Injection molding apparatus and method for executing injection molding apparatus

Abstract

The invention relates to an injection molding apparatus and an execution method of the injection molding apparatus. The injection molding device is provided with: a plasticization unit; a metering and injecting part which is arranged between the plasticizing part and the forming die and is used for metering the plasticizing material and injecting the metered plasticizing material into the forming die; a first drive unit that changes the relative positions of the plasticizing unit and the metering injection unit; a pressure detection unit for detecting the pressure in the metering injection unit; and a control unit which changes the volume of the internal space in which the plasticized material is stored in accordance with a change in the relative position with respect to the plasticizing unit, and which performs at least one of a metering operation and an injection operation in accordance with the pressure, the metering operation is an operation in which the plasticizing part and the metering injection part are moved in directions in which the plasticizing part and the metering injection part are separated from each other by controlling the first driving part so that the plasticizing material is metered by the metering injection part. The injection operation is an operation of injecting the metered plasticized material into the molding die by controlling the first drive unit to move the plasticization unit and the metered injection unit in a direction in which the plasticization unit and the metered injection unit approach each other.

Description

[0001] This application is a divisional application of the Chinese application with application number 202110656811.7 filed on June 11, 2021 and invention name “Injection molding device and method for executing injection molding device”. Technical Field

[0002] The invention relates to an injection molding device and an execution method of the injection molding device. Background Art

[0003] Regarding injection molding apparatus, for example, Patent Document 1 discloses an injection molding apparatus including: a plasticizing unit for generating molten resin, a metal mold, and an auxiliary cylinder that moves in conjunction with the movement of the metal mold. The auxiliary cylinder is filled with molten resin for injection into the metal mold by the plasticizing unit.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 8-132492

[0005] In the device described in Patent Document 1, the auxiliary cylinder is moved away from the plasticizing unit, and the molten resin is supplied from the plasticizing unit to the auxiliary cylinder and metered. In addition, the auxiliary cylinder is moved close to the plasticizing unit, and the molten resin is injected from the auxiliary cylinder into the metal mold. In an injection molding device having a component that performs injection and metering by relative movement with respect to the plasticizing unit in the above manner, it is desired to further improve the molding quality. Summary of the invention

[0006] According to a first aspect of the present invention, an injection molding device is provided. The injection molding device is characterized in that it comprises: a plasticizing part that plasticizes a material to generate a plasticized material; a metering injection part that is arranged between the plasticizing part and a molding die, meters the plasticized material, and injects the measured plasticized material into the molding die; a first driving part that changes the relative position of the plasticizing part and the metering injection part; a pressure detecting part that detects the pressure in the metering injection part; and a control part that changes the volume of the internal space of the metering injection part storing the plasticized material according to the change of the relative position of the metering injection part and the plasticizing part, and the control part performs at least one of a metering operation and an injection operation according to the pressure, wherein the metering operation is an operation in which the plasticizing part and the metering injection part are moved in a direction away from each other by controlling the first driving part, so that the metering injection part meters the plasticized material, and the injection operation is an operation in which the plasticizing part and the metering injection part are moved in a direction close to each other by controlling the first driving part, so that the measured plasticized material is injected into the molding die.

[0007] According to a second aspect of the present invention, there is provided an execution method of an injection molding device, the injection molding device comprising: a plasticizing portion for plasticizing a material to generate a plasticized material; a metering injection portion for being arranged between the plasticizing portion and a molding die, for metering the plasticized material, and injecting the metered plasticized material into the molding die; a first driving portion for changing the relative position of the plasticizing portion and the metering injection portion; and a pressure detecting portion for detecting the pressure in the metering injection portion, wherein the volume of a space for storing the plasticized material in the metering injection portion changes according to the change in the relative position of the metering injection portion and the plasticizing portion, the execution method of the injection molding device comprising: a metering step for controlling the first driving portion to move the plasticizing portion and the metering injection portion in a direction away from each other, so that the metering injection portion meters the plasticized material; and an injection step for controlling the first driving portion to move the plasticizing portion and the metering injection portion in a direction approaching each other, so that the metered plasticized material is injected into the molding die, and at least one of the metering step and the injection step is executed according to the pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a diagram showing a schematic configuration of an injection molding device in the first embodiment.

[0009] Figure 2 It is a three-dimensional diagram of the screw.

[0010] Figure 3 It is an explanatory diagram showing the structure of the facing surface side of the drum.

[0011] Figure 4 This is a flowchart of the injection molding process in the first embodiment.

[0012] Figure 5 It is a figure which shows the state which carried out mold clamping.

[0013] Figure 6 This is a graph showing an example of pressure changes during injection operation.

[0014] Figure 7 : is a figure which shows the state which completed the injection operation.

[0015] Figure 8 It is a diagram showing a state where the metering operation is completed.

[0016] Fig. 9 This is a diagram showing a state where the mold is opened.

[0017] Fig.10 This is a flowchart of the injection molding process in the second embodiment.

[0018] Fig.11This is a graph showing an example of pressure changes during metering operation.

[0019] Fig.12 It is a diagram showing a schematic configuration of an injection molding device in a third embodiment.

[0020] Fig.13 It is a diagram showing the situation when the metering operation is performed.

[0021] Fig.14 It is a diagram showing the situation when the injection operation is performed.

[0022] Fig.15 It is a diagram showing a schematic configuration of an injection molding apparatus in a fourth embodiment.

[0023] Fig.16 It is a diagram showing a schematic configuration of an injection molding apparatus in a fifth embodiment.

[0024] Fig.17 It is a diagram showing a schematic configuration of an injection molding apparatus in a sixth embodiment.

[0025] Description of Reference Numerals

[0026] 10···Injection molding device, 20···Molding mold, 21···First mold, 22···Second mold, 23···Cavity, 24···Slide valve, 25···Stopper, 26···Counterweight, 100···Plasticizing portion, 110···Casing, 130···Screw, 132···Groove forming surface, 133···Side, 134···Material introduction port, 135···Groove portion, 136···Raised strip portion, 137···Central portion, 140···Roller, 142···Opposing surface, 144···Guide groove, 146···Communication hole, 148···Heater, 150···Nozzle, 152···Check valve, 160 ···First reducer, 170···Screw drive motor, 200···Measuring injection unit, 210···Storage chamber, 220···Pressure detection unit, 230···Temperature detection unit, 240···Heating unit, 300···First drive unit, 300c···First drive unit, 310···Ball screw, 320···Second reducer, 330···Rod, 350c···Second drive unit, 351···Fixed table, 400···Pull rod, 410···First force applying unit, 420···Second force applying unit, 500···Control unit, 510···Notification unit, 600···Linear guide rail, 700···Clamp. DETAILED DESCRIPTION

[0027] A. First Implementation Method:

[0028] Figure 11 is a diagram showing a schematic structure of an injection molding device 10 in the first embodiment. Figure 1 , arrows along mutually orthogonal X, Y, and Z directions are shown. The X, Y, and Z directions are directions along the X, Y, and Z axes, which are three mutually orthogonal spatial axes, and include a positive direction along one side of the X, Y, and Z axes, and a negative direction as the opposite direction thereof. The X and Y axes are axes along the horizontal plane, and the Z axis is an axis along the plumb line. The +Z direction is the vertically downward direction. Figure 1 The X, Y, and Z directions in the figure and the X, Y, and Z directions in other figures represent the same directions.

