JP2010221623A - Vertical injection molding machine - Google Patents

Abstract

The present invention provides a vertical injection molding machine that is easy to perform maintenance and inspection of an injection nozzle without being limited as much as possible to the position of the injection nozzle that is moved up and down.
A holding plate 13 to which an upper die 10 is attached, a turntable 11 to which a lower die 12 forming a cavity with the upper die 10 is attached, and an upper die 10 and a lower die 12 are provided. An injection nozzle 6 for injecting a molten resin is provided in the cavity that is closed, and a working recess 17 is formed by being connected to a through hole 16 formed in a holding plate 13 through which the injection nozzle 6 is inserted. As a result, even when the injection nozzle 6 attached to the tip of the injection unit 3 is inserted into the through hole 16, a hand or a tool is inserted through the space formed by the working recess 17 and the through hole 16, and the injection is performed. Maintenance / inspection work of the tip of the nozzle 6 can be performed.
[Selection] Figure 2

Description

  The present invention relates to a vertical injection molding machine that molds a mold by opening and closing a mold in the vertical direction, and in particular, easily maintains an injection nozzle that injects molten resin into a mold that is opened and closed in the vertical direction. -Related to vertical injection molding machines that can be inspected.

  Conventionally, by rotating the turntable, each of the two lower molds attached to the turntable is moved to a position where the mold can be opened and closed with respect to one upper mold, and the mold is opened and closed in the vertical direction. A so-called two-station type vertical injection molding machine is used. In a vertical injection molding machine such as a so-called two-station system that clamps an upper mold and a plurality of lower molds, the lower mold is clamped during a mold clamping process for molding a molded body. Assemble the metal parts for insert molding to the lower mold located on the opposite side of the mold, rotate the turntable to a predetermined position after the assembly, and the lower mold and the upper mold assembled with the metal parts A manufacturing method has been adopted in which a metal insert part and a resin are integrally molded by clamping the mold.

  FIG. 5 is a cross-sectional view showing the main part of the vertical injection molding machine related to the above-described prior art. FIG. 5 (a) shows the state where the injection nozzle is raised, and FIG. 5 (b) shows the case where the injection nozzle is lowered. FIG. 5C is a plan view showing the holding plate in which a circular through hole into which the tip of the injection nozzle is inserted is formed. This conventional vertical injection molding machine includes a holding plate 102 that is advanced and retracted in the vertical direction by tie bars 101 provided at four corners, and an upper mold (not shown) attached to the lower surface of the holding plate 102 is a holding plate 102. At the same time, by being advanced downward, the mold is opened and closed with a lower mold attached to the upper surface of a turntable (not shown) provided below the holding plate 102. Further, an injection unit 103 for injecting molten resin into the mold cavity is provided, and an injection nozzle 104 attached to the tip of the injection unit 103 is positioned downward as shown in FIG. The tip of the injection nozzle 104 is inserted into a mortar-shaped insertion hole 105 formed in the holding plate 102, and the molten resin enters the mold cavity with the injection nozzle 104 touching the upper mold. Is injected.

  As related to the prior art, Patent Document 1 and Patent Document 2 include a vertical injection molding machine in which an insertion hole that is inserted when the injection nozzle advances is formed in a holding plate to which the upper mold is attached. It is disclosed.

JP 2000-313032 A JP 2006-218644 A

  In a general vertical injection molding machine as disclosed in Patent Document 1 and Patent Document 2, as long as the tip of the injection nozzle is raised above the holding plate, the tip of the injection nozzle is visually observed. However, when the injection nozzle is lowered and inserted into the through hole of the holding plate, as shown in FIG. 5B, the tip of the injection nozzle can be performed relatively easily. It is practically difficult to perform maintenance / inspection work while visually observing the side. For example, after the operation of the vertical injection molding machine, the resin remaining at the tip of the injection nozzle is removed cleanly. When the inspection is performed, in a state where the injection nozzle is positioned below the upper surface of the holding plate, the injection nozzle must be raised one by one, and complicated work must be performed. It has been a problem that.

  The present invention has been made in view of the above-described problems, and is intended to facilitate the maintenance and inspection of the injection nozzle without being limited as much as possible to the position of the injection nozzle that is moved up and down. It is an object of the present invention to provide a vertical injection molding machine.

