Injection molding machine

Abstract

The present disclosure is an injection molding machine including a mold clamping unit that opens and closes a mold and an injection unit that injects a molding material. The injection molding machine is provided with: a convex part provided on one of the mold clamping unit and the injection unit; and a recess provided in the other of the mold clamping unit and the injection unit. The convex portion and the concave portion slide relative to each other in a direction along the injection direction of the molding material and are fitted to each other, and the mold clamping unit and the injection unit are positioned by the fitting.

Description

Technical Field

[0001] This disclosure relates to an injection molding machine. Background Technology

[0002] Japanese Patent Application Publication No. 2015-182363 discloses an injection molding machine having a frame structure that connects a mold-closing unit (mold-closing device) and an injection unit (injection device). Summary of the Invention

[0003] We expect better injection molding machines.

[0004] This disclosure discloses an injection molding machine comprising a mold closing unit for opening and closing a mold and an injection unit for injecting molding material. The machine is characterized by comprising: a protrusion disposed on one of the mold closing unit and the injection unit; and a recess disposed on the other of the mold closing unit and the injection unit. The protrusion and the recess slide relative to each other and engage in a direction along the injection direction of the molding material, thereby positioning the mold closing unit and the injection unit through this engagement. Attached Figure Description

[0005] Figure 1 This is a schematic diagram showing the structure of an injection molding machine.

[0006] Figure 2 This is a diagram showing the joint.

[0007] Figure 3 This diagram shows the joint surfaces of the first and second joint pieces facing each other.

[0008] Figure 4 It is a diagram showing the state of the convex and concave parts fitting together.

[0009] Figure 5 This is a diagram showing the mold-closing unit of modified example 1.

[0010] Figure 6 This is a diagram showing the injection unit of modified example 1.

[0011] Figure 7 This is a diagram showing the mold-closing unit of modified example 2.

[0012] Figure 8 This is a diagram showing the joint of variant example 3.

[0013] Figure 9 This is a diagram illustrating an example of a convex structure.

[0014] Figure 10 This is a diagram illustrating an example of a convex structure.

[0015] Figures 11A to 11HThis is a diagram illustrating an example of the shape of a convex part.

[0016] Figures 12A-12D This is a diagram showing an example of the shape of a concave section.

[0017] Figure 13A This is a diagram showing the joint of modified Example 6 before the relative positions were adjusted. Figure 13B This is a diagram showing the joint of modified Example 6 after the relative positions have been adjusted.

[0018] Figure 14 It is a diagram showing a joint with graduations.

[0019] Figure 15 This is a diagram showing an injection molding machine equipped with a second injection device. Detailed Implementation

[0020] The clamping unit and the injection unit are relatively heavy. Therefore, it is not always easy to fine-tune their relative positions by moving them relative to each other. The objective of this disclosure is to provide an injection molding machine that can effectively adjust the relative positions between the clamping unit and the injection unit.

[0021] [Implementation Method]

[0022] [Structure of an Injection Molding Machine]

[0023] Figure 1 This is a schematic diagram showing the structure of the injection molding machine 10. In this embodiment, the front-to-back direction D1, the left-to-right direction D2, and the up-down direction D3 are defined. The front-to-back direction D1 corresponds to the depth direction of the injection molding machine 10. The left-to-right direction D2 corresponds to the width direction of the injection molding machine 10. The up-down direction D3 corresponds to the height direction of the injection molding machine 10.

[0024] Additionally, one side of the forward / backward direction D1 is the forward direction D11, and the other side of the forward / backward direction D1 is the backward direction D12. Furthermore, one side of the left / right direction D2 is the left direction D21 (see reference). Figure 2 The other side of left-right direction D2 is right-right direction D22 (see reference). Figure 2 Additionally, one side of the vertical direction D3 is the upward direction D31, and the other side of the vertical direction D3 is the downward direction D32. In this embodiment, the downward direction D32 is the direction of gravity, but it is not limited to this.

[0025] The injection molding machine 10 includes a mold clamping unit 12 and an injection unit 14. The mold clamping unit 12 and the injection unit 14 are separable. The mold clamping unit 12 and the injection unit 14 are connected at a joint 16. The joint 16 is the part where the mold clamping unit 12 and the injection unit 14 meet.

[0026] The mold clamping unit 12 has a first chassis 20 and a mold clamping device 22. The first chassis 20 is a platform for mounting the mold clamping device 22. The mold clamping device 22 has a fixed pressure plate 24, a rear pressure plate 26, a movable pressure plate 28, a mold 30, a plurality of connecting rods 32, and a plate drive mechanism 34.

