TW200902290A - Mold clamping device and mold clamping device control method - Google Patents

Abstract

A mold clamping device includes an electromagnet which drives a mold clamping operation and a mold open/close drive unit. The mold open/close drive unit is variably controlled before a mold clamping force is generated by the electromagnet. Thus, it is possible to provide a mold clamping device which can reduce affects of the mold open/close drive unit in a mold clamping process.

Description

200902290 IX. Description of the Invention: [Technical Field] The present invention relates to a clamping device and a control method for a clamping device [photonic technique], in which an injection molding machine projects grease from an injection device, The molded product is obtained by filling the fixed mold and the movable mold, and striking the tree/solid. , fork eight space, and change Ding to take the mouth. Instead, the mold is moved to fix the mold and the mold is closed, pinned, and the movable _ even wedge is locked and the mold is opened. In the mold clamping device, although the iron right child has a hydraulic clamping type clamping device for the hydraulic cylinder, and is supplied. Driven by the electric clamping device of the helmet, the Q is the electric type-locking. The second chess device has good controllability, does not pollute the edge, and is energy efficient, so Often S, can be wood week

G_.^. _ . In this case, the 蕤A (four) motor is made to rotate the ball screw, and the thrust is made by the M H ή #士士, and the thrust is amplified by the toggle mechanism to generate a large clamping force. : It is an electric type-locking device of this structure. Due to the characteristics of the financial mechanism, the ρ mechanism is difficult to change the clamping force, and the responsiveness and the sturdiness are poor, and the helmet is smashed. Therefore, there is provided a lock-locking device which is constructed to directly use the thrust generated by the hunting snail as a lock force. In this case, because ^ is proportional to the torque of the motor and the clamping force, the clamping force can be controlled during the forming. ° In the δΛ 锁 锁 锁 , , , , 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚 滚In addition, it is necessary to supply 7杈41-9692-PF to the motor for the τ4 horse's lock-up force; Ahddub 5 200902290 gives the current, because the motor consumes more power and heat, so it needs to increase accordingly. The rated rim of the motor is carried out, and the cost of the clamping device is changed. Therefore, a misdirected device (for example, Patent Document 1) is considered, which uses a linear horse in the mold opening and closing operation and an electromagnet suction force in the mold clamping operation. [Patent Document 1] International Publication No. 05/090052 Manual [Summary of the Invention] [Problems to be Solved by the Invention] However, in the mold clamping device described in Patent Document 1 Λ ^, the mold is opened and closed independently. The drive unit tn is used as the drive unit (electromagnet) for the lock 4 and the lock. Therefore, if the timing of closing the mold and the timing of applying the clamping force are not properly controlled, there is a possibility that molding failure or mold 〃 & collar collar is generated. For example, in the mold closing step, the drive unit for opening and closing the mold is held to a predetermined position for speed control.

...4 enters the position control and makes mold contact. In this state, when the electromagnet is supplied with the A or the port motor, the driving portion for opening and closing the mold is intended to resist the clamping force of the electromagnet, and the position of A is maintained in accordance with the position control. Therefore, 'the electromagnet and the driving part for the mold opening are required to exceed the necessary electric power k', and the heat loss of the driving drive unit and the electromagnet for opening and closing the mold is increased by r〇J 73⁄4 °. The position control of the drive unit for opening and closing also has the possibility of adversely affecting the clamping force or the F-die of the platen. The present invention is directed to the above-mentioned problems, and the object of the present invention is to provide a clamping device and a mold-making method for locking the mold, and the clamping device can be lowered by 7〇41-9692-PF; Ahddub c 200902290 Low influence of the drive unit for mold opening and closing in the mold clamping step. [Means for Solving the Problem] Therefore, in order to solve this problem, the electromagnet and the mold are opened and closed, and the mold-locking device that drives the mold-locking operation and the opening and closing drive unit is characterized in that: / hunting the electromagnet Generate clamping force # ';贞Various force control variably controls the mold opening and closing drive r

