CN109476060B - Injection device mounting plate for mold and mold - Google Patents

Injection device mounting plate for mold and mold Download PDF

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Publication number
CN109476060B
CN109476060B CN201780044134.5A CN201780044134A CN109476060B CN 109476060 B CN109476060 B CN 109476060B CN 201780044134 A CN201780044134 A CN 201780044134A CN 109476060 B CN109476060 B CN 109476060B
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China
Prior art keywords
mold
injection device
injection
mounting plate
cavity
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Active
Application number
CN201780044134.5A
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Chinese (zh)
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CN109476060A (en
Inventor
有马祐一朗
大串拓也
宫本和明
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Ube Machinery Corp Ltd
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Ube Machinery Corp Ltd
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Publication of CN109476060A publication Critical patent/CN109476060A/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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/13—Injection moulding apparatus using two or more injection units co-operating with a single mould
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2725—Manifolds
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws

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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)

Abstract

An injection device mounting plate for a mold is used for mounting a coaxial screw type injection device on a mold, the coaxial screw type injection device including a fixed frame and a plasticizing screw shaft rotatable and movable with respect to the fixed frame, the injection device mounting plate for a mold having: a side surface of a fixing frame capable of fixedly arranging the coaxial screw type injection device; and a hot runner that is open on a side surface and can accommodate a plasticizing screw shaft, the hot runner being configured to be capable of plasticizing and metering a resin material in cooperation with the plasticizing screw shaft of the coaxial screw injection device and to be capable of flowing the plasticized resin material toward a cavity of a mold.

Description

Injection device mounting plate for mold and mold
Technical Field
The present invention relates to a mold injection device mounting plate for mounting a coaxial screw injection device on a mold, and a mold.
Background
Conventionally, as an injection molding apparatus dedicated for a laminate molded product for molding the laminate molded product using a plurality of color resin materials or a plurality of types of resin materials, a multicolor multi-material injection molding apparatus having a plurality of injection units of substantially the same size has been widely used. Such a conventional multicolor multi-material injection molding apparatus can be suitably used when the injection filling amount of the resin materials of a plurality of colors or a plurality of types used for 1 laminate molded article is substantially the same. On the other hand, when there is a clear difference in the injection filling amount between a plurality of colors or a plurality of types of resin materials such as the main material and the sub material and the injection filling amount of the sub material other than the injection filling amount of the main material is small, the sub material is held in a plasticized state longer than the main material in the injection unit that injects and fills the sub material, and therefore there is a possibility that the quality of the sub material is degraded. Further, the mold cavity into which the sub-material is injected and filled is often unevenly present at a plurality of locations as compared with the mold cavity into which the main material is injected and filled, and in this case, the resin flow path (hot runner) to the mold cavity for the sub-material becomes long, so that the following problems occur: the structure of the mold becomes complicated; and the time for maintaining the resin flow path in a plasticized state is increased due to the increase in the length of the resin flow path for the sub-material, which may cause the quality of the sub-material to be degraded.
Therefore, conventionally, when the injection filling amount of the sub-material other than the injection filling amount of the main material is small, an injection molding apparatus in which a small sub-injection unit is additionally mounted to a general-purpose injection molding apparatus including 1 main injection unit has been suitably used (patent document 1).
As shown in fig. 6 and 7, patent document 1 discloses an injection molding apparatus including a main injection unit (1 st injection machine, not shown) for a main material and a sub-injection unit (2 nd injection machine) 110 for a sub-material. In the injection molding apparatus of patent document 1, the sub-injection unit 110 is a screw type injection machine including: a heating drum (heating cylinder) 112 having a screw 111 built therein; a flange portion 113 integrally formed at the rear end of the heating drum 112; an injection cylinder 115 attached to the flange portion 113 via a plurality of connecting rods 114; a slider 116 attached to the connecting rod 114 so as to be movable between the injection cylinder 115 and the flange 113; a metering motor 117 provided to the slider 116; and a material supply pipe (hopper) 118 for supplying a material into the heating drum 112. As shown in fig. 6, a large-diameter hole 102 capable of accommodating a heating cylinder 112 of the sub-injection unit 110 is formed in the mold 100, and a resin supply port 104 is formed in the bottom of the large-diameter hole 102.