[0027] Fixed pressure plate 24 and rear pressure plate 26 are spaced apart from each other on the upper surface of the first chassis 20. A nozzle insertion hole HL is formed in the fixed pressure plate 24. A movable pressure plate 28 is disposed between the fixed pressure plate 24 and the rear pressure plate 26. The mold 30 consists of a fixed mold M1 and a movable mold M2. The fixed mold M1 is mounted on the surface of the fixed pressure plate 24 opposite to the movable pressure plate 28. The movable mold M2 is mounted on the surface of the movable pressure plate 28 opposite to the fixed pressure plate 24. Multiple connecting rods 32 are rod-shaped components. One end of each connecting rod 32 is fixed to the fixed pressure plate 24, and the other end of each connecting rod 32 is fixed to the rear pressure plate 26. Each connecting rod 32 passes through the movable pressure plate 28, allowing the movable pressure plate 28 to move along the connecting rod 32.

[0028] The pressure plate drive mechanism 34 closes the mold 30 by moving the movable pressure plate 28 in the pressure plate approach direction (rear direction D12). The pressure plate approach direction is the direction in which the movable pressure plate 28 approaches the fixed pressure plate 24, which is also the direction in which the mold 30 closes. The pressure plate drive mechanism 34 opens the mold 30 by moving the movable pressure plate 28 in the pressure plate separation direction (forward direction D11). The pressure plate separation direction is the direction in which the movable pressure plate 28 separates from the fixed pressure plate 24, which is also the direction in which the mold 30 opens. In addition, the opening and closing direction of the mold 30 is along the front-rear direction D1.

[0029] The injection unit 14 has a second chassis 36 and an injection device 38. The second chassis 36 is a platform for mounting the injection device 38. The second chassis 36 consists of a chassis body 36A and a connecting member 36B. The connecting member 36B is fixed to the end E1 of the chassis body 36A in the forward direction D11. A plurality of guide rails 40 are provided on the upper surface of the chassis body 36A. The plurality of guide rails 40 are located between the connecting member 36B and the end E2 of the chassis body 36A in the rearward direction D12. The plurality of guide rails 40 are spaced apart in the left-right direction D2 and extend parallel to each other in the front-back direction D1.

[0030] The injection device 38 includes an injection section 42, a cylinder section 44, a nozzle 46, and a nozzle contact mechanism 48. The injection section 42 is configured to move on a guide rail 40. The cylinder section 44 extends forward in a direction D11 from the injection section 42. The nozzle 46 is formed as a tube communicating with the interior of the cylinder section 44 and extends forward in a direction D11 from the front end of the cylinder section 44.

[0031] The nozzle contact mechanism 48 is a mechanism that moves the injection section 42 in the back-and-forth direction D1. The nozzle contact mechanism 48 includes a motor 50, a ball screw shaft 52, and a ball screw nut 54.

[0032] Motor 50 is used to move injection unit 42 in the forward direction D11 or the backward direction D12. Ball screw shaft 52 extends along the forward-backward direction D1. The rearward end of ball screw shaft 52 is connected to the rotor shaft of motor 50 via coupling 56. The forward end of ball screw shaft 52 is connected to connecting member 36B. Ball screw nut 54 is screwed onto ball screw shaft 52 and connected to injection unit 42 via spring 58. Ball screw nut 54 cannot rotate relative to injection unit 42. Alternatively, spring 58 can be removed.

[0033] When the motor 50 is driven in the first rotational direction, the ball screw shaft 52 connected to the rotor shaft of the motor 50 rotates in the first rotational direction, and the ball screw nut 54, which is screwed to the ball screw shaft 52, moves forward in the direction D11. According to the forward movement of the injection unit 42 in the direction D11, the nozzle 46 is inserted into the nozzle insertion hole HL of the fixed pressure plate 24. When the nozzle 46 reaches the nozzle contact portion (sprue sleeve) of the mold 30, the injection unit 42 becomes capable of injecting molding material from the nozzle 46 via the cylinder portion 44.

[0034] When the motor 50 is driven in a second rotation direction opposite to the first rotation direction, the ball screw shaft 52 rotates in the second rotation direction, and the ball screw nut 54 moves backward in a direction D12. As a result, the injection unit 42 moves backward in a direction D12. Based on the backward movement of the injection unit 42 in the direction D12, the nozzle 46 moves away from the fixed pressure plate 24. In this case, the injection unit 42 does not inject molding material from the nozzle 46.

[0035] [Structure of the joint]

[0036] Figure 2 This is a diagram showing the joint 16. The joint 16 is composed of a pair of first joint pieces 60 and a pair of second joint pieces 62.

[0037] A pair of first engaging tabs 60 are disposed on the rear surface 24F of the fixed pressure plate 24. The movable pressure plate 28 faces the front surface of the fixed pressure plate 24, which is opposite to the rear surface 24F. The pair of first engaging tabs 60 have engaging surfaces 60F that engage with second engaging tabs 62. The engaging surfaces 60F are located at a position D12 away from the rear surface 24F of the fixed pressure plate 24, and are substantially parallel to the rear surface 24F of the fixed pressure plate 24.