L Da.: It is characterized in that the mold opening and closing drive portion is a linear horse, and a working portion that stops the supply of current to the linear motor when the mold is in contact. -7 is reversed. The month is characterized in that the mold opening/closing drive unit is rotated to have a control unit that stops supply of current to the rotary motor when the mold is in contact. Magnetic The invention is also characterized in that current is supplied to the electric iron before the mold is contacted. Further, the present invention is characterized in that no current is supplied to the S-hai linear motor during the period in which the electromagnet generates a clamping force. [Effect of the Invention] According to the present invention, it is possible to provide a method of locking a mold clamping device and a mold clamping device which can reduce the influence of the movable portion for opening and closing the mold in the mold clamping step. [Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Further, in the description of the present embodiment, the movement direction of the movable platen of the movable platen when the mold clamping device is inserted into the 7041-9692-PF; Ahddub 7 200902290 is set as the rear ==, and will be performed. When the mold is opened, the movement and injection device of the screw at the time of the injection are set to the rear of the moving direction of the rod. The first diagram showing the state of the present invention when the mold is closed is shown in the figure, and the second circle shows the shape of the mold and the mold clamping device and the mode of the mold clamping Iw. A diagram of the state of the device when it is opened. In the figure, 1 〇 is a clamping device, Fr is laid on the machine _ F ', the frame of the machine, the Gd is a silk road, and the lock is locked, and the guide you are guided! 3丨. Uncovering 罝1 〇, 2 guides: 2 guide rails of the guide member (in the figure, only one of the two guide Gd is dry), the η system is placed on the rack Fr and the guide Gd And n as the first fixing member, the fixing plate will be used as the second fixing member, and then the 疋13 7 7 〇 plate 13 is arranged and fixed; the η spacer is spaced apart, and the fixed platen is The tie rod 14 of the joint member ('4 (four) 2 pieces) is erected on the ... plate =: 堇 table ... tie bar "between one plate U and the back plate 13. In addition, the back plate 13 is placed on the guide rail (5) upper, so that the guide rail Gd can be slightly moved as the tie rod 4 is stretched and contracted. Further, in the present embodiment, although the fixed platen Π is fixed to the frame ,, the back plate 13 can be guided. ΓΗ You especially move the Gd slightly, but you can make the pair of h and the guide rail Gd fixed the backboard 13' and move the guide to the micro-movement

Fixed platen 11. M 12 is disposed along the tie rod 14 so as to be opposed to the fixed platen 11, and the movable table of the movable member is free to advance and retreat toward the mold opening and closing direction 7041-9692-PF/Ahddub 8 200902290. Therefore, a guide hole (not shown) through which the tie rod 14 is inserted is formed in a portion corresponding to the tie rod 4 of the "Hair movable plate" 12. A first screw portion (not shown) is formed at a front end portion of the tie rod 14, and the tie rod 4 is fixed to the fixed port plate 11 by screwing the j-th screw portion and the nut shank, respectively. A predetermined portion of the rear portion of the tie rod 14 has an outer diameter smaller than that of the tie rod 14, and the rear end of the guide post 21 of the second guide member is protruded rearward and is integrally formed with the tie rod 14. The second screw portion (not shown) is formed in the vicinity of the rear end surface of the back plate, and the second plate portion and the nut n2 are screwed together to connect the fixed plate U and the back plate 13 to the present embodiment. Although the guide post 21 and the tie rod are formed integrally, the core can be formed separately from the tie rod 4, and the fixed mold 15 as the i-th mold is fixed to the fixed platen: The movable mold 16 of the second mold is fixed to the advance/retraction of the platen 12, and the fixed mold 15 and the movable mold are moved close to or away from each other, and the mold is closed and the mold is clamped, and a plurality of unillustrated and π molds are used. As the movable mold is inserted and the space of the plate is formed between the fixed mold 15 and the middle, the injection nozzle 18 of the injection device 17 is ejected: a resin (not shown) as a molding material is filled in the respective cavities. Second, using a fixed mold of 150,000 cylinders; and a chess king. "The movable cooker 16 constitutes a mold device 19. And the adsorption plate 22 disposed as the movable a. _ is set to be the second movable member 攸 "before and after the background plate 3", and is guided by the guide post 2 to guide the guide post 21 The guide post 21 is freely opened. In the suction plate 22, the guide hole 23 for allowing the guide post to pass through is provided for the guide hole 23: each: a portion corresponding to the post 21. , 7041-9692-PF; Ahddub 200902290: The beaded scarf "2' and the small diameter portion 25' are attached to the rear end surface of the adsorption plate 22 and have a sliding surface that can slide with the guide post 21. In this embodiment Although the adsorption plate 22 is guided by the guide; ^ U. j, the adsorption plate 22 may be guided by not only the guide post 21 but also the guide rail Gd.