[0029] The injection molding device 10 is a device for forming a molded product by injecting a plasticized material into a mold 20. The injection molding device 10 includes a plasticizing unit 100, a metering injection unit 200, a first driving unit 300, a pressure detecting unit 220, and a control unit 500.

[0030] The plasticizing section 100 includes a screw 130 and a roller 140. The plasticizing section 100 plasticizes at least a portion of a material supplied from a material supply section such as a hopper not shown in the figure, generates a plasticized material in a paste state having fluidity, and guides the plasticized material to the metering injection section 200. In the present embodiment, ABS resin formed into granules is used as the material. "Plasticization" refers to the softening of a thermoplastic material by heating it to a temperature above the glass transition temperature, thereby exhibiting fluidity. "Melting" refers not only to the fact that a thermoplastic material is heated to a temperature above the melting point and becomes liquid, but also to the fact that a thermoplastic material is plasticized. In addition, the screw 130 of the present embodiment is sometimes also referred to as a "flat head screw" or a "vortex element".

[0031] The screw 130 has a generally cylindrical shape in which the height along the direction of the central axis RX is smaller than the diameter. The screw 130 is accommodated in a space surrounded by the housing 110 and the drum 140. The screw 130 is connected to a screw drive motor 170 via a first reducer 160. The screw 130 is rotated around the central axis RX by the screw drive motor 170. The screw drive motor 170 is driven under the control of the control unit 500. In addition, the central axis RX is sometimes also referred to as the rotation axis of the screw 130.

[0032] Figure 21 is a three-dimensional view of the screw 130. The screw 130 has a groove forming surface 132 provided with a groove portion 135 on the surface opposite to the roller 140. The groove portion 135 of the screw 130 constitutes a so-called vortex groove. The groove portion 135 extends in a spiral shape from the central portion 137 toward the outer periphery of the screw 130 in a manner of describing an arc. The groove portion 135 can be configured to extend in an involute curve shape or a spiral shape. A convex strip portion 136 that constitutes a side wall portion of the groove portion 135 and extends along each groove portion 135 is provided on the groove forming surface 132. The groove portion 135 is continuous to a material introduction port 134 provided on the side surface 133 of the screw 130. The material introduction port 134 is a portion for receiving the material into the groove portion 135. The material supplied from the material supply portion is supplied between the screw 130 and the roller 140 via the material introduction port 134.

[0033] Figure 2 The example of the screw 130 having three grooves 135 and three convex strips 136 is shown. The number of grooves 135 and convex strips 136 provided in the screw 130 is not limited to three. Only one groove 135 may be provided in the screw 130, or two or more grooves 135 may be provided. In addition, any number of convex strips 136 may be provided in accordance with the number of grooves 135.

[0034] Figure 2 The figure shows an example of a screw 130 having material introduction ports 134 formed at three locations. The number of material introduction ports 134 provided in the screw 130 is not limited to three. The material introduction port 134 may be provided at only one location in the screw 130 or at two or more locations.

[0035] Figure 3 1 is an explanatory diagram showing the structure of the opposing surface 142 side of the roller 140. The roller 140 has an opposing surface 142 that is opposite to the groove forming surface 132 of the screw 130. A connecting hole 146 connected to the nozzle 150 is provided at the center of the opposing surface 142. A plurality of guide grooves 144 are provided around the connecting hole 146 in the opposing surface 142. One end of each guide groove 144 is connected to the connecting hole 146, and extends in a spiral shape from the connecting hole 146 toward the outer periphery of the opposing surface 142. Each guide groove 144 has a function of guiding the molding material to the connecting hole 146. In addition, the guide groove 144 may not be formed in the roller 140.

[0036] like Figure 1 As shown, the drum 140 is provided with a heater 148. The heater 148 heats the plasticizing section 100. In the present embodiment, the heater 148 is composed of four rod-shaped heaters provided in the drum 140. The output of the heater 148 is controlled by the control section 500. The material supplied between the screw 130 and the drum 140 is plasticized by being sheared by the rotation of the screw 130 and heated by the heater 148.

[0037] The nozzle 150 has a cylindrical shape extending in the Y direction. The nozzle 150 is connected to the connecting hole 146, and supplies the plasticized material flowing out of the connecting hole 146 to the metering injection unit 200. The flow path in the nozzle 150 is provided with a check valve 152. The check valve 152 prevents the plasticized material from flowing back from the nozzle 150 to the screw 130. In addition, the check valve 152 may be provided in the connecting hole 146 instead of the nozzle 150.

[0038] The forming mold 20 includes a first mold 21 and a second mold 22. In the present embodiment, a cavity 23 is formed in the second mold 22. The first mold 21 is arranged on the plasticizing portion 100 side, and the second mold 22 is arranged on the first driving portion 300 side. A slide valve 24 for allowing the plasticized material to flow into the cavity 23 is formed in the first mold 21. The first mold 21 and the second mold 22 are formed of metal or resin. When the first mold 21 and the second mold 22 are formed of metal, the forming mold 20 is also referred to as a metal mold. The first mold 21 may also be referred to as a fixed mold, and the second mold 22 may also be referred to as a movable mold.

[0039] The first mold 21 and the second mold 22 are configured to be movable along the tie rod 400 extending in the Y direction. The second mold 22 is connected to the first drive unit 300 via the ball screw 310 and the second reducer 320. The first drive unit 300 in this embodiment is composed of a motor. The first drive unit 300 is driven under the control of the control unit 500. By driving the first drive unit 300 by the control unit 500, the second mold 22 moves in the Y direction along the tie rod 400. The second mold 22 is moved toward the first mold 21 by the first drive unit 300, and the second mold 22 contacts the first mold 21, thereby closing the first mold 21 and the second mold 22. After closing the molds, by further driving the first drive unit 300, the first mold 21 and the second mold 22 move toward the plasticizing unit 100 side.

