WO2005075174A1 - 射出成形機 - Google Patents
射出成形機 Download PDFInfo
- Publication number
- WO2005075174A1 WO2005075174A1 PCT/JP2005/001960 JP2005001960W WO2005075174A1 WO 2005075174 A1 WO2005075174 A1 WO 2005075174A1 JP 2005001960 W JP2005001960 W JP 2005001960W WO 2005075174 A1 WO2005075174 A1 WO 2005075174A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- cavity
- injection molding
- molding machine
- movable
- Prior art date
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 138
- 239000011347 resin Substances 0.000 claims abstract description 149
- 229920005989 resin Polymers 0.000 claims abstract description 149
- 238000000465 moulding Methods 0.000 claims abstract description 129
- 238000002347 injection Methods 0.000 claims description 136
- 239000007924 injection Substances 0.000 claims description 136
- 238000001816 cooling Methods 0.000 claims description 81
- 238000000034 method Methods 0.000 description 72
- 238000005429 filling process Methods 0.000 description 28
- 238000010586 diagram Methods 0.000 description 22
- 238000010438 heat treatment Methods 0.000 description 20
- 238000005303 weighing Methods 0.000 description 14
- 230000005856 abnormality Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 208000036829 Device dislocation Diseases 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
- B29C45/322—Runner systems for distributing the moulding material to the stacked mould cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C2045/2683—Plurality of independent mould cavities in a single mould
- B29C2045/2687—Plurality of independent mould cavities in a single mould controlling the filling thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C2045/2683—Plurality of independent mould cavities in a single mould
- B29C2045/2691—Plurality of independent mould cavities in a single mould sequentially filled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76545—Flow rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76732—Mould
- B29C2945/76752—Mould runners, nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76765—Moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76822—Phase or stage of control
- B29C2945/76859—Injection
Definitions
- the present invention relates to an injection molding machine.
- a plurality of cavities are formed in a mold apparatus, and the injected resin is distributed to the plurality of cavities through a sprue and a runner for filling. Therefore, a plurality of molded articles can be molded simultaneously in one cycle of the molding step, and the productivity of the injection molding machine can be improved.
- Patent Document 1 JP-A-7-171888
- Patent Document 2 JP-A-8-118403
- the present invention solves the problems of the conventional injection molding machine and provides a mold device or a mold supporting device. By controlling the valve gate installed in the equipment by the control device, resin can be filled according to the molding conditions for each cavity, and individual molded products can be molded under optimal molding conditions. It is an object of the present invention to provide an injection molding machine capable of molding a molded product having no variation in molding accuracy and quality and capable of reducing the cost of a mold apparatus. Means for solving the problem
- a plurality of cavities formed in the mold apparatus, a resin flow path for filling the cavities with the resin, and the cavities correspond to the respective cavities.
- the control device includes a selection unit that is disposed in the resin flow path and selectively opens and closes the resin flow path, and a control device that controls the selection means.
- control device opens and closes the selection means so as to correspond to each molding condition of the cavities.
- control device further controls the timing of opening and closing each of the selection means, thereby obtaining a large shot volume cavity and a small shot volume cavity. At this time, the filling of the resin or the pressure holding or cooling of the filled resin are simultaneously completed.
- Still another injection molding machine of the present invention further includes an injection device for supplying resin, wherein the injection device fills all of the cavities with resin in one measuring step. And weigh.
- Still another injection molding machine of the present invention further includes an injection device for supplying resin, and the injection device performs a plurality of measurement steps of the resin to be filled in all of the cavities. And weigh.
- the mold apparatus further includes a fixed mold, a movable mold, and an intermediate mold, and the cavity is provided between the intermediate mold and the fixed mold.
- the control device is configured to close, mold and open the intermediate mold and the fixed mold, and to close and mold the intermediate mold and the movable mold. Tighten and open mold independently.
- the mold opening of the intermediate mold and the fixed mold and the mold opening of the intermediate mold and the movable mold are alternately performed.
- a fixed mold supporting device a first movable mold supporting device that moves with respect to the fixed mold supporting device, and the fixed mold supporting device.
- a second movable mold supporting device is provided between the device and the first movable mold supporting device, and one of each of two pairs of molds forming opposite cavities is attached to the device.
- a first mold device comprising a pair of mold forces respectively attached to the fixed mold support device and the second movable mold support device.
- a second mold device comprising a pair of molds respectively attached to the first movable mold support device and the second movable mold support device.
- a second movable mold supporting device for moving the second movable mold supporting device independently of the first movable mold supporting device.
- Drive device for moving the second movable mold supporting device independently of the first movable mold supporting device.
- the drive device for the second movable mold supporting device is further attached to the second movable mold supporting device.
- the drive device for the second movable mold supporting device is further attached to a fixed mold supporting device or a first movable mold supporting device.
- the selection means is further provided in the mold apparatus.
- the selection means is disposed at least at a fixed mold or at an intermediate mold! /.
- the second movable mold support device may further include a tie bar installed between the fixed mold support device and the first movable mold support device. Move along.
- the second movable die supporting device moves along guide means attached to the frame.
- the second movable mold support device further includes a selection means for selecting a resin flow path corresponding to each of the cavities.
- the selecting means may further include a plurality of shirts. Toe-off means.
- the shutoff means is controlled at an arbitrary timing.
- a molded product is further molded so as to correspond to each molding condition of the cavity.
- the injection molding machine further includes an ejector device provided in the fixed mold supporting device and the first movable mold supporting device.
- a first molded article is molded with a first cavity formed between a fixed mold and an intermediate mold, and the first molded article is formed between the intermediate mold and the movable mold.
- the second cavity is passed through a resin flow path in the intermediate mold to one cavity.
- the resin is filled at the timing of 1 and the resin flow path is controlled by selecting means provided in the intermediate mold to communicate with the other cavity space, and the intermediate metal is placed in the other cavity.
- the resin is filled at the second timing through the resin flow path in the mold.
- a first molded product is provided by a first mold device disposed between a first movable mold support device and a second movable mold support device.
- the first mold The first cavity formed in the mold apparatus was filled with resin at a first timing through a resin flow path in the second movable mold supporting apparatus, and was molded into the second mold apparatus.
- the resin is filled into the second cavity at a second timing through a resin flow path in the second movable mold supporting device.
- the valve gate provided in the mold apparatus or the mold supporting apparatus is controlled by the control device. For this reason, resin can be filled according to the molding conditions for each cavity, and individual molded products can be molded under optimal molding conditions, and molded products with no variation in molding accuracy and quality can be formed. And the cost of the mold apparatus can be reduced.
- FIG. 1 is a schematic view of an injection molding machine according to a first embodiment of the present invention.
- FIG. 2 is a diagram showing a first operation sequence of the injection molding machine according to the first embodiment of the present invention.
- FIG. 3 is a view showing a second operation sequence of the injection molding machine according to the first embodiment of the present invention.
- FIG. 4 is a view showing a third operation sequence of the injection molding machine according to the first embodiment of the present invention.
- FIG. 5 is a diagram showing a fourth operation sequence of the injection molding machine according to the first embodiment of the present invention.
- FIG. 6 is a schematic view of an injection molding machine according to a second embodiment of the present invention.
- FIG. 7 is a view showing a modification of the stack mold apparatus of the injection molding machine according to the second embodiment of the present invention.
- FIG. 8 is a diagram showing a first operation sequence of the injection molding machine according to the second embodiment of the present invention.
- FIG. 9 is a diagram showing a second operation sequence of the injection molding machine according to the second embodiment of the present invention.
- FIG. 10 is a schematic diagram of an injection molding machine according to a third embodiment of the present invention.
- FIG. 11 is a view showing a first operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 12 is a view showing a second operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 13 is a view showing a third operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 14 is a diagram showing a fourth operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 15 is a view showing a fifth operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 16 shows a sixth operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 17 is a schematic view of an injection molding machine according to a fourth embodiment of the present invention.
- FIG. 18 is a schematic view of an injection molding machine according to a fifth embodiment of the present invention. Explanation of symbols
- FIG. 1 is a schematic diagram of an injection molding machine according to a first embodiment of the present invention.
- 11 is an injection device
- 12 is a mold clamping device arranged to face the injection device
- 13 is a molding machine frame that supports the injection device 11 and the mold clamping device 12
- 14 is An injection device frame supported by the molding machine frame 13 and supporting the injection device 11
- 81 is a guide disposed in the longitudinal direction of the injection device frame 14
- 43 is a fixed mold 44 and a movable die A mold device consisting of a mold 45.
- the mold device 43 has a first cavity 47a and a second cavity 47b as a plurality of cavities.
- the ball screw shaft 21 is rotatably supported by the injection device frame 14, and one end of the ball screw shaft 21 is connected to the motor 22.
- the ball screw shaft 21 and the ball screw nut 23 are screwed together, and the ball screw nut 23 and the injection device 11 are connected via a spring 24 and a bracket 25. Therefore, when the motor 22 is driven in the forward and reverse directions, the rotational motion of the motor 22 is converted into a linear motion by the combination of the ball screw shaft 21 and the ball screw nut 23, that is, the screw device 91. Is transmitted to the bracket 25. Then, the bracket 25 is moved in the direction shown by the arrow A along the guide 81, and the injection device 11 is moved forward and backward.