A vertical injection molding machine according to claim 1 is:
A flat holding plate to which the upper mold is attached at the bottom;
A plate to which the lower mold is formed to form a cavity with the upper mold on the upper part;
A vertical injection molding machine comprising: an injection unit for injecting molten resin into a cavity closed by the upper mold and the lower mold,
In order to inject the molten resin into the cavity, an injection nozzle attached to the tip of the injection unit is advanced downward to form a through hole through which the injection nozzle is inserted in the holding plate in the vertical direction,
Forming a recess for operation to be continuous with the through hole on the holding plate;
When the injection nozzle is advanced below the upper surface of the holding plate, the injection nozzle can be visually checked and maintained and inspected through the space formed by the working recess and the through hole. It is characterized by that.

The vertical injection molding machine according to claim 2 is the vertical injection molding machine according to claim 1,
The through hole is formed in a mortar shape having a lower diameter and a larger diameter as it goes upward, and the working recess is formed to have a larger diameter as the distance from the through hole increases.

The vertical injection molding machine according to claim 3 is the vertical injection molding machine according to claim 2,
The working recess is formed in a fan shape.

The vertical injection molding machine according to claim 4 is the vertical injection molding machine according to claim 3,
A tie bar insertion hole is formed in each corner of the holding plate, and a tie bar provided in the vertical direction is inserted into each of the tie bar insertion holes in each corner to hold the holding plate in a vertically movable manner on the tie bar. The working recess is formed in the holding plate at an imaginary line connecting any midpoint of the sides connecting the corners of the holding plate and the center of the through hole. And

The vertical injection molding machine according to claim 5 is the vertical injection molding machine according to any one of claims 1 to 4,
The injection unit includes a heating cylinder that heats and melts pellets as a raw material of a molded body molded by the mold, and the injection nozzle is screwed into a tip of the heating cylinder.

  According to the invention of the vertical injection molding machine, when performing maintenance / inspection work of the injection nozzle in a state of being advanced below the upper surface of the holding plate, the working concave portion and the through hole formed in the holding plate. The tip of the injection nozzle can be seen through the space, and the maintenance and inspection work can be performed by inserting a hand or a tool through the space made up of the working recess and through-hole while observing the tip of the injection nozzle. Can be done.

  In addition, the through hole is formed in a mortar shape with the diameter of the lower part becoming smaller and going upward, and the working concave part is formed in a fan shape so that the diameter becomes larger as it goes away from the through hole. It is easy to insert a hand or tool toward the tip of the nozzle, and even when the tip of the injection nozzle is lowered from the top surface of the holding plate, maintenance and inspection such as removal of resin remaining on the tip of the injection nozzle Work can be performed smoothly.

  Furthermore, since the working recess is formed on the imaginary line connecting the center of any of the sides of the holding plate and the center of the insertion hole through which the tip of the injection nozzle is inserted, it is not on the line connecting the through hole and the tie bar. Since the work recess is located at the position, maintenance and inspection work of the injection nozzle can be performed through the work recess and the through-hole without obstructing the tie bar.

  Furthermore, when exchanging the injection nozzle screwed to the tip of the heating cylinder, the injection nozzle can be easily attached to and detached from the heating cylinder through the space formed by the working recess and the through hole. it can.

It is a front view which shows the vertical injection molding machine of an example of this invention. It is a front view which shows the state which raised the injection nozzle of the vertical injection molding machine same as the above. It is a top view which shows the holding plate to which a metal mold | die is attached same as the above. It is a front view which shows the state which lowered | hung the injection nozzle of the vertical injection molding machine into the through-hole same as the above. FIG. 5A is a cross-sectional view showing a conventional vertical injection molding machine, FIG. 5A is a state where the injection nozzle is raised, FIG. 5B is a state where the injection nozzle is lowered, and FIG. 5C is a view of the injection nozzle. It is a top view which shows the holding | maintenance plate in which the circular shaped through-hole by which the front-end | tip is penetrated was formed.

  Hereinafter, an embodiment as the best mode for carrying out the present invention will be described with reference to FIGS. Needless to say, the present invention can be easily applied to configurations other than those described in the embodiments without departing from the spirit of the invention.