[0040] The metering injection unit 200 is arranged between the plasticizing unit 100 and the forming mold 20. The metering injection unit 200 has the function of metering the plasticized material and injecting the measured plasticized material into the forming mold. The metering injection unit 200 is fixed to the surface of the first mold 21 on the side of the plasticizing unit 100. The metering injection unit 200 has a storage chamber 210 for storing the plasticized material. The storage chamber 210 is formed in a cylindrical shape, and its internal space is connected to the slide valve 24 formed in the first mold 21. The nozzle 150 is inserted into the storage chamber 210. The plasticized material is metered by supplying the plasticized material from the nozzle 150 to the storage chamber 210. The metering injection unit 200 is configured to be movable together with the first mold 21. The volume of the internal space of the storage chamber 210 changes according to the change of the relative position of the metering injection unit 200 relative to the nozzle 150. When the metering injection unit 200 moves in the −Y direction together with the first mold 21 and the second mold 22 , the nozzle 150 functions as a piston, and the plasticized material metered in the storage chamber 210 is injected into the cavity 23 through the slide valve 24 .

[0041] The metering injection unit 200 includes a pressure detection unit 220 for detecting the pressure in the storage chamber 210. In addition, the metering injection unit 200 includes a temperature detection unit 230 for detecting the temperature in the storage chamber 210. The pressure detection unit 220 is composed of a pressure sensor, and the temperature detection unit 230 is composed of a temperature sensor. The pressure detection unit 220 and the temperature detection unit 230 are connected to the control unit 500.

[0042] The metering and injection unit 200 is provided with a heating unit 240. The output of the heating unit 240 is controlled by the control unit 500. The control unit 500 controls the heating unit 240 so that the temperature in the metering and injection unit 200 detected by the temperature detection unit 230, that is, the temperature of the measured plasticized material, is constant.

[0043] A first force applying part 410 is provided between the first mold 21 and the plasticizing part 100, and the first force applying part 410 applies force in a direction to separate the first mold 21 and the metering injection part 200 from the plasticizing part 100. The first force applying part 410 in this embodiment is composed of a compression coil spring. The pull rod 400 passes through the center of the compression coil spring constituting the first force applying part 410. When the mold is not closed, the first mold 21 is configured with a predetermined interval relative to the plasticizing part 100 by applying force to the first mold 21 in the +Y direction by the first force applying part 410. The interval is determined by the position of the stopper 25 that restricts the movement of the first mold 21 in the +Y direction.

[0044] The control unit 500 is composed of a computer having one or more processors and a memory. The control unit 500 executes the injection molding process described later by executing the program stored in the memory by the processor. The control unit 500 is connected to a notification unit 510. In the present embodiment, the notification unit 510 is provided with a display device. The control unit 500 notifies the operator of error information, etc. by controlling the notification unit 510. In addition, the notification unit 510 may also be provided with a sound output device instead of the display device or in addition to the display device, and the error is notified by sound.

[0045] Figure 4 1 is a flowchart of an injection molding process as an example of a method performed by the injection molding device 10. The control unit 500 repeatedly performs the injection molding process by controlling the plasticizing unit 100 and the first driving unit 300. In this embodiment, at the start time of the injection molding process, metering and mold opening have been completed by performing the previous injection molding process. In addition, by performing the first injection molding process Figure 4 The injection molding process shown is capable of metering and mold opening.

[0046] In step S100 , the control unit 500 performs mold clamping. Specifically, the control unit 500 performs mold clamping by controlling the first driving unit 300 to move the second mold 22 toward the first mold 21 that is biased toward the second mold 22 by the first force applying unit 410 . Figure 5 2 is a diagram showing a state where mold clamping is performed. The mold clamping force in this embodiment is determined by the relationship between the force of moving the second mold 22 by the first driving unit 300 and the force of applying the first mold 21 to the second mold 22 side by the first force applying unit 410. Therefore, the operator can adjust the mold clamping force by changing the spring constant of the coil spring constituting the first force applying unit 410.

[0047] If the mold closing is completed, then in step S110, the control unit 500 starts the injection operation in a manner linked to the mold closing action. Specifically, after the control unit 500 drives the first drive unit 300 in the mold closing action, it further drives the first drive unit 300 to move the plasticizing unit 100 and the metering injection unit 200 in a direction approaching each other at a first reference speed. In this way, the nozzle 150 acts as a piston, and the plasticized material in the metering injection unit 200 is injected into the cavity 23 through the slide valve 24. In this embodiment, as described below, in the injection operation, the relative movement speed of the plasticizing unit 100 and the metering injection unit 200 is controlled according to the pressure Pr in the metering injection unit 200. The processing from step S110 to step S180 described below is also referred to as an injection process.

[0048] In step S120, the control unit 500 determines whether the pressure Pr in the metering injection unit 200 is greater than or equal to the first reference value P1. When it is determined in step S120 that the pressure Pr is not greater than the first reference value P1, that is, when the pressure Pr is less than the first reference value P1, in step S130, the control unit 500 controls the first driving unit 300 to move the metering injection unit 200 closer to the plasticizing unit 100 at a speed faster than the first reference speed and perform injection. The first reference speed is predetermined as a moving speed that generates an ideal pressure for filling the plasticized material into the cavity 23 without gaps.

[0049] In step S120, when it is determined that the pressure Pr is greater than or equal to the first reference value P1, in step S140, the control unit 500 determines whether the pressure Pr is less than or equal to the second reference value P2. In step S140, when it is determined that the pressure Pr is less than or equal to the second reference value P2, in step S150, the control unit 500 moves the metering injection unit 200 at the first reference speed so as to approach the plasticizing unit 100 and performs injection. That is, when the pressure Pr is greater than or equal to the first reference value P1 and less than or equal to the second reference value P2 during the injection operation, the control unit 500 moves the metering injection unit 200 at the first reference speed so as to approach the plasticizing unit 100 and performs injection.

[0050] In step S140, when it is determined that the pressure Pr is not a value below the second reference value P2, that is, the pressure Pr is greater than the second reference value, in step S160, the control unit 500 further determines whether the pressure Pr is below the first threshold value. In step S160, when it is determined that the pressure Pr is below the first threshold value, in step S170, the control unit 500 moves the metering injection unit 200 at a speed slower than the first reference speed so as to approach the plasticizing unit 100 and perform injection. In contrast, in step S160, when it is determined that the pressure Pr is not a value below the first threshold value, that is, the pressure Pr exceeds the first threshold value, the control unit 500 stops the injection operation and transfers the process to step S210. Then, in step S210, the control notification unit 510 notifies an error indicating that the injection cannot be performed properly, and ends the injection molding process.