However, in order to advance and retract the movable platen 12, a linear motor 28 as a driving unit (mold opening/closing drive unit) for opening and closing the mold is disposed between the movable platen 12 and the frame. This linear motor 28 is available as a first! The fixing member 29 of the driving member and the movable member 3 as the second driving member are formed on the frame in such a manner as to be parallel to the guide rail and corresponding to the moving range of the movable platen 12, The lower end ' of the movable platen 12 is formed to face the fixing member (four) and to form the movable member 31 in a predetermined range. The mover 31 is provided with a core 34 and a coil 35. Further, the core 34 is provided with a plurality of magnetic poles #33 which protrude toward the fixing member 29 and are formed at a predetermined pitch. The coil 35 is wound around the respective magnetic pole teeth 33. Further, the magnetic pole teeth 33 are formed to be parallel to each other in a direction perpendicular to the moving direction of the movable platen 12. Further, the fixing member 29 is provided with a core (not shown) and a permanent magnet (not shown) which is formed to extend on the core. The permanent magnet is formed by magnetically alternating the magnetic poles of the N pole and the S pole and at the same pitch as the magnetic pole teeth 33. Therefore, when the linear motor 28 is driven by supplying a predetermined current to the coil 35, the movable member 31 advances and retreats. As the movable platen 12 advances and retreats, mold closing and mold opening can be performed. Further, in the present embodiment, the permanent magnet is disposed on the fixing member 7041-9692-PF; Ahddub 10 200902290, but the coil may be disposed. In this case, since the coil can be easily used to dispose the coil 35 to the movable member 31, the fixing member 'distributes the permanent magnet to the movable member without moving along with the linear motor 28, power Wiring for the coil. The movable platen 12 advances, and when the movable mold|housing 16 and the fixed mold 15 abut, the mold is closed, and then the mold is clamped. When the hammer is stapled, it will be used as the second drive unit and used as a mold clamping. The electromagnet unit 37 is disposed between the background plate 13 and the suction plate 22. On the other hand, the face and the palms are extended and extended through the background plate 13 and the suction plate 22, and the rod 39, which is a clamping force transmitting member, which is coupled to the movable △ rainbow plate 12 and the suction plate 22, is disposed to be freely advanced and retracted. When the mold 39 is closed and opened, the suction plate 22 is advanced and retracted with the movement of the movable platen 2, and the clamping force generated by the electromagnet unit 3 is transmitted to the mold clamping mode. The movable platen 12 is movable.

