Injection molding basic and Plastic injection molding services

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Plastic injection molding is often thought to be a hard process which is a wrong notion of the people.

Plastic injection molding is often thought to be a hard process which is a wrong notion of the people. A variety of parts are manufactured using Injection molding process which varies from the smallest component to an entire body component of a car. 

The machinery involved in plastic injection molding is costlier and very sensitive and complex equipment. These machines are called as injection molding machines. The machines used are also heavy and some even weigh upto tons of kilogram. But only when these kind of machines are used the final product turns out to be a quality product. This is so because the plastics are fed into these machines and they are heated until they become fluid. This shows that the machines should withstand high temperature and hence the need for a complex equipment. 

Plastic materials used for the injection moulding process are thermoplastics or thermosetting plastics. Both the thermoplastic and thermosetting plastics are polymers. Some widely used thermoplastics are nylon, polyethylene, and polystyrene while bakelite, vulcanized rubber are the widely used thermosetting plastic. Sometimes a polymer with a very high elasticity is also used. Such a polymer is called elastomer.

The plastic takes the shape of the cavity or the mold used and get solidified or settled in it. After being solidified it is ejected out After some time molded material is ejected out from the cavity. The same cavity can be used to make any number of molds. The mold is of any desired shape.

The injection molding machine has two components namely the injection unit, the mold and the clamping unit. One should not forget that the process involved in plastic injection molding is not as tough as the size of the machinery. It is a very simple and a systematic process. Initially the injection molding process starts with the injection of the plastic resins or polymers into the injection barrel. The resins are heated to melting point and now the fluid is poured into the mold which is of the desired shape needed. The mold has two components namely the injection mold and the ejector mold. The melted plastic resin in poured into the mold using a sprue the injection mold. And the ejector mold helps in ejecting the plastic part after it is solidified in the mold without any damage using ejecting pins.

The next step is the application of hudraulic or mechanical pressure. This is done in order to allow the trapped air in the mold to escape. This is called the dwelling process. After the pressure is applied the air cavities move to one corner of the mold. Then the fluid is allowed to solidify and the mold is cooled. Finally the solidified plastic part is ejected from the mold either manually or automatically. 

After the cooling process there is often change in the mechanical that is both physical and chemical properties of the plastic part. The thickness of the mold is one of the important design considerations of the injection molding process. Usually a mold with an uniform wall thickness is preferred. Thus it reduces the change in mechanical properties of the plastic part.

Not anyone out there clearly knows all about injection moulding. This article explains all about plastic injection moulding. Infact this is like a guide to learn plastic injection moulding

for any kinds of plastic molding requirements,or blow molding requiremets please visit 

www.deekayengg.com write us about your requirements the company is complete one stop resource for all kinds of plastic molding and blow molding services.

Introduction to Injection Molding - Molding deekayengg.com

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this video is from deekayengg.com manufacturing plastic injection molding component onmolding machines
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Plastic Molders and plastic moulding process.: Tutorial:The blow molding process

Plastic Molders and plastic moulding process.: Tutorial:The blow molding process: "The blow molding process hdpe blow mold amnufacture by dee kay engg works India BLOW MOLDING AND INJECTION MOLDINGDEE KAY ENGG WORKS&nbs..."

Tutorial:The blow molding process

The blow molding process

hdpe blow mold amnufacture by dee kay engg works India

BLOW MOLDING AND INJECTION MOLDING

DEE KAY ENGG WORKS  ensure excellent blow molded and INJECTION MOLDING PRODUCTS AND MOLDS and is very price competitive. DEE KAY ENGG WORKS has audited, qualified and worked  for over 15 years. The company is  delivering parts  lower prices but the same quality, service and terms as a domestic supplier.

 Blow molding is more suited to the mass production of small disposable containers, while rotational molding favors large hollow shapes.

Blow Molding

Blow molding is a molding process in which air pressure is used to inflate soft plastic into a mold cavity. It is an important industrial process for making one-piece hollow plastic parts with thin walls, such as bottles and similar containers. Since many of these items are used for consumer beverages for mass markets, production is typically organized for very high quantities. The technology is borrowed from the glass industry with which plastics compete in the disposable or recyclable bottle market.

