Resin cutting equipment and injection molding machines

Abstract

To remove resin dripping from the tip of the nozzle without leaving residual resin at the tip of the nozzle.SOLUTION: The resin cutting device 300 is a device for cutting resin purged from nozzles provided in injection molding machines, and is equipped with a resin removal plate 200 with apertures 210 that can contact nozzle tips, and a drive unit 310 for moving the resin removal plate.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a resin cutting device, an injection molding machine, and a resin cutting technique. [Background technology]

[0002] JP 2017-71115 A (Patent Document 1) describes a technique for purging old injection material remaining inside an injection molding machine prior to a molding cycle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-71115 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, molded products are manufactured through a molding cycle in which an injection molding machine is operated continuously. However, the molding cycle may be interrupted, in which case molten resin remains inside the injection molding machine. At this time, the remaining resin may deteriorate due to heat, etc., so it is difficult to restart the molding cycle with the resin remaining.

[0005] Furthermore, when attempting to manufacture a new molded product using a resin that is different in material, color, properties, etc. from the resin that has been used up until now, it becomes difficult to manufacture a molded product using the new resin if the resin that has been used up until now remains inside the injection molding machine.

[0006] Therefore, in the above-mentioned case, a purge is performed prior to the molding cycle to discharge the old resin remaining inside the injection molding machine. In this purge, the resin material is discharged from the nozzle of the injection molding machine, but at this time, the resin that has dripped out may remain at the tip of the nozzle. In this state, it is difficult to manufacture a new molded product, so it is necessary to remove the resin that has dripped out from the tip of the nozzle.

[0007] In this regard, the current situation is that the resin dripping from the tip of the nozzle cannot be completely removed with the conventional technology, and the resin remains at the tip of the nozzle. That is, an effective technology for removing the resin dripping from the tip of the nozzle is required. In other words, a method for removing the dripping resin by purging is desired. [Means for solving the problem]

[0008] In one embodiment, the resin cutting device is a device that cuts resin purged from a nozzle equipped on an injection molding machine, and includes a resin removal plate with an opening that can contact the tip of the nozzle, and a drive unit for moving the resin removal plate.

[0009] An injection molding machine in one embodiment has a function of purging resin from a nozzle. Here, the injection molding machine includes a resin cutting unit that cuts the purged resin from the tip of the nozzle, and a control unit that controls the resin cutting unit. In this case, the resin cutting unit has a resin removal plate provided with an opening that can be contacted with the tip of the nozzle, and a drive unit for moving the resin removal plate. Then, the control unit controls the resin cutting unit so that the resin purged from the tip of the nozzle is cut by moving the resin removal plate while the tip of the nozzle is in contact with the opening.

[0010] In one embodiment, the resin cutting method is a method of cutting purged resin, and includes the steps of contacting the tip of a nozzle with an opening provided in a resin removal plate, purging resin from the tip of the nozzle, and moving the resin removal plate. Effect of the Invention

