JP2002370251A - Catch basin injection-molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catch basin injection-molding apparatus capable of manufacturing a fall regulating catch basin for regulating the fall between mutual pipings, which can cope with a large fall. SOLUTION: The catch basin injection-molding apparatus is constituted so as to injection-mold the catch basin 1 having a vertical pipe 2 and the inverted part 3 provided at the lower end of the vertical pipe 2 and composed of an outer mold 9 and a main core 14. A pipe mounting rod 15 is connected to the root end of the main core 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding apparatus for adjusting a head of a pipe buried underground, for example.

[0002]

2. Description of the Related Art As a head adjustment for adjusting a head of a pipe buried underground, a bottomed inverted part (43) is provided with a discharge pipe connection part (44) at the tip of a vertical pipe (42). (41) (see FIG. 21) having a head adjustment (41) has been provided. Conventionally, the head adjustment (41) is formed by injection molding the vertical pipe (42) and the inverting part (43) integrally. The invert section (43) is formed on the vertical pipe (42)
Is manufactured at a later step of attaching with an adhesive or the like.
Drop adjustment (41), at a location where the pipes have a drop, drill a predetermined location of the vertical pipe (42) of the shunt according to the height of the inflow pipe, attach an inflow pipe connection member such as a branch pipe, It has the convenience that pipes can be connected simply by connecting the inflow pipe to the inflow pipe connecting member, and vertical pipes (42) of various heights (41) are required.

[0003]

[Problems to be Solved by the Invention] However, in the case of manufacturing a masque by bonding an invert portion and a vertical tube, compared with a case where an invert portion and a vertical tube portion are integrally molded, An extra bonding step is required, and a step for quality control of the bonded part is also required. Therefore, in the case of manufacturing the sword by bonding the invert portion and the vertical tube, there is a problem that the number of processing steps increases and the production cost increases.
In addition, in the case of integrally molding a masque, for example, a large die is required to mold a sward corresponding to a large head, and a large-sized molding machine is required accordingly. Therefore, when manufacturing a sash that can cope with a large head, it is inappropriate to integrally mold the sash.

[0004]

The present invention, as a means for solving the above problems, has a vertical pipe (2) and an inverting section (3) provided at the lower end of the vertical pipe (2). (1)
An injection molding machine, comprising an outer mold (9) and a main core
(14) The present invention provides an injection molding apparatus (5) having a pipe mounting rod (15) connected to a root end of the main core (14).

[0005] Between the main core (14) and the pipe mounting rod (15), it is desirable to provide an expansion and contraction device (16),
The expanding / reducing device (16) includes an expanding / reducing guide (23) having a dovetail groove (22) having a steep slope, and an inner wall (24) of the tubular body (2A) sliding along the dovetail groove (22). A core (25) that comes into contact with the core (25), and a diameter expansion / contraction device (16) is provided in which the core (25) expands and contracts by moving the diameter expansion / contraction guide (23) back and forth. Is desirable.

Further, the present invention has a vertical pipe (2) and an inverting section (3) provided at a lower end of the vertical pipe (2).
An apparatus for injection molding (1), comprising an outer mold (9) composed of a fixed outer mold (8A) and a movable outer mold (8B), a main core (14), and an upper core (10). A pipe mounting rod (15) is connected to the root end of the main core (14), the outer die (9) forms the outer shape of the invert portion (3), and the main core (14) is The inner core of the part (3) is provided, and the upper core (10) provides an injection molding apparatus (5) for forming the discharge pipe connection part (4).

[0007] The main core (14) is desirably installed on a slide base that can slide left and right, and a device for expanding and reducing the diameter is provided between the main core (14) and the pipe mounting rod (15). (1
6) is preferably provided, and the expanding / contracting device (16) is
An expanding and contracting diameter guide (23) having a dovetail groove (22) having a steep slope,
A core (25) that slides along the dovetail groove (22) and comes into contact with the inner wall (24) of the tube (2A) is provided. Diameter expanding / contracting device in which child (25) expands / contracts
It is desirable that (16) be provided.

[0008]

[Action] The pipe (2A) prepared in advance is mounted on the pipe mounting rod (15) of the injection molding apparatus (5), and injection molding is performed, so that the inverted part (3) and the vertical pipe ( 2) The part is integrally molded.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in FIGS. 1 to 20. FIG. 1 shows a tube (2A), for example, polyethylene, polypropylene, polyvinyl chloride, heat It is manufactured by extrusion molding of thermoplastic resin such as a plastic elastomer, or by cutting a synthetic resin pipe (polyvinyl chloride pipe, polyethylene pipe, polypropylene pipe, polybutene pipe, etc.) to a predetermined length and processing the end as necessary. You.