Further, the platen 22, the linear motor 28, and the die device 10 are fixed by a platen. U, the movable platen 12, the back plate 13, the electromagnet unit 37, and the rod 39 constitute a lock. H乍 is the electromagnet 49 of the first swaying member, and the adsorption unit 51 as the first “moving element” formed on the side of the adsorption plate 22, and the suction 99. _ ώ 丨 bl is formed in the adsorption... In the present embodiment, the portion of the suction plate that surrounds the rod 39 and faces the electromagnet 49. The predetermined portion of the end surface of the platen 13 will have an upper portion below and below the _ The cross section of the rectangle: = is formed in parallel with the two slots 45 of the housing portion so that the coils i are ordered from each other and will have a rectangular shape: 7041-9692-PF; Ahddub 11 200902290 The core 46 is formed in each slot 45 And the other part is formed, and the coil 48 is wound around the core 46. Further, the core 46 and the yoke 47 are formed by a single body structure, but In the present embodiment, the electromagnet 49 is formed separately from the backing plate 3, and the adsorption portion 51 is formed separately from the adsorption plate 22, but it is also capable of forming the thin plate of the ferromagnetic material. Forming an electromagnet in one part of the back plate 13 to adsorb one of the plates 22 Therefore, the adsorption portion is formed. Therefore, when the electromagnet unit 37 supplies a current to the coil 48, the electromagnet 49' is driven to adsorb the adsorption portion 51, and the clamping force can be generated. However, the rod 39 is disposed at the rear end. The portion and the suction plate 22 are continuous, and the front end portion is coupled to the movable platen 12. Therefore, the rod 39 advances as the movable platen 12 advances during mold closing, and advances the suction plate 22, and when the mold is opened, The movable platen 12 is retracted and retracted, and the suction plate 22 is retracted. Thus, the hole 41 through which the rod 39 is inserted is formed in the central portion of the back plate 13 and the hole for the rod 39 is penetrated. A bearing member Brl formed in a central portion of the suction plate 22 and slidably supporting a bushing or the like of the rod 39 is disposed to face the front end portion of the hole 41. Further, a screw 43 is formed at the rear end of the rod 39. The screw 43 is screwed with a nut 44 as a mold thickness adjusting mechanism that is supported to rotate the suction plate 22 freely. However, 'at the end of the mold closing, the suction plate 22 approaches the back plate 13, although the gap (5) Formed between the background plate 3 and the adsorption plate 2 2, but the gap becomes too When it is too large, the adsorption portion 5丨 cannot be sufficiently adsorbed, and 7〇41-9692-PF; Ahddub 12 200902290 becomes a small lock plate force. However, the optimum gap 变化 varies with the mold device 19. Therefore, a large-diameter gear (not shown) is formed on the outer surface of the nut, and a mold-type motor that is not used as a mold thickness adjustment is disposed on the suction plate 22'. Further, the gear having the small-diameter end and the gear formed on the outer peripheral surface of the nut 44 are attached to the mold-thickness adjusting motor, and the thickness of the mold device 19 is adjusted in accordance with the thickness of the mold device 19. When S ° is reached, the nut 44 is rotated by the screw 43 to adjust the position of the rod 39 to the horse attaching plate 22, and the position of the suction plate 22 to the fixed platen I and the plate 12 can be adjusted, and the gap 5 can be adjusted. Set to the best value. That is, the mold thickness is adjusted by changing the relative positions of the movable platen 12 and the suction plate 22. Further, the mold thickness adjustment motor, the gear, the nut 轲, the rod 39, and the like constitute a mold thickness adjustment skirt. Further, the gear constitutes a rotation transmitting portion that transmits the rotation of the mold thickness adjusting motor to the nut ο. Further, the nut direction and the screw 43 constitute a movement direction changing portion, and in the movement direction changing portion, the rotational motion of the nut ^ is converted into a linear motion of #39. In this case, the nut 44 constitutes the first conversion element, and the screw 43 constitutes the second conversion element. The control unit 60 controls the driving of the linear motor of the mold clamping device 1 and the electromagnet 49. The control unit 60 includes a CPU, a memory, and the like, and a circuit s which supplies a current to the coil 35 of the linear motor 28 or the coil 48 of the electromagnet 49 in response to the calculation result of the CPU. The load detector 55 is also connected to the control unit 6A. The load detector 55 is attached to the clamping device! That is, the predetermined position (at a predetermined position between the fixed platen u and the back plate 13) of at least one of the tie bars 14 is set, and the load applied to the tie bars 14 is detected. In the figure 7041-9692-PF; Ahddub 13 200902290, the load detector 55 which is placed on the upper and lower two tie bars 14 is shown as an example of the load detection. The sense of the elongation of the talent 14 is crying. The load detectors 5b, a t 、 , . The load transmission control detected by the structure 55 is omitted from the control unit 6〇 in the second diagram. Further, the operation of the mold clamping device 10 of this configuration will be described below. The control unit 6 〇$ @ s „ ΒΒ & modulo, and the opening and closing processing unit 61 controls the closing wedge + in the state of Fig. 2 (Ή 4 knot * ] town step ° ~, 4 bengs state), mold opening and closing The flow supply coil 35 is processed. The pile | ^ 0丄 is electrically connected to drive the linear motor 28, and can be advanced. As shown in Fig. 1, the movable plate 12 is in contact with the fixed plate 15 in the background. Ακςι , A gap Between the electromagnet 49 and the adsorption portion 51 is formed between the electromagnet 49 and the adsorption portion 51. Further, the force required to close the mold is much smaller than the clamping force. Next, the control portion 60 福, γ old 'lock 杈The processing unit 62 controls the mold clamping step. The mold clamping processing unit 62 supplies the current to the coil 48, and the adsorption/adsorption unit 51 is adsorbed by the adsorption of the electromagnet 49. 醏丄* 22 and the rod 39 transmit the clamping force to the movable platen 12, and the bin/-^ is ordered to lock the mold. Under this configuration, in the present embodiment, the sorrow 'starts the clamping process, and the species is proud & ^ f 4, when the clamping force is changed, the mold clamping processing unit 62 controls the clamping force to be used as a target for generating the change due to the change 1 and ,, that is, as the mesh The heart lock % force (hereinafter, the clamping force is referred to as "steady state mode locking", and the value of % current (hereinafter referred to as "rated current") is supplied to the coil 48. The detector 55 detects the clamping force. The detected mode-locking and the transmission control unit 60 adjusts the current supplied to the coil 48 by the control unit 60 and performs feedback control so that the clamping force becomes a set value. During this period, the resin melted in the injection device 17 is injected from the injection nozzle 18, and is filled with 7〇41-9692-PF; Ahddub χ 200902290 in each cavity space of the mold device 19. Name ^才莫穴$门向树脂When cooling to become a solid, the mold opening and closing portion ... controls the mold opening step. The mold clamping processing portion 62 stops the supply of the current to the coil 48 in the state of the Fig. Fig. Fig., the linear motor 28 is driven, and the movable platen is driven. 