[0051] Figure 6 : is a graph showing an example of changes in the pressure Pr during the injection operation. Figure 6 The solid line shows the change of the pressure Pr with respect to the time t. In addition, the dotted line shows the first reference value P1 and the second reference value P2 compared with the pressure Pr. The second reference value P2 is a value greater than the first reference value P1. The first reference value P1 and the second reference value P2 are predetermined as pressure values ​​for molding a molded product with high precision, for example.

[0052] like Figure 6As shown, at time t1, the pressure Pr is lower than the first reference value P1. At this time, when the metering injection unit 200 moves at the first reference speed, the amount of plasticized material injected from the metering injection unit 200 into the cavity 23 is less than the value when the pressure Pr is greater than the first reference value P1 and less than the second reference value P2. Therefore, the control unit 500 moves the metering injection unit 200 at a speed faster than the first reference speed by executing the above-mentioned step S130 at time t1. Thereby, the insufficient amount of plasticized material injected into the cavity 23 can be suppressed. In addition, the insufficient amount of plasticized material injected is sometimes also referred to as insufficient filling.

[0053] At time t2, the pressure Pr is higher than the second reference value P2. At this time, when the metering injection unit 200 moves at the first reference speed, the plasticized material is injected into the cavity 23 at a pressure higher than the value when the pressure Pr is greater than the first reference value P1 and less than the second reference value P2. In the case where the plasticized material is injected into the cavity 23 at a pressure higher than the appropriate pressure, residual stress may remain in the molded product, resulting in a decrease in the strength of the molded product. The control unit 500 performs the above-mentioned step S170 at time t2 to move the metering injection unit 200 at a speed slower than the first reference speed, thereby suppressing the molding material from being injected into the cavity 23 at excessive pressure. In addition, the stress remaining in the molded product is sometimes also referred to as residual stress.

[0054] For example, due to changes in the amount and state of the plasticized material in the metering injection unit 200, changes in the pressure Pr at time t1 and time t2 occur. In addition, the pressure Pr sometimes changes depending on the shape of the cavity 23. For example, when the plasticized material injected into the cavity 23 passes through a portion of the cavity 23 with a small flow path cross-sectional area, the pressure Pr sometimes becomes larger than when the plasticized material passes through a portion of the cavity 23 with a large flow path cross-sectional area. According to the above steps S120 to S170, the moving speed of the metering injection unit 200 is adjusted so that the pressure Pr converges between the first reference value P1 and the second reference value P2. However, in the case where the pressure Pr exceeds the first threshold value TH1 due to some reasons such as an abnormality in the plasticizing unit 100, the injection operation is stopped and the error is notified through the notification unit 510. The first threshold value TH1 is predetermined as a value at which the pressure rises to produce a molding abnormality.

[0055] In step S180, the control unit 500 determines whether the injection operation is completed. When the movement amount of the metering injection unit 200 reaches a predetermined distance, the control unit 500 determines that the injection operation is completed. Figure 7 The injection operation is completed. Figure 7As shown, when the injection operation is completed, the plasticized material is filled into the molding die 20. If it is determined in step S180 that the injection operation is not completed, the control unit 500 returns the process to step S120 to continue the injection operation.

[0056] When it is determined in step S180 that the injection operation is completed, the control unit 500 maintains the pressure for a predetermined time and then performs the plasticization and metering operation in step S190. Specifically, the plasticization unit 100 is controlled to generate plasticized material, and the first driving unit 300 is controlled to move the plasticization unit 100 and the metering injection unit 200 in a direction away from each other, thereby performing metering. Figure 8 Shows the status of metering operation completion. Figure 8 As shown, when the metering operation is completed, the molded product is formed in the cavity 23, and the plasticized material is stored in the metering injection unit 200. The process of step S190 is also referred to as a metering process.

[0057] After the metering operation is completed, the control unit 500 performs mold opening in a manner linked to the metering operation in step S200. Specifically, after driving the first driving unit 300 in the metering operation, the control unit 500 further drives the first driving unit 300 to move the second mold 22 away from the first mold 21, thereby performing mold opening. Fig. 9 The mold opening state is shown. In this mold opening, the ejector pin (not shown) protrudes into the cavity 23 as the second mold 22 moves, and the molded product is demolded from the cavity 23.

[0058] The control unit 500 can continuously mold molded products by repeatedly executing a series of injection molding processes as described above.

[0059] According to the injection molding device 10 of the first embodiment as described above, the metering injection unit 200 is arranged between the plasticizing unit 100 and the molding die 20, and the metering injection unit 200 is configured so that the volume of the internal space storing the plasticized material changes according to the change of the relative position with the plasticizing unit 100. Therefore, in this embodiment, the actions of mold closing and injection, and the actions of metering and mold opening can be performed in a linked manner by the same first driving unit 300. Therefore, since the structure of the injection molding device 10 can be simplified, the injection molding device 10 can be miniaturized and the cost can be reduced, and in addition, the injection molding can be effectively performed by the same first driving unit 300.

[0060] Furthermore, in the present embodiment, the injection operation is performed while controlling the relative movement speed of the plasticizing part 100 and the metering injection part 200 based on the pressure Pr in the metering injection part 200 detected by the pressure detection part 220. Therefore, even when the amount and state of the plasticized material in the metering injection part 200 change, the injection accuracy of the plasticized material is maintained high. Therefore, the molding quality can be improved.

[0061] In addition, in the present embodiment, during the injection operation, when the pressure Pr in the metering injection unit 200 exceeds the first threshold value TH1, the injection operation is stopped and a notification is made using the notification unit 510. Therefore, for example, it is possible to suppress the abnormal increase in the pressure of the injected plasticized material and the occurrence of molding defects. As a result, the molding quality can be improved.

[0062] In addition, in the present embodiment, since the heating unit 240 is provided in the metering injection unit 200, it is possible to suppress the temperature drop of the plasticized material in the metering injection unit 200. In addition, in the present embodiment, the temperature of the measured plasticized material can be maintained at a constant temperature by controlling the heating unit 240. Therefore, the molding quality can be improved.

[0063] In addition, in this embodiment, a first force applying unit 410 for applying force in a direction to separate the injection unit 200 and the plasticizing unit 100 from each other is provided between the plasticizing unit 100 and the first mold 21. Therefore, the mold clamping force can be adjusted by the first force applying unit.

