JP4996860B2 - Injection molding equipment - Google Patents

Description

  The present invention belongs to a resin injection molding apparatus.

  As an example of an injection mechanism part in a molding machine, there is an injection molding apparatus shown in Patent Document 1. The injection molding apparatus described in Patent Document 1 is shown in FIG. An injection molding apparatus 100 shown in FIG. 16 includes an injection mechanism unit 101 and a mold clamping mechanism unit 102. The injection mechanism unit 101 includes an injection cylinder 103, an injection plunger 104, and a nozzle 105 provided at the tip of the injection cylinder 103. The injection cylinder 103 is supported by a jacket 107 supported by the spacer block 106 so as to be movable in the vertical direction.

  The injection plunger 104 is connected to the injection hydraulic cylinder 110. A hopper 111 is connected to the injection hydraulic cylinder 110 through a pipe line. A resin material to be supplied to the injection cylinder 103 is stored in the hopper 111.

  The mold clamping mechanism 102 includes a mold 112, an intermediate plate 118, and a fixed side platen 114. A mold sprue 113 is formed on the intermediate plate 118. A spacer block 106 is disposed on the stationary side platen 114.

  When injection molding is performed by the injection molding apparatus 100 described above, the resin material stored in the hopper 111 is supplied into the injection cylinder 103 through a pipe line. Since the inside of the injection cylinder 103 is heated to a high temperature, the resin material is melted when the injection cylinder 103 is filled. In this state, the injection plunger 104 that can be moved up and down moves downward, and the injection plunger 104 slides downward in the injection cylinder 103 to perform nozzle touch. At the time of nozzle touch, the injection cylinder 103 moves downward from the normal position and fits into a hole provided in the fixed platen 114, and the tip of the nozzle 105 is provided in the fixed platen 114. Fit into the hole. By doing so, the injection cylinder 103 and the nozzle 105 are positioned. From there, the molten resin is filled into the mold 112, and pressure is applied to form the molten resin as in the mold 112. Thereafter, the molten resin is cooled and solidified.

  In addition, as in Patent Document 2 and Patent Document 3, in a general molding machine, the nozzle is pressed against the mold by a force that overcomes the resin pressure by moving the injection cylinder back and forth with respect to the mold. Done. Examples of the drive unit that moves forward and backward include an electric type that performs operation control through a motor, a pulley, and a belt, and a hydraulic type that performs operation control using a cylinder, a pump, and piping by hydraulic pressure.

JP 2005-81814 A JP 2001-225369 A JP 2003-39482 A

  The above injection mechanism requires maintenance such as repair, replacement, and evaluation of parts due to metal wear, deterioration, and fatigue. In that case, the injection cylinder and the nozzle are removed from the injection molding apparatus and disassembled. However, the injection molding apparatus is accompanied with complicated parts such as a motor, a pump, and a hopper, and the injection molding apparatus is complicatedly integrated with piping and wiring. Therefore, it is necessary to remove complicated parts such as a motor, a pump, and a hopper when maintaining the injection cylinder and nozzle. In addition, in order to remove such parts, it was necessary to remove piping and wiring.

  Therefore, in order to remove the parts such as the injection cylinder and the nozzle from the injection molding apparatus, skilled knowledge and technology are required, and it is difficult to perform maintenance of the parts as necessary. Furthermore, when assembling the injection cylinder and nozzle into the injection molding apparatus, after attaching them to the injection molding apparatus, complex parts such as motors, pumps, and hoppers are attached to the injection molding apparatus, and piping and wiring are restored. Need to do. For this reason, a lot of time is wasted for maintenance, affecting the examination, evaluation, and productivity of the apparatus. Further, the injection cylinder and the nozzle are heated by the heater disposed in the cylinder and the heater disposed in the nozzle, and it has been difficult for an operator to handle them.

  Immediately after the product is produced by injection molding, the parts around the injection cylinder and nozzle become hot. Therefore, when designing an injection molding device, thermal expansion between parts will be taken into account, and sufficient heat retention time and test operation are required at the start of injection molding or immediately after replacement of the injection cylinder and nozzle. Necessary. Therefore, considerable time is required for replacement of the injection cylinder and the nozzle, and it is costly to perform maintenance of the injection molding apparatus and its parts, which hinders flexible production. In addition, a lot of time is wasted for cooling, which hinders flexible production.

