WO2024161475A1 - 射出成形機 - Google Patents

射出成形機 Download PDF

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Publication number
WO2024161475A1
WO2024161475A1 PCT/JP2023/002923 JP2023002923W WO2024161475A1 WO 2024161475 A1 WO2024161475 A1 WO 2024161475A1 JP 2023002923 W JP2023002923 W JP 2023002923W WO 2024161475 A1 WO2024161475 A1 WO 2024161475A1
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WO
WIPO (PCT)
Prior art keywords
connecting member
fixed platen
platen
injection unit
fixed
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2023/002923
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕明 桐畑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
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.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Priority to CN202380091937.1A priority Critical patent/CN120513162A/zh
Priority to JP2024574087A priority patent/JPWO2024161475A1/ja
Priority to DE112023004542.9T priority patent/DE112023004542T5/de
Priority to PCT/JP2023/002923 priority patent/WO2024161475A1/ja
Priority to TW113101982A priority patent/TW202438285A/zh
Publication of WO2024161475A1 publication Critical patent/WO2024161475A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C45/1777—Nozzle touch mechanism
    • 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
    • B29C45/1761—Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames

Definitions

  • This disclosure relates to an injection molding machine equipped with a nozzle touch mechanism.
  • the injection unit moves in a direction approaching the mold. This allows the tip of the nozzle of the injection unit to come into contact with the mold.
  • the motor is rotated while the tip of the nozzle is in contact with the mold, the tip of the nozzle is pressed against the mold. This allows the nozzle touch force described above to be generated.
  • a pulling force is generated in the ball screw shaft of the nozzle touch mechanism in the opposite direction to the nozzle touch force. In this way, the nozzle touch force acts on the fixed platen on which the mold is mounted at the center in the vertical direction, and the pulling force acts on the lower end. As a result, the fixed platen falls toward the mold.
  • the connecting member is fixed to the surface of the fixed platen facing the injection unit.
  • a rotational force that tries to rotate the lower end of the connecting member so as to lift it upward is applied to the connecting member. This generates a force that presses down on the attachment part between the fixed platen and the connecting member, and there is a risk of the fixed platen tipping over slightly towards the injection unit.
  • the connecting member is fixed to the surface of the fixed platen facing the injection unit. Therefore, the connecting member protrudes from the fixed platen towards the injection unit.
  • the injection unit When rotating the injection unit to clean the inside of the cylinder, it is necessary to move the injection unit in a direction away from the mold to a non-interference position where the injection unit does not interfere with the protruding part of the connecting member. Therefore, the injection molding machine needs to have a stroke to move to the non-interference position mentioned above. This leads to increased costs and an increase in the overall length of the injection molding machine.
  • the injection molding machine of the present disclosure includes, on a machine base, a fixed platen on which a fixed mold is provided, an injection unit that is movable in a direction approaching or moving away from the fixed mold and has a nozzle capable of injecting molten material, a nozzle touch mechanism that is disposed below the injection unit and that applies a driving force to the injection unit to move the injection unit in a direction approaching the fixed mold, thereby pressing the nozzle against the fixed mold, and a connecting member that has one end attached to the nozzle touch mechanism and the other end attached to the fixed platen and connects the nozzle touch mechanism to the fixed platen.
  • the fixed platen has an intersecting surface that intersects with the vertical direction of the fixed platen and the lateral direction perpendicular to the moving direction of the injection unit.
  • the other end of the connecting member is attached to the intersecting surface of the fixed platen so that, when the connecting member is pulled toward the injection unit, a rotational force that passes through the other end of the connecting member and the intersecting surface and that attempts to rotate around an axis along the lateral direction is applied to the connecting member.
  • FIG. 1 is a schematic right side view showing an injection molding machine according to a first embodiment of the present invention, with some parts omitted.
  • FIG. 1 is a schematic diagram showing an injection molding machine according to a first embodiment of the present invention, illustrating a stationary platen as viewed from behind.
  • FIG. 1 is a schematic perspective view showing an injection molding machine according to a first embodiment of the present invention, illustrating an attachment state of a fixed platen and a connecting member.
