An injection molding system includes an extruding system, a discharging channel, a molding device including a first and second mold cavities, and a pressure regulating system regulates pressures inside the first and second mold cavities. An injection molding method includes providing a molding device having a first and second mold cavities, a first feeding port in communication with the first mold cavity, and a second feeding port in communication with the second mold cavity; sensing a first pressure in the first mold cavity, and injecting a first gas into the first mold cavity until the first mold cavity is sensed to have a first predetermined pressure; and sensing a second pressure in the second mold cavity, and injecting a second gas into the second mold cavity until the second mold cavity is sensed to have a second predetermined pressure, wherein the first and second predetermined pressures are different.

Disclosed herein is an injection molding method for making optical thermoplastic lenses using 3Dprinted functional wafers. The method employs a variable injection molding cavity temperature that is heated to at least wafer Tg10 C.

A control system and a control method of manufacturing injection molding products are provided. The control system includes an injection molding machine, an information input interface, a computing server and a data conversion device. At first, product information is inputted through the information input interface. The product information is transmitted to the computing server, and then the computing server determines injection molding parameters according to the product information. The injection molding parameters are transmitted to the information input interface. After data conversion through the data conversion device, the injection molding machine is controlled to manufacture the injection molding products according to the converted injection molding parameters.

An injection molding system includes an extruding system, a discharging channel, a molding device including a first and second mold cavities, and a pressure regulating system regulates pressures inside the first and second mold cavities. An injection molding method includes providing a molding device having a first and second mold cavities, a first feeding port in communication with the first mold cavity, and a second feeding port in communication with the second mold cavity; sensing a first pressure in the first mold cavity, and injecting a first gas into the first mold cavity until the first mold cavity is sensed to have a first predetermined pressure; and sensing a second pressure in the second mold cavity, and injecting a second gas into the second mold cavity until the second mold cavity is sensed to have a second predetermined pressure, wherein the first and second predetermined pressures are different.

A injection molding method involves measuring, using at least one external sensor, a change in a parameter of a mold side of a mold cavity, approximating a condition within the mold cavity based on the change in the parameter, such as pressure within the mold cavity or flow front position, and comparing the approximated condition to a trigger point,. If the approximated condition equals or exceeds the trigger point, activating a virtual cavity sensor having an optimal pre-defined pressure-time curve, and upon activation, the virtual cavity sensor tracks an approximated condition calculated from the change in parameter measurements measured by the at least one external sensor over time. In an embodiment, results of the approximated parameter tracking can be used in conjunction with an optimal pre-defined pressure-time curve.

A field joint mold assembly has a mold body for defining a mold cavity around the field joint section of a pipe. An injection port opens through the mold body such that curable insulation material can be imparted through the injection port into the mold cavity. A heating system is mounted on the mold body for uniformly heating the mold body to an elevated temperature to promote even elevated temperature distribution inside the mold cavity. To insulate a field joint, curable insulation material is injected into the mold cavity and cured. While injecting and/or curing, heat is conducted from a heating system to majority of a surface area of the mold body to uniformly heat the mold cavity to an elevated temperature.

An injection molding machine includes: a mold clamping device including: a movable platen having a movable mold and a fixed platen having a fixed mold; and a toggle mechanism that moves the movable platen such that a mold device opens and closes, and disposes the movable platen in a mold clamping position; an injection device that injects molding material into cavity space between the movable mold in the mold clamping position and the fixed mold; and a control device that controls the mold clamping and injection devices. A cleaning process is performed, while the movable platen is at a burr-forming position and farther away from the fixed mold than at the mold clamping position, and the injection device injects the molding material into the mold device to mold an article with burrs. A toggle factor at the burr-forming position is a magnification factor of 1 or greater.