TWI359731B - - Google Patents

Description

1359731 IX. Description of the Invention: [Technical Field] The present invention relates to a clamping device and a control method for a clamping device. [Prior Art] A furnace is used in an injection molding machine to project a tree from the injection nozzle of the injection device. And it is filled with 151 $ θ eucalyptus... The cavity space between the mold and the movable mold, and becomes the mouth body, hunting for the molded product. Instead, the mold is placed to move the fixed mold and ι, so that the movable xenon lamp is closed and locked. In the 5 hp mode-locking device, although the autumn "丄..., there is a hydraulic-type clamping device driven by the oil supplied to the hydraulic cylinder, and the electric clamping device by the νθ H ^ ^ , :疋Because the controllability of the electric clamping device is good, it will not

Side, and energy efficiency is high, the D drive I "4 a. In this case, by rotating the motor to make the (four) screw structure to enlarge the poetic force, and generate a large lock f force, and then use the financial machine because : γ ΓΓ 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动 电动:Second: Cheng can use the thrust generated by the ball screw directly as the lock ^ _y, ... the torque is proportional to the clamping force, so the clamping force can be controlled during the forming. Not only: the previous clamping device' The ball screw has low load resistance, and it is not only unable to produce a large clamping mode, but also because the torque of the motor changes, and the locking force changes. Moreover, in order to shy the clamping force, the motor needs to be directly supplied.

7041-9688-PF gives current, because the motor's ground increases the rated number of wheels and the amount of heat generated by the motor, so it needs to be matched. Therefore, the type of lock is ==_ expensive. The opening and closing action is linear, as in the patent literature. The mold is attached. In the mode-locking action, the electromagnet is sucked [Patent Document 1] International Eight pg. & Difficulty A K5/090052 Handbook [Invention] [The problem to be solved by the invention] & The clamping device described in 1 is provided separately for each of the mold opening and closing vine devices, ## % ^ ^ and the drive unit (electromagnet) for the lock. Therefore, the right is not properly controlled to close the mold. The order of the mouth and the timing of applying the clamping force, and the occurrence of poor molding or damage to the mold, etc., can be used to open and close the mold before entering the mold clamping step. When the torque limit value of the drive unit becomes 0 (when the power is turned on - X . 5 ^ ..., when the drive unit for opening and closing stops supplying power), the electric power of the clamping force is 66 ^ m ^ n. θ should be biased in the mold and position where the position control has been performed. Therefore, it is difficult to generate a clamping force at the position where ^ _ Α μ ^ is scared, and the molding failure as described above may occur. In particular, in the ultra-high precision forming, there is a method in which ^ 6 Α ρ. _ , , Λ / I is formed by the opening of the tree 曰 before the locking force is applied. In this case, it is necessary to count the positional control of the level higher than the degree, even with a slight amount of mold #f #1; only the deviation can not be ignored. The present invention is based on the above problems and the developer aims to provide a lock. The mold device and the mold clamping device are in the "heart 7 control method". The mold clamping device can grasp the position of the lock generating force in the relationship between the driving portion for opening and closing the mold.

7041-9688-PF 7 degrees. [Means for Solving the Problem] Therefore, in order to solve this problem, the present invention relates to an electromagnet that drives a mold clamping operation and a mold opening and closing drive unit <locking device, characterized in that - the electromagnet is generated incorrectly The mold opening and closing drive portion can be controlled by the mold clamping force. Further, the feature of the present invention is that the "Dan 模具 兮 目 Θ Θ Θ Θ Θ 亥 Θ Θ 模具 Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ Θ The current required. Further, the present invention is characterized in that the current of the position control f is supplied to the linear motor in the step of boosting the burial magnet. Further, the present invention is characterized in that the current is supplied to the linear motor until the clamping force of the electromagnet becomes a predetermined value. Further, the present invention is characterized in that the predetermined value is larger than the locking force of the linear motor. ▲ The invention is characterized in that after the clamping force becomes a predetermined value, the supply of current to the linear motor is stopped. Further, the present invention is characterized in that after the clamping force is generated by the electromagnet, the current is supplied to the linear motor for a predetermined period of time. [Effect of the Invention] According to the present invention, it is possible to provide a mold clamping device and a control method for the mold clamping device. The accuracy of the D-locking device in the position where the mold opening and closing drive is used to generate the clamping force.

