JP2598852B2 - Injection mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for injection molding, and more particularly to a mold for injection-molding a molded article having a cylindrical hose connection port having an open end.

[0002]

2. Description of the Related Art As a conventional injection molding die of this kind,
A mold for forming a lower case of a reserve tank for a brake fluid mounted on a vehicle shown in FIGS. 4 to 7 can be given.

FIG. 4 is a perspective view showing a lower case of a reserve tank formed by an injection mold, FIG. 5 is a front view showing one slide body of a conventional injection mold, and FIG.
5 is a sectional view taken along the line AA of FIG. 5 showing a slide member at a molding position of a conventional injection mold, and FIG. 7 is a sectional view B of FIG. 6 showing a slide member at a mold position of the conventional injection mold. -B
It is a line sectional view.

[0004] As shown in the figure, the lower case 1 is made of a synthetic resin material, and has a container shape opening upward. On one side surface of the lower case 1, a hose connection port 2 for an ABS (anti-lock brake system) of the vehicle is provided integrally. Also, although not shown, on the lower surface of the lower case 1,
A pair of mounting ports are provided for mounting on a master cylinder of the vehicle. The hose connection port 2 has a cylindrical shape protruding laterally, and the inside communicates with the inside and outside of the lower case 1. Further, the open end of the hose connection port 2 is formed to have a substantially constant thickness and is expanded so that when the ABS hose is fitted and fastened with a band, a drop-out preventing action is performed at the expanded portion. The lower case 1 thus configured is joined to the upper case 3 after forming to form a reserve tank 4, and is fixed on a master cylinder of the vehicle.

The injection molding die for molding the lower case 1 will be described. The lower case 1 is formed in a cavity 13 between a die core 11 and a pair of slide cores 12a and 12b. You. The core 11 and the slide cores 12a and 12b are mounted on a movable mounting plate (not shown) arranged on the left side in FIGS. 5 and 6, and are moved together with the movable mounting plate in the left-right direction (the left-right direction in FIGS. 5 and 6). Can move on. The core 11 is fixed to the movable mounting plate and has a shape corresponding to the inner surface of the lower case 1. The slide cores 12a and 12b are supported so as to be able to freely contact and separate in the front-rear direction (vertical direction in FIG. 6) along the hose connection port 2 of the lower case 1 with the substantially center of the core 11 as a boundary.
Each of the slide cores 12 a and 12 b has a shape corresponding to the outer surface of the lower case 1, and forms the cavity 13 with the core 11.

[0006] A pair of inclined holes 14 are provided in the two slide cores 12a, 12b at predetermined intervals in the vertical direction to the left and right, respectively. 12b. Each inclined hole 14 has a slide core 12a, 12
The upper inclined hole 14 is located at the same height as the hose connection port 2 of the lower case 1. In each inclined hole 14, an inclined hole 14
Each of the inclined pins 15 is inserted in the same manner as described above, and the right end of each of the inclined pins 15 is fixed to a fixed mounting plate (not shown) arranged on the right side in FIGS. Each inclined hole 1
4 has a front-rear direction, that is, the slide cores 12a,
As a result, the inclined pin 15 has a play back and forth in the inclined hole 14.

When the movable mounting plate moves rightward,
The core 11 and the slide cores 12a and 12b also move rightward as a unit and approach the fixed mounting plate, and as shown in FIG. 6, the inclined pin 15 presses one side in the inclined hole 14 of the slide cores 12a and 12b. Then, the two slide cores 12a and 12b are brought close to each other and clamped. Here, since the inclined pins 15 are distributed at equal intervals from the positions of the centers of gravity of the slide cores 12a and 12b, the slide cores 12a and 12b move without receiving a biased force. As is well known, at the time of this mold clamping, the slide cores 12a and 12b are pressed from front and rear by a slide retainer (not shown) fixed to the fixed mounting plate to maintain the mold clamping state. When the movable mounting plate moves to the left from the mold clamping state, the core 11 and the slide cores 12a and 12b also move to the left as a unit and separate from the fixed mounting plate. After moving by the play, the other side in the inclined hole 14 is pressed,
The mold is opened with the two slide cores 12a and 12b separated from each other back and forth.

