JP4551213B2 - Injection molding machine - Google Patents

Description

  The present invention relates to an injection molding machine that includes a mold clamping device and an injection device on a bed, and a lubrication device that supplies lubricating oil such as oil or grease to a required lubrication portion of the mold clamping device and the injection device. .

Conventionally, as this type of injection molding machine, for example, the one shown in Japanese Patent Laid-Open No. 2000-176985 and shown in FIG. 27 is known. This includes a mold clamping device 110 and an injection device 120 on a bed 100.
The mold clamping device 110 is provided on a fixed mold board 112 to which a fixed mold 111 is attached, and a movable mold 113 and a tie bar 115 provided on the fixed mold board 112 so as to be movable back and forth, and is fixed during advancement. A movable mold plate 117 constituting a molding die 116 for forming a molten raw material by bringing the mold 111 and the movable die 113 into contact with each other, a toggle mechanism 118 for moving the movable mold plate 117 back and forth, and a toggle mechanism 118 And a mold clamping ball screw mechanism 119 for driving. The movable mold platen 117 is slidably supported by the bed 100 at the support part 117a. Further, the toggle mechanism 118 is slidably supported on the bed 100 via a support base 118a for position adjustment when the molding die 116 is set.

  On the other hand, the injection device 120 is provided in the machine base 121 and is heated by a heater and accommodates the molten raw material. The injection device 120 is rotated in the cylinder 122 and moved forward and backward, and when the advanced material is advanced, the molten raw material is formed from the nozzle 123 of the cylinder 122. An injection screw 124 to be sent to the mold 116 and an injection ball screw mechanism 125 that is provided on the machine base 121 and moves the injection screw 124 forward and backward are provided. The machine base 121 is slidably supported on the bed 100 in order to position the nozzle 123 of the cylinder 122 with respect to the molding die 116.

  This injection molding machine includes a lubrication device 130 that feeds lubricating oil (grease in the present injection molding machine) to required lubrication locations of the mold clamping device 110 and the injection device 120. The lubrication point is divided into a large capacity, a medium capacity, and a small capacity when the required oil supply amount is roughly classified, and the movable part LL of the injection ball screw mechanism 125 that requires a large capacity, and a toggle mechanism that requires a medium capacity. 117 each of the joint parts of the toggle link (upper) LM1, each joint part of the toggle link (lower) LM2, the movable part LM3 of the clamping ball screw mechanism part 119, and the tie bar 115 of the movable mold platen 117 requiring a small capacity. The sliding part LS1, the sliding part LS2 with respect to the bed 100 at the support part 117a of the movable mold platen 117, the sliding part LS3 with respect to the bed 100 at the support base 118a of the toggle mechanism 118, and the bed 121 with respect to the bed 100 at the machine base 121 of the injection device 120. The sliding part LS4 etc. are mainly mentioned.

  Conventionally, as shown in FIG. 27, the lubrication apparatus 130 includes a lubrication pipeline that supplies lubricating oil from one pump 131 to a lubrication location. The lubrication pipes are provided with a plurality of valves 132 for discharging the lubricating oil provided in the block body 133 (junction), distribution stations S1, S2, and S3 for distributing the lubricating oil from the respective valves 132, and a distribution station branched from the pump 131. A main pipe 134 piped to S1, S2 and S3 and an oil supply pipe 135 piped from the valve 132 of each of the distribution stations S1, S2 and S3 to each lubrication location are configured. The main pipe 134 is branched into branch pipes 134a and 134b, and each distribution station S1, S2, S3 is connected to each branch pipe individually or in series. Distribution stations S1, S2, and S3 are provided in base 100 and each machine part.

Further, as the valve 132, for example, a known metering valve which is operated by pressurizing and depressurizing the lubricating oil and is classified into a discharge amount of one shot in a range of 0.03 ml to 1.5 ml is used. Are appropriately selected according to the amount of oil supplied at each of the lubrication points (LL, LM1, LM2, LM3, LS1, LS2, LS3, LS4, etc.).
The pump 131 is intermittently driven for each predetermined number of molding cycles by the molding die 116 counted by, for example, a counter, and supplies the lubricating oil to each lubrication location for each driving. In general, the intermittent time is determined based on a lubrication point having the largest amount of oil supply.

JP 2000-176985 A

By the way, in such an injection molding machine, in the lubrication apparatus, the valve 132 is appropriately selected according to the amount of oil supplied at each lubrication location (LL, LM1, LM2, LM3, LS1, LS2, LS3, LS4, etc.). The distribution stations S1, S2, and S3 have the following problems.
(1) Since the main pipe 134 is branched into the branch pipes 134a and 134b, if the lengths of the branch pipes 134a and 134b are different, until the maximum pressure at which the valve 132 is activated in the branch pipes 134a and 134b is reached. For example, if there are 1m and 6m branch pipes, the 6m branch pipe has a slower pressure rise than the 1m branch pipe. In the pipe, the maximum pressure continues to act for the time until the branch pipe whose pressure rises slowly increases until the pressure rises. Therefore, the load such as the pump 131 and the valve 132 is burdened and the durability is adversely affected. Also, there is a problem that it becomes a factor of grease sticking.

(2) In order to solve this, it is conceivable to shorten the length of the branch pipes 134a and 134b and lengthen the length of the oil supply pipe 135 from the valve 132. However, increasing the length of the oil supply pipe 135 is not preferable because the pressure load of the oil supply pipe 135 acts on the valve 132 and causes the grease to stick. In particular, when the lubrication location has a high oil supply load, it is more susceptible to adverse effects.

(3) Further, since the main pipe 134 is branched into the branch pipes 134a and 134b, for example, a T-shaped connecting member must be used at the branch point, so that a pressure loss is generated accordingly, and smooth pressure increase and depressurization are achieved. In this respect as well, there is a problem in that equipment such as the pump 131 and the valve 132 is burdened and the durability is adversely affected, and the grease is fixed.

(4) Furthermore, a known metering valve is used in which the discharge amount of one shot is classified in the range of 0.03 ml to 1.5 ml, but these operation intervals (intermittent time) have the largest amount of oil supply. Since it is determined based on the lubrication location, a lubrication location with a small amount of lubrication is selected and handled with a small discharge amount per shot. However, in such a place, there are still places where the amount of oil supply increases, and in that case, excessive oil supply occurs. For this reason, there is a request for an appropriate amount of lubrication so that it can be adjusted in intermittent time, but in the example in the figure, there is a problem that it is difficult to handle because priority is given to lubricated parts with a large amount of lubrication. It was.

(5) Further, since the types of the used valves 132 are increased, there is a problem that it becomes complicated at the time of assembly and management becomes complicated. That is, there is a request to reduce the number of valves 132 used as much as possible and adjust the amount of oil supplied in an intermittent time to supply an appropriate amount of oil, but in the example shown in the figure, priority is given to a lubricated portion with a large amount of oil supplied. Therefore, there was a problem that it was difficult to respond.

(6) Furthermore, in the injection molding machine, in order to improve the workability of taking out the molded product, the pump 131 of the lubrication device 130 is avoided as far as possible from the center where the molding die 116 is located, and the end of the mold clamping device 110 is And the distribution stations S1, S2, and S3 are also desired to be consolidated on the mold clamping device 110 side due to the assembly of the mold clamping device 110 and the injection device 120 with respect to the bed 100. This is preferable because the oil supply pipe 135 piped from the distribution station on the side to the lubrication point on the injection apparatus 120 side becomes long and the pressure load of the oil supply pipe 135 acts on the valve 132 as described above, which also causes the grease to adhere. Absent. In particular, when the lubrication location has a high oil supply load, it is more susceptible to adverse effects. Therefore, in this case, a lubrication point on the injection device 120 side should be adjusted in an intermittent time by using a valve with as much discharge as possible so that the pressure load of the oil supply pipe 135 can be covered with the capacity of the valve 132. However, in the example in the figure, there is a problem that the intermittent time gives priority to a lubricated portion with a large amount of oil supply, so that it is difficult to cope with it.

  The present invention has been made in view of the above problems, and when supplying lubricating oil from one pump to each lubrication location, the pressurization time in the lubrication pipeline is shortened so that pumps, valves, etc. Reduces the burden on the equipment, reduces the cause of grease sticking, improves durability, and reduces the number of valves used, facilitating assembly and management. To make it possible to supply an appropriate amount of oil, to improve the versatility by increasing the degree of freedom in the way of supplying the lubricating oil, and to consolidate the lubrication system. An object of the present invention is to provide an improved injection molding machine.

