Results 1 to 5 of 5

Thread: Vacuum Pneumatic Conveying of PVC Components

  1. #1
    nick_w Guest

    vacuum pneumatic conveying of PVC components

    Hi,

    I am wanting to pneumatically convey small flexible PVC parts (10x20x10mm) without any risk of damage. The only problem is I cant feed with a rotary or screw feeder as i cant guarantee the product wont be damaged on pinch points. (?) Is there another way of controller feeding apart from through an opening from the hopper?

    I am planning on vacuum pneumatic conveying in batches from the hopper (bulk storage). However, if I want to stop the flow of product and therefore stop the vacuum pump, the inclined/vertical pipework will become full up with product. I imagine this is going to introduce problems when i restart the pump. Will the product begin to flow again or will a blockage occur? Should the incline/vertical pipe be stepped up with horizontal sections so all the product doesnt fall into one part of pipe? Would introducing air bleed points in the pipe help?

    Any help would be much appreciated.

    Regards
    Nick Williams

  2. #2
    Marco Aurelio Flores-Verdugo

    Marco Aurelio Flores-Verdugo

    Consultant

    Tecmen S.A. de C.V.

    Tecmen S.A. de C.V.

    Professional Experience 5 Years / 0 Month Marco Aurelio Flores-Verdugo has 5 Years and 0 Month professional experience

    Discussions 280 Marco Aurelio Flores-Verdugo acceded to 280 discussions, Articles 0 Marco Aurelio Flores-Verdugo wrote 0 articles, Publications 0 Marco Aurelio Flores-Verdugo Flores-Verdugo released 0 publications

    Searching nothing specified

    Know-How Design (142) Marco Aurelio Flores-Verdugo used this tag 142 times, Pneumatic Conveying (80) Marco Aurelio Flores-Verdugo used this tag 80 times, Training (15) Marco Aurelio Flores-Verdugo used this tag 15 times

    pneumatic system feed

    Yes .

    you can use a vibrating feeder , Roy marcus in South Africa used a pressurized system with a vibrating feeder , long time ago for large rock particles, this might be of use to you.

    he also used direct feed into a fan for box demolition purposes.

    Rotary feeders with wide clarances and lock hoppers can also be used if you are afraid of the possivility of pinching , or a vacumm system . it all depends how far are you going and the especific pressure drop.

    rotary tables have been used and almos any thing you can imagine , partcle attrition concersn are mostly related to bend and discharge points impact.


    Good luck

    regards

    marco
    TECMEN
    Consultant in:
    Sponge Iron (DRI) handling
    Sponge Iron DRI Automated Storage Firefighting and Root Cause Analysis
    Pneumatic Conveying Consultants
    Phone 5281 8300 4456.

  3. #3
    Dennis Hauch - Freeport, TX, USA Guest

    Conveying PVC Parts

    Nick,

    Vacuum conveying is the best choice because a pressure seal is not required at the material pickup point (no rotary valve).

    A vibratory feeder can be used to meter the product but a pinch valve in the material feed line might prove to be a simpler solution. A pinch valve should not damage the small PVC parts.

    Your system is a dilute-phase system which requires that the material feed be stopped and the convey line be allowed to clear before the vacuum blower is stopped.

    Convey lines should be vertical or horizontal only, avoid inclined / sloped lines. Stepped lines or booster stations are not required for your system.

    Regards,

    Dennis Hauch

  4. #4
    nick_w Guest
    Thanks for all your advice. Some more things for me to think about.

    regards
    Nick

  5. #5
    Join Date
    May 04
    Posts
    10

    It's been done before

    Transferring moulded components from storage or directly from the moulders has been done many times before by my company. A well known razor manufacturer uses our systems for just this purpose to bring all of the components to an assembly line.
    If the distances are not too far we would use a special fan powered 'soft' venturi (no airlocks etc), a selected grade of plastic transfer pipe and a final separator with no metal impact points.
    Send me your email for further deetails/contacts etc.
    If you don't believe true Low Velocity is possible ask me for a demo CD!

Similar Threads

  1. Conveying Aluminum Flake with Pneumatic Vacuum System
    By let4@mac in forum Pneumatic Conveying
    Replies: 3
    Last Post: 22nd June 2015, 15:25
  2. Replies: 0
    Last Post: 13th December 2014, 17:23
  3. Pneumatic Conveying of Rice Husk with a Vacuum + Pressure system
    By arpitkumar in forum Pneumatic Conveying
    Replies: 3
    Last Post: 14th November 2014, 14:13
  4. Pneumatic Conveying Components
    By Author in forum Publications, Standards, Patents, Catalogs
    Replies: 0
    Last Post: 22nd May 2013, 16:01
  5. Replies: 3
    Last Post: 8th July 2002, 15:45

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO