Resin supply device, resin molded article manufacturing device, and resin molded article manufacturing method

Abstract

Provided is a resin supply device that can improve the quality and productivity of a resin molded article. A resin supply device (100) comprises: a storage portion (14) including a discharge portion (12a); a pressing mechanism (30) including a pressing portion (32) to be inserted into the storage portion (14), the pressing mechanism (30) pushing out a resin material (13) from the discharge portion (12a) by movement of the pressing portion (32); a detection portion (50) that detects the weight of the resin material (13) supplied onto a supply target (60); and an opening / closing mechanism (40) including chucks (42, 43) configured to be capable of establishing an open state and a closed state. When the weight of the resin material (13) pushed out from the discharge portion (12a) and supplied onto the supply target (60) and detected by the detection portion (50) is defined as the detected weight, a control unit (70) stops the movement of the pressing unit (32) when the detected weight reaches or exceeds a first predetermined value, and changes the state of the chucks (42, 43) from the open state to the closed state when the detected weight reaches or exceeds a second predetermined value after the movement of the pressing unit (32) is stopped.

Description

Resin supplying device, resin molding manufacturing device, and resin molding manufacturing method

[0001] The present disclosure relates to a resin supplying device, a resin molded product manufacturing device, and a resin molded product manufacturing method.

[0002] As disclosed in Japanese Patent Laid-Open No. 2018-134846 (Patent Document 1), a resin supplying device that supplies a resin material to a supply target is known. The device described in Patent Document 1 includes a syringe, a nozzle, a plunger, and a pinch valve. The pinch valve opens and closes the nozzle by pinching it. When the plunger stops moving downward and the pinch valve closes, the discharge of liquid resin from the nozzle stops.

[0003] Japanese Patent Application Laid-Open No. 2018-134846

[0004] In a resin supply device, when the movement of a pressing part (e.g., a plunger) inside a container (e.g., a syringe) that contains the resin stops, the resin inside the container is no longer pressurized. Even after the movement of the pressing part stops, the resin material continues to be discharged from the discharge part (e.g., a nozzle) for a while. The phenomenon in which the resin material continues to be discharged from the discharge part after the movement of the pressing part stops is also called "dripping."

[0005] The resin supply device may use a component called a chuck. The chuck is arranged to contact the discharge portion and open and close the internal space of the discharge portion. For example, when dripping occurs, the chuck is actuated to transition from an open state to a closed state, thereby preventing the resin material from being continuously supplied to the object.

[0006] When the chuck is closed, some of the resin material adhering to the internal space of the discharge section is pushed out and supplied to the object. Furthermore, the resin supply device moves up and down to promote the discharge of the resin material. This series of operations is also called "draining the liquid."

[0007] Bringing the weight of resin material ultimately supplied to a target object closer to a desired value leads to improvements in the quality of the dimensions and shape of the resin molded product. Accurately determining the amount of resin material supplied due to dripping and drainage and bringing the weight of resin material ultimately supplied to a target object closer to a desired value takes time. There is a demand for shortening the time required for these processes to improve the productivity of resin molded products.

[0008] The present specification aims to disclose a resin supplying device, a resin molded product manufacturing device, and a resin molded product manufacturing method that can be used to improve the quality and productivity of resin molded products.

[0009] A resin supplying device for supplying a resin material to a supply object includes a storage section that stores the resin material and has a discharge section that discharges the resin material, a pressing mechanism that has a pressing section inserted into the storage section and that pushes the resin material out of the discharge section as the pressing section moves, a detection section that detects the weight of the resin material that has been pushed out of the discharge section and supplied onto the supply object, and a chuck that is configured to be able to form an open state and a closed state, and that allows the resin material pushed out of the discharge section to reach the supply object when the chuck is in the open state, and and a control unit for controlling the movement of the pressing unit and the opening and closing operation of the chuck, wherein the weight of the resin material extruded from the discharge unit and supplied onto the supply object, detected by the detection unit, is taken as a detected weight, and the control unit stops the movement of the pressing unit when the detected weight becomes equal to or greater than a first predetermined value, and changes the chuck from the open state to the closed state when the detected weight becomes equal to or greater than a second predetermined value after the movement of the pressing unit has stopped.

[0010] A resin molding manufacturing method using the resin molding manufacturing apparatus includes the resin supplying device, and includes the steps of: supplying the resin material to a supply target by the resin supplying device; and resin molding the supply target using the resin material.