  1 is a front view showing a vertical injection molding machine according to an example of the present invention, FIG. 2 is a front view showing a state where an injection nozzle of the vertical injection molding machine is raised, and FIG. 3 is a holding plate to which an upper mold is attached. FIG. 4 is a front view showing a state in which the injection nozzle of the vertical injection molding machine is lowered into the through hole.

  The vertical injection molding machine 1 shown in FIG. 1 is roughly classified into a mold clamping unit 2, an injection unit 3 for supplying a molten resin, a display device 4 for displaying various operating conditions of the vertical injection molding machine 1, and the like. The injection unit 3 comprises a heating cylinder 5 for heating and melting pellets as a material of the molded body and an injection nozzle 6 removably screwed to the tip (lower part), and a servo motor (not shown) is driven as a drive source. As shown in FIG.

  Further, as shown in FIG. 1, the mold clamping unit 2 is provided with a turntable 11 serving as a plate with a lower mold 12 attached to the upper part thereof and spaced apart above the lower mold 12, and the mold opening and closing In this case, the holding plate 13 to which the upper die 10 is moved up and down in the vertical direction is fixed, and the upper die 10 attached to the lower portion of the holding plate 13 by being expanded and contracted is attached to the tie bar 14 via the holding plate 13. A toggle link mechanism that moves up and down along the longitudinal direction and opens and closes the lower mold 12, a servo motor as a drive source that opens and closes the mold by operating the toggle link mechanism, and the like are provided.

  As shown in FIG. 3, the holding plate 13 is formed in a quadrangular shape when viewed from above, and is provided so that four sides thereof are front, rear, left and right of the vertical injection molding machine 1. Further, tie bar insertion holes 15 are formed at four corners of the holding plate 13, and a tie bar 14 is vertically inserted into each of the four tie bar insertion holes 15, and the holding plate 13 is held up and down by the tie bar 14. Is done. In addition, a through hole 16 having a size capable of inserting and removing the injection nozzle 6 attached to the tip of the injection unit 3 is formed at the center of the holding plate 13 and is injected into the through hole 16 penetrating vertically. With the injection nozzle 6 touching the upper mold 10 with the tip of the nozzle 6 inserted, the molten resin is injected from the injection nozzle 6 into the mold cavity closed.

  As shown in FIG. 4, the through-hole 16 is formed in a mortar shape with a lower diameter (100 mm) being smaller and increasing upward (upper diameter 200 mm). A working recess 17 is formed in a row. As shown in FIG. 3, the working recess 17 is formed in a fan shape on one side (right side of the vertical injection molding machine 1 in this embodiment) of the four sides of the rectangular holding plate 13. A working recess 17 is formed in the holding plate 13 on the imaginary line connecting the midpoint of one side located on the right side of the vertical injection molding machine 1 and the center of the through hole 16 among the four sides. Thus, even when the tip of the injection nozzle 6 is advanced downward from the upper surface of the holding plate 13, maintenance of the tip of the injection nozzle 6 is performed through the space formed by the working recess 17 and the through hole 16.・ Inspection can be performed.

  As described above, according to the vertical injection molding machine 1 according to the present invention, when the maintenance / inspection work of the injection nozzle 6 is performed in a state of being advanced below the upper surface of the holding plate 13, it is formed on the holding plate 13. A working recess 17 is formed through the working recess 17 and the through-hole 16 so that the tip side of the injection nozzle 6 can be visually recognized, and the tip of the injection nozzle 6 is passed through the space formed by the working recess 17 and the through-hole 16. Maintenance and inspection work can be performed by inserting a hand or a tool while viewing the side.

  Furthermore, the through-hole 16 is formed in a mortar shape with a lower diameter and a diameter increasing as it goes upward, and the working recess 17 is formed in a fan shape so that the diameter increases as it moves away from the center of the through-hole 16 in the horizontal direction. Therefore, it becomes easy to insert a hand or a tool toward the tip side of the injection nozzle 6, and it remains on the tip side of the injection nozzle 6 even when the tip of the injection nozzle 6 is lowered from the upper surface of the holding plate 13. Inspection and maintenance work such as resin removal work can be easily performed.

