CN115789481A - Lubricating system, injection molding machine and control method of lubricating system - Google Patents

Abstract

The invention provides a lubricating system, an injection molding machine and a control method for the lubricating system. The lubricating system includes: a grease pump; a plurality of lubricating oil circuits connected in parallel to the grease pump, and at least part of the lubricating oil circuits are provided with switch control valves and a first distributor , the inlet of the on-off control valve communicates with the grease pump, the outlet of the on-off control valve communicates with the inlet of the first distributor, and the outlet of the first distributor is configured to be set opposite to the lubricating point; the controller, the controller is connected to the grease pump and the switch The control valves are connected by communication, and the controller is configured to control the start and stop of the grease pump according to the lubrication period of each lubricating oil circuit and control the switch control valve to conduct or block the corresponding lubricating oil circuit. The present invention realizes oil supply to a plurality of lubricating oil circuits through a grease pump, and the controller controls the start and stop of the grease pump according to the lubrication period of each lubricating oil circuit and controls the switch control valve to conduct or block the corresponding lubricating oil circuit, Realize precise control of each lubricating oil circuit.

Description

Lubrication system, injection molding machine and control method for lubrication system

technical field

The invention relates to the field of injection molding machines, in particular to a lubricating system, an injection molding machine and a control method for the lubricating system.

Background technique

The traditional injection molding machine lubrication system usually uses one set of electric grease pumps and multiple sets of distributors to lubricate many different mechanical structural parts of the machine. Since there is only one grease pump, the lubrication cycle is the same. If some mechanical parts require If the lubrication cycle has special requirements, it can only be controlled separately by adding another lubrication pump and pipeline, which takes up extra space, increases costs, wastes manpower and material resources, and the performance consistency after debugging will vary.

Contents of the invention

The invention proposes a lubricating system, an injection molding machine and a control method of the lubricating system, aiming at solving the problem that the period of the lubricating system of the existing injection molding machine can not be adjusted.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A technical solution of the present invention proposes a lubrication system for injection molding machines, including:

a grease pump;

A plurality of lubricating oil circuits are connected in parallel to the grease pump, at least part of the lubricating oil circuits are provided with a switch control valve and a first distributor, the inlet of the switch control valve communicates with the grease pump, and the switch control valve The outlet of the first distributor communicates with the inlet of the first distributor, and the outlet of the first distributor is configured to be opposite to the position of the lubrication point;

a controller, the controller is connected in communication with the grease pump and the switch control valve, and the controller is configured to control the start and stop of the grease pump and control the The switch control valve conducts or blocks the corresponding lubricating oil passage.

In a technical solution of the present invention, the multiple lubricating oil circuits include at least one regular lubrication cycle oil circuit and at least one special lubrication cycle oil circuit, and the lubrication cycle of the special lubrication cycle oil circuit is different from the regular lubrication cycle The lubrication cycle of the oil circuit, where,

The special lubrication period oil circuit is provided with the switch control valve and the first distributor;

The regular lubrication cycle oil circuit is provided with a second distributor, the inlet of the second distributor communicates with the grease pump, and the outlet of the second distributor is arranged opposite to the position of the lubrication point.

In a technical solution of the present invention, at least one of the special lubricating cycle oil passages is provided with a plurality of the first distributors with the same lubricating cycle.

In a technical solution of the present invention, a flow divider is also provided on the special lubrication cycle oil circuit provided with a plurality of the first distributors, and the inlet of the flow divider is connected with the outlet of the switch control valve, The outlet of the splitter communicates with a plurality of the first distributors in a one-to-one correspondence.

In a technical solution of the present invention, a pressure switch is connected in series on the longest oil circuit of the regular lubrication period, and the pressure switch can be used to monitor the pressure value of the lubrication system.

In a technical solution of the present invention, the outlet of the pressure switch communicates with one or more of the second distributors.

In a technical solution of the present invention, the lubrication system also includes:

A temperature sensor configured to monitor the temperature of the workpiece corresponding to each of the lubrication points;

a pressure sensor configured to monitor the pressure of each of the first distributors and each of the second distributors;

A processor, the processor is communicatively connected with the controller, the temperature sensor and the pressure sensor, and the processor is configured to obtain the production cycle, the number of times each lubrication point corresponds to the workpiece, and each lubrication point corresponds to the workpiece The temperature of the lubricating oil circuit can be determined according to one or more of the production cycle, the number of times each lubrication point corresponds to the workpiece, and the temperature of the workpiece corresponding to each lubrication point, and the determined lubrication cycle is fed back to the the controller.