The one slide core 12a is formed with a cavity hole 16 whose tip is expanded rearward so as to correspond to the outer periphery of the hose connection port 2. Also,
A guide hole 17 having a circular cross section and a slide hole 18 having a rectangular cross section are formed continuously from the cavity hole 16 to the rear of the slide core 12a. The slide hole 18 intersects with the upper inclined hole 14 and communicates with each other. doing. Slide hole 18
Inside, a rectangular parallelepiped slide member 19 is disposed movably in the front-rear direction, and guide protrusions 19 a formed on both sides of the slide member 19 engage with guide grooves 18 a on both sides in the slide hole 18. Thus, the slide member 19 is guided to move back and forth. The slide member 19 is provided with an operation hole 20 having a circular cross section at the same angle as the inclined hole 14, and the inclined pin 15 is inserted into the operation hole 20 without play. Therefore, when the slide core 12a moves right and left together with the movable mounting plate at the time of closing and opening the mold, the slide member 19 is immediately started to move back and forth by the operation of the inclined pin 15. Hereinafter, the slide member 19
The position where has moved forward is the molding position, and the position where it has moved backward is the die removal position.

A slide pin 21 is integrally provided at the front end of the slide member 19, and a large-diameter portion 21 a on the base end side of the slide pin 21 is fitted into the guide hole 18 without any gap, and the slide member 19 is provided. To guide the back and forth movement. The small-diameter portion 21b on the tip end side of the slide pin 21 is inserted into the cavity hole 16 in a loosely fitted state. And
As shown in FIG. 6, when the slide member 19 is at the molding position, the tip of the slide pin 21 contacts the core 11, and a tapered portion between the large diameter portion 21a and the small diameter portion 21b is The cavity 13 is formed around the slide pin 21 at a position where the tip of the cavity hole 16 is expanded.
The portion corresponding to the hose connection port 2 is formed.

Next, the operation of the injection mold having the above structure will be described.

Prior to the molding of the lower case 1, as shown in FIG.
2a and 12b move rightward and the inclined pin 15
4, one side is pressed, the slide cores 12a and 12b approach each other, and the mold is clamped. At this time, the slide member 19 is pressed forward by the inclined pin 15 and held at the molding position. Then, the molten resin is injected into the cavity 13 to form the lower case 1, and at the same time, the hose connection port 2 is integrally formed between the cavity hole 16 and the slide pin 21.

After the lower case 1 is solidified and the core 11 and the slide cores 12a and 12b start moving to the left along with the movable mounting plate, first, the slide member 19 is moved to the mold release position by the inclined pin 15, and The slide pin 21 is slightly detached rearward from the hose connection port 2 after molding. When the movable mounting plate further moves, the other side in the inclined hole 14 is pressed by the inclined pin 15 moved by the amount of play in the inclined hole 14, and the two slide cores 12 a and 12 b are separated from each other back and forth around the core 11. The mold is opened. At this time, since the lower case 1 is fitted to the core 11 and its movement is regulated,
Hose connection port 2 is cavity hole 1 of slide core 12a
6 will be pulled out. At this point, the small-diameter portion 21b of the slide pin 21 corresponds to the open end of the hose connection port 2 due to the movement of the slide member 19, and a gap is formed on the inner periphery of the open end. The mouth 2 is easily pulled out from the cavity hole 16 while bending the opening end inward, and then the lower case 1 is taken out to the right in FIG. 6 by an operator, and the injection molding for one cycle is completed. I do.

In addition to the above-mentioned injection mold,
FIGS. 8 to 10 show examples of conventional molds.

FIG. 8 is a front view showing one slide body of another conventional injection mold, and FIG. 9 is a view showing a slide member at a molding position of another conventional injection mold. FIG. 10 is a cross-sectional view taken along the line CC of FIG. 9, and FIG. 10 is a cross-sectional view taken along the line DD of FIG.

In another conventional injection molding die, each of the slide cores 31a and 31b is provided with one inclined pin 32.
The slide member 33 is moved by the slide holder 3
4 to move. Explaining below, the inclined hole 35 is provided at the position of the center of gravity of the slide cores 31a and 31b, and the inclined pins 32 of the fixed mounting plate are inserted with play back and forth. Also, the slide core 31
A well-known slide holder 34 is disposed on both front and rear sides of the slide cores 31a, 31b (the rear side is shown in FIG. 9).
The boundary surface 36 of the slide presser 34 with respect to 31b is inclined at an angle closer to the front and rear direction than the inclined pin 32. At the time of mold clamping, the slide holder 34 has an effect of bringing the slide cores 31a and 31b closer together with the inclined pin 32, and since the angles of the two are different, first, the slide cores 31a and 31b are operated closer by the inclined pin 32. Immediately before the completion of mold clamping, the slide cores 31a and 31b are operated to approach by the slide retainer 34 instead of the inclined pin 32 , so that the mold clamping state is reliably maintained.