[Embodiment] 7041-9688-PF 8 乂, - face refers to the surface of the picture..., state. In addition, in the present embodiment, the movement of the movable platen when the mold is closed in the embodiment of the present invention will be described in detail. For the mold clamping device, the moving direction of the movable platen in advance is set to be different, and will be performed. When the mold is opened, the injection sample >A^日" rear is used. For the injection device, the movement r1 of the screw that emits the reverse % is set to the rear of the screw. In the other hand, when the measurement is performed, the:::: 广 _ _ _ _ _ 。 模 。 。 。 2 2 2 2 2 2 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The second:: the system is set, the Fr is the frame of the injection molding machine, and the Gd n-hai frame Fr constitutes the track, and supports the clamping device 1〇, and guides it as the first! Two guides of the guiding member (in the figure, only one of the two guides Gd) '11 is placed on the guide rail Gd, and the frame Fr and the guide rail Gd are fixed as the Jth The fixed platen of the fixing member will serve as the second fixed member after the platen! 3 is disposed so as to be spaced apart from the fixed platen 11 by a predetermined interval, and is opposed to the fixed platen, and 4 are used as the tie bars 14 of the joint member (in the figure, only the four tie bars 14 are shown 2) is mounted between the fixed platen and the backboard 13 . Further, the back plate 13 is placed on the guide rail Gd so that the guide rail Gd can be slightly moved in accordance with the expansion and contraction of the tie bar 14. Further, in the present embodiment, although the fixed platen 11 is fixed to the frame Fr, and the back plate 13 can slightly move the guide Gd, the back plate 13 can be fixed to the frame Fr and the guide rail Gd, and the guide Gd is fixed. Move the solid platen 11 slightly. 7〇4l-9688-PF 9 The distal rod 14 is a movable platen as the first movable member, and is opposed to the fixed platen 11, and is freely opened and closed in the mold opening and closing direction. Therefore, a guide hole (not shown) through which the tie bar 14 is inserted is formed in a portion of the movable platen 12 corresponding to the tie bar U. An i-th screw portion (not shown) is formed at the front end portion of the tie rod 14, and the stem 14 is made by the first! The screw portion and the nut μ are screwed and fixed to the fixed platen: 1. Further, (4) a predetermined portion behind the tie bars 14, the outer diameter, the dry end 4, the rear end of the guide post 21 of the second guide member, the rear end of the back plate 13 projecting rearward, and formed integrally with the tie bar 14_. The second screw portion (not shown) is formed in the vicinity of the rear end surface of the back plate 13, and the fixed plate u and the back plate η are connected by screwing the second screw portion and the nut n2. In the present embodiment, the guide post 21 and the system #14 are integrally formed, but the guide post 21 may be formed separately from the tie bar 14. The fixed mold i 5 as the first cooker is fixed to the fixed platen, and the movable mold 16 as the second mold is fixed to the movable platen. The fixed platen 15 and the movable die 16 are fixed and retracted. Close or move away from 'moulding, mold clamping and mold opening. Further, as the mold clamping is performed, a plurality of cavity spaces (not shown) are formed between the fixed mold and the movable cooker 16 as a molding material which is emitted from the injection nozzle 18 of the injection device 17 as a molding material. The resin is filled in the cavity spaces. Further, the mold unit 19 is constituted by the fixed mold 15 and the movable mold 16. Further, the suction plate 22', which is disposed as a second movable member in parallel with the movable platen 12, is disposed behind the back plate 13 so as to be freely advanced and retracted along the guide post 21 and guided by the guide post 21. In addition, in the adsorption plate 22, it will be used