  In addition, the injection molding device has a complicated structure, generates a large force in units of tons, and is controlled to a high temperature, so that it cannot be maintained unless it is a person with specialized knowledge, and flexible production is possible. It will be a hindrance.

  In addition, replacement of the injection cylinder and nozzle takes a considerable amount of time and is difficult, so even if it becomes necessary to perform injection molding of a different type of resin material during production, the injection cylinder must be replaced with another type. It was difficult to perform injection molding by replacing the resin material. Therefore, there is a case where injection molding is performed by replacing the contents of the hopper without replacing the injection cylinder. In this case, different types of resins are mixed with each other. Moreover, since the resin material already filled must be discarded and replaced, unnecessary garbage is generated, which is uneconomical. Moreover, additional time was required to change the resin material.

  The present invention has been made in view of the above-described problems, and its object is to provide an injection molding apparatus that can improve the maintainability of the injection mechanism, facilitate disassembly and assembly, and build a flexible production system. is there.

In order to solve the above-described problems and achieve the object, an injection molding apparatus according to the present invention includes an injection cylinder that can inject a molding material from a nozzle, a support member that supports and fixes the injection cylinder, and the nozzle. An injection molding apparatus comprising a stationary platen provided with nozzle positioning holes that can be inserted from the flow direction of the molding material, wherein the injection cylinder and the nozzle are integrally coupled to form an injection unit, and the stationary platen Has a groove for avoiding a collision between the nozzle and the fixed platen when the injection unit is attached and detached, and the support member is fixed to the fixed platen, and is attached to the injection unit . when releasing the fixing, as well as permit movement of the injection unit in the flow direction and the reverse direction, the injection unit By allowing a tilt of the injection unit with respect to the flow direction by passing through the groove to permit removal of the injection unit.

  According to the injection molding apparatus of the present invention, it is possible to remove an injection unit including parts that require maintenance such as a nozzle and an injection cylinder in an injection mechanism section by simply removing several parts without disassembling a complicated mechanism. It becomes possible. Specifically, the injection unit can be removed from the injection molding apparatus by simply removing the injection cylinder holder and the stopper. Also, it is not necessary to assemble complicated mechanisms such as a motor, a pump, and a hopper in assembling, and it is not necessary to perform piping and wiring work again. Therefore, it is possible to provide an injection molding apparatus with greatly improved maintenance performance, which can significantly reduce the time required for replacement of components such as nozzles and injection cylinders, does not require special knowledge and techniques for replacement.

  Further, the injection cylinder can be fixed when the members come in linear contact with each other by a support member, a fixed platen, and a stopper provided on the fixed platen. As a result, even if the injection mechanism is controlled at high temperature due to heat for melting the resin material in the injection cylinder or trouble during production, the heat transfer area is small, so heat transfer to the members around the injection cylinder It can be suppressed. Thus, disassembly and assembly are possible even at high temperatures, and production can be flexibly handled. Furthermore, if an injection unit storing different kinds of resin materials is prepared separately, it is effective not only for maintenance but also for changing the resin by simply replacing the injection unit. Therefore, it is possible to replace the resin in a short time, there is no mixing of different types of resins, no unnecessary dust is generated, and there is no need to replace the resin material for a long time, so it is flexible for production. It becomes possible to respond.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.
(First embodiment)
The injection molding apparatus 1 according to the present embodiment includes an injection mechanism unit 2 and a mold clamping mechanism unit (not shown) located below the injection mechanism unit 2. As the mold clamping mechanism, a conventionally known one can be appropriately employed. The injection molding apparatus 1 of this embodiment is an application example as a vertical molding machine, and FIG. 1 is a view of the injection mechanism portion 2 of the injection molding apparatus 1 as viewed from the front. FIG. 2 is an arrow view of the injection molding apparatus 1 of FIG. 1 viewed in the direction of arrow II.