[0064] Furthermore, in the present embodiment, since the screw 130 constituting the plasticizing portion 100 has a substantially cylindrical shape in which the height along the direction of the central axis RX thereof is smaller than the diameter, the injection molding device 10 can be further miniaturized.

[0065] B. Second Implementation Method:

[0066] Fig.10 This is a flow chart of the injection molding process in the second embodiment. The structure of the injection molding device 10 in the second embodiment is the same as that in the first embodiment. In the first embodiment, the injection operation is performed according to the pressure Pr in the metering injection part 200. In the second embodiment, as described below, the metering operation is performed according to the pressure Pr. In the second embodiment, as in the first embodiment, at the start time point of the injection molding process, the metering and mold opening are completed by executing the previous injection molding process.

[0067] In step S300, the control unit 500 performs mold clamping in the same manner as in the first embodiment. Next, in step S310, the control unit 500 performs an injection operation. The injection operation in the second embodiment may adjust the moving speed of the metering injection unit 200 according to the pressure Pr in the same manner as in the first embodiment, or may move the metering injection unit 200 at a fixed speed regardless of the pressure Pr. The processing in step S310 is equivalent to the injection process in the second embodiment.

[0068] In step S320, the control unit 500 starts the plasticization and metering operation of the material. In the present embodiment, the control unit 500 controls the first driving unit 300 to move the plasticizing unit 100 and the metering injection unit 200 in a direction away from each other at a second reference speed, and at the same time supplies the plasticized material from the nozzle 150 into the metering injection unit 200, thereby causing the metering injection unit 200 to meter the plasticized material. In the present embodiment, as described below, in this metering operation, the relative movement speed of the plasticizing unit 100 and the metering injection unit 200 is controlled according to the pressure Pr in the metering injection unit 200. The processing from step S320 to step S380 described below is equivalent to the metering process in the second embodiment.

[0069] In step S330, the control unit 500 determines whether the pressure Pr is greater than or equal to the third reference value P3. In step S330, when it is determined that the pressure Pr is not greater than the third reference value P3, that is, when the pressure Pr is less than the third reference value P3, in step S340, the control unit 500 controls the first drive unit 300 to move the metering injection unit 200 at a speed slower than the second reference speed so as to be separated from the plasticizing unit 100 and perform metering. The second reference speed is, for example, predetermined as a moving speed that can accurately meter the plasticized material.

[0070] In step S330, when it is determined that the pressure Pr is greater than or equal to the first reference value P1, in step S350, the control unit 500 determines whether the pressure Pr is less than or equal to the fourth reference value P4. In step S350, when it is determined that the pressure Pr is less than or equal to the fourth reference value P4, in step S360, the control unit 500 moves the metering injection unit 200 at the second reference speed so as to be separated from the plasticizing unit 100 and performs metering. That is, in the metering operation, when the pressure Pr is greater than or equal to the third reference value P3 and less than or equal to the fourth reference value P4, the control unit 500 moves the metering injection unit 200 at the second reference speed so as to be separated from the plasticizing unit 100 and performs metering.

[0071] In step S350, when it is determined that the pressure Pr is not less than the fourth reference value P4, that is, when it is determined that the pressure Pr exceeds the fourth reference value P4, in step S370, the control unit 500 moves the metering injection unit 200 at a speed faster than the second reference speed so as to be separated from the plasticizing unit 100 and performs metering.

[0072] Fig.11 is a graph showing an example of changes in pressure Pr during metering operation. Fig.11 In FIG. 1 , the solid line shows the change of the pressure Pr with respect to the time t. In addition, the dotted line shows the third reference value P3 and the fourth reference value P4 with respect to the time t. The fourth reference value P4 is a value greater than the third reference value P3. The third reference value P3 and the fourth reference value P4 are predetermined, for example, as values ​​for measuring the pressure of the plasticized material with high precision.

[0073] like Fig.11 As shown, at time t3, the pressure Pr is lower than the third reference value P3. At this time, when the metering injection unit 200 moves away from the plasticizing unit 100 at the second reference speed, for example, air may be mixed into the metering injection unit 200. Therefore, the control unit 500 performs the above step S340 at time t3 to move the metering injection unit 200 at a speed slower than the second reference speed. As a result, the mixing of air is suppressed and the metering accuracy of the plasticized material is improved.

[0074] At time t4, the pressure Pr is higher than the fourth reference value P4. At this time, when the metering injection unit 200 moves away from the plasticizing unit 100 at the second reference speed, the amount of plasticized material introduced into the metering injection unit 200 is greater than the case where the pressure Pr is greater than the third reference value P3 and less than the fourth reference value P4. Therefore, the control unit 500 moves the metering injection unit 200 at a speed faster than the second reference speed by executing the above-mentioned step S370 at time t4. Thereby, it is possible to suppress excessive plasticized material from being supplied to the metering injection unit 200. In addition, for example, due to changes in the amount and state of the plasticized material generated by the plasticizing unit 100, changes in the pressure Pr at time t3 and time t4 occur. These changes are caused, for example, by changes in the temperature of the plasticizing unit 100.

[0075] In step S380, the control unit 500 determines whether the metering operation is completed. When the movement amount of the metering injection unit 200 reaches a predetermined distance, the control unit 500 determines that the metering operation is completed. In step S380, when it is determined that the metering operation is not completed, the control unit 500 returns the process to step S330 to continue the injection molding process.

[0076] In step S380, when it is determined that the metering operation is completed, in step S390, the control unit 500 determines whether the pressure Pr in the metering injection unit 200 is greater than the second threshold value TH2. In step S390, when it is determined that the pressure Pr is greater than the second threshold value TH2, the control unit 500 controls the first drive unit 300 in step S400 to move the second mold 22 in a manner of separating from the first mold 21, thereby opening the mold. On the other hand, in step S390, when it is determined that the pressure Pr is less than the second threshold value TH2, the control unit 500 controls the notification unit 510 in step S410 to notify an error indicating that metering cannot be performed properly, and ends the injection molding process. The second threshold value TH2 is predetermined as the pressure in the metering injection unit 200 when metering is properly completed.

[0077] According to the second embodiment as described above, the control unit 500 performs the metering operation while controlling the relative moving speed of the plasticizing unit 100 and the metering injection unit 200 based on the pressure Pr detected by the pressure detection unit 220. Therefore, even when the amount and state of the plasticized material generated by the plasticizing unit 100 change, the metering accuracy is maintained high. Therefore, the injection accuracy of the plasticized material is improved, and the molding quality is improved.

