An injection apparatus of the invention injects a molding material supplied from a material supply port, and includes a die, a material supply apparatus that extrudes the molding material that is thread-like or strip-like via the die, and a material guide apparatus that guides the molding material supplied via the die to the material supply port. The material discharge port of the material supply apparatus and the die protrude downward in the material supply apparatus, and a pressure inside the material guide apparatus is reduced by a pressure reducing apparatus from a pressure reducing port provided above the material discharge port of the material supply apparatus and the die.

An injection molding machine includes: a plunger provided inside a barrel and capable of moving forward and backward in an axial direction thereof and rotating about an axis thereof; a feed hole for feeding a molding material in liquid form into a front of the plunger; a packing provided on a backward side of the feed hole to prevent the molding material fed through the feed hole from flowing backward along the plunger; and a controller for controlling a retracting movement of the plunger based on pressure of the molding material fed from the feed hole to thereby perform metering. In this configuration, at least part of the feed hole is covered by a side surface of the plunger at least from start to end of the retracting movement.

An injection molding machine that contributes to improving the quality of a workpiece is provided. An injection molding machine configured to causes torpedo pistons to be slid in one way to thereby plasticize a resin material supplied to a first space of a cylinder, and causes a molten resin to flow into a second space of the cylinder and causes the torpedo pistons to be slid in the other way to thereby inject the molten resin. The injection molding machine includes pressurizing pistons inserted into the torpedo pistons so that the pressurizing pistons can be slid in such a way that an amount of protrusion of the cylinder into the second space of the cylinder with respect to the torpedo pistons is changed, and energizing means for energizing the pressurizing pistons toward the second space of the cylinder.

The present disclosure provides an injection machine for a recycled plastic injection molding system. The injection machine comprises a supplying system configured to drive plastics from an entry end to downstream of receiving route, a heating system disposed to downstream of the supplying system and configured to melt plastics and drive plastics to the downstream of receiving route, and a buffer system disposed to downstream of the heating system and configured to be a receiving state and a supplying state. When the buffer system is in the receiving state, the buffer system is configured to receiving plastics from the heating system. When the buffer system is in the supplying state, the buffer system is configured to drive plastics to downstream of the receiving route.

An injection piston drives a screw. An injection hydraulic cylinder drives the injection piston and is partitioned into first and second chambers. A first oil discharge port is disposed in the injection hydraulic cylinder to be blocked by a piston part when the piston part of the injection piston advances to a pressure-holding switching position, and discharges hydraulic oil from the second chamber. A second oil discharge port is disposed in the injection hydraulic cylinder to be capable of discharging hydraulic oil from the second chamber regardless of the position of the injection piston. The injection piston has first and second members. The joint of the first and second members is disposed at a position separated from an end of the piston part on a side of the second chamber by a predetermined distance.

An injection molding machine capable of continuously injecting a molten resin is provided. An injection molding machine including: a plurality of cylinders; a plurality of pistons configured to extrude the molten resin inside the respective cylinders; a plurality of drive parts configured to drive the respective pistons; an injection part configured to inject the molten resin extruded from the plurality of cylinders; and a controller configured to control the plurality of drive parts. The controller controls the plurality of drive parts in such a way that a period during which the molten resin is injected from a first cylinder overlaps a period during which the molten resin is injected from a second cylinder and the molten resin is continuously injected from the plurality of cylinders.

An injection molding machine that contributes to improving the quality of a workpiece is provided. An injection molding machine configured to causes torpedo pistons to be slid in one way to thereby plasticize a resin material supplied to a first space of a cylinder, and causes a molten resin to flow into a second space of the cylinder and causes the torpedo pistons to be slid in the other way to thereby inject the molten resin. The injection molding machine includes pressurizing pistons inserted into the torpedo pistons so that the pressurizing pistons can be slid in such a way that an amount of protrusion of the cylinder into the second space of the cylinder with respect to the torpedo pistons is changed, and energizing means for energizing the pressurizing pistons toward the second space of the cylinder.

A method for manufacturing an optical lens includes pressing a fluid-state optical material by using a solid-state optical material to inject the fluid-state optical material molten from the solid-state optical material into a cavity. The solid-state optical material is molten only at the part adjacent to the cavity to form the fluid-state optical material, which facilitates transport of the optical material and minimizes residual waste. The pressing force applied to the solid-state optical material can be controlled to hence control the moving rate of the solid-state optical material, thereby precisely controlling the injection volume and injection rate of the fluid-state optical material.

An injection molding apparatus that employs a stationary plasticating screw relative to feed port, non-reciprocal helical plasticating screw housed within an inner barrel that is coupled to a plunger head assembly, drive housing, motor and injection cylinders that is housed within an outer barrel/pressure vessel that conveys, melts, homogenizes and pumps polymeric plastic material precisely and efficiently along One axis. The helical plasticating screw is fixed in relative position within the inner barrel so that the material feed opening of the inner barrel and helical plasticating screw are aligned to accept pellets, powder or liquid of polymetric substance. The inner barrel is fixed to a plunger head assembly on the distal end that is housed within a pressure vessel with close proximity between the outside diameter of the plunger head and the inside diameter of said pressure vessel that upon screw rotation transfers polymetric material through the center passageway of said plunger head opening a normally closed one-way shut-off mechanism into said pressure vessel precisely for future displacement of polymeric mass into a mold or other. The apparatus and process of feeding, melting and injecting Polymeric material all occurs on one axis.

A manufacturing apparatus includes an injection cylinder to which molten resin is supplied and which is configured to inject the molten resin, and an injection plunger disposed such that the injection plunger fits in the injection cylinder and moves in a first direction and a second direction opposite to the first direction. The injection cylinder includes a base body configured to contain the molten resin, and a sleeve configured to be detachably attached to the base body. The injection plunger is configured to be inserted into an inner portion of the base body through an opening portion formed in the sleeve and slide on the sleeve.