In a technical solution of the present invention, the on-off control valve includes an electromagnetic reversing valve, and the electromagnetic reversing valve has A port, B port, P port and T port, wherein the P port is used as an inlet to communicate with the The grease pump is connected, the A port is used as an outlet to communicate with the first distributor, the B port and the T port are provided with plugs, and the controller is configured to control the spool of the electromagnetic reversing valve Move between the A port and the B port.

The present invention also provides an injection molding machine, comprising:

Multiple lubrication points;

According to the lubricating system described in any one of the preceding technical solutions, the outlet of the first distributor of the lubricating system is arranged opposite to the lubricating point.

The present invention also provides a method for controlling a lubricating system, which is suitable for the lubricating system described in any one of the aforementioned technical solutions, including the following steps:

Obtain the lubrication cycle of each lubricating oil circuit;

Control the start and stop of the grease pump according to the acquired lubrication cycle and control the on-off control valve to conduct or block the corresponding lubricating oil circuit.

The lubricating system provided by the present invention realizes oil supply to multiple lubricating oil circuits through a grease pump, which saves the number of grease pumps, reduces system cost and control difficulty, and at least part of the multiple lubricating oil circuits lubricates The oil circuit is provided with an on-off control valve and a first distributor. The on-off control valve can conduct or block the lubricating oil circuit where it is located. In this way, when the on-off control valve conducts the lubricating oil circuit where it is located, the lubricating oil circuit can pass through the lubricating oil circuit. , when the switch control valve blocks the lubricating oil circuit where it is located, so that the lubricating oil circuit does not pass through the lubricating oil, the controller controls the start and stop of the grease pump according to the lubrication cycle of each lubricating oil circuit and controls the switch control valve to conduct or block the corresponding The lubricating oil circuit can be lubricated at different lubrication cycles for different lubrication points, so as to realize the precise control of each lubricating oil circuit and avoid the situation of excessive lubrication or insufficient lubrication.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a lubrication system according to an embodiment of the present invention.

The reference signs are explained as follows:

100. Electric grease; 210. The first three-way valve; 220. The second three-way valve; 230. The third three-way valve; 240. The fourth three-way valve; 250. The fifth three-way valve; 260. The sixth three-way valve Through valve; 300, pressure gauge; 400, electromagnetic reversing valve; 510, split distributor; 520, distributor on the second board; 530, distributor on the second injection board; 540, distributor on the injection head board; 550, the first board Distributor on the first tailgate; 560, distributor on the second tailgate; 570, distributor on the front side of the tailgate; 580, distributor on the rear side of the tailgate; 600, pressure switch.

Detailed ways

While the invention may readily be embodied in different forms, only some of these are shown in the drawings and will be described in detail in this specification, with the understanding that the specification should be considered as the These are exemplary illustrations of the principles of the invention and are not intended to limit the invention to what is described herein.

Thus, a feature indicated in this specification will be used to describe one of the features of an embodiment of the present invention, rather than implying that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes a number of features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Thus, the illustrated combinations are not intended to be limiting unless otherwise stated.

In the embodiments shown in the drawings, directional designations (such as up, down, inside, outside, left, right, front, back, etc.) are used to explain the structure and operation of the various components of the invention are not absolute but rather relatively. These descriptions are applicable when the components are in the positions shown in the drawings. If the description of the location of these components is changed, the indications of these directions are changed accordingly.

Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; Fully conveyed to those skilled in the art. The drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted.

The preferred implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings of this specification.

As shown in FIG. 1 , an embodiment of an aspect of the present invention provides a lubricating system for an injection molding machine. The lubricating system includes a grease pump, multiple lubricating oil circuits and a controller.

A plurality of lubricating oil circuits are connected in parallel to the grease pump, at least part of the lubricating oil circuits are provided with on-off control valves and the first distributor, the inlet of the on-off control valves communicates with the grease pump, the outlet of the on-off control valves communicates with the inlet of the first distributor, The outlet of the first distributor is arranged opposite to the location of the lubrication point.

The controller communicates with the grease pump and the switch control valve. The controller is configured to control the start and stop of the grease pump according to the lubrication cycle of each lubricating oil 5-way and control the switch control valve to conduct or block the corresponding lubricating oil circuit.