The heating roller 112 of the sub-injection unit 110 having the above-described structure is inserted into the large-diameter hole 102 of the mold 100, and is urged by the elastic member 122 such as a spring so that the injection nozzle 119 is brought into close contact with the resin supply port 104 of the mold 100, and in this state, the sub-injection unit 110 is mounted to the mold 100 via the mounting mechanism 120.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2003-053770
Disclosure of Invention
Problems to be solved by the invention
However, the injection molding apparatus of patent document 1 is configured such that the elastic member 122 is interposed between the sub-injection unit 110 and the mold 100, and therefore the sub-injection unit 110 cannot be firmly fixed to the mold 100. In the injection molding apparatus of patent document 1, the elastic member 122 presses the injection nozzle 119 of the sub-injection unit 110, and the sliding portion of the related members requires a gap for sliding the related members, so that the sub-injection unit 110 may move in a direction other than the biasing direction of the elastic member 122. In addition, in view of these factors, in the injection molding apparatus of patent document 1, vibration generated by mold opening and closing operation, mold clamping operation, injection filling operation, and the like causes a static load of the sub-injection unit 110 to act on a fixed portion of the sub-injection unit 110 fixed to the mold 100 and the elastic member 122, and a dynamic load of the sub-injection unit 110 is repeatedly applied thereto, so that there is a problem that the fixed portion and the elastic member 122 may be damaged. In the injection molding apparatus of patent document 1, the injection nozzle 119, which is pressed against the resin supply port 104 of the mold 100, slides in an unintended direction with respect to the resin supply port 104 due to the vibration, and therefore, there is a problem that abrasion and damage of the injection nozzle 119 and the resin supply port 104 of the mold 100 may occur.
Further, in the injection molding apparatus of patent document 1, since it is necessary to form a very large hole (large diameter hole 102) having a length and a diameter capable of accommodating the heating drum 112 of the sub-injection unit 100 in the mold 100, there is a problem that the mold 100 becomes large and the arrangement of the cavity is restricted.
The present invention has been made in view of the above circumstances, and an object thereof is to provide an injection device mounting plate for a mold and a mold that can firmly attach a coaxial screw type injection device to a mold and that have less restrictions on the mold in connection with attachment of the injection device.
Means for solving the problems
The present invention provides an injection device mounting plate for a mold for mounting a coaxial screw type injection device to the mold, the coaxial screw type injection device including a fixed frame and a plasticizing screw shaft rotatable and movable with respect to the fixed frame, the injection device mounting plate for a mold comprising: a side surface capable of fixing the fixing frame of the coaxial screw type injection device; and a hot runner that is open on the side surface and that can accommodate the plasticizing screw shaft, the hot runner being configured to be capable of plasticizing and metering a resin material in cooperation with the plasticizing screw shaft of the coaxial screw injection device and to be capable of flowing the plasticized resin material toward a cavity of the mold.
In the injection device mounting plate for a mold according to the present invention, the hot runner preferably includes: a plasticizing screw shaft housing portion capable of housing the plasticizing screw shaft; and an injection resin flow path communicating with a gate of a cavity of the mold, wherein the plasticizing screw shaft housing portion is configured such that one end portion thereof opens to the side surface and the other end portion thereof communicates with the injection resin flow path. In this case, a gate valve capable of opening and closing the gate may be disposed in the injection resin flow path of the hot runner.
In the injection device attachment plate for a mold according to the present invention, it is preferable that at least a portion of the hot runner including a region capable of housing the plasticizing screw shaft be formed of a replaceable cylindrical separate member.
The injection device mounting plate for a mold according to the present invention may be disposed continuously from a cavity block having a cavity surface capable of forming at least a part of a cavity of the mold. In this case, the mold injection device mounting plate according to the present invention is preferably arranged between a manifold block mounted on the mold mounting plate and the cavity block, and has a main injection resin flow path that communicates a main injection resin flow path formed in the manifold block with a main injection resin flow path formed in the cavity block.
The injection device mounting plate for a mold according to the present invention may be configured to mount the coaxial screw type injection device.