12 retreat, such as 坌 9 cabinet _, Η 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如1 The mold closing step of the embodiment and the action of the mold clamping device of the mold clamping step = The graph shown in Fig. 3 indicates four broken lines or curves. The graph and the axis table τι· are common to each fold line or curve system (elapsed time). The vertical axis of the shape varies depending on each fold line or curve. The torque wheel output terminal of the linear motor 28 outputted from the mold opening/closing processing unit 61 of the control unit 60 has an output limit (limit value). With respect to the fold line a, the vertical glaze indicates a torque value. A starts with κ ± _ line b indicates The position of the movable yoke plate 12 moved by the linear motor 28 is used. The vertical axis indicates the position with respect to the u white core c. The broken line C indicates the command value of the clamping force outputted from the mode-locking process 62 of the control unit 60. The curve d is not represented by the load detector _ w m, then the actual value of the locking wedge force. The vertical axis about the broken line C and the curve d' indicates the magnitude of the clamping force. In the figure of Fig. 3, glare, between 4 1:1 and ΐ2, is equivalent to the closed mold step. That is, the mode locking device 1 is in the state shown in Fig. 2 at the time gate + 7 ^, and becomes the first at time t2! The state shown in the figure. In Fig. 3, the closed-circuit step consists of a sum of ρ μ ^ .^ from the 间 and the low pressure interval. At the time 仂, when the current is supplied to the coil 35 according to the control of the re-winding m q, ° 卩 61 at the mold opening and closing, the squatting interval starts. As shown by the fold line a, from the 7041-9692-PF; Ahddub 15 200902290, the board opening/closing processing unit 61 rotates the content of the linear motor 28 to make the torque output electrode become the maximum command. As a result, as shown by the curve b, the movable platen 12 moves at a high speed toward the square (the direction in which the mold contacts the position). In cooperation, the flaw between the backboard 13 and the suction plate 22 also reduces the amount of linear motor 28: By moving the movable platen 12 at a high speed in the running section, the forming cycle can be shortened, and productivity can be improved. When the mold opening and closing processing unit 61 detects that the position of the movable platen 12 has reached the preset low pressure start position (the starting position of the low-level position), the internal opening is input to the linear motor 28 to lower the torque output limit to the preset state. Torque value (low pressure torque) command. Further, a position detector such as an encoder (not shown) is provided in the linear motor 28, and information indicating the position of the linear motor 28 (that is, the position of the movable platen 12) is input from the position detector to the control unit. Torque output limit, and the mold is prevented from being damaged between the molds. In combination, as shown by the curve b, the movable platen speed (the forward speed becomes slow). The movable platen 12 (linear motor 28) is fully decelerated to: Position control is performed in a state in which the mold is placed at a level such as damage to stop at the mold contact position (clamping start position). Here, in the present embodiment, the mold-contact position, & The position of the movable platen 12 at which the clamping step should begin. As shown by the broken line 3, the mold opening and closing processing portion variably controls the linear motor 在 at the movable platen 12 to reach the mold contact position _t2, and the lock force is generated to be just (and before or during generation). Specifically, the position control of the linear stirrup 28 is released. The position control is released by stopping the supply of current to the coil 35 of the linear motor 28 by the drive stop processing unit (not shown) in the mold opening/closing processing unit 61. Further, the position control can be released by a command to drive the linear motor 28 to the linear motor 28 by the 16 7041-9692-PF; Ahddub 200902290 drive stop processing unit to set the torque output limit to 〇. After time t2, equivalent to the mode-locking step w, as indicated by the fold line c, at the mold contact position (time seven), the mold-locking process rotates the buckle for generating the steady-state clamping force. In response to this instruction, the forehead current is supplied to the coil 48 of the electromagnet 4 9 to generate an electromagnetic force in the gap 5 between the background plate 3 and the suction and the second plate 22. Therefore, as shown by the curve d, the electromagnetic force generated by the Leiwei by the electromagnet 49 increases, and the clamping force generated by the mold device 19 also increases. As shown by the curve d, the clamping force continues to increase thereafter, 达到 reaches the steady state clamping force at time ts, and thereafter, maintains the steady clamping force during the clamping step. The section from the clamping force of the range of from ^ to seven to the steady state clamping force becomes the step of boosting in the mode locking step. As described above, according to the i-th embodiment, the position control of the linear motor 28 is released at the timing of the start of the mold clamping step. Therefore, the mold clamping device 10 is not affected by the position control of the linear motor 28, but can be highly efficient (the clamping force is generated j. Moreover, the heat generation of the linear motor 28 can be prevented. In addition, the clamping force can be prevented. Alternatively, the adverse effect of the parallelism of the movable platen 12 may occur. Here, it is not necessary to bring the mold device 19 into contact at the mold clamping start position, or before the fixed mold 15 and the movable mold 16 abut. The position of ^ stops the linear motor 28 and applies an electromagnetic force between the gaps 5 to cause the mold clamping to start. In this case, since the supply of the current is released to the linear motor 28 at the mold clamping start position, it becomes the linear motor 28 A state in which a driving force is generated. By generating an electromagnetic force between the gaps 5 in this state, the movable mold 16 is advanced from the mold clamping start position to the mold contact position, and is in contact with the fixed mold 7041-9692-PF; Ahddub 17 200902290 15 Next, a second embodiment will be described. Fig. 4 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping step in the second embodiment, and the same portion as in Fig. 3 Attach the same symbol The description is omitted, and the same is true for the items that are not particularly noted. "1" is applied to Fig. 4, and the broken line C1 indicates the command value of the clamping force outputted from the mold clamping processing unit 控制 of the control unit 6A. Further, the curve di indicates the actual value of the clamping force detected by the load detector 55. As shown by the broken line C1, in the second embodiment, the time from the arrival of the contact position of the mold (to the time after the lapse of the predetermined time) h, the mold clamping processing unit Μ outputs an instruction for generating a steady-state clamping force. According to the command, the coil 48 of the electromagnet 49 is supplied with a rated current, as shown by a curve, and the mold is generated by the electromagnet 49. Here, although the mode-locking step is from the moment of reaching the mold (four), but since the clamping force is applied to the mold from t3, the step of boosting starts from seven. Therefore, the step of clamping is started from 仂. # According to the second embodiment, the clamping force is generated by the electromagnet to the mold, and then the linear motor is at the beginning of the clamping step.