The lubricating system provided by the present invention realizes oil supply to multiple lubricating oil circuits through a grease pump, which saves the number of grease pumps, reduces system cost and control difficulty, and at least part of the multiple lubricating oil circuits lubricates The oil circuit is provided with an on-off control valve and a first distributor, and the on-off control valve can conduct or

Block the lubricating oil circuit where it is located, so that when the switch control valve conducts the lubricating oil circuit where it is located, the lubricating oil circuit where it is located can pass through the lubricating oil.

Without lubricating oil, the controller controls the start and stop of the grease pump according to the lubrication cycle of each lubricating oil circuit and controls the switch control valve to conduct or block the corresponding lubricating oil circuit. It can lubricate with different lubrication cycles for different lubrication points. Accurate control of each lubricating oil circuit is realized, avoiding the situation of excessive lubrication or insufficient lubrication.

In some embodiments, the multiple lubricating oil circuits include at least one conventional lubrication cycle oil circuit and at least one special lubrication cycle oil circuit, the lubrication cycle of the special lubrication cycle oil circuit is different from the lubrication cycle of the conventional lubrication cycle oil circuit, In more detail, the lubricating oil circuit corresponding to the lubricating point with the relatively frequent lubrication cycle such as the most frequent work and the relatively fast temperature rise can be used as the regular lubrication cycle oil circuit, and the other lubricating points with relatively infrequent lubrication cycle can be used as Special lubrication cycle oil circuit.

Among them, the special lubrication period oil circuit is provided with a switch control valve and the first distributor, and the regular lubrication period 0 oil circuit is provided with a second distributor, the inlet of the second distributor communicates with the grease pump, and the outlet of the second distributor

The configuration is set relative to the position of the lubrication point.

In this way, the lubrication system is based on the lubrication cycle of the conventional lubrication cycle oil circuit, and the controller only needs to control the on-off of the special lubrication cycle oil circuit, which saves the control steps of the control valve for the on-off of the conventional lubrication cycle oil circuit. Reduce the control complexity of the controller and improve the control precision of the controller.

5 In some embodiments, at least one special lubricating cycle oil circuit is provided with multiple first distributors with the same lubricating cycle. In this way, the first distributor with the same lubrication cycle in the special lubrication cycle is set on the same special lubrication cycle oil circuit, which is uniformly controlled by the switch controller of the special lubrication cycle oil circuit, which further reduces the control complexity of the controller and improves the controller. control precision.

In some embodiments, a flow divider is provided on the special lubrication period oil circuit provided with multiple first distributors, for example, the flow divider is a three-way valve. The inlet of the flow divider communicates with the outlet of the on-off control valve, and the outlet of the flow divider communicates with a plurality of first distributors in one-to-one correspondence. In this way, the parallel arrangement of multiple first distributors with the same lubrication cycle is realized through the flow divider, which further ensures the consistency of the oil pressure of each first distributor, so that the oil intake of each first distributor is guaranteed, and each first distributor The oil inlet of the distributor is more accurate.

Of course, in other embodiments, the first distributors with the same lubrication cycle in the special lubrication cycle can also be set to be connected in series, which saves the setting of the flow divider, which is beneficial to save costs and facilitate the assembly of the oil circuit.

In some embodiments, a pressure switch 600 is connected in series on the oil circuit with the longest regular lubrication period. The pressure switch 600 can be used to monitor the pressure value of the lubrication system. It is more likely to find pressure loss and flow interruption. A pressure switch 600 is installed on the oil circuit with the longest regular lubrication cycle to monitor the pressure loss and flow interruption of the lubrication system. The monitoring results of the switch 600 determine the situation of pressure loss and flow interruption of the lubrication system, and adjust in time.

Furthermore, the outlet of the pressure switch 600 is connected to one or more second distributors. For example, when the outlet of the pressure switch 600 is connected to a plurality of second distributors, the plurality of second distributors can be connected in series in sequence, or The outlet of the pressure switch 600 can be set to communicate with the shunt, and multiple second distributors are connected in parallel to the shunt. In this way, a lubricating point is also set after the pressure switch 600 to prevent grease deposition and aging.