7041-9688-PF 10 丄 "9731 A guide hole 23 through which the guide post 21 is inserted is formed at a portion corresponding to each of the guide guide pillars 21. The μ guide hole 23 is provided with a large diameter portion 24 which is formed on the front end surface to machine the door opening: an underfill ball nut η2; and the small diameter portion 25' is attached to the rear end surface of the adsorption plate 2 to have an opening and a guide. The slide surface of the column 2丨 slides. In the present state, although the adsorption plate 22 is guided by the guide post 21, the suction plate 22 is guided by the guide rail Gd. In addition, in order to advance and retreat the movable platen 12, the linearity of the drive unit (mold opening/closing drive unit) for opening and closing the mold as the first drive angle is set to the movable platen 12 and Between the machine "Γ. The linear motor u is provided with a fixed drive member as a first drive element and as a second drive base member 31, and is formed on the δ mysterical frame Fr in parallel with the guide Gd and corresponding to the movement range of the movable ... The fixing member = the movable member is formed at a lower end of the movable platen 12 so as to be opposed to the fixing member 29 and located within a predetermined range. The mover 31 is provided with a core 34 and a coil 35. Further, (4) the core 34 " has a plurality of magnetic pole teeth 33 which protrude toward the fixing member 29 and are formed at a predetermined pitch, and the coil 35 is wound around the respective magnetic poles *33. Further, the magnetic waves 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 which is 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. Here, since the linear motor 28 uses a permanent magnet, the magnetic field formed between the fixing member 29 and the like can form a strong magnetic field. due to

7041-9688-PF 1 Coffee 731 The strength of the magnetic field is strong, and the magnetic force of the permanent magnet generates a locking force at the locking position of the movable member 31. The (five) m-line® 35 supplies a current that overcomes the locking force. _ . : However, when the linear current is driven by supplying a predetermined current to the line 35, the movable member advances and retreats. With the movable platen .12 moving forward and backward, the mold can be closed and opened. In the external lean mode, although the permanent magnet is disposed on the fixing member 9=the coil 35 is disposed on the movable member 3, but the coil can be disposed on the crucible, and the permanent magnet is disposed on the movable member without driving. The squat bow is up to 28 and the coil is the force of the coil. Therefore, it is easy to use the wiring for supplying power to the . When the platen 12 is moved forward, and the movable die 16 and the fixed die 15 abut, the mold is closed, and then the first? In order to perform the mold clamping, the boat ^ H @ ' will be used as the driving portion of the horse 2 and as the electromagnet unit 37 provided on the background plate 13 and the moving portion, and the suction plate 22 D is attached to the plate 22 . However, it will extend through the back plate 13 and the attachment plate 22, and the rod I of the clamping force transmitting member: when the mold is opened and the mold is opened, and the movable & plate is free to advance and retreat. The rod 39 is closed and retracted, and at the time of mold clamping, the advancement and retreat of =12 are interlocked, and the suction plate is moved to the movable platen 12. The clamping force generated by the electromagnet unit is transmitted to the other, by the fixed plate attachment plate 22, the linear motor °2 magnetic platen plate ... the back plate (1) suction molding device 1 铁. Iron early 711 37 and rod 39, etc. The electromagnet unit 37 is constituted by Zhang Shi, from μ; the back side of the back panel 1 3 as the first drive

