WO2015151166A1 - Injection molding machine - Google Patents

Injection molding machine Download PDF

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Publication number
WO2015151166A1
WO2015151166A1 PCT/JP2014/059480 JP2014059480W WO2015151166A1 WO 2015151166 A1 WO2015151166 A1 WO 2015151166A1 JP 2014059480 W JP2014059480 W JP 2014059480W WO 2015151166 A1 WO2015151166 A1 WO 2015151166A1
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WO
WIPO (PCT)
Prior art keywords
resin
injection
injection nozzle
air flow
molding machine
Prior art date
Application number
PCT/JP2014/059480
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French (fr)
Japanese (ja)
Inventor
中村　昌博
克昌 瀧
保志 山本
Original Assignee
Ykk株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Ykk株式会社 filed Critical Ykk株式会社
Priority to PCT/JP2014/059480 priority Critical patent/WO2015151166A1/en
Priority to TW104110493A priority patent/TWI561363B/en
Publication of WO2015151166A1 publication Critical patent/WO2015151166A1/en

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    • 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
    • B29C45/1753—Cleaning or purging, e.g. of the injection unit

Definitions

  • the present invention relates to an injection molding machine provided with a mold and an injection device provided above the mold.
  • the injection molding machine includes an injection device having a mold having an upper mold and a lower mold, and an injection cylinder provided above the mold and moving up and down toward the sprue of the upper mold.
  • the mold is closed with the upper mold and the lower mold in contact with each other, the injection cylinder is lowered, and the molten resin is injected with the injection nozzle of the injection cylinder in contact with the sprue of the upper mold. Is filled with molten resin.
  • a vertical injection molding machine in which the injection cylinder is then lifted and the mold is opened with the upper mold and the lower mold separated from each other so that the injection molded product is taken out (see Patent Document 1). ).
  • the fore-color resin remaining in the injection cylinder after the resin is idly injected from the injection nozzle Is discharged so that it is not mixed with the next color resin.
  • the idle injection operation is to raise the injection cylinder and inject the resin in a state where the injection nozzle is separated from the sprue of the upper mold.
  • the resin discharged in the idling operation that is, the idling resin is recovered when it is injected and the molding operation is performed after the next color resin is injected.
  • the injection cylinder is raised to form a vertical space between the injection nozzle and the upper mold, and a receiving tool is inserted into the space to be below the injection nozzle.
  • the empty injection resin discharged from the injection nozzle is accumulated in the receiving tool. Then, after the idle injection operation is completed, the empty injection resin is recovered by pulling the receptacle out of the space.
  • the vertical injection molding machine disclosed in Patent Document 1 collects and collects empty injection resin as resin waste in a receiver inserted between the upper mold and the injection nozzle of the injection cylinder, the capacity of the receiver is reduced. Large, a large space in the vertical direction is required below the injection nozzle, and the up / down stroke of the injection cylinder becomes long. For this reason, the overall height of the vertical injection molding machine becomes high, which may make maintenance, inspection, etc. difficult. Moreover, when the raising / lowering stroke of the injection cylinder cannot be increased due to a height restriction or the like, the empty injection resin may not be collected by the support. Further, when the amount of the empty injection resin is large, it must be exchanged for a receptacle having a large capacity, and it is necessary to prepare a plurality of receptacles having different capacities.
  • the present invention has been made in order to solve the above-described problems.
  • the object of the present invention is to continuously and continuously discharge the empty injection resin discharged from the injection nozzle of the injection cylinder from the injection nozzle using the air flow. By making it possible to recover, a vertical injection molding machine that does not require a vertical space for storing the empty injection resin below the injection nozzle and that can shorten the lifting stroke of the injection cylinder is provided.
  • the present invention includes a mold 2, an injection device 3 that moves the injection nozzle 30 across an injection position where the resin is injected from the injection nozzle 30 into the mold 2, and a standby position where the resin is discharged from the injection nozzle 30.
  • An injection molding machine including a resin recovery device 4 for recovering the resin d discharged from the injection nozzle 30;
  • the resin recovery device 4 includes a resin suction portion 4a that sucks the resin d discharged from the injection nozzle 30, and an air flow that changes the discharge direction of the resin d discharged from the injection nozzle 30 toward the resin suction portion 4a. It is an injection molding machine characterized by having an air flow forming part 4b for forming
  • the air flow forming part 4b can have an air ejection part for ejecting air toward the resin suction part 4a.
  • the resin suction part 4a includes a collection position for collecting the resin d below the injection nozzle 30 at the standby position, and an injection position for the injection nozzle 30 to inject the resin into the mold 2. It is possible to move freely over a retracted position that does not interfere with the injection nozzle 30 when moving to.
  • the mold 2 includes a movable mold 2b and a fixed mold 2a, and the movable mold 2b has a hole 25 opened to communicate with the sprue 27, and an injection nozzle is provided in the hole 25. 30 is inserted to form a ring-shaped gap S between the injection nozzle 30 and the hole 25;
  • the resin suction part 4a can be moved between a collection position where the resin suction part 4a is inserted into the gap S and collects the resin d, and a retreat position where the resin d is removed from the gap S.
  • the air flow forming unit 4b forms an air flow toward the resin suction unit 4a and sucks the resin d, and when the injection nozzle 30 descends to the injection position. It can be freely moved over a retreat position where it does not interfere with the injection nozzle 30.
  • the flow direction of the empty injection resin can be efficiently and reliably directed toward the tip of the resin suction portion 4a, and the air flow forming portion 4b is obstructed when the injection nozzle 30 is lowered to the injection position. do not become.
  • the air flow forming portion 4b is attached to the resin suction portion 4a, and the air flow forming portion 4b can be moved together with the resin suction portion 4a between the suction auxiliary position and the retreat position. .
  • the air flow forming portion 4b includes a bracket 60 and an air ejection portion 61 attached to the bracket 60.
  • the bracket 60 faces the injection port 30a of the injection nozzle 30 when the air flow forming portion 4b is in the suction assist position, and the resin d can be directed to the resin suction portion 4a by the air ejected from the air ejection portion 61. .
  • the empty injection resin can be collected directly and continuously from the injection nozzle 30 using the air flow, a vertical space for storing the empty injection resin under the injection nozzle 30 is not necessary.
  • the raising / lowering stroke of the injection cylinder 31 can be shortened. Therefore, the overall height of the vertical injection molding machine can be lowered to facilitate maintenance and inspection.
  • the amount of the empty injection resin can be recovered even if it is large or small.
  • FIG. 1 is a front view schematically showing an embodiment of a vertical injection molding machine of the present invention. It is an expanded sectional view of an empty injection resin collection part.
  • FIG. 3 is a plan view of FIG. 2.
  • FIG. 1 is a front view schematically showing a vertical injection molding machine according to the present invention.
  • a vertical injection molding machine 1 includes a machine body 1a, a mold 2 attached to the machine body 1a, and a metal mold of the machine body 1a.
  • An injection device 3 attached above the mold 2 and a resin recovery device 4 for recovering the resin are provided.
  • the mold 2 includes a lower mold 2a, an upper mold 2b, and a mold opening / closing portion 2c that makes the lower mold 2a and the upper mold 2b open and closed.
  • the lower mold 2 a is a fixed mold having a fixed plate 20 fixedly attached to the body 1 a and a lower mold 21 attached to the fixed plate 20.
  • the upper mold 2b is a movable mold having a movable plate 22 attached to the machine body 1a so as to be movable up and down, and an upper mold 23 attached to the movable plate 22.
  • the mold opening / closing part 2c is provided with a guide rod 24 connected to the movable plate 22 and a mold clamping cylinder (not shown) that moves the guide rod 24 up and down.
  • the lower mold 2a may be a movable mold and the upper mold 2b may be a fixed mold.
  • the injection device 3 includes an injection cylinder 31 having an injection nozzle 30 and a pair of elevating cylinders 32 attached to the airframe 1a.
  • the injection cylinder 31 is attached to a plate 33 that is moved up and down by the pair of elevating cylinders 32.
  • the injection nozzle 30 is moved up and down between the standby position and the injection position by moving the injection cylinder 31 up and down by the cylinder 32.
  • a screw that injects molten resin from the injection nozzle 30 into the mold 2 is provided inside the injection cylinder 31.
  • the screw inside the injection cylinder 31 is rotated by a rotation drive means (not shown) and reciprocates inside the injection cylinder 31 by a reciprocation means (not shown).
  • FIG. 1 only the outline of the airframe 1a is shown by a two-dot chain line, and the specific mounting structure of the mold 2 and the injection device 3 is not shown.
  • the movable plate 22 has a hole 25 extending in the vertical direction through which the injection cylinder 31 is inserted.
  • the upper mold 23 has a recess 26 that is continuous with the hole 25 and fits the tip of the injection nozzle 30, and a sprue 27 that is continuous with the recess 26.
  • the sprue 27 communicates with the molding space 2 d of the mold 2. ing. That is, the upper mold 2b has a hole 25 that opens on the upper surface and through which the injection cylinder 31 is inserted, and a sprue 27 that communicates the hole 25 with the molding space 2d.
  • the injection nozzle 30 is separated from the sprue 27 and is inserted into the upper part of the hole 25 of the movable plate 22 in the mold closed state as shown in FIG.
  • a ring-shaped gap S is provided between the hole 25 of the movable plate 22 and the tip portion of the injection nozzle 30.
  • An empty injection operation for discharging the molten resin from the injection nozzle 30 is performed in a state where the injection nozzle 30 is in a standby position away from the sprue 27 of the mold 2.
  • the molten resin discharged from the injection nozzle 30 does not enter the concave portion 26 of the mold 2, the sprue 27 continuous with the concave portion 26, and the molding space 2 d of the mold 2. .
  • the resin discharged from the injection nozzle 30 when the screw inside the injection cylinder 31 rotates or the screw moves is the empty injection resin d.
  • the injection cylinder 31 is lowered and the tip of the injection cylinder 31 is inserted into the hole 25, and the tip of the injection nozzle 30 is fitted into the recess 26 to become an injection position.