[0011] According to the matters disclosed in this specification, it is possible to obtain a resin supplying device, a resin molded product manufacturing device, and a resin molded product manufacturing method that can be intended to improve the quality and productivity of resin molded products.

[0012] 1 is a diagram showing functional blocks of an apparatus 1000 for manufacturing a resin molded product. FIG. 1 is a cross-sectional view showing a state before mold clamping of a molding unit 80 provided in the apparatus 1000 for manufacturing a resin molded product. FIG. 2 is a cross-sectional view showing a state after mold clamping of a molding unit 80 provided in the apparatus 1000 for manufacturing a resin molded product. FIG. 3 is a flowchart of a method for manufacturing a resin molded product using the apparatus 1000 for manufacturing a resin molded product. FIG. 4 is a cross-sectional view showing a resin supplying apparatus 100 provided in the apparatus 1000 for manufacturing a resin molded product. FIG. 5 is a timing chart applied to a resin supplying apparatus in a comparative example. FIG. 6 is a flowchart showing each step of resin supplying performed by a resin supplying apparatus in a comparative example. FIG. 7 is a cross-sectional view showing a state in which a resin supplying apparatus 100R in a comparative example is supplying resin. FIG. 8 is a cross-sectional view showing a state in which a resin supplying apparatus 100R in a comparative example is supplying resin. FIG. 9 is a cross-sectional view showing a state in which a resin supplying apparatus 100R in a comparative example is supplying resin. FIG. 10 is a cross-sectional view showing a state in which a resin supplying apparatus 100R in a comparative example is supplying resin. 1A and 1B are cross-sectional views showing a state in which the resin supplying device 100 according to the embodiment is supplying resin (second movement M2); FIG. 1C are cross-sectional views showing a state in which the resin supplying device 100 according to the embodiment is supplying resin (dripping); FIG. 1D are cross-sectional views showing a state in which the resin supplying device 100 according to the embodiment is supplying resin (draining).

[0013] The following describes embodiments of the present disclosure. In the embodiments described below, when numbers, quantities, etc. are mentioned, the scope of the present disclosure is not necessarily limited to those numbers, quantities, etc., unless otherwise specified. Each component is not necessarily essential to the present disclosure, unless otherwise specified. The same reference numbers are used for the same and corresponding components, and redundant descriptions may not be repeated.

[0014] [Apparatus 1000 for manufacturing resin molded products] Fig. 1 is a diagram showing functional blocks of apparatus 1000 for manufacturing resin molded products. Fig. 2 is a cross-sectional view showing a state before mold clamping of molding unit 80 provided in apparatus 1000 for manufacturing resin molded products. Fig. 3 is a cross-sectional view showing a state after mold clamping of molding unit 80 provided in apparatus 1000 for manufacturing resin molded products.

[0015] As shown in Fig. 1, the resin molded product manufacturing apparatus 1000 includes a substrate module 101, a press module 102, a discharge module 103, and a film module 104. The substrate 90 (Fig. 2) is discharged from the substrate module 101, and the film 60 (Fig. 2) is discharged from the film module 104. The discharge module 103 supplies a thermosetting resin material 13 onto the film 60. The press module 102 resin-forms the substrate 90 using the liquid resin material 13 supplied onto the film 60 (Fig. 3).

[0016] In the resin molded product manufacturing apparatus 1000, the substrate module 101, press module 102, discharge module 103, and film module 104 are illustrated as separate modules. Each module may be detachable from the other modules, and the number of modules may be increased or decreased. For example, two or three discharge modules 103 may be disposed between the press module 102 and the film module 104.

[0017] The resin molded product manufacturing apparatus 1000 further includes conveying mechanisms 91 and 92. The conveying mechanism 91 conveys the substrate 90 discharged from the substrate module 101 to the upper die 81 (FIG. 2) of the mold in the molding section 80 (FIG. 2) of the press module 102. The conveying mechanism 92 conveys the film 60 onto which the resin material 13 has been discharged in the discharge module 103 to the lower die 87 (FIG. 2) of the mold in the molding section 80 of the press module 102. The conveying mechanism 92 further conveys the film 60 discharged from the film module 104 and not carrying the resin material 13, to the discharge module 103.

[0018] [Method for manufacturing resin molded product] Fig. 4 is a diagram showing a flowchart of a method for manufacturing a resin molded product using the apparatus 1000 for manufacturing a resin molded product. Fig. 5 is a cross-sectional view showing the resin supplying apparatus 100 provided in the apparatus 1000 for manufacturing a resin molded product. The method for manufacturing a resin molded product will be described here, and the detailed configuration and operation of the resin supplying apparatus 100 will be described later.

[0019] 1 to 5, in the method for manufacturing a resin molded product, first, resin supplying device 100 (FIG. 5) supplies resin material 13 onto film 60 (step S101). For example, conveying mechanism 92 conveys film 60 and frame-shaped tray cover 54 (FIG. 5) placed on film 60 from film module 104 to discharge module 103.

[0020] Next, the resin supply device 100 of the discharge module 103 supplies the resin material 13 onto the film 60 in the tray cover 54. Details of this operation will be described later. Next, the transport mechanism 91 transports the substrate 90 from the substrate module 101 to the press module 102, and places it on the underside of the upper mold 81 of the molding die of the press module 102 (step S102).

[0021] The transport mechanism 91 places the film 60, on which the resin material 13 has been supplied, on the upper surface of the lower mold 87 (step S103). The transport mechanism 92 transports the film 60, on which the resin material 13 has been supplied, from the discharge module 103 together with the tray cover 54 to the press module 102, and places the film 60 on which the resin material 13 is placed on the upper surface of the lower mold 87 of the forming mold of the press module 102. The transport mechanism 92 transports the tray cover 54 to the film module 104 without placing the tray cover 54 in the press module 102.

[0022] 2, in the forming section 80, a block-shaped stationary platen 88 is supported by tie bars or a hold frame. An upper mold 81 is installed below the stationary platen 88. A movable platen 86 is arranged below the stationary platen 88. A lower mold 87 is installed above the movable platen 86.

[0023] The lower mold 87 includes a bottom member 82, a side member 83, a plurality of elastic members 84, and a base plate 85. A recess that is recessed downward is formed in the lower mold 87. The transport mechanism 92 places the film 60 on the upper surface of the lower mold 87 so that the resin material 13 on the film 60 is located on the bottom surface of the recess. The transport mechanism 91 places the substrate 90 on the lower surface of the upper mold 81, as shown in FIG. 2 .

[0024] The upper mold 81 and the lower mold 87 are clamped together by moving the lower mold 87 upward toward the upper mold 81 (step S104). For example, a clamping mechanism (not shown) moves the movable platen 86 upward. This causes the lower mold 87 to move upward toward the upper mold 81. As the movable platen 86 moves upward, the frame-shaped side member 83 first comes into contact with the substrate 90 via the film 60.

[0025] Thereafter, the upward movement of the movable platen 86 continues. With the upward movement of the side members 83 stopped, the bottom member 82 moves upward, and the multiple elastic members 84 contract. When the position of the upper surface of the side members 83 reaches a predetermined position, the upward movement of the movable platen 86 stops, and the mold clamping in step S104 ends.

[0026] After the movement of the lower mold 87 is stopped to close the mold, the temperature of the molding mold is increased (step S105). The resin material 13 is thermosetting. Therefore, when the temperature of the resin material 13 increases, the resin material 13 hardens to become hardened resin 18 ( FIG. 3 ) (step S106). After waiting until the resin material 13 hardens, the base plate 85 is moved downward, thereby moving the lower mold 87 downward. This opens the mold, and a resin molded product is produced in which the underside of the substrate 90 is sealed with resin (step S107).

[0027] In the above, for example, as shown in Figures 2 and 3, a case has been described in which the discharge module 103 of the resin molded product manufacturing apparatus 1000 shown in Figure 1, which is equipped with a press module 102 that places a substrate 90 on an upper mold 81 to manufacture a resin molded product, is equipped with the resin supply device 100 of the above embodiment. However, for example, the discharge module 103 of the resin molded product manufacturing apparatus 1000 shown in Figure 1, which is equipped with a press module 102 that places a substrate 90 on a lower mold 87 to manufacture a resin molded product, may also be equipped with the resin supply device 100 of the above embodiment.

[0028] 5 , the resin supplying device 100 supplies a liquid resin material 13 to a supplying target such as a film 60. Specifically, the resin supplying device 100 includes, for example, a cartridge 10, a holding mechanism 20, a pressing mechanism 30, an opening / closing mechanism 40, a detection unit 50, a mounting table 52, and a control unit 70.