[0078] C. Third Implementation Method:

[0079] Fig.12 : is a diagram showing the schematic structure of the injection molding device 10c in the third embodiment. In the first embodiment, mold clamping, metering operation, injection operation, and mold opening are performed by a first drive unit 300. That is, the first drive unit 300 in the first embodiment has a function of opening and closing the molding mold 20 in addition to the function of changing the relative position of the plasticizing unit 100 and the metering injection unit 200. In contrast, the injection molding device 10c in the third embodiment has two drive units, namely, a first drive unit 300c and a second drive unit 350c, and these drive units perform mold clamping, metering operation, injection operation, and mold opening. In the third embodiment, the drive unit for opening and closing the molding mold 20 is the second drive unit 350c. The second drive unit 350c is connected to the second mold 22 via the second reducer 320 and the ball screw 310, similar to the first drive unit 300 in the first embodiment. The first drive unit 300c in the third embodiment is a drive unit for changing the relative position of the plasticizing unit 100 and the metering injection unit 200. The first drive unit 300c in the third embodiment is composed of a cylinder. In addition, the first drive unit 300c may be composed of a motor, a speed reducer, and a ball screw, similarly to the second drive unit 350c.

[0080] The second driving part 350c is fixed to the fixed table 351, and the fixed table 351 and the first mold 21 are connected by the tie rod 400 along the Y direction so that the distance between them does not change. In addition, the second mold 22 is configured to be able to move in the Y direction along the tie rod 400 between the first mold 21 and the fixed table 351. The first mold 21, the second mold 22, and the fixed table 351 are respectively supported from below by the linear guide rail 600 and can move in the Y direction. However, although the first mold 21 and the fixed table 351 can move in the Y direction, since they are connected by the tie rod 400, the distance between them does not change. In addition, the first mold 21, the second mold 22, and the fixed table 351 can also be supported by rails or wheels instead of the linear guide rail 600.

[0081] The first driving unit 300c includes a rod 330 that can be moved in and out in the Y direction. The front end of the rod 330 is connected to a fixed table 351 to which the second driving unit 350c is fixed. The first driving unit 300c moves the rod 330 in the Y direction under the control of the control unit 500, thereby enabling the first mold 21, the second mold 22, and the second driving unit 350c to move in the Y direction together.

[0082] The injection molding device 10c in the third embodiment performs the same injection molding process as the first embodiment or the second embodiment, thereby enabling injection molding. However, the control unit 500 uses the second drive unit 350c to move the second mold 22 relative to the first mold 21 to perform injection molding. Figure 4 Step S100, Fig.10 The mold closing in step S300, and Figure 4 Step S200, Fig.10 In addition, the control unit 500 uses the first driving unit 300c to move the forming mold 20 together with the second driving unit 350c relative to the plasticizing unit 100 to perform Figure 4 Steps S110 to S180, Fig.10 The injection operation in step S310, and Figure 4 Step S190, Fig.10 The metering operation in steps S320 to S380. Fig.13 2 shows the situation where the metering operation is performed by the first driving part 300c. Fig.14 The case where the injection operation is performed by the first driving part 300c is shown.

[0083] According to the third embodiment as described above, the second drive unit 350c for performing mold clamping and mold opening and the first drive unit 300c for performing injection operation and metering operation are used as different drive units, so that the mold clamping force can be increased by the second drive unit 350c. In addition, since the setting freedom of the mold clamping force and the injection pressure can be increased, injection molding corresponding to various molding conditions can be performed.

[0084] In addition, in the third embodiment, the first drive unit 300c for changing the relative position of the plasticizing unit 100 and the metering injection unit 200 and the second drive unit 350c for opening and closing the molding die 20 are different drive units. In contrast, in the first embodiment, the first drive unit for changing the relative position of the plasticizing unit 100 and the metering injection unit 200 and the second drive unit for opening and closing the molding die 20 are the same drive unit, specifically the first drive unit 300.

[0085] D. Fourth Implementation Method:

[0086] Fig.15 1 is a diagram showing a schematic structure of an injection molding device 10d in a fourth embodiment. In the first embodiment, the direction in which the first mold 21 and the second mold 22 are moved is a horizontal direction. In contrast, in the fourth embodiment, the direction in which the first mold 21 and the second mold 22 are moved is a vertical direction. Specifically, Figure 1 The injection molding device 10 is vertically arranged with the first drive unit 300 side at the bottom. According to this structure, it is possible to omit Figure 1 The first force applying part 410 shown. That is, by configuring the injection molding device 10d vertically, the first mold 21 always moves toward the second mold 22 due to gravity. Therefore, even if the first force applying part 410 that acts in the direction of separating the first mold 21 from the plasticizing part 100 is not provided, the mold closing and injection operations can be performed by moving the second mold 22 upward. In addition, if the second mold 22 is moved downward using the first driving part 300, the first mold 21 moves downward due to its own weight, so the metering operation can be performed in coordination with this movement. In this embodiment, the weight of the first mold 21 and the metering injection part 200 can be changed by installing a counterweight 26, etc., thereby adjusting the mold closing force.

[0087] E. Fifth Implementation Method:

[0088] Fig.16: is a diagram showing a schematic structure of an injection molding device 10e in a fifth embodiment. The injection molding device 10e in the fifth embodiment includes a second force applying portion 420 between the first mold 21 and the second mold 22 for applying a force in a direction in which the first mold 21 and the second mold 22 are separated from each other. The other structures of the injection molding device 10e are the same as those of the first embodiment. A compression coil spring can be used as the second force applying portion 420. According to this structure, the first mold 21 can be brought close to the plasticizing portion 100 while the mold is slowly closed, so that the injection operation can be started before the molding mold 20 is completely closed. As a result, for example, by setting the spring constants of the first force applying portion 410 and the second force applying portion 420 in a manner that the injection operation and the mold closing are completed almost simultaneously, low-pressure injection molding can be performed. In addition, by providing the second force applying portion 420, the mold opening of the first mold 21 and the second mold 22 can be assisted by the second force applying portion 420. In addition, the second force applying portion 420 can also be applied to the injection molding device 10c in the third embodiment.

[0089] The first force applying unit 410 shown in the first embodiment and the second force applying unit 420 in the fifth embodiment are not limited to elastic bodies such as coil springs, but may be formed by actuators using power sources such as motors that can be controlled by the control unit 500 .

[0090] F. Sixth embodiment:

[0091] Fig.17 1 is a diagram showing a schematic structure of an injection molding device 10f in the sixth embodiment. The injection molding device 10f in the sixth embodiment includes a clamp 700 that assists in the clamping of the first mold 21 and the second mold 22. After the clamp 700 is clamped, it is transported by a moving mechanism (not shown) to clamp the first mold 21 and the second mold 22. According to this structure, even when the first force applying part 410 is composed of an elastic body such as a coil spring, a large clamping force can be ensured.