  • the molten resin is injected from the injection nozzle 30, and the injection resin is filled from the sprue 27 into the molding space 2d of the mold 2 with the molten resin.
  • the resin recovery device 4 includes a resin suction part 4a that absorbs the resin discharged from the injection nozzle 30, that is, the empty injection resin d, an air flow forming part 4b that makes the resin suction part 4a easily suck the empty injection resin d, And a transfer unit 4c that transfers the empty injection resin d sucked by the resin suction unit 4a to a collection unit such as a hopper.
  • the tip of the resin suction part 4a is located below the injection nozzle 30 at the standby position.
  • the resin suction part 4a sucks air from the front end part, circulates air toward the base end part, sucks the empty injection resin from the front end part by the air flow, and conveys it toward the base end part.
  • the air flow forming portion 4b forms an air flow toward the tip of the resin suction portion 4a, and the flow direction of the empty injection resin is made to flow toward the tip of the resin suction portion 4a by the air flow to facilitate suction.
  • the transfer part 4c is continuous with the base end part of the resin suction part 4a, and transfers the transported empty injection resin to a recovery part such as a hopper.
  • the front end portion 4a-1 of the resin suction portion 4a includes a collection position for collecting the resin discharged from the injection nozzle 30 below the injection nozzle 30 at the standby position described above, and the injection nozzle 30 at the injection position. When it is lowered to the position, it does not collide with the injection nozzle 30 and moves over the retreat position away from the injection nozzle 30. Note that the tip 4a-1 of the resin suction portion 4a does not have to interfere with the lowering of the injection nozzle 30 to the injection position, and does not have to move to the retracted position while waiting at the collection position. .
  • the air flow forming part 4b attached to the tip part 4a-1 of the resin suction part 4a is located below the injection nozzle 30 in the standby position, and is located below the injection nozzle 30 in the standby position to the resin suction part 4a.
  • This is a suction auxiliary member that forms an air flow toward the front and makes it easy to suck the empty injection resin d from the front end portion 4a-1 of the resin suction portion 4a.
  • the air flow forming part 4b forms an air flow toward the resin suction part 4a at a lower position away from the injection nozzle 30, and sucks the empty injection resin d discharged from the tip part 4a-1 of the resin suction part 4a.
  • the suction auxiliary position and the retreat position apart from the injection nozzle 30 are moved without colliding with the injection nozzle 30.
  • the air flow forming portion 4b does not need to move to the retracted position while remaining in the suction assisting position as long as it does not get in the way.
  • the resin suction part 4a can suck the empty injection resin d discharged downward from the injection nozzle 30 by bringing the tip part 4a-1 of the resin suction part 4a closer to the lower part of the injection nozzle 30. Further, as the resin suction portion 4a moves downward, the air flow forming portion 4b is moved closer to the lower side of the injection nozzle 30 to change the discharge direction of the empty injection resin d discharged downward from the injection nozzle 30. It can be directed to the tip 4a-1 of the suction part 4a. The discharge direction of the empty injection resin d discharged downward from the injection nozzle 30 is bent and changed by the air jetted from the air flow forming part 4b toward the resin suction part 4a.
  • the resin recovery apparatus 4 of the present invention sucks and conveys the empty injection resin d discharged from the injection nozzle 30 directly and continuously from the injection nozzle 30 using the flow of air,
  • the empty injection resin d does not collect in the hole 25 or the sprue 27 below the injection nozzle 30, and the vertical space for storing the empty injection resin d below the injection nozzle 30 or the storage for storing the empty injection resin d. Since a container is unnecessary, the raising / lowering stroke of the injection cylinder 31 can be shortened. As a result, the overall height of the vertical injection molding machine can be lowered to facilitate maintenance and inspection. Further, the empty injection resin d can be recovered in the same way regardless of whether the amount of the empty injection resin d is large or small.
  • the resin suction part 4a shown in FIG. 1 has a proximal end side cylinder 40 and a distal end side cylinder 41 that is slidably fitted to the proximal end side cylinder 40.
  • the proximal end side cylinder 40 is attached and fixed to the machine body 1 a, and the distal end portion 41 a of the distal end side cylinder 41 is in an inclined vertical posture toward the hole 25 of the movable plate 22.
  • the distal end portion 41a of the distal end side cylinder 41 is the distal end portion 4a-1 of the resin suction portion 4a.
  • a telescopic cylinder 43 is attached to the base end side cylinder 40, its piston rod 43a is connected to the front end side cylinder 41, and the front end side cylinder 41 is expanded and contracted by expanding and contracting the piston rod 43a of the expansion cylinder 43. It is.
  • An air flow forming portion 4 b is attached to the distal end portion 41 a of the distal end side cylinder 41.
  • the distal end portion 41a is inserted into the ring-shaped gap S between the hole 25 of the movable plate 22 and the injection nozzle 30 at the standby position, and the empty injection resin d is recovered. And a suction assist position where the air flow forming part 4b is inserted below the injection nozzle 30 at the standby position and inserted into the gap S.
  • the distal end portion 41a and the air flow forming portion 4b come out of the ring-shaped gap S and move to the retracted positions indicated by the two-dot chain lines in FIG.
  • the distal end side cylinder 41 is expanded and contracted to move to the collection position and the retracted position, whereby the air flow forming portion 4b moves to the suction assist position and the retracted position. Since the air flow forming portion 4b moves together with the distal end side cylinder 41 by the expansion / contraction cylinder 43, it is not necessary to separately provide a mechanism for moving the air flow forming portion 4b. In addition, you may provide the mechanism which moves independently, without attaching the air flow formation part 4b to the front end side cylinder 41.
  • the empty injection resin d is conveyed upward along the front end side cylinder 41.
  • the transfer part 4 c is a downward chute 44, and the upper part of the chute 44 and the base end part of the base end side cylinder 40 are connected by a connecting container 45. Accordingly, the empty injection resin d sucked from the distal end portion 41 a of the distal end side cylinder 41 is conveyed along the proximal end side cylinder 40 to the upper portion of the chute 44. Then, by being transported downward along the chute 44, the empty injection resin d is recovered by a recovery unit for the empty injection resin d (not shown).
  • the distal end portion 41 a of the distal end side cylinder 41 is below the injection nozzle 30 in the standby position, and is a ring-shaped gap between the hole 25 of the movable plate 22 and the injection nozzle 30.
  • the air is sucked from the tip opening 41b located at S and opened to the tip portion 41a as shown by the arrow a, and the sucked air flows toward the base side barrel 40 inside the tip side barrel 41.
  • the inner side of the distal end side cylinder 41 or the inner side of the proximal end side cylinder 40 is arranged. Negative pressure may be used.
  • the negative pressure generating means for making the inside of the base end side cylinder 40 negative air is sent from the outside into the base end side cylinder 40, and the air is above the base end side cylinder 40 (base end part). Make it flow toward.
  • a cylindrical valve 53 having an annular recess 51 and an ejection hole 52 toward the proximal end side in the proximal end side cylinder body 40.
  • a pneumatic hose (not shown) is connected to the hole 40a, and air is sent to the annular recess 51 so that the air flows from the ejection hole 52 toward the base end side as indicated by an arrow b.
  • the negative pressure generating means 50 With such a negative pressure generating means 50, the air flowing from the distal end side cylinder 41 to the proximal end side cylinder 40 can be discharged to the atmosphere. , It can be discharged directly to the chute 44 described above.
  • the negative pressure generating means may be a vacuum pump. However, when the vacuum pump is used, the empty injection resin d conveyed along with the air flow reaches the suction port of the vacuum pump, so that it is difficult to discharge to the chute 44.
  • the distal end side cylinder body 41 is changed to the proximal end side cylinder body 40.
  • the empty injection resin d can be discharged to the chute 44 through.
  • the air flow forming part 4 b includes a bracket 60 and an air ejection part 61 attached to the bracket 60.
  • the bracket 60 has an upward U-shape formed by a bottom plate 62 and a pair of side plates 63, 63 provided at both ends in the width direction of the bottom plate 62, and the pair of side plates 63 is connected to the tip of the distal end side cylinder 41.
  • the bracket 60 is attached to the distal end portion 41a of the distal end side cylinder 41 by being fixed to the outer peripheral surface of 41a with a bolt or the like.
  • a pipe 64 is attached to a bottom plate 62 separated from the front end side cylinder 41, and a pneumatic feed hose (not shown) is connected to the pipe 64.
  • the pipe 64 has an ejection hole 64a toward the distal end side cylinder 41, and as shown by an arrow c, air is ejected from the ejection hole 64a toward the distal end cylinder 41, and a bottom plate 62 and a pair of side plates 63 are provided. , 63 and an ejection hole 64a of a pipe 64 attached to the bracket 60 form an air flow toward the distal end portion 41a of the distal end side cylinder 41. Further, the molten resin discharged from the injection nozzle 30 by the bracket 60 is prevented from entering the recess 26 of the mold 2, the sprue 27 continuous with the recess 26, and the molding space 2 d of the mold 2. .
  • the distal end portion 41a of the distal end side cylinder 41 and the air ejection portion 61 of the bracket 60 are orthogonal to the injection center line A, which is the axis of the injection port 30a of the injection nozzle 30 that moves up and down. Located on both sides. In FIG. 2, the injection center line A is directed in the vertical direction, the distal end portion 41a of the distal end side cylinder 41 is located on the left side in the left-right direction perpendicular to the injection center line A, and the air ejection portion 61 is located on the right side.
  • the idle injection resin d that is idly injected from the injection port 30 a of the injection nozzle 30 by performing the idle injection operation of the injection cylinder 31 is injected toward the space between the tip end portion 41 a of the tip end side cylinder 41 and the air ejection portion 61. Is done.
  • the empty injection resin d initially discharged from the injection port 30a of the injection nozzle 30 at the start of the empty injection operation is the air flow indicated by the arrow a sucked from the tip opening 41b of the tip side cylinder 41, Then, the air flow shown by the arrow c ejected from the air ejection part 61 bends toward the distal end opening 41b of the distal end side cylinder 41 and flows into and sucked into the distal end opening 41b.