[0011] According to one embodiment, it is possible to remove the resin dripping from the tip of the nozzle without leaving any resin at the tip of the nozzle. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of an injection molding machine. [Diagram 2] FIG. 2 is a diagram illustrating the operation of an injection molding machine. [Diagram 3] 3 is a diagram illustrating the operation of the injection molding machine following FIG. 2. [Figure 4] 4 is a diagram illustrating the operation of the injection molding machine following FIG. 3. [Diagram 5] 5 is a diagram illustrating the operation of the injection molding machine following FIG. 4. [Figure 6] 6 is a diagram illustrating the operation of the injection molding machine following FIG. 5. [Figure 7] 7 is a diagram illustrating the operation of the injection molding machine following FIG. 6. [Figure 8] 11A to 11C are diagrams illustrating a method for removing resin dripping from the tip of a nozzle. [Figure 9] FIG. 1 is a diagram illustrating a related art. [Figure 10] 4 is a plan view showing a configuration of a resin removal plate in the embodiment. FIG. [Figure 11] FIG. 2 is a diagram showing a schematic configuration of a resin cutting device. [Figure 12] 1 is a flowchart illustrating a technical idea in an embodiment. [Figure 13] 11A to 11C are diagrams illustrating a resin cutting operation. [Figure 14] 14 is a view for explaining the resin cutting operation following FIG. 13. FIG. [Figure 15] 15 is a view for explaining the resin cutting operation following FIG. 14. [Figure 16] 16 is a diagram illustrating the resin cutting operation following FIG. 15. FIG. [Figure 17] 17 is a view for explaining the resin cutting operation following FIG. 16. FIG. [Figure 18] 18 is a view illustrating the resin cutting operation following FIG. 17. [Figure 19] 19 is a diagram for explaining an alternative operation of FIG. 18. [Figure 20] 13 is a diagram showing a schematic configuration example in which a resin cutting device is attached to an injection molding machine so that a resin removal plate is disposed outside a fixed platen. FIG. [Figure 21] 13 is a diagram showing a schematic configuration example in which a resin cutting device is attached to an injection molding machine so that a resin removal plate is disposed inside a fixed platen; FIG. [Figure 22] 13A and 13B are diagrams showing an example of a configuration in which a plurality of resin removal plates are attached; [Figure 23] 13 is a diagram showing a schematic configuration of a resin removal plate in Modification 1. FIG. [Figure 24] 13 is a diagram showing the state in which the tip of the nozzle is brought into contact with the fitting shape of the opening so as to fit the fitting shape of the opening. FIG. [Diagram 25] 2 is a block diagram showing an example of a control unit configuration of an injection molding machine equipped with a resin cutting device. FIG. [Figure 26] 13 is a block diagram showing another example of the configuration of the control unit of the injection molding machine to which the resin cutting device is attached. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] In all the drawings for explaining the embodiments, the same members are generally designated by the same reference numerals, and the repeated explanations thereof will be omitted. In addition, hatching may be applied even to plan views in order to make the drawings easier to understand.

[0014] <Injection molding machine configuration> FIG. 1 is a diagram showing an example of the configuration of an injection molding machine 100.

[0015] In FIG. 1, an injection molding machine 100 is made up of a mold clamping unit 1 and an injection unit 2.

[0016] <<Configuration of the mold clamping unit>> The mold clamping device 1 has a movable platen 10 and a fixed platen 11, and is configured to be able to variably control the distance between the movable platen 10 and the fixed platen 11. A movable die (mold) 12 and a fixed die (mold) 13 can be arranged between the movable platen 10 and the fixed platen 11. As a result, for example, by variably controlling the distance between the movable platen 10 and the fixed platen 11 by the mold clamping device 1, the distance between the movable die 12 and the fixed die 13 can be shortened to perform "mold closing" and the distance between the movable die 12 and the fixed die 13 can be increased to perform "mold opening." At this time, when the movable die 12 and the fixed die 13 are "mold closed," a sealed space is formed between the movable die 12 and the fixed die 13, and a molded product is formed by pouring resin into this sealed space. In particular, in the injection molding machine 100 shown in Fig. 1, when the movable mold 12 and the fixed mold 13 are "closed", a sealed space is formed, and a molded product is formed by pouring resin into this sealed space. In this manner, the mold clamping device 1 is constructed.

[0017] <<Injection unit configuration>> Next, as shown in FIG. 1, an injection device 2 that extrudes resin is connected to the fixed platen 11, and the resin extruded from the injection device 2 flows through the fixed platen 11 into an airtight space formed by "mold closing" between the movable mold 12 and the fixed mold 13.

[0018] The injection device 2 has a hopper 21 for putting the resin raw material therein, and a cylinder 22. When the resin raw material is put into the hopper 21, the resin raw material is kneaded by a rotatable screw 23 arranged inside the cylinder 22. At this time, a heater 24 is arranged around the cylinder 22, and the resin raw material put into the cylinder 22 is kneaded by the screw 23 while being heated by the heater 24, to become molten resin 25. A nozzle 26 is provided at the tip of the cylinder 22. In this manner, the injection device 2 is constructed.

