Formsprutning är att injicera smält plast i en sluten form med låg temperatur genom ett munstycke under högt tryck. Termoplaster och härdplaster kan gjutas genom formsprutning, och kan användas för att tillverka olika förpackningsbehållare av boxtyp, such as various turnover boxes and small boxes. For box type packaging containers, the following aspects shall be considered in the structural design:
1、 Wall thickness of container
1. Thickness: the wall thickness of the container is mainly determined by its use, plastic product type, strukturera, etc. For different thermoplastic engineering plastics, it is generally considered that the time should not be less than 0.6 kärnhårdheten 46-50HRC, and 2~4 mm is usually selected; For other thermosetting materials and plastics, due to their poor liquidity management, the thickness is larger, som sträcker sig från 1.6 till 2.5 ram for small pieces to 3.2 till 8 mm for large pieces, not exceeding 10 kärnhårdheten 46-50HRC.
2. Uniformity: The uniformity of wall thickness has a great impact on the quality of the container. If the thickness difference is too large, it will cause uneven shrinkage, deformation, cracks and other defects. Därför, equal thickness structure shall be adopted as far as possible in structural design.
3. Smooth transition: In some containers, some components must have different thicknesses due to structural requirements, such as the turning point of the container, which should be used for smooth transition to avoid sudden changes in cross section.
2、 Increase stiffness
1. Add stiffeners: stiffeners can enhance the strength and stiffness of the container. The basic requirements for the stiffeners are that the number of stiffeners should be large, the wall thickness should be thin, the height should be short, and there should be enough slope. The bottom of the stiffeners should be in an arc transition. The direction of the stiffeners should be consistent with the direction of material flow to improve the toughness of the plastic.
2. Improve the shape: most box containers are rectangular thin-walled pieces, which are easy to deform. Various ways should be taken to strengthen them, and the four side walls of the container should be slightly convex to improve the system stiffness; Banded enhancement on the sidewall; Edge enhancement at the edge of the container.
3. Reasonable support: The bottom area of the box container is large, but the whole box bottom should not be used as the support. Since the bottom of the box is slightly bent, the support should be changed into a line support or a point support. The convex side support (dvs. line support) should raise the foot support (dvs. point support), and the raised height is generally 0.3 ー 0.5 kärnhårdheten 46-50HRC.
4. Corner: corner is the intersection of two or three faces. No matter what the shape of the container is, the intersection of all surfaces must be rounded, which can greatly improve the rigidity of the container, improve the filling property of the plastic, disperse the stress and reduce the deformation.
3、 Demoulding angle
In order to facilitate the demoulding of molded parts, proper demoulding slope must be fully considered when designing pressure vessels. Too small demoulding angle makes demoulding difficult and damages the surface of the container; If it is too large, the calculation accuracy of main dimensions will be affected.
The demoulding angle varies with the shape of plastic part, plastic type, Tillverkningsprocess för plastsprutform, ytsträvhet, injection molding method, etc.
Om Huizhou Dj Moulding Co., Ltd
Dj Mould är en Kina mögel tillverkare av plastformar- formsprutning, gjutformar, formblåsning av plast, rotationsgjutning, medicinsk formsprutning av plast, två skott formsprutning av plast, insatsgjutning, övergjutning, formsprutning av metall, formsprutning av mikro, formsprutning av pulver, keramisk formsprutning, formsprutning av vätskor, husky formsprutning, hushållsform, gjutform, formverktyg, anpassade formar, porslinformar, snabb prototypverktyg, verktyg för plastprototyp, stanspressverktyg, munstycke och verktyg för mobildelar/ mobiltelefondelar, bildelar, Dammsugare, uppladdningsbara verktyg, telefoner, kopiatorer, datorer, multimediehögtalare, och många andra elektroniska produkter och hushållsapparater. Och även en tillverkare av plastprodukter, mögeltillverkare Kina- plastdelar, vattentank i plast, plastbollar, plastlådor, plastspänne, plastankare, plasthängare, plastsked, rörmontering av plast, tumla av plast, porslin av plast, plastmuggar, plastflaska, plastbricka, kosmetisk behållare av plast, plastfodral, matbehållare av plast, stolar i plast, plastlock, stängning av plastlock, plaströr, vattenledningar av plast, knoppar i plast, plaströr, verktygslådor i plast, plastställ och så vidare.
Kontakt:
Person: James Yuan
Företag: Huizhou Dj Moulding Company Limited
Lägg till: LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong-provinsen, Kina
Tel: 86-752-6682869
E-post: [email protected]
Webbplats: https://www.jasonmolding.com/custom-injection-molding/
