What do you need to pay attention when making the WPC CO-extrusion decking ?

WPC extrusion machine

Hubei Gaoxin WPC Extrusion Co.,ltd (2017-4-25)

Nowadays,WPC coextrusion decking is more and more popular,but what should we pay attention when making this new coextrusion product ?Today,we will tell you the different process from the regular WPC product.

 

WPC CO-extruder can use 45 single screw extruder.

The main extruder can use 65/132 conical twin screw extruder.

共挤机用45单螺杆挤出机,主机用65/132锥双挤出机。

 

WPC pellets

Coextrusion layer raw material should be pelletized,not powder.We also sell if you need. For 140X25 hollow decking with 0.6mm coextrusion layer,it will need 10kgs coextrusion pellet ,200 kgs core material to make 60 meters.

共挤层面料必须是粒料,造好的颗粒,不能是粉料。对于140X25空心地板,0.6mm的共挤层,10kgs面料和200kgs芯料可以生产出60米。

WPC coextrusion machine

The coextruder should euip with the hot air dryer.

共挤机需要配置干燥机。

hot air dryer

Prior to production,in general the WPC CO-extrusion pellet should dry 4-5 hours under the 80℃.If the pellet is too wet,it should take about 6 hours to dry.

The coextruder temperature was decided by the coextrusion pellet,probably about 140℃.If the pellet was made by engineering plastics,the temperature should be around 180-190℃.

在生产之前,木塑共挤粒料需要在80度温度下烘干4-5个小时。如果粒料太潮湿,就需要干燥约6个小时。

共挤机的温控是由共挤粒料来决定,大概是140度左右。如果粒料是用工程塑料做的话,温控应该在180-190度左右。

WPC co-extrusion tool

The coextrusion mould should equip with 10 moulds temperature control area.Mould coextrusion parts has 6 heater plugs,left part has 4 heater plugs.

Ordinary,the main extruder has 10 temperature control area,4 are for screw,1 for extruder core center,5 for moulds.Since there are only 5 mould temperature control zone,so you need to configure a power cabinet with the other 5 mold temperature control zones. The coextruder has 4 temperature control area,3 are for screw,1 for the part which the coextruder connected with mould.

 

Whether the 2 co-extruded mould plates are cooled by water or not is adjusted according to the actual situation.

 

The WPC CO-extrusion speed is slower than the ordinary WPC, and it is about 35-45cm/ minutes.

共挤模具需要配置10个温控,模具共挤板需要6个温控,其他部分需要4个温控。一般普通的挤出机只有10温控,4个是螺杆温控,1个是合流芯温控,5个是模具温控。既然一般65/132锥双挤出机只有5个模具温控区,那么你还需要配置一个电力柜装上5个模具温控区。共挤机有4个温控,3个是螺杆温控,1个是共挤机和模具连接部分温控。

共挤模具上的2块共挤板是否通水冷却或通水大小根据实际情况进行调整。

共挤木塑的挤出速度比普通木塑慢,一般140共挤空心地板的挤出速度约35-45cm/分钟。

heater plate

one set of WPC co-extrusion mould has 10 pieces of heater plates.

一套木塑共挤模具需要10块加热板。

electrical control cabinet

As usual,for the common 65/132 conical twin screw extruder,there are only 5 moulds temperature control area ,so you need to equip with an electrical control cabinet which have installed 5 moulds temperature area.

既然65/132锥双挤出机只有5个模具温控区,那么你还需要配置一个电力柜加上5个模具温控区。

 

the production of WPC co-extrusion profile

The coextrusion layer thickness is around 0.6mm.

The thickness of the coextrusion layer can be adjusted by the coextrusion machine rotational speed.

木塑共挤层大约0.6mm就可以了。

共挤层的厚薄可以通过调节共挤机转速来做适当调整。

the production of embossing WPC profile

If you want to make WPC CO-extrusion on-line embossing,you can put the embosser between the dies head and calibrators.

After Coextruded decking coming out from the dies head,it needs to press closely on both sides when going through the calibrators and water tank,after cooling well,then you can start to do the post processing.  Otherwise it is easy to bend.

如果你想做木塑共挤在线压花,把压花机放在机头和定型模之间即可。

共挤地板从机头出来成型后,必须通过定型模和水箱进行两侧压紧等充分冷却后方可进行后道处理,否则容易侧弯。

co-extrusion WPC profile

The cutting blade of the co extruded decking requires special saw blades which need high speed rotation.Otherwise,it is easy to peel.

共挤地板的切割锯片需要特殊的,需要高速转动的锯片,否则产品容易崩口。

what WPC co-extrusion layer looks like

Please have some references on this video:https://youtu.be/42NsfMb1954

If you are interested,please feel free to contact with us.

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