In the above tube (2A), an inverting portion
The shape of the end (36) of the tube (2A) on the side where (3) is formed, especially the end having a slope as shown in FIGS. 2, 3 and 4.
It is desirable that the shape of (36A), the end portion (36B) having a step, the end portion (36C) having a concave portion, and the like be formed so as to increase the contact area with the molding material.

FIG. 5 to FIG. 18 show an injection molding apparatus for integrally molding a bottomed inverting part (3) into which a discharge pipe connecting part (4) is protruded at a lower part of the pipe (2A). (5). The injection molding device (5) includes a main core unit (7)
And an injection mold (6).

The main core unit (7) includes a base (12)
And a slide table (13) that slides on the base (12).
(3) a pipe mounting rod (15) to which a main core (14) shaping the inside shape is connected, and a sliding plate (17) fixed to a root end of the pipe mounting rod (15). A hydraulic cylinder (18), which is a device for sliding the pipe mounting rod (15) through the sliding plate (17), and the pipe mounting rod at a distal end side from the mounting portion of the sliding plate (17). (15) is provided with a tube contact plate (20) that contacts the end (19) of the tube (2A) mounted on the injection molding device (5).

A hydraulic cylinder (21) is provided between the tube contact plate (20) and the slide plate (17), and the tube contact plate (20) is The set position can be adjusted by operating the hydraulic cylinder (21). That is, the tube contact plate (20)
Is the end of the pipe (2A) to which the pipe mounting rod (15) is mounted
(19), the tube contact plate (20) is set at a position where it comes into contact with the tube contact plate (20). At this time, the tube contact plate (20) is adjusted to the length of the tube (2A). Adjust the setting position.

In order to adjust the set position of the main core (14), the hydraulic cylinder (18) is operated to slide the pipe mounting rod (15) through the sliding plate (17). Do. When sliding the pipe mounting rod (15), the pipe contact plate (2
0) also slides integrally with the pipe mounting rod (15).

An expansion / contraction device (16) is provided between the pipe mounting rod (15) and the main core (14) (see FIG. 10). The expansion and contraction device (16) is configured to melt the pipe (2A) by press-fitting the pipe (2A) when injection-molding the invert portion (3) on the pipe (2A) mounted on the pipe mounting rod (15). This is a device for preventing the molding material in the state from flowing out to the tube (2A) side, and the expanding and contracting device (16) includes an expanding and contracting diameter guide (23) provided with a dovetail groove (22) having a steep slope. A fan-shaped core (26) and a trapezoidal core (27), which are cores (25) that slide along the dovetail groove (22) and come into contact with the inner wall (24) at the tip of the tube (2A) ( See FIG. 11). A plurality of guide rods (29) are provided between the pipe mounting rod (15) and the main core (14), and the guide rod (29) penetrates the expanding / reducing guide (23). I have. The expansion and contraction guide (23)
The hydraulic cylinder (28) can move forward and backward along the guide rod (29), and when the expanding / reducing guide (23) advances toward the main core (14), the sector core (26) and the trapezoid core (27) ) Slides along the dovetail groove (22) of the expanding and contracting diameter guide (23) and in the direction of ascending, so as to be in the expanded state (see FIG. 12), and the expanding and contracting diameter guide (23) is attached to the pipe. When retracted in the direction of the rod (15), the fan-shaped core (26) and the trapezoid core (27)
It slides along the dovetail groove (22) of (23) and in the direction of descending the gradient to be in a reduced diameter state (FIG. 13).

[0016] The expansion / contraction device (16) prevents a part of the molding material injected from the injection device during the injection molding from flowing out to the pipe (2A) side, and causes defective molding due to the outflow of the molding material. Is prevented.

The injection mold (6) comprises an outer mold (9) composed of a movable outer mold (8B) and a fixed outer mold (8A) for molding the outer shape of the invert section (3), and a discharge pipe connection section. An upper core (10) for molding the inner shape of (4) and a lower core (11) for molding the legs of the invert portion (3). The upper core (10) is disposed above the outer mold (9), and can be inserted into and removed from the outer mold (9). 31), and the attaching / detaching means (31) is installed in the fixed outer mold (8A). The lower core (11) is also an outer mold
It is provided on a movable block (34) which can be moved in and out of (9) and which is interlocked with the movable outer die (8B) by interlocking means (32) such as an angular pin. Note that the injection molding apparatus (5) of the present invention includes the fixed outer mold (8A) and the movable outer mold (8B).
And a mold clamping device (35) for clamping and opening the outer mold (9).