  • the empty injection resin d is sequentially conveyed into the distal end side cylinder 41 and the proximal end side cylinder 40 by the flow of air, and the proximal end side cylinder 40 and the chute 44 are connected from the proximal end side cylinder 40. It is discharged to the chute 44 through the connecting container 45.
  • the empty injection resin d since the empty injection resin d firstly injected is directly sucked into the distal end side cylinder 41, and thereafter, the empty injection resin d that has been injected empty is sequentially sucked and conveyed, the empty injection resin d.
  • the injection nozzle 30 at the standby position is inserted into the upper portion of the hole 25 of the movable plate 22, and the tip-side cylinder 41 is inserted into the ring-shaped gap S between the injection nozzle 30 and the hole 25. Since the distal end portion 41a and the bracket 60 are inserted, the vertical space formed between the injection nozzle 30 and the movable plate (upper mold 2b) can be reduced, and the vertical stroke of the injection cylinder 31 can be shortened. .
  • the hole 25 of the movable plate 22 has a funnel shape in which the upper part has a large diameter and gradually decreases in diameter toward the lower part, so that the tip part 41a of the tip side cylinder 41 and the bracket 60 are formed in the ring-shaped gap S described above. Is easy to insert.
  • the ring-shaped gap S is not limited to a circular ring shape, but may be a square shape such as a quadrangle or other shapes. In the ring-shaped gap S, there is a space in which the injection nozzle 30 and the distal end portion 41a of the distal end side cylinder 41 can be inserted.
  • the air flow forming portion 4b includes a bracket 60 that is positioned below the injection nozzle 30 and faces the injection port 30a, the empty injection resin d enters the molding space 2d of the mold 2 due to malfunction or the like. Can be prevented.
  • the distance between the pair of side plates 63 of the bracket 60 is wider than the diameter of the injection nozzle 30, and the bracket 60 waits when the bracket 60 is moved between the suction assist position and the retracted position due to the expansion and contraction of the distal end side cylinder 41. There is no interference with the injection nozzle 30 at the position.
  • the distal end side cylinder 41 of the resin suction part 4a is expanded and contracted to move the distal end 41a across the collection position and the retracted position. You may make it move the front-end
  • the bracket 60 of the air flow forming portion 4b is attached to the distal end portion 41a of the distal end side cylinder 41, and moved together with the distal end side cylinder 41 over the suction assist position and the retracted position. You may move independently by the drive means.
  • the injection device 3 and the mold 2 are not limited to the vertical injection molding machine as shown in FIG.
  • the injection nozzle moves in parallel with the floor with the injection molding machine installed on the floor installed horizontally, or the floor It may be a horizontal injection molding machine that moves with the injection nozzle slightly inclined with respect to the surface. Even in a horizontal injection molding machine, the resin recovery device 4, the resin suction part 4a, and the air flow forming part 4b may be used.
  • SYMBOLS 1 Vertical type injection molding machine, 2 ... Mold, 2a ... Lower mold, 2b ... Upper mold, 3 ... Injection device, 4 ... Resin recovery device, 4a ... Resin suction part, 4b ... Air flow formation part, 25 ... hole, 27 ... sprue, 30 ... injection nozzle, 30a ... injection port, 31 ... injection cylinder, 40 ... base end side cylinder, 41 ... tip end side cylinder, 50 ... negative pressure generating means, 60 ... bracket, 61 ... air ejection part, A ... injection center line, S ... gap.

Abstract

Provided is an injection molding machine with which space for collecting blank injection resin below the injection nozzle is unnecessary and the injection cylinder stroke can be shortened. Below the injection nozzle (30), a resin-sucking part (4a) and an air flow-forming part (4b) for changing the discharge direction of resin discharged from the injection nozzle (30) by bending the discharge direction toward the resin-sucking part (4a) are provided. Continuously recovering resin directly from the injection nozzle (30) using air flow obviates the need for a container or space for collecting resin below the injection nozzle (30) and shortens the movement stroke of the injection cylinder (31).

Description

射出成形機Injection molding machine
　本発明は、金型と、その金型の上方に設けた射出装置を備えた射出成形機に関する。 The present invention relates to an injection molding machine provided with a mold and an injection device provided above the mold.
　射出成形機としては、上部金型と下部金型を有する金型と、この金型の上方に設けられ、上部金型のスプルーに向けて昇降する射出シリンダを有する射出装置を備え、金型を、上部金型と下部金型が接した型閉じ状態とし、射出シリンダを下降して上部金型のスプルーに射出シリンダの射出ノズルを接した状態で溶融樹脂を射出し、金型の成形用空間に溶融樹脂を充填する。この後に射出シリンダを上昇し、金型を、上部金型と下部金型が離隔した型開き状態として射出成形品を取り出すようにした縦型の射出成形機が知られている（特許文献１参照）。 The injection molding machine includes an injection device having a mold having an upper mold and a lower mold, and an injection cylinder provided above the mold and moving up and down toward the sprue of the upper mold. The mold is closed with the upper mold and the lower mold in contact with each other, the injection cylinder is lowered, and the molten resin is injected with the injection nozzle of the injection cylinder in contact with the sprue of the upper mold. Is filled with molten resin. There is known a vertical injection molding machine in which the injection cylinder is then lifted and the mold is opened with the upper mold and the lower mold separated from each other so that the injection molded product is taken out (see Patent Document 1). ).
　縦型の射出成形機において射出成形する樹脂の種類を切り替える際、例えば射出成形する樹脂の色を切り替える際には、射出ノズルから樹脂を空射出動作して射出シリンダに残留している前色樹脂を全て排出し、次色樹脂と混ざることがないようにしている。
　空射出動作とは、射出シリンダを上昇して射出ノズルを上部金型のスプルーと離隔した状態で射出し樹脂を排出することである。
　空射出動作で排出された樹脂、つまり空射出樹脂は次色樹脂を射出して成形動作する際に不要になるので、回収している。 When switching the type of resin to be injection-molded in a vertical injection molding machine, for example, when switching the color of the resin to be injection-molded, the fore-color resin remaining in the injection cylinder after the resin is idly injected from the injection nozzle Is discharged so that it is not mixed with the next color resin.
The idle injection operation is to raise the injection cylinder and inject the resin in a state where the injection nozzle is separated from the sprue of the upper mold.
The resin discharged in the idling operation, that is, the idling resin is recovered when it is injected and the molding operation is performed after the next color resin is injected.
　例えば、特許文献１に開示したように、射出シリンダを上昇して射出ノズルと上部金型との間に上下方向のスペースを形成し、そのスペースに受け具を挿入して射出ノズルの下方とし、射出ノズルから空射出された空射出樹脂が受け具に溜まるようにする。
　そして、空射出動作終了後に受け具をスペースから引き出すことで空射出樹脂を回収している。 For example, as disclosed in Patent Literature 1, the injection cylinder is raised to form a vertical space between the injection nozzle and the upper mold, and a receiving tool is inserted into the space to be below the injection nozzle. The empty injection resin discharged from the injection nozzle is accumulated in the receiving tool.
Then, after the idle injection operation is completed, the empty injection resin is recovered by pulling the receptacle out of the space.
特許第３２８７６６９号公報Japanese Patent No. 3287669
　特許文献１に開示した縦型の射出成形機は、上部金型と射出シリンダの射出ノズルとの間に挿入した受け具に空射出樹脂を樹脂屑として溜めて回収するので、受け具の容量が大きく、射出ノズルの下方に上下方向に大きなスペースが必要で、射出シリンダの昇降ストロークが長くなる。
　このために、縦型の射出成形機の全高が高くなり、保守、点検等がやりづらくなることがある。
　また、高さ制限などで射出シリンダの昇降ストロークを長くできない場合には、受け具による空射出樹脂の回収ができないことがある。
　さらに、空射出樹脂の量が多い場合には、容量の大きな受け具と交換しなければならず、容量の異なる複数の受け具を準備する必要がある。 Since the vertical injection molding machine disclosed in Patent Document 1 collects and collects empty injection resin as resin waste in a receiver inserted between the upper mold and the injection nozzle of the injection cylinder, the capacity of the receiver is reduced. Large, a large space in the vertical direction is required below the injection nozzle, and the up / down stroke of the injection cylinder becomes long.
For this reason, the overall height of the vertical injection molding machine becomes high, which may make maintenance, inspection, etc. difficult.
Moreover, when the raising / lowering stroke of the injection cylinder cannot be increased due to a height restriction or the like, the empty injection resin may not be collected by the support.
Further, when the amount of the empty injection resin is large, it must be exchanged for a receptacle having a large capacity, and it is necessary to prepare a plurality of receptacles having different capacities.
　本発明は、前述の課題を解決するためになされたもので、その目的は、射出シリンダの射出ノズルから排出された空射出樹脂を、空気の流れを利用して射出ノズルから直接に連続して回収できるようにすることで、射出ノズルの下方に空射出樹脂を溜める上下方向のスペースが不要で射出シリンダの昇降ストロークを短くできる縦型の射出成形機とすることである。 The present invention has been made in order to solve the above-described problems. The object of the present invention is to continuously and continuously discharge the empty injection resin discharged from the injection nozzle of the injection cylinder from the injection nozzle using the air flow. By making it possible to recover, a vertical injection molding machine that does not require a vertical space for storing the empty injection resin below the injection nozzle and that can shorten the lifting stroke of the injection cylinder is provided.