The position control is variably controlled and has been removed. Therefore, the same effects as those of the first embodiment can be obtained. Further, in Fig. 4, the value of A pull-free Matter is not limited for a predetermined time from time t2 to time ^. If productivity is considered, short is better. That is to say, the second embodiment is different from the 矣+ ★ & & amp 表 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性 线性Thus, by setting a predetermined time between the arrival of the 7041-9692-PF; Ahddub 18 200902290, the contact position, and the generation of the clamping force, the position of the (4) Malian 28 and the lock of the electromagnet 49 can be locked. The control of the mold force does also open, so that the heat generation of the linear motor 28 can be reliably prevented. The third form of application in the eighth month. Fig. 5 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping step in the third embodiment. In the fifth embodiment, the same reference numerals are given to the same portions as those in the third embodiment, and the description thereof will be omitted. X, regarding matters not specifically stated, may be the same as in the first embodiment.

In Fig. 5, the broken line C2 indicates the command value of the clamping force output from the mold clamping processing unit 62 of the control unit 60. Further, the curve (4) shows the actual value of the clamping force detected by the load detector 55. As shown in the detection benefit line C2, in the third embodiment, pre-boosting is performed. That is, the mold clamping processing unit 62 # 1+ @ Η μ # * starts supplying current to the coil 48 of the electromagnet 49 at the time (contact time (1)) at the time of contact with the mold. On the other hand, as shown by the curve; 12, the clamping force is generated after the contact of the mold. In the third embodiment, the mode-locking step starts from time t2, because current is supplied to the coil 48 (for pre-boosting) before the clamping force is generated, so that it is at a position earlier than the mold contact position. A magnetic field has been generated between the adsorption plate 22 and the back plate 13. Then, as the linear motor 28 approaches the mold contact position, the gap between the back plate 13 and the suction plate 22 also becomes smaller. Therefore, the magnetic flux density generated between the spaces (four) is the same. The electromagnetic force generated between the centers also becomes larger as it approaches the mold contact position. @, when the linear motor 28 reaches the mold contact position, an electromagnetic force is generated between the gaps 5. As a result, the increase in the clamping force generated in the mold after the contact of the mold becomes 19 7041-9692-PF; Ahddub 200902290 is fast, and can be shortened to the time of reaching the steady state clamping force. That is, the slope ratio of the curve core is larger for the slope of the curve d shown for reference. Thus, the cycle time can be shortened. On the other hand, at the timing (t2) at which the mold contact position is reached, the position control of the linear motor 28 is released. That is, the linear motor 28 is variably controlled at the timing of the start of the mold clamping step. Specifically, the position control of the linear motor 28 is released. Therefore, in the third embodiment, the linear motor 28 can be variably controlled before the clamping force is generated, and the same effects as those of the first embodiment can be obtained. In the present embodiment, the electromagnet 49 is formed on the rear end surface of the back plate 13, and the adsorption portion 51 is disposed to be advancing and retracting toward the front end surface of the suction plate 22 so as to face the electromagnet 49. The portion is disposed on the rear end surface of the back plate 13, and is disposed on the front end surface of the suction plate 22 so that the electromagnet can advance and retreat so as to face the adsorption portion.