Blow molding is accomplished in two steps: 

(1) fabrication of a starting tube of molten plastic, called a parison (same as in glass-blowing); and

 (2) inflation of the tube to the desired final shape. Forming the parison is accomplished by either of two processes: extrusion or injection molding.

Extrusion Blow Molding. This form of blow molding consists of the cycle illustrated below. In most cases, the process is organized as a very high production operation for making plastic bottles. The sequence is automated and usually integrated with downstream operations such as bottle filling and labeling. It is usually a requirement that the blown container be rigid, and rigidity depends on wall thickness among other factors.

Extrusion blow molding: (1) extrusion of parison; (2) parison is pinches at the top and sealed at the bottom around a metal blow pin as the two halves of the mold come together; (3) the tube is inflated so that it takes the shape of the mold cavity; and (4) mold is opened to remove the solidified part.

Injection Blow Molding. In this process, the starting parison is injection molded rather than extruded. A simplified sequence is outlined in below. Compared to its extrusion-based competitor, the injection blow-molding process has a lower production rate, which explains why it is less widely used.

Injection blow molding: (1) parison is injection molded around a blowing rod; (2) injection mold is opened and parison is transferred to a blow mold; (3) soft polymer is inflated to conform to a blow mold; and (4) blow mold is opened and blown product is removed.

In a variation of injection blow molding, called stretch blow molding (see below), the blowing rod extends downward into the injection molded parison during step 2, thus stretching the soft plastic and creating a more favorable stressing of the polymer than conventional injection blow molding or extrusion blow molding. The resulting structure is more rigid, with higher transparency and better impact resistance. The most widely used material for stretch blow molding is polyethylene terephthalate (PET), a polyester that has very low permeability and is strengthened by the stretch-blow-molding process. The combination of properties makes it ideal as a container for carbonated beverages.

Stretch blow molding: (1) injection molding of the parison; (2) stretching; and (3) blowing.

Materials and Products. Blow molding is limited to thermoplastics. Polyethylene is the polymer most commonly used for blow molding; in particular, high density and high molecular weight polyethylene (HDPE and HMWPE). In comparing their properties with those of low density PE given the requirement for stiffness in the final product, it is more economical to use these more expensive materials because the container walls can be made thinner. Other blow moldings are made of polypropylene (PP), polyvinylchloride (PVC), and polyethylene terephthalate.

Disposable containers for packaging liquid consumer goods constitute the major share of products made by blow molding; but they are not the only products. Other items include large shipping drums (55 gallon) for liquids and powders, large storage tanks (2000 gallon), automotive gasoline tanks, toys, and hulls for sail boards and small boats. In the latter case, two boat hulls are made in a single blow molding and subsequently cut into two open hulls.

Rotational Molding

Rotational molding uses gravity inside a rotating mold to achieve a hollow form. Also called rotomolding, it is an alternative to blow molding for making large, hollow shapes. It is used principally for thermoplastic polymers, but applications for thermosets and elastomers are becoming more common. Rotomolding tends to favor more complex external geometries, larger parts, and lower production quantities than blow molding. The process consists of the following steps: (1) A predetermined amount of polymer powder is loaded into the cavity of a split mold. (2) The mold is then heated and simultaneously rotated on two perpendicular axes, so that the powder impinges on all internal surfaces of the mold, gradually forming a fused layer of uniform thickness. (3) While still rotating, the mold is cooled so that the plastic skin solidifies. (4) The mold is opened, and the part is unloaded. Rotational speeds used in the process are relatively slow. It is gravity, not centrifugal force, that causes uniform coating of the mold surfaces.

Molds in rotational molding are simple and inexpensive compared to injection molding or blow molding, but the production cycle is much longer, lasting perhaps ten minutes or more. To balance these advantages and disadvantages in production, rotational molding is often performed on a multicavity indexing machine, such as the three-station machine shown below The machine is designed so that three molds are indexed in sequence through three workstations. Thus, all three molds are working simultaneously. The first workstation is an unload-load station where the finished part is unloaded from the mold, and the powder for the next part is loaded into the cavity. The second station consists of a heating chamber where hot-air convection heats the mold while it is simultaneously rotated. Temperatures inside the chamber are around 3750C(7000F), depending on the polymer and the item being molded. The third station cools the mold, using forced cold air or water spray, to cool and solidify the plastic molding inside.

