JP3510326B2 - Injection mold and injection molding method - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to an injection molding method tree butter molded article having excellent strength and dimensional stability, it relates to an injection mold for use therein.

[0002]

2. Description of the Related Art FIG. 15 is a cross-sectional view showing an example of a conventional injection molding method, and FIG. 16 is a schematic view showing the characteristics of a resin molded product by the injection molding method shown in FIG. FIG. 1 is a diagram showing the direction, FIG.
FIG. 7 is a sectional view showing another example of the conventional injection molding method, and FIG.
18A and 18B are schematic diagrams showing the characteristics of a resin molded product obtained by the injection molding method shown in FIG. 17, FIG. 18A showing the orientation direction of the resin, and FIG. 18B showing the state of shrinkage.

In recent years, OA equipment and the like have tended to be required to be light, thin, short, small, and low cost. In response to this tendency, resinification has spread to various products and mechanical parts, and resin molded products are widely used. Has been done.

In injection molding of this resin molded product, conventionally, after molding resin material (for example, thermoplastic resin, thermosetting resin) is heated and melted, as shown in FIG. 15, this molding resin material is used. The resin molding 21 was obtained by injecting 19 into the cavity 20 from the gate 1a of the injection molding die 1 and solidifying it by cooling or heat curing.

[0005]

However, in this case, since the molding resin material 19 is injected in the axial direction (longitudinal direction) of the cavity 20, jetting occurs, so that
As shown in FIG. 16A, the resin orientation of the resin molded product 21 is disturbed. As a result, not only the strength of the resin molded product 21 becomes insufficient, but also the shrinkage of the resin molded product 21 becomes uneven as shown in FIG. 16 (b), so that the dimensional stability is impaired. . Also, the molding resin material 1
In order to smoothly fill 9 into the cavity 20, it is necessary to appropriately provide an air vent (that is, a flow path for discharging the air in the cavity 20 when the molding resin material 19 is filled). Burrs are generated in the resin molded product 21 due to the air vent, and when the resin molded product 21 having a particularly large capacity is used or when the molded resin material 19 that requires high-speed injection is used, the injection of the resin molded product 21 is performed. Molding becomes difficult.

Therefore, as shown in FIG. 17, the gate 1a of the injection molding die 1 is oriented in a direction orthogonal to the axial direction of the cavity 20, and the molding resin material 19 is injected to achieve jetting. Although a method of suppressing the generation is also proposed, in this method, as shown in FIG. 18A, the molding resin material 19 is filled in the cavity 20 while radially extending from the vicinity of the gate 1a as a starting point. Therefore, as shown in FIG. 18B, in the resin molded product 21 portion near the gate 1a, the orientation direction of the resin is still disturbed. Therefore, not only is there a high risk of warping deformation of the resin molded product 21, but also the strength and dimensional stability of the resin molded product 21 do not improve much. Further, the inconvenience that an air vent is required for smooth filling of the molding resin material 19 remains unsolved.

[0007] The present invention has been made in view of the above circumstances, strength and dimensional and injection mold used for the production of a highly stable tree butter molded article, can be manufactured without providing the air vent such resin molded product Another object of the present invention is to provide a simple injection molding method.

[0008]

That is, the invention of the injection mold of the present invention has a mold body (7) in which a cylindrical cavity (20) is formed. Lid (5)
And a resin injection path (5a) is formed in the lid so as to communicate the external space of the mold body with the cavity, and the cavity has the same cross section as the cross section of the cavity. A columnar mold member (9) is provided slidably in the axial direction of the cavity, and when the mold member reaches a predetermined final retracted position (P1), the mold member injects resin into the lid. A mold member fixing device (12) for restraining movement to the path side is provided. In addition, a pressurizing means for urging the mold member (9) toward the resin injection path (5a) of the lid (5) along the axial direction of the cavity (20) is provided. Furthermore, a cylindrical high performance required area (20a) and a predetermined shape high performance non-required area (20b)
A mold body (7) in which a cavity (20) divided into and is formed, a lid (5) is attached to the mold body, and a resin injection path (5a) is attached to the lid. A mold having a columnar shape, which is formed in such a manner that the external space of the cavity and the high performance non-required area of the cavity are communicated with each other, and the cross section of the cavity is the same as the cross section of the high performance required area. A member (9) is provided slidably in the axial direction of the high performance required area, and the mold member is provided on the high performance non-demand area side of the cavity along the axial direction of the high performance required area of the cavity. A mold which is provided with a pressing means for urging and restrains the mold member from moving toward the high performance non-requirement area side of the cavity when the mold member reaches a predetermined final retracted position (P1). A member fixing device (12) is provided and configured.