In order to achieve such an object, the injection molding machine of the present invention comprises a mold clamping device and an injection device on a bed, and lubricates the mold clamping device and the injection device with a lubricating oil supplied to required lubrication locations. In an injection molding machine equipped with a device,
The lubrication device is provided in parallel with each other, and three or more lubrication pipelines for feeding the lubrication oil to required lubrication locations of the mold clamping device and the injection device, and the lubrication oil is fed to the plurality of lubrication pipelines One pump and a switching valve that is connected to the pump and is switched to enable the lubricating oil from the pump to be fed to any one of the plurality of lubricating pipes. .

As a result, when lubrication is performed by the lubrication device, the switching valve is switched at an appropriate intermittent time, and any one of the lubrication lines is made effective and the pump is operated. As a result, the lubricating oil is supplied to the lubrication portion by the lubrication pipe that has become effective, and lubrication is performed.
In this case, the lubricating oil can be supplied by varying the intermittent time of each lubricating pipe. For example, a portion that secures a predetermined amount of oil supply by one oil supply and a single oil supply amount can be reduced. Even when there is a mixture of portions that are refueled in several times to ensure a predetermined amount of oil per unit time, lubricating oil can be supplied corresponding to this and the versatility is improved. Moreover, the loss of the lubricating oil supplied compared with the conventional lubrication system can be reduced. In addition, lubricating oil can be supplied to three or more lubricating pipelines with a single pump, and more than three lubricating pipelines can be supplied only by switching the switching valve, so there is no need to provide a separate pump for each lubricating pipeline. However, the system can be simplified and the cost can be reduced accordingly.

  And in this case, since each lubrication pipe is divided and refueled, even if the length of the lubrication pipe is different, as compared with the case where oil is fed to all the pipes at once, Volume change is reduced and the pressurization time is shortened. Therefore, the burden on equipment such as a pump and a valve can be reduced, and in the case of grease, the sticking factor is reduced, and durability can be improved. Furthermore, since branch points of the main pipe are reduced and pressure loss can be reduced, smooth pressure increase and depressurization can be performed. In this respect as well, the burden on equipment such as pumps and valves can be reduced. In the case of grease, the sticking factor is reduced, and durability can be improved.

If necessary, each of the lubricating pipes is provided with a valve for discharging the lubricating oil, a distribution station for distributing the lubricating oil, a main pipe piped from the pump to the distributing station, and a valve for the distributing station. And a lubrication pipe that is piped to each of the lubrication points, and a distribution station for each of the lubrication pipes is provided on one side of the mold clamping device and the injection device.
As a result, the pump and the distribution station are provided on one side of the mold clamping device and the injection device, so that the pump and the distribution station of the lubrication device can be easily assembled and the assembly of the injection device to the bed can be facilitated. At this time, it is only necessary to pipe the oil supply pipe, so that the apparatus can be easily assembled and the assembling efficiency can be improved. In addition, since there is no pump in the center of the molding die, there is no hindrance and workability during molding is ensured.

Furthermore, in this case, the oil supply pipe that is piped from the distribution station on the mold clamping device or the injection device side to the lubrication point on the other side becomes long, but the intermittent time is different for each lubrication pipe line as described above, Since the amount of oil supply can be adjusted, a valve with a large discharge amount per shot can be used even in a lubricated part where the amount of oil supply is small. Therefore, even a long oil supply pipe can withstand the pressure load acting on the valve. In this case, the cause of the sticking is also reduced. In particular, it becomes effective where the lubrication point has a high oil supply load.
In addition, since an appropriate amount of oil can be supplied by adjusting the amount of oil supply in the intermittent time, the types of valves used can be reduced, and assembly and management become extremely easy.

Further, if necessary, at least one of the plurality of lubrication pipelines is constituted by a depressurization pipeline that is supplied with lubricating oil and needs to be depressurized, and at least one other lubrication pipeline is lubricated. It is effective to be constituted by a non-depressurization pipeline that supplies oil and does not require depressurization.
In this case, as the depressurization conduit, a valve is provided that feeds the lubricating oil and is operated by pressurizing and depressurizing the lubricating oil to discharge the lubricating oil, and requires depressurization for the operation of the valve. A non-depressurization pipe that is fed with lubricating oil and discharges the lubricating oil by pressurizing the lubricating oil. The valve is provided with two systems of depressurizing pipes each including a first depressurizing pipe and a second depressurizing pipe In addition, it is possible to adopt a configuration provided with one system of non-depressurization pipelines that does not require depressurization for the operation of the valve.
The depressurization pipe line is provided with a single piston that is reciprocated by the pressurization and depressurization of the lubricating oil and discharges the lubricating oil, and one discharge port corresponding to this piston, and the discharge amount per shot is 0.03 ml. A single metering valve classified in the range of ~ 1.5 ml is used, and in the non-depressurization line, there are a plurality of pistons that are reciprocated in order by pressurization of the lubricating oil and discharge the lubricating oil, and the pistons. A progressive metering valve having a plurality of pairs of corresponding pairs of discharge ports can be used.

  In addition, if necessary, the lubrication apparatus includes a plurality of switching valves that are sequentially connected to and connected to the pump and are switched to supply lubricating oil individually to the pipelines. An input port connected to the discharge port side of the pump, a drain port opened to the lubricating oil reservoir side, and any one of the plurality of pipes Drain connected to the drain port of the main port connected to the input port of the lower switching valve on the road side, the sub port connected to one of the other pipes, and the drain port of the lower switching valve, and communicating with its own drain port It has a connection port and connects the input port and sub-port when energized, and the drain port, drain connection port and main port are It consists of a solenoid valve that shuts off from the power port and sub-port, connects the input port and main port when the power is off, connects the drain port and sub-port, and shuts off the input port and sub-port. The lowermost switching valve is connected to any one of the input port connected to the discharge port side of the pump, the drain port opened to the lubricating oil reservoir side, and the plurality of pipelines. A main port and a sub port connected to any one of the other conduits, and when the power is turned on, the input port and the sub port are connected and the drain port and the main port are disconnected from the input port and the sub port. When the power is off, connect the input port to the main port, and connect the drain port to the subport. It is constituted by a solenoid valve for blocking the said input port and said sub-port with connecting and.

As a result, this lubrication apparatus can be operated with a total of two switching valves, one switching valve higher than the lowest switching valve and one lower switching valve. When the lubricating oil is individually fed to the three lines using this lubricating device, it is performed as follows.
When supplying to any of the pipelines connected to the sub-ports of each switching valve, the solenoid valve of the switching valve with the sub-port to which the pipeline to which lubricating oil is to be supplied is energized, and the input and sub-ports are energized. And the drain port and the main port are connected, and the input port and the sub port are blocked from the drain port and the main port. Further, the switching valve higher than this switching valve is de-energized, the input port and the main port are connected, the drain port and the sub port are connected, and the input port and the sub port are shut off. Therefore, the lubricating oil from the pump is fed to the lower switching valve through the input port and the main port in the switching valve higher than the energized switching valve. In the energized switching valve, the lubricating oil from the upper main port is supplied to the pipe line connected to the sub port through the input port and the sub port.

  Further, when the supply of the lubricating oil is stopped, the operation of the pump is deactivated, and the energized switching valve is deactivated by operation. The deenergized switching valve connects the input port and the main port, connects the drain port and the sub port, and blocks the input port and the sub port. At this time, the lubricating oil of the pipe line connected to the subport of the switching valve passes through the subport and the drain port, and passes through the drain connection port and the drain port of the switching valve higher than the deenergized switching valve. Pull out to the lubricating oil reservoir. For this reason, the line of the deenergized switching valve is depressurized. As a result, even if the pipe connected to the sub-port of the switching valve has a valve that needs to be depressurized, such as a single metering valve, it is released and can be operated. Even when the lubricating oil is supplied to the pipe line, the single metering valve of the pipe line is operated once, and the lubricating oil is discharged and supplied to the portion to be supplied with oil.

Next, when lubricating oil is supplied to the pipe line connected to the main port of the lowest switching valve, the pump is operated and the solenoid valves of all the switching valves are de-energized. As a result, the switching valve higher than the lowest one is de-energized, so that the input port and the main port are connected, the drain port and the subport are connected, and the input port and the subport are blocked. Further, since the lowest switching valve is also de-energized, the drain port and the sub port are connected and the input port and the sub port are shut off. Therefore, the lubricating oil from the pump passes through the input port and main port of the upper switching valve, and is supplied to the pipe line connected to the main port through the lowermost input port and main port.
As a result, the energization / non-energization of each switching valve makes it possible to supply lubricating oil to each of a plurality of pipelines with a single pump to three different pipelines, with one lubrication per unit time. Different intermittent times in which a part for securing a predetermined amount of oil and a part for reducing the amount of oil supplied once and refueling in several times to ensure a predetermined amount of oil per unit time 3 Lubricating oil can be supplied to each pipeline of the system.