Rotational molding cycle performed on a three-station indexing machine: (1) unload-load station; (2) heat and rotate mold; (3) cool the mold.

A fascinating variety of articles are made by rotational molding. The list includes hollow toys such as hobby horses and playing balls; boat and canoe hulls, sandboxes, small swimming pools; buoys and other flotation devices; truck body parts, automotive dashboards, fuel tanks; luggage pieces, furniture, garbage cans; fashion mannequins; large industrial barrels, containers, and storage tanks; portable outhouses, and septic tanks. The most popular molding material is polyethylene, especially HDPE. Other plastics include polypropylene, ABS, and high-impact polystyrene.

if u want to know more and learn more or have any questions or have any requirements of molds or plastic products please visit and write us  we reply in 12 hours.www.deekayengg.com/contact.html

Auto Parts Moulding - plastic toolings,molulding plastic ,blow mould ,toolingIndustrial Parts Moulding and Electrical Parts Moulding Manufacturer and Exporter | Accurate Moulds and Tools Corporation (India), Ludhiana

BLOW MOLDS - plastic toolings,molulding plastic ,blow mould ,toolingIndustrial Parts Moulding and Electrical Parts Moulding Manufacturer and Exporter | Accurate Moulds and Tools Corporation (India), Ludhiana

THIS PAGE IS FROM A BLOW MOULD INFORMATION SIGHT,
www.blowmoulds.info/moulding_products.

www.blowmoulds.info

One can have complete information in regard of plastic on this site , these people also provide consultations for any kinds of plastic products ,the page www.blowmoulds.info/topics.html also provide us basic knowledge and exposure about plastics and other subjects relevant to plastic ,
              One can write a mail if you need just the prices of blow moulds , they provide estimate cost as well as releailable resources for our buy requirements ,


here is the copy of thier homepage.

We Specialise in manufacturing of Blow moulds. and Plastic injection moulding and blow Molds.











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"PLASTIC MOULDING"

AND FOR ALL KINDS OF "BLOW MOULDS"




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Our buyers in france can visit us www.blowmoulds.info/fr

Designers and manufacturers plastic products and toolings
Plastic injection moulding and Blow mouldings
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Works : Malerkotla Road, Village Gill, Ludhiana (PB), India
Postal adress: 84-F, Kitchlu Nagar, Ludhiana - 141001 (PB), India
Ph : +91-9855003551, 9814340551

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Plastics injection molding ,Plastic Tool Manufacturing .Blow Molding

Plastics injection molding ,Plastic Tool Manufacturing .Blow Molding tools,Designing plastic parts,Plastics products, Customised Plastic products . Blow Molds

 

     

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Works : Malerkotla Road, Village Gill, Ludhiana (PB), India
Office : 84-F, Kitchlu Nagar, Ludhiana - 141001 (PB), India
Ph. 091 9855003551 
Email : ask@deekayengg.com :deekayenggworks@yahoo.co.in

"SERVICES" "TOOLING, TOOLS ,BLOW MOLD MAKERS ,PLASTIC INJECTION MOLDING,PLASTIC TOOLINGS,BLOW MOLDS,CUSTOMISED PLASTIC PRODUCTS,MOULDS,BLOW MOULDING MOLDS ,,PLASTIC INJECTION MOULDS,PLASTIC TOOLING,PLASTIC TOOLING MANUFACTURING,MANUFACTURERS OF PLASTIC TOOLS,

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Dee Kay Engg Works consolidates its position in plastic industry

Dee Kay Engg Works consolidates its position in plastic industry
go through the press release of Ms DEE KAY ENGG WORKS :www.deekayengg.com
Dee Kay Engg Works consolidates its position in plastic industry

Dee Kay Engg Works is privileged to introduce itself as a premium organization, which has been in the plastic business for 15 years producing original Plastic Injection Moulding Machine and other related products.



