77results about How to "Shorten injection molding cycle" patented technology

The invention relates to the technical field of an injection mould, and in particular relates to a rotating laminated type injection mould and an injection method using the same. The mould comprises a fixed mould main body and a movable mould main body, wherein the fixed mould main body comprises a fixed mould plate and a fixed mould chamber, the movable mould main body comprises a movable mould plate, an ejection mechanism and a movable mould chamber, the movable mould chamber is coupled with a rotating disk, one side of the mould is provided with a driving device which drives the rotating disk to rotate, the rotating disk is annularly provided with at least two embedding pieces which are set according to the thickness of a product, and the fixed mould chamber is provided with cavities which are matched with the embedding pieces. As the rotating disk rotates, the embedding pieces arranged at the rotating disk and the cavities arranged at the fixed mould chamber are closed, glued and cooled to be formed and opened, and the transparent product with the special thickness is divided to be subjected to alternated type or laminated type injection at least twice. The invention is reasonable in structure, the size of a mould blank is reduced, the indentation on the surface of the transparent product with the special thickness is controlled, the easily generated air bubble of an inner core is avoided, the injection period is shortened, and the production cost is reduced.

The invention discloses an implementing method of a three-layer three-position injection molding for a thick-wall part. The implementing method comprises the following steps: the injection molding sequence is as follows: firstly performing injection molding on a middle layer, then performing injection molding on the upper side of the periphery of the middle layer and finally performing injection molding on the lower side of the periphery of the middle layer; setting fixed molds and movable molds to realize injection molding; arranging the fixed molds uniformly in three positions, wherein the fixed molds are spaced at 120 degrees, and arranging the movable molds uniformly in three positions, wherein the movable molds are spaced at 120 degrees. By repeated rotation, the movable and fixed molds of a product stand alternately, so the injection molding period is shortened and the part precision is improved.

The invention relates to a microporous PC / ABS alloy and a preparation method thereof. The average micropore diameter of the microporous PC / ABS alloy is less than 1 μm, and the number of cells is greater than 109 / cm3; Reduced by more than 10%, the impact strength increased by about 2 times. The preparation method uses supercritical nitrogen as a foaming agent and injection molding to obtain a microporous PC / ABS alloy with small cell diameter, high density and uniform distribution; supercritical nitrogen foaming is combined with injection molding methods, supercritical nitrogen It can reduce the viscosity of the resin, reduce the clamping force in injection molding, reduce the burrs and internal stress of the product, prolong the life of the mold, and increase the dimensional stability of the product; it can also reduce the defects such as warpage and shrinkage marks of the product, and improve product quality. In addition, because the pressure-holding stage in traditional injection molding is not required, the injection molding cycle is shortened, the production efficiency is improved, and the cost is reduced.

The invention belongs to the field of a mold structure and especially relates to an injection mold for manufacturing a cantilever structure product. When the mold is assembled, a front inner mold and a rear inner mold are encircled and formed into an injection chamber for forming a main body of the cantilever structure product; and the rear inner mold and a rear mold sliding block are encircled and formed into an injection chamber for forming a reverse buckling cantilever. After injection molding, an injection molding machine is used for opening the mold, the rear mold sliding block slides and separates from the reverse buckling cantilever, the tail end of the reverse buckling cantilever is outward turned by a drawing mechanism, the reverse buckling cantilever is plastically deformed, and the rear mold sliding block is separated from the rear inner mold; the product packaging force is small, and a simplified jacking mechanism is adopted for pushing the main body away from the rear inner mold, so that the mold stripping is realized; and the rear mold sliding block is reset and the mold is assembled, so as to prepare for the next injection molding. The injection mold is suitable for manufacturing a large-scale cantilever structure product which can be separated from the mold without fully separating the product reverse buckle, and the separating structure configured for the reverse buckling cantilever of the present mold is not required, so that the mold structure is simplified, the rear mold has the space for arranging a more reasonable water channel, the injection molding period is reduced, the mold quality is high, and the production cost is low.