Hereinafter, a vertical pipe is formed by the injection molding apparatus (5).
Injection molding of a sculpture (1) having a bottomed inverted part (3) with a discharge pipe connection part (4) extended to (2) is performed by a fixed outer mold (8A), a movable outer mold (8B) and a main mold. This will be described together with a plan view of the core (14) (FIGS. 14 to 18). The plan views (FIGS. 14 to 18) are plan views for explaining movements of the fixed outer die (8A), the movable outer die (8B) and the main core (14).
Only the portions of the injection molding device (5) necessary for the description are shown in the figure.

The injection molding apparatus (5) shown in FIG. 14 is in an initial state, that is, the injection molding die (6) is in an open state and comprises a fixed outer die (8A) and a movable outer die (8B). Outer type (9)
Are separated and the main core unit (7) is fixed external type (8
The main core (14) is located between the movable outer mold (8B) and the movable outer mold (8B). The main core unit
The arrangement of (7) is performed by adjusting the positions of the slide plate (17) and the slide base (13). In the injection mold (6) in the mold open state, the upper core (10) and the lower core (11)
Is in a state of being pulled out from the outer die (9), and in the main core unit (7), the diameter expanding / contracting device (16) is in a diameter contracting state. A broken line passing through the set position of the main core (14) is defined as a reference line X.

The pipe (2A) is externally inserted into the pipe mounting rod (15) in the direction of the arrow A shown in FIG. 15, and the inner surface of one end of the pipe (2A) is provided with a fan-shaped core of the expanding / reducing device (16). (26) and trapezoid core (27)
Of the tube (2A) and the end surface of the other end of the tube (2A) comes into contact with the tube contact plate (20).
6) With the diameter increased (see FIG. 12), the tube (2A) is set on the tube mounting rod (15). The expanding diameter of the expanding / reducing device (16) is controlled by operating the hydraulic cylinder (28) to move the expanding / reducing guide (23) toward the main core (14) along the guide rod (29). (26) and the trapezoid core (27) can be reached by sliding the dovetail groove (22) having a steep slope. At this time, the peripheral portions of the fan-shaped core (26) and trapezoid core (27) in the expanded state
(33A, 33B) is in contact with the inner wall (24) at the tip of the tubular body (2A). When the tube (2A) is set, the tube contact plate (20) is in contact with the end (19) of the tube (2A) externally inserted into the tube mounting rod (15).

After the pipe (2A) is set on the pipe mounting rod (15), the slide base (13) of the main core unit (7) is slid in the direction of the fixed outer mold (8A) so as to slide the main core (14). The fixed outer type (8A)
(See FIG. 16). Main core for fixed outer type (8A)
After mounting (14), the hydraulic cylinder (30) of the attaching / detaching means (31) installed on the upper part of the fixed outer die (8A) is operated to operate the upper core (1).
0) is inserted into the fixed outer mold (8A).

After the upper core (10) is inserted into the fixed outer mold (8A), the movable outer mold (8B) is moved to the fixed outer mold (8) by the operation of the mold clamping device (35).
It is moved in the direction A) to perform mold clamping (see FIG. 17). At the time of this mold clamping, the movable block (34) of the lower core (11) provided with interlocking means (32) such as an angular pin
Is inserted into the outer mold (9) in conjunction with the movable outer mold (8B).

After the completion of the mold clamping, a molding material is injected from an injection device (not shown), and the invert portion (3) is inserted into the tube (2A).
Is molded. The molding material is, for example, a thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, or a thermoplastic elastomer, and is desirably the same molding material as the tubular body (2A). At the time of the injection molding, the injected molding material does not flow out to the pipe (2A) side since the fan-shaped core (26) and the trapezoidal core (27) of the expanding / reducing device (16) are in an expanded state. Therefore, it is possible to form the inverted portion (3) satisfactorily. In addition, the protrusion of the tube (2A) due to the injection molding pressure observed at the time of injection molding is prevented by the tube contact plate (20) contacting the end (19) of the tube (2A).

As shown in FIG. 18, after the invert portion (3) is formed, the injection mold (6) is opened. That is, the movable outer mold (8B) and the movable block (34) of the lower core (11) interlocking with the movable outer mold (8B) are separated from the fixed outer mold (8A) by operating the mold clamping device (35). Then, the mold opening is performed by operating the attaching / detaching means (31) of the upper core (10) and pulling out the upper core (10).

After the mold opening, the slide base (13) is slid so that the main core (14) is arranged on the reference line X, and the expanding / reducing device (16) in the expanded state is returned to the reduced state. The molded product (1) is taken out from the direction of the arrow B shown in FIG.