  The hopper 3 is a container having a shape like a bottle, in which a resin material to be injection-molded is stored. The injection cylinder 4 has a cylindrical shape, and an injection cylinder upper male screw 8 as shown in FIG. Nuts 9 and 10 (see FIG. 4) are screwed onto the injection cylinder upper male screw 8. A fixed platen 6 is installed below the injection cylinder 4, and a fixed platen circular hole 11 (see FIG. 7) in which a nozzle 5 formed in the lower part of the injection cylinder 4 can be pressed against the fixed platen 6. ) Is provided.

  The injection cylinder 4 is fitted into the fixed platen circular hole 11 as shown in FIG. 7, and is pressed and fixed by the stopper 12 as shown in FIG. The stopper 12 is fixed to the stationary platen 6 by a stopper bolt 13. A nozzle support member 14 (see FIG. 2) that is formed in a tapered shape and positions and supports the nozzle 5 is provided below the fixed platen 6. By fitting the tip of the nozzle 5 into the nozzle positioning hole 15 of the nozzle support member 14, the nozzle 5 can be positioned with high accuracy. A nozzle heater 16 is provided around the nozzle 5 in the fixed platen 6 as shown in FIG. At a position facing the side of the injection cylinder 4, a support member 17 and a cylinder retainer 18 for fixing it are installed. Further, an injection motor 7 is installed at a position shifted upward from the side of the injection cylinder 4 as shown in FIG.

  A reduction gear 19 is provided above the injection motor 7, and a small pulley 20 is provided on the output shaft thereof. A belt 39 is bridged between the small pulley 20 and the large pulley 21. An injection ball screw 22 and an injection ball screw guide 23 are installed below the large pulley 21, and the injection ball screw guide 23 bridges two poles 24 extending below the large pulley 21. A plunger 25 is installed below the injection ball screw 22 so as to be movable with respect to the injection cylinder 4. The plunger 25 is connected to the injection ball screw guide 23 via a plunger holder 26 by a plunger holder bolt 27 (see FIG. 3). The injection ball screw guide 23 has a structure in which power is transmitted from the injection ball screw 22 along the pole 24 and is driven up and down.

  As shown in FIG. 4, the injection cylinder 4 includes a spring 29 that faces the lower surface of the support member 17 supported by a spacer 28 (see FIG. 2) on the fixed platen 6. The injection cylinder upper male screw 8 provided at the upper part of the injection cylinder 4 is fastened with nuts 9 and 10 having an internal screw structure on the inner surface. As a result, as shown in FIG. 6, the support member 17 is sandwiched between the nuts 9 and 10 and the injection cylinder 4 in the flow direction of the molding material. The injection cylinder 4 can be raised or lowered with respect to the support member 17 in accordance with the rotation of the nuts 9 and 10. Therefore, the injection cylinder 4 is supported so as to be movable and adjustable in the flow direction of the molding material. Further, since the spring 29 is sandwiched and supported between the injection cylinder 4 and the support member 17, when the injection cylinder 4 moves to a desired position, the distributed load on the injection cylinder 4 by the support member 17. It becomes the structure which takes evenly.

  In addition, as shown in FIG. 4, nuts 9 and 10 are provided with several holes 9A and 10A so that rod-shaped ones can be inserted and rotated easily. The movement of the injection cylinder 4 can be adjusted.

Further, by loosening the nuts 9 and 10, the compressive force applied to the spring 29 compressed between the support member 17 and the injection cylinder 4 is gradually reduced. When the nuts 9 and 10 are further loosened, the spring is not subjected to any compression force. Therefore, when attaching / disassembling the injection cylinder 4 and the nozzle 5, no extra force is applied to the injection cylinder 4, and the operation can be performed easily. The injection cylinder 4 is fixed in a plane perpendicular to the flow direction of the molding material by the injection cylinder 4 being sandwiched between the support member 17 and the injection cylinder retainer 18. The injection cylinder retainer 18 is fixed to the support member 17 by an injection cylinder retainer bolt 30. A cylinder heater 31 is installed around the injection cylinder 4. Both the cylinder heater 31 and the nozzle heater 16 are supplied with electricity by the heater wiring 32 and controlled at a predetermined temperature according to the resin material to be used. The injection mechanism unit 2 is supported and fixed by a spacer 28 erected from the fixed platen 6 and a pole 24 through a support member 17. (See Figure 2)
Further, an assembly of members which are arranged from the plunger 25 to the nozzle 5 along the flow direction of the molding material and exchanged according to the present invention is referred to as an injection unit 33. The injection unit 33 of the present embodiment includes the plunger 25, the plunger holder 26, the nuts 9 and 10, the injection cylinder 4, the spring 29, the cylinder heater 31, the nozzle heater 16, the nozzle 5, and the like shown in FIG.