[0029] (Cartridge 10) The cartridge 10 has a lid 11, a storage section 12, and a resin material 13. The storage section 12 stores the resin material 13, and the lid 11 is disposed on the surface of the resin material 13. The lid 11 seals the resin material 13 so that the resin material 13 does not leak out of the storage section 12. The storage section 12 of the cartridge 10 is disposed inside a cylindrical section 23 of a holding mechanism 20, which will be described later. An ejection section 12a is provided at the end of the storage section 12. The cartridge 10 ejects the resin material 13 through the ejection section 12a.

[0030] (Detection Unit 50) A mounting table 52 is disposed below the discharge unit 12a, and the film 60 transported from the film module 104 is placed on the mounting table 52. A frame-shaped tray cover 54 is disposed on the film 60. The resin material 13 is supplied to the inside of the tray cover 54 on the film 60. A detection unit 50 is connected to the mounting table 52, and detects the weight of the resin material 13 extruded from the discharge unit 12a and supplied onto the film 60.

[0031] (Retention mechanism 20) The retention mechanism 20 has a peripheral wall 21, locking members 22, and a cylindrical portion 23, and retains the cartridge 10. A plurality of locking members 22 are provided on the inner periphery of the peripheral wall 21, and the cylindrical portion 23 is locked to the plurality of locking members 22. The cartridge 10 is detachably installed inside the cylindrical portion 23.

[0032] (Pressing mechanism 30) The pressing mechanism 30 has a servo motor 31 and a pressing unit 32. The pressing unit 32 is inserted inside the storage unit 12 of the cartridge 10 and is disposed so as to contact the lid body 11. When the pressing unit 32 moves, the pressing unit 32 presses the resin material 13 via the lid body 11, and the resin material 13 is extruded from the discharge unit 12 a of the cartridge 10.

[0033] (Opening / Closing Mechanism 40, Control Unit 70) The opening / closing mechanism 40 has a drive unit 41 and a pair of chucks 42, 43. The chucks 42, 43 are arranged to open and close the internal space of the discharge unit 12a. The chucks 42, 43 are configured to be able to form an open state and a closed state, and are driven by the drive unit 41 to switch between these states. The discharge unit 12a may have a structure in which a tube made of a soft material is attached, and the chucks 42, 43 may press the tube.

[0034] Opening and closing mechanism 40 allows resin material 13 extruded from discharge portion 12a to reach film 60 when chucks 42, 43 are in an open state, and blocks resin material 13 extruded from discharge portion 12a from reaching film 60 when chucks 42, 43 are in a closed state. Control unit 70 is connected to servo motor 31, drive unit 41, and detection unit 50, and can control the movement of pressing unit 32 and the opening and closing operations of chucks 42, 43 according to values ​​detected by detection unit 50.

[0035] Here, before describing the embodiments of the present disclosure in detail, comparative examples related to the embodiments will be described below.

[0036] [Comparative Example] Fig. 6 is a timing chart applied to a resin supplying device in a comparative example. Fig. 7 is a flowchart showing each step of resin supplying performed by the resin supplying device in the comparative example. Figs. 8 to 10 are cross-sectional views showing how the resin supplying device 100R in the comparative example supplies resin.

[0037] The resin supplying device 100R (FIG. 8) of the comparative example first reads set values ​​(predetermined weight and predetermined time) from a reference table or the like prepared in advance at time t0 (FIG. 6) (step t101 in FIG. 7). At time t0, the chucks 42 and 43 are in a closed state.

[0038] The set value of the "predetermined weight" referred to here is a value set as follows: The weight of the resin material 13 extruded from the discharge section 12a and supplied onto the film 60 is detected by the detection section 50 as a detected weight and sent to the control section 70. The pressing section 32 starts to move and resin is supplied onto the film 60, and when the weight of the resin supplied onto the film 60 reaches a predetermined weight, the movement of the pressing section 32 is stopped. The weight that is the threshold at which the movement of the pressing section 32 is stopped is the "predetermined weight" referred to here. The predetermined weight is set to a desired value as appropriate, taking into account the past implementation status of resin supply, etc.

[0039] Furthermore, the set value of the "predetermined time" referred to here is a value set as follows. After the movement of the pressing unit 32 stops, the drive unit 41 changes the chucks 42, 43 from the open state to the closed state when the predetermined time has elapsed. After the movement of the pressing unit 32 stops, the resin material 13 continues to be supplied onto the film 60 as drips until the drive unit 41 changes the chucks 42, 43 from the open state to the closed state (i.e., during the predetermined time). The "predetermined time" referred to here is the time until the drive unit 41 changes the chucks 42, 43 from the open state to the closed state after the movement of the pressing unit 32 stops. The predetermined time is set to a desired value as appropriate, taking into account past implementation status of resin supply, etc.

