CN203019646U

CN203019646U - Plastic injection machine

Info

Publication number: CN203019646U
Application number: CN 201220737338
Authority: CN
Inventors: 鄢海峰; 韦浪舟; 海珉; 韦熊然
Original assignee: LIUZHOU OUKE PLASTIC MACHINERY COMPLETE CO Ltd
Current assignee: LIUZHOU OUKE PLASTIC MACHINERY COMPLETE CO Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-06-26
Anticipated expiration: 2022-12-28

Abstract

The utility model discloses a plastic injection machine, which relates to the technical field of plastic machinery manufacture. The plastic injection machine comprises a feeding module, an ejector pin module, an injection seat module, a die adjustment module, an injection module, a die opening and closing module and a power output module, wherein the power output module is formed by a servo motor, a metering pump, a servo driver, a pressure sensor and a rotary coder; one end of the pressure sensor is connected with the output end of the metering pump, and the other end of the pressure sensor is connected with the input end of the servo driver; one end of the rotary coder is connected with one end of the servo motor, and the other end of the rotary coder is connected with the input end of the servo driver; and the output end of the servo driver is connected with the control end of the servo motor. According to the plastic injection machine, the rotating speed of the servo motor can be adjusted according to the pressure and flow rate required by loading of a hydraulic system, and a pipeline of the hydraulic system can be controlled at a low temperature, thereby achieving the aims of saving energy and reducing consumption.

Description

Injection molding machine of plastic

Technical field

The utility model relates to plastics machinery manufacturing technology field, the injection molding machine of plastic of especially being controlled by a kind of servomotor.

Background technology

mostly the power output of injection molding machine of plastic hydraulic control system is to adopt threephase asynchronous machine to add the mode of constant displacement pump or threephase asynchronous machine addition of variable plunger displacement pump at present, front a kind of mode, each action in injection cycle, as the folding mould, eject, feed in raw material, injection and pressurize, even holding state is all different to the requirement of flow, and oil pump motor provides constant flow with constant rotating speed, and unnecessary hydraulic oil refluxes by overflow valve, this process is called the high pressure throttling, the energy loss that is caused by the high pressure throttling according to statistics is up to 36% ~ 68%, and energy consumption is high, and is uneconomical, the front a kind of mode of rear a kind of mode makes moderate progress, variable pump is under the threephase asynchronous machine constant revolution, can provide from zero flow to maximum, the power output of Hydraulic System for Injection Moulding Machine can be mated substantially with the injection machine loading demand, the power output of variable pump is that the variation with load changes, lose without high pressure throttling overflow energy, especially in injection, preformed, the power savings of refrigerating work procedure is higher, on average can reach 30 ~ 50% power savings, to injection dwell time long thick body or massive article, the superiority of economize on electricity is more obvious, reach certain energy-saving effect.But this power way of output is Shortcomings still, be exactly when each moves in execution when injection machine, threephase asynchronous machine is in running order all the time, that is when I guess load is very little, although the required flow of hydraulic system very little (as pressurize), but threephase asynchronous machine still needs not stall moving, has consumed in vain a large amount of electric energy.

Figure 1 shows that the injection molding machine of plastic hydraulic system principle figure of prior art, comprise folding mould module, mode transfer module, eject module, injection seat module, injection module, reinforced module and power take-off module, wherein power take-off module is made of threephase asynchronous machine and variable pump.

The utility model content

The purpose of this utility model is to provide a kind of injection molding machine of plastic, this injection molding machine of plastic can solve when the required pressure of injection molding machine of plastic load and flow hour, drive motors still consumes the problem of a large amount of electric energy.

In order to address the above problem, the technical solution adopted in the utility model is:

A kind of injection molding machine of plastic, comprise folding mould module, mode transfer module, eject module, injection seat module, injection module, reinforced module and power take-off module, described power take-off module is made of servomotor, constant displacement pump, servo-driver, pressure sensor and rotary encoder; The described quantitative delivery side of pump of described pressure sensor one termination, the input of the described servo-driver of another termination, one end of the described rotary encoder one described servomotor of termination, the input of the described servo-driver of another termination, the control end of the described servomotor of output termination of described servo-driver.

Owing to having adopted technique scheme, the utility model compared with prior art has following beneficial effect:

1, during or holding state less when the injection molding machine of plastic load, the servomotor rotating speed is very little even to stop operating, and saves energy resource consumption;

2, adopt injection molding machine of plastic oil temperature in hydraulic system of the present utility model to remain at lower temperature, the various Hydraulic Elements in hydraulic system are longer service life;

3, because temperature in plastic injection-moulded machine hydraulic system is lower, therefore can save a large amount of cooling waters;

When 4, injection molding machine of plastic is worked, noise is lower, and the working environment peace and quiet are comfortable;

5, the pressure in each course of action, flow are implemented closed-loop control to injection molding machine of plastic, improve the control accuracy of machine.

Description of drawings

Fig. 1 is the prior art hydraulic schematic diagram.

Fig. 2 is the utility model hydraulic schematic diagram.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing embodiment:

Figure 1 shows that the injection molding machine of plastic hydraulic system principle figure of prior art, comprise folding mould module 1, mode transfer module 2, eject module 3, injection seat module 4, injection module 5, reinforced module 6 and power take-off module 7, wherein power take-off module 7 is made of threephase asynchronous machine 9 and variable pump 8.

Figure 2 shows that injection molding machine of plastic hydraulic system principle figure of the present utility model, a kind of injection molding machine of plastic, comprise folding mould module 1, mode transfer module 2, eject module 3, injection seat module 4, injection module 5, reinforced module 6 and power take-off module 7, wherein power take-off module 15 is made of servomotor 11, constant displacement pump 10, servo-driver 13, pressure sensor 12 and rotary encoder 14; The output of one termination constant displacement pump 10 of pressure sensor 12, the input of another termination servo-driver 13, one end of rotary encoder 14 1 servo motor terminations 11, the input of another termination servo-driver 13, the control end of the output servo motor termination 11 of servo-driver 13.

when servo-driver 13 receives the pressure that the injection molding machine of plastic computer controller is sent, after flow signal, can send instruction to servomotor 11 according to the size of signal, control the output torque of servomotor 11 and the size of output speed, wherein pressure signal is directly proportional to moment of torsion, flow signal is directly proportional to rotating speed, be that injection molding machine of plastic needs great load, servomotor 11 just provides great rotating speed and flow, when injection molding machine of plastic proceeds to pressurize or cooling action, even there is no rotating speed because required rotating speed is very low, this moment, servomotor 11 almost was halted state, energy consumption is very low, thereby reach energy-saving effect.

Claims

1. injection molding machine of plastic, comprise folding mould module, mode transfer module, eject module, injection seat module, injection module, reinforced module and power take-off module, it is characterized in that: described power take-off module is made of servomotor, constant displacement pump, servo-driver, pressure sensor and rotary encoder; The described quantitative delivery side of pump of described pressure sensor one termination, the input of the described servo-driver of another termination, one end of the described rotary encoder one described servomotor of termination, the input of the described servo-driver of another termination, the control end of the described servomotor of output termination of described servo-driver.