When lubricating oil is supplied to four lines by adding another one in addition to the three lines, the switching valve higher than the two lowest switching valves and one lowest A total of three switching valves are used. In this case, for example, the input port and drain port of the added switching valve are connected to the main port and drain connection port of the higher order switching valve connected to the pump, respectively, and the main port and drain connection port are switched to the lowest order. Connect to the input port and drain port of the valve. And the 4th system pipe line is connected to the subport of this switching valve. Further, when lubricating oil from one pump is individually supplied to five or more pipelines, the number of switching valves higher than the lowest switching valve is similarly applied according to the number of pipelines to be supplied. And connect to the pump together with the lowest switching valve. And when supplying the lubricating oil from the pump to these pipelines, the pipeline is connected to the subport of this switching valve, and the switching valve having the subport to which the pipeline to be supplied is connected is energized, Operate the pump to supply lubricating oil.
As a result, the lubricating oil can be individually fed to three or more pipelines. Therefore, since intermittent time can be set for each pipeline, the degree of freedom in how to supply the lubricating oil is increased, and versatility is enhanced. Therefore, the loss of the lubricating oil supplied compared with the conventional lubrication system can be reduced. In addition, it is not necessary to provide a new pump for the increased number of pipelines, and the system can be simplified and the cost can be reduced.

In this lubricating device, the lubricating oil in the pipe line connected to the sub-port of the switching valve other than the energized switching valve passes through the sub-port and the drain port, and is higher than the switching valve to which this pipe line is connected. It goes out through the drain connection port and drain port of the switching valve to the lubricating oil reservoir. Therefore, the pipe line connected to the sub-port of the switching valve other than the energized switching valve is always depressurized except when the switching valve is on, so that the depressurization is ensured.
Furthermore, since these switching valves are sequentially connected to the pump, they are compact and easy to handle, and the piping work can be simplified compared to the case where a switching valve is provided separately. Can be improved.

Further, if necessary, the solenoid valve of the switching valve higher than the lowest switching valve is connected to the drain port and the main port when energized, and the solenoid valve of the lowest switching valve is connected. The drain port and the main port are connected when energized.
At this time, the lubricating oil of the pipe line connected to the main port of the lowest switching valve passes through the main port and the input port of the lower switching valve than the switching valve that is operated and energized, and the switching oil turned on. The pipe connected to this main port passes through the main port and drain port of the valve and passes through the drain connection port and drain port of the switching valve higher than the switching valve that is turned on to the lubricating oil reservoir side. The road is also depressurized. For this reason, the pipe connected to the main port of the lowest switching valve can be provided with a valve that requires depressurization, such as a single metering valve.

Further, if necessary, the operation of the pump and a stop mode in which all solenoid valves are turned off, and the operation of the pump is turned on / off by turning on one of the solenoid valves to turn on or off the pump. A sub-port supply mode for supplying lubricating oil to the pipes connected to the sub-ports of the two solenoid valves, and turning on and off the pumps with all the solenoid valves turned off to turn on the main of the lowermost switching valve. A controller that can be set to any one of the lowest main port supply mode for supplying lubricating oil to the pipe line connected to the port is provided.
Various lubrication patterns can be realized by switching the mode of the controller, making it possible to easily set the intermittent time for each pipeline, and reducing the loss of lubricating oil.

Furthermore, the plurality of switching valves can be attached to and detached from the pump as required.
Instead of the switching valve, for example, a block provided with a discharge port dedicated to the non-depressurization line can be attached, so that it can be easily replaced with another form of pump, and versatility can be increased.

According to the lubricating device of the present invention, it becomes possible to individually supply lubricating oil from one pump to each of three or more pipelines, increasing the degree of freedom in how to supply the lubricating oil, and versatility. The system is simplified and the cost can be reduced. In addition, since the lubricating oil can be individually supplied to each pipe line, the degree of freedom of the way of supplying the lubricating oil is increased, and the lubricating oil can be supplied by changing the intermittent time of each pipe line. Can be improved. Furthermore, the loss of the lubricating oil supplied compared with the conventional lubrication system can be reduced.
Furthermore, when supplying lubricating oil from one pump to each lubrication point, the pressure increase time in the lubrication pipeline is shortened, the burden on equipment such as pumps and valves is reduced, and the cause of grease sticking And durability can be improved. In addition, the number of types of valves used can be reduced to facilitate assembly and management, and an appropriate amount of oil can be supplied by adjusting the amount of oil supplied in an intermittent time. There are various effects such as increasing the degree of freedom of the way of supplying oil, improving versatility, and consolidating lubricating devices.

Hereinafter, an injection molding machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the same thing as the above.
The injection molding machine according to the embodiment of the present invention is for injection molding of resin or metal. As shown in FIG. 1, the basic configuration is that a mold clamping device 110, an injection device 120, and the like are placed on a bed 100. And a lubricating device S that feeds lubricating oil to required lubricating portions of the mold clamping device 110 and the injection device 120. In the lubrication apparatus S, grease which is lubricating oil is supplied.

  The mold clamping device 110 is provided on a fixed mold board 112 to which a fixed mold 111 is attached, and a movable mold 113 and a tie bar 115 provided on the fixed mold board 112 so as to be movable back and forth, and is fixed during advancement. A movable mold plate 117 constituting a molding die 116 for forming a molten raw material by bringing the mold 111 and the movable die 113 into contact with each other, a toggle mechanism 118 for moving the movable mold plate 117 back and forth, and a toggle mechanism 118 And a mold clamping ball screw mechanism 119 for driving. The movable mold platen 117 is slidably supported by the bed 100 at the support part 117a. Further, the toggle mechanism 118 is slidably supported on the bed 100 via a support base 118a for position adjustment when the molding die 116 is set.

  The injection device 120 is provided on the machine base 121 and is heated by a heater and accommodates the molten raw material. The injection device 120 is rotated in the cylinder 122 and moved forward and backward. An injection screw 124 to be sent to 116 and an injection ball screw mechanism 125 that is provided in the machine base 121 and moves the injection screw 124 forward and backward are provided. The machine base 121 is slidably supported on the bed 100 in order to position the nozzle 123 of the cylinder 122 with respect to the molding die 116.

As shown in FIGS. 1 to 21, the lubrication device S feeds lubricating oil (grease in the present injection molding machine) to the required lubrication points of the mold clamping device 110 and the injection device 120, and includes three systems of lubrication. Pipe lines P1, P2, P3, one pump 10 for feeding the lubricating oil stored in the lubricating oil storage section 20, and a plurality of lubricating pipe lines P1 that are successively connected to and connected to the pump 10 and switched. , P2 and P3 are provided with a plurality of switching valves 30 and 50 for supplying lubricating oil individually.
The lubrication apparatus S shown in FIGS. 1 to 21 has two switching valves connected in series so as to correspond to three pipe lines. The grease from the pump 10 can be supplied to the lubrication system including the first, second, and third pipes P1, P2, and P3 of three different systems through the plurality of switching valves. ing.

  As shown in FIG. 1, the lubrication points lubricated by the lubrication apparatus S are classified into large capacity, medium capacity, and small capacity by roughly classifying the required amount of oil supply into an injection ball screw mechanism portion that requires a large capacity. The movable portion LL, the joint portion (upper) LM1 of the toggle link 118 of the toggle mechanism 118 that requires medium capacity, the lower joint LM2 of the toggle link LM2, the movable portion LM3 of the clamping ball screw mechanism portion 119, a small capacity The required sliding portion LS1 of the movable mold plate 117 with respect to the tie bar 115, the sliding portion LS2 with respect to the bed 100 at the support portion of the movable mold plate 117, and the sliding portion LS3 with respect to the bed 100 at the support base of the toggle mechanism 118. The sliding part LS4 with respect to the bed 100 in the machine base 121 of the apparatus 120 is mainly exemplified.

  Of the first, second and third pipes P1, P2 and P3, the first and second pipes P1 and P2 are constituted by a depressurization pipe which is supplied with lubricating oil and needs to be depressurized. The path P3 is configured by a non-depressurization pipeline that is supplied with lubricating oil and does not require depressurization. The first pipe line P1 is responsible for a medium-capacity lubrication point, and the second pipe line P2 is responsible for a low-capacity lubrication point. Moreover, the 3rd pipe line P3 is responsible for a large capacity | capacitance lubrication location.

  The first pipe line P1 includes a distribution station (SA, SD) in which a plurality of single metering valves Vt for discharging lubricating oil are provided in a block body (junction) and distributes lubricating oil from each single metering valve Vt, and a pump Main pipe 134 (P1) branched and piped from 10 to each distribution station (SA, SD), and oil supply pipe 135 piped from the single metering valve Vt of each distribution station (SA, SD) to each lubrication point. And is configured.