- a heating cylinder 15 is fixed to the bracket 25 toward the front (to the left in the figure), and an injection nozzle 16 is disposed at a front end (the left end in the figure) of the heating cylinder 15.
- a hopper 17 is disposed on the heating cylinder 15, and a screw 26 is disposed inside the heating cylinder 15 so as to be able to move forward and backward (moving rightward or leftward in the drawing) and rotate freely.
- the rear end (right end in the figure) of the screw 26 is supported by a support member 82.
- a first servomotor 83 is attached to the support member 82, and rotation generated by driving the first servomotor 83 is transmitted to the screw 26 via a timing belt 84.
- a ball screw shaft 85 is rotatably supported on the injection device frame 14 in parallel with the screw 26, and the ball screw shaft 85 and the second servomotor 86 are connected via a timing belt 87. Connected.
- the front end of the ball screw shaft 85 is screwed with a ball screw nut 74 fixed to the support member 82. Therefore, when the second servomotor 86 is driven, the rotational motion of the second servomotor 86 is converted into a linear motion by the combination of the ball screw shaft 85 and the ball screw nut 74, that is, by the screw device 92.
- the linear motion is transmitted to the support member 82, and the support member 82 is moved along the guide 81 in the direction shown by the arrow B to move the screw 26 forward and backward.
- the first servomotor 83 is driven, the screw 26 is rotated via the timing belt 84, and the screw 26 is retracted to a predetermined position (moves rightward in the figure). .
- the resin supplied from the hopper 17 is heated and melted in the heating cylinder 15, and is stored (accumulated) in front of the screw 26 as the screw 26 retreats.
- the injection nozzle 16 is pressed against the fixed mold 44, the second servo motor 86 is driven, and the ball screw shaft 85 is rotated via the timing belt 87.
- the support member 82 is moved with the rotation of the ball screw shaft 85 to move the screw 26 forward (moving to the left in the drawing), so that the resin accumulated in front of the screw 26
- the sprue 48 is injected from the injection nozzle 16 and formed in the fixed mold 44 as a resin flow path, and the first runner 48a and the second runner 48a as the resin flow path branched from the sprue 48.
- the first cavity 47a and the second cavity 47b formed between the fixed mold 44 and the movable mold 45 are filled through the runner 48b.
- a first valve gate 49a and a second valve gate 49b as valves for selectively opening and closing the first runner 48a and the second runner 48b are respectively provided. , Are arranged.
- the first cavity 47a and the second cavity 47b have different shapes and resin filling amounts, that is, different shot volumes.
- Yum is larger than the shot volume of the second cavity 47b.
- the force to be described only in the case where the cavities are the first and second cavities 47a and 47b is three if the number is plural. There may be more than one or any number. In that case, the runners are branched into a number corresponding to the number of cavities, and a valve gate for opening and closing each runner is provided in the middle of each runner.
- the mold clamping device 12 includes a fixed platen 51 as a fixed mold supporting device, a toggle support 52, a tie bar 53 provided between the fixed platen 51 and the toggle support 52, and faces the fixed platen 51. And a movable platen 54 that is freely movable along the tie bar 53 (moves rightward or leftward in the figure), and is disposed between the movable platen 54 and the toggle support 52. Provided with a toggle mechanism 56. The fixed mold 44 and the movable mold 45 are attached to the fixed platen 51 and the movable platen 54 so as to face each other.
- the toggle mechanism 56 moves the movable platen 54 forward and backward along the tie bar 53 by moving the crosshead 58 between the toggle support 52 and the movable platen 54 by the toggle servomotor 66.
- the mold 45 is brought into and out of contact with the fixed mold 44 to perform mold closing, mold clamping and mold opening! / Puru.
- the toggle mechanism 56 includes a toggle lever 61 swingably supported by the crosshead 58, a toggle lever 62 swingably supported by the toggle support 52, A toggle arm 63 is swingably supported on the movable platen 54.
- the force between the toggle lever 61 and the toggle lever 62 and the force between the toggle lever 62 and the toggle arm 63 are linked to each other.
- a ball screw shaft 64 is rotatably supported by the toggle support 52, and the ball screw shaft 64 and a ball screw nut 65 fixed to the crosshead 58 are screwed together.
- the toggle servomotor 66 is attached to the side surface of the toggle support 52.
- the toggle servo motor 66 when the toggle servo motor 66 is driven, the toggle servo motor 66 Is transmitted to the ball screw shaft 64 via the timing belt 67, and is converted into linear motion by the combination of the ball screw shaft 64 and the ball screw nut 65, that is, the screw device 93. , The linear motion is transmitted to the crosshead 58, which crosshead 58
- An ejector device 71 is disposed on the back of the movable platen 54.
- the ejector device 71 extends through the movable mold 45 and has a front end (right end in the figure) at the first cavity 47a. And an ejector pin (not shown) facing the second cavity 47b, an ejector rod (not shown) arranged behind the ejector pin (left side in the figure), and a servomotor (not shown) arranged behind the ejector rod. It has a ball screw shaft 72 to be rotated, and a ball screw nut 73 screwed to the ball screw shaft 72.
- the injection molding machine has a control device 18 that controls the operations of the first valve gate 49a, the second valve gate 49b, the servomotor 66 for toggle, the first servomotor 83, and the second servomotor 86. .
- the control device 18 controls the opening and closing operation of a valve having a shutoff function as a selecting means disposed in the mold device 43 together with the mold clamping device 12 and the injection device 11.
- the opening and closing operation of the valve is controlled so as to open and close in accordance with each operation of the injection molding machine.
- the control device 18 includes an input unit for inputting the setting of the operating condition of the valve, similarly to the setting of the operating condition of the movable platen 54 and the screw 26, and a display unit for monitoring the operation of the injection molding machine.
- FIG. 2 is a diagram showing a first operation sequence of the injection molding machine according to the first embodiment of the present invention.
- FIG. 2A is a chart showing changes corresponding to the time of the molding process in the first cavities 47a and the second cavities 47b, and chart A shows a change in the molding process in the first cavities 47a.
- Chart B shows the change in the molding process at the second cavity 47b.
- the charts A and B are composed of a plurality of arrows, each arrow corresponding to each molding step in the first cavity 47a and the second cavity 47b, and the length of each arrow is determined in each molding step. Represents the time.
- the name given to each arrow indicates the molding process corresponding to each arrow, and the direction of the arrow indicates the direction in which time progresses.
- the charts A and B in the directions of the arrows, it is possible to grasp the change in the molding process in the first and second cavities 47a and 47b over time. it can. Further, the marks of ⁇ open '' and ⁇ closed '' given to the charts A and B are provided on the first runner 48a and the second runner 48b connected to the first cavity 47a and the second cavity 47b. The time points when the first valve gate 49a and the second valve gate 49b open and close are shown. As described above, the volume of the first cavity 47a is larger than the volume of the second cavity 47b, and the shot volume of the first cavity 47a is larger than the shot volume of the second cavity 47b.
- FIG. 2 (b) shows a time-dependent change in the position of the screw 26 of the injection device 11, wherein the horizontal axis represents time, and the vertical axis represents the position of the screw 26. .
- the numerical value of the vertical axis decreases as the screw 26 advances, that is, approaches the injection nozzle 16.
- the scale on the horizontal axis Are common.
- the first valve gate 49a arranged on the first runner 48a opens at the time origin, so that the resin flowing into the sprue 48
- the first cavity 47a is filled through the first runner 48a. That is, the filling step is started in the first cavity 47a.
- the filling step is completed, and the pressure holding step is performed.
- the pressure holding step since the first valve gate 49a is open, the pressure applied by the screw 26 is also applied to the resin filled in the first cavity 47a.
- the first valve gate 49a is closed, and a cooling step is performed. In the cooling step, the resin filled in the first cavity 47a loses heat by the mold device 43 and is cooled.
- the second valve gate 49b since the second valve gate 49b is open, the pressure applied by the screw 26 is also applied to the resin filled in the second cavity 47b. Subsequently, when the pressure holding step is completed, the second valve gate 49b is closed, and a cooling step is performed. In the cooling step, the second key The resin filled in the bitty 47b is deprived of heat by the mold device 43 and cooled. When the second valve gate 49b is closed, the screw 26 rotates in the injection device 11 to start the resin measuring step, so that the screw 26 retreats as shown in FIG. 2 (b).
- the cooling step ends and the mold opening step starts.
- the cooling process ends simultaneously in the first cavity 47a and the second cavity 47b.
- the movable mold 45 is retracted by the mold clamping device 12, and the parting surface of the movable mold 45 is separated from the parting surface force of the fixed mold 44.
- the molded product formed by cooling the resin adheres to the surface of the first mold 47a and the second mold 47b on the movable mold 45 side.
- the ejector device 71 operates to perform a projecting step.
- the front end of an ejector pin protrudes into the first cavity 47a and the second cavity 47b on the movable mold 45 side to eject the adhered molded product.
- the ejected molded product falls and is stored in the storage container, or the molded product that enters between the parting surface of the movable mold 45 and the parting surface of the fixed mold 44 is taken out. Collected by removal by the device. Then, the mold closing step is started again, and the above-described operation is repeatedly performed.