  • 1 is a schematic right side view showing an injection molding machine according to a first embodiment of the present invention, with a portion thereof being enlarged.
  • FIG. FIG. 11 is a schematic right side view showing an injection molding machine according to a second embodiment of the present invention, illustrating an attachment state of a fixed platen and a connecting member.
  • FIG. 1 is a schematic right side view showing an injection molding machine according to a first embodiment of the present invention, with some parts omitted.
  • FIG. 1 is a schematic diagram showing an injection molding machine according to a first embodiment
  • FIG. 11 is a schematic diagram showing an injection molding machine according to a second embodiment of the present invention, showing a stationary platen as viewed from behind.
  • FIG. 11 is a schematic perspective view showing an injection molding machine according to a second embodiment of the present invention, illustrating an attachment state of a fixed platen and a connecting member.
  • FIG. 11 is a schematic diagram showing a modified example of the injection molding machine of the present invention, showing the stationary platen as viewed from behind.
  • the injection molding machine 1 includes a fixed platen 3, an injection unit 4, a nozzle touch mechanism 5, and a connecting member 6 on a machine base 2.
  • the front-to-rear direction D1, the up-down direction D2, and the left-to-right direction D3 are defined as follows. Specifically, the direction from the injection unit 4 to the fixed platen 3 is defined as the front direction D11, and the opposite direction is defined as the rear direction D12, and these are collectively defined as the front-to-rear direction D1.
  • the upward direction D21 (the upward direction in FIG. 1) and the opposite downward direction D22 are collectively defined as the up-to-down direction D2.
  • the leftward direction D31 (the direction from the bottom left to the top right in FIG. 3) and the opposite rightward direction D32 are collectively defined as the left-to-right direction D3. Arrows indicating these directions are shown in some drawings.
  • the fixed platen 3 is a generally rectangular plate (block-shaped) when viewed from the front.
  • the fixed platen 3 is fixed on the machine base 2 with the plate surface facing forward and backward.
  • the fixed platen 3 has an insertion hole 7 penetrating in the forward and backward direction D1.
  • the insertion hole 7 is located in the center of the fixed platen 3.
  • the fixed platen 3 has mounting recesses 8 on both left and right sides to which the connecting member 6 described later is attached.
  • the mounting recess 8 formed on the left side of the fixed platen 3 has a concave shape recessed inwardly of the fixed platen 3 and opens in the rear direction D12.
  • the mounting recess 8 formed on the right side of the fixed platen 3 has a concave shape recessed inwardly of the fixed platen 3 and opens in the rear direction D12.
  • a fixed mold 9 is provided on the front of the fixed platen 3.
  • a movable platen (not shown) is arranged on the machine base 2 in front of the fixed platen 3. The movable platen can be moved in the forward and backward direction D1 by a drive mechanism (not shown).
  • a movable mold (not shown) is provided behind the movable platen.
  • the drive mechanism moves the movable platen in the rear direction D12, which is the direction in which the movable platen approaches the fixed platen 3.
  • To open the fixed mold 9 and the movable mold the drive mechanism moves the movable platen in the forward direction D11, which is the direction in which the movable platen moves away from the fixed platen 3.
  • the injection unit 4 is disposed rearward of the fixed platen 3.
  • the injection unit 4 has a base 10, a main body 11, a cylinder 12, and a nozzle 13.
  • the base 10 has a placement section 14 on which the main body 11 (described later) is placed, and an extension section 15 extending in the downward direction D22 from the placement section 14.
  • the main body 11 is rotatably mounted on the placement section 14.
  • the main body 11 is rotatably mounted on the upper side of the placement section 14 around a swivel pin (not shown) along the vertical direction D2.
  • a cylinder 12 is provided on the front side of the main body 11, extending from the main body 11 toward the fixed platen 3.
  • a nozzle 13 capable of injecting molten material is provided at the tip of the cylinder 12.
  • the injection unit 4 is movable in a direction approaching or moving away from the fixed mold 9. Therefore, in the illustrated example, the injection unit 4 is supported on the machine base 2 via a pair of linear guides 16, 16 spaced apart in the left-right direction D3.
  • the pair of linear guides 16, 16 can move the injection unit 4 linearly in the front-rear direction D1 relative to the machine base 2.
  • Each of the pair of linear guides 16, 16 has a guide rail 17 and a guide block 18.
  • the guide rail 17 is provided on the machine base 2 so as to extend in the front-rear direction D1.
  • the guide block 18 is movable on the guide rail 17 in the front-rear direction D1 while being fitted into the guide rail 17.
  • the guide block 18 is provided at the lower end of the injection unit 4.
  • the guide block 18 is provided at the lower end of the base portion 10. With this configuration, the injection unit 4 is movable in the front-rear direction D1 along the guide rail 17.
  • the number of guide blocks 18 provided on one guide rail 17 is two. Of the two guide blocks 18, 18, one guide block 18 is provided on the front side of the injection unit 4, and the other guide block 18 is provided on the rear side of the injection unit 4. Note that the number of guide blocks 18 provided on one guide rail 17 is not limited to this, and may be one, or three or more.
  • the nozzle touch mechanism 5 is disposed below the injection unit 4.
  • the nozzle touch mechanism 5 has a motor 19, a ball screw shaft 20, a ball screw nut 21, and a spring 22.
  • the motor 19 is provided on the machine base 2.
  • the motor 19 is disposed rearward of the injection unit 4.
  • the ball screw shaft 20 is rod-shaped, and has a screw formed on its outer circumferential surface.
  • the ball screw shaft 20 is provided on the machine base 2 so as to extend along the front-rear direction D1.
  • the rear end of the ball screw shaft 20 is connected to the rotor shaft of the motor 19 via a coupling 23.
  • the front end of the ball screw shaft 20 is attached to the connecting member 6 described later. At this time, the ball screw shaft 20 is rotatable around its own axis.
  • the ball screw nut 21 is nut-shaped, and is screwed onto the ball screw shaft 20.
  • the ball screw nut 21 is disposed rearward of the extension portion 15 of the injection unit 4.
  • the ball screw nut 21, which is disposed rearward of the extension portion 15, is attached to the extension portion 15 via a spring 22. At this time, the ball screw nut 21 cannot rotate relative to the extension portion 15. In this way, the ball screw nut 21 is provided in the injection unit 4 in a state where it is screwed onto the ball screw shaft 20 and cannot rotate relative to the injection unit 4.
  • the ball screw shaft 20 can be rotated around its own axis.
  • the ball screw nut 21 screwed onto the ball screw shaft 20 moves in the forward direction D11 along the ball screw shaft 20.
  • the injection unit 4 to which the ball screw nut 21 is attached moves in the forward direction D11.
  • the injection unit 4 moves in the forward direction D11 along the guide rail 17.
  • the motor 19 is rotated in a direction opposite to the above-mentioned predetermined direction
  • the ball screw nut 21 screwed onto the ball screw shaft 20 moves in the rearward direction D12 along the ball screw shaft 20. This allows the injection unit 4 to which the ball screw nut 21 is attached to move in the rearward direction D12.
  • the connecting member 6 is a member that connects the nozzle touch mechanism 5 and the fixed platen 3. One end of the connecting member 6 is attached to the nozzle touch mechanism 5, and the other end of the connecting member 6 is attached to the fixed platen 3.
  • the connecting member 6 is generally L-shaped in side view, and has a support base 24 and a pair of arms 25, 25.
  • the support base 24 is a generally rectangular plate in plan view.
  • the support base 24 is provided on the machine base 2 with the plate surface facing up and down.
  • the pair of arms 25, 25 are each rod-shaped.
  • the pair of arms 25, 25 are erected on the front side of the support base 24, which is the fixed platen 3 side. In the illustrated example, the pair of arms 25, 25 are fixed to the support base 24 by a bolt 26 or the like.
  • the pair of arms 25, 25 are arranged spaced apart in the left-right direction D3 on the support base 24.
  • Each of the pair of arms 25, 25 extends from the support base 24 in the upward direction D21, then extends diagonally upward toward the front side, and further extends in the forward direction D11. Therefore, the tip of the pair of arms 25, 25 faces the forward direction D11.
  • the support base 24 and the pair of arms 25, 25 are separate bodies, but are not limited to this and may be formed integrally.
  • the support base 24 of the connecting member 6 is attached to the front end of the ball screw shaft 20. At this time, the front end of the ball screw shaft 20 is supported by a bearing 27 provided on the support base 24. Therefore, the ball screw shaft 20 can rotate relative to the support base 24. In this way, one end of the connecting member 6 is attached to the nozzle touch mechanism 5.
  • the fixed platen 3 has an intersecting surface 28 that intersects with the vertical direction of the fixed platen 3 and the horizontal direction perpendicular to the moving direction of the injection unit 4.
  • the fixed platen 3 is plate-shaped and is provided on the machine base 2 with the plate surface facing forward and backward.
  • the vertical direction of the fixed platen 3 is the vertical direction D2 in each figure.
  • the moving direction of the injection unit 4 is the approach/separation direction in which the injection unit 4 approaches or moves away from the fixed mold 9, which is the front-rear direction D1 in each figure.
  • the horizontal direction is a direction perpendicular to the vertical direction D2 and the front-rear direction D1, and is therefore the left-right direction D3.
  • the surfaces that intersect with the left-right direction D3 are both the left and right side surfaces of the fixed platen 3.
  • the intersecting surfaces 28 of the fixed platen 3 are both the left and right side surfaces of the fixed platen 3.
  • Both left and right side surfaces of the stationary platen 3 are intersecting surfaces 28, so the stationary platen 3 has two intersecting surfaces 28, 28.
  • the left and right side surfaces of the stationary platen 3 are located at a distance from each other. Therefore, of the two intersecting surfaces 28, 28, one intersecting surface 28 is located at one end side in the lateral direction described above, and the other intersecting surface 28 is located at the other end side in the lateral direction described above.
  • the other end of the connecting member 6 is attached to the intersecting surface 28 of the fixed platen 3.
  • a pair of arms 25, 25 of the connecting member 6 are attached to the two intersecting surfaces 28, 28 of the fixed platen 3.
  • the arm 25 located on the left side is attached to the mounting recess 8 located on the left side of the fixed platen 3.
  • a bolt 29 is screwed into the fixed platen 3 via the tip of the arm 25, so that the left arm 25 is attached to the left side surface of the fixed platen 3.
  • the arm 25 located on the right side is attached to the mounting recess 8 located on the right side of the fixed platen 3.
  • a bolt 29 is screwed into the fixed platen 3 via the tip of the arm 25, so that the right arm 25 is attached to the right side surface of the fixed platen 3.
  • the connecting member 6 Since there is a pair of arms 25 attached to the fixed platen 3, the connecting member 6 has two other ends attached to the fixed platen 3. Since the pair of arms 25, 25 are spaced apart in the left-right direction D3, the connecting member 6 has a left arm 25 and a right arm 25 that are bifurcated at the front. Therefore, the connecting member 6 has two other ends that are bifurcated.
  • the left arm 25 is attached to the left side of the fixed platen 3, and the right arm 25 is attached to the right side of the fixed platen 3. Therefore, one other end of the connecting member 6 is attached to the intersecting surface 28 located at one end side in the horizontal direction, which is the left-right direction D3, and the other other end of the connecting member 6 is attached to the intersecting surface 28 located at the other end side in the horizontal direction.
  • the first mounting portion 30, which is the mounting portion between the left arm portion 25 and the left side surface which is the left intersecting surface 28 of the fixed platen 3, and the second mounting portion 31, which is the mounting portion between the right arm portion 25 and the right side surface which is the right intersecting surface 28 of the fixed platen 3, are positioned point-symmetrically with respect to an axis 32 which passes through the center of the fixed platen 3 and runs along the front-to-rear direction D1.
  • the first mounting portion 30 and the second mounting portion 31 are positioned in the center of the fixed platen 3 in the up-to-down direction D2.
  • the first mounting portion 30 is positioned in the center of the left intersecting surface 28 of the fixed platen 3 in the front-to-rear direction D1.
  • the second mounting portion 31 is positioned in the center of the right intersecting surface 28 of the fixed platen 3 in the front-to-rear direction D1.
  • the fixed platen 3 is supported on the machine base 2 by a pair of platen support members 33, 33.
  • Each of the pair of platen support members 33, 33 is columnar.
  • the pair of platen support members 33, 33 is erected on the machine base 2.
  • the pair of platen support members 33, 33 are fixed to the machine base 2 by bolts 34 or the like.
  • the left end of the fixed platen 3 is fixed to the platen support member 33 located on the left side of the pair of platen support members 33, 33.
  • a bolt 29 is screwed into the fixed platen 3 via the left platen support member 33 and the left arm portion 25, thereby fixing the fixed platen 3 to the left platen support member 33.
  • the right end of the fixed platen 3 is fixed to the platen support member 33 located on the right side of the pair of platen support members 33, 33.
  • the bolt 29 is screwed into the stationary platen 3 via the right platen support member 33 and the right arm 25, thereby fixing the stationary platen 3 to the right platen support member 33.
  • the stationary platen 3 is fixed onto the machine base 2 by the pair of platen support members 33, 33.
  • the bolt that attaches the arm 25 to the stationary platen 3 and the bolt that fixes the stationary platen 3 to the platen support member 33 are the same bolt 29.
  • the connecting member 6 is supported on the machine base 2 by a pair of linear guides 35, 35.
  • the pair of linear guides 35, 35 are arranged on the machine base 2, spaced apart from each other in the horizontal direction, which is the left-right direction D3.
  • the pair of linear guides 35, 35 can move the connecting member 6 linearly in the movement direction of the injection unit 4 relative to the machine base 2.
  • Each of the pair of linear guides 35, 35 has a guide rail 36 and one guide block 37.
  • the guide rail 36 is provided on the machine base 2 so as to extend in the front-rear direction D1.
  • the guide block 37 is movable on the guide rail 36 in the front-rear direction D1 while being fitted into the guide rail 36.
  • the guide block 37 is provided at the lower end of the connecting member 6.
  • the guide block 37 is provided at the lower end of the support base portion 24. Because of this configuration, the connecting member 6 can move in the front-back direction D1 along the guide rail 36. However, because the guide block 37 is fitted into the guide rail 36, the connecting member 6 cannot move in the up-down direction D2 or the left-right direction D3.
  • the operation of the injection molding machine 1 of this embodiment will be described.
  • the mold 38 consisting of the fixed mold 9 and the movable mold is clamped.
  • the movable mold is moved in a direction approaching the fixed mold 9.
  • an injection process is performed in which molten material is injected into the mold 38.
  • the nozzle touch mechanism 5 moves the injection unit 4 in a direction approaching the fixed mold 9.
  • the motor 19 is rotated in a predetermined direction to rotate the ball screw shaft 20 about its own axis, and the ball screw nut 21 is moved in the forward direction D11 along the ball screw shaft 20.
  • the injection unit 4 to which the ball screw nut 21 is attached moves in the forward direction D11 along the guide rail 17.
  • the nozzle 13 of the injection unit 4 comes into contact with the spool of the fixed mold 9 through the insertion hole 7 of the fixed platen 3.
  • the motor 19 is further rotated in a predetermined direction with the nozzle 13 in contact with the fixed mold 9, the spring 22 is compressed.
  • the injection unit 4 When the spring 22 is compressed, the injection unit 4 tries to move further in the forward direction D11 due to the compression reaction force of the spring 22. As a result, the nozzle 13 of the injection unit 4 is pressed against the spool of the fixed mold 9. In this way, the nozzle touch mechanism 5 applies a driving force to the injection unit 4 to move the injection unit 4 in a direction approaching the fixed mold 9, thereby pressing the nozzle 13 against the fixed mold 9. With the nozzle 13 of the injection unit 4 pressed against the fixed mold 9, molten resin or metal material is injected from the nozzle 13 of the injection unit 4 into the mold 38.
  • the attachment portion between the connecting member and the fixed platen is located on the surface of the fixed platen facing the injection unit. Therefore, as described above, when a rotational force is applied to the connecting member, a downward force is applied to the end of the fixed platen facing the injection unit, which may cause the fixed platen to tilt toward the injection unit.
  • the first attachment portion 30 is located at the left end of the fixed platen 3
  • the second attachment portion 31 is located at the right end of the fixed platen 3.
  • a force F2 is generated in the downward direction D22 so as to push down the first attachment portion 30 and the second attachment portion 31. Therefore, with the injection molding machine 1 of this embodiment, a force is less likely to be generated in a direction that tilts the fixed platen 3.
  • the first mounting portion 30 between the intersecting surface 28 located at one end side in the horizontal direction, which is the left-right direction D3, and one other end of the connecting member 6, and the second mounting portion 31 between the intersecting surface 28 located at the other end side in the horizontal direction and the other other end of the connecting member 6, are positioned point-symmetrically with respect to the axis 32 that passes through the center of the fixed platen 3 and is along the moving direction of the injection unit 4.
  • the first mounting portion 30 and the second mounting portion 31 are positioned at the center of the fixed platen 3 in the up-down direction D2.
  • the fixed platen 3 when the fixed platen 3 is thermally deformed due to heat generated in the mold 38 during the production of a molded product, the fixed platen 3 can be deformed symmetrically up and down. This makes it possible to maintain the precision of the molded product.
  • the attachment portion between the other end of the connecting member 6 and the intersecting surface 28 is located at the center of the intersecting surface 28 in the movement direction of the injection unit 4. Therefore, according to the injection molding machine 1 of this embodiment, it is possible to more reliably prevent the fixed platen 3 from falling in the front-rear direction D1.
  • an injection molding machine 1a according to a second embodiment of the present invention will be described with reference to Figures 5 to 7. Note that components having the same reference numerals as those in the first embodiment have the same functions, and therefore their description may be omitted below.
  • the injection molding machine 1a of the second embodiment differs from the first embodiment in the mounting structure between the connecting member 6 and the fixed platen 3.
  • a pair of protrusions 39, 39 are provided on the left side surface of the fixed platen 3, one above the other and one below the mounting recess 8.
  • the pair of protrusions 39, 39 protrude from the left side surface of the fixed platen 3 in the left direction D31.
  • the fixed platen 3 is attached to the left platen support member 33 via the pair of protrusions 39, 39.
  • the bolt 29 is screwed into the pair of protrusions 39, 39 on the left side via the left platen support member 33, thereby fixing the fixed platen 3 to the left platen support member 33.
  • a pair of protrusions 39, 39 are provided on the right side surface of the fixed platen 3, one above the other and one below the mounting recess 8.
  • the pair of protrusions 39, 39 protrude from the right side surface of the fixed platen 3 in the right direction D32.
  • the stationary platen 3 is attached to the right platen support member 33 via a pair of protrusions 39, 39.
  • the bolt 29 is screwed into the pair of protrusions 39, 39 on the right side via the right platen support member 33, thereby fixing the stationary platen 3 to the right platen support member 33.
  • a round bar-shaped shaft portion 40 is provided to bridge between the left platen support member 33 and the fixed platen 3.
  • the shaft portion 40 penetrates the tip of the left arm portion 25 housed in the left mounting recess 8.
  • a round bar-shaped shaft portion 40 is provided to bridge between the right platen support member 33 and the fixed platen 3.
  • the shaft portion 40 penetrates the tip of the right arm portion 25 housed in the right mounting recess 8.
  • the other end of the connecting member 6 is attached to the intersecting surface 28 via the shaft portion 40 along the horizontal direction, which is the left-right direction D3. This allows the connecting member 6 to rotate around the shaft portion 40.
  • the other end of the connecting member 6 is attached to the fixed platen 3 so as to be rotatable around the shaft 40 that runs along the horizontal direction, which is the left-right direction D3. Therefore, according to the injection molding machine 1a of the second embodiment, it is possible to deflect the rotational moment load when the connecting member 6 rotates around the shaft 40.
  • the other end of the connecting member 6 is attached to the intersecting surface 28 of the fixed platen 3 so that when the connecting member 6 is pulled towards the injection unit 4, a rotational force that passes through the other end of the connecting member 6 and the intersecting surface 28 and tries to rotate the connecting member 6 about an axis along the horizontal direction is applied to the connecting member 6. Therefore, it is possible to provide an injection molding machine that can reduce the overall length by suppressing the protrusion of the connecting member 6 and can more reliably prevent the fixed platen 3 from falling over.
  • the height of the first mounting portion 30 and the height of the second mounting portion 31 are substantially the same, but as shown in FIG. 8, they may be different.
  • the first mounting portion 30 and the second mounting portion 31 are positioned point-symmetrically with respect to the axis 32 of the fixed platen 3.
  • the injection molding machine (1) is provided on a machine base (2) with a fixed platen (3) on which a fixed mold (9) is provided, an injection unit (4) movable in a direction approaching or moving away from the fixed mold (9) and having a nozzle (13) capable of injecting a molten material, a nozzle touch mechanism (5) disposed below the injection unit (4) and pressing the nozzle (13) against the fixed mold (9) by applying a driving force to the injection unit (4) to move the injection unit (4) in a direction approaching the fixed mold (9), and a connecting member (6) having one end attached to the nozzle touch mechanism (5) and the other end attached to the fixed platen (3) and connecting the nozzle touch mechanism (5) and the fixed platen (3) on the machine base (2).
  • the fixed platen (3) has an intersecting surface (28) that intersects with a horizontal direction perpendicular to the vertical direction of the fixed platen (3) and the moving direction of the injection unit (4).
  • the other end of the connecting member (6) is attached to the intersecting surface (28) of the fixed platen (3) so that, when the connecting member (6) is pulled toward the injection unit (4), a rotational force that passes through the other end of the connecting member (6) and the intersecting surface (28) and attempts to rotate the connecting member (6) around an axis along the lateral direction is applied to the connecting member (6).
  • the connecting member (6) has two branched other end portions, one of the other end portions being attached to the intersecting surface (28) located at one end side in the horizontal direction, and the other other end portion being attached to the intersecting surface (28) located at the other end side in the horizontal direction. It is preferable that a first attachment portion (30) between the intersecting surface (28) located at one end side in the horizontal direction and one of the other end portions, and a second attachment portion (31) between the intersecting surface (28) located at the other end side in the horizontal direction and the other other end portion are located point-symmetrically with respect to an axis (32) that passes through the center of the fixed platen (3) and is aligned along the moving direction.
  • the injection molding machine (1) preferably includes a pair of linear guides (35, 35) that support the connecting member (6) and can move the connecting member (6) linearly in the moving direction relative to the machine base (2).
  • the pair of linear guides (35, 35) are preferably arranged spaced apart in the lateral direction.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
PCT/JP2023/002923 2023-01-30 2023-01-30 射出成形機 Ceased WO2024161475A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202380091937.1A CN120513162A (zh) 2023-01-30 2023-01-30 注射成型机
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PCT/JP2023/002923 WO2024161475A1 (ja) 2023-01-30 2023-01-30 射出成形機
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008238769A (ja) * 2007-03-29 2008-10-09 Niigata Machine Techno Co Ltd 射出成形機の型締装置
WO2021241464A1 (ja) * 2020-05-28 2021-12-02 ファナック株式会社 射出成形機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008238769A (ja) * 2007-03-29 2008-10-09 Niigata Machine Techno Co Ltd 射出成形機の型締装置
WO2021241464A1 (ja) * 2020-05-28 2021-12-02 ファナック株式会社 射出成形機

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TW202438285A (zh) 2024-10-01

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