[0019] <Operation of injection molding machine> Next, the operation of the injection molding machine 100 will be described.

[0020] First, the movable platen 10 of the mold clamping unit 1 is moved from the state shown in Fig. 1 to that shown in Fig. 2. This brings the movable mold 12 into contact with the fixed mold 13, thereby "closing the mold." At this time, a large force is applied from the movable platen 10 in the direction of the arrow in Fig. 2 so that no gap is created between the movable mold 12 and the fixed mold 13. Meanwhile, in the injection unit 2, the state shown in Fig. 1 is maintained, and the molten resin 25 is between the nozzle 26 and the screw 23. In other words, the molten resin 25 is not injected into the sealed space 30 between the movable mold 12 and the fixed mold 13.

[0021] Next, as shown in Fig. 3, from the state shown in Fig. 2, a large force is applied to move the screw 23 leftward, i.e., in the forward direction. At this time, the screw 23 is not rotated. As a result, the molten resin 25 is injected from the tip of the nozzle 26 into the sealed space 30 between the movable mold 12 and the fixed mold 13. In the technical field of injection molding, the injection of the molten resin 25 into the sealed space 30 is called "injection." Also, the sealed space 30 between the movable mold 12 and the fixed mold 13 is sometimes called the "cavity."

[0022] Thereafter, as shown in FIG. 4, after the molten resin 25 is injected, the screw 23 maintains a state of applying pressure to the sealed space 30. This state is called a "pressure-holding state", and the movable die 12 and the fixed die 13 are cooled while maintaining this pressure-holding state. Then, as shown in FIG. 4, the resin raw material 40 is filled into the hopper 21. Here, when the movable die 12 and the fixed die 13 are cooled, the screw 23 is rotated to fill the space between the nozzle 26 and the screw 23 with the molten resin 25 for the next injection. Specifically, when the screw 23 is rotated, the resin raw material 40 supplied from the hopper 21 is melted in the cylinder 22 of the injection device 2 and advances in the forward direction.

[0023] As a result, as shown in FIG. 5, the molten resin 25 accumulates between the nozzle 26 and the cylinder 22. Then, the screw 23 is pushed backward by the reaction and returns to the state before injection. At this time, the process of moving the screw 23 backward while sending the molten resin 25 forward so that the molten resin 25 can be injected is called "metering". A heater 24 for heating the cylinder 22 is arranged around the cylinder 22. The heater 24 is arranged so as to surround the cylinder 22, and the resin raw material 40 supplied from the hopper 21 is heated and melted by the heat from the heater 24 and the shear heat generated by the rotation of the screw 23, to become the molten resin 25.

[0024] Next, the movable die 12 and the fixed die 13 are cooled to a temperature equal to or lower than the temperature at which the molten resin 25 filled in the sealed space 30 solidifies. Thereafter, as shown in FIG. 6, the mold clamping device 1 is operated to "open" the movable die 12 and the fixed die 13. When the movable die 12 and the fixed die 13 are thus "opened", the molded product 50 is peeled off from the fixed die 13 and ejected from the movable die 12. This molded product 50 becomes the product molded by the injection molding machine 100.

[0025] Next, as shown in Fig. 7, the molded article 50 is removed from the movable mold 12. By repeating this series of steps (Figs. 2 to 7), molded articles 50 of the same shape can be continuously manufactured. It can be seen that by repeatedly operating the injection molding machine 100 in the above manner, molded articles 50 can be mass-produced.