FOR IMMEDIATE RELEASE

PRLog (Press Release) – Dec 10, 2010 – With a truly unparalleled approach to the present plastic industry, Dee Kay Engg Works is privileged to introduce itself as a premium organization, which has been in the plastic business for 15 years producing original Plastic Injection Moulding Machine and other related products. The company in recent years has transformed into a global player redesigned and updated website http://plastictoolingmanufactures.tradeindia.com/ with a range of innovative products having excellent product information. The company specializes in the design and manufacture of Plastic Injection Moulding products from initial designs to implementation. The new company's website showcases latest products info, user friendly product navigation and details regarding the company's profile.

The company in a decade has earned industry goodwill, owing to the objective to maintain the machines simplicity and at the same time not neglecting the demand for a precise and accurate machine to produce high quality and perfect mouldings. The company's after sales service is second to none, and just to reach it, a client need to give one phone call. The company manufacture a mould to client's specifications and supply the machine as a complete working package...ready to go! The company operates for designing and developing wide range of products such as Plastic Blow Moulds, Plastic Injection Moulds, Plastic Electronic Moulds, Injection Moulded Products etc.

All machines, measuring and machining equipment are double tested using a standard quality checking procedure, all of which hold a certificate of conformity and are set aside solely for this purpose and in a regular basis checked for proper functioning. Moreover, the organization is committed to global environment concern and look after it, therefore, manufacture products from highly specified plastics, where suited, can manufacture plastic parts from reprocessed materials. The company also check the waste materials to minimum thus reducing carbon footprint.

We are thankful to tradeindia.com, the largest B2B marketplace of India who redesigned the website with impeccable content quality and good snaps.

Visit us at: http://plastictoolingmanufactures.tradeindia.com/

Plastic molding and plastic Granual polymerisation. " Polymer Chemistry"

  Hello all, 

                       So as I said  in my last topic that we will countinue .further i am starting . 

There are many process techniques  of polymerisations but as a conclusion we can say there are 4 main types of  process polymerising

In actual practice there are many different techniques  used to carry out polymerization reactions.

                                                   

                                                   However, most involve one of four  

general methods of polymerization: The 

polymerization of the monomer or reactants in 

bulk, in solution, in suspension, and in emulsion 

forms. The bulk and solution methods are 

used for the formation of both addition and 

condensation type polymers, whereas suspension 

and emulsion techniques are used largely 

for addition polymerizations.                                                                     

                                                                     

1.Bulk Polymerization. This type of polymerization 

involves the reaction of monomers 

or reactants among themselves without placing 

Catalyst activated bond opening (ethylene 

polymerization)

them in some form of extraneous media such 

as is done in the other types of polymerizations.

                                                                    

Two types of behavior are observed in bulk

 polymerizations. 

               first  The polymer is    

soluble in the monomer during all stages of the

 polymerization, and a monomer-soluble initiator  

is used. As polymerization progresses, viscosity 

increases significantly, and chain growth 

takes place in the monomer or polymers dissolved

 in the monomer until all of the monomer 

is consumed.

            In the second case  The polymer is insoluble

 in the monomer system. In such systems, the po

lymerization is believed to occur within the

 growing polymer chains because very high molecular 

weights are formed even though the 

polymer chain drops out of the monomer solution

2.Solution Polymerization. Solution polymerization is similar to bulk polymerization except

that the solvent for the forming polymer in bulk polymerization is the monomer, whereas the solvent in solution polymerization is usually a chemically inert medium. The solvents used may be complete, partial, or non solvents for the growing polymer chain. When the monomer and the polymer are both

soluble in the solvent, initiation and propagation of the growing polymer chains take place

in the oil or organic phase. Because of the mass action law, rates of polymerization in solvents

are slower than in bulk polymerizations, and the molecular weight of the polymers formed

is decreased.

          

3. Suspension Polymerization. Often called  “pearl” polymerization,"pearl” polymerization, this technique normally is used only for catalyst-initiated or free radical addition polymerizations. The monomer is mechanically dispersed in a liquid, usually water, which is a non solvent for the monomer

as well as for all sizes of polymer molecules  that form during the reaction.