- the timing at which the first valve gate 49a and the second valve gate 49b are opened and closed is controlled, and during the cooling step in the first cavity 47a, the second cavity 47b is opened.
- the filling step and the pressure-holding step are performed, and the cooling step is simultaneously completed in the first cavity 47a and the second cavity 47b. Therefore, the time for cooling the resin filled in the first cavity 47a in which the volume of the first cavity 47a is larger than the volume of the second cavity 47b cools the resin filled in the second cavity 47b.
- the mold opening process can be started at the same time in the first cavities 47a and the second cavities 47b even if the time is longer than the required time.
- molding suitable for the first cavity 47a having a long cooling time as a molding condition can be performed.
- the cooling time is short, and molding suitable for the second cavity 47b can be performed.
- the filling step and the pressure-holding step in the first cavity 47a are completed, the filling step and the pressure-holding step in the second cavity 47b are performed. Therefore, it is not necessary to increase the screw diameter or increase the injection pressure. That is, it is possible to simultaneously mold a plurality of molded articles without increasing the size and performance of the injection device 11. Further, since a plurality of types of molded products can be simultaneously molded by a single mold device 43, it is possible to form a large variety of molded products in a small space.
- FIG. 3 is a diagram showing a second operation sequence of the injection molding machine according to the first embodiment of the present invention.
- the injection molding machine operates as shown in FIG.
- the first valve gate 49a provided in the first runner 48a is opened at the time origin, and the filling process is started in the first cavity 47a.
- the second valve gate 49b provided in the second runner 48b is opened, and the filling step is started in the second cavity 47b.
- the resin corresponding to the difference between the volume of the first cavity 47a and the volume of the second cavity 47b is stored in the first cavity 47a. It is at the time of filling. That is, when the remaining amount of the shot volume of the first cavity 47a becomes equal to the shot volume of the second cavity 47b, the filling process is started in the second cavity 47b. Therefore, when the filling process is started in the second cavity 47b, the injection resin amount of the injection device 11 per unit time needs to be increased, and speed control is performed so as to increase the forward speed of the screw 26. As shown in FIG. 2B, the forward speed of the screw 26 is also increased. [0068] Then, as shown in charts A and B of Fig.
- the filling step is almost simultaneously completed in the first cavity 47a and the second cavity 47b, and the pressure holding step is performed. Further, in the first cavity 47a and the second cavity 47b, the pressure-holding step ends almost simultaneously, the first valve gate 49a and the second valve gate 49b are closed, and the cooling step is performed. Subsequent operations are the same as those in the first operation sequence, and a description thereof will be omitted.
- the timing at which the first valve gate 49a and the second valve gate 49b are opened and closed is controlled, and during the filling step in the first cavity 47a, the second cavity 47b is opened. ,
- the filling step is started, and the filling step is finished almost simultaneously in the first cavity 47a and the second cavity 47b. Therefore, even if the shot volume of the first cavity 47a is larger than the shot volume of the second cavity 47b, the filling step and the pressure-holding step can be completed almost simultaneously, and the cooling step and the mold opening step can be started. it can.
- molding suitable for the first cavity 47a having a large shot volume as a molding condition can be performed, and molding suitable for the second cavity 47b having a small shot volume as a molding condition can be performed.
- the first cavity 47a and the second cavity 47b having different molding conditions respectively have the following forces.
- Optimal molding can be performed.
- the injection device 11 that performs only the speed control so as to increase the forward speed of the screw 26 is used.
- Multiple molded products can be molded simultaneously without increasing the size of the product. Further, since a plurality of types of molded products can be molded at the same time, a large variety of molded products can be molded in a small space.
- FIG. 4 is a diagram showing a third operation sequence of the injection molding machine according to the first embodiment of the present invention.
- the injection molding machine operates as shown in FIG. This
- the screw 26 is rotated in the injection device 11 at the time origin and the resin Valve gate 49a is open.
- the screw 26 should not be retracted. Therefore, by the rotation of the screw 26, the resin is also pushed out of the injection nozzle 16 and flows into the sprue 48, passes through the first runner 48 a, and is charged into the first cavity 47 a.
- the filling step is almost simultaneously completed in the first cavity 47a and the second cavity 47b, and the pressure holding step is performed.
- the pressure holding step is completed in the second cavity 47b, the second valve gate 49b is closed, and the cooling step is performed.
- the pressure holding step is completed in the first cavity 47a, the first valve gate 49a is closed, and the cooling step is performed.
- the cooling process ends at the same time. Subsequent operations are the same as those in the first and second operation sequences, and a description thereof will be omitted.
- the timing at which the first valve gate 49a and the second valve gate 49b are opened and closed is controlled, so that the resin in the first cavity 47a is filled with the intermediate force during the weighing process.
- the filling process is completed almost simultaneously in the first cavity 47a and the second cavity 47b. Therefore, even if the shot volume of the first cavity 47a is larger than the shot volume of the second cavity 47b, the filling step can be finished almost simultaneously and the mold opening step can be started. In this case, the first cavity 47a
- the pressure holding step in the second cavity 47b can be made longer than the pressure holding step in the second cavity 47b.
- molding suitable for the first cavity 47a having a large shot volume as a molding condition can be performed, and molding suitable for the second cavity 47b having a small shot volume as a molding condition can be performed.
- the optimal force can be obtained in the first cavity 47a and the second cavity 47b having different molding conditions, respectively. Molding can be performed.
- the injection device 11 that only performs speed control to increase the forward speed of the screw 26 is used.
- Multiple molded products can be molded simultaneously without increasing the size of the product. Further, since a plurality of types of molded products can be molded at the same time, a large variety of molded products can be molded in a small space.
- FIG. 5 is a diagram showing a fourth operation sequence of the injection molding machine according to the first embodiment of the present invention.
- the injection molding machine operates as shown in FIG.
- the first valve gate 49a provided in the first runner 48a is opened at the time origin, and the filling process is started in the first cavity 47a.
- the filling step is completed, and the pressure holding step is performed.
- the screw 26 rotates to perform the resin measuring step, and the resin to be charged into the second cavity 47b is measured.
- the first cavity 47a is held at the same pressure as the back pressure.
- the second valve gate 49b disposed on the second runner 48b is opened, and the filling step is started in the second cavity 47b.
- the first valve gate 49a is closed, and the cooling process is started in the first cavity 47a.
- the screw 26 is advanced again as shown in FIG. 5 (b).
- a predetermined amount of the resin is charged into the second cavity 47b, the filling process is completed, and the pressure-holding process is performed. It is. Since the volume of the second cavity 47b is smaller than the volume of the first cavity 47a, it can be seen that the filling is completed in a short time and the time required for the filling step and the pressure holding step is short. Subsequently, when the pressure holding step is completed, the second valve gate 49b is closed, and a cooling step is performed.
- the fourth operation sequence first, only the first cavity 47a is filled with the resin, and when the filling step in the first cavity 47a is completed, the weighing step is performed in the injection device 11, and After the resin to be filled in the second cavity 47b is measured, the resin is filled only in the second cavity 47b. Therefore, even if the shot volume including the first cavity 47a and the second cavity 47b needs to be measured a plurality of times, which is larger than the capacity of the injection device 11, it is possible to perform the first cycle in the molding process in one cycle. Molding can be performed in the cavity 47a and the second cavity 47b. Therefore, the throughput of the injection molding machine can be improved.
- molding suitable for the first cavity 47a having a long cooling time as the molding condition can be performed, and molding suitable for the second cavity 47b having a short cooling time as the molding condition can be performed. Furthermore, since a plurality of types of molded products can be molded at the same time, a large variety of molded products can be molded in a small space.
- the first valve gate 49a and the second valve gate 49b provided in the first runner 48a and the second runner 48b formed in the fixed mold 44 are controlled.
- resin is filled according to the respective molding conditions of the first cavity 47a and the second cavity 47b having different shot volumes.
- the first molded article 47a and the second cavity 47b having different molding conditions can mold an optimal molded article under optimal molding conditions. Further, the manufacturing of the mold device 43 becomes easy, and the cost of the mold device 43 can be reduced.
- a single mold apparatus 43 can simultaneously mold a plurality of types of molded articles. Therefore, it is possible to form a wide variety of molded products in a small space. Further, it is possible to simultaneously mold a plurality of molded products without increasing the size and performance of the injection device 11.
- FIG. 6 is a schematic diagram of an injection molding machine according to the second embodiment of the present invention
- FIG. 7 is a diagram showing a modification of the stack mold device of the injection molding machine according to the second embodiment of the present invention.
- reference numeral 111 denotes an injection device
- 112 denotes a mold clamping device.
- the injection device 111 includes a heating cylinder 114, a screw (not shown) rotatably and advancing and retracting in the heating cylinder 114, a driving unit 115 for rotating and advancing and retreating the screw, An injection nozzle 117 is provided at the tip of the heating cylinder 114.
- the mold clamping device 112 is moved forward and backward with respect to the fixed platen 121 as a fixed mold supporting device, the support plate 122 arranged opposite to the fixed platen 121, and the fixed platen 121. It comprises a movable platen 123, a stack mold device 124, a mold clamping device 125, and a mold clamping cylinder 126.