[0040] At time t1 ( FIG. 6 ), the pressing unit 32 starts moving (step t102 in FIG. 7 ). The amount of movement of the pressing unit 32 ( FIG. 6 ) gradually increases from amount a1, and the resin material 13 is extruded from the discharge unit 12a. While the resin material 13 has not yet reached the surface of the film 60, the weight w1 remains unchanged. At time t2, the resin material 13 reaches the surface of the film 60, and its weight begins to increase (weight w2, weight w3).

[0041] At time t3 ( FIG. 6 ), i.e., when the weight detected by the detection unit 50 becomes equal to or greater than the predetermined weight (YES in step t103 in FIG. 7 ), the movement of the pressing unit 32 is stopped (step t104). The movement amount of the pressing unit 32 hardly increases from the movement amount a3. As shown in FIG. 9 , even after the movement of the pressing unit 32 has stopped, the resin material 13 continues to drip from the discharge unit 12a, and the weight continues to increase (weight w3, weight w4).

[0042] 10 , at time t4 ( FIG. 6 ), i.e., when a predetermined time has elapsed since the pressing unit 32 stopped moving (YES in step t105 in FIG. 7 ), the driving unit 41 changes the chucks 42 and 43 from the open state to the closed state (step t106). Even after the chucks 42 and 43 are closed, the resin material 13 continues to be supplied to the film 60 as a drained resin (resin material that continues to be supplied to the film 60 due to the draining phenomenon), and its weight continues to increase slightly (weights w4 and w5). When the draining stops, the resin supply is completed (time t5 in FIG. 6 , step t107 in FIG. 7 ). If necessary, the next resin supply is performed on another film 60 (YES in step t108 in FIG. 7 ).

[0043] In the case of the above comparative example, the weight of the resin material 13 supplied onto the film 60 is brought close to a desired value by a predetermined weight and a predetermined time. It is possible to optimize the predetermined time in consideration of the past implementation status of resin supply, etc.

[0044] (Actions and Effects of Comparative Example) However, because the compressibility of a liquid resin material generally varies depending on environmental conditions, it is difficult to perfectly match the amount of movement of the pressing unit 32 with the dispensed weight of the resin material 13. Furthermore, even if the timing for stopping the pressing unit 32 is optimized according to the value of the predetermined weight, and the timing for closing the chucks 42, 43 is optimized according to the value of the predetermined time, the weight of the resin material 13 supplied to the film 60 by dripping and draining is likely to vary due to factors such as the physical properties of the resin material.

[0045] Furthermore, increasing or decreasing the "predetermined time" to bring the weight of resin material ultimately supplied to the object closer to a desired value tends to lengthen the cycle time. That is, when the pressing unit 32 is not moving, dripping occurs, which is a so-called waiting time. Because the amount of resin material 13 supplied is small, it takes time to bring the amount of resin material 13 supplied closer to the target weight. Furthermore, the method of increasing or decreasing the "predetermined time" does not necessarily make it possible to control the weight of resin material to the target value.

[0046] [Embodiment] In contrast to the comparative example described above, the resin supplying device 100 of the embodiment supplies resin as described below.

[0047] Fig. 11 is a timing chart applied to the resin supplying device in the embodiment. Fig. 12 is a flowchart showing each step of resin supplying performed by the resin supplying device in the embodiment. Figs. 13 to 16 are cross-sectional views showing how the resin supplying device 100 in the embodiment supplies resin.

[0048] The resin supplying device 100 (FIG. 5) of the embodiment first reads set values ​​(first and second predetermined values) from a reference table or the like prepared in advance at time T0 (FIG. 11) (step T101 in FIG. 12). At time T0, the chucks 42 and 43 are in a closed state.

[0049] The set value of the "first predetermined value" referred to here is a value set as follows: The weight of the resin material 13 extruded from the discharge portion 12a and supplied onto the film 60 is detected by the detection portion 50 as a detected weight and sent to the control portion 70. The pressing portion 32 starts to move and resin is supplied onto the film 60, and when the weight of the resin supplied onto the film 60 reaches the first predetermined value, the movement of the pressing portion 32 is stopped. The weight that is the threshold at which the movement of the pressing portion 32 is stopped is the "first predetermined value" referred to here. The first predetermined value is set to a desired value as appropriate, taking into account the past implementation status of resin supply, etc.