The mold of the present invention is characterized by comprising the above-described injection device mounting plate for a mold.
The mold of the present invention may further include a cavity block having a cavity surface capable of forming at least a part of a cavity of the mold, and the mold injection device attachment plate may be disposed continuously with the cavity block. In this case, the mold according to the present invention preferably further includes a manifold block attached to the mold attachment plate, the mold injection device attachment plate is provided between the manifold block and the cavity block, and main injection resin flow paths that flow the molten resin injected and filled from the main injection unit toward the cavity are formed in the manifold block, the mold injection device attachment plate, and the cavity block, respectively.
Effects of the invention
According to the present invention, it is possible to provide a mold injection device mounting plate and a mold that can firmly mount a coaxial screw type injection device to a mold and that have less restrictions on the mold in terms of mounting of the injection device.
Drawings
Fig. 1 is a front view schematically showing the structure of an injection molding apparatus according to an embodiment of the present invention.
Fig. 2 is a partially cut-away sectional view schematically showing the structure of the mold of the present embodiment.
Fig. 3 is a sectional view schematically showing the structure of the sub-injection unit of the present embodiment.
Fig. 4 is a diagram illustrating an assembling method of the mold injection device mounting plate according to the present embodiment.
Fig. 5 is a partially cut-away sectional view schematically showing the structure of a mold according to another embodiment of the present invention.
Fig. 6 is a diagram schematically showing the structure of a conventional injection molding apparatus.
Fig. 7 is a sectional view schematically showing the structure of a sub-injection unit portion in a conventional injection molding apparatus.
Detailed Description
Preferred embodiments for carrying out the present invention will be described below with reference to the accompanying drawings. The following embodiments are not intended to limit the inventions of the claims, and all combinations of the features described in the embodiments are not essential to the means for solving the problems.
The injection molding apparatus of the present embodiment is configured by adding a mold injection apparatus mounting plate 20 to which a small-sized sub-injection unit 30 is mounted to an injection molding apparatus main body 2 including a main injection unit 3.
As shown in fig. 1, the injection molding apparatus main body 2 includes: a main injection unit 3 for a main material; a fixed disc (die mounting disc) 4 and an end plate 8 which are fixedly arranged on the base 11; a movable platen (die attachment platen) 5 provided between the fixed platen 4 and the end plate 8 so as to be able to advance and retreat with respect to the fixed platen 4; a fixed die (mold) 6 mounted on the fixed disk 4; a movable mold (die) 7 mounted on the movable platen 5; 4 connecting rods 9 which are arranged at four corners of the fixed disc 4, the movable disc 5 and the end plate 8 in a penetrating way; and a mold clamping mechanism 10 provided between the movable platen 5 and the end plate 8 for advancing and retreating the movable platen 5 with respect to the fixed platen 4.
A through hole penetrating from the back surface to the front surface (mold mounting surface) is formed in the stationary platen 4, and a resin supply port 6a for a main injection unit is formed in the fixed mold 6 at a position corresponding to the through hole of the stationary platen 4. The nozzle portion of the main injection unit 3 is connected to the resin supply port 6a of the fixed mold 6 via a through hole of the fixed disk 4, and is configured to be able to inject molten resin as a main material into the main cavity portions 6b (cavities) of the fixed mold 6 and the movable mold 7. In the injection molding apparatus of the present embodiment, various known structures can be optionally employed for the main injection unit 3, the fixed platen 4, the end plate 8, the movable platen 5, the movable platen 7, the tie bar 9, and the mold clamping mechanism 10, and therefore detailed descriptions thereof will be omitted.
As shown in fig. 1 and 2, the fixed mold 6 includes: a manifold block 24 mounted on the fixed platen 4 via a mold mounting plate 22; a cavity block 26 having a cavity surface capable of forming the main cavity portion 6b with the movable mold 7; and an injection-molding-device mounting plate 20 provided between the manifold block 22 and the cavity block 26.