  FIG. 8 is an enlarged view of portions of the support member 17 and the support member clearance 34. The support member 17 is formed with a U-shaped support member relief 34 into which the injection unit 33 including the injection cylinder 4 is detachably fitted.

  9 and 10 show a fitting state in which the injection cylinder 4 in the injection unit 33 is sandwiched between the support member 17 and the injection cylinder holder 18. After the injection cylinder 4 is fitted into the support member relief 34 of the support member 17, the injection unit 33 including the injection cylinder 4 is sandwiched by the injection cylinder holder 18 so as not to move in the direction perpendicular to the flow direction. The injection cylinder 4 is supported by four first contact portions 46 that come in linear contact with the inner surface of the support member relief 34 as shown in FIG. These first contact portions 46 are linear portions that are located on the outer peripheral surface of the cylindrical portion of the injection cylinder 4 and extend in the vertical direction in FIG. 9. Thereby, the movement to a flow direction is permitted, suppressing heat transfer. The term “linear” as used herein refers to a line portion that theoretically has no area, such as a portion where the outer peripheral surface of the cylinder and the plate are in contact by line contact. Here, the cylindrical injection cylinder 4 is the first contact portion 46 in contact with the support member 17 and the injection cylinder holder 18. The first contact portion 46 is formed to extend in the flow direction of the molding material.

  As shown in FIG. 13, the support member 17 and the injection cylinder presser 18 are in linear contact with the four first contact portions 46 in the injection cylinder 4, so that the heat transfer area is small and heat transfer is performed. The amount is also small. This prevents heat from the injection cylinder 4 from propagating to other parts of the apparatus.

  FIG. 11 is an enlarged perspective view of fixed platen reliefs 35A, 35B, and 36 formed as stepped portions, respectively. As will be described later, the fixed platen 6 is provided with fixed platen reliefs 35A, 35B, and 36 formed as stepped portions so that the injection unit 33 including the injection cylinder 4 and the nozzle 5 can be tilted and taken out. . The stopper 12 presses the injection cylinder 4 in a direction perpendicular to the flow direction of the molding material, thereby ensuring the lateral support of the injection cylinder. Further, the pressing to the fixed platen 6 by the stopper 12 is performed by the second contact portion 47 that comes in linear contact as shown in FIG. 14 in consideration of heat transfer. The fixed platen escape 36 is mainly an escape of the heater wiring of the injection unit 33 or the like. The fixed platen reliefs 35A and 35B are formed as steps on the upper opening edge of the fixed platen circular hole 11, so that when the injection unit 33 is tilted, the injection unit 33 and the fixed platen 6 do not collide smoothly. The space is taken into consideration so that it can be taken out. The nozzle support member fitting hole 41 is a hole in which the nozzle tip portion 40 is fitted and positioned.

  FIG. 12 is a perspective view showing a connection state between the injection cylinder 4 and the stationary platen 6. The relationship between the wiring from the nozzle heater 16 and the fixed platen relief 36 and the relationship between the injection cylinder 4 and the stopper 12 are shown.

  As shown in FIG. 14, the injection cylinder 4 is fixed to the fixed platen 6 by the stopper 12. FIG. 14 is a plan view in which the injection cylinder 4 is pressed against and supported by the stopper 12 in a state of being in contact with the fixed platen circular hole 11.