[0009]

In the invention of the injection molding method of the present invention, when a resin molded article is manufactured using the injection molding die (1), a predetermined amount of the molded resin material (1) heated and melted is used.
9) is injected and filled into the cavity (20) through the resin injection path (5a) of the lid (5) of the injection molding die, and the amount or filling of the molding resin material into the cavity. Mold members (9) depending on pressure or filling time
Is slid in the axial direction of the cavity, and then the molding resin material in the cavity is solidified to produce a resin molded product. Further, when a resin molded article is manufactured using the injection molding die (1), the molding resin material (19) melted by heating is injected into the resin injection path (5a) of the lid (5) of the injection molding die. ) Through the cavity (2
The high performance non-required area (20b) of 0) is injected and filled, and then a predetermined amount of heat-melted molding resin material is passed through the resin injection path of the lid of the injection molding die to achieve high performance of the cavity. The mold member (9) is injected and filled into the required area (20a), and at the same time, the molding resin material is filled into the required area for high performance in accordance with the filling amount, filling pressure or filling time.
Is slid in the axial direction of the high performance required area, and then the molding resin material in the cavity is solidified to manufacture a resin molded product.

The numbers in parentheses are for convenience of showing corresponding elements in the drawings, and the present invention is not limited to the description in the drawings. This also applies to the “claims” and “action” columns.

[0012]

With the above-described structure, in the present invention, when the heat-melted molding resin material (19) is injected and filled into the cavity (20), high performance of the cavity is required at any point from the start of filling to the end of filling. The state where the entire volume of the area (20a) is filled with the molding resin material is maintained, and it works so that no cavity is generated in the high performance required area.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are cross-sectional views showing an embodiment of an injection molding method according to the present invention. FIG. 1A is a diagram showing a state at the time of starting the filling of the molding resin material, and FIG. 1B is a state at the end of the filling of the molding resin material. FIG. 2C is a diagram showing a state when the resin molded product is taken out, FIG. 2 is a schematic diagram showing characteristics of the resin molded product by the injection molding method shown in FIG. 1, and FIG. FIG. 3 is a view showing a direction, FIG. 3B is a view showing a state of shrinkage, FIG. 3 is a sectional view showing another embodiment of the injection molding method according to the present invention, and FIG. , (B) is a diagram showing a state during filling of the molding resin material,
FIG. 4C is a diagram showing a state at the end of filling the molding resin material, FIG. 4 is a sectional view showing yet another embodiment of the injection molding method according to the present invention, and FIG. FIG. 5B is a diagram showing a state during filling of the molding resin material, FIG. 5C is a diagram showing a state at the end of filling the molding resin material, and FIG. It is sectional drawing which shows another Example, (a) is a figure which shows the state at the time of the filling start to the high performance demand area of a molding resin material, (b) is filling the high performance demand area of a molding resin material. 7C, FIG. 6C is a view showing a state at the end of filling the high performance required area of the molding resin material, FIG. 6 is a perspective view of a resin molded product by the injection molding method shown in FIG. 5, and FIGS. FIG. 13 is a diagram showing yet another embodiment of the injection molding method according to the present invention. Sectional view of the left mold, (b) is a perspective view of a resin molded article, FIG. 14 is a graph showing the measurement results of the surface roughness of the resin molded article.

