An apparatus having a first portion including a first front wall, a first rear wall, and a bottom wall integrally coupled to the first front wall and the first rear wall, and pivotal pin structures integrally coupled to and extending from the first rear wall. The apparatus includes a second portion having a second front wall, a second rear wall, and a top wall integrally coupled to the second front wall and the second rear wall, and pin holders integrally coupled to and extending from the second rear wall and at an offset angle with reference to the top wall. The pivotal pin structure includes a base support connected to the first rear wall and a shaft connected to the base support, and the pin holder defines an opening sized and shaped to accept the shaft. The first and second portions are sized and shaped to be pivotally movable between open and closed configurations.

An apparatus having a first portion including a first front wall, a first rear wall, and a bottom wall integrally coupled to the first front wall and the first rear wall, and pivotal pin structures integrally coupled to and extending from the first rear wall. The apparatus includes a second portion having a second front wall, a second rear wall, and a top wall integrally coupled to the second front wall and the second rear wall, and pin holders integrally coupled to and extending from the second rear wall and at an offset angle with reference to the top wall. The pivotal pin structure includes a base support connected to the first rear wall and a shaft connected to the base support, and the pin holder defines an opening sized and shaped to accept the shaft. The first and second portions are sized and shaped to be pivotally movable between open and closed configurations.

The invention belongs to the technical field of integrated machining of lenses and provides an integrated injection-molding method for a lens and a lens formed by the integrated injection-molding method to overcome the defect of poor sealing performance of lenses in the prior art caused by separate assembly of the lenses during production. In the invention, a high-transparency polycarbonate material is purified to remove impurities and moisture; then, an integrated mold is debugged; a material plasticization and filling process, a temperature holding process and a cooling process are accurately controlled by means of an injection molding machine to realize integrated formation of a lens and a product body; and after being formed, the product body is processed, and performance is detected. In this way, the sealing performance of the lens is improved.

An injection unit comprises an injection cylinder, heaters that are attached to side surfaces of the injection cylinder along an axial direction of the injection cylinder, and heat-retaining components that cover at least a part of outer circumference surfaces of the heaters in the axial direction. The injection cylinder comprises supply sections to which an injection molding material is supplied, a compression section that compresses the injection molding material, and measurement sections that measure the amount of a compressed injection molding material. Heat retention for the heaters in the compression section is lower than heat retention for the heaters in the supply sections and heat retention for the heaters in the measurement sections.

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

Provided are an injection device control method, which is a control method for an injection device including a first cylinder and a second cylinder, and an injection molding system, in which an injection molding is performed with a set temperature of a heater that heats the second cylinder, a rotation speed of a screw in the second cylinder, and a cycle time as parameters. An estimated value (Q2) of energy input from the heater to a molding material and an estimated value (Q3) of energy input from the screw for shearing of the molding material are calculated, and a ratio between (Q2) and (Q3) is visualized and presented to an operator.

An injection molding machine heats an injection nozzle using, as a target temperature, a detected temperature of a synchronization zone, when a detected temperature of the injection nozzle is lower than a nozzle reference temperature. The injection molding machine heats the injection nozzle using a nozzle set temperature as a target temperature, when a detected temperature of the injection nozzle is higher than the nozzle reference temperature.