In some embodiments, the lubrication system also includes a temperature sensor, a pressure sensor, and a processor. The temperature sensor is configured to monitor the temperature of the workpiece corresponding to each lubrication point, the pressure sensor is configured to monitor the pressure of each first distributor and each second distributor, the processor is connected to the controller, the temperature sensor and the pressure sensor in communication, and the processor It is configured to be able to obtain the production cycle, the working times of each lubrication point corresponding to the workpiece, and the temperature of each lubrication point corresponding to the workpiece, and according to one or Multiple lubricating cycles are determined for corresponding lubricating oil circuits, and the determined lubricating cycles are fed back to the controller.

In this way, the lubrication system can determine the lubrication cycle of the corresponding lubricating oil circuit according to one or more of the production cycle of each lubricating oil circuit, the number of operations of each lubrication point corresponding to the workpiece, and the temperature of each lubrication point corresponding to the workpiece, and the accuracy of the determination of the lubrication cycle Higher, to achieve precise control of each lubricating oil circuit, to avoid the situation of excessive lubrication or insufficient lubrication.

In some embodiments, the switch control valve includes an electromagnetic reversing valve 400, and the electromagnetic reversing valve 400 has A port, B port, P port and T port, wherein, the P port is used as the inlet to communicate with the grease pump, and the A port is used as the outlet It communicates with the first distributor, the B port and the T port are provided with plugs, and the controller is configured to control the spool of the electromagnetic reversing valve 400 to move between the A port and the B port. In this way, when the control core of the controller valve moves to the first position where port A is connected, the connection between port P and port A is connected, and the lubricating oil circuit where the electromagnetic reversing valve 400 is located is connected, and the lubricating oil can pass through port P. and port A are supplied to the corresponding distributor, when the control core of the controller valve moves to the second position of blocking port A, the space between port P and port A is blocked, and the lubricating oil passage where the electromagnetic reversing valve 400 is located is blocked If it is blocked, the lubricating oil will not be supplied to the corresponding distributor, realizing the cut-off of the lubricating oil circuit, and the control is simpler and more accurate.

In some embodiments, the distributor is a quantitative distributor, and further, the distributor is a progressive quantitative distributor, so that the accuracy of the oil output of each outlet of the distributor is higher, and the lubrication is more precise.

Furthermore, a corresponding quantitative meter is set at each outlet of the progressive quantitative distributor to detect the oil output of each outlet of the progressive quantitative distributor, further improving the precise control of the oil output.

The present invention also provides an injection molding machine, comprising a plurality of lubricating points and the lubricating system according to any one of the foregoing embodiments, and the outlet of the first distributor of the lubricating system is set opposite to the lubricating points.

The injection molding machine provided by the present invention realizes oil supply to multiple lubricating oil circuits through a grease pump, which saves the number of grease pumps, reduces system cost and control difficulty, and at least partially lubricates the multiple lubricating oil circuits The oil circuit is provided with an on-off control valve and a first distributor. The on-off control valve can conduct or block the lubricating oil circuit where it is located. In this way, when the on-off control valve conducts the lubricating oil circuit where it is located, the lubricating oil circuit can pass through the lubricating oil circuit. , when the switch control valve blocks the lubricating oil circuit where it is located, so that the lubricating oil circuit does not pass through the lubricating oil, the controller controls the start and stop of the grease pump according to the lubrication cycle of each lubricating oil circuit and controls the switch control valve to conduct or block the corresponding The lubricating oil circuit can be lubricated at different lubrication cycles for different lubrication points, so as to realize the precise control of each lubricating oil circuit and avoid the situation of excessive lubrication or insufficient lubrication.

a specific example

The multiple lubrication points of the injection molding machine include at least the second plate, the second injection plate, the injection head plate, the tail plate, the front side of the tail plate, and the rear side of the tail plate.

The lubrication system includes electric grease 100, first three-way valve 210, second three-way valve 220, third three-way valve 230, fourth three-way valve 240, fifth three-way valve 250, sixth three-way valve 260, pressure Meter 300, electromagnetic reversing valve 400, shunt distributor 510, distributor 520 on the second board, distributor 530 on the second injection board, distributor 540 on the injection head board, distributor 550 on the first tail board, and second tail board Distributor 560 on the board, distributor 570 at the front side of the tailgate, distributor 580 at the rear side of the tailgate, and a pressure switch 600.

Wherein, the outlet of the electric grease 100 pump is connected with the inlet of the first three-way valve 210, and an outlet of the first three-way valve 210 is connected with the pressure gauge 300, and the pressure gauge 300 is used to detect the pressure of the electric grease 100 pump, the first three The other outlet of the through valve 210 communicates with the inlet of the split distributor 510 .