- a tie bar 130 is provided between the fixed platen 121 and the support plate 122, and the movable platen 123 is disposed along the tie bar 130 so as to be able to advance and retreat.
- the movable platen 123 can be moved by driving the mold clamping cylinder 126 and operating the mold clamping device 125.
- a fixed mold 132 is attached to the fixed platen 121, a movable mold 133 is attached to the movable platen 123, and an intermediate mold is provided between the fixed mold 132 and the movable mold 133.
- a mold 135 is provided.
- First cavities 95a and 95b are formed as a plurality of cavities between the intermediate mold 135 and the movable mold 133, and a plurality of cavities are formed between the intermediate mold 135 and the fixed mold 132.
- Second cavities 95c and 95d are formed.
- the first cavities 95a and 95b and the second cavities 95c and 95d are different in shape and filling amount of resin, that is, shot volume.
- the volumes of the first cavities 95a and 95b are larger than the volumes of the second cavities 95c and 95d, and the shot volumes of the first cavities 95a and 95b are larger than the shot volumes of the second cavities 95c and 95d.
- the first cavities 95a and 95b have the same shape and resin filling amount, and the second cavities 95c and 95d have the same shape and resin filling amount.
- the number of cavities may be any number as long as it is plural.
- the fixed mold 132 is provided with an intermediate mold driving device 165, and the intermediate mold driving device 165 moves the intermediate mold 135 forward and backward (moves rightward or leftward in FIG. 6). .
- the output is small because it is smaller than the mold clamping cylinder 126.However, the small output can be compensated by arranging it at multiple locations on the outer periphery of the fixed mold 132. Can be.
- the movable mold 133 is moved toward and away from the intermediate mold 135, and the intermediate mold 135 is moved toward and away from the fixed mold 132,
- the mold can be closed, clamped and opened.
- a snorkel 142 is formed in the intermediate mold 135 so as to protrude toward the fixed platen 121, and a sprue 96 as a resin flow path is formed in the snorkel 142.
- first runners 96a and 96b and second runners 96c and 96d as resin flow paths branched from the sprue 96 are formed.
- first runners 96a and 96b are connected to first cavities 95a and 95b, and the second runners 96c and 96d are connected to second cavities 95c and 95d.
- first valve gates 97a and 97b as valves for opening and closing the first runners 96a and 96b are provided, respectively, and the second runners 96c and 96d are provided.
- the second valve gates 97c and 97d as valves for opening and closing the second runners 96c and 96d are provided in the middle of the process.
- a plurality of connecting rods 146 are formed on the intermediate mold 135 so as to protrude toward the injection device 111, while the injection device 111 is provided with a moving cylinder 147.
- the tip of the connecting rod 146 is connected to a piston 148 in the moving cylinder 147. Accordingly, by supplying and discharging oil to and from the moving cylinder 147 and changing the relative distance between the intermediate mold 135 and the injection device 111, the injection nozzle 117 can be touched or connected to the snorkel 142. Can be separated.
- the stack mold apparatus 124 may have a configuration as shown in FIG.
- the snorkel 142 is formed so as to protrude from the side surface of the intermediate mold 135 and pass through the side of the fixed mold 132 and the fixed platen 121 without penetrating the fixed mold 132 and the fixed platen 121.
- the first cavity and the second cavity are each one of 95e and 95f
- the first runner and the second runner are each one of 96e and 96f.
- the first and second valve gates are also 97e and 97f respectively.
- a linear motion guide 161 is provided below the injection device 111 so that the injection device 111 can be moved forward and backward along the linear motion guide 161.
- a leg 155 is formed below the injection device 111, and a holding body 162 mounted on the reusable motion guide 161 is provided on the leg 155.
- the linear motion guide 161 has a large number of balls (not shown) slightly projecting from the upper surface, and supports the holding body 162 by rolling friction.
- the intermediate mold 135 is moved forward and backward in the same direction, and the injection device 111 is moved forward and backward by the same amount in the same direction as the intermediate mold 135 via the connecting rod 146.
- the frictional resistance can be reduced to 1 / 20-1 / 40.
- the starting frictional resistance can be reduced, and the difference between the starting frictional resistance and the dynamic frictional resistance is small, so that the heavy injection device 111 and the mold clamping device 112 can be easily linked.
- the injection molding machine has a control device (not shown).
- the control device has the same configuration as the control device 18 in the first embodiment, and includes all operations of the injection molding machine including the operations of the first valve gates 97a and 97b and the second valve gates 97c and 97d. Control the operation of.
- FIG. 8 is a diagram showing a first operation sequence of the injection molding machine according to the second embodiment of the present invention. [0100] First, the first operation sequence will be described. Here, FIG. 8 is the same as FIG. 2-5 in the first embodiment. Note that chart C shows a part of the process in the injection device 111. The description of the same operation as the first to fourth operation sequences in the first embodiment is also omitted.
- the first valve gates 97a and 97b or 97e arranged at the first runners 96a and 96b or 96e open, and the filling process is started at the first cavities 95a and 95b or 95e.
- a filling step is completed and a pressure holding step is performed.
- the first valve gates 97a and 97e are closed.
- 97b or 97e is closed and a cooling step is performed.
- the screw rotates to perform a resin measuring step, and the second cavities 95c and 95d or 95f The amount of the resin to be filled into is measured.
- the second valve gates 97c and 97d or 97f disposed in the second runners 96c and 96d or 96f are opened, and the second cavity gates 95c and 95d or 95f are filled at the second cavity 95c and 95d or 95f.
- the process is started. In this case, the screw is advanced again as shown in FIG. 8 (b). Then, when a predetermined amount of the resin is filled in the second cavities 95c and 95d or 95f, the filling step is completed, and the pressure holding step is performed. Since the volume of the second cavities 95c, 95d, or 95f is smaller than the volume of the first cavities 95a, 95b, or 95e, filling can be completed in a short time, and the time required for the filling step and the dwelling step is short. I understand. Subsequently, when the pressure holding step is completed, the second valve gates 97c and 97d or 97f are closed, and a cooling step is performed in the second cavities 95c and 95d or 95f.
- the mold apparatus is the stack mold apparatus 124, the mold closing, mold clamping, and mold opening of the intermediate mold 135 and the fixed mold 132, and the intermediate mold 135 and the movable mold are performed. 133 mold closing, mold closing and mold opening can be performed independently. Therefore, when the pressure-holding step is completed in the second cavities 95c and 95d or 95f, the parting surface of the movable mold 133 is also separated from the parting surface force of the intermediate mold 135, so that the first cavities 95a and 95b or The mold opening process at 95 e is started. Immediately after the mold opening process in the first cavities 95a and 95b or 95e is started, as shown in the chart C, the injection device 111 The weighing process for the first cavities 95a and 95b or 95e is started at.
- the filling step and the pressure-holding step are performed in the second cavities 95c and 95d or 95f.
- a cooling step, a mold opening step, a projecting step and a mold closing step are performed independently of each other. Therefore, molding suitable for the first cavities 95a, 95b or 95e having a long cooling time as the molding condition can be performed, and suitable for the second cavities 95c, 95d or 95f having a short cooling time as the molding condition. Molding can be done
- the mold opening of the intermediate mold 135 and the fixed mold 132 and the mold opening of the intermediate mold 135 and the movable mold 133 can be alternately performed.
- the driving force of the intermediate mold driving device 165 is smaller than the driving force of the mold clamping cylinder 126, the second cavities 95c and 95d or 95f have a small volume force S and a small shot volume. It is enough to close, close and open the mold 132.
- FIG. 9 shows a second operation sequence of the injection molding machine according to the second embodiment of the present invention.
- the injection molding machine operates as shown in FIG.
- the capacity of the first cavities 95a and 95b or 95e and the capacity of the second cavities 95c and 95d or 95f are large.
- 97e opens and the filling process begins at first cavities 95a and 95b or 95e.
- a predetermined amount of resin is filled in the first cavities 95a and 95b or 95e
- a filling step is completed and a pressure holding step is performed.
- the first valve gates 97a and 97b are finished.
- 97e is closed and a cooling step is performed.
- the second valve gates 97c and 97d or 97f are closed, and the cooling step is started.
- the second valve gates 97c and 97d or 97f are closed, in the first cavities 95a, 95b and 95e, the projecting step of the immediately preceding cycle is being performed.
- the screw rotates to perform a resin measuring step, and the first cavity is removed. The resin to be filled into 95a and 95b or 95e is measured.
- the first valve gates 97a and 97b or 97e arranged in the first runners 96a and 96b or 96e are opened, and the first cavities 95a and 95b or 95e are opened.
- the filling step of the next cycle is started.
- the cooling process is being performed in the second cavities 95c and 95d or 95f.
- the above-described operation is repeated, and in the first cavities 95a and 95b or 95e and the second cavities 95c and 95d or 95f, the filling step, the dwelling step, the cooling step, and the mold opening are performed independently of each other.
- a process, a projecting process, and a mold closing process are performed.
- the injection device is synchronized with the advance and retreat of the intermediate mold 135. 111 is moved back and forth.
- the intermediate mold driving device 65 can output a mold clamper necessary for molding the second cavities 95c and 95d or 95f.