As shown in fig. 2, main injection resin flow passages 24a, 20a, 26a for flowing the molten resin injected and filled from the main injection unit 3 toward the cavity are formed in the manifold block 24, the mold injection device attachment plate 20, and the cavity block 26, respectively, and a main gate 26b (gate) of the main injection resin flow passage 26a is formed in the cavity block 26. The main injection resin flow paths 24a, 20a, and 26a are so-called hot runners whose heating temperatures are controlled, and are configured to be able to hold molten resin injected and filled from the main injection unit 3 in a molten state. In the injection molding apparatus of the present embodiment, various known hot runners can be used as the main injection resin flow paths 24a, 20a, and 26a, and therefore, detailed description thereof will be omitted.
The mold injection device attachment plate 20 is provided with, in addition to the main injection resin flow path 20 a: a plasticizing screw shaft housing portion 20b for housing a plasticizing screw shaft 35a, described later, of the sub-injection unit 30; and a sub-injection resin flow path (injection resin flow path) 20c that causes the molten resin plasticized in the plasticizing screw shaft housing portion 20b to flow toward an expanded cavity portion 6c (cavity) described later, and a sub-gate 26c (gate) is formed in the cavity block 26 at a position corresponding to the expanded cavity portion 6 c.
The plasticizing screw shaft housing portion 20b and the sub-injection resin flow path 20c are both so-called hot runners whose heating temperatures are controlled. In the present embodiment, the plasticizing screw shaft housing portion 20b and the sub-injection resin flow path 20c are formed of separate cylindrical members embedded in holes formed in the mold injection device attachment plate 20, and are configured to be replaceable with another hot runner having a different inner circumferential diameter or the like in accordance with the type of resin material, the outer diameter, pitch, or the like of the plasticizing screw shaft 35a of the sub-injection unit 30, and the like. In the present embodiment, by constituting the hot runner by the replaceable separate member as described above, it is possible to achieve the correspondence with various resin materials by replacing the plasticizing screw shaft 35a of the sub-injection unit 30, and also to achieve the correspondence with various resin materials by replacing the hot runner. In the injection molding apparatus of the present embodiment, various known heating means included in a hot runner can be arbitrarily used as the heating means for the plasticizing screw shaft housing portion 20b and the sub-injection resin flow path 20c, and therefore, a detailed description thereof will be omitted.
The plasticizing screw shaft housing portion 20b is formed in a cylindrical shape having an inner diameter substantially the same as or slightly larger than the outer diameter of the plasticizing screw shaft 35a of the sub-injection unit 30, and is formed such that one end portion thereof opens on the side surface of the mold injection device attachment plate 20 and the other end portion thereof communicates with the sub-injection resin flow path 20 c. In the present embodiment, the plasticizing screw shaft housing portion 20b is formed in a direction intersecting the mold opening and closing direction of the movable mold 7 from the side surface of the mold injection device attachment plate 20 toward the center portion of the mold injection device attachment plate 20. The plasticizing screw shaft 35a of the sub-injection unit 30 is disposed in the plasticizing screw shaft housing portion 20b so as to be rotatable about the axis and slidable in the axial direction, and the plasticizing screw shaft housing portion 20b is configured to plasticize (melt) the resin material together with the plasticizing screw shaft 35 a. Fig. 2 shows the plasticizing screw shaft 35a in a state where injection and filling, which will be described later, have been completed. The plasticizing screw shaft housing portion 20b or the sub-injection unit 30 has a hopper (material supply port), not shown, for charging the granular resin material as the sub-material into the plasticizing screw shaft housing portion 20 b. The plasticizing screw shaft housing portion 20b configured as a hot runner is configured to be capable of controlling the heating temperature of a granular resin material supplied from a hopper (material supply port), not shown, while the resin material is flowing in the axial direction by the rotation of the plasticizing screw shaft 35a, in a manner similar to a heating unit such as a belt heater disposed on the outer periphery of a heating drum (heating cylinder) of a typical coaxial screw injection device. In the present embodiment, the side surface of the mold injection device attachment plate 20 includes an upper surface and a lower surface in addition to the right side surface and the left side surface.