7041-9688-PF 12 1359731

The electromagnet 49' of the movable element and the adsorption unit 51 as the second drive element formed on the side of the adsorption plate 22, and the adsorption unit 51 is formed in a predetermined portion of the end surface of the adsorption plate 22, and is adsorbed in the present embodiment. The plate a surrounds the rod 39' and is opposed to the electromagnet 49. Further, in a predetermined portion of the end surface of the back surface plate 13, in the present embodiment, a rectangular cross-sectional shape is formed as a coil: the two grooves 45 of the installation portion are formed parallel to each other. A core 46 having a rectangular shape is formed between the grooves 45, and the vehicle 47 is formed in other portions. The coil 48 is wound around the core 46. Further, the core 46 and the yoke 47 are formed of a single body structure, but may be formed by laminating thin plates made of a ferromagnetic material to form an electromagnetic laminated steel sheet. In the present embodiment, although the electromagnet 49 is formed separately from the back plate 13, and the adsorption portion 51 is formed separately from the adsorption plate 22, the electromagnet can be formed in part of the back plate 13 to form an adsorption portion of the adsorption plate 22. unit. Therefore, when the electromagnet unit 3 7 supplies current to the coil 48, the electromagnet 49' is driven to adsorb the adsorption portion 5 to generate the clamping force. Further, the 4-cylinder 39 is disposed so as to be continuous with the suction plate 22 at the rear end portion, and is coupled to the front movable platen 12 at the front end. Therefore, when the rod 39 is closed, the movable plate 12 is further pushed in, and the suction plate 22 is advanced. When the mold is opened, the movable yoke 12 is retracted and retracted, and the suction plate 22 is retracted.

Thus, a hole 41 through which the rod 39 is inserted is formed in the center of the back plate 13. Ρ/knife, and a hole 42 through which the rod 39 is inserted is formed in a central portion of the suction 7041-9688-PF 13 cut 9731 = 22, and a bearing member W such as a bushing of the support rod 39 is slidably supported It faces the front end of the hole 41. That is, the screw 43 = the rear end portion of the rod 39, and the screw 43 is screwed to the nut as the mold thickness adjusting mechanism which is supported to freely rotate the suction plate 22. However, 'at the end of the mold closing time' the adsorption plate 22 is close to the background plate W, and the gap 6 is formed between the back plate 13 and the adsorption plate 22, so that the knot is too small or too large to be sufficiently sucked. : The clamping force becomes smaller. In addition, the optimum gap continues to change with the mold device 19. Therefore, a large-diameter gear (not shown) is formed on the outer circumference of the nut 44 and becomes a driving portion for adjusting the thickness. The mold thickness adjustment (not shown) is attached to the discharge of the mold thickness adjustment motor by the 'mountain suction plate 22', and the wheel formed on the outer circumferential surface of the nut 44 is spliced. , 'in the thickness of the cookware device 19, the drive mold thickness is up, when the nut 44 is rotated about the screw 43, the position of the adjustment rod 39 = :=22.' and the adsorption plate is adjusted to the fixed platen] The position of 1 2, can be asked by Lu You < J move σ move two; ^ the best value. That is, the mold thickness is adjusted by changing the relative position of the adsorbable plate 22. Further, the mold thickness adjusting motor, the gear 39, and the like constitute a mold thickness adjusting device. Further, the gear constitutes a rotation transmitting portion that rotates the nut for adjusting the nut thickness of the nut. On the other hand, the rotational movement of the wire by the nut 44 = 43 constitutes the motion direction changing portion, and the rotational motion of the wire is converted into the linear motion of the rod 39. In this case, 44 44 constitutes a second transform element, and the screw 43 constitutes the first tired cap.