The injection molding die 1 according to the present invention has a cylindrical outer casing 2 as shown in FIG. 1, and a lid 3 is fixed to the left end portion of the outer casing 2 in FIG. At the same time, a lid 5 having a pin gate 5a formed as a resin injection path is fixed to the right end portion of the outer casing 2 in FIG. Further, a flange 6 is formed on the inner surface of the outer casing 2 at a substantially central portion thereof, and an inner casing 7 having a cylindrical cavity 20 is fitted between the flange 6 and the lid 5. A cylindrical mold member 9 is slidably supported in the inner casing 7 in the axial direction of the inner casing 7 (that is, in the arrow A and B directions which are the left and right directions in FIG. 1). A spring 10 is contracted between the cover 9 and the lid 3 so as to constantly urge the mold member 9 in the arrow B direction by its elasticity.

Further, the outer casing 2 is provided with a mold member fixing device 12 for fixing the mold member 9 at a predetermined rearmost retreat position P1, and the mold member fixing device 12 is attached.
Is an engaging claw 13, a pin 15, a spring 16 and a rod 1.
It is composed of 7 etc. That is, the U-shaped engaging claw 13
Is rotatably supported around the pin 15 in the directions of arrows M and N, and one end portion (the upper right end portion in FIG. 1) of the engaging claw 13 is engaged with the notch recess 9a of the mold member 9. Claw 13
a is formed. Further, the other end of the engaging claw 13 (see FIG.
A spring 16 is contracted between the left upper end portion) and the lid 3 so as to constantly urge the engaging claw 13 in the direction of the arrow M by its elasticity. A rod 17 is provided on the left side of FIG. 1 so as to be movable in the directions of arrows C and D.

Since the injection-molding die 1 according to the present invention has the above-described structure, when a cylindrical resin molded product is manufactured using the injection-molding die 1, the following process is performed. Done.

First, as shown in FIG. 1A, the molding resin material 19 heated and melted is injected into the cavity 20 from the pin gate 5a of the lid 5 of the injection molding die 1. Here, as the molding resin material 19, a carbon fiber reinforced liquid crystal polymer or the like can be used. Then, the molding resin material 19 is filled in the cavity 20, and accordingly, the mold member 9 moves in the direction of arrow A against the elasticity of the spring 10.

Thus, when the mold member 9 moves in the direction of arrow A and reaches a predetermined final retracted position P1, as shown in FIG. 1B, the elasticity of the spring 16 constantly urges it in the direction of arrow M. The engaging claw 13a of the engaging claw 13 engages with the notch recess 9a of the mold member 9, so that the mold member 9 is restrained from moving in the arrow B direction. At this point, the step of filling the molding resin material 19 into the cavity 20 is completed.

In this state, the molding resin material 19 in the cavity 20 is solidified into a cylindrical shape by cooling or heat curing. At this time, the mold member 9 receives a pressing force in the right direction in FIG. 1 due to the elastic restoring force of the spring 10, but the mold member fixing device 12 restrains the mold member 9 from moving in the arrow B direction. Since it is possible to prevent the compressive stress from acting as a residual stress on the molding resin material 19 in the cavity 20 via 9, the residual stress causes the molding resin material 1 to move.
It is possible to prevent occurrence of a situation in which distortion or the like occurs in 9.

In this way, when the molding resin material 19 is solidified into a cylindrical shape to form a resin molded product 21, the resin molded product 21 is taken out from the injection molding die 1. To this end, as shown in FIG. 1C, the rod 17 is moved in the arrow D direction to rotate the engagement claw 13 in the arrow N direction. Then,
Since the claw portion 13a, which has been engaged with the notched concave portion 9a of the mold member 9 until then, comes off, the mold member 9 and the resin molded product 21
Is pushed rightward in FIG. 1 by the elastic restoring force of the spring 10. At this point, the manufacturing of the cylindrical resin molded product 21 using the injection molding die 1 is completed.

The cylindrical resin molded product 2 manufactured in this manner
As shown in FIG. 2 (a), the resin No. 1 exhibits sufficient strength because the resin orientation directions are aligned in a fixed direction (axial direction) and, as shown in FIG. 2 (b), Since it shrinks into a straight line, the straightness is good, there is no risk of warp deformation, and the dimensional stability is excellent. In addition, since the air vent is not required, it is possible to prevent the occurrence of burrs due to the air vent and the entrapment of air in the cavity 20, and when the resin molded product 21 having a large capacity is made or high-speed injection is required. Even when the molding resin material 19 that is used is used, injection molding of the resin molded product 21 can be easily performed.