A cavity hole 37, a guide hole 38 and a slide hole 39 are continuously formed in one slide core 31a in the same manner as in the above-mentioned mold.
Is opened at the rear surface of the slide core 31a, and is closed by a slide presser. The slide member 33 is disposed in the slide hole 39, and the small diameter portion 40 b of the slide pin 40 provided at the front end of the slide member 33 is loosely inserted into the cavity hole 37. In the slide hole 39, the large diameter portion 40a of the slide pin 40
The slide member 33 is urged rearward by the spring 41 so that the rear end formed in a semicircular cross section is brought into contact with the slide retainer 34.

An operation groove 42 having a semicircular cross section is formed on the left side of the boundary surface 36 of the slide presser 34 at an angle closer to the front-rear direction (the vertical direction in FIG. 9) than the inclination angle. When the slide cores 31a and 31b move leftward from the mold clamping state shown in FIG.
The rear end slides on the boundary surface 36 and fits into the operation groove 42, and the slide member 33 is moved by the urging force of the spring 41.
The slide cores 31a and 31b are moved apart to the front and rear by the inclined pins 32 moved by the amount of play in the inclined holes 35 to move to the rear die-cutting position in accordance with the inclination of 2, and the mold is opened. A stopper member 43 is provided at the opening of the slide hole 39 to prevent the slide member 33 from being detached from the slide hole 39 when the slide holder 34 is removed.

Next, the operation of the injection mold having the above structure will be described.

Prior to forming the lower case 1, as shown in FIG. 9, the slide cores 31a and 31b are pressed in the approaching direction by the inclined pins 32 and the slide holders 34, and the mold is clamped. It is pressed at the boundary surface 36 of the presser 34 and held at the molding position. When the core 11 and the slide cores 31a and 31b start to move leftward after the injection molding of the lower case 1, first, the rear end of the slide member 33 fits into the operation groove 42,
The slide member 33 is moved to the mold release position by the urging force of the spring 41. As a result, the slide pin 40 is slightly disengaged rearward from the hose connection port 2 after molding, and the inner periphery of the open end of the hose connection port 2 is opened. A gap is created in Thereafter, the two slide cores 31a and 31b are separated from each other by the inclined pin 32 and opened, and the hose connection port 2 is pulled out from the cavity hole 37 while bending the opening end thereof inward. When 1 is taken out, injection molding for one cycle is completed.

[0020]

The former former injection molding die uses the inclined pins 15 for bringing the slide cores 12a and 12b into and out of contact with each other, as described above. Is moved. Therefore, the position of the inclined pin 15 is naturally determined by the hose connection port 2, and the inclined pin 15 is unsuitable for moving the slide cores 12a, 12b, that is, it is biased with respect to the center of gravity of the slide cores 12a, 12b. When in the position, it is necessary to newly add the inclined pin 15 as described above in order to balance. As a result, two inclined pins 15 which are originally required only become one, so that the structure of the mold is complicated, and there is a possibility that the manufacturing cost is increased.

Further, since the latter injection molding die is configured to move the slide member 33 to the die removal position by using the urging force of the spring 41 as described above, for example, a slide pin is used. When the molten resin intrudes and solidifies between the guide hole 40 and the guide hole 38, the spring 41 is not so strong.
With such an urging force, a situation occurs in which the slide member 33 cannot be moved. Therefore, the hose connection port 2 after molding cannot be pulled out from the inside of the cavity hole 37, so that the occurrence rate of defective products increases, and the production cost of the molded products may increase.

On the other hand, in both the former and the latter, the outer circumference of the hose connection port 2 is slid over the slide cores 12a, 12a.
It is configured to be formed by cavity holes 16 and 37 of b, 31a and 31b. Since the slide cores 12a, 12b, 31a, 31b have a considerable weight, the slide cores 12a, 12b, 31 are turned on a lathe or the like.
a, 31b while rotating the cavity holes 16, 3
7 cannot be formed, and the slide cores 12a, 12
It is necessary to form the cavity holes 16 and 37 by machining with the b, 31a, 31b fixed, for example, by electric discharge machining or the like, and the machining operation has been complicated.