  Further, the injection cylinder 4 may be positioned with respect to the flow direction of the molding material by the stopper 12. As described above, the injection cylinder 4 is pressed against the fixed platen circular hole 11 by the second contact portion 47 and supported by the stopper 12. Since the injection cylinder 4 is supported by a small amount of contact, the amount of heat transfer is small and the heat of the injection cylinder 4 is prevented from propagating to other parts of the apparatus. Further, since the propagation of heat to the periphery of the injection cylinder 4 is small, even if the temperature of the injection unit 33 is controlled at a high temperature, the injection mechanism unit 2 in the injection molding apparatus 1 can be ensured by ensuring countermeasures against high temperatures by a work gloves or the like. Can be dismantled.

  Since the injection unit 33 including the injection cylinder 4 and the nozzle 5 is integrally formed and can be removed, the removal of the frequently removed parts in the injection molding apparatus 1 can be completed only by removing one member. As a result, it is possible to save time and labor when removing parts during maintenance.

  Next, the operation of the injection molding apparatus 1 will be described.

  The hopper 3 shown in FIG. 1 stores a resin material inside, and supplies the material to the injection cylinder 4 via the hopper joint 37 and the support member 17 with the material feed pin 38.

  Since the injection cylinder 4 is heated by the cylinder heater 31 and the nozzle heater 16 to a high temperature, the resin material is melted when the resin material is supplied into the injection cylinder 4. Then, when power is generated by the rotation of the injection motor 7 shown in FIG. 2, the power is increased by the speed reducer 19 and transmitted to the small pulley 20, the belt 39, and the large pulley 21. Then, the rotational power transmitted to the large pulley 21 is converted into power in the vertical direction (flow direction of the molding material) by the injection ball screw 22. Thereafter, power is transmitted from the injection ball screw 22 shown in FIG. Power is transmitted to the plunger 25 and slides downward in the injection cylinder 4 to apply pressure to the molten resin in the injection cylinder 4 and send the resin to the mold through the mold sprue.

  3, 4, and 5 are front views of the injection molding apparatus 1, showing a method of disassembling the injection mechanism unit 2. 6 and 7 are perspective views showing the state of dismantling. Hereinafter, the disassembly method will be described in detail.

  When disassembling, first, as shown in FIG. 3, the nozzle support member 14 fitted to the nozzle tip 40 of the nozzle 5 is removed. Next, the plunger holder bolt 27 connecting the plunger holder 26 to the injection ball screw guide 23 is removed. The plunger 25, which is no longer supported, falls into the injection cylinder 4 together with the plunger holder 26.

  Next, as shown in FIG. 4, the nuts 9 and 10 at the top of the injection cylinder 4 are loosened and moved to the top of the injection cylinder upper male screw 8. When the nuts 9 and 10 are rotated, a rod-like object may be inserted and rotated using holes or the like provided in the nuts 9 and 10. When the nuts 9 and 10 are loosened, the compressive force in the flow direction of the molding material applied to the spring 29 is weakened. In a state where the force from the spring 29 against the support member 17 is weakened, the injection cylinder holding bolt 30 is loosened to remove the injection cylinder holding 18 as shown in FIG. Next, the stopper 12 holding the lower part of the injection cylinder 4 is disassembled as shown in FIG. 4 by loosening the stopper bolt 13.

  Then, as shown in FIG. 5, the injection unit 33 including the injection cylinder 4 and the nozzle 5 is removed. On the inner wall of the fixed platen 6, a space necessary for tilting the injection unit 33 when removing the injection unit 33 is secured by forming fixed platen reliefs 35 </ b> A and 35 </ b> B and fixed platen reliefs 36 that are step portions. . As shown in the figure, first, the injection unit 33 is lifted slightly in the direction opposite to the flow direction of the resin material at the top of FIG. Thereafter, using the fixed platen reliefs 35A and 35B formed as stepped portions, the injection unit 33 is inclined and tilted obliquely in a direction opposite to the direction in which the support member 17 is present when viewed from the injection unit 33. Then, while letting the wirings escape to the fixed platen escape 36, the injection unit 33 is pulled out as it is on the extended line in the direction in which the injection unit 33 is inclined, and the injection unit 33 is removed obliquely above. In addition, it is preferable that the associated connectors such as the cylinder heater 31, the heater wiring 32, and the nozzle heater 16 that are the cables of the injection mechanism section 2 are removed in advance.