[0092] G. Other implementations:

[0093] (G-1) In the above embodiment, the control unit 500 can control the rotation speed or torque of the screw drive motor 170 according to the pressure Pr detected by the pressure detection unit 220. Thus, the control unit 500 can control the amount of plasticized material generated in the plasticizing unit 100 according to the pressure Pr. For example, the larger the pressure Pr, the more the control unit 500 reduces the rotation speed of the screw drive motor 170, and the smaller the pressure Pr, the more the control unit 500 increases the rotation speed of the screw drive motor 170. Thus, metering can be performed with high precision, and thus the molding quality can be improved.

[0094] (G-2) In the above embodiment, the control unit 500 controls the heating unit 240 provided in the metering injection unit 200 according to the temperature detected by the temperature detection unit 230. In contrast, the control unit 500 may control the heating unit 240 according to the pressure Pr detected by the pressure detection unit 220 during the injection operation or the metering operation. Specifically, the control unit 500 performs a process of reducing the output of the heating unit 240 as the pressure Pr increases. Thus, the viscosity of the plasticized material in the metering injection unit 200 can be stabilized.

[0095] (G-3) In the above embodiment, during the injection operation or after the metering operation, the pressure Pr in the metering injection unit 200 is compared with the first threshold TH1 or the second threshold TH2, and the notification unit 510 is used to make a notification. However, the notification unit 510 may not be used to make a notification.

[0096] (G-4) In the above embodiment, the metering and injection unit 200 includes the heating unit 240. On the other hand, the metering and injection unit 200 may not include the heating unit 240. For example, a heat insulating material may be disposed around the metering and injection unit 200.

[0097] (G-5) In the above embodiment, the plasticizing section 100 uses a substantially cylindrical screw whose height along the center axis RX direction is smaller than its diameter as the screw 130. In contrast, the plasticizing section 100 may use a helical coaxial screw.

[0098] H.Other methods:

[0099] The present invention is not limited to the above-mentioned embodiments, and can be implemented in various configurations within the scope of its purpose. For example, in order to solve part or all of the above-mentioned technical problems, or to achieve part or all of the above-mentioned effects, the technical features of the embodiments corresponding to the technical features in each mode described below can be appropriately replaced or combined. In addition, if the technical feature is not described as a necessary technical feature in this specification, it can be appropriately deleted.

[0100] (1) According to a first aspect of the present invention, there is provided an injection molding device. The injection molding device is characterized in that it comprises: a plasticizing unit that plasticizes a material to generate a plasticized material; a metering injection unit that is disposed between the plasticizing unit and a molding die, meters the plasticized material, and injects the measured plasticized material into the molding die; a first driving unit that changes the relative position of the plasticizing unit and the metering injection unit; a pressure detecting unit that detects the pressure in the metering injection unit; and a control unit that changes the volume of an internal space of the metering injection unit that stores the plasticized material according to the change in the relative position of the metering injection unit and the plasticizing unit, and the control unit performs at least one of a metering operation and an injection operation according to the pressure, wherein the metering operation is an operation in which the plasticizing unit and the metering injection unit are moved in a direction away from each other by controlling the first driving unit, so that the metering injection unit meters the plasticized material, and the injection operation is an operation in which the plasticizing unit and the metering injection unit are moved in a direction close to each other by controlling the first driving unit, so that the measured plasticized material is injected into the molding die.

[0101] According to this aspect, the pressure in the metering injection unit is detected, and at least one of the metering operation and the injection operation is performed based on the pressure, so that the molding quality can be improved.

[0102] (2) In the above embodiment, the control unit may control the relative movement speed of the plasticizing unit and the metering injection unit according to the pressure. According to this embodiment, the molding quality can be improved by controlling the relative movement speed of the plasticizing unit and the metering injection unit according to the pressure.

[0103] (3) In the above aspect, the control unit may control the amount of the plasticized material generated in the plasticizing unit according to the pressure. According to this aspect, by controlling the amount of the plasticized material generated in the plasticizing unit according to the pressure, the molding quality can be improved.

[0104] (4) In the above aspect, a notification unit may be further provided, and when the pressure exceeds a first threshold value during the injection operation, the control unit stops the injection operation and controls the notification unit to make a notification. According to this aspect, since the occurrence of defective molding can be suppressed, the molding quality can be improved.

[0105] (5) In the above aspect, a notification unit may be further provided, and the control unit may control the notification unit to make a notification when the pressure is less than a second threshold value after the metering operation. According to this aspect, since the occurrence of molding defects can be suppressed, the molding quality can be improved.

[0106] (6) In the above aspect, the metering injection unit may include a heating unit. According to this aspect, since a decrease in the temperature of the plasticized material during metering can be suppressed, molding quality can be improved.

[0107] (7) In the above embodiment, a temperature detection unit for detecting the temperature of the metering injection unit may be provided, and the control unit controls the heating unit according to the temperature of the metering injection unit or the pressure. According to this embodiment, since the temperature of the plasticized material being metered can be kept constant, the molding quality can be improved.

[0108] (8) In the above embodiment, a first force applying unit for applying force in a direction in which the injection unit and the plasticizing unit are separated from each other may be provided. According to this configuration, the mold clamping force can be adjusted by the first force applying unit.

[0109] (9) In the above aspect, a second force applying unit may be provided for applying force in a direction to separate the first and second molds constituting the molding die. According to this aspect, the mold can be closed slowly, and the second force applying unit can assist in mold opening.

[0110] (10) In the above aspect, the first drive unit may have a function of opening and closing the molding die in addition to a function of changing the relative positions of the plasticizing unit and the metering injection unit. According to this aspect, the injection molding device can be miniaturized.

[0111] (11) In the above aspect, a second drive unit for opening and closing the molding die may be further provided. According to this aspect, the mold clamping force can be increased by the second drive unit.

[0112] (12) In the above embodiment, the plasticizing section may include: a screw that rotates about a rotation axis and has a groove-forming surface on which grooves are formed; and a roller that has an opposing surface opposite to the groove-forming surface, wherein a connecting hole for the plasticized material to flow out is provided on the opposing surface. According to this embodiment, the injection molding device can be miniaturized.