After taking out the molded product, the injection molding apparatus (5) is set in an initial state, and is prepared for the next molding (1).

As described above, the lower tube (1) (FIG. 19 and FIG. 20) having the bottomed inverted portion (3) into which the discharge tube connecting portion (4) is inserted is provided at the lower end of the vertical tube (2). Manufactured.

[0028]

According to the present invention, a masque for adjusting a large head can be manufactured.

[Brief description of the drawings]

 1 to 20 show an embodiment of the present invention.

FIG. 1 is a perspective view of a tubular body.

FIG. 2 is a sectional shape view of an end portion of a tubular body.

FIG. 3 is an end surface shape diagram of an end portion of a tubular body.

FIG. 4 is an end view of an end of a tubular body.

FIG. 5 is a sectional view of an injection molding machine.

FIG. 6 is a plan view of an injection molding machine.

FIG. 7 is a side view of the core unit.

FIG. 8 is an explanatory diagram of an initial state of an injection molding apparatus.

FIG. 9 is an explanatory view of a mold clamping state of an injection molding apparatus.

FIG. 10 is an explanatory view of an expanding / reducing device.

FIG. 11 is a perspective view of an expanding / reducing guide, a sector core and a trapezoid core.

FIG. 12 is a sectional view of a diameter-enlarging / reducing device in an expanded state.

FIG. 13 is a sectional view of a diameter-enlargement / reduction device in a diameter-reduced state

FIG. 14 is a plan view of the injection molding apparatus in an initial state.

FIG. 15 is a plan view of the injection molding apparatus in a state where a tube is set.

FIG. 16 is a plan view of the injection molding apparatus in a state where the main core is mounted on the fixed outer mold.

FIG. 17 is a plan view of an injection molding apparatus in which an injection molding die is in a clamped state.

FIG. 18 is a plan view of the injection molding apparatus in a state where a molded product is removed.

FIG. 19 is a perspective view of a masu.

FIG. 20 is a cross-sectional view showing a conventional example.

FIG. 21 is a perspective view of a masu.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Masu 2 Vertical pipe 2A pipe 3 Invert part 4 Discharge pipe connection part 5 Injection molding device 6 Injection mold 7 Main core unit 8A Fixed outer mold 8B Movable outer mold 9 Outer mold 10 Upper core 11 Lower core 13 Slide Base 14 Main core 15 Pipe mounting rod 16 Expansion / contraction device 17 Sliding plate 18 Hydraulic cylinder 19 End 20 Pipe contact plate 21 Hydraulic cylinder 22 Dovetail 23 Enlargement / reduction diameter guide 24 Inner wall 25 Core

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H019 FA01 FA12 FA14 4F202 AD12 AG08 AG29 AH11 AH43 AH81 CA11 CB01 CB12 CK52 CK82 4F206 AD12 AG08 AG29 AH11 AH43 AH81 JA07 JB12 JF05 JF35 JQ81

Claims (7)

[Claims] An apparatus for injection-molding a skewer having a vertical pipe and an inverted portion provided at a lower end of the vertical pipe, comprising an outer mold and a main core, wherein a root end of the main core is provided. Injection molding apparatus characterized in that a pipe mounting rod is connected to the part 2. Between the main core and the pipe mounting rod,
The squeeze injection molding apparatus according to claim 1, wherein an expansion and contraction apparatus is provided. 3. The expansion and contraction device according to claim 1, wherein said expansion and contraction device has a dovetail groove having a steep dovetail groove and a core which slides along said dovetail groove and comes into contact with the inner wall of the tube. 3. The injection molding apparatus according to claim 2, wherein the core is expanded and contracted by moving the core back and forth. 4. An apparatus for injection-molding a skewer having a vertical tube and an inverted portion provided at a lower end portion of the vertical tube, comprising: an outer die comprising a fixed outer die and a movable outer die; And an upper core, a pipe mounting rod is connected to a root end of the main core, the outer mold forms an outer shape of the invert portion, and the main core forms an inner shape of the invert portion, Injection molding apparatus characterized in that the upper core forms a discharge pipe connection. 5. The injection molding apparatus according to claim 4, wherein the main core is mounted on a slide base that can slide left and right. 6. A space between the main core and the pipe mounting rod.
5. The injection molding apparatus according to claim 4, further comprising an expansion / contraction device. 7. The expansion and contraction device includes an expansion and contraction guide having a steep dovetail groove and a core that slides along the dovetail groove and contacts an inner wall of the tube. 7. The injection molding apparatus according to claim 6, wherein the core is expanded and contracted by moving the core back and forth.