The split distributor 510 has an inlet and three outlets, wherein one outlet of the split distributor 510 communicates with the inlet of the second three-way valve 220, and one outlet of the second three-way valve 220 communicates with the inlet of the distributor 520 on the second board , the distributor 520 on the second board has ten outlets, and the ten outlets correspond to ten lubrication points on the second board of the injection molding machine;

The other outlet of the second three-way valve 220 communicates with the inlet of the pressure switch 600, and the outlet of the pressure switch 600 communicates with the inlet of the distributor 530 on the second injection board. The distributor 530 on the second injection board has six outlets and six outlets. Corresponding to the six lubrication points on the second injection plate of the injection molding machine;

The other outlet of the diverter distributor 510 communicates with the inlet of the distributor 580 on the rear side of the tailgate, and the distributor 580 on the rear side of the tailgate has five outlets, four of which correspond to the four lubrication points on the rear side of the tailgate of the injection molding machine , the other outlet communicates with the inlet of the distributor 550 on the first tailgate, and the distributor 550 on the first tailgate has nine outlets, eight of which correspond to the eight outlets on the first tailgate of the injection molding machine. Lubrication point, the other outlet communicates with the inlet of the distributor 570 on the front side of the tailgate, the distributor 570 on the front side of the tailgate has four outlets, corresponding to the four lubrication points on the front side of the tailgate of the injection molding machine;

Above, the second three-way valve 220, the distributor 520 on the second board, the pressure switch 600, the distributor 530 on the second board of injection, the distributor 550 on the first tail board, the distributor 570 on the front side of the tail board, the distribution on the rear side of the tail board The distributor 580 is formed as a plurality of regular lubricating periodic oil circuits connected in parallel, the distributor 520 on the second board, the distributor 530 on the second injection board, the distributor 550 on the first tail board, the front side distributor 570 of the tail board, the tail board The rear side distributor 580 is formed as the second distributor of the conventional lubrication cycle oil circuit mentioned above. The respective lubrication cycles of multiple conventional lubrication cycle oil circuits are consistent, but the oil output of each lubrication point can have its own first Two dispenser quantitative settings.

Another outlet of the diverter distributor 510 is connected to the P port of the electromagnetic reversing valve 400, the A port of the electromagnetic reversing valve 400 is connected to the inlet of the third three-way valve 230, and an outlet of the third three-way valve 230 is connected to the fourth The inlet of the three-way valve 240 is connected, one outlet of the fourth three-way valve 240 is blocked, and the other outlet is connected with the inlet of the distributor 540 on the injection head board. The distributor 540 on the injection head board has four outlets, two of which are One outlet corresponds to two lubricating points on the injection head plate of the injection molding machine, and the other two outlets communicate with the fifth three-way valve 250 and the sixth three-way valve 260 one-to-one, and the two of the fifth three-way valve 250 The outlet corresponds to the other two lubrication points on the injection head plate of the injection molding machine, and the two outlets of the sixth three-way valve 260 correspond to the remaining two lubrication points on the injection head plate of the injection molding machine, so that the fifth three-way valve 250 And the setting of the sixth three-way valve 260 increases the number of outlets of the distributor 540 on the injection head plate, which can correspond to more lubrication points;

Another outlet of the third three-way valve 230 communicates with the inlet of the distributor 560 on the second tailgate, and the distributor 560 on the second tailgate has eight outlets, corresponding to the outlets on the second tailgate of the injection molding machine. Eight lubrication points;

Above, electromagnetic reversing valve 400, third three-way valve 230, fourth three-way valve 240, distributor 540 on the injection head plate, fifth three-way valve 250, sixth three-way valve 260, second tail plate plate The distributor 560 is formed as two special lubricating period oil circuits connected in parallel, the electromagnetic reversing valve 400 is formed as the switching control valve of the special lubricating period oil circuit mentioned above, the distributor 540 on the injection head plate and the second tail plate The distributor 560 on the board is formed as the first distributor of the above-mentioned special lubrication cycle oil circuit. The lubrication cycles of the two special lubrication cycle oil circuits in parallel are consistent, but the oil output of each lubrication point can be different. The second distributor is quantitatively set, and a controller controls the on-off of the electromagnetic reversing valve 400 to realize the lubrication cycle of the special lubrication cycle oil circuit which is different from the conventional lubrication cycle oil circuit.

