some ways for injection molding cost cut


Plastic injection molding is a very cost-effective way to produce high-quality parts. Even so, there are a number of things you can do to save even more money on a project without sacrificing anything in the finished product.

Use designs that minimize materials. Features like ribs and gussets can make a part stronger while using less material. Even a small reduction multiplied by the many parts in a production run and potentially many production runs can add up to big savings.

Ensure adequate draft. In injection molding, as in all manufacturing processes, time is money. Parts that have the appropriate amount of draft allow faster ejection from the mold and save precious seconds.

Consider mold longevity in your design. The more frequently you have to replace your molds, the higher your overall cost of producing parts. Consider the features of a mold that allow it to hold up over time as you design your parts.

Use materials that meet—but don’t grossly exceed—your needs. While it’s critical that your raw materials meet your requirements, using resins that go far above them or have qualities unnecessary to your project, is simply wasting money. Don’t skimp, but don’t splurge. Explain to your material provider what you are trying to accomplish but also let them know that you want to do so economically.

Produce as many parts at a time as possible. Spreading setup costs over a large number of parts results in a lower cost-per-piece.

Minimize secondary processes. Secondary processes like custom inserts, painting, etc. are necessary in some cases. In others, however, changes to design or materials can accomplish the same goals without the additional setup fees. The same is true for mechanisms. Many types of mechanisms, like living hinges for example, can be created in the molding process rather than after the fact.

Choose the right shop. Plastic injection molders tend to have specific areas of expertise. Finding one whose specialty meets your needs ensures that you won’t be paying more to have a molder modify its processes to accommodate your requirements.

Use the proper material to satisfy your demand ,not the highest.the material cost takes a very big part of injection molding expense,the proper plastic material decision would save you most.

The more money you can save on producing your plastic parts (without cutting corners, of course), the more competitively you can price your finished product. Use the tips above to give your company the edge.

Production procedure for injection molding companies

Production procedure for injection molding companies

injection molding companies

It has often been said that the backbone of any business concern is its sales department due to the fact that there can be no business without sales. It is true that the most efficient injection molding companies manufacturing department would be utterly useless without an outlet for the goods it produces, but conversely, the best sales organization in the world would soon prove to be worthless if it did not have a production department capable of competently handling the orders which it sent into the plant. Consequently, the success of any company depends not on sales alone, nor on manufacturing alone, but on a combination of the two, coordinating in their respective lines of endeavor.

Production procedure in a plastic molding concern naturally differs from one plant to another according to its size or capacity. The very small plant, for instance, would not find it necessary to institute forms and methods of procedure that become a vital part of the larger company, but basically the principles are the same to a greater or lesser degree. Whether it be a plant with merely five or six presses or an established concern replete with all the new types of mold equipment, the responsibility remains the same, namely to produce efficiently the goods ordered by the customers. Among the most important factors for which the production manager is held accountable are the following:

  1. Schedule the plastic raw material supply
  2. Keep in close touch with the preforming department
  3. Schedule the work in the molding department
  4. Place the dies in the correct plastic injection machines
  5. Keep the presses operating efficiently
  6. Coordinate the molding room work with that of the finishing department
  7. Supervise maintenance of all equipment
  8. Regulate wage rates and adjustments
  9. Insure rigid inspection of finished and semi-finished goods
  10. Provide accounting department with accurate labor records

In order to successfully manage the above phases of the molding division a great deal of the work must be distributed among subordinates, but the manager should be qualified to supervise any of the various components as listed. We shall now treat each one of these in greater detail and learn the necessary essentials to their continued functioning.

To fill orders, it is of course necessary to have the raw materials to furnish the press operator. Inasmuch as there are innumerable different molding powders it becomes a difficult task to keep stocked up in all of them. There are the usual variety of colors, characteristics, and degrees of hardness or softness that have to be considered and also the fact that time is often detrimental to the quality of the powder. The usual method of following raw material stock is by use of file cards with daily entries being made in the main office. Diminishing stock is watched closely and maxi-mums and minimums are established on all materials used.By this method the order department is able to ascertain the flow of each material from day to day, and purchase in sufficient time to prevent any possibility of running short. The records are kept in accordance with tickets made up in the powder room the day before. Much of the powder is converted into preforms as well as being used in the press room, but in order to keep the records accurately, material should not be reported as being used until it has actually been molded. Therefore preform stock is usually included as part of the raw material inventory. Definite numbers should be assigned to the various powders to facilitate day by day records of the stock of each kind actually on hand.