our team of employees.

 2). Plastic Injection Mold Manufactring facility:  Our  5000 square meters facility is located in the Dongguan Guangdong. We maintain and continually upgrade our state-of-the-art equipment. 3).Our customers:     We serve customers across the United States and globally. Industries that we serve include optical, office and imaging equipment, medical devices, aeronautical, automotive, packaging, sporting goods, Department of Defense, and consumer products. 4).TS16949 and ISO 9001:2008 Quality Management System.    View our ISO 9001:2008 and TS16949 certificate.   5).capable      We have 20 the mould group and 22 designer,we can guarantee that your mould delivery and quality

Our Service: 1. We can design and manufacturing plastic products according to your requirement 2. Size: Any size as per your requirements 3. Color: Any colors available 4. We own CNC processing centers, CNC spark working machinery and various advanced mold tooling equipment. We also have established a CAD / CAM / CAE mold design and development center 5. Our range covers from eletrical accessory, auto parts, household appliance, medical appliance, car accessory, security parts, toy parts ect. 6. Our quality, price, after sale services are really competitive 7. The product in the picture are our customers' OEM products, it's only for reference Our advantage and achievements: 1. SGS certification, strictly control the procedures accordingly 2. with software such as CAD, PRO-E, Solidworks, highly qualified engineering team 3. We have our own factory equiped with high precision machinery, such as CNC-EDM 4. Our maximum productivity: 500-1000sets/year 5. We can offer mould as big as 2000*2000*1800mm 6. We can make up part`s unit weight from small 3grams to 15kg big part.

About Injection Molding

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, complexity, 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 and bosses on the interior. These housings are used in a variety of products including household appliances, consumer electronics, power tools, 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  The process cycle for injection molding is very short, typically between 2 seconds and 2 minutes, and consists of the following four stages: 1, Clamping - 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. 

2, Injection - 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. During this process, 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. However, the injection time can be estimated by the shot volume, injection pressure, and injection power. 

3, Cooling - 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. However, during cooling some shrinkage 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 the maximum wall thickness of the part. 

4, Ejection - 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. When the mold is opened, 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 flash that has occurred, must be trimmed from the part, typically by using cutters. For some types of material, such as thermoplastics, 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.