[0026] <Necessity of purging> As described above, the molded product 50 is manufactured by a molding cycle in which the injection molding machine 100 is continuously operated. However, the operation of the injection molding machine 100 may be stopped to interrupt the molding cycle due to cleaning of the injection molding machine 100, replacement of resin, replacement of the molds (movable mold 12 and fixed mold 13) to be mounted on the mold clamping device 1, etc. In this case, molten resin remains inside the injection molding machine 100. At this time, since the remaining resin may deteriorate due to heat, etc., it is difficult to resume the molding cycle with the resin remaining. Furthermore, when a new molded product 50 is to be manufactured using a resin with a different material, color, property, etc. from the resin that has been used so far, if the resin that has been used so far remains inside the injection molding machine 100, it is difficult to manufacture the molded product 50 using the new resin.

[0027] Therefore, prior to the molding cycle, a process must be performed to discharge the old resin remaining inside the injection molding machine 100. This process is called "purging." In this purging, the screw 23 is rotated to discharge the resin from the nozzle 26 of the injection molding machine 100. At this time, some resin may drip from the tip of the nozzle 26. In this state, it is difficult to manufacture a new molded product, so the resin dripping from the tip of the nozzle 26 must be removed.

[0028] <Description of Related Art> Here, for example, as shown in Fig. 8, after purging, a person uses a "scraper 70" to remove the resin 60 dripping from the tip of the nozzle 26. However, with this method, there is a risk that the resin 60 dripping from the tip of the nozzle 26 by purging cannot be sufficiently removed. Therefore, as a technique for removing the resin 60 dripping from the tip of the nozzle 26 by purging, for example, the related technique shown below is available.

[0029] Here, the term "related art" as used herein refers to art that is not publicly known, but has problems that the inventors have found, and is a technology that is the premise of the present invention.

[0030] FIG. 9 is a diagram for explaining the related art. In the related art shown in FIG. 9, a resin removal plate 80 moving from above the tip of the nozzle 26 is brought into contact with the tip of the nozzle 26 to remove the resin 60 dripping from the tip of the nozzle 26 by purging. However, even in this related art, it is currently not possible to sufficiently prevent a part of the resin 60 from remaining at the tip of the nozzle 26 after the resin 60 is removed by the resin removal plate 80. Therefore, in the related art, there is room for improvement in terms of sufficiently removing the resin 60 dripping from the tip of the nozzle 26 by purging. Therefore, in this embodiment, a device is implemented to overcome the room for improvement that exists in the related art. Below, the technical idea of ​​this embodiment in which this device is implemented will be described.

[0031] <Configuration of resin removal plate> FIG. 10 is a plan view showing the configuration of resin removal plate 200 in this embodiment.

[0032] 10, resin removal plate 200 has a rectangular shape and is provided with an opening 210 therein. Resin removal plate 200 configured in this manner has a function of cutting off resin dripping from the tip of a nozzle by purging. The opening 210 provided in resin removal plate 200 is configured so that the tip of a nozzle can come into contact with it.

[0033] <Configuration of resin cutting device> Next, a resin cutting device 300 that uses the above-mentioned resin removing plate 200 to cut the resin purged from a nozzle provided in an injection molding machine will be described.

[0034] FIG. 11 is a diagram showing a schematic configuration of the resin cutting device 300. As shown in FIG.

[0035] 11, resin cutting device 300 has resin removal plate 200 provided with opening 210 that can contact the tip of the nozzle, and drive unit 310 for moving resin removal plate 200. For example, as shown in Fig. 11, drive unit 310 is composed of a motor, and resin removal plate 200 is connected to this motor. As a result, resin removal plate 200 is configured to be movable in the up and down directions by drive unit 310 composed of a motor.

[0036] <Technical Concept of the Embodiment> The technical idea of ​​this embodiment is realized by operating the above-mentioned resin cutting device 300. This technical idea will be described below.

[0037] FIG. 12 is a flowchart illustrating the technical idea of ​​this embodiment.

[0038] In Fig. 12, first, after interrupting the molding cycle of the injection molding machine, the nozzle in contact with the fixed platen is retreated (S101). Specifically, as shown in Fig. 13, the nozzle 26 is moved in the direction of the arrow. At this time, a resin removal plate 200 is disposed above the nozzle 26, and an opening 210 is provided in the resin removal plate 200.