  The second pipe P2 includes a distribution station (SB, SC, SE) in which a plurality of single metering valves Vt for discharging lubricant oil are provided in a block body (junction), and the lubricant oil is distributed from each single metering valve Vt. From the pump 10 to the distribution station (SB, SC, SE) connected in series, the main pipe 134 (P2) piped and the single metering valve Vt of the distribution station (SB, SC, SE) to each lubrication point A piped oil supply pipe 135 is provided. Note that a flexible pipe capable of accommodating expansion and contraction is appropriately used as the main pipe that is piped to the movable part.

  A single metering valve Vt used in the first and second pipes P1 and P2 is a single piston (not shown) that is reciprocated by the pressurization and depressurization of the lubricant to discharge the lubricant, and this This is a well-known valve that has one discharge port corresponding to the piston and is classified in the range of a discharge amount of 0.03 ml to 1.5 ml per shot. In each distribution station (SA, SD, SB, SC, SE) of the first and second pipes P1, P2, a required one is selected from these single metering valves Vt having different types of discharge amount. Is provided.

Specifically, in the first pipeline P1, the distribution station (SA) is provided with a corresponding required single metering valve Vt for refueling each joint portion (upper) LM1 of the toggle link of the toggle mechanism 118, The distribution station (SD) is provided with a corresponding single metering valve Vt for supplying oil to each joint part (lower) LM2 of the toggle link and the movable part LM3 of the clamping ball screw mechanism 119.
Further, in the second pipe P2, the distribution station (SB) is provided with a corresponding single metering valve Vt corresponding to supply oil to the sliding portion LS4 with respect to the bed 100 in the base of the injection device 120. In the station (SC), the corresponding required single fixed quantity for refueling the sliding part LS2 with respect to the bed 100 at the support part of the movable mold plate 117 and the sliding part LS3 with respect to the bed 100 at the support base of the toggle mechanism 118. A valve Vt is provided, and the distribution station (SE) is provided with a corresponding required single metering valve Vt for refueling the sliding part LS1 with respect to the tie bar 115 of the movable mold platen 117.

  The third pipe P3 includes a distribution station (SF) composed of a progressive metering valve Vs for discharging lubricating oil, a main pipe piped from the pump 10 to the distribution station (SF), and a distribution station (SF). It comprises an oil supply pipe 135 piped from the progressive metering valve Vs to each lubrication location.

Progressive metering valve Vs includes a plurality of pistons (not shown) that are reciprocated in order by pressurization of lubricating oil to discharge the lubricating oil, and a plurality of pairs of discharge ports corresponding to the pistons. It is a well-known valve. In the progress type metering valve Vs, the discharge amount per one stroke of the piston is set to about 0.1 ml, for example, the piston is operated for a predetermined stroke and stopped for a predetermined time, and a relatively large amount of lubricating oil is intermittently supplied in a fixed amount. is doing.
In the third pipeline P3, the distribution station (SF) is provided with a corresponding progressive metering valve Vs for refueling the movable part LL of the injection ball screw mechanism 125.

The distribution stations (SA, SD, SB, SC, SE, SF) of the respective lubrication pipes are concentrated on one side of the mold clamping device 110 and the injection device 120, in the embodiment, on the mold clamping device 110 side. Is provided. Specifically, as shown in FIG. 1, the pump 10 is installed at the end of the bed 100 on the mold clamping device 110 side, the distribution station (SA) is installed above the toggle, and the distribution station (SD) is the movable mold platen 117. The distribution station (SB) is installed on the bed 100 where the movable mold platen 117 moved forward, the distribution station (SC, SE) is installed on the movable mold platen 117, and the distribution station (SF) is fixed. It is installed on the bed 100 where the mold board 112 is located.
For this reason, since the pump 10 and the distribution station (SA, SD, SB, SC, SE, SF) are concentrated on the mold clamping device 110 side, it is easy to assemble and when the injection device 120 is assembled to the bed 100. However, it is only necessary to pipe the oil supply pipe 135. Therefore, the apparatus can be easily assembled and the assembling efficiency can be improved. Further, since there is no pump 10 in the center of the molding die 116, there is no obstacle and workability at the time of molding is ensured.

  As shown in FIGS. 3 to 5, the pump 10 is a plunger-type pump including a piston 11 and a cylinder 12, and is reciprocated by a drive motor 13 via a cam mechanism 14. A lubricating oil reservoir 20 is provided on the upper side of the pump 10, and a switching valve mounting portion 15 is formed on the lower side. As shown in FIG. 5, the lower mounting portion 15 of the pump 10 is provided with a discharge port 16 for discharging lubricating oil, and a return port 17 communicating and opening to the lubricating oil storage unit 20 side is exposed. Is provided. As shown in FIG. 4, the lubricating oil reservoir 20 includes a lubricating oil cartridge 21 made of grease, a cartridge mounting portion 22 to which the cartridge 21 is mounted, and a cover 23 that is mounted on the cartridge mounting portion 22 and covers the cartridge 21. It is prepared for.

The plurality of switching valves includes a first switching valve 30 that is higher than the lowest switching valve and a second switching valve 50 that is the lowest switching valve.
The first switching valve 30 is composed of a first solenoid valve 30a, and is connected to the first input port 31 and the return port 17 connected to the discharge port 16 side of the pump 10, and is opened to the lubricating oil reservoir 20 side. The drain port 32, the first main port 33 connected to the second input port 51 of the second switching valve 50 described later, the first subport 34 connected to the first pipe P1, and the second switching valve 50 described later. The drain connection port 35 is connected to the two drain ports 52 and communicates with the first drain port 32 itself.

The first input port 31 and the first drain port 32 are formed in a mounted portion 36 to the pump 10 above the switching valve 30, and the first subport 34 is formed facing the front of the first switching valve 30, The main port 33 and the drain connection port 35 are formed in a mounting portion 37 to the lower switching valve (second switching valve 50) on the lower side of the first switching valve 30. Reference numeral 38 denotes a vacant port formed for processing and is closed by a plug 39.
As shown in FIGS. 2, 8 to 10, 14 to 17, 20, and 21, 40 is a spool, 41 is a first solenoid that drives the spool 40, and 42 is to return the spool 40 to a steady position. It is a spring. The spool 40 is pulled by the excitation of the first solenoid 41 when the first solenoid 41 is energized to connect the first input port 31 and the first subport 34, and the first drain port 32 and the first main port. 33, and the first drain port 32, the drain connection port 35, and the first main port 33 are disconnected from the first input port 31 and the first subport 34, and the spring 42 is turned off when the first solenoid 41 is de-energized. The first input port 31 and the first main port 33 are connected, the first drain port 32 and the first subport 34 are connected, and the first input port 31 and the first subport 34 are connected to each other. Shut off. In the lubricating device S, the first pipe P <b> 1 is connected to the first subport 34.

  The second switching valve 50 is composed of a second solenoid valve 50a, a second input port 51 connected to the first main port 33 of the first switching valve 30 on the discharge port 16 side of the pump 10, and a first switching valve. The second drain port 52 connected to the 30 drain connection port 35 and opened to the lubricating oil reservoir 20 side, the second main port 53 connected to the third pipeline P3, and the second connected to the second pipeline P2. A sub-port 54 is provided. The second input port 51 can be connected to the pump 10 via the first switching valve 30, and the second drain port 52 connects the drain connection port 35 and the first drain port 32 of the first switching valve 30. To the lubricating oil reservoir 20 side.

The second input port 51 and the second drain port 52 are formed in the mounted portion 56 to the first switching valve 30 above the second switching valve 50, and the second subport 54 is formed facing the front of the switching valve 50. The second main port 53 is formed below the second switching valve 50. Reference numeral 58 denotes a vacant port formed for processing, which is closed by a plug 59.
As shown in FIGS. 2, 11 to 15, 18, and 19, 60 is a spool, 61 is a second solenoid that drives the spool 60, and 62 is a spring that returns the spool 60 to a steady position. The spool 60 is pulled by the excitation of the second solenoid 61 when the second solenoid 61 is energized to connect the second input port 51 and the second subport 54, and the second drain port 52 and the second main port. 53, and the second drain port 52 and the second main port 53 are shut off from the second input port 51 and the second subport 54, and are returned to the steady position by the spring 62 when the power is turned off. The input port 51 and the second main port 53 are connected, the second drain port 52 and the second subport 54 are connected, and the second input port 51 and the second subport 54 are blocked.
In the figure, reference numeral 66 denotes a cover for protecting the first solenoid 41 of the first switching valve 30 and the second solenoid 61 of the second switching valve 50.
In the lubricating device S, the second pipe P2 is connected to the second subport 54, and the third pipe P3 is connected to the second main port 53.