[0050] Furthermore, the set value of the "first predetermined value" referred to here is a value set as follows: Even after the movement of the pressing unit 32 stops, the resin material 13 continues to be supplied onto the film 60 as a drip. The weight of the resin material 13 supplied onto the film 60 is detected by the detection unit 50 as a detected weight and sent to the control unit 70. When the weight of the resin supplied onto the film 60 reaches the second predetermined value, the drive unit 41 changes the chucks 42, 43 from the open state to the closed state. The weight that is the threshold at which the drive unit 41 changes the chucks 42, 43 from the open state to the closed state is the "second predetermined value" referred to here. The second predetermined value is set to a desired value as appropriate, taking into account the past implementation status of resin supply, etc.

[0051] At time T1 ( FIG. 11 ), the pressing unit 32 begins to move (step T102 in FIG. 12 ). The movement amount of the pressing unit 32 ( FIG. 11 ) gradually increases from movement amount A1, and the resin material 13 is extruded from the discharge unit 12a. While the resin material 13 has not yet reached the film 60, the weight W1 remains unchanged. Because the discharge unit 12a has not yet drawn a pattern on the film 60, the pattern path length does not increase (length D1). At time T2, the resin material 13 reaches the film 60, and its weight begins to increase (weight W2, weight W4, weight W5). At time T3, the discharge unit 12a begins to draw a pattern on the film 60, and the pattern path length begins to increase (length D3, length D4, length D5, FIG. 13 ).

[0052] At time T5 (FIG. 11), that is, when the weight detected by the detector 50 becomes equal to or greater than the first predetermined value (YES in step T103 in FIG. 12), the movement of the pressing unit 32 is stopped (step T104). At this point, the resin material 13 has reached a weight W5.

[0053] In this embodiment, the pressing unit 32 is configured to perform a first movement M1 and a second movement M2 before time T5. The first movement M1 starts at time T1, and is changed to the second movement M2 at time T4 (FIG. 11) and continues until time T5.

[0054] That is, control unit 70 (FIG. 13) controls pressing mechanism 30 to cause pressing unit 32 to perform first movement M1, and also controls pressing mechanism 30 to cause pressing unit 32 to perform second movement M2 after first movement M1. Detection unit 50 detects the weight of resin material 13 extruded from discharge unit 14a and supplied onto film 60 while at least second movement M2 of first movement M1 and second movement M2 is being performed.

[0055] Regarding the timing of switching from the first movement M1 to the second movement M2, for example, the control unit 70 may cause the pressing unit 32 to perform the second movement M2 after the pressing unit 32 has performed the first movement M1, causing the pressing unit 32 to move a predetermined distance L1 (Figure 11) (movement amount A4).

[0056] 13 shows the state in which the pressing unit 32 is performing the first movement M1, and FIG. 14 shows the state in which the pressing unit 32 is performing the second movement M2. If the weight of the resin material 13 extruded from the discharge unit 12a and supplied per unit time onto the film 60 is taken as a reference weight, the control unit 70 may control the pressing mechanism 30 so that the reference weight while the pressing unit 32 is performing the second movement M2 is smaller than the reference weight while the pressing unit 32 is performing the first movement M1. With this configuration, the slope of the line between the weights W4 and W5 is smaller than the slope of the line between the weights W2 and W4.

[0057] At time T5 ( FIG. 11 ), i.e., when the weight detected by the detection unit 50 becomes equal to or greater than the first predetermined value (YES in step T103 in FIG. 12 ), the movement of the pressing unit 32 is stopped (step T104). At this point, the resin material 13 has reached weight W5. The movement amount of the pressing unit 32 hardly increases from movement amount A5. As shown in FIG. 15 , even after the movement of the pressing unit 32 has stopped, the resin material 13 continues to drip from the discharge unit 12 a, and its weight continues to increase (weight W5, weight W6).