4.Emulsion Polymerization. This is a technique in which addition polymerizations are camed out in a water medium containing an emulsifier (a soap) and a water-soluble initiator. It is used because emulsion polymerization is much more rapid than bulk or solution ipe, and reaction conditions provides additionalcontrols over the reaction. Polymerization techniques can have a significant

effect on the number, size, and characteristics of the polymer molecules formed and thus

will have a significant effect on the properties of the polymer. Thus, batches of a polymer

such as polystyrene, which can be made by any of the four polymerization techniques described

above, will differ, depending on which type of polymerization method was used to

make the material.

As I initially said thte polymers and plastic is a very very broad and sky is the limit so ,not even a part of it can ge coverd in the topic of mine , But I think that every plastic injection  molder shoul know and be aware with. the  the basic of polymer 

Its ok for today  and I will be here tommorow again with some new information and basic relevant  to all the people  who provide these PLASTIC ENGG SERVICES ,to the people of world , plastic ,plastic moulding,injection moulding , injection moulds  and blow Molds 

                                             YOU CAN VISIT US ON

                                             www.deekayengg.com 

                                             www.deekayengg.com /contact.

  

HDPE blow molding tool.

                                                                                                                                                                                          Write us for your all kinds of requirements and inquiries in regard of :

                                             PLASTIC INJECTION MOULDING,

                                                PLASTIC BLOW MOULDING,                                                      

                                  PLASTIC INJECTECTION MOULDING TOOLS

                                                    PET BLOW MOULDS 

                                                  BLOW MOULDING TOOLS.

We provide a new customised  Blow mould in 7 days if required by our customers and a medium size injection mould in 2 weeks.

Plastic molding and plastic resin basic " Polymer Chemistry"

Hi,
      As today its the first day ,I will be explaining  just the basics of "Plastics" As its a wide term and sky is the limit for plastics , there an endless number of resin and granual bases but we will get familier with the basics ,so Today will provide  a basic review of polymer chemistry, with emphasis on the distinctions between various structures and  their influence on the Engineering of Plastics

                                                                                                                                                                    The "Chemistry of  Polymer "      The chemical structure and the nature of plastics materials have a significant relationship not only to the properties of the "Plastic" but to the ways in which it can be processed, designed,or otherwise translated into an end-product.


                                                                   Basically, all polymers are formed by the creation of chemical linkages between relatively small molecules monomers to form very large molecules or polymers; the same idea as connecting  boxes  on a train track to form a train,the boxes being monomers and the train a polymer. Like boxes, the molecules must have the ability to be coupled at either end .
                                                                                         Actually, in polymer formation, the process is more like forming many, many trains in a rail road yard simultaneously from the boxes  available in the yard in a competitive fashion,so that the switching engine that moved the fastest would form the longest train while the slowest switching engine would form the shortest train, due to depletion of the available rolling stock by the concurrent train-forming process ,The train-forming process of polymerization comes to a stowhen factors prevent any additional boxcars from beingadded to any of the trains being assembled.Thus, we ultimately end up with trains having a variety of lengths, yet all composed of the same kinds of boxes. The rail road analogy described above is basically what happens in an “addition” type of polymerization.

                                                                 The above process is characterized by the simple combination of molecules without the generation of any by- products formed as a result of the combination. The molecules that combine do not decompose to produce fission products which then remain as part of the reaction debris or need to be removed from the reaction to either allow it to continue the molecule- building process or to ensure the formation of a pure polymer


                    In reality the addition-type process can occur in several ways
First  way simply involves the external chemical activation of molecules that causes them to start combining with each other in a chain-reaction-type fashion (by the bonding of atoms directly within the reacting molecule).

second Another way for an addition polymerization to occur is through a rearrangement ofatoms within both reacting molecules, but still without the net loss of any atoms from the polymer molecule



  third way for addition polymerization to occur is for a molecule composed of a ring of atoms to open up and connect with other ring-type molecules being opened up under the influence of the proper catalytic activators, once again with no net loss of any atoms from the polymer structure




fourth In another type of polymerization reaction, which has been called “condensation” poly-merization, the chemical union of two molecules can be achieved only by the splitting out of a molecule (usually small) formed by the atoms, which must be removed from the two molecules being joined to allow the couplingprocess or polymerization to continue. This is the type of polymerization involved in the formation of some nylons, phenolics, amino resins, and polyester pre-polymers.