  The first switching valve 30 is detachably attached to the pump 10. Specifically, the mounting portion 15 of the pump 10 and the mounted portion 36 of the first switching valve 30 are formed in close contact with each other, and the pump 10 is provided with the first switching valve 30 as shown in FIG. Four female threads 18 for mounting are formed. As shown in FIGS. 6, 8, 10, 16, and 17, the first switching valve 30 is a bolt that is screwed into the female thread 18 of the pump 10. (Not shown) is inserted, and four mounting holes 45 are provided for mounting the first switching valve 30 to the pump 10 by pressing it toward the pump 10 with a bolt head. Then, with the mounting portion 15 of the pump 10 and the mounted portion 36 of the first switching valve 30 in close contact with each other, a bolt is inserted into the mounting hole 45 and screwed into the female screw 18, whereby the first switching valve 30 is pumped. 10 is attached.

  Further, the mounting portion 37 of the first switching valve 30 and the mounted portion 56 of the second switching valve 50 are formed in close contact with each other, and as shown in FIG. Four female threads 46 for mounting the two switching valve 50 are formed. As shown in FIGS. 7, 11, 13, 18, and 19, the second switching valve 50 includes the first switching valve 30. Bolts (not shown) that are screwed into the female screws 46 are inserted, and four mounting holes 65 for mounting the second switching valve 50 to the pump 10 by pressing toward the pump 10 with the bolt heads are provided. Then, with the mounting portion 37 of the first switching valve 30 and the mounted portion 56 of the second switching valve 50 being in close contact with each other, a bolt is inserted into the mounting hole 65 and screwed into the female screw 46, whereby the second switching valve. 50 is attached to the first switching valve 30.

  Further, by loosening and removing the bolts, the first switching valve 30 and the second switching valve 50 are removed from the pump 10 and the first switching valve 30, respectively. Therefore, the switching valves 30 and 50 can be easily integrated with the pump 10. In addition, since the switching valves 30 and 50 are integrally attached to the pump 10, it is compact and easy to handle compared to the case where the switching valves 30 and 50 are separately provided. Although not shown, instead of the first switching valve 30, a block that is attached to the mounting portion 15 of the pump 10 with bolts and that has a connection port that communicates only with the discharge port 16 of the pump 10 can be mounted. Yes.

  Further, the lubrication device S includes an operation of the pump 10 and a stop mode Mr in which all the solenoid valves 30a and 50a are turned off, and one of the solenoid valves 30a and 50a is turned on and the operation of the pump 10 is turned on. , Is turned off to supply lubricant to the pipes connected to the subports 34 and 54 of any one of the solenoid valves 30a and 50a, and all the solenoid valves 30a and 50a are turned off, and the pump 10 The controller 70 can be set to any one of the lowest main port supply mode Mm for supplying the lubricating oil to the pipe connected to the main port 53 of the lowest switching valve 50 by turning on and off the operation of Is provided.

  In this embodiment, the controller 70 operates the pump 10 and the stop mode Mr to turn off the solenoid valves 30a, 50a, and turns off the first solenoid valve 30a and turns off the second solenoid valve 50a. The first subport supply mode M1, which is the subport supply mode Ms for supplying the lubricating oil to the first pipeline P1 by turning on and off the operation of No. 10, and the second solenoid valve 50a are turned on, and the first solenoid valve 30a is turned on. The pump 10 is turned off by turning the solenoid valve 30a, 50a off, and the second subport supply mode M2, which is the subport supply mode Ms for supplying the lubricating oil to the second pipe P2 by turning the pump 10 on and off. The second main port of the second switching valve 50 is turned on and off. Third line P3 which is connected to 3 a main port feed mode Mm supplies lubricating oil has become possible to set to either of the second main port feed mode M3.

  That is, the controller 70 turns the pump 10 on and off, the first solenoid 41 on and off, and the second solenoid 61 on and off. In the stop mode Mr, the controller 70 operates the pump 10 and turns off the first solenoid 41 and the second solenoid 61. In the first subport supply mode M1 (Ms), the controller 70 turns on the operation of the pump 10 and the first solenoid 41. Are turned on and the second solenoid 61 is turned off. In the second subport supply mode M2 (Ms), the pump 10 is turned on, the second solenoid 61 is turned on, and the first solenoid 41 is turned off. In the second main port supply mode M3 (Mm), the pump 10 is turned on and the first and second solenoid valves 30a and 50a are turned off in synchronization.

  Therefore, in the injection molding machine according to this embodiment, the lubrication apparatus S performs lubrication as follows. Here, as shown in FIG. 22, the lubrication apparatus S is controlled by the controller 70 in the first subport supply mode M1 (Ms), the stop mode Mr, the second subport supply mode M2 (Ms), the stop mode Mr, and the second main port. A case will be described in which the supply mode M3 (Mm), the stop mode Mr, the second subport supply mode M2 (Ms), and the stop mode Mr are operated as one cycle.

  First, when the controller 70 changes from the stop mode Mr to the first subport supply mode M1 (Ms), the pump 10 is turned on, the first solenoid 41 is turned on, and the second solenoid 61 is turned off, as shown in FIG. It is. Accordingly, as shown in FIGS. 14B, 16B, 18B, and 20B, the first switching valve 30 is on when the first solenoid 41 is energized. The spool 40 is pulled by the excitation of the first solenoid 41. The spool 40 connects the first input port 31 and the first subport 34, and connects the first drain port 32 and the first main port 33. The first input port 31 and the first subport 34 are blocked from the first drain port 32 and the first main port 33. Therefore, the lubricating oil from the pump 10 is supplied to the first pipeline P1 through the first input port 31 and the first subport 34. At this time, the single metering valve Vt provided in the first pipe line P1 is actuated once and the lubricating oil is discharged to lubricate the lubrication site.

  Then, as shown in FIG. 22, after a predetermined time, the controller 70 changes from the first subport supply mode M1 (Ms) to the stop mode Mr, and the operation of the pump 10 and the first switching valve 30 are turned off. Accordingly, as shown in FIGS. 14A, 16A, 18A, and 20A, the first switching valve 30 is turned off when the first solenoid 41 is de-energized. Therefore, the spool 40 is returned to the steady position by the spring 42, and the spool 40 connects the first input port 31 and the first main port 33, and connects the first drain port 32 and the first subport 34. At the same time, the first input port 31 and the first subport 34 are blocked. At this time, since the lubricating oil in the first pipe P1 passes through the first subport 34 and the first drain port 32 to the lubricating oil reservoir 20 side, the first pipe P1 is depressurized. Therefore, since the first pipe line P1 is depressurized, the single metering valve Vt of the first pipe line P1 becomes operable, and in the next first subport supply mode M1 (Ms), the first pipe line P1 is operable. The P1 single metering valve Vt is actuated once, and the lubricating oil is discharged, so that it is reliably supplied to each part having a relatively medium oil supply amount.

  Next, as shown in FIG. 22, since the controller 70 is in the stop mode Mr, the operation of the pump 10 is turned off, the first and second solenoids 41 and 61 are turned off, and lubricating oil is supplied from the lubricating device S. The single metering valve Vt and the progressive metering valve Vs are not activated. In this state, when a predetermined time elapses, the controller 70 sets the second subport supply mode M2 (Ms) from the stop mode Mr to operate the lubrication device S, turns on the operation of the pump 10, turns on the second solenoid 61, The first solenoid 41 is turned off.

  Accordingly, as shown in FIGS. 15A, 17A, 19A, and 21A, the first switching valve 30 is turned off when the first solenoid 41 is de-energized. Therefore, the spool 40 is in a state where it is returned to the steady position by the spring 42. The spool 40 connects the first input port 31 and the first main port 33, and the first drain port 32 and the first subport 34. And the first input port 31 and the first subport 34 are shut off. In the second switching valve 50, since the second solenoid 61 is energized and turned on, the spool 60 is pulled by the excitation of the second solenoid 61, and the spool 60 is connected to the second input port 51 and the second subport. 54, the second drain port 52 and the second main port 53 are connected, and the second input port 51 and the second subport 54 are disconnected from the second drain port 52 and the second main port 53. Therefore, the lubricating oil from the pump 10 is fed to the second pipeline P2 through the first input port 31, the first main port 33, the second input port 51, and the second subport 54. At this time, the single metering valve Vt provided in the second pipe P2 is actuated once and the lubricating oil is discharged to lubricate the lubrication part.

Next, as shown in FIG. 22, after a predetermined time, the controller 70 changes from the second subport supply mode M2 (Ms) to the stop mode Mr, and the pump 10 is turned off and the second switching valve 50 is turned off. It is.
Accordingly, as shown in FIGS. 14A, 16A, 18A, and 20A, the second switching valve 50 is turned off when the second solenoid 61 is de-energized. Therefore, the spool 60 is returned to the steady position by the spring 62, and the spool 60 connects the second input port 51 and the second main port 53, and connects the second drain port 52 and the second subport 54. At the same time, the second input port 51 and the second subport 54 are blocked. At this time, the lubricating oil in the second pipe P2 passes through the second subport 54, the second drain port 52, the drain connection port 35, and the first drain port 32 to the lubricating oil reservoir 20 side. The path P2 is depressurized. Therefore, since the second pipe P2 is depressurized and the single metering valve Vt of the second pipe P2 is operable, in the next second subport supply mode M2 (Ms), the second pipe The single metering valve Vt of P2 is actuated once and the lubricating oil is discharged, so that it is surely supplied to each part where the amount of oil supply may be relatively small.

