JP3602470B2 - Injection molding machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an injection molding machine.
[0002]
[Prior art]
Conventionally, an injection molding machine includes an injection device, a mold device, and a mold clamping device, and is configured to inject resin melted in a heating cylinder of the injection device from an injection nozzle by advancing a screw. . The mold device includes a fixed mold and a movable mold, and by driving the mold clamping device, the mold is closed, the mold is closed and the mold is opened, and the fixed mold is in a state where the mold is clamped. A cavity space is formed between the movable mold and the movable mold. The resin injected from the injection nozzle is filled into the cavity through a sprue, a runner, a gate, and the like formed in the mold apparatus, and is cooled and solidified in the cavity. It becomes a molded product.
[0003]
Further, the molded product is separated from the fixed mold as the mold is opened and the movable mold is retracted, and then, as the ejector pins are protruded, the molded article is removed from the movable mold. It is released.
[0004]
By the way, for example, in an injection molding machine in which a cavity is filled with a resin and then a runner and a sprue are separated from the cavity by performing gate cutting, the mold is opened. As the ejector pins protrude, the runner portion made of the resin solidified in the runner and the sprue is separately formed from the fixed mold, and the molded product made of the resin solidified in the cavity space is separately formed from the movable mold. The mold is released.
[0005]
In this case, if the runner portion and the molded product are collected by the same storage box, a process of separating the runner portion and the molded product is required, and the operation is troublesome.
[0006]
Therefore, a separation chute is disposed below the mold apparatus, a partition plate is disposed in the separation chute, the runner part and the molded product are separated by the partition plate, and the runner part is separated by the runner part recovery body. The molded product is collected by a molded product collection body. The molded article constitutes a first member, and the runner part constitutes a second member.
[0007]
[Problems to be solved by the invention]
However, in the conventional injection molding machine, when the position of the partition plate is not accurate, when the opening amount of the mold device is changed, or the like, the molded product is collected by the runner portion collection body, or the runner portion is collected. Or the runner portion cannot be accurately recovered because the product is collected by the molded product recovery body.
[0008]
An object of the present invention is to solve the problems of the conventional injection molding machine and to provide an injection molding machine that can accurately collect the first and second members.
[0009]
[Means for Solving the Problems]
For this purpose, in the injection molding machine of the present invention, the first member is disposed so as to be swingable below the mold device and has first and second discharge ports. A receiving member for selectively discharging the second member from the second discharge port through the discharge port, and a moving mechanism for swinging the receiving member.
[0010]
The second discharge port includes a passage blocking unit that blocks passage of the first member, and a passage permitting unit that allows passage of the second member.
[0011]
In another injection molding machine of the present invention, further, the receiving member discharges the second member from the second outlet at the first position, and stores the first member at the second position. The first member is discharged from the first discharge port at.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 2 is a front view of the injection molding machine according to the embodiment of the present invention.
[0014]
In the drawing, reference numeral 10 denotes an injection molding machine frame, 11 denotes an injection device, 12 denotes a mold device case disposed in front of the injection device 11 (left side in the drawing) and surrounds a not-shown mold device, and 13 denotes a mold device case. A mold-clamping device case 17 surrounding the mold-clamping device (not shown) is a control unit for controlling the injection molding machine. The control unit 17 has a predetermined operation unit. The injection molding machine frame 10 supports an injection device 11, a mold device case 12, a mold clamping device case 13, and a control unit 17.
[0015]
The injection device 11 includes a heating cylinder 15 and a driving unit 16 disposed rearward (rightward in the figure) of the heating cylinder 15. An injection nozzle (not shown) is provided at a front end (left end in the figure) of the heating cylinder 15. Is arranged. A screw (not shown) is provided in the heating cylinder 15 so as to be rotatable and advance / retreat. Therefore, when the screw is rotated by driving the driving unit 16, the metering is performed, and the resin as the molding material melted in front of the screw head at the front end of the screw (front of the heating cylinder 15) is stored. Further, when the screw is advanced by driving the drive unit 16, injection is performed, and the resin stored in front of the screw head is injected from the injection nozzle.
[0016]
In addition, the mold device includes a fixed mold, and a movable mold that is disposed so as to be able to freely move toward and away from the fixed mold. The mold clamping device includes a fixed platen to which a fixed mold is attached, a movable platen to which a movable mold is attached, and a toggle mechanism for moving the movable platen forward and backward. . Then, by operating the toggle mechanism and moving the movable platen forward and backward, the mold is closed, the mold is closed and the mold is opened, and a cavity is formed between the fixed mold and the movable mold in a state where the mold is clamped. A space is formed.
[0017]
Therefore, the resin injected from the injection nozzle is filled into the cavity space through the sprue, the runner and the gate of the mold apparatus in which the mold is clamped, and is cooled and solidified to form a molded product. In addition, a temperature controller (not shown) is provided, and a medium having a predetermined temperature is sent to the mold device by the temperature controller, whereby the temperature of the mold device is controlled and the resin in the cavity space is cooled.