[0039] 12, the resin removal plate is lowered (S102). Specifically, as shown in FIG 14, the resin removal plate 200 having an opening 210 is moved in the direction of the arrow.

[0040] Next, in Fig. 12, the tip of the nozzle is brought into contact with an opening provided in a resin removal plate (S103). Specifically, as shown in Fig. 15, the nozzle 26 is moved in the direction of the arrow, so that the tip of the nozzle 26 is brought into contact with an opening 210 provided in a resin removal plate 200, as shown in Fig. 16.

[0041] Thereafter, in Fig. 12, purging is performed (S104). Specifically, as shown in Fig. 17, when purging is performed, resin 60 discharged by purging drips out from the tip of nozzle 26. At this time, in this embodiment, since the tip of nozzle 26 is in contact with opening 210 provided in resin removal plate 200, resin 60 dripping out from the tip of nozzle 26 is discharged to the outside through the inside of opening 210.

[0042] Next, in Fig. 12, the resin removal plate is raised (S105). Specifically, as shown in Fig. 18, the resin 60 dripping from the tip of the nozzle 26 is cut by moving the opening 210 in the upward direction. In other words, by moving the resin removal plate 200 in a direction parallel to the fixed platen, the resin 60 dripping from the tip of the nozzle 26 can be cut. As a result, according to the technical idea of ​​this embodiment, the resin 60 dripping from the tip of the nozzle 26 by purging can be firmly removed from the tip of the nozzle 26.

[0043] 18 shows a configuration example in which the resin 60 dripping from the tip of the nozzle 26 is cut by moving the opening 210 upward. However, the technical idea of ​​the present embodiment is not limited to this, and for example, as shown in FIG 19, the resin 60 dripping from the tip of the nozzle 26 may be cut by moving the opening 210 in the horizontal direction (arrow direction).

[0044] The technical idea in this embodiment is to provide an opening in the resin removal plate, bring the tip of the nozzle into contact with the opening, and then cut the resin purged from the tip of the nozzle by moving the resin removal plate while the tip of the nozzle is in contact with the opening. The essence of this idea is to use the opening in contact with the tip of the nozzle as a cutter for cutting the resin, which provides a remarkable effect of reliably removing the resin dripping from the tip of the nozzle. In other words, according to this idea, it is possible to effectively prevent the resin dripping from the tip of the nozzle by purging from remaining at the tip of the nozzle.

[0045] Furthermore, this technical concept is also devised to reliably remove the resin dripping from the tip of the nozzle by utilizing the weight of the resin dripping from the tip of the nozzle.

[0046] This point will be explained below.

[0047] For example, if we consider a configuration in which the resin purged from the tip of the nozzle is cut by vertical (upward) movement of a resin removal plate while the tip of the nozzle is in contact with the opening, the opening in the resin removal plate moves upward, while the dripping resin moves downward under its own weight. In this way, the movement direction of the opening (upward) and the movement direction of the dripping resin (downward) are opposite, which makes it easier for the opening to cut the resin.

[0048] Also, for example, if we consider a configuration in which the resin purged from the tip of the nozzle is cut by horizontally (laterally) moving the resin removal plate while the tip of the nozzle is in contact with the opening, the opening in the resin removal plate moves horizontally, while the dripping resin moves downward by its own weight. In this way, the movement direction of the opening (horizontally) and the movement direction of the dripping resin (downward) are different directions, which makes it easier for the opening to cut the resin.