7041-9688-PF 14 1359731 The control unit 60 controls the driving of the linear motor 28 and the electromagnet 49 of the mold clamping device 1A. The control unit 60 is provided with a CPU, a memory, and the like, and is provided with a circuit that supplies a current to the coil 35 or the electromagnet 49 of the linear motor 28 in response to the CPU's calculation of the gentleman's fruit. Coil 48. Load detection n 55 is also connected to the control unit. The load detector 55 is clamped and placed at a predetermined position of at least the support rod (a predetermined position between the fixed platen u and the back plate 13) to detect the load applied to the tie bar 14. In the middle, it is shown that the load detector 55 is provided; ^ i 9 i ^ is an example in which the upper and lower tie bars 14 are placed. The load detector 55 is constituted, for example, by a sensor that detects the elongation I of the tie bar i 4 . The sputum detected by the detector 55 is transmitted to the control unit 60. The control unit 6 省略 is omitted in the second diagram. The following describes the operation of the splicing device 1 该 of the structure. By the control unit 60; 1 p π π + w, the opening and closing processing unit 61 controls the mold closing step. In the state of Fig. 2 (the core is opened during the mold opening, the J cookware opening and closing processing unit 6 丨 supplies the lightning flow to the coil). 35. Then, the drive line is powered, such as the linear motor 28, and the movable platen is pushed in December. As shown in the figure of the brother 1, the movable 1 1 g 4 door can be moved... ^J movable cooker 16 and fixed The mold 15 abuts. At this time, in the background board 13 and '

Between the attachment plates 2, that is, between the electromagnet 49 and the adsorption 51, a gap a L + is formed, and the force required to close the mold is much smaller than the clamping force. Next, the control unit 6 controls the mode-locking step by the mode-locking processing unit 62 of $^^. The 杈 processing unit 62 applies the current to the coil 48, and uses the electromagnet 49 to attach the adsorption adsorption unit 51 to the movable table, and transmits the #μ force to the movable table via the adsorption plate 22 and the rod 39. Plate 12, and ^ 仟 (10) replaces the lock with U, and performs mode locking. Under this configuration, the form, when the mold clamping is started, 笙# μ is applied, and when the clamping force is changed, the mold clamping processing unit 62 is used to generate the 丨Μ 儿 丨Μ control. Change should be the target of the clamping force, that is,

7041^9688-PF 15 Steady-state current required for steady-state target clamping force (hereinafter referred to as "steady-state clamping force") (hereinafter referred to as "rated current") The value is supplied to the coil 48. In addition, the negative clamping detector 55 is used to detect the clamping force. The detected clamping force is transmitted. The control unit 60 is in the control unit 6. The current supplied to the coil 48 is adjusted and feedback control is performed so that the clamping force becomes a set value. During this period, the resin melted by the injection device 17 is shot from the injection nozzle 18 and filled in the cavity spaces of the mold device 19. When the resin in the door is cooled to become solid, the mold opening and closing process portion 61 controls the mold opening step. + ^ ' In the state of Fig. 1, the lock pot processing unit 6 2 stops the supply of the electric arc of the coil 48 from the seven electric L. As the linear motor 28 is driven, the movable platen 12 is retracted, and as shown in Fig. 2, the movable mold 16 is placed at the retreat limit position to perform mold opening. More detailed description of the closed mode step < s μ ^ ^ fruit / step and mode locking step. Fig. 3 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping step. The figure shown in Figure 3 represents 4 births + & Α α . The horizontal axis of the graph indicates the time (different/over time) for each polyline or curve. The vertical axis of the graph is given by 扭 & ® w q μ (limit value) in response to the torque of the linear motor 28 output from the mold opening and closing processing unit 61 of the control unit 60. Regarding the fold line a, the vertical axis indicates no torque value. Qufu h Yuan - m line b table does not use linear motor 28 board miscellaneous. Regarding the curve b, the vertical axis represents the position. The command value of the clamping force output by the mold clamping processing unit 62 of the broken line ==. The line table is not the actual value of the clamping force detected by the load detector 55. turn off