Materials

Material NameAbbreviationTrade namesDescriptionApplications
Acetal POM Celcon, Delrin, Hostaform, Lucel Strong, rigid, excellent fatigue resistance, excellent creep resistance, chemical resistance, moisture resistance, naturally opaque white, low/medium cost Bearings, cams, gears, handles, plumbing components, rollers, rotors, slide guides, valves
Acrylic PMMA Diakon, Oroglas, Lucite, Plexiglas Rigid, brittle, scratch resistant, transparent, optical clarity, low/medium cost Display stands, knobs, lenses, light housings, panels, reflectors, signs, shelves, trays
Acrylonitrile Butadiene Styrene ABS Cycolac, Magnum, Novodur, Terluran Strong, flexible, low mold shrinkage (tight tolerances), chemical resistance, electroplating capability, naturally opaque, low/medium cost Automotive (consoles, panels, trim, vents), boxes, gauges, housings, inhalors, toys
Cellulose Acetate CA Dexel, Cellidor, Setilithe Tough, transparent, high cost Handles, eyeglass frames
Polyamide 6 (Nylon) PA6 Akulon, Ultramid, Grilon High strength, fatigue resistance, chemical resistance, low creep, low friction, almost opaque/white, medium/high cost Bearings, bushings, gears, rollers, wheels
Polyamide 6/6 (Nylon) PA6/6 Kopa, Zytel, Radilon High strength, fatigue resistance, chemical resistance, low creep, low friction, almost opaque/white, medium/high cost Handles, levers, small housings, zip ties
Polyamide 11+12 (Nylon) PA11+12 Rilsan, Grilamid High strength, fatigue resistance, chemical resistance, low creep, low friction, almost opaque to clear, very high cost Air filters, eyeglass frames, safety masks
Polycarbonate PC Calibre, Lexan, Makrolon Very tough, temperature resistance, dimensional stability, transparent, high cost Automotive (panels, lenses, consoles), bottles, containers, housings, light covers, reflectors, safety helmets and shields
Polyester - Thermoplastic PBT, PET Celanex, Crastin, Lupox, Rynite, Valox Rigid, heat resistance, chemical resistance, medium/high cost Automotive (filters, handles, pumps), bearings, cams, electrical components (connectors, sensors), gears, housings, rollers, switches, valves
Polyether Sulphone PES Victrex, Udel Tough, very high chemical resistance, clear, very high cost Valves
Polyetheretherketone PEEKEEK  Strong, thermal stability, chemical resistance, abrasion resistance, low moisture absorption Aircraft components, electrical connectors, pump impellers, seals
Polyetherimide PEI Ultem Heat resistance, flame resistance, transparent (amber color) Electrical components (connectors, boards, switches), covers, sheilds, surgical tools
Polyethylene - Low Density LDPE Alkathene, Escorene, Novex Lightweight, tough and flexible, excellent chemical resistance, natural waxy appearance, low cost Kitchenware, housings, covers, and containers
Polyethylene - High Density HDPE Eraclene, Hostalen, Stamylan Tough and stiff, excellent chemical resistance, natural waxy appearance, low cost Chair seats, housings, covers, and containers
Polyphenylene Oxide cPPO Noryl, Thermocomp, Vamporan Tough, heat resistance, flame resistance, dimensional stability, low water absorption, electroplating capability, high cost Automotive (housings, panels), electrical components, housings, plumbing components
Polyphenylene Sulphide PPSRyton, Fortron Very high strength, heat resistance, brown, very high cost Bearings, covers, fuel system components, guides, switches, and shields
Polypropylene PP Novolen, Appryl, Escorene Lightweight, heat resistance, high chemical resistance, scratch resistance, natural waxy appearance, tough and stiff, low cost. Automotive (bumpers, covers, trim), bottles, caps, crates, handles, housings
Polystyrene - General purpose GPPS Lacqrene, Styron, Solarene Brittle, transparent, low cost Cosmetics packaging, pens
Polystyrene - High impact HIPS Polystyrol, Kostil, Polystar Impact strength, rigidity, toughness, dimensional stability, naturally translucent, low cost Electronic housings, food containers, toys
...Ribbed boss in cornerRounded cornerThin wall of thickness t with ribsPart redesigned with thin wallsCost Drivers Material cost The material cost is determined by the weight of material that is required and the unit price of that material. The weight of material is clearly a result of the part volume and material density; however, the part's maximum wall thickness can also play a role. The weight of material that is required includes the material that fills the channels of the mold. The size of those channels, and hence the amount of material, is largely determined by the thickness of the part.Production costThe production cost is primarily calculated from the hourly rate and the cycle time. The hourly rate is proportional to the size of the injection molding machine being used, so it is important to understand how the part design affects machine selection. Injection molding machines are typically referred to by the tonnage of the clamping force they provide. The required clamping force is determined by the projected area of the part and the pressure with which the material is injected. Therefore, a larger part will require a larger clamping force, and hence a more expensive machine. Also, certain materials that require high injection pressures may require higher tonnage machines. The size of the part must also comply with other machine specifications, such as clamp stroke, platen size, and shot capacity. The cycle time can be broken down into the injection time, cooling time, and resetting time. By reducing any of these times, the production cost will be lowered. The injection time can be decreased by reducing the maximum wall thickness of the part and the part volume. The cooling time is also decreased for lower wall thicknesses, as they require less time to cool all the way through. Several thermodynamic properties of the material also affect the cooling time. Lastly, the resetting time depends on the machine size and the part size. A larger part will require larger motions from the machine to open, close, and eject the part, and a larger machine requires more time to perform these operations.Tooling cost The tooling cost has two main components - the mold base and the machining of the cavities. The cost of the mold base is primarily controlled by the size of the part's envelope. A larger part requires a larger, more expensive, mold base. The cost of machining the cavities is affected by nearly every aspect of the part's geometry. The primary cost driver is the size of the cavity that must be machined, measured by the projected area of the cavity (equal to the projected area of the part and projected holes) and its depth. Any other elements that will require additional machining time will add to the cost, including the feature count, parting surface, side-cores, lifters, unscrewing devices, tolerance, and surface roughness. The quantity of parts also impacts the tooling cost. A larger production quantity will require a higher class mold that will not wear as quickly. The stronger mold material results in a higher mold base cost and more machining time. One final consideration is the number of side-action directions, which can indirectly affect the cost. The additional cost for side-cores is determined by how many are used. However, the number of directions can restrict the number of cavities that can be included in the mold. For example, the mold for a part which requires 3 side-action directions can only contain 2 cavities. There is no direct cost added, but it is possible that the use of more cavities could provide further savings. 

The plane plastic expansion tube

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