Accordingly, the present invention simplifies the structure of the mold and reduces the manufacturing cost thereof,
The hose connection port of the molded product is securely pulled out of the cavity hole, preventing the occurrence of defective products, reducing the production cost, and easily forming the cavity hole during production to process It is an object of the present invention to provide an injection molding die capable of simplifying the operation.

[0024]

According to the present invention, there is provided an injection mold, in which a cavity of a molded product is formed, and the mold is opened in a direction along a hose connection port whose opening end is widened. A slide hole formed in the body facing the cavity, a forming pin provided in the slide hole, and a movable pin disposed in the slide hole between a molding position and a die removing position. A slide member, and a cavity hole that penetrates through the slide member, into which the molding pin is inserted in a loose fit state, and that forms the hose connection port with the molding pin are provided.

[0025]

In the present invention, the slide member is moved to the molding position, the mold is clamped, the molded product is molded by the molten resin injected into the cavity, and the molded product is integrally formed between the molding pin and the cavity hole. When the hose connection port is formed and the mold is subsequently opened, the slide member is moved to the die removal position in the slide hole due to the pull-out resistance of the hose connection port from inside the cavity hole, and as a result, A gap is formed on the inner periphery of the open end of the hose connection port, and the hose connection port can be easily pulled out while bending the expanded open end inward. A mechanism is not particularly required, the structure is simplified, and when the mold is opened, the slide member can be reliably moved to the mold release position, and the hose connection port can be pulled out. Because it is small, by rotating the slide member in a lathe or the like, it becomes possible to easily form a cavity hole.

[0026]

Embodiments of the present invention will be described below.

FIG. 1 is a front view showing one slide body of an injection molding die according to one embodiment of the present invention, and FIG. 2 is a molding position of the injection molding die according to one embodiment of the present invention. FIG. 3 is a sectional view taken along line EE of FIG. 1 showing a slide member, and FIG. 3 is a sectional view taken along line FF of FIG. is there.

As shown in the figure, the basic structure of the injection mold of the present embodiment relating to the core 51 and the slide cores 52a and 52b is substantially the same as that of the mold described in the prior art. In this embodiment, the inclined holes 53 of the slide cores 52a and 52b are formed in a circular cross section without play with respect to the inclined pin 54, and the slide cores 52a and 52 are opened when the mold is opened.
The only difference is that as soon as b moves to the left, the slide cores 52a and 52b begin to separate from each other with the inclined pin 54.

A major difference from the injection molding die described in the prior art is the configuration of a slide member 55 provided on one slide core 52a, as described below. At a position corresponding to the hose connection port 2 of the slide core 52a, a slide hole 56 having a rectangular cross section is formed at a predetermined depth toward the rear, and the opening of the slide hole 56 faces the cavity 57. A molding pin 58 is integrally erected toward the front in the center of the rear part in the slide hole 56,
The molding pin 58 is composed of a large-diameter portion 58a on the base end side and a small-diameter portion 58b on the front end side. Also, the large diameter portion 58 of the molding pin 58
a and the small-diameter portion 58b both have a circular cross section, and a portion between them has a tapered shape.

A slide member 55 having a substantially rectangular parallelepiped shape is provided in the slide hole 56, and a front portion of the slide member 55 is formed at a right angle so as to follow two side surfaces of the cavity 57, as shown in FIG. Stopper protrusions 55a are formed on both sides of the rear end of the slide member 55. The stopper protrusions 55a
Engages with the stopper grooves 56a on both sides in the slide hole 56 to allow the slide member 55 to move in the front-rear direction by a predetermined stroke. Here, the position at which the slide member 55 has moved rearward is defined as a molding position. As shown in FIG. 2, at this molding position, the front portion of the slide member 55 is flush with the surface of the slide core 52a. A cavity 57 is formed between them, and one side of the front portion of the slide member 55 abuts against the slide core 52b on the other side, thereby holding the slide member 55 at this molding position. The position at which the slide member 55 has moved forward is referred to as a die-cutting position. As shown in FIG. 3, at this die-cut position, the front portion of the slide member 55 projects toward the cavity 57 from the surface of the slide core 52a.

A guide hole 60 and a cavity hole 61 are formed continuously in the slide member 55 so as to penetrate from the rear to the front. The large-diameter portion 58a of the molding pin 58 is inserted into the guide hole 60, and the slide member 55 moves back and forth as described above while being guided by the large-diameter portion 58a. When the small diameter portion 58b of the molding pin 58 is loosely inserted into the cavity hole 61, and when the slide member 55 is at the molding position, the widened end of the cavity hole 61 becomes the tapered portion of the molding pin 58. A portion corresponding to the hose connection port 2 of the cavity 57 is formed around the molding pin 58 corresponding to the shape-like portion.