The sub-injection resin flow path 20c is formed in a cylindrical shape extending in a direction intersecting the plasticizing screw shaft housing portion 20b, in the present embodiment, in the mold opening and closing direction of the movable mold 7, and has one end portion communicating with the sub-gate 26c of the cavity block 26. A gate valve 21 capable of opening and closing the sub gate 26c is disposed in the sub injection resin flow path 20 c. Since the gate valve 21 can have various known configurations, detailed description thereof will be omitted. Further, although the needle valve is shown in the illustrated example, the needle valve is not limited to this, and various known gate valve mechanisms can be used.
The cavity block 26 is configured to be able to perform the following processes: after the primary molded body is molded in the main cavity portion 6b by the molten resin injected and filled from the main injection unit 3, an expanded cavity portion 6c is formed by various known methods such as movable core and mold replacement, and a secondary molded body is laminated and molded on the primary molded body in the expanded cavity portion 6c by the molten resin injected and filled from the sub injection unit 30.
As shown in fig. 3, the sub-injection unit 30 is a coaxial screw type injection unit of a two-plate system including a fixed frame 32 and a movable frame 33, and is formed to be smaller than the main injection unit 3. Specifically, the sub-injection unit 30 includes: a fixed frame 32; a movable frame 33 provided to be able to advance and retreat with respect to the fixed frame 32; a movable frame driving mechanism 34 for advancing and retreating the movable frame 33 with respect to the fixed frame 32; a cylinder assembly 35 having a plasticizing screw shaft 35a that plasticizes a resin material as a sub-material; and a plasticizing screw drive mechanism 36 that rotates the plasticizing screw shaft 35 a. In addition, in fig. 1, 2, 4 and 5, the sub-injection unit 30 is shown in the form of a rectangular parallelepiped having a protruding portion corresponding to the plasticizing screw shaft 35a for the sake of simplifying the drawing.
As shown in fig. 1 and 2, the fixing frame 32 is fixed to a side surface of the mold injection device mounting plate 20 by fastening means (not shown) such as bolts. On the other hand, the movable frame 33 is supported by the fixed frame 32 in a state slidable with respect to the fixed frame 32 as described later.
As shown in fig. 3, the movable frame driving mechanism 34 includes: an injection motor (not shown) provided on the fixed frame 32; a pair of ball screw nuts 34a embedded in the movable frame 33; a pair of ball screw shafts 34c having one end connected to the fixed frame 32 via a bearing 34b and the other end screwed to the ball screw nut 34 a; a plurality of injection pulleys 34d attached to an output shaft of the injection motor and the pair of ball screw shafts 34 c; and a pulley belt 34e mounted on the plurality of injection pulleys 34 d. The movable frame driving mechanism 34 is configured to: the rotational force of the injection motor is transmitted to the pair of ball screw shafts 34c via the pulley conveyor 34e and the plurality of injection pulleys 34f, and the pair of ball screw shafts 34c are rotated in the forward direction or the reverse direction, whereby the movable frame 33 is advanced and retracted with respect to the fixed frame 32.
The cylinder assembly 35 includes a plasticizing screw shaft 35a, a screw piece 35b is formed in a predetermined region on the distal end side of the plasticizing screw shaft 35a, and the proximal end of the plasticizing screw shaft 35a is coupled to the movable frame 33 via a bearing 35 c. A check ring 35d is provided at the tip end portion of the plasticizing screw shaft 35a, and this check ring 35d prevents a reverse flow occurring when the plasticized molten resin is injected from the plasticizing screw shaft housing portion 20b toward the sub-injection resin flow path 20 c. Since the lock ring 35d may have various known structures, detailed description thereof will be omitted.
The plasticizing screw drive mechanism 36 includes: a plasticizing motor (not shown) provided in the movable frame 33; a plurality of plasticizing pulleys 36a mounted on an output shaft of the plasticizing motor and the plasticizing screw shaft 35 a; and a pulley belt 36b mounted on the plurality of plasticizing pulleys 36 a. The plasticizing screw drive mechanism 36 is configured to: the rotational force of the plasticizing motor is transmitted to the plasticizing screw shaft 35a through the pulley conveyor 36b and the plural plasticizing pulleys 36a, thereby rotating the plasticizing screw shaft 35 a.
The sub-injection unit 30 is not limited to the above description and the illustrated embodiments, and any of various known injection units can be used as long as it is smaller than the main injection unit 3 and can be attached to the mold injection device attachment plate 20.