  Further, tie bar insertion holes 15 are formed at each corner of the holding plate 13 (more specifically, four corners of the holding plate 13 formed in a rectangular shape), and the tie bar insertion holes 15 at each corner are provided in the vertical direction. The tie bar 14 is inserted into the tie bar 14 so that the holding plate 13 can be moved up and down in the vertical direction, and each of the sides of the holding plate 13 (more specifically, four sides of the holding plate 13 formed in a square shape) Since the working recess 17 is formed on the imaginary line connecting any one of the above and the center of the insertion hole 16 through which the tip of the injection nozzle 6 is inserted, the operation is not performed on the line connecting the through hole 16 and the tie bar 14. Since the working recesses 17 are disposed, the injection nozzle 6 passes through the working recesses 17 and the like without the tie bars 14 provided at the corners (more specifically, the four corners) of the holding plate 13 getting in the way. It is possible to perform the maintenance and inspection work.

  Furthermore, since the four sides connecting the four corners of the holding plate 13 are arranged so as to be front, rear, left and right of the vertical injection molding machine 1, the front, rear, left and right of the vertical injection molding machine 1 are not disturbed. The maintenance / inspection work of the injection nozzle 6 can be performed from the side where any one of the four working recesses 17 is formed.

  Further, when the injection nozzle 6 screwed to the tip of the heating cylinder 5 is replaced, the tip of the injection nozzle 6 is inserted into the through hole 16 as shown in FIG. In addition, the injection nozzle 6 can be attached to and detached from the heating cylinder 5 through the space formed by the working recess 17 and the through hole 16.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention. The working recess 17 is located on the right side of the vertical injection molding machine 1 and is formed on the holding plate 13. However, the working recess 17 may be on the front side, the rear side, or the left side instead of the right side. May be. Further, the holding plate 13 of this embodiment is formed in a quadrangular shape as described above, and is provided with tie bars 14 at the four corners thereof. Instead, for example, the holding plate has a triangular shape, Even when the tie bar 14 is provided at the three corners, the above-described effect is achieved that the injection nozzle 6 can be maintained and inspected through the work recess 17 and the like without the tie bar 14 becoming in the way. Can be played.

DESCRIPTION OF SYMBOLS 1 Vertical injection molding machine 3 Injection unit 5 Heating cylinder 6 Injection nozzle 10 Upper mold | type 11 Turntable (plate)
12 Lower mold 13 Holding plate 14 Tie bar 15 Tie bar insertion hole 16 Through hole (space part)
17 Working recess (space)

Claims (5)

A flat holding plate to which the upper mold is attached at the bottom;
A plate to which the lower mold is formed to form a cavity with the upper mold on the upper part;
A vertical injection molding machine comprising: an injection unit for injecting molten resin into a cavity closed by the upper mold and the lower mold,
In order to inject the molten resin into the cavity, an injection nozzle attached to the tip of the injection unit is advanced downward to form a through hole through which the injection nozzle is inserted in the holding plate in the vertical direction,
Forming a recess for operation to be continuous with the through hole on the holding plate;
When the injection nozzle is advanced below the upper surface of the holding plate, the injection nozzle can be visually checked and maintained and inspected through the space formed by the working recess and the through hole. A vertical injection molding machine characterized by that.   2. The through-hole is formed in a mortar shape having a lower diameter and a larger diameter as it goes upward, and the working recess is formed to have a larger diameter as the distance from the through-hole increases. The vertical injection molding machine described.   The vertical injection molding machine according to claim 2, wherein the working recess is formed in a fan shape.   A tie bar insertion hole is formed in each corner of the holding plate, and a tie bar provided in the vertical direction is inserted into each of the tie bar insertion holes in each corner to hold the holding plate in a vertically movable manner on the tie bar. The working recess is formed in the holding plate at an imaginary line connecting any midpoint of the sides connecting the corners of the holding plate and the center of the through hole. The vertical injection molding machine according to claim 3.   The injection unit includes a heating cylinder that heats and melts pellets as a raw material of a molded body molded by the mold, and the injection nozzle is screwed into a tip of the heating cylinder. The vertical injection molding machine according to any one of 1 to 4.

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