　本発明は、金型２と、射出ノズル３０から金型２内に樹脂を射出する射出位置と、射出ノズル３０から樹脂を排出する待機位置とに渡って射出ノズル３０を移動する射出装置３と、射出ノズル３０から排出された樹脂ｄを回収する樹脂回収装置４とを備えた射出成形機であって、
　前記樹脂回収装置４は、射出ノズル３０から排出された樹脂ｄを吸引する樹脂吸引部４ａと、射出ノズル３０から排出された樹脂ｄの排出方向を樹脂吸引部４ａに向かう向きへ変化させる空気流れを形成する空気流れ形成部４ｂを有していることを特徴とする射出成形機である The present invention includes a mold 2, an injection device 3 that moves the injection nozzle 30 across an injection position where the resin is injected from the injection nozzle 30 into the mold 2, and a standby position where the resin is discharged from the injection nozzle 30. An injection molding machine including a resin recovery device 4 for recovering the resin d discharged from the injection nozzle 30;
The resin recovery device 4 includes a resin suction portion 4a that sucks the resin d discharged from the injection nozzle 30, and an air flow that changes the discharge direction of the resin d discharged from the injection nozzle 30 toward the resin suction portion 4a. It is an injection molding machine characterized by having an air flow forming part 4b for forming
　本発明の射出成形機においては、前記空気流れ形成部４ｂは、樹脂吸引部４ａに向けて空気を噴出する空気噴出部を有するようにできる。 In the injection molding machine of the present invention, the air flow forming part 4b can have an air ejection part for ejecting air toward the resin suction part 4a.
　このようにすれば、空気によって空射出樹脂が樹脂吸引部４ａに向けて曲がるので、空射出樹脂を樹脂吸引部４ａでスムーズに吸引して搬送できる。 In this way, since the empty injection resin is bent toward the resin suction part 4a by the air, the empty injection resin can be smoothly sucked and conveyed by the resin suction part 4a.
　本発明の射出成形機においては、前記樹脂吸引部４ａは、待機位置にある射出ノズル３０の下方で樹脂ｄを回収する回収位置と、射出ノズル３０が金型２内に樹脂を射出する射出位置へ移動する時に射出ノズル３０と干渉しない退避位置とに渡って移動自在とすることができる。 In the injection molding machine of the present invention, the resin suction part 4a includes a collection position for collecting the resin d below the injection nozzle 30 at the standby position, and an injection position for the injection nozzle 30 to inject the resin into the mold 2. It is possible to move freely over a retracted position that does not interfere with the injection nozzle 30 when moving to.
　このようにすれば、樹脂吸引部４ａの先端部を射出ノズル３０に接近した回収位置として空射出樹脂を効率良く、確実に吸引できるようにできると共に、射出ノズル３０を射出位置へ移動するときに樹脂吸引部４ａの先端部が邪魔にならない。 In this way, it is possible to efficiently and surely suck the empty injection resin with the distal end portion of the resin suction portion 4a as a collection position approaching the injection nozzle 30, and when the injection nozzle 30 is moved to the injection position. The tip of the resin suction part 4a does not get in the way.
　本発明の射出成形機においては、金型２は可動金型２ｂと固定金型２ａを備え、可動金型２ｂは、スプルー２７に連通し開口した孔２５を有し、この孔２５に射出ノズル３０が挿入されて射出ノズル３０と孔２５との間にリング状の空隙Ｓを形成し、
　前記樹脂吸引部４ａは、前記空隙Ｓに挿入されて樹脂ｄを回収する回収位置と空隙Ｓから抜け出た退避位置とに亘って移動するようにできる。 In the injection molding machine of the present invention, the mold 2 includes a movable mold 2b and a fixed mold 2a, and the movable mold 2b has a hole 25 opened to communicate with the sprue 27, and an injection nozzle is provided in the hole 25. 30 is inserted to form a ring-shaped gap S between the injection nozzle 30 and the hole 25;
The resin suction part 4a can be moved between a collection position where the resin suction part 4a is inserted into the gap S and collects the resin d, and a retreat position where the resin d is removed from the gap S.
　このようにすれば、待機位置の射出ノズル３０と可動金型２ｂとの間に上下方向のスペースが不要であるから、射出シリンダ３１の昇降ストロークをより短くできる。 In this way, since no vertical space is required between the injection nozzle 30 at the standby position and the movable mold 2b, the lifting stroke of the injection cylinder 31 can be further shortened.
　本発明の射出成形機においては、前記空気流れ形成部４ｂは、樹脂吸引部４ａに向かう空気流れを形成して樹脂ｄを吸引する吸引補助位置と、射出ノズル３０が射出位置へ下降する際に射出ノズル３０と干渉しない退避位置とに渡って移動自在とすることができる。 In the injection molding machine of the present invention, the air flow forming unit 4b forms an air flow toward the resin suction unit 4a and sucks the resin d, and when the injection nozzle 30 descends to the injection position. It can be freely moved over a retreat position where it does not interfere with the injection nozzle 30.
　このようにすれば、空射出樹脂の流れ方向を効率良く、確実に樹脂吸引部４ａの先端部に向けることができると共に、射出ノズル３０を射出位置に下降する際に空気流れ形成部４ｂが邪魔にならない。 In this way, the flow direction of the empty injection resin can be efficiently and reliably directed toward the tip of the resin suction portion 4a, and the air flow forming portion 4b is obstructed when the injection nozzle 30 is lowered to the injection position. do not become.
　本発明の射出成形機においては、前記空気流れ形成部４ｂを樹脂吸引部４ａに取り付け、前記空気流れ形成部４ｂは樹脂吸引部４ａとともに吸引補助位置と退避位置とに渡って移動するようにできる。 In the injection molding machine according to the present invention, the air flow forming portion 4b is attached to the resin suction portion 4a, and the air flow forming portion 4b can be moved together with the resin suction portion 4a between the suction auxiliary position and the retreat position. .
　このようにすれば、空気流れ形成部４ｂを移動する機構が不要であるから、構成を簡単にできる。 In this way, since the mechanism for moving the air flow forming portion 4b is unnecessary, the configuration can be simplified.
　本発明の射出成形機においては、前記空気流れ形成部４ｂは、ブラケット６０と、このブラケット６０に取り付けた空気噴出部６１を備え、
　前記空気流れ形成部４ｂが前記吸引補助位置にあるときにブラケット６０が射出ノズル３０の射出口３０ａと対向し、空気噴出部６１から噴出した空気によって樹脂ｄを樹脂吸引部４ａに向かうようにできる。 In the injection molding machine of the present invention, the air flow forming portion 4b includes a bracket 60 and an air ejection portion 61 attached to the bracket 60.
The bracket 60 faces the injection port 30a of the injection nozzle 30 when the air flow forming portion 4b is in the suction assist position, and the resin d can be directed to the resin suction portion 4a by the air ejected from the air ejection portion 61. .
　このようにすれば、射出ノズル３０から排出された空射出樹脂はブラケット６０に向かうので、誤動作などで空射出樹脂が回収されない場合に、その空射出樹脂が可動金型２ｂのスプルー２７に流れることを防止できる。 In this way, since the empty injection resin discharged from the injection nozzle 30 is directed to the bracket 60, if the empty injection resin is not recovered due to a malfunction or the like, the empty injection resin flows into the sprue 27 of the movable mold 2b. Can be prevented.
　本発明によれば、空射出樹脂を空気の流れを利用して射出ノズル３０から直接に連続して回収できるので、射出ノズル３０の下方に空射出樹脂を溜める上下方向のスペースが不要であるから、射出シリンダ３１の昇降ストロークを短くできる。
　したがって、縦型の射出成形機の全高を低くして、保守、点検等がやり易くなる。
　また、空射出樹脂の量が多くても、少なくても回収できる。 According to the present invention, since the empty injection resin can be collected directly and continuously from the injection nozzle 30 using the air flow, a vertical space for storing the empty injection resin under the injection nozzle 30 is not necessary. The raising / lowering stroke of the injection cylinder 31 can be shortened.
Therefore, the overall height of the vertical injection molding machine can be lowered to facilitate maintenance and inspection.
In addition, the amount of the empty injection resin can be recovered even if it is large or small.
本発明の縦型の射出成形機の実施の形態を概略的に示す正面図である。1 is a front view schematically showing an embodiment of a vertical injection molding machine of the present invention. 空射出樹脂回収部分の拡大断面図である。It is an expanded sectional view of an empty injection resin collection part. 図２の平面図である。FIG. 3 is a plan view of FIG. 2.
　図１は、本発明の縦型の射出成形機を概略的に示す正面図で、縦型の射出成形機１は、機体１ａと、この機体１ａに取り付けた金型２と、機体１ａの金型２の上方に取り付けた射出装置３と、樹脂を回収する樹脂回収装置４を備えている。 FIG. 1 is a front view schematically showing a vertical injection molding machine according to the present invention. A vertical injection molding machine 1 includes a machine body 1a, a mold 2 attached to the machine body 1a, and a metal mold of the machine body 1a. An injection device 3 attached above the mold 2 and a resin recovery device 4 for recovering the resin are provided.
　金型２は下部金型２ａと、上部金型２ｂと、この下部金型２ａと上部金型２ｂを型開き状態、型閉じ状態とする型開閉部２ｃを備えている。
　下部金型２ａは、機体１ａに固定して取り付けた固定プレート２０と、この固定プレート２０に取り付けた下型２１を有した固定金型である。
　上部金型２ｂは、機体１ａに上下動可能に取り付けた可動プレート２２と、この可動プレート２２に取り付けた上型２３を有した可動金型である。 The mold 2 includes a lower mold 2a, an upper mold 2b, and a mold opening / closing portion 2c that makes the lower mold 2a and the upper mold 2b open and closed.
The lower mold 2 a is a fixed mold having a fixed plate 20 fixedly attached to the body 1 a and a lower mold 21 attached to the fixed plate 20.
The upper mold 2b is a movable mold having a movable plate 22 attached to the machine body 1a so as to be movable up and down, and an upper mold 23 attached to the movable plate 22.
　型開閉部２ｃは可動プレート２２に連結したガイド杆２４と、そのガイド杆２４を上下に移動する図示しない型締め用シリンダを設けている。 The mold opening / closing part 2c is provided with a guide rod 24 connected to the movable plate 22 and a mold clamping cylinder (not shown) that moves the guide rod 24 up and down.
　そして、型締め用シリンダでガイド杆２４を下方に移動することで上部金型２ｂが下方に移動し、図１に示すように上型２３と下型２１が接触した型閉じ状態となる。
　型締めシリンダでガイド杆２４を上方に移動することで上部金型２ｂが上方に移動し、上型２３と下型２１が離れた型開き状態となる。
　なお、下部金型２ａを可動金型とし、上部金型２ｂを固定金型としても良い。 Then, by moving the guide rod 24 downward by the mold clamping cylinder, the upper mold 2b is moved downward, and the upper mold 23 and the lower mold 21 are in contact with each other as shown in FIG.