Further, the method of controlling the mold clamping device of the present embodiment may be a mold clamping device that does not perform the mold opening and closing operation by the driving of the linear motor 28. Especially in the case of the linear motor 28, since the magnet is exposed on the surface of the frame, dust or the like may adhere. Therefore, Fig. 6 shows a modification of the present invention in which a rotary motor which uses a motor frame to block a magnetic field generation region without using the linear motor 28 as a mold opening/closing drive portion. The description of the electromagnet unit as the second driving unit is omitted from the drawings and the second drawing. The opening/closing motor 74, which is a drive unit (mold opening/closing drive unit) for opening and closing the mold, is attached to a motor support fixed to the frame. Here, the mold opening and closing motor 7 4 applies a rotary motor in which the motor frame blocks the generation region of the magnetic field 7041-9692-PF; Ahddub 20 200902290. The motor shaft is connected from the shaft and the ball screw shaft 72. ...to stand out, motor m φ- 71 ^ /V, mouth # 〉 珠 螺杆 screw shaft 72 mouth, dream # 41 4 day screw U screw, and constitute (four) moving horse 2 and / 衮 螺 screw in a straight line The movement direction change and the rotational motion transformation method are rotatably arranged in the self-moving reverse, ❿' ball screw nut Ή rimless portion I, and the movable platen projection protruding from the lower part of the nightmare is rotated by the cooker opening and closing motor 74 The plate 12 is rotatable forward and backward, and the movable table $ turns the mold opening and closing operation of the mold 16. Further, the position detector 75 is attached to the rear end of the rotation angle of the die opening/closing motor 74 for opening and closing the mold ** and the movable platen is grasped. (4) The 'mold_processing unit 61 controls the opening and closing of the mold, Ϊ the occurrence of the clamping force by the electromagnet on the mold device 19. After the v: r pressure, there is no need to worry about the positional deviation of the mold. The ground control supplies the current of the horse for opening and closing the mold. Specifically, the supply current is stopped. Therefore, the influence of the mold opening and closing force on the mold clamping force caused by the position control of the mold opening and closing disappears by 0 曰 or more. Although the embodiment of the present invention is described in detail, the present invention is not limited to this: In the embodiment, various modifications and changes can be made without departing from the spirit and scope of the invention. This International Patent Application claims the priority of Japanese Patent Application No. 20-7-1651, filed on May 23, 2007. 21 7041-9692-PF; Ahddub 200902290. [Brief Description of the Drawings] Fig. 1 is a view showing a state in which the mold apparatus and the mold clamping apparatus according to the embodiment of the present invention are closed. The second drawing shows a state of the mold apparatus and the mold clamping apparatus according to the embodiment of the present invention at the time of mold opening. Fig. 3 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping step in the first embodiment. Fig. 4 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping C step in the second embodiment. Fig. 5 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping step in the third embodiment. Fig. 6 is a view showing a modification of a rotary motor to which a region where a magnetic field is generated is blocked by a motor frame. [Main component symbol description] 10-locking device; 11~ fixed platen; 12~ movable platen; 13~back plate; tie rod; 15 ~• fixed mold; 1 6~ movable mold; 17~ injection device; • injection nozzle; 19~ mold device; 2 guide column; 2 2~ adsorption plate; 23~ guide hole; 2 4 ~ large diameter portion; 2 5~ small diameter portion; 2 8~ linear motor; 31~ movable member; 7041-9692-PF; Ahddub 22 200902290 3 3 ~ magnetic pole tooth; 3 4~ core; 3 5 ~ coil; 37~ electromagnet unit; 39~ rod; 41~ hole; 42~ lifting assembly; 43~screw; 44~nut; 45~slot; 4 6~ iron core; 47~car; 4 8~coil; 49~electromagnet; 51~adsorption section; 5 5~load detector; 6 0~ control section; 61 ~ mold opening and closing processing section; 6 2 ~ mold clamping processing section; 5 ~ gap η 1 ~ nut; Brl ~ bearing member; Gd ~ rail; Fr ~ rack. 70 7041-9692-PF; Ahddub

