black plastic sheet

  • 9 Replies
  • 8217 Views
*

beng

  • Newbie
  • *
  • 3
black plastic sheet
« on: July 26, 2006, 16:28 »
does anyone know of a good source for black plastic sheeting other than ebay?

*

noshed

  • Hero Member
  • *****
  • Location: East London
  • 4731
black plastic sheet
« Reply #1 on: July 26, 2006, 19:21 »
Try: http://www.kaysdiscountgarden.co.uk/
Also Tesco do cheap perforated plastic sheeting
Self-sufficient in rasberries and bindweed. Slug pellets can be handy.

*

shadow0000

  • Newbie
  • *
  • 1
The Plastic Molding Processes:
« Reply #2 on: February 11, 2009, 09:11 »
1. Injection Molding

In Injection Molding, melted plastic is forced into a mold cavity. Once cooled, the mold can be removed. This plastic molding process is commonly used in mass-production or prototyping of a product. Injection molding machines were made in the 1930's. These can be used to mass produce toys, kitchen utensils, bottle caps, and cell phone stands to name a few.

2. Blow Molding

Blow molding is like injection molding except that hot liquid plastic pours out of a barrel vertically in a molten tube. The mold closes on it and forces it outward to conform to the inside shape of the mold. When it is cooled, the hollow part is formed. Examples of blow molding products are bottles, tubes and containers.

Equipments needed in setting-up a blow molding business are relatively higher than injection molding.

3. Compression Molding

In this type of plastic molding, a slug of hard plastic is pressed between two heated mold halves. Compression molding usually uses vertical presses instead of the horizontal presses used for injection and blow molding. The parts formed are then air-cooled. Prices of equipments used for compression molding are moderate.

4. Film Insert Molding

This plastic molding technique imbeds an image beneath the surface of a molded part. A material like film or fabric is inserted into a mold. Plastic is then injected.

5. Gas Assist Molding

Also called gas injection molding is used to create plastic parts with hollow interiors. Partial shot of plastic is then followed by high-pressure gas to fill the mold cavity with plastic.

6. Rotational Molding

Hollow molds packed with powdered plastic are secured to pipe-like spokes that extend from a central hub. The molds rotate on separate axes at once. The hub swings the whole mold to a closed furnace room causing the powder to melt and stick to the insides of the tools. As the molds turn slowly, the tools move into a cooling room. Here, sprayed water causes the plastic to harden into a hollow part. In this type of plastic molding, tooling costs are low and piece prices are high. Cycle time takes about 40-45 minutes.

7. Structural Foam Molding

Structural foam molding is a process of plastic molding usually used for parts that require thicker walls than standard injection molding. Inserting a small amount of nitrogen or chemical blow agent into the plastic material makes the walls thicker. Foaming happens as the melted plastic material enters the mold cavity. A thin plastic skin forms and solidifies in the mold wall. This type of plastic molding can be used with any thermoplastic that can be injection molded.

8. Thermoforming

In this plastic molding process, sheets of pre-extruded rigid plastics are horizontally heated and sucked down into hollow one-piece tools. When the hot plastic solidifies, its shape conforms to that of the mold.

Tooling costs are usually low and piece prices vary on the machinery.

Plastic molding is a very technical process. It needs experts in this type of manufacturing business for it to be competitive in the market. Therefore, a very scientific and systematic study should be first made before going into this endeavor.

I got this in some site that i research in google hope you will like it guys... Have a nice day to all of you!!!



__________________
Plastic Industry

*

Gwiz

  • Guest
Re: black plastic sheet
« Reply #3 on: February 11, 2009, 09:39 »
how very informative.

*

GrannieAnnie

  • Grandmother of the Forums
  • Hero Member
  • *****
  • Location: Lincolnshire
  • 21087
Re: black plastic sheet
« Reply #4 on: February 11, 2009, 11:18 »
but not very relevant to the original question.

*

Gwiz

  • Guest
Re: black plastic sheet
« Reply #5 on: February 11, 2009, 12:25 »
quite right, grannie,
how about this one.. ;)
http://www.diyplas.co.uk/

*

GrannieAnnie

  • Grandmother of the Forums
  • Hero Member
  • *****
  • Location: Lincolnshire
  • 21087
Re: black plastic sheet
« Reply #6 on: February 11, 2009, 12:52 »
Oh wonderful Qwiz!

I want this one for the chooks run!!!! just hose it off!!!!

http://www.diyplas.co.uk/artificial_grass.asp

*

Gwiz

  • Guest
Re: black plastic sheet
« Reply #7 on: February 11, 2009, 15:37 »
would that be possable? ( I know nothing at all about chickens )

*

bendix

  • Newbie
  • *
  • 1
Re: black plastic sheet
« Reply #8 on: March 13, 2009, 10:24 »
does anyone know of a good source for black plastic sheeting other than ebay?

I think you should try some plastic molding industries... or rapid prototyping industries for that black plastic sheet.. or try metroplastics.com ...



_________________
Rapid Manufacturing

*

David.

  • Guest
Re: black plastic sheet
« Reply #9 on: March 13, 2009, 21:03 »
does anyone know of a good source for black plastic sheeting other than ebay?

If you're looking for black heavy duty dpm (which I use for mulching/suppressing weeds) I get mine from B&Q in 4m x 15m rolls that cost around 18 ish, but I haven't bought one since the end of last year when several newspapers were printing 20% off at B&Q vouchers and I threw a couple of rolls in my shop.

If you're interested in some (or something else), apparently there's currentley 10% off virtually everything all this weekend + monday to celebrate B&Q's  40th Birthday + if you spend 50+ they will give you a voucher  that will give you 10% off everything for next 2 weeks.
« Last Edit: March 13, 2009, 21:12 by David. »



xx
Black Plastic for growing

Started by Digger the Dog on Equipment Shed

3 Replies
964 Views
Last post April 15, 2018, 15:20
by Digger the Dog
xx
Which weed control sheet?

Started by craynerd on Equipment Shed

10 Replies
4003 Views
Last post December 12, 2013, 14:00
by savbo
xx
Thin sheet steel on a circular saw bench?

Started by Kleftiwallah on Equipment Shed

2 Replies
1348 Views
Last post March 03, 2011, 18:10
by Kleftiwallah
xx
glass or plastic?

Started by chris1976 on Equipment Shed

6 Replies
3800 Views
Last post June 07, 2006, 12:31
by stompy
 

Page created in 0.067 seconds with 36 queries.

Powered by SMFPacks SEO Pro Mod |