[0049] In other words, the essence of this ingenuity is that, on the premise that the resin is purged from the tip of the nozzle while the tip of the nozzle is in contact with the opening, the movement direction of the opening is then moved in a direction different from the downward direction in which the weight of the dripping resin is applied. This is because, when the movement direction of the opening is moved in a direction different from the downward direction in which the weight of the dripping resin is applied, the resin is more easily cut by the opening. In this respect, it is desirable that the movement direction of the resin removal plate provided with the opening is a direction different from the downward direction, and may be a horizontal direction or an upward direction. In particular, when the movement direction of the resin removal plate provided with the opening is set to the upward direction, it is desirable because it is the exact opposite direction to the downward direction, which is the movement direction of the dripping resin due to its own weight, and therefore it is more easily cut by the opening.

[0050] To sum up the above, the technical idea of ​​this embodiment has its main essence in (1) the first ingenuity of cutting the resin purged from the tip of the nozzle by moving the resin removal plate (opening) while the tip of the nozzle is in contact with the opening. In addition to the main essence, this technical idea has a secondary ingenuity, which can be said to be (2) the second ingenuity of moving the opening in a direction different from the downward direction to which the weight of the dripping resin is applied.

[0051] <Attachment structure of resin removal plate> Next, the resin cutting device 300 is attached to the injection molding machine 100. An example of a configuration for attaching the resin cutting device 300 to the injection molding machine 100 will be described.

[0052] 20 is a schematic diagram showing an example of a configuration in which a resin cutting device 300 is attached to an injection molding machine so that a resin removal plate 200 is disposed outside a cone-shaped hole in the fixed platen 11 into which the tip of the nozzle is inserted. In this configuration, the resin cut by the opening 210 of the resin removal plate 200 falls to the outside of the fixed platen 11, so that the effort of removing the cut resin from inside the fixed platen 11 can be eliminated.

[0053] 21 is a schematic diagram showing an example of a configuration in which a resin cutting device 300 is attached to an injection molding machine so that a resin removal plate 200 is disposed inside a cone-shaped hole in a fixed platen 11 into which a tip of a nozzle is inserted. In this configuration, it is possible to shorten the distance that the nozzle is moved to bring the nozzle into contact with an opening 210 of the resin removal plate 200. As a result, the configuration shown in FIG. 21 has the advantage of being able to shorten the time required to cut the resin purged from the tip of the nozzle with the tip of the nozzle in contact with the opening 210.

[0054] Fig. 22 is a diagram showing a configuration example for attaching a plurality of resin removal plates 200. In Fig. 22, the plurality of resin removal plates 200 include a resin removal plate 200A arranged inside a cone-shaped hole in the fixed platen 11 into which the tip of the nozzle is inserted, and a resin removal plate 200B arranged outside the cone-shaped hole in the fixed platen 11 into which the tip of the nozzle is inserted.

[0055] Here, resin removal plate 200A is provided with opening 210A, and resin removal plate 200A with opening 210A provided therein can be moved up and down by drive unit 310A consisting of a motor. Similarly, resin removal plate 200B is provided with opening 210B, and resin removal plate 200B with opening 210B provided therein can be moved up and down by drive unit 310B consisting of a motor.

[0056] In the configuration shown in FIG. 22, for example, resin dripping after purging can be removed by resin removal plate 200B, and then resin dripping from the nozzle while the nozzle is being advanced can be removed by resin removal plate 200A.

[0057] In addition, in the configuration shown in Figure 22, it is possible to remove the purged and dripping resin with resin removal plate 200A after injection molding without retracting the nozzle to resin removal plate 200B, thereby shortening the retraction distance of the nozzle.

[0058] 22, a first purge can be performed with the tip of the nozzle in contact with resin removal plate 200A, and a second purge can be performed with the tip of the nozzle in contact with resin removal plate 200B. As a result, the configuration shown in FIG. 22 allows multiple (two) purges to be performed, so that the resin remaining in the cylinder of the injection molding machine can be reliably discharged.

[0059] <Variation 1> Next, a first modified example of the embodiment will be described.