- the filling step, the pressure holding step, the cooling step, and the mold step are performed independently of each other.
- the opening step, the projecting step, and the mold closing step are performed, one filling step and the pressure-holding step are completed, and when the measuring step is completed in the injection device 111, the other filling step is started. Therefore, molding suitable for the first cavities 95a and 95b or 95e and the second cavities 95c and 95d or 95f having large shot volumes as molding conditions can be performed.
- first cavities 95a and 95b or 95e and the second cavities 95c and 95d are identical to [0114] Also, the first cavities 95a and 95b or 95e and the second cavities 95c and 95d
- the first cavities 95a and 95b or 95e and It can be molded with two cavities 95c and 95d or 95f. Therefore, the throughput of the injection molding machine can be improved.
- the stroke of mold opening can be shortened. Therefore, the overall length of the injection molding machine can be shortened.
- the first valve gates 97a and 97b or 97e and the second valve gates 97c and 97d or 97f are controlled to open and close, and the intermediate mold 135 and the fixed metal mold are used.
- the mold closing, the mold clamping and the mold opening of the mold 132 and the mold closing, the mold clamping and the mold opening of the intermediate mold 135 and the movable mold 133 are controlled independently. Therefore, the phase of molding conditions By using different first cavities 95a and 95b or 95e and different second cavities 95c and 95d or 95f, an optimum molded product can be molded under optimal molding conditions.
- the stroke of mold opening can be shortened.
- the overall length of the injection molding machine can be shortened. Further, it is possible to simultaneously mold a plurality of molded products without increasing the size and performance of the injection device 111.
- the horizontal injection molding machine in which the movable platen moves in the horizontal direction has been described. It can also be applied to a vertical type injection molding machine that moves in the direction (vertical direction).
- FIG. 10 is a schematic diagram of an injection molding machine according to the third embodiment of the present invention.
- reference numeral 211 denotes an injection device
- 220 denotes a mold clamping device arranged to face the injection device 211
- 212 denotes a molding machine frame as a frame supporting the injection device 211 and the mold clamping device 220. It is.
- the injection device 211 includes a heating cylinder 214, a screw (not shown) rotatably and reciprocally disposed in the heating cylinder 214, a driving unit 215 for rotating and advancing and retreating the screw, and An injection nozzle 214a is provided at the tip of the heating cylinder 214.
- the mold clamping device 220 advances and retreats with respect to a fixed platen 221 as a fixed mold supporting device, a support plate 229 disposed opposite to the fixed platen 221, and the fixed platen 221 (
- a first movable mold platen 223 as a first movable mold supporting device moved rightward or leftward in FIG. 10) and is disposed between the fixed platen 221 and the first movable platen 223.
- It has a second movable platen 222 as a second movable mold support device, a mold clamping device 225, and a mold clamping cylinder 226.
- a tie bar 230 is bridged between the fixed platen 221 and the support plate 229, and the first movable platen 223 and the second movable platen 222 are slidably movable along the tie bar 230.
- a guide device having a force such as a linear motion guide is attached to the lower end of the first movable platen 223 and the second movable platen 222, and the guide device is attached to the upper surface of the molding machine frame 212 by a linear guide. You may make it move along a rail etc. Then, by driving the mold clamping cylinder 226 to operate the mold clamping device 225, the first movable platen 223 can be moved.
- a fixed mold 231 is attached to the fixed platen 221, a movable mold 234 as a mold is attached to the first movable platen 223, and further, the second movable platen 222 is attached to the first movable platen 223.
- a fixed-side intermediate mold 232 as a mold is attached to the fixed platen 221 side of the second movable platen 222, and a movable-side intermediate mold 233 as a mold is mounted on the first movable platen 223 side of the second movable platen 222. Is attached.
- a first cavity 234a as a cavity is formed between the movable-side intermediate mold 233 and the movable mold 234, and a cavity is defined as a cavity between the fixed-side intermediate mold 232 and the fixed mold 231.
- a second cavity 231a is formed.
- the first cavity 234a and the second cavity 231a are different in shape and filling amount of resin, that is, shot volume.
- the volume of the first cavity 234a is larger than the volume of the second cavity 231a
- the shot volume of the first cavity 234a is larger than the shot volume of the second cavity 23la.
- the first cavities 234a and the second cavities 231a are respectively plural, but may be singular or plural.
- the plurality of first cavities 234a have the same shape and the same shot volume, but may have different shapes.
- the plurality of second cavities 231a may have different shapes and different shot volumes.
- an ejector device 227 is provided on the back surface of the first movable platen 223.
- the ejector device 227 extends through the movable mold 234, and has an unillustrated ejector pin that has a front end (right end in FIG. 10) facing the first cavity 234a. , And an ejector rod (not shown) disposed behind the ejector rod.
- the ejector driving device is driven, the front end of the ejector pin is moved to the first key.
- the molded product protrudes into the cavity 234a and is ejected from the first cavity 234a.
- an ejector device similar to the ejector device 227 can be provided on the fixed platen 221.
- the second movable platen 222 is provided with a plurality of intermediate member driving devices 236 as a second movable mold supporting device driving device on the outer periphery of the second movable platen 222. Then, the second movable platen 222 is moved forward and backward (moves in the left-right direction in FIG. 10) by the intermediate member driving device 236.
- the intermediate member driving device 236 is, for example, a cylinder device such as a hydraulic cylinder or a pneumatic cylinder, and one end of a piston port of the cylinder device is fixed to a fixed platen 221.
- the second movable platen 222 can be moved with respect to the fixed platen 221 by operating the intermediate member driving device 236.
- the intermediate member driving device 236 may be attached to the fixed platen 221 or the first movable platen 223. In this manner, by moving the first movable platen 223 and the second movable platen 222 forward and backward, the movable mold 234 is moved relative to the movable middle mold 233 and the fixed middle mold 232 is moved. Can be brought into and out of contact with the fixed mold 231 to close, close, and open the mold. Although there is not enough space for the intermediate member driving device 236, the output is small because it is smaller than the mold clamping cylinder 226.However, the small output can be compensated by arranging it at multiple locations on the outer periphery of the platen. Can be.
- a snorkel 222a is formed on the second movable platen 222 so as to protrude toward the fixed platen 221 side, and a sprue 240 as a resin flow path is formed in the snorkel 222a.
- a plurality of intermediate runners 241 as resin flow paths branched from the sprue 240 are formed in the second movable platen 222.
- Some of the intermediate runners 241 are formed in the first mold runner 233 a as a resin flow path formed in the movable intermediate mold 233 and in the fixed intermediate mold 232. It is connected to the runner 232a in the second mold as the formed resin flow path.
- first mold runner 233a is connected to the first mold runner 233a
- second mold runner 232a is connected to the first mold runner 233a
- the first mold runner 233a and the second mold runner 232a are formed in the same number as the first cavities 234a and the second cavities 231a, and are respectively connected to the corresponding first cavities 234a and the second cavities 231a. Been Yes.
- each intermediate runner 241 there is provided a first valve gate and a second valve gate as shutoff means for shutting off the intermediate runner 241, as selection means for selecting a resin flow path.
- a valve gate 242 is provided. Therefore, by opening and closing each valve gate 242, the flow of the resin flowing through the resin flow path connected to each of the first cavity 234a and the second cavity 231a can be selectively controlled.
- a large number of intermediate runners 241 are formed in order to give the second movable platen 222 general utility and to be able to mount various types of molds. Therefore, some of the intermediate runners 241 may be connected to neither the first mold runner 233a nor the second mold runner 232a.
- Valve gate 242 remains closed. In the example shown in FIG. 10, the four intermediate runners 241 are neither connected to the first mold runner 233a nor the second mold runner 232a, and are connected to these four intermediate runners 241.
- the four valve gates 242 provided are kept closed.
- a connecting rod 238 is formed on the second movable platen 222 so as to protrude toward the injection device 211, while the injection device 211 has two injection unit driving devices 237.
- the tip of the connecting rod 238 is connected to the injection unit driving device 237.
- the injection unit driving device 237 is, for example, a cylinder device such as a hydraulic cylinder or a pneumatic cylinder, and one end of a piston rod of the cylinder device is connected to a tip of the connection rod 238.
- a guide device 217 having a linear motion guide and the like is disposed below the injection device 211, and the injection device 211 is moved forward and backward along a guide member 213 having a guide rod, a guide rail and the like (FIG. 10). Now you can move it left and right!)
- the guide member 213 is mounted on the molding machine frame 212 via a support member 213a.
- the connecting rod 238 is The injection device 211 can be moved back and forth by the same amount in the same direction as the second movable platen 222 via the same.
- the guide device 217 since the guide device 217 is used to move the injection device 211 forward and backward, the frictional resistance can be reduced, and the heavy injection device 211 and the mold clamping device 220 can be easily linked. Become.
- the injection molding machine has a control device (not shown).
- the control device also controls the opening / closing operation of the knurl disposed in the second movable platen 222 together with the mold clamping device 220 and the injection device.
- the opening and closing operation of the valve is controlled so as to open and close in accordance with each operation of the injection molding machine.
- the control device includes an input unit for inputting the setting of the operating condition of the valve, as well as the first movable platen 223 and the setting of the operating condition of the screw, and a display for monitoring the operation of the injection molding machine. It may have a part or the like.