Next, the operation of the injection mold having the above structure will be described.

Prior to forming the lower case 1, as shown in FIG. 2, the core 51 and the slide cores 52a and 52b move to the right together with a movable mounting plate (not shown), and
By the operation of 4, the slide cores 52a and 52b approach and are clamped, and the slide member 55 is pressed by the mating slide core 52b and moves to the molding position. Then, the molten resin is injected into the cavity 57 to form the lower case 1, and at the same time, the hose connection port 2 is integrally formed between the molding pin 58 and the cavity hole 61.

After the lower case 1 is solidified and the core 51 and the slide cores 52a and 52b start moving to the left along with the movable mounting plate, the slide cores 52a and 52b are first pressed by the inclined pins 54, and Begins to separate immediately from the center. Since the opening of the hose connection port 2 at this time is held without a gap between the molding pin 58 and the cavity hole 61 and cannot be pulled out from the cavity hole 61, as shown in FIG. With the movement of the core 52a, the slide member 55 is moved to the die release position in the slide hole 56. As a result, the small-diameter portion 58b of the molding pin 58 corresponds to the open end of the hose connection port 2, and a gap is generated on the inner periphery of the open end, so that the slide cores 52a, 5
As the hose 2b further separates, the hose connection port 2 is easily pulled out from the inside of the cavity hole 61 while bending the opening end inward, and then the lower case 1 is taken out and injection molding for one cycle is completed.

As described above, in the injection molding die of this embodiment, when opening the die, the slide member 55 at the molding position is moved by utilizing the resistance when the hose connection port 2 is pulled out from the cavity hole 61. Moved to the die removal position,
A gap is formed in the inner periphery of the open end of the hose connection port 2, and the hose connection port 2 is pulled out of the cavity hole 61. Therefore, in order to move the slide member 55, for example, there is no need to newly add an inclined pin 15 as in a conventional mold shown in FIG. 6, and the slide cores 52a and 52b are separated by opening the mold. Then, since the slide member 55 is surely moved to the die removing position by the pull-out resistance of the hose connection port 2, the hose connection port 2 after molding is inserted into the cavity hole 37 as in the conventional mold shown in FIG. There is no danger that defective products will be generated without further pulling out.

Moreover, in the prior art molds shown in FIGS. 6 and 9, the cavity holes 1 of the slide cores 12a and 31a are formed.
The outer periphery of the hose connection port 2 is formed at 6, 37,
As described above, in the mold of the present embodiment, the outer periphery of the hose connection port 2 is formed by the cavity hole 61 of the slide member 55 which is much smaller than the slide cores 52a and 52b. Therefore, the cavity member 61 can be easily formed by rotating the slide member 55 with a lathe or the like.

As described above, in the injection mold of the above embodiment, the cavity 57 corresponding to the shape of the lower case 1 is formed, and the direction along the hose connection port 2 of the lower case 1 whose opening end is expanded. A pair of slide cores 52 that open at the same time
a, 52b, a slide hole 56 formed in the cavity 57 at a position corresponding to the hose connection port 2 of the one slide core 52a, and the slide hole 56
Between a molding pin 58 provided in the slide hole 56, a molding position provided in the slide hole 56 and immersed in the slide hole 56, and a mold removal position in which one side is protruded into the cavity 57. A movable slide member 55 and the hose is inserted through the slide member 55 so that the molding pin 58 is inserted in a loosely fitted state, and the slide member 55 is in the molding position when the hose is between the slide pin 55 and the molding pin 58. Along with forming the connection port 2, the slide member 55 is moved relative to the forming pin 58 with the movement of the slide member 55 to the die removing position, and a gap is formed in the inner periphery of the opening of the hose connection port 2 after forming. And a cavity hole 61.

Therefore, when opening the mold, the cavity hole 6
Since the slide member 55 is moved to the mold release position by using the resistance when the hose connection port 2 is pulled out from the inside of the mold 1, a mechanism for moving the slide member 55 is not particularly required. The structure can be simplified, and the manufacturing cost can be greatly reduced.

Further, when the mold is opened, the slide member 55 is reliably moved to the mold removal position, so that the hose connection port 2 can be pulled out, and the occurrence of defective products can be prevented from occurring, and the lower case 1 can be manufactured. The cost can be significantly reduced.