704U9688-PF 16 In the fold: C and curve d, vertical auxiliary indicates the size of the clamping force. In the graph of Fig. 3, the time pg, that is, the mode-locking no is at the time: is equivalent to the closed mold step. The time t2 becomes the i-th image, and it stands in the state shown in the figure of the brother 2, and in the state shown in the image of the brother I, in the figure 3, the closed mode step is in the time FW... The interval between the low and the low. When the time t 1 'root is opened and closed according to the mold, the control of the E-door (4) is carried out, and the current supply line is started between the start and the start. In the running section, if the cookware opening and closing processing unit 61 is linear, From the limit to the maximum command "Gentry, u force output to the front jlm as the curve "Jin Shi" movable platen 12 side (very direction of contact position) moves at high speed. With the background board 1 3 The gap between the gap Λ#1 and the suction plate 2 2 also reduces only the front of the linear motor 28. The straw moves the movable platen 12 at a high speed in the running section, and can be used to reduce the forming cycle and increase productivity. 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 start position of the low pressure section), the linear, "up to 28 input inner valleys are used to lower the torque output limit". The command to the preset torque value (low pressure torque). Further, a position detection of an encoder or the like (not shown) is provided in the linear stirrup 28'. From the position detector, information indicating the position of the linear motor 28 (i.e., the position of the movable platen 12) is input to the control unit. Prevent mold damage by reducing the torque output limit and pinching foreign objects between the molds. In conjunction with the 'shown by curve b', the movable platen 12 is decelerated (the forward speed is slow). The movable platen 12 (linear motor 28) is positionally controlled in a state where it is sufficiently decelerated to such an extent that the mold device 19 or the like is not damaged, and is stopped by the position control when the mold clamping start position is reached at time t2. 7041-9688-PF 17 1^9731 After time t2, it is equivalent to the mode-locking step. Here, the case where the electromagnet 49 is used to enter the shackle ’ is caused by the electromagnetic force being displaced by the gap, and the clamping force is generated, and the gap 5 becomes large when the electromagnetic force is generated. Therefore, the deterioration responsiveness from the flow of the current to the electromagnet 49 to the occurrence of a predetermined clamping force between the dies is time consuming. Further, in the case of ultra-high-precision molding, there is a method of forming an opening in which a resin is ejected before the mold is completely abutted. In the mold clamping device 4 using the electromagnet 49. The gap 5' when the electromagnetic force is generated is larger when forming the σ. However, it takes time to generate the locking force. In this case, strictly speaking, in the case where the mold is not abutted (contacted), a magnetic force is generated, and the mold clamping step is started. In consideration of this, in the present embodiment, the "mold contact position" means the position of the movable platen 12 at which the locking step should be started regardless of the contact of the mold. As indicated by the fold line c, at the mold contact position (time seven), the mold clamping portion 62 outputs an instruction for generating a steady state clamping force. This is to supply the rated current to the coil 48 of the electromagnet 49 in response to the command, and the electromagnetic force between the 13 and the suction plate 22 is generated. Thus, as the curve: (the electromagnetic force generated by the electromagnet 49 increases, and the clamping force is also increased. As the clamping force increases, the movable platen 12 advances again, and the movable mold 16 contacts the fixed mold 15, but completely The mold is closed. At this time, the opening is formed to compress the filled resin as the distance between the molds changes. As shown by the curve d, the clamping force continues to increase after the rated clamping force. After that, in the clamping step (4), the clamping force of the shirt is held. 7: The clamping force of the time t2 to the time t5 reaches the step of boosting the rated clamping force in the clamping step.

