CN-224224455-U - Novel injection molding machine mould opening and closing hydraulic circuit

Abstract

The utility model relates to the technical field of injection molding machines, and particularly discloses a novel injection molding machine mold opening and closing hydraulic loop, which comprises a mold opening and closing module, a power module and an energy storage module, wherein the mold opening and closing module comprises a mold opening and closing oil cylinder and a first reversing valve, the power module comprises a power system, the power system is communicated with an oil inlet of the first reversing valve and can be communicated with a rodless cavity or a rod cavity of the mold opening and closing oil cylinder through the first reversing valve, the energy storage module comprises an energy storage device, a liquid filling valve group and a liquid discharging valve group, an oil inlet of the energy storage device is communicated with the power system through the liquid filling valve group, an oil outlet of the energy storage device is communicated with the oil inlet of the first reversing valve through the liquid discharging valve group, when the injection molding machine is in a mold opening state, the power system of the injection molding machine can be used for supplying oil for a material storage part, and when the material storage and the mold opening are synchronously carried out, the power system can be saved, the cost of the injection molding machine can be greatly reduced, and the whole occupied space of the injection molding machine can be reduced.

Inventors

• YU JIYIN
• SHI JUN
• NI BING

Assignees

• 海天塑机集团有限公司

Dates

Publication Date

20260512

Application Date

20250425

Claims (10)

1. 1. Novel injection molding machine opens and shuts mould hydraulic circuit, its characterized in that includes: The mold opening and closing module comprises an mold opening and closing oil cylinder and a first reversing valve; The power module comprises a power system, wherein the power system is communicated with an oil inlet of the first reversing valve and can be communicated with a rodless cavity or a rod cavity of the mold opening and closing oil cylinder through the first reversing valve; The energy storage module comprises an energy storage device, a liquid filling valve group and a liquid discharging valve group, wherein an oil inlet of the energy storage device can be communicated with the power system through the liquid filling valve group, and an oil outlet of the energy storage device can be communicated with an oil inlet of the first reversing valve through the liquid discharging valve group; When the injection molding machine is in a mold opening state, an oil outlet of the energy accumulator is communicated with an oil inlet of the first reversing valve through the liquid discharge valve group, and can be communicated with a rod cavity of the mold opening and closing oil cylinder through the first reversing valve.
2. 2. The novel injection molding machine open-close die hydraulic circuit according to claim 1, wherein the liquid filling valve group comprises a second reversing valve, an oil inlet of the second reversing valve is communicated with a power system, a first electromagnet and a first oil outlet are arranged on the second reversing valve, and the first oil outlet is communicated with an oil inlet of the energy accumulator; when the first electromagnet is powered on, an oil inlet of the second reversing valve is communicated with the first oil outlet.
3. 3. The novel injection molding machine open-close die hydraulic circuit of claim 2, wherein the charging valve group further comprises a first one-way valve, the first one-way valve is located between the first oil outlet and the oil inlet of the energy accumulator, the oil inlet of the first one-way valve is communicated with the first oil outlet, and the oil outlet of the first one-way valve is communicated with the oil inlet of the energy accumulator.
4. 4. The novel injection molding machine mold opening and closing hydraulic circuit according to claim 2, wherein the power module further comprises a second one-way valve, an oil inlet of the second one-way valve is communicated with the power system, and an oil outlet of the second one-way valve is simultaneously communicated with an oil inlet of the first reversing valve and an oil inlet of the second reversing valve.
5. 5. The novel injection molding machine open-close die hydraulic circuit according to claim 2, wherein a second oil outlet is further arranged on the second reversing valve, the second oil outlet is communicated with the oil inlet of the first reversing valve, and when the first electromagnet is powered off, the oil inlet of the second reversing valve is communicated with the second oil outlet.
6. 6. The novel injection molding machine mold opening and closing hydraulic circuit according to claim 2, wherein the liquid filling valve group further comprises a pressure switch, and the pressure switch is fixed on one side of the energy accumulator and can control the first electromagnet to be powered off.
7. 7. The novel injection molding machine mold opening and closing hydraulic circuit according to claim 1, wherein the liquid discharge valve group comprises a liquid discharge cartridge valve and a liquid discharge control valve, an oil inlet of the liquid discharge cartridge valve is communicated with an oil outlet of the energy accumulator, an oil outlet of the liquid discharge cartridge valve is communicated with an oil inlet of the first reversing valve, and the liquid discharge control valve is used for controlling the liquid discharge cartridge valve to be opened or closed.
8. 8. The novel injection molding machine mold opening and closing hydraulic circuit according to claim 1 or 7, wherein the energy storage module further comprises a pressure relief valve and a safety relief valve, and both the pressure relief valve and an oil inlet of the safety relief valve are communicated with an oil outlet of the energy accumulator.
9. 9. The novel injection molding machine mold opening and closing hydraulic circuit according to claim 1, further comprising an oil storage module, wherein the oil storage module comprises an oil tank, the first reversing valve is set to be a proportional reversing valve, a first oil inlet, a first oil return port, a first variable oil port, a second variable oil port and a second electromagnet are arranged on the first reversing valve, the first oil inlet is simultaneously communicated with the power system and the oil outlet of the liquid discharge valve group, the first variable oil port is communicated with a rodless cavity of the mold opening and closing oil cylinder, the second variable oil port is communicated with a rod cavity of the mold opening and closing oil cylinder, and the first oil return port is communicated with the oil tank; When the second electromagnet is powered off, the first oil inlet is communicated with the first variable oil port, the second variable oil port is communicated with the first oil return port, and when the second electromagnet is powered on, the first oil inlet is communicated with the second variable oil port, and the first variable oil port is communicated with the first oil return port.
10. 10. The novel injection molding machine mold opening and closing hydraulic circuit according to claim 9, wherein the mold opening and closing module further comprises a safety cartridge valve and a pilot control valve, an oil inlet of the safety cartridge valve is communicated with the first variable oil port, an oil outlet of the safety cartridge valve is communicated with a rodless cavity of the mold opening and closing cylinder, and the pilot control valve is used for controlling the safety cartridge valve to be opened or closed.