[0060] FIG. 23 is a diagram showing a schematic configuration of a resin removal plate 200 in Modification 1. In FIG. 23, the resin removal plate 200 is provided with an opening 210 having a fitting shape 220. According to the resin removal plate 200 configured in this manner, for example, as shown in FIG. 24, the tip of the nozzle 26 can be brought into contact with the fitting shape 220 of the opening 210 so as to fit the fitting shape 220. That is, the fitting shape 220 of the opening 210 is processed into a shape that fits the tip of the nozzle 26. As a result, according to this Modification 1, it is possible to obtain an advantage that the resin purged from the tip of the nozzle 26 can be easily cut by moving the resin removal plate 200 while the tip of the nozzle 26 is fitted into the fitting shape 220 of the opening 210.

[0061] <Variation 2> Next, a second modification of the embodiment will be described.

[0062] For example, when cutting the purged resin by moving the resin removal plate 200, the resin removal plate 200 is easier to cut if it is heated. In consideration of this, the resin cutting device 300 may be configured to have a heating unit for heating the resin removal plate 200. Here, an example of the heating unit is a heater. In this case, the resin removal plate 200 can be heated by adopting, for example, a configuration in which the resin removal plate 200 is directly heated by a heater or a configuration in which heat from a heater is applied to the resin removal plate 200 as indirect hot air.

[0063] From the viewpoint of facilitating heating, it is desirable for resin removal plate 200 to be made of a material with high thermal conductivity, such as a metal material.

[0064] <Modification 3> Next, a third modification of the embodiment will be described.

[0065] Although the resin cutting device 300 is attached to the injection molding machine 100, the operation of cutting the purged resin by the resin cutting device 300 can be performed by a control unit independent of the injection molding machine 100. In other words, the operation of the resin cutting device 300 can be provided independently of the control unit that controls the operation of the injection molding machine 100.

[0066] For example, FIG. 25 is a block diagram showing an example of a control unit configuration of an injection molding machine 100 to which a resin cutting device 300 is attached. In FIG. 25, the injection molding machine 100 has a control unit 110, and this control unit 110 is configured to control, for example, the operation of the molding cycle shown in FIG. 1 to FIG. 7. On the other hand, in FIG. 25, the resin cutting device 300 is attached to the injection molding machine 100, and this resin cutting device 300 has a control unit 230 different from the control unit 110. This control unit 230 is configured to control, for example, the resin cutting operation shown in FIG. 12 to FIG. 19, and is provided independently and separately from the control unit 110 that controls the operation of the molding cycle in the injection molding machine 100. In this way, the technical idea of ​​this embodiment can be realized by the control unit configuration shown in FIG. 25.

[0067] However, the control unit configuration that embodies the technical idea of ​​this embodiment is not limited to the control unit configuration shown in Fig. 25, and can be realized, for example, by the control unit configuration shown in Fig. 26. In Fig. 26, the injection molding machine 100 has a control unit 110, and this control unit 110 is configured to control, for example, the operation of the molding cycle and also to control the resin cutting operation by the resin cutting device 300 (resin cutting unit) attached to the injection molding machine 100. In other words, the control unit 110 is configured to control both the injection molding machine 100 and the resin cutting device 300 (resin cutting unit). In this way, the technical idea of ​​this embodiment can also be realized by the control unit configuration shown in Fig. 26.

[0068] The invention made by the inventor has been specifically described above based on the embodiment thereof. However, it goes without saying that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. [Explanation of symbols]

[0069] 26 Nozzles 100 injection molding machine 110 Control section 200 Resin removal board 210 Opening 230 Control Unit 300 Resin cutting equipment 310 Drive unit

Claims

1. A resin cutting device that cuts resin purged from a nozzle of an injection molding machine, comprising: a resin removal plate having an opening that can come into contact with the tip of the nozzle; A drive unit for moving the resin removal plate; Equipped with The resin cutting device has a plurality of the resin removal plates, The resin removal plates include: a first resin removal plate that can be arranged outside a hole in a fixed platen through which the nozzle is inserted; A second resin removal plate that can be placed inside the hole; A resin cutting device.

2. An injection molding machine comprising the resin cutting device according to claim 1.

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