  FIG. 7 is a perspective view when the disassembly is completed, and shows a state where the injection unit 33 is taken out obliquely upward. The injection unit 33, which is a main maintenance part, can be removed without moving or disassembling complicated drive units such as the injection motor 7, the speed reducer 19, and the ball screw 22. Further, if another injection unit 33 in which another type of resin material is stored is prepared in advance, it is possible to cope with a change in resin by simply replacing the injection unit 33.

  Next, a method for attaching the injection unit 33 will be described.

  The attachment of the parts above the injection cylinder 4 to the injection molding apparatus is performed by sequentially performing the disassembly method in reverse order from FIG. 8 to 10 show a support method when the injection unit 33 is attached to the support member 17. FIG. 8 shows the support member 17 before being attached. First, the injection cylinder 4 is assembled into the support member 17 as shown in FIG. 9, the injection cylinder 4 is pressed by the injection cylinder holder 18 and the injection unit 33 is supported by the injection cylinder holding bolt 30 as shown in FIG. For illustration, in FIGS. 9 and 10, the nuts 9 and 10 have been removed.

  Further, a method of supporting the injection unit 33 with respect to the fixed platen 6 will be described with reference to FIG. 11 which is a perspective view and FIG. 14 which is a plan view. When assembling, the stopper bolt 13 is loosened with the injection unit 33 not attached, the stopper 12 is removed, and the injection unit 33 is inserted into the nozzle support member fitting hole 41. At that time, the injection unit 33 is inserted so as to be pressed against the fixed platen circular hole 11. Then, the stopper 12 is attached to the fixed platen 6 using the stopper bolt 13, and the injection cylinder 4 is held by the stopper 12 and fixed. By fixing in this way, the support of the injection cylinder 4 with respect to the fixed platen 6 by the stopper 12 can be removed simply by removing the stopper bolt 13. Thereby, the injection unit 33 can be easily removed in conjunction with the removal of the injection cylinder retainer 18 from the support member 17.

(Second Embodiment)
FIG. 15 shows a method of fixing the injection cylinder 4 with the support member 17 and the injection cylinder retainer 43 in the second embodiment of the present invention. The injection cylinder holder 43 is formed in a shape having a valley 44. Therefore, when the injection cylinder 4 is positioned, the injection cylinder presser 43 is pressed against the support member 17 and the injection cylinder 4 is fixed while the valley portion 44 positions the injection cylinder 4. Further, the injection cylinder 4 is supported by the support member 17 only by the third contact portions 48 at three positions with respect to the injection cylinder holder 43 and the support member 17. Since the injection cylinder 4 is fixed to the injection cylinder holder 43 and the support member 17 only by the third contact portions 48 at three locations, the heat transfer area is further reduced and the amount of heat transfer is small. . Therefore, the heat which injection cylinder 4 has is further prevented from propagating to other parts of the device.

(Other embodiments)
The injection cylinder holder and the support member may have any shape as long as they can be positioned by contacting the injection cylinder with the injection cylinder. In the first and second embodiments, the injection cylinder retainers 18 and 43 are fixed to the separated support member 17 by the injection cylinder retainer bolt 30. It may be fixed by a method. Further, the injection cylinder holder and the support member 17 may be connected by a hinge, and may be fixed using a bolt or another fixing tool at the time of fixing. Further, in order not to transfer the heat from the injection cylinder 4 to the surrounding members, the materials of the support member 17, the injection cylinder pressers 18 and 43, the stopper 12, and the fixed platen 6 that are in contact with the injection cylinder 4 are heat It is preferable that it is made of a material that is difficult to convey. Moreover, in said 1st Embodiment and 2nd Embodiment, the injection unit 33 containing the injection cylinder 4 is supported by the linear contact part regarding the direction perpendicular | vertical with respect to the flow direction of a molding material. It was. However, if the heat may be diffused to the devices around the injection unit 33, the support may not be performed by making contact with all the lines, but the injection unit 33 may be supported by some surface contact. . If the injection unit 33 is supported by surface contact at any location, the injection unit 33 is stably supported. In the present embodiment, the vertical molding machine has been described, but a horizontal molding machine may be used.