Next, as shown in FIG. 22, since the controller 70 is in the stop mode Mr, the operation of the pump 10 is turned off, the first and second solenoids 41 and 61 are turned off, and lubricating oil is supplied from the lubricating device S. The single metering valve Vt and the progressive metering valve Vs are not activated.
In this state, when a predetermined time elapses, the controller 70 sets the second main port supply mode M3 (Mm) from the stop mode Mr to operate the lubrication device S, and the pump 10 is turned on as shown in FIG. The first and second solenoids 41 and 61 are turned off. Accordingly, as shown in FIGS. 15B, 17B, 19B, and 21B, the first switching valve 30 is turned off when the first solenoid 41 is de-energized. Therefore, the spool 40 is returned to the steady position by the spring 42, and the spool 40 connects the first input port 31 and the first main port 33, and the first drain port 32 and the first subport 34. Are connected, and the first input port 31 and the first subport 34 are shut off. Further, in the second switching valve 50, since the second solenoid 61 is in an off state when the power is not supplied, the spool 60 is returned to the steady position by the spring 62, and the spool 60 is connected to the second input port 51. The second main port 53 is connected, the second drain port 52 and the second subport 54 are connected, and the second input port 51 and the second subport 54 are blocked. Therefore, the lubricating oil from the pump 10 is supplied to the third pipeline P3 through the first input port 31, the first main port 33, the second input port 51, and the second main port 53. Then, the progressive metering valve Vs provided in the third pipe P3 is actuated to discharge the lubricating oil and lubricate the lubrication site.

Then, as shown in FIG. 22, after a predetermined time, the controller 70 changes from the second main port supply mode M3 (Mm) to the stop mode Mr, and the pump 10 is operated and the second switching valve 50 is turned off. As a result, as shown in FIGS. 14A, 16A, 18A, and 20A, the pump 10 is stopped in the second main port supply mode M3 (Mm). Therefore, the lubricating oil to the 3rd pipe line P3 is also stopped.
In this state, when a predetermined time elapses, the controller 70 sets the second subport supply mode M2 (Ms) from the stop mode Mr to operate the lubrication device S, and as shown in FIG. The second solenoid 61 is turned on and the first solenoid 41 is turned off. Accordingly, as shown in FIGS. 15A, 17A, 19A, and 21A, the pump 10 is similar to the second subport supply mode M2 (Ms). From the first input port 31, the first main port 33, the second input port 51, and the second subport 54, and is supplied to the second pipeline P 2. In this case, the lubricating oil in the third pipeline P3 is released to the lubricating oil reservoir 20 through the second main port 53, the second drain port 52, the drain connection port 35, and the first drain port 32, The third pipeline P3 is also depressurized. The third pipe P3 originally does not need to be depressurized, but can be depressurized. Therefore, even if the third pipe P3 is provided with a single metering valve Vt instead of the progressive metering valve Vs, this Lubricating oil is supplied from the single metering valve Vt. Thereafter, the controller 70 enters the stop mode Mr and the second pipe P2 is depressurized.

Such a cycle is repeated, and at a portion where a predetermined amount of oil is ensured by one refueling, the amount of one oil is reduced and divided into several times from the single metering valve Vt provided in the first pipe P1. From a single metering valve Vt provided in the second pipe P2 to a part that secures a predetermined oil quantity per unit time by refueling, a third pipe P3 to a part that requires a relatively large amount of oil supply. Lubricating oil is supplied from each of the progress type metering valves Vs provided in the motor. For example, as shown in FIG. 23, different intermittent time settings can be selected for each of the first, second and third pipes P1, P2 and P3 in accordance with the molding cycle of the mold.
This increases the degree of freedom in how the lubricant is supplied. That is, the lubricating oil can be supplied by changing the intermittent time of the first, second and third pipes P1, P2, P3, respectively, for example, a portion that secures a predetermined amount of oil supply by one oil supply, Even if there is a mixture of parts that reduce the amount of oil supplied once and divide it into several times to ensure a predetermined amount of oil per unit time, it is possible to supply lubricating oil correspondingly Therefore, versatility is improved. Moreover, the loss of the lubricating oil supplied compared with the conventional lubrication system can be reduced.
Further, since the lubricating oil can be supplied to the three pipelines by one pump 10, and the first, second and third pipelines P1, P2, P3 can be supplied only by switching the switching valves 30, 50, It is not necessary to provide a separate pump 10 for each pipeline, so that the system can be simplified and costs can be reduced.

  Furthermore, in the embodiment, the first, second and third pipelines P1, P2 and P3 are divided and refueled, so the length of the first, second and third pipelines P1, P2 and P3 is long. Even if they are different, the volume change is reduced and the pressurizing time is shortened as compared with the case of refueling all the pipes at once as in the prior art. Therefore, the burden on equipment such as the pump 10 and the valve can be reduced, and the cause of the sticking of the grease is reduced, and the durability can be improved. Furthermore, since branch points of the main pipe are reduced and pressure loss can be reduced, smooth pressure increase and depressurization can be performed. In this respect as well, the burden on equipment such as pumps and valves can be reduced. The cause of sticking of grease is reduced, and durability can be improved.

In the embodiment, since the pump 10 and the distribution station (SA, SD, SB, SC, SE, SF) of the lubrication apparatus S are concentrated on the mold clamping apparatus 110 side, the mold clamping apparatus 110 side. The oil supply pipes 135 piped from the distribution stations (SB, SF) to the lubrication points LL, LS4 on the injection device 120 side become longer. As described above, the first, second and third pipes P1, P2, P3 Since the discharge amount can be adjusted by changing the intermittent time every time, a valve with a large discharge amount per shot can be used even in a lubricated part where the oil supply amount is small. This can counteract the pressure load to be applied, and the factor of grease sticking is reduced.
In addition, since an appropriate amount of oil can be supplied by adjusting the amount of oil supply in intermittent time, the types of valves used can be reduced, and assembly and management become extremely easy.

  In this embodiment, the third solenoid P3 is depressurized by turning on the second solenoid 61 of the second switching valve 50. However, the first solenoid 41 of the first switching valve 30 is turned on. It is possible to depressurize the third pipe P3. In this case, since the first switching valve 30 is on when the first solenoid 41 is energized, the spool 40 is pulled by the first solenoid 41 to connect the first input port 31 and the first subport 34. The first drain port 32 and the first main port 33 are connected, and the first input port 31 and the first main port 33 are blocked. In the second switching valve 50, since the second solenoid 61 is energized, the second input port 51 and the second subport 54 are connected, and the second drain port 52 and the second main port 53 are connected. At the same time, the second input port 51 and the second sub-port 54 are blocked from the second drain port 52 and the second main port 53. In this case, the lubricating oil in the third pipeline P3 is released to the lubricating oil reservoir 20 through the second main port 53, the second input port 51, the first main port 33, and the first drain port 32, Three lines P3 are depressurized. That is, when one of the first solenoid 41 of the first switching valve 30 and the second solenoid 61 of the second switching valve 50 is turned on, the third pipe P3 is depressurized. For this reason, during the stop mode Mr, the first solenoid 41 or the second solenoid 61 may be turned on while the pump 10 is turned off, so that the third line P3 is depressurized.

Next, in the above example, the case where there are three lubrication pipelines has been described, but the lubrication apparatus S according to the embodiment of the present invention can also be applied to the case of four or more different lubrication pipelines. First, the case where there are four lubrication pipelines will be described. In this case, the lubrication apparatus S includes four lubrication pipelines P, and this pipeline P is a high-order unit having the same configuration as the first switching valve 30 provided above the lowest-order switching valve 50. Connected to the subport 34 of the switching valve 30.
The switching valve 30 is also formed in advance so that the upper attached portion 36 can be attached to and closely attached to the lower attaching portion 37. Therefore, a plurality of the switching valves 30 can be easily connected to the upper side of the lowest switching valve 50.