7041-9688-PF 18 After::: Aspect: The position of the mold opening and closing processing unit 61 at the position of the contact position of the mold: the dicing is used to maintain the position of the movable platen 12 in the mold contact, and the linearity is controlled. The coil 35 of the motor 28 is continuously supplied with electricity as shown by the broken line 3, and the torque output after reaching the contact position of the mold = the lowering of the force due to the force of the motor 28 < positional deviation ^ maintaining the torque). Further, in the opening forming, even if the resin is filled, the output of the wire '28' becomes an output that can resist the pressure of the filled resin to prevent the linear motor 28 from retreating. The clamping force generated by the electromagnet is increased to reach When the degree of the locking force of the linear horse is ignored (that is, when the clamping force is larger than the locking force) (in the drawing) t3) the mold opening and closing processing portion 61 variably controls the supply of the current to the coil 35 of the linear motor μ. In other words, the supply of the current is stopped. The influence of the positional control of the motor 28 on the clamping force disappears. The timing of supplying the current to the coil 35 may not be based on the clamping force, and the time (10) is over 1 'It can also be calculated as the time from when the clamping force is started to the time when the locking force becomes greater than the locking force, or based on the empirical value, 'the current is supplied during the period, and after the period has elapsed, the supply is stopped.' In this case, between the generation of the electromagnetic force and the generation of a larger clamping force than the output of the linear motor 28, by continuously supplying the motor to the linear motor 28, the injection operation is performed even before the end of the closing. In the case of forming, it is also possible to prevent resin leakage from between the movable mold 16 and the fixed mold 15. Further, in the running section, the low pressure section, and the mode locking step, the torque output limit of the linear motor 28 can also be divided into multiple stages. cut back.

7041-9688-PF 19 is called 9731. As described above, according to the mold clamping device 1 of the present embodiment, after the start of the mold clamping step (the process of increasing the clamping force), the current is also supplied to the linear motor 28 to set the position. Control to the mold contact position. Therefore, the deviation of the mold contact position caused by the locking of the linear horse 28 can be prevented, and the clamping force can be generated from the predetermined position (the mold contact position). Therefore, the incidence of poor formation can be reduced. In the present embodiment, the electromagnet 49 is formed on the rear end surface ' of the back surface 13 and is disposed on the front end surface of the suction (four) 22 so as to be movable forward and backward so as to face the electromagnet 49. The end surface of the back plate U (four) 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, in the method of controlling the mold clamping device of the present embodiment, the mold clamping operation of the mold opening and closing operation may be performed without the driving of the linear motor 28. Especially in the case of the linear motor 28, the magnet may adhere to the door surface 2 due to dust or the like on the frame surface. Therefore, Fig. 4 shows the mold opening and closing drive. F ' does not use the linear motor 28, but applies a modified example of the present invention to a rotary motor that blocks the region where the magnetic ρ is generated by the motor frame. The description of the electromagnet unit as the second driving unit is the same as in the second and second drawings, and thus the description thereof will be omitted. As the horse first drive unit, the mold opening/closing 74 of the drive unit (mold opening/closing drive unit) that is closed is attached to the motor mold opening/closing motor 74 that is fixed to the frame, and the motor frame is used to apply the magnetic field. / In this's rotary motor. The motor shaft (not shown) is blocked from the 辕 a domain. The reverse glaze protrudes from the rotary motor, and the main shaft and the ball screw 72 are connected. By ball screw shaft 72 and ball screw 20

7〇4K9688-PF 1359731 The nut 71 is screwed, and the movement direction changing movement mechanism of the linear motion of the rotary motor is rotatably disposed on the plate 2, and the ball screw nut 71 has no edge m. The movable platen protruding from the lower part is convex; Therefore, the mold _ (4) of the movable mold 16 can be performed by the mold opening/closing motor 74 rotating plate 12 in the front and rear. Further, the position detector 75 is attached to the rear end of the mold opening/closing motor 74, and enters the rotation angle of the mold opening/closing motor 74, and the position of 12. By this, the J W σ plate reaches 74. The opening and closing processing unit 61 controls the opening and closing of the mold to perform the mold clamping force on the mold unit 19 by the electromagnet, and more specifically, starts to rise (four), and there is no need to worry about the occurrence of the positional deviation of the mold. The portion 61 variably controls the supply of current to the mold opening/closing motor 74. Specifically, the supply current is stopped. Therefore, the influence of the position control of the die/opening/closing motor 74 on the clamping force is lost. The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the gist of the invention described in the scope of the invention. . This International Patent Application claims the entire content of the International Patent Application No. 2007-134623 in accordance with the priority of the Patent Application No. 2007-134623 filed on May 21, 2007. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a mold device and a mold clamping device according to an embodiment of the present invention.

