Plastic Recycling Machine

Plastic Recycling Machine

The main part of a plastic recycling machine is the extruder which is composedof the extrusion system, transmission system, as well as the heating andcooling system.

I. Components of Extruder
Extrusion System
The extrusion system consists of the barrel,mould, screw rod, hopper, and machine head. Plastic is processed via theextrusion system and softened into an evenly distributed flux. Riding on thepressure created in this process, the flux is then continuously extruded from themachine head by the screw rod.

1. The screw rod is the most important component of the plastic extruder.There’s a direct correlation between the quality of the screw rod and the extruder’sproduction efficiency and application range. Our premium screw rod is craftedwith high quality anti-corrosion alloy steel for added durability andreliability.

2. The barrel is a metallic cylinder that is highly resistant against elementssuch as heat, corrosion, pressure, and abrasion. It is commonly crafted fromalloy steel or composite steel laced with alloy steel.

The barrel is utilized in combination with the screw rod to melt, soften,compact, pulverize, and ventilate plastics. It is capable of continuouslyfeeding processed plastic to the molding system. In order to efficiently heatand soften plastics, the standard length of the barrel is made 15 to 30 timesits diameter.

3. The bottom of the feed hopper is equipped with an interceptor toconveniently regulate and stop material feed. On the side of the feed hopperthere are sight holes and a precision measurement calibration apparatus.

4. The interior of the machine head is crafted from alloy steel while theexterior is forged from carbon steel. The mold is contained within the machinehead.

Revolving plastic flux is redirected by the machine head to parallel linearpatterns and uniformly distributed into the inner mold. Shaping pressure isalso provided by the machine head. The plastic is compacted within the barreland processed through a filtering plate with multiple holes. It is then guidedalong a passageway past the neck region of the machine head and into the mold.The mold core works in conjunction with the mold sleeve for cross sectioning,reducing annular space until the plastic flux forms a continuous coating ofcompact tube around the core line.

In order to optimize the plastic passageways within the machine head andeliminate dead ends filled with residue plastic, shunt sockets are ofteninstalled; this prevents pressure fluctuations during extrusion. On top of themachine head there are mold rectification and calibration devices, utilized toadjust the concentricity of the mold core and mold sleeve. 

Plastic Granulator

Transmission System
The transmission system is utilized to drive the screw rod and provide itwith the necessary power and velocity required for efficient extrusionoperations. This system commonly comprises the reducer, bearing, and electricmotor.

Heating and Cooling System
Proper heating and cooling are necessary factors in the plastic extrusionprocess. 
1. Electrical heating is commonly utilized by more current plastic extrusionmachines. Methods of heating can be divided into resistance heating andinduction heating. Heating plates are installed on the machine body, neck, andhead, among other integral parts of the contraption. The heating equipmentexternally heats up the plastic within the barrel, increasing the temperatureto the prerequisite level of the treatment procedure.

2. The cooling equipment is designed to regulate the temperature range of theplastic treatment process. More specifically, it dissipates extra heat causedby the friction from the high RPM screw rod cutting action. Effective coolingprevents the scorching and decomposition of the plastic while eliminatingshaping difficulties.

Methods of cylindrical cooling are categorized under water cooling and windcooling. The majority of mini plastic extrusion machines utilize wind cooling.Jumbo sized extruders implement water cooling or a combination of both methods.The screw rod is primarily water cooled. The idea is to increase the solidmaterial delivery rate, and stabilize plastic output while enhancing productquality. Cooling of the feed hopper is designed to fortify the conveyor effecton solid materials by preventing the clogging of the hopper mouth, which iscommonly caused by melted plastic granules. Effective cooling is crucial forthe normal operation of transmission components.

II. Effects of Inverter on the EnergyConservation Properties of Plastic Recycling Machine
Features of the Inverter for SAJ Series Plastic Granulator
1. The low frequency torque operates at 180% output for exceptional workingperformance. 
2. Highest output is rated at 600Hz, sufficient for controlling the high speedelectric motor.
3. Optimized detection and protection capabilities safeguards against issuessuch as over pressure, under pressure, and overload.  This allows the machine to be instantaneouslyrestarted after being powering off.
4. Other safeguards include functions such as speed loss prevention duringtransition.
5. The electric motor dynamic parameter has automatic differentiation and ensuresthe accuracy and stability of the system. 
6. Emergency shut down during high speed operation is immediate.
7. The connectivity and control method of the input/output is responsive andversatile. 
8. SMT whole mount production techniques and conformal coat processing areimplemented for product stability.
9. The entire system runs on the latest IGBT power device from Siemens toensure product quality.

III. Auxiliary Equipment of PlasticRecycling Machine
The auxiliary equipment for the plastic recycling machine includes thepre-heater, line dispenser, line rewinder, tractionmechanism, straightening device, cooling device, meter counter, and the sparktesting apparatus. The extruder machine unit can be outfitted with differentattachments depending on its application. Available add-ons include theprinter, blow dryer, cutting instrument, etc.