When one switching valve 30 is added to the lubricating device S that supplies lubricating oil to the three lubrication pipelines to form the four lubrication pipelines P, for example, the second switching valve 50 is first removed. Next, the input port 31 and the drain port 32 of the switching valve 30 to be added are connected to the main port 33 and the drain connection port 35 of the upper switching valve 30 connected to the pump 10, respectively. Further, the main port 33 and the drain connection port 35 of the switching valve 30 to be added are connected to the input port 51 and the drain port 52 of the lowest switching valve 50, respectively. The pipe P is connected to the sub ports 34 and 54 of the switching valves 30 and 50 and the main port 53 of the switching valve 50.
Furthermore, as shown in FIGS. 24 to 26, when the lubricating oil from one pump is individually supplied to five or more pipelines, the lowest switching is performed according to the number of pipelines P. The number of switching valves 30 higher than the valve 50 is added, the pipe line P is connected to the sub-port 34 of the added switching valve 30, and the lubricating oil from the pump 10 is supplied to the plurality of pipe lines P, respectively. To do.

  Further, the controller 70 of the lubrication apparatus S controls on / off of the solenoid 41 of the switching valve 30 added in the subport supply mode Ms in the same manner as described above, and is connected to the subport 34 of the switching valve 30 added. The lubricating oil is also supplied to each of the pipelines P.

When using the lubricating device S, first, the pipes P are connected to the sub-ports 34 and 54 of the switching valves 30 and 50 and the main port 53 of the lowest switching valve 50, respectively. In this case, compared with the case where another pump is provided separately, piping work becomes easy and installation work efficiency is improved.
When lubrication is performed by the lubrication apparatus S, the lubrication apparatus S is controlled by the controller 70 in the stop mode Mr and the subport supply mode, as in the case of the lubrication apparatus S that supplies the lubricating oil to the three lines. Ms and the lowest main port supply mode Mm are set and operated.

  In the stop mode Mr, since the switching valve 30 higher than the lowest switching valve 50 is in the off state when the solenoid 41 is de-energized, each spool 40 is returned to the steady position by the spring 42, The main port 33 is connected, the drain port 32 and the sub port 34 are connected, and the input port 31 and the sub port 34 are blocked. Further, since the lowermost switching valve 50 is in the off state when the solenoid 61 is deenergized, each spool 60 is returned to the steady position by the spring 62, and the input port 51 and the main port 53 are connected to each other, and the drain port is connected. 52 and the subport 54 are connected to each other, and the input port 51 and the subport 54 are cut off from each other. At this time, if the pipes P connected to the sub-ports 34 and 54 of the switching valves 30 and 50 are pressurized, the drains from the sub-ports 34 and 54 to which the pipes P are connected are drained in the same manner as described above. Since the drain ports 32 and 52, the drain connection port 35 of the upper switching valve 30 and the drain port 32 are sequentially passed through the drain port 32 of the uppermost switching valve 30, the sub-port 34, The pipe P connected to 54 is depressurized.

  In the sub port supply mode Ms, any one of the solenoid valves 30a and 50a is turned on to turn the pump 10 on and off, and connected to the sub ports 34 and 54 of any one of the solenoid valves 30a and 50a. Lubricating oil is supplied to the pipeline P. Since the switching valves 30 and 50 that are turned on are on when the solenoids 41 and 61 are energized, the spools 40 and 60 are pulled by the excitation of the solenoids 41 and 61, and the input ports 31 and 51 and the subports 34 and 54 is connected to the drain ports 32 and 52 and the main ports 33 and 53, and the input ports 31 and 51 and the sub-ports 34 and 54 are disconnected from the drain ports 32 and 52 and the main ports 33 and 53. Since the switching valves 30 and 50 other than the switching valves 30 and 50 that are turned on are off when the solenoids 41 and 61 are not energized, the spools 40 and 60 are returned to their normal positions by the springs 42 and 62. The spools 40 and 60 connect the input ports 31 and 51 and the main ports 33 and 53 respectively, connect the drain ports 32 and 52 and the subports 34 and 54, respectively, and input ports 31 and 51 and the subports. 34 and 54 are blocked.

  At this time, the case where the uppermost switching valve 30 is turned on and the case where the lowermost switching valve 50 is turned on are substantially the same as the above-described three systems. At this time, when the switching valve 30 other than the highest switching valve 30 and the lowest switching valve 50 is turned on, the lubricating oil from the pump 10 is higher than the switching valve 30 turned on. In the switching valve 30, the lower switching valve 30 is fed through the input port 31 and the main port 33. Then, in the switching valve 30 that is turned on, the lubricating oil from the upper main port 33 is fed through the input port 31 and the subport 34 to the pipe P connected to the subport 34. At this time, when the pipeline P connected to the main port 53 of the lowest switching valve 50 is pressurized, the lubricating oil in the pipeline P is more than the switching valve 30 turned on. The lower switching valves 30 and 50 pass through the main ports 33 and 53 and the input ports 31 and 51, pass through the main port 33 and the drain port 32 of the switching valve 30 that is turned on, and more than the switching valve 30 that is turned on. Since the upper switching valve 30 passes through the drain connection port 35 and the drain port 32 to the lubricating oil reservoir 20 side, the pipe P connected to the main port 53 is also depressurized. Therefore, a single metering valve Vt that needs to be depressurized can be provided in the pipeline P connected to the main port 53 of the lowermost switching valve 50 instead of the progressive metering valve Vs.

  Thereafter, after a predetermined time has elapsed, the controller 70 changes from the sub-port supply mode Ms to the stop mode Mr, and the pump 10 is operated and the switching valves 30 and 50 are turned off. As a result, since the switching valves 30 and 50 are off when the solenoids 41 and 61 are de-energized, the stop mode Mr is in the above-described state, and the pipe P connected to the sub-ports 34 and 54 is depressurized. The Therefore, since the single metering valve Vt of the pipe line P can be operated, the single metering valve Vt of the pipe line P is operated once and the lubricating oil is discharged even at the next supply of the lubricating oil. Thus, the oil is surely supplied to each part which requires a relatively small amount of oil supply.

  Next, when the controller 70 is set to the lowest main port supply mode Mm and the lubrication apparatus S is operated, all the solenoids 41 and 61 are turned off and the pump 10 is turned on. As a result, in the switching valve 30 higher than the lowest switching valve 50, the spool 40 is returned to the steady position by the spring 42 because the solenoid 41 is not energized, and the spool 40 is connected to the input port 31. The main port 33 is connected, the drain port 32 and the sub port 34 are connected, and the input port 31 and the sub port 34 are blocked. Also in the lowest switching valve 50, since the solenoid 61 is de-energized when it is off, the spool 60 is returned to the steady position by the spring 62, connects the input port 51 and the main port 53, and drain port 52. Are connected to the subport 54 and the input port 51 and the subport 54 are blocked. Therefore, the lubricating oil from the pump 10 passes through the input port 31 and the main port 33 of the upper switching valve 30, passes through the lowest input port 51 and the main port 53, and is connected to the main port 53. To be sent to.

For this reason, the lubrication apparatus S can be set with different intermittent times more finely for each pipeline P by adding a switching valve 30 higher than the lowest switching valve 50, resulting in loss of lubricating oil. As a result, the lubricating oil can be supplied to three or more pipelines P with one pump 10. That is, if the intermittent time is set separately for each pipeline P, the degree of freedom in the way of supplying the lubricating oil is further increased, and the versatility can be improved accordingly.
Further, in the configuration of the lubrication apparatus S, when the progress-type metering valve Vs that requires a relatively large amount is provided in the pipe P connected to the main port 53 of the lowest switching valve 50, this pipe When the lubricating oil is fed to the path P, the lubricating oil between the input port 31 and the main port 33 in the switching valve 30 higher than the lowest switching valve 50 is frequently supplied to the main of the lower switching valve 50. It is fed from the port 53 to the pipeline P. At this time, the lubricating oil between the input port 31 and the main port 33 in the switching valve 30 higher than the lowest switching valve 50 becomes fresh from the lubricating oil reservoir 20, and the lubricating oil is solidified. The effect of being suppressed can also be expected.