- a detector such as a proximity switch
- a warning display urging a warning to the operator can be displayed on the display unit.
- a warning display urging a warning to the operator can be displayed on the display unit.
- FIG. 11 is a diagram showing a first operation sequence of the injection molding machine according to the third embodiment of the present invention.
- FIG. 11 (a) is a chart showing a change corresponding to the time of the molding process in the first cavity 234a and the second cavity 231a
- chart A shows a change in the molding process in the first cavity 234a
- B shows the change in the molding process at the second cavity 23 la.
- the chart A and the chart B are composed of a plurality of arrows, each arrow corresponding to each molding step in the first cavity 234a and the second cavity 231a, and the length of each arrow corresponds to each molding step.
- the name given to each arrow indicates the molding process corresponding to each arrow, and the direction of the arrow is Show the direction of time progress.
- FIG. 11 (b) shows the time-dependent change in the position of the screw of the injection device 211, in which the horizontal axis represents time and the vertical axis represents the screw position.
- the vertical axis indicates that the numerical value decreases as the screw advances, that is, approaches the injection nozzle 214a.
- the scale on the horizontal axis indicating time is common.
- the mold apparatus is opened, that is, the parting surface of the movable mold 234 and the parting surface of the movable intermediate mold 233 are separated from each other.
- the mold closing process is started in a state where the parting surface of the fixed mold 231 and the parting surface of the fixed mold 231 are separated from each other, the mold clamping device 225 and the intermediate member driving device 236 are operated, and the first movable platen is activated. 223 and the second movable platen 222 advance.
- the fixed-side intermediate mold 232 advances and approaches the fixed mold 231
- the movable mold 234 advances and approaches the movable-side intermediate mold 233.
- the parting surface of the movable mold 234 contacts the parting surface of the movable-side intermediate mold 233, and the parting surface of the fixed-side intermediate mold 232 contacts the parting surface of the fixed mold 231.
- the mold closing process is completed.
- the driving unit 215 rotates the screw, and moves the screw backward (moves rightward in Fig. 10) to a predetermined position. At this time, the resin supplied from the hopper 216 is heated and melted in the heating cylinder 214, and is stored in front of the screw as the screw retreats.
- the drive unit 237 for the injection unit is operated to bring the injection device 211 close to the second movable platen 222, and Press chisel 214a against snorkel 222a. Then, the driving unit 215 advances the screw (moves to the left in FIG.
- the valve gate 242 since the valve gate 242 is open, the pressure applied to the resin by the screw in the heating cylinder 214 is also applied to the resin filled in the first cavity 234a. Subsequently, when the pressure holding step is completed, the valve gate 242 is closed, and a cooling step is performed. In the cooling step, the resin filled in the first cavity 234a is deprived of heat by the movable mold 234 and the movable intermediate mold 233 and cooled.
- the second cavity 231a is closed. Since the valve gate 242 provided in the intermediate runner 241 connected to the sprue 240 opens, the resin flowing into the sprue 240 passes through the intermediate runner 241 and fills the second cavity 23 la. That is, the filling step is started in the second cavity 231a. In this case, as shown in FIG. 11 (b), the screw is advanced again. Then, when a predetermined amount of the resin is filled in the second cavity 231a, the filling step is completed, and the pressure holding step is performed.
- the filling is completed in a short time, and it can be seen that the time required for the filling step is short.
- the valve gate 242 since the valve gate 242 is open, the pressure generated by the screw in the heating cylinder 214 is also applied to the resin filled in the second cavity 23 la.
- the valve gate 242 is closed, and a cooling step is performed.
- the resin filled in the second cavity 231a is deprived of heat by the fixed side intermediate mold 232 and the fixed mold 231 and cooled.
- the valve gate 242 provided in the intermediate runner 241 closes, and the screw rotates in the injection device 211 to start the resin measuring process. Screw retreats, as shown.
- the parting surface of the movable mold 234 is also separated from the parting surface force of the movable-side intermediate mold 233, and the parting surface of the fixed-side middle mold 232 is also separated from the parting surface of the fixed mold 231.
- the molded product formed by cooling the resin adheres to the surface of the first cavity 234a on the movable mold 234 side and the surface of the second cavity 231a on the fixed mold 231 side.
- the ejector device 227 is operated to perform a projecting step.
- the front end of an ejector pin protrudes into the first cavity 234a on the movable mold 234 side to eject the adhered molded product.
- an ejector device (not shown) operates to perform a projecting process, and the fixed mold 231
- the molded product adhering in the second cavity 231a on the side is ejected.
- the ejected molded article is dropped and stored in the storage container, or between the parting surface of the movable mold 234 and the parting surface of the movable-side intermediate mold 233, and in the fixed side. It is collected by being removed by a molded product removal device that enters between the parting surface of the intermediate mold 232 and the parting surface of the fixed mold 231. Then, the mold closing process is started again, and the above-described operation is repeatedly performed.
- the mold closing and mold opening of the movable mold 234 and the movable-side intermediate mold 233 and the fixed-side intermediate mold 232 and the fixed mold 231 are simultaneously performed.
- the valve gate 242 connected to the first cavity 234a and disposed on the intermediate runner 241 and the valve gate 242 disposed on the intermediate runner 241 connected to the second cavity 23 la are connected.
- the time for cooling the resin filled in the first cavity 234a is determined by removing the resin filled in the second cavity 231a. Even if it is longer than the time for cooling, the mold opening process can be started at the same time in the first cavity 234a and the second cavity 231a. That is, molding suitable for the first cavity 234a having a long cooling time as a molding condition can be performed, and molding suitable for the second cavity 231a having a short cooling time as a molding condition can be performed.
- a mold device with a simple structure a simple structure that does not require the use of complex molds such as those used in normal stack molding can be used. By performing the same normal molding operation as in the above, optimal molding can be performed in each of the first cavity 234a and the second cavity 231a having different molding conditions.
- the filling step and the pressure-holding step in the first cavity 234a are completed, so that the amount of filling resin per unit time is increased. Therefore, it is not necessary to increase the screw diameter or increase the injection pressure. In other words, a plurality of injection devices 211 cannot be increased in size or improved in performance. Can be molded at the same time. Further, since a plurality of types of molded products can be simultaneously molded by a single mold apparatus, it is possible to form a large variety of molded products in a small space.
- FIG. 12 is a diagram showing a second operation sequence of the injection molding machine according to the third embodiment of the present invention.
- valve gate 242 provided in the intermediate runner 241 connected to the first cavity 234a opens, and the filling process starts in the first cavity 234a. Is done. Then, in the middle of the filling process in the first cavity 234a, the valve gate 242 provided in the intermediate runner 241 connected to the second cavity 231a opens, and the filling process is started in the second cavity 231a.
- the filling step is started in the second cavity 231a
- the resin corresponding to the difference between the volume of the first cavity 234a and the volume of the second cavity 231a is filled in the first cavity 234a.
- the filling process is started in the second cavity 231a. Therefore, when the filling process is started in the second cavity 231a, it is necessary to increase the filling resin amount per unit time of the injection device 211, and speed control is performed so as to increase the forward speed of the screw. As shown in FIG. 12 (b), the screw advance speed is also increased.
- the filling step is completed almost simultaneously in the first cavity 234a and the second cavity 231a, and the pressure holding step is performed.
- the first and second cavities 234a and 231a are controlled so that they are almost the same time and large and small in accordance with the cavities, and the holding of the cavities is terminated.
- the pressure-holding process is completed, the knurl gate 242 provided in the intermediate runner 241 connected to the first cavity 234a and the valve gate 242 provided in the intermediate runner 241 connected to the second cavity 231a close.
- a cooling step is performed. About the subsequent operations Since the operation is the same as the first operation sequence, the description is omitted.
- the pressure-holding process may be controlled so that the valve gate is closed and the process shifts to the cooling process according to the size of the cavity that does not necessarily need to be ended at the same time.
- the mold closing and the mold opening of the movable mold 234 and the movable-side intermediate mold 233 and the fixed-side intermediate mold 232 and the fixed mold 231 are simultaneously performed.
- the valve gate 242 connected to the first cavity 234a and disposed on the intermediate runner 241 and the valve gate 242 disposed on the intermediate runner 241 connected to the second cavity 23 la are connected.
- the opening / closing timing is controlled so that the filling process in the second cavity 231a is started in the middle of the filling process in the first cavity 234a, and the filling processes in the first cavity 234a and the second cavity 231a are completed almost simultaneously. It has become.
- the injection device 211 is controlled only by increasing the speed of the screw to increase the calorie speed. Can be. Further, since a plurality of types of molded products can be simultaneously molded by a single mold apparatus, it is possible to form a large variety of molded products in a small space.
- FIG. 13 shows a third operation sequence of the injection molding machine according to the third embodiment of the present invention.
- the screw rotates and weighs with the valve gate 242 provided in the intermediate runner 241 connected to the first cavity 234a opened at the time origin in FIG. The process is performed.
- the screw should not be retracted. For this reason, the rotation of the screw causes the resin to be extruded from the injection nozzle 214a, flow into the sprue 240, pass through the intermediate runner 241 and fill the first cavity 234a.