By moving the guide rod 24 upward by the mold clamping cylinder, the upper mold 2b is moved upward, and the upper mold 23 and the lower mold 21 are separated from each other to be in a mold open state.
The lower mold 2a may be a movable mold and the upper mold 2b may be a fixed mold.
　射出装置３は、射出ノズル３０を有する射出シリンダ３１と、機体１ａに取り付けた一対の昇降用シリンダ３２を備え、その一対の昇降用シリンダ３２で昇降するプレート３３に射出シリンダ３１を取り付け、昇降用シリンダ３２で射出シリンダ３１を昇降することで射出ノズル３０が待機位置と射出位置とに渡って昇降するようにしてある。
　また、射出シリンダ３１の内部には射出ノズル３０から溶融樹脂を金型２に射出するスクリューが設けられている。射出シリンダ３１の内部にあるスクリューは、不図示の回転駆動手段により回転し、不図示の往復動手段により射出シリンダ３１の内部を往復する。
　図１においては、機体１ａを二点鎖線で輪郭のみを図示してあり、金型２、射出装置３の具体的な取付け構造は図示を省略してある。 The injection device 3 includes an injection cylinder 31 having an injection nozzle 30 and a pair of elevating cylinders 32 attached to the airframe 1a. The injection cylinder 31 is attached to a plate 33 that is moved up and down by the pair of elevating cylinders 32. The injection nozzle 30 is moved up and down between the standby position and the injection position by moving the injection cylinder 31 up and down by the cylinder 32.
A screw that injects molten resin from the injection nozzle 30 into the mold 2 is provided inside the injection cylinder 31. The screw inside the injection cylinder 31 is rotated by a rotation drive means (not shown) and reciprocates inside the injection cylinder 31 by a reciprocation means (not shown).
In FIG. 1, only the outline of the airframe 1a is shown by a two-dot chain line, and the specific mounting structure of the mold 2 and the injection device 3 is not shown.
　可動プレート２２は射出シリンダ３１が挿通する上下方向に向かう孔２５を有している。
　上型２３は、孔２５と連続し射出ノズル３０の先端部が嵌まり合う凹部２６と、この凹部２６と連続したスプルー２７を有し、スプルー２７は金型２の成形用空間２ｄに連通している。
　つまり、上部金型２ｂは、上面に開口し射出シリンダ３１が挿通される孔２５と、この孔２５を成形用空間２ｄに連通するスプルー２７を有している。 The movable plate 22 has a hole 25 extending in the vertical direction through which the injection cylinder 31 is inserted.
The upper mold 23 has a recess 26 that is continuous with the hole 25 and fits the tip of the injection nozzle 30, and a sprue 27 that is continuous with the recess 26. The sprue 27 communicates with the molding space 2 d of the mold 2. ing.
That is, the upper mold 2b has a hole 25 that opens on the upper surface and through which the injection cylinder 31 is inserted, and a sprue 27 that communicates the hole 25 with the molding space 2d.
　射出装置３は、射出シリンダ３１が上昇して射出ノズル３０が待機位置のときには射出ノズル３０がスプルー２７と離れ、図１に示すように型閉じ状態の可動プレート２２の孔２５の上部に挿通されて、その可動プレート２２の孔２５と射出ノズル３０の先端部分との間にリング状の空隙Ｓを有している。
　射出ノズル３０が金型２のスプルー２７と離れた待機位置の状態で射出ノズル３０から溶融樹脂を排出する空射出動作を行う。
　射出ノズル３０が空射出動作をするときには、金型２の凹部２６と、その凹部２６と連続したスプルー２７と、金型２の成形用空間２ｄに射出ノズル３０から排出された溶融樹脂が入らない。射出シリンダ３１の内部のスクリューが回転したりスクリューが移動して射出ノズル３０から排出される樹脂が空射出樹脂ｄである。 In the injection device 3, when the injection cylinder 31 is raised and the injection nozzle 30 is in the standby position, the injection nozzle 30 is separated from the sprue 27 and is inserted into the upper part of the hole 25 of the movable plate 22 in the mold closed state as shown in FIG. Thus, a ring-shaped gap S is provided between the hole 25 of the movable plate 22 and the tip portion of the injection nozzle 30.
An empty injection operation for discharging the molten resin from the injection nozzle 30 is performed in a state where the injection nozzle 30 is in a standby position away from the sprue 27 of the mold 2.
When the injection nozzle 30 performs the idle injection operation, the molten resin discharged from the injection nozzle 30 does not enter the concave portion 26 of the mold 2, the sprue 27 continuous with the concave portion 26, and the molding space 2 d of the mold 2. . The resin discharged from the injection nozzle 30 when the screw inside the injection cylinder 31 rotates or the screw moves is the empty injection resin d.
　射出シリンダ３１を下降して射出シリンダ３１の先端部が孔２５に挿通されると共に、射出ノズル３０の先端部が凹部２６に嵌合して射出位置となる。
　この状態で射出ノズル３０から溶融樹脂を射出して、スプルー２７から金型２の成形用空間２ｄに溶融樹脂を充填して射出成形動作を行う。 The injection cylinder 31 is lowered and the tip of the injection cylinder 31 is inserted into the hole 25, and the tip of the injection nozzle 30 is fitted into the recess 26 to become an injection position.
In this state, the molten resin is injected from the injection nozzle 30, and the injection resin is filled from the sprue 27 into the molding space 2d of the mold 2 with the molten resin.
　樹脂回収装置４は、射出ノズル３０から排出される樹脂、つまり空射出樹脂ｄを吸収する樹脂吸引部４ａと、樹脂吸引部４ａが空射出樹脂ｄを吸引し易くする空気流れ形成部４ｂと、樹脂吸引部４ａが吸引した空射出樹脂ｄをホッパーなどの回収部まで移送する移送部４ｃとを備えている。
　樹脂吸引部４ａの先端部は待機位置にある射出ノズル３０の下方に位置する。樹脂吸引部４ａは、先端部から空気を吸い込み、基端部に向けて空気を流通させ、その空気の流れによって空射出樹脂を先端部から吸引して基端部に向けて搬送する。
　空気流れ形成部４ｂは、樹脂吸引部４ａの先端部に向かう空気流れを形成し、その空気流れで空射出樹脂の流れ方向を、樹脂吸引部４ａの先端部に向かう流れとし、吸引し易くする。
　移送部４ｃは、樹脂吸引部４ａの基端部と連続し、搬送された空射出樹脂をホッパーなどの回収部まで移送する。 The resin recovery device 4 includes a resin suction part 4a that absorbs the resin discharged from the injection nozzle 30, that is, the empty injection resin d, an air flow forming part 4b that makes the resin suction part 4a easily suck the empty injection resin d, And a transfer unit 4c that transfers the empty injection resin d sucked by the resin suction unit 4a to a collection unit such as a hopper.
The tip of the resin suction part 4a is located below the injection nozzle 30 at the standby position. The resin suction part 4a sucks air from the front end part, circulates air toward the base end part, sucks the empty injection resin from the front end part by the air flow, and conveys it toward the base end part.
The air flow forming portion 4b forms an air flow toward the tip of the resin suction portion 4a, and the flow direction of the empty injection resin is made to flow toward the tip of the resin suction portion 4a by the air flow to facilitate suction. .
The transfer part 4c is continuous with the base end part of the resin suction part 4a, and transfers the transported empty injection resin to a recovery part such as a hopper.
　樹脂吸引部４ａの先端部４ａ－１は待機位置にある射出ノズル３０の下方に位置しているので、射出ノズル３０を射出位置まで下降する際に樹脂吸引部４ａと接触する可能性があり邪魔になることがある。
　この場合には、樹脂吸引部４ａの先端部４ａ－１は、前述した待機位置にある射出ノズル３０の下方で射出ノズル３０から排出された樹脂を回収する回収位置と、射出ノズル３０が射出位置まで下降する際に射出ノズル３０と衝突せずに射出ノズル３０と離れた退避位置とに渡って移動するようにする。
　なお、射出ノズル３０を射出位置まで下降する際に干渉せず邪魔にならなければ、樹脂吸引部４ａの先端部４ａ－１は、前述の回収位置で待機し、退避位置に移動しなくとも良い。 Since the front end 4a-1 of the resin suction part 4a is located below the injection nozzle 30 at the standby position, there is a possibility that it may come into contact with the resin suction part 4a when the injection nozzle 30 is lowered to the injection position. May be.
In this case, the front end portion 4a-1 of the resin suction portion 4a includes a collection position for collecting the resin discharged from the injection nozzle 30 below the injection nozzle 30 at the standby position described above, and the injection nozzle 30 at the injection position. When it is lowered to the position, it does not collide with the injection nozzle 30 and moves over the retreat position away from the injection nozzle 30.
Note that the tip 4a-1 of the resin suction portion 4a does not have to interfere with the lowering of the injection nozzle 30 to the injection position, and does not have to move to the retracted position while waiting at the collection position. .
　樹脂吸引部４ａの先端部４ａ－１に取り付けられた空気流れ形成部４ｂは待機位置にある射出ノズル３０の下方に位置し、前述の待機位置にある射出ノズル３０の下方で樹脂吸引部４ａに向かう空気流れを形成して、樹脂吸引部４ａの先端部４ａ－１から空射出樹脂ｄを吸引し易くする吸引補助部材となっている。空気流れ形成部４ｂは、射出ノズル３０と離間した下方の位置で樹脂吸引部４ａに向かう空気流れを形成して樹脂吸引部４ａの先端部４ａ－１から排出された空射出樹脂ｄを吸引する吸引補助位置と、射出ノズル３０が射出位置まで下降する際に射出ノズル３０と衝突せずに射出ノズル３０と離れた退避位置とに渡って移動するようにする。
　なお、前述と同様に、空気流れ形成部４ｂは邪魔にならなければ吸引補助位置のままで、退避位置に移動しなくとも良い。 The air flow forming part 4b attached to the tip part 4a-1 of the resin suction part 4a is located below the injection nozzle 30 in the standby position, and is located below the injection nozzle 30 in the standby position to the resin suction part 4a. This is a suction auxiliary member that forms an air flow toward the front and makes it easy to suck the empty injection resin d from the front end portion 4a-1 of the resin suction portion 4a. The air flow forming part 4b forms an air flow toward the resin suction part 4a at a lower position away from the injection nozzle 30, and sucks the empty injection resin d discharged from the tip part 4a-1 of the resin suction part 4a. When the injection nozzle 30 is lowered to the injection position, the suction auxiliary position and the retreat position apart from the injection nozzle 30 are moved without colliding with the injection nozzle 30.