There is yet another method by which polymers  

may be formed, but it is in reality simply 

a sequential combination of the previous two

processes. Such a process is used in the formation

of plastics such as the polyesters and      

the polyurethanes.

                      There are many process techniques  of polymerisations but as a conclusion we can say there are 4 main types of  process polymerising
                       WE will discuss about then tomm.on our blog . .
any suggestions in regard to the blog are always welcome ,
we are always available to the plastic  engg and other people who need help or suggetions to their current and new plastic projects.
you can write me bu visiting the site described below or could write in the inquire for . i will get that straight  and reply back asap.

Er.G P Singh.
www.deekayengg.com
www.blowmoulds.info

Plastic Molders and plastic moulding process.: The World Plastic Molding,molding tools and Eng...

Plastic Molders and plastic moulding process.: The World Plastic Molding,molding tools and Eng...: "Hello to all , I was planning to start a blog from a some time &..."

The World Plastic Molding,molding tools and Engg plastic services .

Hello to all ,
                     I was planning to start a blog from a some time  , and by the Grace of God  I am going to start today , from now my whole experiance in my field will be at disposal and help to all  in Plastic Engg tools and   PlasticToolings,Plastic Molders  community in the whole  worlds ,
                                                                                 So not wasting much time I am providing a small introduction of   Myself , My job and Experiance in the field of Plastic Engg tools , Plastic  Toolings design ,development plastic products and assembly of plastic products  and  and CNC systems for machine tools for tool shops  and CNC injection moulding system This blog will be updated every 8 hours and in case of any assistence from us Our Engg. team is available round the clock .    
                                Myself  G P Singh  and we are in India ,I am a professional  working in the field of plastic from a time span of around 15 years , I am Engineer by my qualitfications and worked for 4 initial year as a Plastic Engg in a Medium scale Plastic moulding industry in India, After  and along I worked  as consultant in plastic project development and assistence in geting new setups and trainings to newly passed out engg,
                            We started our own plastic industry  in 1996 begining was from a very small set up  , and now we are one of the well know Plastic engg and tooling manufacturing company with a workforce of 35 persons,
We  have two different companies  one is Accurate Moulds and tools corp. India www.deekayengg.com and the second is  . Dee Kay Engg Works , www.deekayengg.com ,we are in exports of Plastic tools and plastic moulding products.and all services which are related to plastic , we are having a complete setup begining from designing a plastic products , designing the tooling for the component , cnc machinng of the tools an moulds , assembly of the moulds , after completion we are having complete set up for blowing and moulding plastic jobs , so we do sampling in house , moreover if customer have requirements we do provide them large bulk productions ,

                     So complete infrastructre is at one place and we provide our services worldwide to a variety of customers ,We at DEE KAY ENGG WORKS ;www.deekayengg.com provides free consultancy services for starting a new plastics projects, and even the project which couldnt complete due to any hassels is taken and handeled by us , our perfection and experiance in the field makes our company group perfect .
                      Our services for manufacturing moulds is fastest India as we provide a blowing tool ie pet blowing tool ,moulds in around 7 working days which is the fastest ,for a blow mold tool.,tooling manufacturing is our profession we suppose we can provide best pricies and  services

Any now coming back to where we were  The blog ,
my blog will be providing you knowledge of plastic begining from the basics of polymers uptill complete product assemblies  line of actions and the problems face during the production process may its toolings or its productions of components .
Anyone related may be a moulding manufacture or blowing manufacture ,mould tooling design and manufacturing ,can write me in  for help and the kind of assitence required ,we will definately sereve in the best possible manner ,
A new topic and information will be provided everyday by us ,which provide the assitence to new plastic and moulding manufacturers.
Thanks for giving my blog time to read , we assure you logical discussions , benefitial kownlege and assistence to all the comunity people in world.
You can visite oursite on the topics page to know more in plastics and our products and services .
www.deekayengg.com/blow_mould.html
www.deekayengg.com/plastic_tooling_manufacturers
www.deekayengg.com/services.html
www.deekayengg.com/topics.html
                                  Soon you will get the first topic by us and the initial steps to know more about plastic and the plastic tooling world.