- valve gate 242 disposed on the intermediate runner 241 connected to the second cavity 231a opens, so that the resin injected from the injection nozzle 214a passes through the intermediate runner 241 and Filled in the cavity 234a and the second cavity 231a.
- speed control for controlling the forward speed of the screw is performed.
- the mold closing and mold opening of the movable mold 234 and the movable-side intermediate mold 233 and the fixed-side intermediate mold 232 and the fixed mold 231 are simultaneously performed. So
- the valve gate 242 connected to the first runner 234a and connected to the intermediate runner 241 and the valve gate 242 connected to the second runner 241 connected to the second cavity 23 la are opened and closed.
- the injection device 211 since the filling process in the second cavity 231a is started in the middle of the filling process in the first cavity 234a, the injection device 211 only performs speed control so as to increase the forward speed of the screw. It is possible to simultaneously mold a plurality of molded products without increasing the size or improving the performance. As for the force, it is possible to use a mold device with a simple structure that does not require the use of a complex mold as used in ordinary stack molding. Moreover, a single mold device can simultaneously mold multiple types of molded products. Because it can be molded, it is possible to mold a wide variety of molded products in a small space.
- FIG. 14 is a diagram illustrating a fourth operation sequence of the injection molding machine according to the third embodiment of the present invention.
- the valve gate 242 provided in the intermediate runner 241 connected to the first cavity 234a opens, and the first cavity is opened.
- the filling process is started.
- the pressure holding step is performed.
- the screw rotates to perform the resin measuring step, and the resin to be charged into the second cavity 231a is measured.
- valve gate 242 provided in the intermediate runner 241 connected to the second cavity 231a opens, and the filling process is started in the second cavity 231a.
- the valve gate 242 provided in the intermediate runner 241 connected to the first cavity 234a is closed, and the cooling process is started in the first cavity 234a.
- the screw is advanced again. Then, when a predetermined amount of the resin is charged into the second cavity 231a, the filling step is completed, and the pressure holding step is performed.
- the volume of the second cavity 231a is smaller than the volume of the first cavity 234a, it can be seen that the filling is completed in a short time, and the time required for the filling step and the pressure holding step is short. Subsequently, when the pressure-holding step is completed, the valve gate 242 disposed on the intermediate runner 241 connected to the second cavity 231a is closed, and the cooling step is performed.
- the mold closing and mold opening of the movable mold 234 and the movable side middle mold 233 and the fixed side middle mold 232 and the fixed mold 231 are simultaneously performed. Then, first, only the first cavity 234a is filled with the resin, and when the filling step in the first cavity 234a is completed, a measuring step is performed in the injection device 211, and the resin filled in the second cavity 231a is filled. After the measurement is performed, only the second cavity 231a is filled with resin.
- FIG. 15 is a diagram showing a fifth operation sequence of the injection molding machine according to the third embodiment of the present invention.
- Chart C shows a part of the process in the injection device 211.
- the valve gate 242 provided in the intermediate runner 241 connected to the first cavity 234a opens, and the filling process is started in the first cavity 234a. You. When a predetermined amount of the resin is filled in the first cavity 234a, the filling step is completed and a pressure holding step is performed. When the pressure holding step is completed, the valve gate 242 is closed and a cooling step is performed. Is
- the screw rotates to perform the resin measuring step. Then, the resin to be charged into the second cavity 231a is measured.
- the valve gate 242 provided in the intermediate runner 241 connected to the second cavity 231a opens, and the filling step is started in the second cavity 231a.
- the screw is advanced again. Then, when a predetermined amount of the resin is charged into the second cavity 231a, the filling step is completed, and the pressure holding step is performed.
- the volume of the second cavity 231a is smaller than the volume of the first cavity 234a, it can be seen that the filling is completed in a short time, and the time required for the filling step and the pressure holding step is short. Subsequently, when the pressure holding step is completed, the valve gate 242 provided in the intermediate runner 241 connected to the second cavity 231a is closed, and the cooling step is performed in the second cavity 231a. .
- the movable mold 234 and the movable intermediate mold 233 are closed and closed.
- the mold opening, the mold closing, the mold clamping, and the mold opening of the fixed side intermediate mold 232 and the fixed mold 231 can be independently performed. Therefore, at the time when the pressure-holding step is completed in the second cavity 231a, the mold clamping device 225 is operated to separate the parting surface of the movable mold 234 from the parting surface force of the movable-side intermediate mold 233, and The mold opening process for one cavity 234a is started. Immediately after the mold opening step in the first cavity 234a is started, as shown in a chart C, a weighing step for the first cavity 234a is started in the injection device 211.
- the cooling process in second cavity 231a is completed in a short time.
- the intermediate member driving device 236 is operated to separate the parting surface of the fixed-side intermediate mold 232 from the parting surface force of the fixed mold 231 to start the mold opening process in the second cavity 231a.
- the mold opening step, the projecting step, and the mold closing step are performed independently of each other.
- the mold closing and the mold opening of the movable mold 234 and the movable side intermediate mold 233 and the mold closing and the mold opening of the fixed side intermediate mold 232 and the fixed mold 231 are different. Performed independently. Then, during the cooling step in the first cavity 234a, the filling step and the pressure-holding step are performed in the second cavity 231a. Thereafter, in the first cavity 234a and the second cavity 231a, the cooling step, the mold opening step, the ejection step, and the mold closing step are performed independently of each other. Therefore, molding suitable for the first cavity 234a having a long cooling time as the molding condition can be performed, and molding suitable for the second cavity 231a having a short cooling time as the molding condition can be performed.
- the first cavity 234a is filled with the resin, and when the filling step in the first cavity 234a is completed, a measuring step is performed in the injection device 211 to fill the second cavity 231a. After the measurement of the fat is performed, only the second cavity 231a is filled with the fat. Therefore, even if the shot volume combining the first cavity 234a and the second cavity 231a needs to perform a plurality of weighing processes that are larger than the capability of the injection device 211, the first molding process can be performed in one cycle. It can be molded in the cavity 234a and the second cavity 231a. Therefore, the throughput of the injection molding machine is improved. Can be up.
- the mold opening of the movable mold 234 and the movable side middle mold 233 and the mold opening of the fixed side middle mold 232 and the fixed mold 231 can be alternately performed.
- the driving force of the intermediate member driving device 236 is smaller than the driving force of the mold clamping cylinder 226.
- the second cavity 231a has a small volume and a small shot volume, the driving force of the fixed side intermediate mold 232 and the fixed mold 231 is small. Enough to close, close and open the mold.
- FIG. 16 is a diagram showing a sixth operation sequence of the injection molding machine according to the third embodiment of the present invention.
- the cooling step of the previous cycle is performed in the second cavity 23 la, while the valve gate 242 connected to the first cavity 234a and disposed in the intermediate runner 241 is opened, The filling step is started at the first cavity 234a. Then, when a predetermined amount of resin is filled in the first cavity 234a, the filling step is completed and a pressure-holding step is performed. When the pressure-holding step is completed, the valve gate 242 is closed and the cooling step is performed. Is performed.
- the second cavity 231a performs the projecting step of the previous cycle. ing. Immediately after the valve gate 242 disposed on the intermediate runner 241 connected to the first cavity 234a is closed, as shown in the chart C, the screw rotates in the discharge device 211 as shown in the chart C. A fat measuring step is performed, and the fat to be filled in the second cavity 231a is measured. When the weighing step is completed, the valve gate 242 connected to the second cavity 231a and disposed on the intermediate runner 241 is opened, and the filling step is started in the second cavity 231a.
- valve gate 242 When the valve gate 242 provided in the intermediate runner 241 connected to the second cavity 23 la is opened, the cooling process is performed in the first cavity 234a. Subsequently, in the second cavity 231a, when the filling step and the pressure holding step are completed, the valve gate 242 is closed, and the cooling step is started. On the other hand, when the valve gate 242 disposed on the intermediate runner 241 connected to the second cavity 231a is closed, the first cavity 234a is in the protruding step. Immediately after the valve gate 242 disposed on the intermediate runner 241 connected to the second cavity 23 la is closed, as shown in Chart C, the screw rotates in the injection device 211 as shown in Chart C.
- a fat measuring step is performed, and the fat to be charged into the first cavity 234a is measured. Then, when the measuring step is completed, the valve gate 242 provided in the intermediate runner 241 connected to the first cavity 234a opens, and the next cycle filling step is started in the first cavity 234a. When the valve gate 242 provided on the intermediate runner 241 connected to the first cavity 234a is opened, a cooling process is being performed on the second cavity 231a. Thereafter, the above-described operation is repeated, and in the first cavity 234a and the second cavity 231a, the filling step, the pressure holding step, the cooling step, the mold opening step, the projecting step, and the mold closing step are performed independently of each other. Done.
- the drive of the injection unit driving device 237 is controlled in synchronization with the advance / retreat of the second movable plate 222.
- the injection device 211 must be moved forward and backward.
- the intermediate member driving device 236 can output a mold clamper necessary for molding the second cavity 23 la.
- the movable mold 234 and the movable-side intermediate mold 233 and the fixed-side intermediate mold 232 and the fixed mold 231 are independent of each other at different timings. Done. Then, in the first cavity 234a and the second cavity 231a, a filling step, a pressure holding step, a cooling step, a mold opening step, a projecting step, and a mold closing step are performed independently of each other.