[0038] A pair of first engaging tabs 60 are symmetrically arranged in the left-right direction D2 with reference to the nozzle insertion hole HL. First engaging tab 60A is the first engaging tab 60 on the left. First engaging tab 60B is the first engaging tab 60 on the right. First engaging tabs 60A and 60B have the same structure and protrude slightly rearward in the rear direction D12 from the rear surface 24F of the fixing plate 24. A plurality of threaded holes 64 are formed in the first engaging tabs 60.

[0039] A pair of second engaging portions 62 are disposed on the connecting member 36B. The connecting member 36B has a support platform portion 36B1 and a pair of arms 36B2. The support platform portion 36B1 is mounted on the upper surface of the chassis body 36A. Alternatively, the support platform portion 36B1 may also be mounted on the side of the chassis body 36A.

[0040] A pair of arms 36B2 are spaced apart in the left-right direction D2, extending from the support platform 36B1 upwards towards D31. The nozzle centerline LN is located between the pair of arms 36B2. The nozzle centerline LN passes through the nozzle 46 (see reference). Figure 1 An imaginary line representing the axis of the nozzle. A pair of arms 36B2 are symmetrically arranged in the left-right direction D2 with respect to the nozzle centerline LN. The upper end of each pair of arms 36B2 constitutes a second engaging piece 62. Alternatively, the portion of the arms 36B2 other than the upper end may also constitute the second engaging piece 62.

[0041] A pair of second engaging tabs 62 have engaging surfaces 62F that engage with the first engaging tab 60. Engaging surfaces 62F are located at a position separated from the arm 36B2 in the forward direction D11.

[0042] A pair of second engagement pieces 62 are symmetrically arranged in the left-right direction D2 with respect to the nozzle centerline LN. Second engagement piece 62A is the second engagement piece 62 on the left. Second engagement piece 62B is the second engagement piece 62 on the right. Second engagement piece 62A and second engagement piece 62B have the same structure and protrude slightly from the arm portion 36B2 in the forward direction D11.

[0043] The second mating piece 62 has a plurality of through holes 66 extending along the front-rear direction D1. These through holes 66 are for fasteners such as bolts to pass through. The cross-sectional shape of the through holes 66 can be circular or elliptical. Fasteners passing through the through holes 66 are screwed into the threaded holes 64 of the first mating piece 60, thereby connecting the mold clamping unit 12 to the injection unit 14.

[0044] [Link Method]

[0045] The connection between the mold clamping unit 12 and the injection unit 14 is performed as follows. First, the mating surfaces 60F of the first mating piece 60 and 62F of the second mating piece 62 face each other at a certain interval in the front-rear direction D1. Next, the mold clamping unit 12 and the injection unit 14 move relative to each other in a close manner. When the mating surface 60F of the first mating piece 60 contacts the mating surface 62F of the second mating piece 62, the relative movement between the mold clamping unit 12 and the injection unit 14 stops. Then, by screwing the fastener passing through the through hole 66 into the threaded hole 64, the first mating piece 60 and the second mating piece 62 constituting the joint 16 are fixed. Thus, the mold clamping unit 12 is connected to the injection unit 14.

[0046] [Location mechanism]

[0047] In this embodiment, a positioning mechanism 68 is provided for positioning the relative positions of the mold clamping unit 12 and the injection unit 14. The positioning mechanism 68 is provided in the joint portion 16. In this embodiment, the positioning mechanism 68 is provided in the left joint portion 16A of the pair of joint portions 16, but not in the right joint portion 16B.

[0048] Alternatively, the positioning mechanism 68 may be provided on the right joint 16B instead of the left joint 16A. Or, the positioning mechanism 68 may be provided on both the left joint 16A and the right joint 16B.

[0049] The positioning mechanism 68 has a protrusion 70 and a recess 72. The protrusion 70 is provided on the first engaging piece 60. The recess 72 is provided on the second engaging piece 62. Alternatively, the protrusion 70 may also be provided on the second engaging piece 62. In this case, the recess 72 is provided on the first engaging piece 60.

[0050] The protrusion 70 protrudes rearward in a direction D12 from the engagement surface 60F of the first engagement piece 60. Furthermore, when the protrusion 70 is provided on the second engagement piece 62, it protrudes forward in a direction D11 from the engagement surface 62F of the second engagement piece 62. The protrusion 70 has a guide surface SL. The guide surface SL is formed to guide the engagement of the protrusion 70 with the recess 72. In this embodiment, the protrusion 70 is shaped like a projectile. In this case, the outer peripheral surface of the protrusion 70, which has a smaller cross-sectional area towards the front end, becomes the guide surface SL.

[0051] The recess 72 is recessed from the engagement surface 62F of the second engagement piece 62 toward the rearward direction D12. Furthermore, when the recess 72 is provided on the first engagement piece 60, the recess 72 is recessed from the engagement surface 60F of the first engagement piece 60 toward the forward direction D11. The protrusion 70 can be inserted into the recess 72.

[0052] The recess 72 extends through the second mating piece 62, but may not. The mating surface 60F of the first mating piece 60 and the mating surface 62F of the second mating piece 62 must be able to contact each other. Therefore, the recess amount of the recess 72 must be greater than or equal to the protrusion amount of the convex portion 70. The recess amount of the recess 72 is the length of the recess 72 in the rearward direction D12 from the mating surface 62F. The protrusion amount of the convex portion 70 is the length of the convex portion 70 in the rearward direction D12 from the mating surface 60F. Furthermore, when the recess 72 is provided on the first mating piece 60, the recess amount is the length of the recess 72 in the forward direction D11 from the mating surface 60F. In this case, the protrusion amount of the convex portion 70 is the length of the convex portion 70 in the forward direction D11 from the mating surface 62F.

[0053] Figure 3 This diagram shows the state in which the mating surface 60F of the first mating piece 60 and the mating surface 62F of the second mating piece 62 are facing each other. Furthermore, this state is a view of the first mating piece 60 and the second mating piece 62 from above. Figure 3 In this configuration, the mold clamping unit 12 and the injection unit 14 are offset in the left-right direction D2. In this state, when the mold clamping unit 12 and the injection unit 14 move relative to each other in a close manner, the guide surface SL of the protrusion 70 contacts the edge of the recess 72. As the relative movement continues, as... Figure 4 As shown, the protrusion 70 slides inside the recess 72 via the guide surface SL. Thus, the protrusion 70 and the recess 72 engage, and this engagement positions the mold clamping unit 12 and the injection unit 14 in the left-right direction D2. That is, through the relative sliding engagement of the protrusion 70 and the recess 72, the offset of the relative positions of the mold clamping unit 12 and the injection unit 14 in the left-right direction D2 is corrected.

[0054] Thus, based on the relative movement of the mold clamping unit 12 and the injection unit 14, the protrusion 70 and the concave portion 72 slide relative to each other and engage. As a result, the relative position of the mold clamping unit 12 and the injection unit 14 in the left-right direction D2 can be easily fine-tuned.

[0055] [Modified Implementation]

[0056] The above embodiments can also be modified as described below. Furthermore, in the following modifications, the same reference numerals are used for components that are identical to those in the above embodiments. Additionally, in the following modifications, descriptions that are repeated in the above embodiments are omitted.

[0057] (Variation Example 1)

[0058] Figure 5 This is a diagram showing the mold-closing unit 12 of modified example 1. Figure 6This is a diagram showing the injection unit 14 of Modified Example 1. In this modified example, in addition to the left-side joint 16A and the right-side joint 16B, a central joint 16C is newly provided. The central joint 16C is positioned between the left-side joint 16A and the right-side joint 16B when viewed from above.

[0059] The central joint 16C consists of the first joint piece 60C (see reference). Figure 5 ) and the second joining piece 62C (refer to) Figure 6 Composed of ) such as Figure 5 As shown, the first engaging piece 60C does not protrude from the rear surface 24F of the fixed pressure plate 24, and the engaging surface 60F of the first engaging piece 60C is coplanar with the rear surface 24F of the fixed pressure plate 24. In other words, the engaging surface 60F of the first engaging piece 60C is located at a position D11 forward than the engaging surface 60F of the first engaging piece 60A and the engaging surface 60F of the first engaging piece 60B.

[0060] like Figure 6 As shown, the second engaging piece 62C is disposed on the connecting member 36C. The connecting member 36C is one of the constituent elements of the second chassis 36, together with the chassis body 36A and the connecting member 36B. The connecting member 36C is fixed to its end E1 in the forward direction D11 of the chassis body 36A and extends downward. A portion of the connecting member 36C forms the second engaging piece 62C. The engaging surface 62F of the second engaging piece 62C is located in the forward direction D11 position, which is more forward than the engaging surface 62F of the second engaging piece 62A and the engaging surface 62F of the second engaging piece 62B.

[0061] In this modified example, the protrusion 70 and the recess 72 are provided at the two joints 16, namely the left joint 16A and the central joint 16C. Therefore, compared to the case where the positioning mechanism 68 is provided at only one joint 16, the load applied to the positioning mechanism 68 can be reduced.

[0062] Alternatively, in this modified example, the connecting member 36B may be omitted. Without the connecting member 36B, the protrusion 70 and the recess 72 are only provided at the central joint 16C. This achieves the same effect as the embodiment described above.

[0063] (Variation Example 2)

[0064] Figure 7 This is a diagram showing the mold clamping unit 12 of Modified Example 2. The mold clamping unit 12 of Modified Example 2 is provided instead of the mold clamping unit 12 of Modified Example 1. In the mold clamping unit 12 of Modified Example 2, the first joining piece 60A, the first joining piece 60B, and the first joining piece 60C are not provided on the fixed pressure plate 24, but are provided on the first chassis 20.

[0065] In this modified example, the first chassis 20 has a chassis body 20A, a connecting member 37, and a connecting member 39. The connecting member 37 and the connecting member 39 may also be integrally formed with the chassis body 20A of the first chassis 20. Alternatively, the connecting member 37 and the connecting member 39, as components different from the chassis body 20A of the first chassis 20, may also be fixed to the chassis body 20A.

[0066] The connecting member 37 is, for example, generally cuboid in shape, and is disposed at end E3 on the rearward direction D12 of the chassis body 20A of the first chassis 20. The connecting member 39 is disposed on the connecting member 37. The connecting member 39 has the same structure as the connecting member 36B.

[0067] The upper end of one of the pair of arms 36B2 in the connecting member 39 forms the first engaging piece 60A. The upper end of the other of the pair of arms 36B2 in the connecting member 39 forms the first engaging piece 60B. Additionally, a portion of the connecting member 37 forms the first engaging piece 60C.

[0068] In this way, even if the first joining piece 60A, the first joining piece 60B and the first joining piece 60C are provided on the first chassis 20, the same effect as in the above-described modified example 1 can be obtained.

[0069] (Variation Example 3)

[0070] Figure 8 This diagram shows the joint 16A in modified example 3. In this modified example, the recess 72 is a through hole penetrating the second joint piece 62. The dimension SZ1 of the recess 72 in the vertical direction D3 is larger than the dimension SZ2 of the recess 72 in the horizontal direction D2. In other words, the shape of the recess 72 is an elongated hole shape. However, the shape of the recess 72 is not limited to an elongated hole shape.

[0071] The protrusion 70 can be attached to and detached from the first engaging tab 60. Furthermore, when the protrusion 70 is provided on the second engaging tab 62, the protrusion 70 can be attached to and detached from the second engaging tab 62.

[0072] like Figure 9 As shown, the protrusion 70 has a disassembly / assembly portion 80 and a main body portion 82. The disassembly / assembly portion 80 is a portion that can be disassembled and assembled to the threaded hole SH. The threaded hole SH is formed in the first engaging piece portion 60 (or the second engaging piece portion 62). The disassembly / assembly portion 80 is formed in the shape of a rod, and has a threaded groove 80G on its outer peripheral surface. The main body portion 82 is a portion that is inserted into the recess 72. The main body portion 82 is provided at one end of the disassembly / assembly portion 80, and has a guide surface SL on its outer peripheral surface. The outer diameter of the main body portion 82 is larger than the outer diameter of the disassembly / assembly portion 80.

[0073] The main body 82 has a tool fitting portion 84 that can be fitted with a tool for rotating the protrusion 70. For example, if the tool is a flathead screwdriver, the tool fitting portion 84 has a flat slot. Or, if the tool is a Phillips head screwdriver, the tool fitting portion 84 has a Phillips head slot. Or, if the tool is an internal hexagonal bar, the tool fitting portion 84 has a hexagonal hole. Or, if the tool is a wrench or a wrench, the tool fitting portion 84 has a hexagonal outer diameter portion.

[0074] like Figure 10 As shown, when the boss BS is formed on the first engaging piece 60 (or the second engaging piece 62), the protrusion 70 can also be attached to and detached from the boss BS. A screw hole BH1 is formed on the outer peripheral surface of the boss BS. In this case, in the detachment part 80, a boss fitting hole 80H is provided at the end of the detachment part 80 instead of a threaded groove 80G. Additionally, a screw hole BH2 is formed on the outer peripheral surface of the detachment part 80. The screw hole BH1 of the boss BS and the screw hole BH2 of the detachment part 80, which is inserted into the boss hole, are fixed by screws (not shown). The tool fitting part 84 is formed as a screw.

[0075] In this modified example, the protrusion 70 inserted into the recess 72 (through hole) can be removed via the recess 72 (through hole). Therefore, after connecting the mold-forming unit 12 and the injection unit 14, the protrusion 70 can be removed. Thus, during the connection between the mold-forming unit 12 and the injection unit 14, accidental force applied to the mold-forming unit 12 or the injection unit 14, causing the protrusion 70 to contact the recess 72, can be prevented. Furthermore, when the connected mold-forming unit 12 and the injection unit 14 are separated, contact between the protrusion 70 and the recess 72 can be prevented. As a result, wear and breakage of the protrusion 70 or the recess 72 can be suppressed.

[0076] (Variation Example 4)

[0077] The shape of the protrusion 70 is not limited to the shape of a projectile. For example, as Figure 11A As shown, the shape of the protrusion 70 can also be a cuboid. Or, as... Figure 11B As shown, the shape of the protrusion 70 can also be a triangular prism. Or, as... Figure 11C As shown, the shape of the protrusion 70 can also be hemispherical. Or, as... Figure 11D As shown, the shape of the protrusion 70 can also be cylindrical. Or, as... Figure 11E As shown, the shape of the protrusion 70 can also be conical. Or, as... Figure 11F As shown, the shape of the protrusion 70 can also be a semi-cylindrical shape.

[0078] Furthermore, there are cases where the shape of the protrusion 70 is a cuboid, and the protrusion 70 does not have a guide surface SL. In this case, the guide surface SL is formed on the inner peripheral surface of the recess 72.

[0079] like Figure 11G As shown, the protrusion 70 can also be composed of a base 70A and a main body 70B. The base 70A protrudes from the first joining piece 60 (or the second joining piece 62). The main body 70B is connected to the base 70A and extends in the vertical direction D3. Figure 11G In this example, the base 70A is formed into a cuboid shape. The main body 70B is formed into a cylindrical shape, and the outer peripheral surface of the main body 70B becomes the guide surface SL.

[0080] like Figure 11H As shown, the main body 70B can also be composed of a shaft 70B_1 and a roller 70B_2 rotatably mounted on the shaft 70B_1. Figure 11H In this example, roller 70B_2 is formed in an annular shape. Roller 70B_2 is able to roll on the inner circumferential surface of recess 72. As a result, protrusion 70 and recess 72 can easily slide relative to each other.

[0081] (Variation Example 5)

[0082] The shape of the recess 72 when the second connecting piece 62 is penetrated is not limited to a circular hole (see reference). Figure 2 , Figure 6 ) or elongated hole (refer to) Figure 8 For example, such as Figure 12A As shown, the shape of the recess 72 can also be a square hole shape. Furthermore, the shape of the recess 72 is not particularly limited when it does not penetrate the second engaging piece 62. For example, as... Figure 12B As shown, the shape of the recess 72 can also be a semi-cylindrical groove. Or, as... Figure 12C As shown, the shape of the recess 72 can also be a U-groove shape. Or, as... Figure 12D As shown, the shape of the recess 72 can also be a V-groove. Although not shown, the shape of the recess 72 can also be a hemispherical groove.

[0083] Furthermore, when the shape of the recess 72 is a V-groove or the like, a guide surface SL is formed on the inner circumferential surface of the recess 72.

[0084] (Variation Example 6)

[0085] Figure 13A This is a diagram showing the joint 16A of modified example 6 before the relative positions were adjusted. Figure 13B This diagram shows the joint 16A of modified example 6 after adjusting the relative positions. In this modified example, the injection molding machine 10 has a positioning part 90 for positioning the clamping unit 12 and the injection unit 14 in the height direction. Positioning in the height direction is performed, for example, by an adjuster (not shown) provided on the legs of the first chassis 20 or the second chassis 36.

[0086] In this modified example, the injection molding machine 10 has a first positioning part 90A and a second positioning part 90B as positioning parts 90. The first positioning part 90A is provided in the mold clamping unit 12. For example, the first positioning part 90A is the upper surface F1 of the first engaging piece 60A that protrudes rearward in a direction D12 from the rear surface 24F of the fixed pressure plate 24, but it is not limited to this. The second positioning part 90B is provided in the injection unit 14. For example, the second positioning part 90B is the upper surface F2 of the second engaging piece 62A provided at the upper end of the arm 36B2, but it is not limited to this.

[0087] like Figure 14 As shown, the injection molding machine 10 may have a third positioning part 90C as a positioning part 90. The third positioning part 90C may be provided in the mold closing unit 12 or in the injection unit 14. Figure 14 The image shows an example where a third positioning portion 90C is provided in the mold clamping unit 12. The third positioning portion 90C has a scale 92. The scale 92 is formed along the vertical direction D3 in, for example, the first engagement piece portion 60A. In this modified example, in the first engagement piece portion 60A, a flat portion 94 extending along the vertical direction D3 is formed between the engagement surface 60F and the side surface F3, and the scale 92 is provided on the flat portion 94.

[0088] In this way, by providing the positioning part 90, the operator can easily adjust the relative position of the mold clamping unit 12 and the injection unit 14 in the height direction while visually observing the positioning part 90. Furthermore, the adjustment accuracy is easily improved when the positioning part 90 has a scale 92.

[0089] (Variation Example 7)

[0090] like Figure 15 As shown, the injection unit 14 may also include a second chassis 100 and a second injection device 110. In this case, the second chassis 36 and the injection device 38 may not be included.

[0091] The second chassis 100 is a platform for mounting the second injection device 110. The second injection device 110 is an injection device that injects molding material from a direction intersecting the opening and closing direction (front-back direction D1) of the mold 30 (left-right direction D2). The second injection device 110 is located on the right or left side of the mold 30. Figure 15 The image shows an example where the second injection device 110 is positioned on the left side of the mold 30.

[0092] The second injection device 110 includes an injection section 42A, a cylinder section 44A, and a nozzle 46A. The injection section 42A is configured to move on a guide rail 40A. The guide rail 40A is provided on the upper surface of the chassis body 100A of the second chassis 100. The cylinder section 44A extends from the injection section 42A in a direction along the left-right direction D2. The nozzle 46A extends from the front end of the cylinder section 44A in a direction along the left-right direction D2. The nozzle 46A can be inserted into a second nozzle insertion hole (not shown) formed in the mold 30. The second nozzle insertion hole can be formed in the fixed mold M1 or the movable mold M2. Alternatively, the second nozzle insertion hole can be formed in both the fixed mold M1 and the movable mold M2.

[0093] When the injection unit 14 is equipped with the second injection device 110, the injection molding machine 10 has a joint portion 16D that connects the mold clamping unit 12 and the injection unit 14. At the joint portion 16D, the first chassis 20 of the mold clamping unit 12 is engaged with the second chassis 100 of the injection unit 14.

[0094] For example, the first chassis 20 has a connecting component 39 as described above ( Figure 7 The connecting component 120 has the same structure as the connecting component 36B. The connecting component 120 is located at its end E10 on the left-hand side D21 of the chassis body 20A of the first chassis 20. The second chassis 100 has a connecting component 36B with the same structure as the connecting component 36B. Figure 2 The connecting component 130 has the same structure. The connecting component 130 is located at the end E20 on the right-hand side D22 of the chassis body 100A of the second chassis 100.

[0095] The protrusion 70 provided on the connecting member 120 and the recess 72 provided on the connecting member 130 constitute the positioning mechanism 68. In this case, the protrusion 70 and the recess 72 slide relative to each other and engage with each other in the direction along the left-right direction D2. Through this engagement, the mold closing unit 12 and the injection unit 14 are positioned in the direction along the front-back direction D1.

[0096] (Variation Example 8)

[0097] The above-described embodiments and variations can also be combined arbitrarily without causing contradictions.

[0098] [Functions and Effects]

[0099] According to this embodiment, a protrusion 70 is provided on one of the mold-closing unit 12 and the injection unit 14, and a recess 72 is provided on the other. The protrusion 70 and the recess 72 slide relative to each other and engage with each other in the direction along the injection direction of the molding material. Through this engagement, the mold-closing unit 12 and the injection unit 14 are positioned in the horizontal plane in a direction perpendicular to the injection direction. Therefore, the relative position between the mold-closing unit 12 and the injection unit 14 can be finely adjusted in conjunction with the operation of bringing the mold-closing unit 12 and the injection unit 14 closer together. As a result, the relative position between the mold-closing unit 12 and the injection unit 14 can be well adjusted.

[0100] [Postscript]

[0101] Regarding the above-described embodiments, the following notes are further disclosed.

[0102] (Note 1)

[0103] This disclosure discloses an injection molding machine (10) comprising a mold closing unit (12) for opening and closing a mold (30) and an injection unit (14) for injecting molding material, characterized in that it comprises: a protrusion (70) disposed on one of the mold closing unit and the injection unit; and a recess (72) disposed on the other of the mold closing unit and the injection unit, wherein the protrusion and the recess slide relative to each other in a direction along the injection direction of the molding material and engage with each other, thereby positioning the mold closing unit and the injection unit by the engagement.

[0104] (Note 2)

[0105] According to the injection molding machine described in Appendix 1, the recess may also be a through hole into which the protrusion can be inserted, and the protrusion inserted into the through hole can be removed through the through hole.

[0106] (Note 3)

[0107] According to the injection molding machine described in Appendix 1 or 2, the protrusion may also have: a disassembly portion 80, which can be disassembled and assembled to one of the mold closing unit and the injection unit; and a main body portion 82, which is inserted into the recess, wherein a tool fitting portion 84 is formed in the disassembly portion or the main body portion, the tool fitting portion 84 being capable of fitting a tool for rotating the protrusion.

[0108] (Note 4)

[0109] According to any one of the appendices 1 to 3, the injection molding machine may also have at least one of the mold clamping unit and the injection unit having a positioning part (90) for positioning the mold clamping unit and the injection unit in the height direction.

[0110] (Note 5)

[0111] According to any one of the appendices 1 to 4, the injection molding machine may also have a roller (70B_2) capable of rolling on the inner circumferential surface of the recess.

[0112] (Note 6)

[0113] According to any one of the appendices 1 to 5, the injection molding machine may also have the shape of the protrusion being any one of the following: projectile shape, cuboid shape, triangular prism shape, hemispherical shape, cylindrical shape, conical shape, and semi-cylindrical shape.

[0114] (Note 7)

[0115] According to any one of the appendices 1 to 6, the injection molding machine may also have the shape of the recess being any one of a circular hole shape, an elongated hole shape, a square hole shape, a semi-cylindrical groove shape, a U-groove shape, or a V-groove shape.

[0116] (Note 8)

[0117] According to any one of the appendices 1 to 7, the injection molding machine may also have the protrusion and the recess disposed at the joint (16) where the mold closing unit and the injection unit are connected.

[0118] (Note 9)

[0119] According to the injection molding machine described in Appendix 8, it may also include a plurality of said joints, wherein the protrusion and the recess are provided in at least one of the plurality of said joints.

[0120] (Postscript 10)

[0121] According to the injection molding machine described in Appendix 8 or 9, the mold clamping unit may have: a fixed pressure plate (24) that fixes a portion of the mold; and a first chassis (20) that mounts the fixed pressure plate; the injection unit has: an injection device (38) that injects the molding material; and a second chassis (36) that mounts the injection device; the joint is at least one of the portion where the first chassis and the second chassis meet and the portion where the fixed pressure plate and the second chassis meet.

[0122] (Postscript 11)

[0123] According to the injection molding machine described in Appendix 10, it may be at least one of the first chassis and the second chassis, including a chassis body (20A, 36A) and a connecting component (36B or 36C) mounted on the chassis body.

[0124] This disclosure has been described in detail, but it is not limited to the various embodiments described above. These embodiments can be modified, altered, or partially deleted in various ways without departing from the spirit of this disclosure or from the spirit of the disclosure derived from the claims and their equivalents. Furthermore, these embodiments can also be implemented in combination. For example, in the embodiments described above, the order of actions and processes is shown as an example and is not limited thereto. Similarly, the use of numerical values ​​or mathematical formulas in the description of the embodiments also applies.

[0125] Symbol Explanation

[0126] 10: Injection Molding Machine

[0127] 12: Mold closing unit

[0128] 14: Injection Unit

[0129] 16: Joint

[0130] 20: First Chassis

[0131] 20A: Chassis Main Body

[0132] 22: Mold Closing Device

[0133] 24: Fixed pressure plate

[0134] 30: Mold

[0135] 36: Second chassis

[0136] 36A: Chassis Main Body

[0137] 36B: Connecting component

[0138] 36C: Connecting component

[0139] 38: Injection device

[0140] 60: First joining piece

[0141] 62: Second joining piece

[0142] 68: Positioning mechanism

[0143] 70: convex part

[0144] 70A: Base

[0145] 70B: Main body

[0146] 70B_1: Shaft

[0147] 70B_2: Roller

[0148] 72: Concave

[0149] 80: Assembly and Disassembly Department

[0150] 82: Main body

[0151] 84: Tool fitting part

[0152] 90: Positioning Department

Claims

1. An injection molding machine comprising a mold closing unit for opening and closing a mold and an injection unit for injection molding material, characterized in that, have: A protrusion, which is disposed on one of the mold closing unit and the injection unit; and A recess is provided on the other side of the mold closing unit and the injection unit. The protrusion and the recess slide relative to each other in a direction along the injection direction of the molding material and engage with each other, thereby positioning the mold closing unit and the injection unit through the engagement.

2. The injection molding machine according to claim 1, characterized in that, The recess is a through hole into which the protrusion can be inserted. The protrusion inserted into the through hole can be removed through the through hole.

3. The injection molding machine according to claim 1 or 2, characterized in that, The protrusion has: a detachable portion that can be detached from one of the mold closing unit and the injection unit; and a main body portion that inserts into the recess. A tool fitting portion is formed in the disassembly section or the main body section, which is capable of fitting a tool for rotating the protrusion.

4. The injection molding machine according to any one of claims 1 to 3, characterized in that, At least one of the mold-closing unit and the injection unit has a positioning part for positioning the mold-closing unit and the injection unit in the height direction.

5. The injection molding machine according to any one of claims 1 to 4, characterized in that, The protrusion has a roller capable of rolling on the inner circumferential surface of the recess.

6. The injection molding machine according to any one of claims 1 to 5, characterized in that, The shape of the protrusion can be any one of the following: projectile shape, cuboid shape, triangular prism shape, hemispherical shape, cylindrical shape, conical shape, or semi-cylindrical shape.

7. The injection molding machine according to any one of claims 1 to 6, characterized in that, The shape of the recess can be any one of the following: a circular hole, an elongated hole, a square hole, a semi-cylindrical groove, a U-groove, or a V-groove.

8. The injection molding machine according to any one of claims 1 to 7, characterized in that, The protrusion and the recess are disposed at the joint where the mold closing unit and the injection unit meet.

9. The injection molding machine according to claim 8, characterized in that, The joint has multiple portions. The protrusion and the recess are provided in at least one of the plurality of the joints.

10. The injection molding machine according to claim 8 or 9, characterized in that, The mold clamping unit has a fixing plate for fixing a portion of the mold and a first chassis mounted on the fixing plate. The injection unit has an injection device for injecting the molding material and a second chassis that mounts the injection device. The joint is at least one of the portion where the first chassis connects to the second chassis and the portion where the fixing plate connects to the second chassis.

11. The injection molding machine according to claim 10, characterized in that, At least one of the first chassis and the second chassis includes a chassis body and a connecting component mounted on the chassis body.

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