The injection device attachment plate 20 for a mold and the sub-injection unit 30 having the above-described configuration are configured such that: the resin material charged from the hopper is plasticized (melted) by the shear heat generated by the heating temperature control of the plasticizing screw shaft housing portion 20b as a hot runner and the rotation of the plasticizing screw shaft 35 a. That is, the fixed mold 6 of the present embodiment is configured to: the hot runner on the mold side (plasticizing screw shaft housing portion 20b of the injection device mounting plate 20 for mold) is provided with the function of a heating drum (heating cylinder) of a normal coaxial screw injection unit, that is, the dimensional relationship with respect to the plasticizing screw shaft 35a and the heating temperature control described above. The cylinder assembly 35 is configured to: the movable frame 33 and the plasticizing screw shaft 35a are retreated by the movable frame driving mechanism 34 while the plasticizing screw shaft 35a is rotated by the plasticizing screw driving mechanism 36 to perform metering, and after the metering is completed, the movable frame 33 and the plasticizing screw shaft 35a are advanced from the metering completion position (retreated position) by the movable frame driving mechanism 34 to inject and fill the plasticized molten resin from the plasticizing screw shaft housing portion 20b into the sub-injection resin flow path 20 c.
As shown in fig. 4, the injection device mounting plate 20 for a mold including the above structure is manufactured by the following method: the plasticizing screw shaft 35a of the sub-injection unit 30, which does not include the region where the spiral piece 35b of the heating cylinder is exposed, is inserted into the plasticizing screw shaft housing portion 20b, and the sub-injection unit 30 is integrally formed (fitted) with the injection device attachment plate 20 for mold. The fixed mold 6 is manufactured by the following method: the mold injection device mounting plate 20 integrated with the sub-injection unit 30 is inserted into a normal mold including the mold mounting plate 22, the manifold block 24 having a hot runner (main injection resin flow path 24a), and the cavity block 26 having a gate (main gate 26b) communicating with the hot runner so as to be positioned between the manifold block 24 and the cavity block 26, and a sub-gate 26c is formed in the cavity block 26.
As described above, the mold injection device attachment plate 20 of the present embodiment includes: a side surface of a fixing frame 32 to which a sub-injection unit 30 (coaxial screw type injection device) can be fixed; and a hot runner (plasticizing screw shaft housing portion 20b) that is open on the side surface and that is capable of housing the plasticizing screw shaft 35a, and that is configured to be capable of plasticizing and metering the resin material in cooperation with the plasticizing screw shaft 35a and to be capable of flowing the plasticized resin material toward the cavity.
In this way, since the fixing frame 32 of the sub-injection unit 30 is fixed to the side surface (upper surface, lower surface, left side surface, and/or right side surface) of the mold-use injection device attachment plate 20 of the present embodiment, it is not necessary to interpose the elastic member 122 such as a spring between the sub-injection unit 110 and the mold 100 as in the injection molding device of patent document 1. Therefore, according to the mold injection device attachment plate 20 of the present embodiment, since the sub-injection unit 30 (coaxial screw injection device) can be firmly attached to the fixed mold 6 (mold), there is an advantage that damage and abrasion of the components due to vibration caused by the mold opening and closing operation, the mold clamping operation, the injection filling operation, and the like are less likely to occur, as compared with the injection molding device of patent document 1.
Further, the mold injection apparatus mounting plate 20 of the present embodiment has an advantage that the plasticizing screw shaft housing portion 20b (hot runner) has a function of a heating drum (heating cylinder) of a general coaxial screw injection unit, and thus the length and diameter of the plasticizing screw shaft housing portion 20b can be minimized, and the fixed mold 6 (mold) can be made smaller and restrictions on the arrangement of the cavity are less than those of the injection molding apparatus of patent document 1.
Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes and modifications can be made to the above embodiments.
