Based on the current user's aesthetic requirements for trash cans, plastic mold manufacturers generally form three-dimensional textures on the surface of garbage can moulds, while in the prior art, after the trash can is molded and clamped, the mold core cylinder is directly inserted into the cavity. The mold cavity for forming the trash can is generally composed of an upper mold with a cavity and a lower mold with a core cylinder, so that after the mold is closed to form a trash can, the texture of the trash can and the surface of the trash can is formed. Then, directly move the lower mold to open the garbage can mould.
This method will affect the aesthetics of the trash can after molding, because the three-dimensional texture on the surface of the trash can is easily damaged and embossed when the garbage can mould is demolded; and this method is because the surface of the trash can product that has just been formed is relatively fragile, when the formed trash can is ejected from the garbage can mould, the ejector pin is used to lift the trash can out of the mold. The thimble is generally driven by a cylinder, and the force on the top is relatively large, which is easy to damage the surface of the trash can product; based on the above shortcomings, the qualified rate of forming a trash can mold with a three-dimensional texture for forming a trash can product with a three-dimensional texture is low.
To this end, the garbage can mould technicians designed a garbage can mould, so that the trash can product with three-dimensional texture has a high pass rate after molding. The garbage can mould includes an upper mold and a lower mold. The upper mold sequentially includes an upper template and an upper module from top to bottom, and the upper template and the upper module are fixed to each other; the lower mold sequentially includes a lower template and a lower module from bottom to top. The lower modules are fixed to each other; the bottom surface of the upper module and the top surface of the lower module are respectively provided with square grooves with corresponding positions, and the middle of the inner bottom surface of the square groove of the lower module is provided with a mold core cylinder for forming the inner cavity of the trash can; Four forming sliding blocks are arranged between the bottom surface and the top surface of the lower module, and the four forming sliding blocks are joined together to form a mold cavity.
The top surface of the hot runner plate is fixed with the inner bottom surface of the square groove of the upper module. A mold cavity for forming a trash can is formed between the outer side of the mold core cylinder, the bottom surface of the hot runner plate and the inner side wall of the mold cavity. The hot runner plate, the upper template and the upper module are all provided with pouring holes. The holes are correspondingly spliced to form a pouring channel that communicates with the mold cavity; the four inner side walls of the two square grooves are provided with depressions, and the inner bottom surface of each depression is an inclined surface; the tops of the four forming sliders are respectively inserted into the four upper module In the depressions, the bottom ends are inserted into the four depressions of the lower module respectively; the top and bottom ends of the four forming sliders face the inclined plane, and the inclined plane is the same as the inclined plane, and the inclined plane is attached to the inclined plane; The inclined guide pillars are respectively fixed in the four recesses of the upper module, and the top surfaces of the four forming sliders are respectively provided with a plurality of inclined guide holes with the same inclination angle as the inclined guide pillars, and the inclined guide pillars are inserted into the inclined guide holes correspondingly; A positioning sleeve is fixed on the outer side corresponding to each forming slider.
The bottom end of the longitudinal portion of the hook is fixed to the lower module. There is a gap between the bottom surface of the transverse portion of the hook and the top surface of the positioning sleeve. The lower template, the lower module and the core column are all provided with corresponding air passages; the positioning strips are fixed obliquely in the middle of the left and right sides of the outer sides of the two oppositely arranged forming sliders, and the other two oppositely arranged outer sides of the forming sliders are on the left and right sides. The middle part is provided with a through groove corresponding to the positioning strip, and the positioning strip is inserted into the through groove; the inner side of the four forming sliders is engraved with a texture, which is used to form a three-dimensional texture on the surface of the garbage can mould. The sprue sleeve is correspondingly arranged on the top port of the runner, and the sprue sleeve is fixed on the upper template. It also includes a plurality of guide posts, the bottom end of each guide post is fixed on the top surface of the lower module, the bottom surface of the upper module is provided with a plurality of guide holes corresponding to the positions of each guide post, and the top of each guide post is inserted into the guide holes middle.
In the above garbage can mould, when demoulding, the formed trash can is separated from the core cylinder by the air cap, and then the forming slider is laterally separated from the product surface by four forming sliders, so as to ensure the outer surface of the trash can. And the three-dimensional texture of the inner surface is not damaged during demoulding, and the ejection demoulding method is simple and fast, which further improves the pass rate.