[0018]
Subsequently, the mold apparatus is opened, the movable mold is retracted to separate the molded product from the fixed mold, and an ejector device (not shown) disposed on the movable mold side is operated to move the movable mold. The molded product is released from the movable mold by projecting the ejector pins from the mold.
[0019]
By the way, for example, in an injection molding machine in which a cavity is filled with a resin and then a runner and a sprue are separated from the cavity by performing gate cutting, the mold is opened. As the ejector pins protrude, the runner portion made of the resin solidified in the runner and the sprue is separately formed from the fixed mold, and the molded product made of the resin solidified in the cavity space is separately formed from the movable mold. The mold is released.
[0020]
In this case, if the runner portion and the molded product are collected by the same storage box, a process of separating the runner portion and the molded product is required, and the operation is troublesome.
[0021]
Therefore, in order to separate and remove the runner portion and the molded product that have been released and dropped, respectively, a separation chute, a runner portion recovery body, and a molded product (not shown) are provided below the mold device in the injection molding machine frame 10. A molded product take-out part P1 including a recovery body and the like is provided. Therefore, the dropped molded product is guided along the separation chute together with the runner portion, separated into the runner portion and the molded product by the separation chute, and accommodated in the runner portion collection body and the molded product collection body, respectively. . The first member is constituted by the runner portion, and the second member is constituted by the molded product.
[0022]
When the molded product is a disk, air blowing is performed as the mold is opened. Therefore, an air unit 18 including an air supply source (not shown), a valve, a venturi tube, and the like (not shown) necessary for performing the air blow is disposed adjacent to the molded product take-out part P1.
[0023]
Next, details of the molded product take-out part P1 will be described.
[0024]
FIG. 1 is a schematic view of a molded product take-out part according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a receiving plate according to an embodiment of the present invention, and FIG. 4 is a plan view of the receiving plate according to the embodiment of the present invention. is there.
[0025]
In the drawing, reference numeral 10 denotes an injection molding machine frame, and the injection molding machine frame 10 includes columns 21 provided on the front side (left side in FIG. 1) and the back side (right side in FIG. 1) of the injection molding machine, respectively. 22, upper frames 23, 24 extending horizontally at the upper ends of the columns 21, 22 and in the axial direction (longitudinal direction) of the injection molding machine, horizontally at the lower ends of the columns 21, 22, and An upper connection bar 27 connecting the lower frames 25 and 26 and the upper frames 23 and 24 extending in the axial direction of the injection molding machine, and extending from the front side to the rear side of the injection molding machine; The lower connection bar 28, which connects the frames 25, 26 and extends from the front side to the back side of the injection molding machine, and the columns 21, 22 are connected near the center in the height direction. A central connecting bar 29 that.
[0026]
A cylindrical guide member (chute) 31 is disposed between the upper frames 23 and 24 below the mold device in the mold device case 12 (FIG. 2). The guide member 31 has a wide opening 32 at the upper end and a narrow opening 33 at the lower end. When the runner portion and the molded product are dropped, the guide member 31 guides the runner portion and the molded product and scatters around. To prevent
[0027]
A receiving plate 35 as a receiving member is disposed below the guide member 31 so as to be swingable about a shaft 36, and is represented by a first position represented by a solid line and a two-dot chain line. The second position is selectively taken. For this purpose, the shaft 36 is rotatably supported by a bearing 37 attached to a central connecting bar 29, and a connecting bar 38 is fixed to a predetermined portion of the shaft 36, and a driving means is provided at the tip of the connecting bar 38. The piston rod 42 of the air cylinder 41 is connected so as to be able to advance and retreat (move in the left-right direction in FIG. 1). The air cylinder 41 is attached to the column 21 via a bracket 43, and is connected to a pneumatic circuit (not shown). Therefore, when the control unit 17 switches the switching valve disposed in the pneumatic circuit and drives the air cylinder 41 to move the piston rod 42 back and forth, the receiving plate 35 is swung. The connecting bar 38, the air cylinder 41, and the piston rod 42 constitute a moving mechanism for moving and swinging the receiving plate 35.
[0028]
The receiving plate 35 has a flat (flat) box-like shape, and is closed on three sides by side walls 45 and 46 and a back wall 47, and an upper surface serving as the runner part and a molded product introduction port 51, and a runner part A front surface serving as a discharge section 52 as a first discharge port for discharging the sewage is opened. Further, a slit portion 54 as a second discharge port for discharging a molded product is formed in a half area on the back wall 47 side of the bottom surface 53 of the receiving plate 35, and a slit portion 54 on the discharge portion 52 side of the bottom surface 53 is formed. A guide portion 55 for guiding and discharging the runner portion is formed in the area. A molded article collecting body 61 for collecting molded articles is provided below the receiving plate 35, and is provided in front of the injection molding machine for collecting a runner portion adjacent to the molded article collecting body 61. A runner part recovery body 62 is provided. The runner part recovery body 62 and the molded article recovery body 61 constitute first and second recovery parts.