In the injection molding apparatus of the 1st Embodiment of this invention, it is the figure which looked at the injection part from the front. It is the arrow line view which looked at the injection part of the injection molding apparatus of FIG. 1 in the direction of arrow II. FIG. 2 is a detailed view of an initial stage of disassembly when an injection unit in FIG. 1 is viewed from the front. FIG. 2 is a detailed view of a middle stage of dismantling when an injection unit in FIG. 1 is viewed from the front. FIG. 2 is a detailed view at the time of completion of disassembling when an injection unit in FIG. 1 is viewed from the front. It is a perspective view of the injection | emission part of FIG. It is a perspective view at the time of completion of disassembly of the injection part in FIG. It is a perspective view of the principal part of the supporting member in FIG. It is a perspective view in the middle of attachment of the injection unit with respect to the support member of FIG. It is the figure seen from diagonally upward in the expanded three-dimensional figure which the perspective view hold down at the time of the completion of attachment of the injection unit with respect to the support member of FIG. 9 fitted. FIG. 8 is a three-dimensional enlarged view of the fixed platen relief of FIG. 7 with a stopper attached, as viewed obliquely from above. It is the figure seen from diagonally upward in the three-dimensional enlarged view which showed fitting with the fixed platen escape of FIG. 6, and the injection unit. It is the figure showing the contact part detail of the supporting member of FIG. 10, and the injection cylinder, and is the figure seen from the apparatus upper direction. It is the figure showing the contact part detail with the fixed platen of FIG. 12, an injection cylinder, and a stopper, and is the figure seen from the apparatus upper direction. It is a figure which shows the 2nd Embodiment of this invention, and is the figure which looked at the contact part detail of the supporting member, the injection cylinder, and the injection cylinder holder from the apparatus upper direction. It is the figure which looked at the injection molding apparatus of the prior art example from the front.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection molding apparatus 2 Injection mechanism part 4 Injection cylinder 5 Nozzle 6 Fixed platen 11 Fixed platen circular hole 12 Stopper 15 Nozzle positioning hole 17 Support member 18 Injection cylinder presser 33 Injection unit 35, 36 Fixed platen escape

Claims (7)

An injection cylinder capable of injecting a molding material from a nozzle, a support member for supporting and fixing the injection cylinder, and a fixed platen provided with a nozzle positioning hole through which the nozzle can be inserted from the flow direction of the molding material. In injection molding equipment,
The injection cylinder and the nozzle are integrally coupled to form an injection unit;
The fixed platen has a groove for avoiding a collision between the nozzle and the fixed platen when the injection unit is attached and detached,
The support member is fixed to the stationary platen, when releasing the fixation to the injection unit, thereby allowing movement of the injection unit in the flow direction and the reverse direction, the injection unit the groove An injection molding apparatus , wherein the injection unit is allowed to be removed while allowing an inclination of the injection unit with respect to the flow direction by passing . The injection unit and the support member are incorporated in an injection mechanism unit,
2. The injection molding apparatus according to claim 1 , wherein the fixed platen is incorporated in a mold clamping mechanism portion located downstream of the injection mechanism portion in the flow direction of the molding material. An injection cylinder holder detachable from the support member;
The injection cylinder retainer, when mounted on the support member, an injection molding apparatus according to claim 1 or 2, characterized in that pressing the said injection cylinder relative to the support member. The injection molding apparatus according to claim 3 , wherein the support member and the injection cylinder retainer are in linear contact with an outer peripheral surface of the injection cylinder. Wherein the support member, an injection molding apparatus according to any one of claims 1 to 4, characterized in that it comprises a positioning member for adjustably positioned along the injection unit to the flow direction. Said fixed platen, an injection molding apparatus according to any one of claims 1 to 5, characterized in that it comprises a stopper for positioning with respect to the vertical direction said injection cylinder relative to the direction of flow. The injection molding apparatus according to claim 6 , wherein the stopper is in linear contact with the outer peripheral surface of the injection cylinder.

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