The present invention also provides a method for controlling a lubrication system, which is applicable to the lubrication system of any one of the foregoing embodiments, including the following steps:

Obtain the lubrication cycle of each lubricating oil circuit;

Control the start and stop of the grease pump according to the acquired lubrication cycle and control the on-off control valve to conduct or block the corresponding lubricating oil circuit.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terms which have been used are words of description and illustration, rather than limitation. Since the present application can be embodied in various forms without departing from the spirit or essence of the examples, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but are to be read broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that come within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims (10)

1. A lubrication system for an injection molding machine, characterized in that it comprises: a grease pump; A plurality of lubricating oil circuits are connected in parallel to the grease pump, at least part of the lubricating oil circuits are provided with a switch control valve and a first distributor, the inlet of the switch control valve communicates with the grease pump, and the switch control valve The outlet of the first distributor communicates with the inlet of the first distributor, and the outlet of the first distributor is configured to be opposite to the position of the lubrication point; a controller, the controller is connected in communication with the grease pump and the switch control valve, and the controller is configured to control the start and stop of the grease pump and control the The switch control valve conducts or blocks the corresponding lubricating oil passage. 2. The lubrication system according to claim 1, characterized in that, The multiple lubricating oil circuits include at least one conventional lubrication cycle oil circuit and at least one special lubrication cycle oil circuit, the lubrication cycle of the special lubrication cycle oil circuit is different from the lubrication cycle of the conventional lubrication cycle oil circuit, wherein, The special lubrication period oil circuit is provided with the switch control valve and the first distributor; The regular lubrication cycle oil circuit is provided with a second distributor, the inlet of the second distributor communicates with the grease pump, and the outlet of the second distributor is arranged opposite to the position of the lubrication point. 3. The lubrication system of claim 2, wherein: At least one of the special lubricating cycle oil passages is provided with a plurality of the first distributors with the same lubricating cycle. 4. The lubrication system of claim 3, wherein: A diverter is also arranged on the special lubrication cycle oil circuit provided with a plurality of the first distributors, the inlet of the diverter communicates with the outlet of the switch control valve, and the outlet of the diverter communicates with a plurality of The first distributors are communicated in one-to-one correspondence. 5. The lubrication system according to any one of claims 2 to 4, characterized in that, A pressure switch is connected in series on the longest oil circuit of the regular lubrication cycle, and the pressure switch can be used to monitor the pressure value of the lubrication system. 6. The lubrication system of claim 5, wherein: The outlet of the pressure switch communicates with one or more of the second distributors. 7. The lubrication system according to any one of claims 2 to 4, further comprising: A temperature sensor configured to monitor the temperature of the workpiece corresponding to each of the lubrication points; a pressure sensor configured to monitor the pressure of each of the first distributors and each of the second distributors; A processor, the processor is communicatively connected with the controller, the temperature sensor and the pressure sensor, and the processor is configured to obtain the production cycle, the number of times each lubrication point corresponds to the workpiece, and each lubrication point corresponds to the workpiece The temperature of the lubricating oil circuit can be determined according to one or more of the production cycle, the number of times each lubrication point corresponds to the workpiece, and the temperature of the workpiece corresponding to each lubrication point, and the determined lubrication cycle is fed back to the the controller. 8. The lubrication system according to any one of claims 1 to 4, characterized in that, The switch control valve includes an electromagnetic reversing valve, and the electromagnetic reversing valve has A port, B port, P port and T port, wherein the P port is used as an inlet to communicate with the grease pump, and the A port is used as a The outlet communicates with the first distributor, the B port and the T port are provided with plugs, and the controller is configured to control the spool of the electromagnetic reversing valve between the A port and the B port. mouth movement. 9. An injection molding machine, characterized in that it comprises: Multiple lubrication points; The lubricating system according to any one of claims 1 to 8, wherein the outlet of the first distributor of the lubricating system is arranged opposite to the lubricating point. 10. A method for controlling a lubrication system, suitable for the lubrication system according to any one of claims 1 to 8, characterized in that it comprises the following steps: Obtain the lubrication cycle of each lubricating oil circuit; Control the start and stop of the grease pump according to the acquired lubrication cycle and control the on-off control valve to conduct or block the corresponding lubricating oil circuit.

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