As described above, the air flow forming portion 4b does not need to move to the retracted position while remaining in the suction assisting position as long as it does not get in the way.
　このようにすることで、樹脂吸引部４ａは、樹脂吸引部４ａの先端部４ａ－１を射出ノズル３０の下方に接近させて射出ノズル３０から下方に排出される空射出樹脂ｄを吸引できる。
　また、樹脂吸引部４ａの下方への移動にともなって空気流れ形成部４ｂを射出ノズル３０の下方に接近させて射出ノズル３０から下方に排出される空射出樹脂ｄの排出方向を変化させて樹脂吸引部４ａの先端部４ａ－１に向けることができる。
　射出ノズル３０から下方に排出された空射出樹脂ｄの排出方向は、空気流れ形成部４ｂから樹脂吸引部４ａに向かって噴出された空気によって曲げられ変化する。 In this way, the resin suction part 4a can suck the empty injection resin d discharged downward from the injection nozzle 30 by bringing the tip part 4a-1 of the resin suction part 4a closer to the lower part of the injection nozzle 30.
Further, as the resin suction portion 4a moves downward, the air flow forming portion 4b is moved closer to the lower side of the injection nozzle 30 to change the discharge direction of the empty injection resin d discharged downward from the injection nozzle 30. It can be directed to the tip 4a-1 of the suction part 4a.
The discharge direction of the empty injection resin d discharged downward from the injection nozzle 30 is bent and changed by the air jetted from the air flow forming part 4b toward the resin suction part 4a.
　このように、本発明の樹脂回収装置４は、射出ノズル３０から排出された空射出樹脂ｄを空気の流れを利用して射出ノズル３０から直接に連続して吸引、搬送して回収するので、射出ノズル３０の下方の孔２５やスプルー２７に空射出樹脂ｄが溜まることがなく、射出ノズル３０の下方に空射出樹脂ｄを溜めるための上下方向のスペースや空射出樹脂ｄを溜めるための収容容器が不要であるから、射出シリンダ３１の昇降ストロークを短くできる。
　これにより、縦型の射出成形機の全高を低くして保守、点検等をやり易くできる。
　また、空射出樹脂ｄの量が多い場合でも、少ない場合でも同じようにして空射出樹脂ｄを回収することができる。 Thus, since the resin recovery apparatus 4 of the present invention sucks and conveys the empty injection resin d discharged from the injection nozzle 30 directly and continuously from the injection nozzle 30 using the flow of air, The empty injection resin d does not collect in the hole 25 or the sprue 27 below the injection nozzle 30, and the vertical space for storing the empty injection resin d below the injection nozzle 30 or the storage for storing the empty injection resin d. Since a container is unnecessary, the raising / lowering stroke of the injection cylinder 31 can be shortened.
As a result, the overall height of the vertical injection molding machine can be lowered to facilitate maintenance and inspection.
Further, the empty injection resin d can be recovered in the same way regardless of whether the amount of the empty injection resin d is large or small.
　図１に示す樹脂吸引部４ａは、基端側筒体４０と、この基端側筒体４０にスライド可能に嵌合した先端側筒体４１を有する。その基端側筒体４０を機体１ａに取り付けて固定し、先端側筒体４１の先端部４１ａが可動プレート２２の孔２５に向かう傾斜した縦向き姿勢としてある。先端側筒体４１の先端部４１ａが樹脂吸引部４ａの先端部４ａ－１である。
　基端側筒体４０に伸縮用シリンダ４３を取り付け、そのピストンロッド４３ａを先端側筒体４１に連結し、伸縮用シリンダ４３のピストンロッド４３ａを伸縮することで先端側筒体４１が伸縮するようにしてある。
　この先端側筒体４１の先端部４１ａには空気流れ形成部４ｂを取り付けてある。 The resin suction part 4a shown in FIG. 1 has a proximal end side cylinder 40 and a distal end side cylinder 41 that is slidably fitted to the proximal end side cylinder 40. The proximal end side cylinder 40 is attached and fixed to the machine body 1 a, and the distal end portion 41 a of the distal end side cylinder 41 is in an inclined vertical posture toward the hole 25 of the movable plate 22. The distal end portion 41a of the distal end side cylinder 41 is the distal end portion 4a-1 of the resin suction portion 4a.
A telescopic cylinder 43 is attached to the base end side cylinder 40, its piston rod 43a is connected to the front end side cylinder 41, and the front end side cylinder 41 is expanded and contracted by expanding and contracting the piston rod 43a of the expansion cylinder 43. It is.
An air flow forming portion 4 b is attached to the distal end portion 41 a of the distal end side cylinder 41.
　そして、先端側筒体４１を伸長することで、その先端部４１ａが可動プレート２２の孔２５と待機位置にある射出ノズル３０の間のリング状の空隙Ｓに挿入されて空射出樹脂ｄを回収する回収位置となると共に、空気流れ形成部４ｂが待機位置にある射出ノズル３０の下方に位置して空隙Ｓに挿入された吸引補助位置となる。
　先端側筒体４１を縮めることで、その先端部４１ａ及び空気流れ形成部４ｂがリング状の空隙Ｓから抜け出し、図１に二点鎖線で示す退避位置にそれぞれ移動する。 Then, by extending the distal end side cylinder 41, the distal end portion 41a is inserted into the ring-shaped gap S between the hole 25 of the movable plate 22 and the injection nozzle 30 at the standby position, and the empty injection resin d is recovered. And a suction assist position where the air flow forming part 4b is inserted below the injection nozzle 30 at the standby position and inserted into the gap S.
By contracting the distal end side cylinder body 41, the distal end portion 41a and the air flow forming portion 4b come out of the ring-shaped gap S and move to the retracted positions indicated by the two-dot chain lines in FIG.
　このように先端側筒体４１を伸縮させて回収位置と退避位置とに移動することで、空気流れ形成部４ｂが吸引補助位置と退避位置とに移動する。空気流れ形成部４ｂは伸縮用シリンダ４３によって先端側筒体４１と共に移動するため、空気流れ形成部４ｂを移動する機構を別途に設けることが不要である。
　なお、空気流れ形成部４ｂを先端側筒体４１に取り付けずに、単独で移動する機構を設けても良い。 As described above, the distal end side cylinder 41 is expanded and contracted to move to the collection position and the retracted position, whereby the air flow forming portion 4b moves to the suction assist position and the retracted position. Since the air flow forming portion 4b moves together with the distal end side cylinder 41 by the expansion / contraction cylinder 43, it is not necessary to separately provide a mechanism for moving the air flow forming portion 4b.
In addition, you may provide the mechanism which moves independently, without attaching the air flow formation part 4b to the front end side cylinder 41. FIG.
　先端側筒体４１を傾斜した縦向き姿勢としてことで、空射出樹脂ｄは先端側筒体４１に沿って上方に搬送される。
　移送部４ｃは下向きのシュート４４で、そのシュート４４の上部と基端側筒体４０の基端部が連結容器４５で接続されている。これにより先端側筒体４１の先端部４１ａから吸引した空射出樹脂ｄは基端側筒体４０に沿ってシュート４４の上部まで搬送される。
　そして、シュート４４に沿って下方に移送されることで、空射出樹脂ｄは図示しない空射出樹脂ｄの回収部に回収される。 By setting the front end side cylinder 41 to the inclined vertical orientation, the empty injection resin d is conveyed upward along the front end side cylinder 41.
The transfer part 4 c is a downward chute 44, and the upper part of the chute 44 and the base end part of the base end side cylinder 40 are connected by a connecting container 45. Accordingly, the empty injection resin d sucked from the distal end portion 41 a of the distal end side cylinder 41 is conveyed along the proximal end side cylinder 40 to the upper portion of the chute 44.
Then, by being transported downward along the chute 44, the empty injection resin d is recovered by a recovery unit for the empty injection resin d (not shown).
　次に、射出ノズル３０から排出された空射出樹脂ｄを吸引搬送する動作を説明する。
　図２及び図３に示すように、先端側筒体４１の先端部４１ａは、待機位置にある射出ノズル３０の下方で、可動プレート２２の孔２５と射出ノズル３０との間のリング状の空隙Ｓに位置し、先端部４１ａに開口した先端開口４１ｂから空気を矢印ａで示すように吸い込み、吸い込んだ空気が先端側筒体４１の内側を基端側筒体４０に向けて流れる。 Next, an operation for sucking and conveying the empty injection resin d discharged from the injection nozzle 30 will be described.
As shown in FIGS. 2 and 3, the distal end portion 41 a of the distal end side cylinder 41 is below the injection nozzle 30 in the standby position, and is a ring-shaped gap between the hole 25 of the movable plate 22 and the injection nozzle 30. The air is sucked from the tip opening 41b located at S and opened to the tip portion 41a as shown by the arrow a, and the sucked air flows toward the base side barrel 40 inside the tip side barrel 41.