Moreover, since the slide member 55 is small, the cavity hole 61 can be easily formed by rotating the slide member 55 with a lathe or the like, and the processing operation can be greatly simplified. .

The injection mold of the above embodiment is embodied as a mold for injection-molding the lower case 1 of the brake fluid reserve tank 4; However, the type of the molded product is not limited as long as the molded product is provided with a hose connection port whose opening end is widened and injection molded. Therefore, for example, as shown in FIG.
Can be embodied as a mold for injection molding.

The mold of the above embodiment is provided as a pair of slide cores 52a and 52b which are provided so as to be able to freely contact and separate about the core 51 and form the cavity 57 of the lower case 1 with the core 51. However, when carrying out the present invention, the present invention is not limited to this, as long as the mold can be opened in the direction along the hose connection port of the molded product and the hose connection port can be die-cut. Good. Therefore, for example, a molded article is formed by injection molding using a pair of molds not using the slide cores 52a and 52b, and one of the molds is provided with a slide member 55 for molding the hose connection port 2. It is also possible.

[0043]

As described above, the mold for injection molding of the present invention has a mold in which a cavity of a molded product is formed and the mold is opened in a direction along a hose connection port whose opening end is widened. A slide hole formed in the body facing the cavity, a forming pin provided in the slide hole, and a movable pin disposed in the slide hole between a molding position and a die removing position. The slide member is provided in the slide member, the molding pin is inserted in a loose fit state, and a cavity hole for molding the hose connection port between the slide pin and the molding pin is provided. The mold is moved and the mold is clamped, and a molded product is molded by the molten resin injected into the cavity, and a hose connection port is integrally formed between the molding pin and the cavity hole. When the mold is opened, Due to the pull-out resistance of the hose connection port from the inside of the hole, the slide member is moved to the mold release position in the slide hole, and as a result, a gap is formed on the inner periphery of the open end of the hose connection port, and the expanded open end is opened. It is possible to easily pull out the hose connection port while bending inward, and thus a mechanism for moving the slide member is not particularly required, the structure of the mold is simplified, and the manufacturing cost is reduced. In addition to being able to greatly reduce, when the mold is opened, the slide member can be reliably moved to the mold removal position and the hose connection port can be pulled out, so that the occurrence of defective products can be prevented beforehand, and Since the manufacturing cost of the molded article can be greatly reduced and the slide member is small, it is possible to easily form the cavity hole by rotating the slide member with a lathe or the like. It can dramatically simplify the processing operations.

[Brief description of the drawings]

FIG. 1 is a front view showing one slide body of an injection mold according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along line EE of FIG. 1 showing a slide member at a molding position of an injection mold according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along the line FF of FIG. 2 showing a slide member at a mold release position of an injection mold according to one embodiment of the present invention.

FIG. 4 is a perspective view showing a lower case of a reserve tank formed by an injection mold.

FIG. 5 is a front view showing one slide main body of a conventional injection mold.

FIG. 6 is a sectional view taken along the line AA of FIG. 5, showing a slide member at a molding position of a conventional injection mold.

FIG. 7 is a sectional view taken along the line BB of FIG. 6, showing a slide member at a molding position of a conventional injection mold.

FIG. 8 is a front view showing one slide body of another conventional injection mold.

FIG. 9 is a cross-sectional view of the slide member at a molding position of another conventional injection mold, taken along the line CC of FIG.

FIG. 10 is a sectional view taken along the line DD of FIG. 9 showing a slide member at a mold removal position of another conventional injection mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower case (molded product) 2 Hose connection port 52a, 52b Slide core (mold) 55 Slide member 56 Slide hole 57 Cavity 58 Molding pin 61 Cavity hole

Claims (1)

(57) [Claims] 1. A mold body having a cavity corresponding to the shape of a molded article and having an open end expanded along a hose connection port of the molded article, and a mold corresponding to a hose connection port of the mold body. At a position where the slide hole is formed facing the cavity, a molding pin protruding into the slide hole, and a molding position disposed in the slide hole and immersed in the slide hole. A slide member movably between a mold release position for projecting one side into the cavity, and a slide member penetrating through the slide member, wherein the molding pin is inserted in a loose fit state, and the slide member is at the molding position. To
Along with forming the hose connection port with the forming pin, the slide member moves relative to the forming pin along with the movement of the slide member to the die removal position, and a gap is formed in the inner periphery of the formed hose connection port opening. And a cavity hole for forming an injection mold.