Claims (1)

200902290 X. Patent application scope: 1. A clamping device with an electromagnet that drives a clamping action and a mold opening and closing driving portion, 'characterized by: variably controlling the opening and closing drive of the mold before the clamping force is generated by the electromagnet unit. 2. The mold clamping device of claim 1, wherein the mold opening and closing drive portion is a linear motor; - a control #' is provided which stops the current supply to the linear motor when the mold contacts. " 3. For example, the mold-locking device of the patent application (4), wherein the mold opening and closing drive unit is a rotary motor; and a control unit is provided, which supplies a current to the rotary type when the mold is in contact. < IT 4. As claimed in the patent specification 2 θ ^ ^ , a mode-locking device in which a current is supplied to the electromagnet from the time of the i. 5. The mold clamping device of claim 2 or 3, wherein the electromagnet is supplied with current before the mold is contacted. 6. For example, in the case of applying the model (4), the clamping device, in which the (4) feed motor is not supplied with current by the clamping force of the electromagnet. 7. A control method for a mold clamping device, wherein the child lock chess device has an electromagnet that drives a lock action and a mold opening and closing drive portion, wherein: the mold clamping force is variably generated by the electromagnet Control the mold opening and closing 7041-9692-PF; Ahddub 200902290 drive. 8. In the mold clamping device according to item 7 of the (7) patent (10), the mold opening and closing drive unit is a linear motor; the table is provided with a control unit that gives a current to the electrician. The linear motor is stopped when the core is in contact. 9. The mold opening and closing drive unit is a rotary type motor in the mold clamping device of the seventh aspect of the patent application; and the control unit is provided with a control unit for supplying a current to the mold. When the mold is in contact, the rotary motor is stopped. 10_ As for the patent scope method, the predetermined time is obtained when the control mold of the mold clamping device of the mold is contacted. The iron begins to supply current to the control mode of the mode-locking device as described in the patent application No. ^ ^ ψ A-tr·, which supplies current to the electromagnet after the cookware contacts. 12 · As in the scope of the patent application, the control method of the mold clamping device generated by the electromagnet is flowed. No power is supplied to the linear motor during the clamping force 7041-9692-PF; Ahddub 25