Step one: Analyze and digest the 2D and 3D drawings of the product, and set the draft of the PVC pipe fitting mold. The content includes the following aspects:
1. The geometric shape of the product. (Tee PVC pipe mold, swr pipe mold)
2. Product dimensions, tolerances and design benchmarks.
3. The technical requirements of the product (such as hardness, degree of plasticization, etc., sometimes the recycling of the product should be considered)
4. The name, shrinkage and color of the plastic used in the product. (For example, PVC pipe fitting mold and UPVC, CPVC pipe fitting mold use different mold materials in design)
5. The surface requirements of the product.
Step 2: Determine the model of the injection machine.
The specification of the injection machine is mainly based on the size of the plastic product and the production batch. When selecting an injection machine, the designer mainly considers its plasticization rate, injection volume, clamping force, effective area of the installation mold (distance between the injection machine tie rods), modulus, ejection form and ejection length.
If the customer has provided the model or specification of the injection machine used, the designer must check its parameters. For example, if the customer selects the internal distance of the tie rods of the injection molding machine to be 680*680mm, the size of the PVC pipe fitting mold cannot exceed this range, otherwise the replacement must be discussed with the customer.
Step three: the determination of the number of cavities of the PVC pipe fitting mold and the arrangement of the cavities The determination of the number of mold cavities is mainly based on the projected area of the pipe, the geometric shape (with or without side core pulling), product accuracy, batch size and economic benefits. The number of cavities is mainly determined based on the following factors:
1. Production batch of products (monthly batch or annual batch).
2. Whether the product has side core pulling and its treatment method.
3. The external dimensions of the mold and the effective area of the mold installed on the injection machine (or the distance between the draw rods of the injection machine).
4. Product weight and injection volume of injection machine.
5. The projected area and clamping force of the product.
6. Product accuracy.
7. Product color.
8. Economic benefits (production value of each set of molds).
After the number of cavities is determined, the arrangement of the cavities and the layout of the positions of the cavities are carried out. The arrangement of the cavity involves the size of the mold, the design of the gating system, the balance of the gating system, the design of the core pulling (slider) mechanism, the design of the insert core and the design of the hot runner system. The above problems are related to the selection of the parting surface and gate position, so in the specific design process, necessary adjustments to the PVC pipe fitting mold are required to achieve the most perfect design.
Through the above 3 steps, the cost of the PVC pipe fitting mold, the corresponding production plan, and the long-term economic benefits can be roughly calculated. For your selection of mold manufacturers and subsequent production planning, effective planning and timely adjustments can be made. Longxin Mould focuses on the design and manufacture of PVC pipe molds. If you are looking for a reliable supplier of pipe moulds, please contact us immediately. The professional sales team of Longxin Mould will contact you as soon as possible.
Post time: Aug-11-2021