7041-9688-PF 21 1359731 Diagram of the state when the mold is closed. Fig. 2 is a view showing a state in which the mold apparatus and the mold clamping device according to the embodiment of the present invention are opened. Fig. 3 is a view for explaining the operation of the mold clamping device in the mold closing step and the mold clamping step. Fig. 4 is a view showing a modified example of a rotary type horse which is applied to block a region where a magnetic field is generated by a motor frame.

[Main component symbol description] 10 Clamping device, 11 fixed platen, 12 movable platen, 13 back plate, 14 tie rod, 15 fixed mold, 16 movable mold, 17 injection device, 18 injection nozzle, 19 mold device, 21 Guide post, 22 adsorption plate, 23 guide holes, 24 large diameter parts, 25 small diameter parts, 7041-9688-PF 22 1359731 28 linear motor, 29 fixing parts, 31 movable parts, 33 magnetic · pole teeth, · 34 core, 35 coils, 37 electromagnet units, 39 poles,

41 holes, 42 lifting assemblies, 43 screws, 44 nuts, 45 slots, 46 cores, 47 units, 48 coils,

49 electromagnet, 51 adsorption unit, 55 load detector, 60 control unit, 61 mold opening and closing processing unit, 62 mold clamping processing unit, 5 gap, nl nut, 23

7041-9688-PF 1359731

Brl bearing components, Gd guides,

Fr rack.

7041-9688-PF 24

Claims (1)

1359731 Revision No. 097118640, June 27, 100. Patent application scope: 1. A type of clamping device 'having an electromagnet that drives a mold clamping action and a mold opening and closing drive portion, characterized in that: When the clamping force becomes a predetermined value or a predetermined period of time after the clamping force is generated by the electromagnet, a current is supplied to the mold opening and closing drive unit. 2. The mold clamping device of claim i, wherein the mold opening and closing drive portion is a linear motor; and the linear motor is supplied with a current required for position control in a step of boosting the electromagnet. 3. If you apply for a patent, delete it! The mold clamping device, wherein the mold opening and closing drive unit is a rotary type motor; and the rotary type motor is supplied with a current required for position control in a step of boosting the electromagnet. 4. The mold clamping device of claim 1, wherein the mold opening and closing driving portion is a linear motor; The predetermined value is greater than the locking force of the linear motor. 5. As claimed in claim 1 of the scope of the sling (the stencil device 'where the mold opening and closing drive unit is a linear motor; the motor supply current stops after the clamping force becomes a predetermined value. The linear locking device has a drive lock. The control method of the mold clamping device, the electromagnet and the mold opening and closing driving portion of the mold action are characterized by: 7041-9688-PF] 25 ^^/31 No. 097丨丨8040. The revised replacement page of June 27, 100 To the wrong electrode of the electromagnet, the lock clamping force becomes a predetermined value, and the period of the original mold clamping force is established, and the die is driven by the die and the gate M electric iron. Fan Yuan cut 1 for ... electric catch. The target of the lock device of the sixth item of the target is the mold opening and closing drive unit is a linear motor; · 〃 the current required by the step-up of the electromagnet. Motor supply position control 8. The mold opening and closing drive unit is a rotary type motor in the control of the mold clamping device of claim 6; 〃 the current required for the control in the step of boosting the electromagnet. CISS (7) position 9. If you apply for a patent The control method of the mold clamping device according to Item 6, wherein the mold opening and closing drive portion is a linear motor; 〃 the predetermined value is greater than a locking force of the linear motor. * 1〇 · as claimed in claim 6 The control method of the mold clamping device, wherein the mold opening and closing driving portion is a linear motor; ζ, stopping the supply and flow of the linear motor after the clamping force becomes a predetermined value. 〇, 7041-9688-PF1 26