[0029]
In the slit section 54, a plurality of pins 57 extend at a predetermined pitch in parallel with the side walls 45 and 46, and the pins 57 form a lattice structure. The pitch is set to a size that allows the molded product to easily pass through and does not pass through the runner portion. In this case, the pin 57 constitutes a passage blocking portion for blocking passage of the runner portion, and a gap (gap) between the pins 57 constitutes a passage permitting portion for permitting passage of the molded product. In the present embodiment, although the lattice structure is formed by the pins 57, a thin plate can be used instead of the pins 57. Further, if it is possible to easily pass the molded product and not to pass through the runner portion, the shapes of the passage preventing portion and the passage permitting portion can be changed. The receiving plate 35, the air cylinder 41 and the like constitute a separation chute.
[0030]
In the injection molding machine having the above-described configuration, when the control unit 17 switches the switching valve at the first timing and drives the air cylinder 41 to move the piston rod 42 backward (to the left in FIG. 1), the receiving plate 35 is placed in the first position, and the bottom surface 53 is inclined such that the discharge portion 52 is higher than the back wall 47. At this time, the runner portion and the molded product released by the mold opening and the ejection of the ejector pin are dropped and hit the bottom surface 53, the slit portion 54, etc., and slide from the discharge portion 52 side to the back wall 47 side. Moved. In the meantime, the molded article falls through the slit portion 54 and is collected by the molded article collecting body 61. On the other hand, since the runner cannot pass through the slit 54, the runner is further moved to the back wall 47 side and stopped against the back wall 47.
[0031]
When the runner part accumulates on the receiving plate 35 by a predetermined amount or more, the control unit 17 switches the switching valve at a timing at which the molded product and the runner part do not drop from the mold apparatus, and the air cylinder 41 To move the piston rod 42 forward (moving to the right in FIG. 1). Thereby, the receiving plate 35 is placed at the second position, the bottom surface 53 is inclined so that the discharge portion 52 is lower than the back wall 47, and the runner portion is moved from the back wall 47 side to the discharge portion 52 side. Can be At this time, since the runner part cannot pass through the slit part 54, it is moved to the discharge part 52 side, discharged from the discharge part 52, and collected by the runner part collection body 62.
[0032]
As described above, by swinging the receiving plate 35, the runner portion can be selectively discharged from the discharge portion 52 and the molded product can be selectively discharged from the slit portion 54. Therefore, since there is no need to dispose a separation chute provided with a partition plate, the molded product is not collected by the runner collecting body 62, and the runner is not collected by the molded product collecting body 61. And the runner part can be accurately recovered.
[0033]
In the present embodiment, the molded product is discharged from the slit portion 54 and the runner portion is discharged from the discharge portion 52. However, depending on the shape of the molded product, the runner portion, etc., the runner portion is discharged from the slit portion. The molded article can be discharged from the section.
[0034]
It should be noted that 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 excluded from the scope of the present invention.
[0035]
【The invention's effect】
As described above in detail, according to the present invention, in the injection molding machine, the first and second discharge ports are provided so as to be swingable below the mold device, and are provided with the swing. A receiving member for selectively discharging the first member from the first discharge port and the second member from the second discharge port, and a moving mechanism for swinging the receiving member.
[0036]
The second discharge port includes a passage blocking unit that blocks passage of the first member, and a passage permitting unit that allows passage of the second member.
[0037]
In this case, by swinging the receiving member, the first member can be selectively discharged from the first discharge port, and the second member can be selectively discharged from the second discharge port. Therefore, there is no need to dispose a separation chute provided with a partition plate, so that the first and second members can be accurately collected.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a molded product taking-out section according to an embodiment of the present invention.
FIG. 2 is a front view of the injection molding machine according to the embodiment of the present invention.
FIG. 3 is a sectional view of a receiving plate according to the embodiment of the present invention.
FIG. 4 is a plan view of a receiving plate according to the embodiment of the present invention.
[Explanation of symbols]
35 Receiving plate 38 Connecting bar 41 Air cylinder 42 Piston rod 52 Discharge part 54 Slit part 57 Pin

Claims (2)

(A) is swingably disposed below the mold apparatus, first, a second outlet, with the swing, the first member from the first outlet, the second member A receiving member for selectively discharging from the second discharge port,
(B) which has a receiving only moving mechanism for rocking the member,
(C) The injection molding machine, wherein the second discharge port includes a passage blocking unit that blocks passage of the first member, and a passage permitting unit that allows passage of the second member. The receiving member discharges the second member from the second discharge port at the first position and stores the first member, and discharges the first member from the first discharge port at the second position. The injection molding machine according to claim 1.

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