2results about How to "Improve injection quality" patented technology

This utility model provides a plastic toy injection molding device, belonging to the field of toy injection molding technology. It includes a set of uprights, with multiple stabilizing rods fixedly connected to the side walls of the uprights. A movable plate is slidably mounted on the stabilizing rods, and a movable sleeve is fixedly connected to the side wall of the movable plate. A first mold is fixedly connected to the movable plate. A stabilizing plate is fixedly connected to the side wall of the uprights, and multiple sliding plates are mounted on the top of the stabilizing plate. Multiple springs are fixedly connected to the ends of the sliding plates, and the ends of the springs are fixedly connected to the side walls of the uprights. A first rack is fixedly connected to the sliding plates. A rotating shaft is rotatably connected to the movable sleeve, and a gear is fixedly mounted on the rotating shaft. Multiple push rods are slidably connected inside the movable sleeve, and a second rack is fixedly connected to the bottom of each push rod. This utility model uses external compressed air to eject the injection molded part located in the mold groove, ensuring that the surface of the injection molded part is not mechanically damaged, which is beneficial to improving the injection molding quality.

The utility model discloses a kind of feeding devices of injection molding machine, including sequentially communicating hopper, conveying pipe and material cylinder, the pressure-maintaining cavity for storing material is in the material cylinder, the pusher rod is slidably connected in the pressure-maintaining cavity, the pusher rod is connected with the hydraulic cylinder for driving it to move, the oil circuit of the hydraulic cylinder is connected with the pressure relief valve for maintaining the pressure in the pressure-maintaining cavity, by setting the pressure-maintaining cavity for storing material in the material cylinder, after raw material is conveyed to the pressure-maintaining cavity by conveying pipe, when the pressure in the pressure-maintaining cavity is too large, the pressure in the pressure-maintaining cavity can be kept constant by pressure relief valve, so as to ensure that raw material can be fully foamed in the pressure-maintaining cavity with constant pressure, guarantee the uniformity of raw material foaming, so that subsequent injection into mold forming can well guarantee the quality of product, finally effectively improve foaming uniformity and injection quality.