For example, in the above-described embodiment, the structure in which the mold injection device attachment plate 20 is assembled to the stationary mold 6 has been described, but the structure is not limited to this, and may be configured to be assembled to the movable mold 7', for example, as shown in fig. 5. In this case, it is not necessary to arrange the main injection resin flow path in the mold injection device attachment plate 20 ' as in the above-described embodiment, but the movable mold 7 ' may be configured such that the cavity block, the mold injection device attachment plate 20 ' and the mold attachment plate are combined without arranging a manifold block. Further, the mold injection device attachment plate 20 may be assembled to both the fixed mold and the movable mold.
In the above-described embodiment, the configuration in which 1 plasticizing screw shaft housing portion 20b and 1 sub-injection resin flow path 20c are formed in the mold injection device attachment plate 20 and 1 sub-injection unit 30 is attached has been described as an example, but the present invention is not limited to this, and a configuration may be adopted in which 2 or more plasticizing screw shaft housing portions 20b and 2 or more sub-injection resin flow paths 20c are formed and 2 or more sub-injection units 30, 30 are attached to the mold injection device attachment plate 20' as shown in fig. 5. In fig. 5, the gate valve is not shown.
In the above-described embodiment, the gate valve 21 is disposed in the sub-injection resin flow path 20c, but the present invention is not limited to this, and the gate valve 21 may not be disposed. In this case, the following configuration may be adopted: a structure in which the plasticizing screw shaft housing portion 20b directly communicates with the sub gate 26c of the cavity block 26, excluding the sub injection resin flow path 20c, or a structure in which the plasticizing screw shaft housing portion 20b communicates with the sub gate 26c of the cavity block 26 via an extremely short sub injection resin flow path.
In the above-described embodiment, the fixed mold 6 includes the manifold block 24, the cavity block 26, and the mold injection device attachment plate 20, but the present invention is not limited thereto. For example, the mold may be formed only by the cavity block 26 and the mold injection device mounting plate 20 by incorporating the function of the manifold block 24 into the mold injection device mounting plate 20. Further, the mold may be formed only by the mold injection device mounting plate 20 by incorporating the functions of the manifold block 24 and the cavity block 26 into the mold injection device mounting plate 20.
The mold injection device attachment plate 20 is not limited to the structure incorporated in the injection molding device main body 2 of the horizontal injection molding device type shown in fig. 1, and may be, for example, a structure incorporated in an upper mold and/or a lower mold of an injection molding device having a vertical mold clamping mechanism and an upper mold and/or a lower mold of a press device having the same vertical mold clamping mechanism. The vertical injection molding apparatus and the press apparatus may be of any known configuration, and therefore, a detailed description thereof will be omitted.
In the above-described embodiment, the case where the mold is a two-piece mold including the fixed molds 6 and 6 'and the movable molds 7 and 7' has been described, but the present invention is not limited to this, and a three-piece or more mold in which 1 or more intermediate molds are added to the fixed molds 6 and 6 'and the movable molds 7 and 7' may be used. In this case, the mold injection device attachment plate 20 may be attached to the intermediate mold.
Description of the reference symbols
6: fixed mold (die), 6 b: main cavity portion (cavity), 6 c: expanding cavity portion (cavity), 7': moving die (mold), 20: mold injection device mounting plate, 20 b: plasticizing screw shaft housing (hot runner), 20 c: sub-injection resin flow path (hot runner, injection resin flow path), 21: gate valve, 26 b: main gate (gate), 26 c: sub gate (gate), 30: sub-injection unit (coaxial screw injection device), 32: fixed frame, 35 a: and (3) plasticizing the screw shaft.

Claims (9)

1. An injection device mounting plate for a mold for mounting a coaxial screw type injection device to a mold, the coaxial screw type injection device including a fixed frame and a plasticizing screw shaft rotatable and movable with respect to the fixed frame, the injection device mounting plate for a mold being characterized in that,
the injection device mounting plate for a mold includes: a side surface capable of fixing the fixing frame of the coaxial screw type injection device; and a hot runner that is open on the side surface and is capable of housing the plasticizing screw shaft,
the hot runner is configured to be capable of plasticizing and metering a resin material in cooperation with the plasticizing screw shaft of the coaxial screw type injection apparatus and to be capable of flowing the plasticized resin material toward a cavity of the mold,
at least a portion of the hot runner including a region capable of housing the plasticizing screw shaft is formed of a replaceable cylindrical separate member.