The straightening device is an integral part of the plastic extrusion unit. Themost common criteria for product rejection is the off center eccentricity of extrudedplastics. Numerous types of contours within the line core are predominantly thecause of this phenomenon. Additionally, scratch damage on the sheath is oftenthe result of cable contours. These undesirable traits make the straighteningdevice an indispensable part of the extrusion unit. Numerous types andvariations of the straightening device are available. For instance, the rollerand cylindrical models comes in horizontal and vertical styles; the pulleymodel can be made with a single pulley or a pulley set; the corkscrew model hasdragging, straightening, and tension stabilizing capabilities.

Pre-heating Equipment
Pre-heating of the cable core is necessary for both sheath and insulationtype extrusions. Insulation extrusion does not permit the occurrence of gaspockets. This is especially important when performing the procedure with thinlayers. Prior to being extruded, the line core undergoes high temperaturepre-heating for the thorough removal of surface oil and moisture. The key tosuccessful sheath extrusion largely depends on maintaining a dry cable core andpreventing moisture induced gas pockets. Pre-heating also eliminates coldinduced residual pressure within extruded plastics.

In the extrusion process, pre-heating prevents cold lines from entering thehigh temperature machine head, creating a temperature disparity during thebrief intersection of plastic and the mold opening. This helps avoid extrusionpressure inconsistencies caused by plastic temperature fluctuation. Steadyextrusion capacity ensures product quality.

The pre-heating equipment utilized for the electrical heating of the line corewithin the extrusion machine unit demands an ample capacity to fully guaranteean accepted rate of temperature increase. This is crucial for achieving a highlevel of efficiency for the pre-heating of the line core and drying of thecable core. Pre-heating temperature is limited by line dispensing speed andshould be kept within range of the machine head temperature as a rule of thumb.

Cooling Equipment
When the layers of shaped plastic exit the machinehead, they should be immediately cooled in order to retain their shape, failureto do so will result in gravity induced deformations.

Water cooling is commonly used, and is distinguished between flash cooling andmild cooling, depending on water temperature. Flash cooling is achieved withdirect usage of cold water to bring down the temperature; it is the preferredtreatment of PVC plastic layers. While beneficial for shaping, this method is notrecommended for the crystallization of polymers due to its tendency to leaveinternal stress within the layer organization. A weak layer organization causescrack formation during product usage. Mild cooling is designed to reduceinternal stress. The water cooling trough is displaced with differenttemperature water (hot, warm, and cold) at various intervals, gradually shapingthe product while reducing its temperature. It is the ideal method for treatingPE and PP type extruded plastics.

IV. Control System of Plastic RecyclingMachine
The central control system of the plastic recycling machine is theintegration of standalone systems for heating, cooling, and technical parametermeasurements.

V. Molds for Plastic Recycling Machine
Molds can be either manual or electrical. Extrusion molds commonly have 18holes.  Granulator filter should beperiodically changed to eliminate impurities; filter clogging will increaseextruder pressure, making manual filter changing rather difficult.  In this case, the electric mold should beused to save time and man power.

VI. Features and Applications of PlasticRecycling Machine
By utilizing unique screw rod designs and a wide selection of accessories,the plastic granulator is equipped to manufacture recycled and multicoloredpellets from plastics of the type PP, PE, PS, ABS, PA, PVC, PC, POM, EVA, LCP, PET, and PMMA. The reducerimplements a high torque design, enabling noiseless operation and performancestability. The screw rod and feed cylinder have been specially treated foradded hardness. These high efficiency mixing components possess anti-abrasionproperties and have normal or vacuum exhaust systems that are designed toventilate moisture and waste gases during the production cycle. Resultinggranules are of a higher quality and more compact physically.

The plastic granulatingmachine is mainly utilized for processing waste plastic films includingindustrial packaging films, agricultural grounding films, giant greenhousefilms, beer bags, hand bags, etc. Other viable materials include compositessuch as pots, barrels, furniture, woven bags, beverage bottles, and varioushousehold items. 
  
PET Granulator

Ideal for processing all commonly seen waste plastics, our highly versatiledevice is extremely popular within the plastic recycling industry. 

VII. Unique Characteristics of PlasticRecycling Machine
1. Recyclable materials can be immediately processed after beingcategorized, broken down, and washed. Drying is not necessary. 
2. The entire granulating process is automated, including the procedures forraw material break down, washing, and feeding.
3. Utilization of the continuous heating system is optimized with high pressurefriction.  This system enables automatedheat induced production and avoids repeated heating while conservingelectricity. 
4. The automated power distribution system ensures safe and reliableoperations. 
5. The screw rod feed cylinder is crated from premium carbon structural steelfor added durability. 
6. Exterior design of the machine is streamlined and elegant.  It can be painted with according to clientside specifications. 

VIII. Technical Specifications of PlasticRecycling Machine

Related Names
Plastic Recycling Equipment | Plastic Shredder | Pelletizer