[0113] (13) According to a second aspect of the present invention, there is provided an execution method of an injection molding device, the injection molding device comprising: a plasticizing part that plasticizes a material to generate a plasticized material; a metering injection part that is disposed between the plasticizing part and a molding die, meters the plasticized material, and injects the measured plasticized material into the molding die; a first driving part that changes the relative position of the plasticizing part and the metering injection part; and a pressure detecting part that detects the pressure in the metering injection part, wherein the volume of a space storing the plasticized material in the metering injection part changes according to the change in the relative position of the metering injection part and the plasticizing part. The method is characterized in that it comprises: a metering step, wherein the plasticizing part and the metering injection part are moved in a direction away from each other by controlling the first driving part, so that the metering injection part meters the plasticized material; and an injection step, wherein the plasticizing part and the metering injection part are moved in a direction approaching each other by controlling the first driving part, so that the measured plasticized material is injected into the molding die, and at least one of the metering step and the injection step is executed according to the pressure.

Claims

1. An injection molding device, characterized in that: have: A plasticizing section, plasticizing the material to generate a plasticized material; A metering injection unit is disposed between the plasticizing unit and the forming mold, measures the plasticized material, and injects the measured plasticized material into the forming mold, wherein the forming mold has a first mold and a second mold; A first driving unit, which changes the relative position of the plasticizing unit and the metering injection unit; A pressure detection unit, detecting the pressure in the metering injection unit; as well as Control Department, According to the change of the relative position between the metering injection part and the plasticizing part, the volume of the internal space of the metering injection part storing the plasticized material changes. The control unit performs at least one of a metering operation and an injection operation according to the pressure, The metering operation is as follows: by controlling the first driving part, the plasticizing part and the metering injection part are moved in a direction away from each other, so that the metering injection part meters the plasticized material. The injection operation is as follows: by controlling the first driving unit, the plasticizing unit and the metering injection unit are moved in a direction approaching each other, and the metered plasticized material is injected into the molding die. When the injection operation is performed according to the pressure, if the movement amount of the metering injection unit reaches a predetermined distance, it is determined that the injection operation is completed, When the metering operation is performed according to the pressure, if the movement amount of the metering injection portion reaches a predetermined distance, it is determined that the metering operation is completed.

2. The injection molding device according to claim 1, characterized in that: The control unit controls the relative movement speed of the plasticizing unit and the metering injection unit according to the pressure.

3. The injection molding device according to claim 2, characterized in that: When the injection operation is performed according to the pressure, When the pressure is less than the first reference value, the metering injection part is relatively moved toward the plasticizing part at a speed faster than the first reference speed to perform injection, When the pressure is greater than the first reference value and less than a second reference value, the metering injection unit is relatively moved toward the plasticizing unit at the first reference speed to perform injection, wherein the second reference value is greater than the first reference value. When the pressure is greater than a second reference value and less than a first threshold, the metering injection unit is relatively moved toward the plasticizing unit at a speed slower than the first reference speed to perform injection, wherein the first threshold is greater than the second reference value.

4. The injection molding device according to claim 2, characterized in that: When the metering operation is performed according to the pressure, When the pressure is less than the third reference value, the metering injection part is relatively moved in a direction away from the plasticizing part at a speed slower than the second reference speed, and the metering injection part meters the plasticized material. When the pressure is greater than the third reference value and less than a fourth reference value, the metering injection unit is relatively moved in a direction away from the plasticizing unit at the second reference speed, and the metering injection unit meters the plasticized material, wherein the fourth reference value is greater than the third reference value, When the pressure exceeds a fourth reference value, the metering injection part is relatively moved in a direction away from the plasticizing part at a speed faster than the second reference speed, and the metering injection part meters the plasticized material.

5. The injection molding device according to claim 1 or 2, characterized in that: The control part controls a generated amount of the plasticized material in the plasticizing part according to the pressure.

6. The injection molding device according to claim 3, characterized in that: During the injection operation, when the pressure exceeds the first threshold value, the control portion stops the injection operation.

7. The injection molding device according to claim 3, characterized in that: The injection molding device includes a notification unit, During the injection operation, when the pressure exceeds the first threshold, the control unit controls the notification unit to perform notification.

8. The injection molding device according to claim 1 or 2, characterized in that: The injection molding device includes a notification unit, After the metering operation, when the pressure is less than a second threshold, the control unit controls the notification unit to perform notification.

9. The injection molding device according to claim 1 or 2, characterized in that: The metering and injection part has a heating part.

10. The injection molding device according to claim 9, characterized in that: The injection molding device includes a temperature detection unit that detects the temperature of the metering injection unit. The control unit controls the heating unit according to the temperature of the metering and injection unit or the pressure.

11. The injection molding device according to claim 1 or 2, characterized in that: The injection molding device includes a first force applying unit that applies a force in a direction in which the metering injection unit and the plasticizing unit are separated from each other.

12. The injection molding device according to claim 1 or 2, characterized in that: The injection molding device includes a second force applying unit that applies a force in a direction in which the first mold and the second mold are separated from each other.

13. The injection molding device according to claim 1 or 2, characterized in that: The first driving unit has a function of opening and closing the molding die in addition to a function of changing the relative positions of the plasticizing unit and the metering injection unit.

14. The injection molding device according to claim 1 or 2, characterized in that: The injection molding device includes a second drive unit for opening and closing the molding die.

15. The injection molding device according to claim 1 or 2, characterized in that: The plasticizing part includes: a screw that rotates around a rotation axis and has a groove-forming surface on which grooves are formed; and a roller that has an opposing surface facing the groove-forming surface, and a communicating hole through which the plasticized material flows out is provided on the opposing surface.

16. An execution method of an injection molding device, characterized in that: The injection molding device comprises: A plasticizing section, plasticizing the material to generate a plasticized material; A metering injection unit is disposed between the plasticizing unit and the forming mold, measures the plasticized material, and injects the measured plasticized material into the forming mold, wherein the forming mold has a first mold and a second mold; A first driving unit, which changes the relative position of the plasticizing unit and the metering injection unit; as well as A pressure detection unit, used to detect the pressure in the metering injection unit, According to the change of the relative position between the metering injection part and the plasticizing part, the volume of the space of the metering injection part storing the plasticized material changes. The execution method of the injection molding device comprises: a metering step, controlling the first driving part to move the plasticizing part and the metering injection part in a direction away from each other, so that the metering injection part meters the plasticized material; as well as In the injection step, the first driving unit is controlled to move the plasticizing unit and the metering injection unit toward each other, thereby injecting the metered plasticized material into the molding die. performing at least one of the metering process and the injection process according to the pressure, When the injection process is performed according to the pressure, when the movement amount of the metering injection unit reaches a predetermined distance, it is determined that the injection process is completed. When the metering step is executed based on the pressure, if the movement amount of the metering injection unit reaches a predetermined distance, it is determined that the metering step is completed.

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