2. The injection device mounting plate for a mold according to claim 1,
the hot runner has: a plasticizing screw shaft housing portion capable of housing the plasticizing screw shaft; and an injection resin flow path communicating with a gate of a cavity of the mold,
the plasticizing screw shaft housing portion is configured such that one end portion thereof opens on the side surface and the other end portion thereof communicates with the injection resin flow path.
3. The injection device mounting plate for a mold according to claim 2,
a gate valve capable of opening and closing the gate is disposed in the injection resin flow path of the hot runner.
4. The injection device mounting plate for a mold according to claim 1,
the mold injection device mounting plate is configured to be disposed continuously with a cavity block having a cavity surface capable of forming at least a part of a cavity of the mold.
5. The injection device mounting plate for a mold according to claim 4,
the injection device mounting plate for a mold is configured to be disposed between a manifold block and the cavity block, the manifold block is mounted on a mold mounting plate,
the mold injection device mounting plate has a main injection resin passage for communicating a main injection resin passage formed in the manifold block with a main injection resin passage formed in the cavity block.
6. The injection device mounting plate for a mold according to claim 1,
the injection device mounting plate for the mold is provided with the coaxial screw type injection device.
7. A mold is characterized in that a mold body is provided,
the mold includes the injection device mounting plate for a mold according to claim 1.
8. The mold according to claim 7,
the mold further comprising a cavity block having cavity surfaces capable of forming at least a portion of a cavity of the mold,
the mold injection device mounting plate is configured to be arranged continuously with the cavity block.
9. The mold according to claim 8,
the mold further includes a manifold block mounted to the mold mounting plate,
the injection device mounting plate for a mold is disposed between the manifold block and the cavity block,
a main injection resin flow passage that flows the molten resin injected and filled from the main injection unit toward the cavity is formed in each of the manifold block, the mold injection device attachment plate, and the cavity block.
CN201780044134.5A 2016-08-22 2017-06-15 Injection device mounting plate for mold and mold Active CN109476060B (en)

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JP2016-161693 2016-08-22
JP2016161693A JP6202163B1 (en) 2016-08-22 2016-08-22 Mold injection device mounting plate and mold
PCT/JP2017/022111 WO2018037681A1 (en) 2016-08-22 2017-06-15 Injection device mounting plate for mold and mold

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Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669137A (en) * 1979-11-12 1981-06-10 Mitsui Petrochem Ind Ltd Laminated structure molding method
JPH02178012A (en) * 1988-12-29 1990-07-11 Nissei Plastics Ind Co Injection mold assembly
JPH04244821A (en) * 1991-01-31 1992-09-01 Sekisui Chem Co Ltd Injection molding equipment
JP2998553B2 (en) * 1994-02-22 2000-01-11 豊田合成株式会社 Injection molding machine
JP3274942B2 (en) * 1994-12-22 2002-04-15 株式会社日本製鋼所 Composite molding method and injection molding machine
JP2003001668A (en) 2001-06-26 2003-01-08 Kinugawa Rubber Ind Co Ltd Molding apparatus for multilayered molded object
JP3789787B2 (en) * 2001-08-17 2006-06-28 日精樹脂工業株式会社 Injection molding equipment
JP2004001403A (en) * 2002-03-27 2004-01-08 Canon Inc Injection molding machine, injection molding method and injection-molded product
ATE435731T1 (en) * 2005-07-21 2009-07-15 Patents Expl Company B V INTEGRATED INJECTION MOLDING UNIT FOR PRODUCING PLASTIC OBJECTS
JP2007075999A (en) * 2005-09-09 2007-03-29 Sumitomo Heavy Ind Ltd Injection molding machine and injection molding system
JP2009143015A (en) * 2007-12-11 2009-07-02 Denso Corp Mold device
JP5747665B2 (en) * 2011-06-06 2015-07-15 宇部興産機械株式会社 Injection mold
JP5855539B2 (en) * 2012-07-02 2016-02-09 小島プレス工業株式会社 Two-color molded product manufacturing apparatus and manufacturing method

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KR102155653B1 (en) 2020-09-14
JP6202163B1 (en) 2017-09-27

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