　先端側筒体４１の先端開口４１ｂから空気を吸い込み、基端側筒体４０に向けて空気が流れるようにするには、先端側筒体４１の内側、又は基端側筒体４０の内側を負圧とすれば良い。
　基端側筒体４０内を負圧とする負圧発生手段としては、基端側筒体４０内に外部から空気を送り、その空気が基端側筒体４０の上方（基端部）に向けて流れるようにする。
　図２に示す負圧発生手段５０は、基端側筒体４０内に、環状凹部５１と基端側に向かう噴出孔５２を有した筒状のバルブ５３を設け、基端側筒体４０の孔４０ａに図示しない空気圧送用のホースを接続し、環状凹部５１に空気を送り、その空気が噴出孔５２から矢印ｂで示すように基端側に向けて流れるようにする。 In order to suck air from the distal end opening 41b of the distal end side cylinder 41 and allow the air to flow toward the proximal end side cylinder 40, the inner side of the distal end side cylinder 41 or the inner side of the proximal end side cylinder 40 is arranged. Negative pressure may be used.
As the negative pressure generating means for making the inside of the base end side cylinder 40 negative, air is sent from the outside into the base end side cylinder 40, and the air is above the base end side cylinder 40 (base end part). Make it flow toward.
The negative pressure generating means 50 shown in FIG. 2 is provided with a cylindrical valve 53 having an annular recess 51 and an ejection hole 52 toward the proximal end side in the proximal end side cylinder body 40. A pneumatic hose (not shown) is connected to the hole 40a, and air is sent to the annular recess 51 so that the air flows from the ejection hole 52 toward the base end side as indicated by an arrow b.
　このような負圧発生手段５０であれば、先端側筒体４１から基端側筒体４０に流れる空気を大気に放出することができるので、その空気の流れとともに搬送される空射出樹脂ｄを、前述したシュート４４に直接排出することができる。
　つまり、負圧発生手段は真空ポンプとしても良いが、真空ポンプとした場合には空気の流れとともに搬送される空射出樹脂ｄが真空ポンプの吸込口まで達するので、シュート４４に排出しづらくなる。空気を基端側筒体４０内や先端側筒体４１内に噴出して前述のように基端側筒体４０の内側を負圧にすれば先端側筒体４１から基端側筒体４０を通してシュート４４に空射出樹脂ｄを排出することができる。 With such a negative pressure generating means 50, the air flowing from the distal end side cylinder 41 to the proximal end side cylinder 40 can be discharged to the atmosphere. , It can be discharged directly to the chute 44 described above.
In other words, the negative pressure generating means may be a vacuum pump. However, when the vacuum pump is used, the empty injection resin d conveyed along with the air flow reaches the suction port of the vacuum pump, so that it is difficult to discharge to the chute 44. If air is blown into the proximal end side cylinder body 40 or the distal end side cylinder body 41 and the inner side of the proximal end side cylinder body 40 is set to a negative pressure as described above, the distal end side cylinder body 41 is changed to the proximal end side cylinder body 40. The empty injection resin d can be discharged to the chute 44 through.
　空気流れ形成部４ｂは、ブラケット６０と、このブラケット６０に取り付けた空気噴出部６１を備えている。
　ブラケット６０は底面板６２と、この底面板６２の幅方向両端に設けた一対の側面板６３，６３とで上向きのコ字形状で、その一対の側面板６３を先端側筒体４１の先端部４１ａの外周面にボルト等で固定することで、ブラケット６０を先端側筒体４１の先端部４１ａに取り付けてある。
　空気噴出部６１は先端側筒体４１と離れた底面板６２にパイプ６４を取り付け、そのパイプ６４に図示しない空気圧送ホースを接続してある。
　そのパイプ６４は先端側筒体４１に向かう噴出孔６４ａを有し、矢印ｃで示すように噴出孔６４ａから先端部筒体４１に向けて空気を噴出し、底面板６２及び一対の側面板６３，６３を有するブラケット６０とブラケット６０に取り付けられたパイプ６４の噴出孔６４ａによって先端側筒体４１の先端部４１ａに向かう空気流れを形成する。
　また、ブラケット６０によって射出ノズル３０から排出された溶融樹脂が、金型２の凹部２６と、その凹部２６と連続したスプルー２７と、金型２の成形用空間２ｄに入らないようになっている。 The air flow forming part 4 b includes a bracket 60 and an air ejection part 61 attached to the bracket 60.
The bracket 60 has an upward U-shape formed by a bottom plate 62 and a pair of side plates 63, 63 provided at both ends in the width direction of the bottom plate 62, and the pair of side plates 63 is connected to the tip of the distal end side cylinder 41. The bracket 60 is attached to the distal end portion 41a of the distal end side cylinder 41 by being fixed to the outer peripheral surface of 41a with a bolt or the like.
In the air ejection part 61, a pipe 64 is attached to a bottom plate 62 separated from the front end side cylinder 41, and a pneumatic feed hose (not shown) is connected to the pipe 64.
The pipe 64 has an ejection hole 64a toward the distal end side cylinder 41, and as shown by an arrow c, air is ejected from the ejection hole 64a toward the distal end cylinder 41, and a bottom plate 62 and a pair of side plates 63 are provided. , 63 and an ejection hole 64a of a pipe 64 attached to the bracket 60 form an air flow toward the distal end portion 41a of the distal end side cylinder 41.
Further, the molten resin discharged from the injection nozzle 30 by the bracket 60 is prevented from entering the recess 26 of the mold 2, the sprue 27 continuous with the recess 26, and the molding space 2 d of the mold 2. .
　先端側筒体４１の先端部４１ａとブラケット６０の空気噴出部６１は、昇降する射出ノズル３０の射出口３０ａの軸線である射出中心線Ａを境として当該射出中心線Ａを直交する方向で、その両側方に位置している。
　図２では射出中心線Ａは上下方向に向かい、射出中心線Ａと直行する左右方向の左側に先端側筒体４１の先端部４１ａが位置し、右側に空気噴出部６１が位置している。
　つまり、射出シリンダ３１を空射出動作して射出ノズル３０の射出口３０ａから空射出された空射出樹脂ｄは、先端側筒体４１の先端部４１ａと空気噴出部６１との間に向けて射出される。 The distal end portion 41a of the distal end side cylinder 41 and the air ejection portion 61 of the bracket 60 are orthogonal to the injection center line A, which is the axis of the injection port 30a of the injection nozzle 30 that moves up and down. Located on both sides.
In FIG. 2, the injection center line A is directed in the vertical direction, the distal end portion 41a of the distal end side cylinder 41 is located on the left side in the left-right direction perpendicular to the injection center line A, and the air ejection portion 61 is located on the right side.
In other words, the idle injection resin d that is idly injected from the injection port 30 a of the injection nozzle 30 by performing the idle injection operation of the injection cylinder 31 is injected toward the space between the tip end portion 41 a of the tip end side cylinder 41 and the air ejection portion 61. Is done.
　このようであるから、空射出動作開始時に射出ノズル３０の射出口３０ａから最初に空射出された空射出樹脂ｄは、先端側筒体４１の先端開口４１ｂから吸い込まれる矢印ａで示す空気流れ、及び空気噴出部６１から噴出される矢印ｃで示す空気流れにより先端側筒体４１の先端開口４１ｂに向けて曲がり、その先端開口４１ｂ内に流入し吸引される。
　この後は、空気の流れによって空射出樹脂ｄは先端側筒体４１及び基端側筒体４０内に順次搬送され、基端側筒体４０から基端側筒体４０とシュート４４を接続した連結容器４５を通ってシュート４４に排出される。 Since it is like this, the empty injection resin d initially discharged from the injection port 30a of the injection nozzle 30 at the start of the empty injection operation is the air flow indicated by the arrow a sucked from the tip opening 41b of the tip side cylinder 41, Then, the air flow shown by the arrow c ejected from the air ejection part 61 bends toward the distal end opening 41b of the distal end side cylinder 41 and flows into and sucked into the distal end opening 41b.
Thereafter, the empty injection resin d is sequentially conveyed into the distal end side cylinder 41 and the proximal end side cylinder 40 by the flow of air, and the proximal end side cylinder 40 and the chute 44 are connected from the proximal end side cylinder 40. It is discharged to the chute 44 through the connecting container 45.
　このように、最初に空射出された空射出樹脂ｄを先端側筒体４１内に直接吸引し、その後に空射出された空射出樹脂ｄを順次連続して吸引搬送するので、空射出樹脂ｄを、射出ノズル３０の噴出口３０ａから空射出された細い径のままで連続した細長い紐状として回収することができ、空射出樹脂ｄが落下して孔２５やスプルー２７に固まって付着することを防ぎ回収した空射出樹脂ｄの後処理が容易である。 In this way, since the empty injection resin d firstly injected is directly sucked into the distal end side cylinder 41, and thereafter, the empty injection resin d that has been injected empty is sequentially sucked and conveyed, the empty injection resin d. Can be recovered in the form of a continuous long and narrow string with a small diameter ejected from the ejection port 30a of the injection nozzle 30, and the empty ejection resin d falls and solidifies and adheres to the hole 25 and the sprue 27. This makes it easy to post-process the recovered empty injection resin d.
　図２に示すように、待機位置の射出ノズル３０は可動プレート２２の孔２５の上部に挿通されて、その射出ノズル３０と孔２５との間のリング状の空隙Ｓに先端側筒体４１の先端部４１ａ及びブラケット６０が挿入されるので、射出ノズル３０と可動プレート（上部金型２ｂ）との間に形成される上下方向のスペースを縮小して、射出シリンダ３１の昇降ストロークをより短くできる。 As shown in FIG. 2, the injection nozzle 30 at the standby position is inserted into the upper portion of the hole 25 of the movable plate 22, and the tip-side cylinder 41 is inserted into the ring-shaped gap S between the injection nozzle 30 and the hole 25. Since the distal end portion 41a and the bracket 60 are inserted, the vertical space formed between the injection nozzle 30 and the movable plate (upper mold 2b) can be reduced, and the vertical stroke of the injection cylinder 31 can be shortened. .
　また、可動プレート２２の孔２５を、上部が大径で下部に向かうにつれて順次小径となる漏斗形状とすることによって、前述のリング状の空隙Ｓに先端側筒体４１の先端部４１ａとブラケット６０が挿入し易くしてある。
　リング状の空隙Ｓは円形の環状形状に限らず、四角形等の角形形状やその他の形状でもよい。リング状の空隙Ｓには、射出ノズル３０及び先端側筒体４１の先端部４１ａが挿入できるスペースがある。 Further, the hole 25 of the movable plate 22 has a funnel shape in which the upper part has a large diameter and gradually decreases in diameter toward the lower part, so that the tip part 41a of the tip side cylinder 41 and the bracket 60 are formed in the ring-shaped gap S described above. Is easy to insert.
The ring-shaped gap S is not limited to a circular ring shape, but may be a square shape such as a quadrangle or other shapes. In the ring-shaped gap S, there is a space in which the injection nozzle 30 and the distal end portion 41a of the distal end side cylinder 41 can be inserted.
　空気流れ形成部４ｂは、射出ノズル３０の下方に位置して射出口３０ａと対向したブラケット６０を備えているので、誤動作などで空射出樹脂ｄが金型２の成形用空間２ｄ内に入り込むことを防止できる。
　ブラケット６０の一対の側面板６３の間隔は射出ノズル３０の径よりも広く、先端側筒体４１の伸縮によりブラケット６０を吸引補助位置と退避位置とに渡って移動するときに、ブラケット６０が待機位置の射出ノズル３０と干渉することがない。 Since the air flow forming portion 4b includes a bracket 60 that is positioned below the injection nozzle 30 and faces the injection port 30a, the empty injection resin d enters the molding space 2d of the mold 2 due to malfunction or the like. Can be prevented.
The distance between the pair of side plates 63 of the bracket 60 is wider than the diameter of the injection nozzle 30, and the bracket 60 waits when the bracket 60 is moved between the suction assist position and the retracted position due to the expansion and contraction of the distal end side cylinder 41. There is no interference with the injection nozzle 30 at the position.
　樹脂吸引部４ａの先端側筒体４１を伸縮することで、その先端部４１ａを回収位置と退避位置とに渡って移動するようにしたが、伸縮することがない一体の筒体とし、その筒体を移動することで、その先端部を回収位置と退避位置とに渡って移動するようにしても良い。
　空気流れ形成部４ｂのブラケット６０を先端側筒体４１の先端部４１ａに取り付け、先端側筒体４１とともに吸引補助位置と退避位置とに渡って移動するようにしたが、ブラケット６０をシリンダーや他の駆動手段によって単独で移動しても良い。
　なお、射出装置３と金型２は図１に示すような縦型の射出成形機に限られず、床に設置された射出成形機を横置きとして射出ノズルが床と平行に移動する、又は床面に対してわずかに射出ノズルを傾斜させて移動する横型の射出成形機でもよい。横型の射出成形機でも樹脂回収装置４、樹脂吸引部４ａ、空気流れ形成部４ｂを使用してもよい。 The distal end side cylinder 41 of the resin suction part 4a is expanded and contracted to move the distal end 41a across the collection position and the retracted position. You may make it move the front-end | tip part over a collection | recovery position and a retracted position by moving a body.
The bracket 60 of the air flow forming portion 4b is attached to the distal end portion 41a of the distal end side cylinder 41, and moved together with the distal end side cylinder 41 over the suction assist position and the retracted position. You may move independently by the drive means.
The injection device 3 and the mold 2 are not limited to the vertical injection molding machine as shown in FIG. 1, and the injection nozzle moves in parallel with the floor with the injection molding machine installed on the floor installed horizontally, or the floor It may be a horizontal injection molding machine that moves with the injection nozzle slightly inclined with respect to the surface. Even in a horizontal injection molding machine, the resin recovery device 4, the resin suction part 4a, and the air flow forming part 4b may be used.
　１…縦型の射出成形機、２…金型、２ａ…下部金型、２ｂ…上部金型、３…射出装置、４…樹脂回収装置、４ａ…樹脂吸引部、４ｂ…空気流れ形成部、２５…孔、２７…スプルー、３０…射出ノズル、３０ａ…射出口、３１…射出シリンダ、４０…基端側筒体、４１…先端側筒体、５０…負圧発生手段、６０…ブラケット、６１…空気噴出部、Ａ…射出中心線、Ｓ…空隙。 DESCRIPTION OF SYMBOLS 1 ... Vertical type injection molding machine, 2 ... Mold, 2a ... Lower mold, 2b ... Upper mold, 3 ... Injection device, 4 ... Resin recovery device, 4a ... Resin suction part, 4b ... Air flow formation part, 25 ... hole, 27 ... sprue, 30 ... injection nozzle, 30a ... injection port, 31 ... injection cylinder, 40 ... base end side cylinder, 41 ... tip end side cylinder, 50 ... negative pressure generating means, 60 ... bracket, 61 ... air ejection part, A ... injection center line, S ... gap.

Claims (7)

  1. 　金型（２）と、射出ノズル（３０）から金型（２）内に樹脂を射出する射出位置と、射出ノズル（３０）から樹脂を排出する待機位置とに渡って射出ノズル（３０）を移動する射出装置（３）と、射出ノズル（３０）から排出された樹脂（ｄ）を回収する樹脂回収装置（４）とを備えた射出成形機であって、
    　前記樹脂回収装置（４）は、射出ノズル（３０）から排出された樹脂（ｄ）を吸引する樹脂吸引部（４ａ）と、射出ノズル（３０）から排出された樹脂（ｄ）の排出方向を樹脂吸引部（４ａ）に向かう向きへ変化させる空気流れを形成する空気流れ形成部（４ｂ）を有していることを特徴とする射出成形機。     The injection nozzle (30) is extended over the mold (2), the injection position where the resin is injected from the injection nozzle (30) into the mold (2), and the standby position where the resin is discharged from the injection nozzle (30). An injection molding machine comprising a moving injection device (3) and a resin recovery device (4) for recovering the resin (d) discharged from the injection nozzle (30),
    The resin recovery device (4) includes a resin suction part (4a) for sucking the resin (d) discharged from the injection nozzle (30), and a discharge direction of the resin (d) discharged from the injection nozzle (30). An injection molding machine comprising an air flow forming part (4b) that forms an air flow that changes in a direction toward the resin suction part (4a).
  2. 　前記空気流れ形成部（４ｂ）は、樹脂吸引部（４ａ）に向けて空気を噴出する空気噴出部を有する請求項１記載の射出成形機。 The injection molding machine according to claim 1, wherein the air flow forming part (4b) has an air ejection part for ejecting air toward the resin suction part (4a).
  3. 　前記樹脂吸引部（４ａ）は、待機位置にある射出ノズル（３０）の下方で樹脂（ｄ）を回収する回収位置と、射出ノズル（３０）が金型（２）内に樹脂を射出する射出位置へ移動する時に射出ノズル（３０）と干渉しない退避位置とに渡って移動自在である請求項１又は２記載の射出成形機。 The resin suction part (4a) has a recovery position for recovering the resin (d) below the injection nozzle (30) in the standby position, and an injection in which the injection nozzle (30) injects the resin into the mold (2). The injection molding machine according to claim 1 or 2, wherein the injection molding machine is movable over a retreat position where it does not interfere with the injection nozzle (30) when moving to a position.
  4. 　金型（２）は可動金型（２ｂ）と固定金型（２ａ）を備え、可動金型（２ｂ）は、スプルー（２７）に連通し開口した孔（２５）を有し、この孔（２５）に射出ノズル（３０）が挿入されて射出ノズル（３０）と孔（２５）との間にリング状の空隙（Ｓ）を形成し、
    　前記樹脂吸引部（４ａ）は、前記空隙（Ｓ）に挿入されて樹脂（ｄ）を回収する回収位置と空隙（Ｓ）から抜け出た退避位置とに亘って移動するようにした請求項３記載の射出成形機。     The mold (2) includes a movable mold (2b) and a fixed mold (2a). The movable mold (2b) has a hole (25) opened to communicate with the sprue (27). 25) the injection nozzle (30) is inserted to form a ring-shaped gap (S) between the injection nozzle (30) and the hole (25),
    The said resin suction part (4a) is made to move over the collection | recovery position inserted in the said space | gap (S), and collect | recovering resin (d), and the retracted position which escaped from the space | gap (S). Injection molding machine.
  5. 　前記空気流れ形成部（４ｂ）は、樹脂吸引部（４ａ）に向かう空気流れを形成して樹脂（ｄ）を吸引する吸引補助位置と、射出ノズル（３０）が射出位置へ下降する際に射出ノズル（３０）と干渉しない退避位置とに渡って移動自在である請求項４記載の射出成形機。 The air flow forming part (4b) forms an air flow toward the resin suction part (4a) and sucks the resin (d), and an injection when the injection nozzle (30) descends to the injection position. The injection molding machine according to claim 4, wherein the injection molding machine is movable over a retreat position where it does not interfere with the nozzle (30).
  6. 　前記空気流れ形成部（４ｂ）を樹脂吸引部（４ａ）に取り付け、前記空気流れ形成部（４ｂ）は樹脂吸引部（４ａ）とともに吸引補助位置と退避位置とに渡って移動するようにした請求項５記載の縦型射出成形機。 The said air flow formation part (4b) is attached to the resin suction part (4a), and the said air flow formation part (4b) moved over the suction assistance position and the retreat position with the resin suction part (4a). Item 6. The vertical injection molding machine according to Item 5.
  7. 　前記空気流れ形成部（４ｂ）は、ブラケット（６０）と、このブラケット（６０）に取り付けた空気噴出部（６１）を備え、
    　前記空気流れ形成部（４ｂ）が前記吸引補助位置にあるときにブラケット（６０）が射出ノズル（３０）の射出口（３０ａ）と対向し、空気噴出部（６１）から噴出した空気によって樹脂（ｄ）を樹脂吸引部（４ａ）に向かうようにした請求項５又は６記載の射出成形機。     The air flow forming part (4b) includes a bracket (60) and an air ejection part (61) attached to the bracket (60).
    The bracket (60) faces the injection port (30a) of the injection nozzle (30) when the air flow forming portion (4b) is in the suction assist position, and the resin ( The injection molding machine according to claim 5 or 6, wherein d) is directed toward the resin suction part (4a).
PCT/JP2014/059480 2014-03-31 2014-03-31 Injection molding machine WO2015151166A1 (en)

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