A dedicated plastic mold,China plastic injection mould company
Established in 2000 , PIM(Topworks) plastic mold company supplying design of plastics,plastic mold making and custom injection molding service has 15 person with a 500 square meters plant in Huangyan (a so called Chinese plastic mold town with over 3 thousands Chinese plastic mold companies and manufacturer).
Today,it employs 80 employee(both Huangyan and Dongguan precision mold section,over 70 of them are plastic mold building professional engineers who own much rich plastic mold making experience ) and moves to a 4000 m² plant with Advanced Equipment (high speed CNC(over 20000rpm), EDM(electrical discharge machining), engraving machine,slow wire cutting machine, grind mchine, radical drills machine and gun drill machine,…) to build plastic mold tooling with the tight tolerance. Topworks plastic mold manufacturing service contains:
- Computer/Business Equipment;
- Packaging – Food/Beverage;
- Lawn & Garden;
- Consumer Appliance;
- Household Utility Ware
Endlessly,Topworks plastic mold manufacturer is dedicated to supplying the topest quality, tight tolerance plastic molds and become a key Chinese plastic mould company and tooling maker for excellent performance and good quality plastic mold tooling. We well recognize that the performance and quality from our plastic mold tooling products would have a powerful effects upon our clients’ performance and fame. Subsequently, we try to ceaselessly enhance our performances so as to supply helpful, risk-free and punctual plastic mold tooling products that always satisfy the performance & delivery demands from you, our win-win business partners.
What We Supply:
- Plastics Design;
- Rapid Prototyping;
- Multi-cavity Plastic Mold;
- Family Plastic Mold;
- Hotrunner Plastic Mold;
- Plastic Molding(Injection and Blow);
- Secondary Operations;
Tips to Make the Mold Buying Process Easier
Buying a mold is a complex and sometimes tedious process, but a few rules can help injection molding companies make the process easier. They’re not written in stone, but you’ll find that to most moldmakers they are gospel.
- Send an RFQ that is as detailed as you can make it. Don’t make the moldmaker guess what you want. Moldmakers are a lot of things, but mind-readers they’re not! Be specific about the type of mold, the number of cavities, the steel, expectations of mold life, and any guarantees you’ll need. If you aren’t certain about any of these items, get input from your moldmaker to help you determine exactly what type of mold is best for your requirements. The more detailed the RFQ, the more accurate the moldmaker’s quote will be.
- Be honest about why you are requesting a quote. If you need a ballpark figure to submit to marketing, say so. But don’t ask for a complete engineering evaluation and quote, then casually mention it’s just a preliminary quote on a project that’s at least a year away. Or you’re just fishing. Quoting is time-consuming, and moldmakers want to spend their time quoting jobs that have good promise of becoming a reality soon.
- Respect the intellectual property of the moldmaker. The knowledge and creativity a moldmaker has acquired are his or her intellectual property. Keep those ideas and suggestions confidential when going out for quote. If you choose another mold shop to do the work, don’t tell moldmaker “B”to make it the way moldmaker “A” suggested in his quote. Remember, moldmaker “B” didn’t quote it that way and may not understand why moldmaker “A” made that suggestion.
- Consider the benefits of forming a true partnership with your moldmaker(s).Bring in
him or her early on your project for input; work with him in regard to costing goals and budgets; life of the project and part quantity expectations. Moldmakers don’t like being mushrooms! The best purchasing is done by those who truly know their suppliers and play as a team, openly and honestly, to the benefit of both companies
- Communicate with and solicit communication from your moldmaker on a regular basis. Many provide Gantt charts or other types of progress reports online, or provide online access to regularly posted updates. Knowing where the mold build stands and if it is on schedule is critical, so request scheduled information stands and if it is on schedule is critical, so request scheduled information
- Make your payments on time per the agreement. Few moldmakers can afford to play banker, and building a mold entails many, sometimes large, up-front expenses on their part. There are a number of ways to approach the payment schedule, such as 30% down, 30% at half completion, 30% at completion, and 10% upon part approval and mold shipment. Different moldmakers have different plans, or will work with you on a payment schedule that is fair, equitable and will benefit both companies.