Description

Novel injection molding machine mould opening and closing hydraulic circuit Technical Field The utility model relates to the technical field of injection molding machines, in particular to a novel hydraulic loop for opening and closing a mold of an injection molding machine. Background Along with the rapid development of the injection molding industry, the market has set higher requirements on the working efficiency and the production efficiency of an injection molding machine, and in order to realize efficient production and shorten the molding cycle, the injection molding machine needs to integrate multiple automatic functions, wherein the linkage control of storage and mold opening actions becomes one of key technologies, and the current main stream technical scheme generally adopts two independent hydraulic power systems to respectively drive the storage and mold opening processes, wherein one system is specially used for compressing and conveying materials in the storage stage, and the other system is responsible for separating molds in the mold opening stage. While this design is capable of achieving the basic functional requirements, the following significant drawbacks remain: 1. The equipment cost is high, two independent power systems are required to be provided with double hydraulic elements (such as pumps, valves, pipelines and the like), so that the hardware purchase and maintenance cost is increased in multiple, and particularly in large injection molding equipment, the economic burden caused by repeated investment is more remarkable; 2. The space utilization rate is low, the superposition arrangement of a plurality of sets of power systems greatly increases the volume of the whole machine, not only occupies more factory building area, but also limits the flexibility of the modular design of equipment, and for space-sensitive application scenes (such as compact production lines), the defect directly restricts the applicability of the equipment; 3. The energy efficiency is insufficient, the independently operated double systems are easy to cause power redundancy, and particularly under the low-load working condition, part of hydraulic elements can be in an idle running state, so that energy waste is caused, which is contrary to the current development trend of energy conservation and emission reduction in the industrial field. Disclosure of Invention The utility model is made in consideration of the problems, and the utility model aims to provide a novel hydraulic loop for opening and closing the mold of the injection molding machine, wherein an energy accumulator can be used for replacing a power system to provide hydraulic oil for opening the mold of the injection molding machine, so that the power system can be saved, the cost is lower, and the space occupation rate is small. In order to achieve the above object, the present utility model provides a novel hydraulic circuit for opening and closing a mold of an injection molding machine, comprising: The mold opening and closing module comprises an mold opening and closing oil cylinder and a first reversing valve; The power module comprises a power system, wherein the power system is communicated with an oil inlet of the first reversing valve and can be communicated with a rodless cavity or a rod cavity of the mold opening and closing oil cylinder through the first reversing valve; The energy storage module comprises an energy storage device, a liquid filling valve group and a liquid discharging valve group, wherein an oil inlet of the energy storage device can be communicated with the power system through the liquid filling valve group, and an oil outlet of the energy storage device can be communicated with an oil inlet of the first reversing valve through the liquid discharging valve group; When the injection molding machine is in a mold opening state, an oil outlet of the energy accumulator is communicated with an oil inlet of the first reversing valve through the liquid discharge valve group, and can be communicated with a rod cavity of the mold opening and closing oil cylinder through the first reversing valve. According to the novel injection molding machine mold opening and closing hydraulic circuit, the liquid filling valve group comprises a second reversing valve, an oil inlet of the second reversing valve is communicated with the power system, a first electromagnet and a first oil outlet are arranged on the second reversing valve, and the first oil outlet is communicated with the oil inlet of the energy accumulator; when the first electromagnet is powered on, an oil inlet of the second reversing valve is communicated with the first oil outlet. According to the novel injection molding machine open-close die hydraulic circuit, the liquid filling valve group further comprises a first one-way valve, the first one-way valve is located between the first oil outlet and the oil inlet of the energy accumulator, the oil inlet of the first one-wa