[0058] 16 , at time T6 ( FIG. 11 ), i.e., when the weight detected by detector 50 reaches or exceeds the second predetermined value (YES in step T105 in FIG. 12 ), driver 41 changes chucks 42 and 43 from the open state to the closed state (step T106). Even after chucks 42 and 43 are closed, resin material 13 continues to be supplied to film 60 as a drained resin (resin material that continues to be supplied to film 60 due to the draining phenomenon), and its weight continues to increase slightly (weights W6 and W7). When draining stops, resin supply is completed (time T7 in FIG. 11 , step T107 in FIG. 12 ).

[0059] As shown in step T108 of FIG. 12 , the control unit 70 obtains the detected weight after the chucks 42, 43 are changed from the open state to the closed state and the resin material 13 is no longer being supplied onto the film 60, and changes at least one of the first and second predetermined values ​​based on the difference WD ( FIG. 11 ) between the obtained value and a preset target weight value. The changed value is stored in the setting value table ( FIG. 12 ). If necessary, the next resin supply is performed on another film 60 (YES in step T109 of FIG. 12 ).

[0060] (Functions and Effects of the Embodiment) In the above embodiment, the weight of resin material 13 supplied onto film 60 is brought closer to a desired value (target weight value) by the first predetermined value and the second predetermined value. That is, if the weight of resin material 13 extruded from discharge portion 12a and supplied onto film 60, detected by detection unit 50, is taken as the detected weight, the detected weight is monitored in real time or at predetermined time intervals, and pressing unit 32 is moved until the detected weight becomes equal to or greater than the first predetermined value.

[0061] As described in the comparative example above, adjusting the weight of resin material ultimately supplied to the object to a desired value by increasing or decreasing the "predetermined time" tends to lengthen the cycle time. In contrast, in this embodiment, the weight of the resin material dispensed due to dripping is also monitored after the pressing unit 32 stops moving. The detected weight is monitored in real time or at predetermined time intervals, and if the detected weight exceeds a second predetermined value after the pressing unit 32 stops moving, the chucks 42, 43 are changed from the open state to the closed state. This configuration can reduce variations in the amount of resin dispensed due to the physical properties of the resin material 13, improve the accuracy of the resin dispensed weight, and shorten the time required for resin dispense.

[0062] The control unit 70 acquires the detected weight after the chucks 42, 43 are changed from the open state to the closed state and the resin material 13 is no longer being supplied onto the film 60, and changes at least one of the first predetermined value and the second predetermined value according to the difference between the acquired value and a preset target weight value. In other words, by optimizing the first predetermined value and the second predetermined value based on the past implementation status of resin supply, it is possible to control the discharge amount of liquid resin with high precision and to suppress an extension of the cycle time, which in turn makes it possible to plan for an improvement in the quality and productivity of resin molded products.

[0063] Furthermore, in this embodiment, if the weight of resin material 13 extruded from discharge portion 12a and supplied onto film 60 per unit time is defined as a reference weight, control unit 70 may control pressing mechanism 30 so that the reference weight while pressing unit 32 is performing second movement M2 is smaller than the reference weight while pressing unit 32 is performing first movement M1. With this configuration, the slope of the line between weights W4 and W5 is smaller than the slope of the line between weights W2 and W4. With this configuration, the pressure remaining in storage unit 12 can be reduced after pressing unit 32 stops moving (i.e., the remaining pressure can be made closer to atmospheric pressure). This allows the next resin supply to be started at a pressure closer to atmospheric pressure, making it easier to supply a desired amount of resin, for example, in the initial stages of the next resin supply.

[0064] (Other Configurations) The chuck closing operation is performed when the target weight value is equal to or greater than a second predetermined value. Optimizing the second predetermined value results in, for example, changing the interval G2 between times T6 and T7 shown in FIG. 11 . It is preferable to automatically calculate an optimal value and feed it back to the second predetermined value so as to minimize the error.

[0065] Changing the first predetermined value changes the timing at which the movement of the pressing unit 32 is stopped (the interval G4 between times T5 and T7 shown in FIG. 11 ). In addition to optimizing the first predetermined value and the second predetermined value based on the past implementation status of resin supply, for example, the timing at which the pattern operation is started (the interval G1 between times T2 and T3 shown in FIG. 11 ) may be adjusted. Alternatively, the operating speed of the pressing unit 32 when performing the second movement M2, i.e., when moving the interval G3 shown in FIG. 11 , may be adjusted.

[0066] Also, for example, if the time during which the pressing unit 32 performs the first movement M1 is defined as the first time C1 (Figure 11) and the time during which the pressing unit 32 performs the second movement M2 is defined as the second time C2, the control unit 70 may control the pressing mechanism 30 so that the second time C2 is shorter than the first time C1.