- Changes to the part design can mean changes to the mold. Remember, the more changes you make during the mold build, the less likely you are to get a mold in the lead time or at the price quoted. Understand that when you require part design changes, it often leads to changes in the mold design, which can add both time and cost to the mold build.
- Define up front when the mold is considered complete. When is a mold complete? That often determines when final payment is made. Is the mold complete upon approved part sample? Upon shipment? Usually a mold is complete when it is capable of producing a part according to specifications and dimensions on the part print. Most moldmakers will make small changes and tweaks to get the mold to spec to make the part according to print dimensions. A decision to make a change to the part, and consequently to the mold, after the part has met print specs doesn’t mean the mold isn’t finished. When the part meets print specifications and dimensions, the mold is complete. Changes are done via an ECO (engineering change order) and will be priced accordingly.
- If it sounds too good to be true, it probably is.You may find a moldmaker who quotes very low prices on a job. Maybe he’s hungry, or maybe his overhead is low so he can price lower than other shops. However, any quote that comes in too low might not be the bargain is appears to be.
When purchasing a mold, it’s especially true that you get what you pay for. Your molded components are only as good as the mold they come from, so be sure your mold is optimum to mold the parts you need for the life of the program.
Why and where to use plastic molds
A plastic mold is any tool made in whole or in part of a plastics material (excluding industrial thermosetting laminates), and in which the plastic contributes substantially to the utility of the tool. Such tools range all the way from those made entirely of plastics to metal tools to which a plastics working surface has been applied. There is only one proper approach to evaluating the suitability of plastics for a tool. That is to consider plastics as an independent family of engineering materials with unique combinations of engineering properties, which indicate how the materials will behave under specific service conditions. Under some conditions plastics provide outstanding benefits in terms of lower cost, more rapid plastic injection mold making, etc.; under other conditions, they should not be used at all. The success of a particular plastics mold is solely dependent on the degree to which the plastic mold manufacturers understand
- the plastic mould design requirements, and
- the capabilities of plastics materials. The second area is the one causing most of the problems in injection plastic molding today.
Picture if you will, a plastic mold maker specifying a material for a particular plastic mold making detail. He knows exactly where he stands with iron and steel on making plastic molds. He has ready material on hand that gives him weights, characteristics and costs. He also has his experience which tells him what to expect from a particular metal. On the other hand, he knows very little about plastics as a die material. Naturally he will specify that with which he is most familiar.
Becoming “familiar” with plastics is relatively simple; understanding them to the degree that their full capabilities can be realized is more difficult. Each member of the growing plastics family offers a relatively broad range of properties; but within each group, specific types offer more specific combinations of properties. In using metals, a standard alloy can be specified which is supplied within guaranteed compositional limits and often with guaranteed minimum strengths.
In specifying and using plastics, no such standard grades exist. Also, for the most part, tooling plastics are “made” in situ; that is, the resin is catalyzed and cured in the tooling shop in the final shape of the tool. Since the way in which the material is formulated, catalyzed, fabricated and cured determines to a large degree the end-properties of the material, the plastic mold manufacturing engineer must have a greater understanding of the technology of plastics than he does of metals. The plastic mold making engineer unfamiliar with plastics should work closely with the materials supplier at the start. Reliable, reproducible physical properties can be obtained in plastics, but only by processing the materials properly.
Epoxies are the most widely used tooling plastics. They provide an excellent balance of physical and mechanical properties, low shrinkage, and compatibility with glass fiber reinforcements. Other plastics should not be overlooked. Many of them can provide distinct advantages in tooling for many plastic molding companies, if properly used. Phenolics provide high heat resistance; polyesters provide low materials cost and excellent processibility; room temperature-vulcanizing silicone rubbers (not actually a plastic ) provide heat-resistant, flexible mold materials; foams of phenolic, epoxy and urethane provide high bulk with low weight; and so on. Such specialty applications as the use of flexible polyvinyl chloride for molds for concrete, nylon mandrels for machine- and hand-bending of aluminum tubing, and thermoformed thermoplastic sheet for molds for forming urethane foams indicate that other plastics also can offer benefits.