In the lubrication apparatus S according to this embodiment, the sub-port 34, the switching valve 30, 50 other than the switching valve 30, 50 that is turned on, regardless of which mode the controller 70 is set to. 54 and the drain ports 32 and 52 are connected, the lubricating oil in the pipe P connected to the sub-ports 34 and 54 of the switching valves 30 and 50 is used except when the solenoid valves 30a and 50a are turned on. Since it is always open to the lubricating oil reservoir 20 side, depressurization is ensured.
Also, the timing of lubrication is determined by the number of operations of the mold (number of shots). Alternatively, when lubrication of each element part on the machine side becomes necessary, for example, the current value of each element part, heat Of course, the sound, load, etc. may be detected by a sensor and determined based on this detection signal.
The switching valve is not limited to the above-described configuration, and any configuration switching valve may be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the injection molding machine which concerns on embodiment of this invention, (a) is a figure which shows the structure of a mold clamping device and an injection apparatus, (b) is a relationship between a lubricating device and a mold clamping device and an injection apparatus. It is a figure shown by. It is a schematic diagram which shows the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a front view which shows the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is side surface sectional drawing which shows the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a reverse view which shows the pump of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a top view which shows the switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a reverse view which shows the switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a top view which shows the 1st switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a front view which shows the 1st switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a reverse view which shows the 1st switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a top view which shows the 2nd switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a front view which shows the 2nd switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a reverse view which shows the 2nd switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a figure which shows the longitudinal cross-section of the 1st and 2nd switching valve of the lubricating device of the injection molding machine which concerns on embodiment of this invention, (a) The state of a stop mode, (b) The state of a 1st subport supply mode It is a figure shown, respectively. It is a figure which shows the longitudinal cross-section of the 1st and 2nd switching valve of the lubricating device of the injection molding machine which concerns on embodiment of this invention, (a) State of 2nd subport supply mode, (b) 2nd main port supply It is a figure which shows the state of a mode, respectively. It is a figure which shows the cross section of the 1st switching valve of the lubricating device of the injection molding machine which concerns on embodiment of this invention, Comprising: (a) AA cross section in Fig.12 (a), (b) Fig.12 (b) ) Is a view showing a cross section taken along line AA. It is a figure which shows the cross section of the 1st switching valve of the lubricating device of the injection molding machine which concerns on embodiment of this invention, Comprising: (a) AA line cross section in Fig.13 (a), (b) Fig.13 (b) ) Is a view showing a cross section taken along line AA. It is a figure which shows the 2nd switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention, Comprising: (a) FIG. 12 (a) BB sectional view, (b) FIG. 12 (b) B- It is a figure which shows a B line cross section, respectively. It is a figure which shows the 2nd switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention, Comprising: (a) The BB cross section in Fig.13 (a), (b) In Fig.13 (b) It is a figure which shows a BB line cross section, respectively. It is a figure which shows the cross section of the 1st switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention, Comprising: (a) CC line cross section in Fig.17 (a), (b) Fig.17 ( It is a figure which respectively shows the CC line cross section in b). It is a figure which shows the 2nd switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention, Comprising: (a) CC line cross section in Fig.18 (a), (b) In FIG.18 (b) It is a figure which shows CC sectional view, respectively. It is a timing chart which shows an example of the operation | movement flow of the switching valve of a lubrication apparatus of the injection molding machine which concerns on embodiment of this invention, a pump, a single metering valve, and a progressive metering valve. In the lubricating device of the injection molding machine which concerns on embodiment of this invention, it is a table | surface figure which shows the example of a relationship between a molding cycle and the intermittent time of each lubrication pipeline. It is a schematic diagram which shows the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a front view which shows the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a perspective view which shows the switching valve of the lubrication apparatus of the injection molding machine which concerns on embodiment of this invention. It is a figure which shows an example of the conventional injection molding machine.

Explanation of symbols

S Lubrication device Mr Stop mode Ms Sub port supply mode Mm Main port supply mode P Lubrication line P1 First line P2 Second line P3 Third line Vt Single metering valve Vs Progressive metering valve 10 Pump 11 Piston 12 Cylinder 13 Drive motor 14 Cam mechanism 15 Mounting portion 16 Discharge port 17 Return port 18 Female screw 20 Lubricating oil storage portion 21 Cartridge 22 Cartridge mounting portion 23 Cover 30 Switching valve (first switching valve)
30a Solenoid valve (first solenoid valve)
31 Input port (first input port)
32 Drain port (1st drain port)
33 Main port (first main port)
34 subport (first subport)
35 Drain connection port 36 Mounted portion 37 Mounted portion 40 Spool 41 Solenoid (first solenoid)
42 Spring 45 Mounting hole 46 Female thread 50 Switching valve (second switching valve)
50a Solenoid valve (second solenoid valve)
51 Input port (second input port)
52 Drain port (second drain port)
53 Main port (second main port)
54 subport (second subport)
56 Mounted portion 60 Spool 61 Solenoid (second solenoid)
62 Spring 65 Mounting hole 66 Cover 70 Controller 100 Bed 110 Clamping device 111 Fixed mold 112 Fixed mold board 113 Movable mold 115 Tie bar 116 Molding mold 117 Movable mold board 117a Support part 118 Toggle mechanism 118a Support base 119 type Tightening ball screw mechanism part 120 Injection device 121 Machine base 122 Cylinder 123 Nozzle 124 Injection screw 125 Injection ball screw mechanism part LL Movable part LM1 of the injection ball screw mechanism part Each joint part of the toggle link of the toggle mechanism (upper)
Each joint part of LM2 toggle mechanism toggle link (bottom)
LM3 Movable part LS1 of mold clamping ball screw mechanism part LS2 sliding part with respect to tie bar of movable mold plate LS2 sliding part with respect to bed at support part of movable mold plate LS3 sliding part with respect to bed at support base of toggle mechanism LS4 Sliding part against bed in machine base 134 Main pipe 135 Oil supply pipe SA, SB, SC, SD, SE, SF Distribution station

Claims (5)

In an injection molding machine comprising a mold clamping device and an injection device on a bed and a lubrication device for supplying lubricating oil to a required lubrication location of the mold clamping device and the injection device,
The lubrication device is provided in parallel with each other, and three or more lubrication pipelines for feeding the lubrication oil to required lubrication locations of the mold clamping device and the injection device, and the lubrication oil is fed to the plurality of lubrication pipelines A pump, and a switching valve that is connected to the pump and is switched so that the lubricating oil from the pump can be supplied to any one of the plurality of lubricating pipes ;
Each of the lubrication pipelines has a valve for discharging the lubricating oil, a distribution station that distributes the lubricating oil, a main pipe that is piped from the pump to the distribution station, and from the valve of the distribution station to each of the lubrication points. A lubrication pipe that is piped, and a distribution station for each of the lubrication pipelines is provided on one side of the mold clamping device and the injection device.
Among the plurality of lubrication pipelines, at least one lubrication pipeline is constituted by a depressurization pipeline that is supplied with lubricating oil and needs to be depressurized, and at least one other lubrication pipeline is fed with lubricating oil and removed. Consists of non-depressurized pipelines that do not require pressure,
In the lubrication apparatus, the apparatus includes a plurality of switching valves that are sequentially connected to the pump and connected to be switched to supply lubricating oil individually to the lubrication pipelines.
An input port connected to the discharge port side of the pump, a drain port that opens to the lubricating oil reservoir side, and a plurality of pipelines, the switching valve being higher than the lowest switching valve among the plurality of switching valves Is connected to the main port connected to the input port of the lower switching valve on one side of the pipe, the sub-port connected to any one of the other piping, and the drain port of the lower switching valve Has a drain connection port that communicates with the drain port, and connects the input port to the sub port when energized and shuts off the drain port, the drain connection port, and the main port from the input port and the sub port. When off, connect the input port and main port, connect the drain port and sub port, and Constituted by a solenoid valve for blocking the input port and the sub-port,
The lowermost switching valve is connected to any one of the input port connected to the discharge port side of the pump, the drain port opened to the lubricating oil reservoir, and the plurality of pipelines It has a sub port connected to the main port and one of the other pipes, and when the power is turned on, the input port and the sub port are connected and the drain port and the main port are disconnected from the input port and the sub port. An injection molding characterized by comprising a solenoid valve that connects the input port and the main port, and connects the drain port and the subport when the power is off, and disconnects the input port and the subport. Machine.   As the depressurization conduit, a valve that feeds lubricating oil and is operated by pressurizing and depressurizing the lubricating oil to discharge the lubricating oil is provided, and a first pressure that requires depressurization for the operation of the valve is provided. The system is provided with two systems of depressurization lines composed of a depressurization line and a second depressurization line, and as the non-depressurization line, a valve for supplying lubricating oil and discharging the lubricating oil by pressurizing the lubricating oil is piped. The injection molding machine according to claim 1, further comprising a single non-depressurization line that does not require depressurization for the operation of the valve.   The drain valve and the main port are connected when the solenoid valve of the switching valve above the lowest switching valve is energized and turned on, and the solenoid valve of the lowest switching valve is connected when the energization is turned on. The injection molding machine according to claim 1 or 2, wherein the drain port and the main port are connected.   The pump operation and stop mode in which all solenoid valves are turned off, and any one of the solenoid valves is turned on to turn the pump on and off to the subport of any one of the solenoid valves. A sub-port supply mode for supplying lubricating oil to the connected pipe line, and a pipe connected to the main port of the lowermost switching valve by turning all the solenoid valves off and turning on / off the pump. The injection molding machine according to any one of claims 1 to 3, further comprising a controller that can be set to any one of a lowest main port supply mode for supplying lubricating oil to the road.   The injection molding machine according to any one of claims 1 to 4, wherein the plurality of switching valves are detachable from the pump.

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