- the pressure step ends and the metering step ends in the injection device 211 the other filling step starts. Therefore, molding suitable for the first cavity 234a and the second cavity 231a having a large shot volume as molding conditions can be performed.
- the mold opening of the movable mold 234 and the movable-side intermediate mold 233 and the mold opening of the fixed-side intermediate mold 232 and the fixed mold 231 can be performed independently. Therefore, the length of the injection molding machine can be shortened.
- each of the valve gates 242 arranged in the middle of the intermediate runner 241 formed in the second movable platen 222 can be controlled to open and close.
- the mold closing, mold closing and mold opening of the movable mold 234 and the movable side middle mold 233 and the mold closing, mold clamping and mold opening of the fixed side middle mold 232 and the fixed mold 231 are performed independently. It can be controlled and performed. Then, resin is filled according to the molding conditions of the first cavity 234a and the second cavity 231a having different shot volumes. Therefore, an optimal molded product can be molded under optimal molding conditions by using the first cavity 234a and the second cavity 231a having different molding conditions.
- the mold opening of the movable mold 234 and the movable-side intermediate mold 233 and the mold opening of the fixed-side intermediate mold 232 and the fixed mold 231 can be performed at a shifted timing.
- the length of the injection molding machine can be shortened.
- the second movable platen 222 can be made versatile, and various types of dies can be attached. Further, since there is no need to dispose the valve gate 242 in the mold, the structure of the mold can be simplified, and various kinds of molds can be used.
- FIG. 17 is a schematic diagram of an injection molding machine according to the fourth embodiment of the present invention.
- the mold clamping device 220 is of a vertical type in which the first movable platen 223 and the second movable platen 222 move in the vertical direction (vertical direction).
- the injection device 211 is of a horizontal type in which the screw moves in the horizontal direction (horizontal direction) in the heating cylinder 214, as in the third embodiment.
- a fixed platen 221, a second movable platen 222, a first movable platen 223, and a support plate 229 are arranged in this order from below, and the back of the fixed platen 221
- the molding machine is fixed to the frame 212.
- an ejector device 228 for ejecting a molded product from the second cavity 231a is provided.
- the mold clamping device 225, mold clamping cylinder 226, ejector device 227, tie bar 230, fixed mold 231, fixed middle mold 232, movable middle mold 233, movable mold 234, intermediate member driving device 236, etc. Is attached to the fixed platen 221, the second movable platen 222, the first movable platen 223, and the support plate 229 in the same manner as in the third embodiment.
- the first cavity 234a, the second cavity 231a, the intermediate runner 241 and the knob gate 242 are the same as those in the third embodiment.
- the second movable platen 222 does not include the snorkel 222a, and the sprue 240 formed in the second movable platen 222 extends in the horizontal direction in FIG.
- An opening is provided on the side surface of the movable platen 222 on the injection device 211 side. Then, when the resin is injected, the injection nozzle 214a is pressed against the opening of the sprue 240 on the side surface of the second movable platen 222, that is, the nozzle is touched. Therefore, the connecting rod 238 whose tip is connected to the injection unit driving device 237 is attached to the fixed platen 221.
- the injection unit driving device 237 is interlocked with the intermediate member driving device 236, and the second movable platen 222 is drawn to the fixed platen 221 by the intermediate member driving device 236, so that the fixed side intermediate mold 232 and the fixed Only when the mold 231 is closed, the injection unit drive device 237 advances the injection device 211 to perform nozzle touch. Further, when the fixed-side intermediate mold 232 and the fixed mold 231 are replaced with ones having different thicknesses, the fixed-side middle mold 232 and the fixed mold 231 are replaced. Upper and lower sides of the second movable platen 222 with the intermediate mold 232 and the fixed mold 231 closed.
- the guide member 213 adjusts the upper and lower positions with respect to the support member 213a in order to adjust the vertical position of the injection device 211 corresponding to the second movable platen 222 since the position of the injection member 211 changes. Attached so that it can be adjusted! /
- the mold clamping device 220 is of a vertical type, the overall length of the injection molding machine can be shortened. Therefore, the installation space of the injection molding machine can be reduced, and it is possible to mold a wide variety of molded products in a small space.
- FIG. 18 is a schematic diagram of an injection molding machine according to the fifth embodiment of the present invention.
- injection device 211 is of a vertical type in which a screw moves vertically in heating cylinder 214.
- the mold clamping device 220 is of a horizontal type in which the first movable platen 223 and the second movable platen 222 move in the horizontal direction.
- the guide member 213 extends in the up-down direction, and the lower end is fixed to the molding machine frame 212.
- the injection unit driving device 217 also generates a rodless cylinder or the like, and slides up and down along the guide member 213 to move the injection device 211 in the up and down direction.
- the mold clamping device 220 has substantially the same force as that of the third embodiment.
- the second movable platen 222 has the same configuration as that of the fourth embodiment, and is fixed.
- An ejector device 228 for ejecting a molded product from the second cavity 231a is provided on the back surface of the platen 221 as in the fourth embodiment.
- the injection unit driving device 237 includes an intermediate member.
- the second movable platen 222 is drawn to the fixed platen 221 by the intermediate member driving device 236, and the fixed side intermediate mold 232 and the fixed mold 231 are closed.
- the injection unit driving device 217 causes the injection device 211 to move forward and perform nozzle touch.
- the second movable platen 222 may be fixed as a fixed platen on the frame, and the fixed platen 221 may be moved to move forward and backward as the second movable platen.
- the second movable platen 222 is fixed on the frame as a fixed platen, it is possible to keep the nozzle touch in a touched state even when the mold is opened.
- the injection device 211 is of the vertical type, the overall length of the injection molding machine can be shortened. Therefore, the installation space of the injection molding machine can be reduced, and it is possible to mold a wide variety of molded products in a small space.
- the overall length of the injection molding machine can be shortened. Therefore, the installation space of the injection molding machine can be reduced, and it is possible to mold a wide variety of molded products in a small space.
- the injection device 211 may be of a horizontal type.
- the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not intended to exclude the scope of the present invention.
- the present invention can be applied to an injection molding machine.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005517812A JPWO2005075174A1 (ja) | 2004-02-10 | 2005-02-09 | 射出成形機 |
EP05710012A EP1714768A4 (en) | 2004-02-10 | 2005-02-09 | INJECTION MOLDING MACHINE |
US10/588,601 US20070184140A1 (en) | 2004-02-10 | 2005-02-09 | Injection molding machine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2004-033520 | 2004-02-10 | ||
JP2004033645 | 2004-02-10 | ||
JP2004-033645 | 2004-02-10 | ||
JP2004033520 | 2004-02-10 |
Publications (1)
Publication Number | Publication Date |
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WO2005075174A1 true WO2005075174A1 (ja) | 2005-08-18 |
Family
ID=34840176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/001960 WO2005075174A1 (ja) | 2004-02-10 | 2005-02-09 | 射出成形機 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070184140A1 (ja) |
EP (1) | EP1714768A4 (ja) |
JP (1) | JPWO2005075174A1 (ja) |
KR (1) | KR20060111690A (ja) |
TW (1) | TWI252156B (ja) |
WO (1) | WO2005075174A1 (ja) |
Cited By (4)
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JP2010241085A (ja) * | 2009-04-10 | 2010-10-28 | Ube Machinery Corporation Ltd | 射出発泡成形方法 |
JP2011056708A (ja) * | 2009-09-08 | 2011-03-24 | Ube Machinery Corporation Ltd | 射出成形装置及び射出成形方法 |
JP2011104834A (ja) * | 2009-11-16 | 2011-06-02 | Ube Machinery Corporation Ltd | 射出発泡成形装置及び射出発泡成形方法 |
JP2015044392A (ja) * | 2013-08-29 | 2015-03-12 | 株式会社日本製鋼所 | スタックモールドが取り付けられた射出成形機の運転方法 |
Families Citing this family (5)
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JP2012125925A (ja) * | 2010-12-11 | 2012-07-05 | Sankoo Giken:Kk | 射出成形方法及び射出成形装置 |
JP5611027B2 (ja) * | 2010-12-24 | 2014-10-22 | 小島プレス工業株式会社 | 樹脂製品の製造システム |
KR101517401B1 (ko) * | 2014-01-14 | 2015-05-04 | 김종관 | 사출장치 |
US20220024093A1 (en) * | 2020-07-21 | 2022-01-27 | Canon Virginia, Inc. | Injection molding system |
KR20230009601A (ko) | 2021-07-09 | 2023-01-17 | 현대자동차주식회사 | 직렬형 멀티 캐비티 고압주조장치 및 그것을 이용한 고압주조방법 |
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Also Published As
Publication number | Publication date |
---|---|
US20070184140A1 (en) | 2007-08-09 |
TWI252156B (en) | 2006-04-01 |
KR20060111690A (ko) | 2006-10-27 |
JPWO2005075174A1 (ja) | 2007-10-11 |
TW200536700A (en) | 2005-11-16 |
EP1714768A1 (en) | 2006-10-25 |
EP1714768A4 (en) | 2009-04-01 |
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