[0067] Furthermore, if the time from when the control unit 70 stops the movement of the pressing unit 32 to when the control unit 70 changes the chucks 42, 43 from the open state to the closed state is defined as a third time C3 (FIG. 11), the control unit 70 may control the pressing mechanism 30 and / or the chucks 42, 43 so that the third time C3 is shorter than the second time C2.

[0068] Although the embodiments of the present disclosure have been described above, the embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present disclosure is defined by the scope of the claims, and it is intended to include all modifications within the meaning and scope of the claims.

[0069] 10 Cartridge, 11 Lid, 12 Storage section, 12a, 14a Discharge section, 13 Resin material, 18 Hardened resin, 20 Holding mechanism, 21 Peripheral wall, 22 Locking member, 23 Cylindrical section, 30 Pressing mechanism, 31 Servo motor, 32 Pressing section, 40 Opening and closing mechanism, 41 Drive section, 42, 43 Chuck, 50 Detection section, 52 Placement table, 54 Tray cover, 60 Film (supply object), 70 Control section, 80 Molding section, 81 Upper mold, 82 Bottom member, 83 Side member, 84 Elastic member, 85 Base plate, 86 Movable platen, 87 Lower mold, 88 Fixed platen, 90 Substrate, 91, 92 Conveying mechanism, 100, 100R Resin supply device, 101 Substrate module, 102 Press module, 103 Discharge module, 104 film module, 1000 resin molding product manufacturing apparatus.

Claims

1. A resin supplying device for supplying a resin material to an object to be supplied, comprising: a storage section for storing resin material and having a discharge section for discharging the resin material; a pressing mechanism having a pressing section inserted into the storage section and for pushing the resin material out of the discharge section as the pressing section moves; a detection section for detecting a weight of the resin material pushed out from the discharge section and supplied onto the object to be supplied; an opening and closing mechanism having a chuck configured to be able to form an open state and a closed state, the opening and closing mechanism allowing the resin material pushed out from the discharge section to reach the object to be supplied when the chuck is in the open state and blocking the resin material pushed out from the discharge section from reaching the object to be supplied when the chuck is in the closed state; and a control section for controlling the movement of the pressing section and the opening and closing operation of the chuck, the chuck is changed from the open state to the closed state when the detected weight becomes equal to or greater than a second predetermined value after the movement of the pressing portion has stopped.

2. The resin supplying device described in claim 1, wherein the control unit acquires the detected weight after the chuck changes from the open state to the closed state so that the resin material is no longer being supplied onto the object to be supplied, and changes at least one of the first specified value and the second specified value depending on the difference between the acquired value and a predetermined target weight value.

3. The resin supplying device described in claim 1 or 2, wherein the control unit controls the pressing mechanism to cause the pressing unit to perform a first movement, and controls the pressing mechanism to cause the pressing unit to perform a second movement after the first movement, and the detection unit detects the weight of the resin material extruded from the discharge unit and supplied onto the object while at least the second movement of the first movement and the second movement is being performed.

4. The resin supplying device according to claim 3, wherein the control unit causes the pressing section to perform the second movement after the pressing section has moved a predetermined distance by performing the first movement.

5. A resin supplying device as described in claim 3 or 4, wherein the weight of the resin material extruded from the discharge section and supplied per unit time onto the object to be supplied is taken as a reference weight, and the control section controls the pressing mechanism so that the reference weight while the pressing section is performing the second movement is smaller than the reference weight while the pressing section is performing the first movement.

6. A resin supplying device as described in any one of claims 3 to 5, wherein the time during which the pressing unit performs the first movement is a first time, and the time during which the pressing unit performs the second movement is a second time, and the control unit controls the pressing mechanism so that the second time is shorter than the first time.

7. The resin supplying device described in claim 6, wherein the time from when the control unit stops movement of the pressing unit to when the control unit changes the chuck from the open state to the closed state is a third time, and the control unit controls the pressing mechanism and / or the chuck so that the third time is shorter than the second time.

8. An apparatus for manufacturing a resin molded product, comprising the resin supplying device according to any one of claims 1 to 7.

9. A method for manufacturing a resin molded product using the resin molded product manufacturing apparatus described in claim 8, comprising the steps of: supplying the resin material to an object to be supplied by the resin supplying apparatus; and performing resin molding on the object to be supplied using the resin material.

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