In order to confirm the above effects, a resin molded product 21 is manufactured by using a carbon fiber reinforced liquid crystal polymer as the molding resin material 19. The resin molded product 21 has rigidity, a linear expansion coefficient in the axial direction, and a molding. When the shrinkage rate and the surface roughness were measured, the rigidity was 2-3 times that of the conventional product, and the linear expansion coefficient (60 ° C) in the axial direction was approximately 1 × 10 ^-5 cm / cm ° C of the conventional product. 0.35 × 10 ^-5 cm
It became as small as / cm ° C. Further, the molding shrinkage ratio was also reduced, and the surface roughness was suppressed to about 2 μm, about 1/5, as compared to about 10 μm for the conventional product, as shown in FIG. As a result, the sliding characteristics of the resin molded product 21 in the circumferential direction are improved, and the abrasion resistance is excellent.

In the above-mentioned embodiment, the injection molding die 1 provided with the die member fixing device 12 is explained, but the molding is performed by the elastic restoring force of the spring 10 after the completion of the filling of the molding resin material 19. When it is not necessary to prevent the compressive stress from acting on the resin material 19, as shown in FIG. 3, the mold member fixing device 12 can be omitted, so that the structure of the injection molding mold 1 can be simplified. Can be converted.

Further, in the above-described embodiment, the case where the spring 10 is used as the pressurizing means has been described, but a pressurizing means such as a hydraulic mechanism may be used instead of the spring 10.
Further, as shown in FIG. 4, it is possible to omit the pressing means. It goes without saying that the structure of the injection-molding die 1 can be simplified if the pressing means is omitted.

Further, in the above-mentioned embodiment, the case where the cylindrical resin molded product 21 is manufactured has been described, but various shapes can be obtained by appropriately changing the shapes of the cavity 20 of the inner casing 7 and the mold member 9. A resin molded product 21 having a shape and properties can be manufactured.

For example, as shown in FIG. 5, the inside of the cavity 20 of the inner casing 7 is divided into a cylindrical high performance required area 20a and a cylindrical high performance non-required area 20b. By filling the high performance required area 20a subsequent to filling 20b,
As shown in FIG. 6, it is possible to obtain a resin molded product 21 in which two cylindrical leg portions are integrally molded on a cylindrical body portion. In this case, each leg portion is a highly oriented portion 21a in which the resin orientation direction is constant, and the body portion is a low orientation portion 21b in which the resin orientation direction is indefinite.

Further, as shown in FIGS. 7 to 13, a resin molded product 21 used for a rotor, a gear, or a shaft material or a pipe material having a multi-layer (two or more layers) structure may be manufactured by the same procedure. It is possible. Here, FIG. 12 shows the mold body 7
It means that there is a small gap between the mold member 9 and the mold member 9, but the orientation of the molding resin material 19 present in this gap is improved. Although the gate used here is the pin gate 5a, any type of gate may be adopted as long as it is a known gate.

[0028]

As described above, the injection of the present invention
According to the invention of a molding die, a molding resin material which is heated and melted
When injection and filling 19 into the cavity 20, start filling
Cavity 20 at any time from
Of the high performance required area 20a of
Within the high-performance required area 20a, the charged state is maintained.
Since no cavity is created in the
Can you prevent jetting?
It is possible to obtain a resin molded product 21 having high orientation.
It

[0029]

Further, according to the invention of the injection molding method of the present invention, the molding resin material 19 which is heated and melted is used in the cavity 2.
When injection filling into 0, the state in which the entire volume of the high performance required area 20a of the cavity 20 is filled with the molding resin material is maintained at any time from the start of filling to the end of filling, and the high performance required area 20a is maintained. Since no cavity is formed inside, jetting during the filling process of the molding resin material 19 can be prevented, so that it is possible to obtain a resin molded product 21 with high orientation.

[Brief description of drawings]

1A and 1B are cross-sectional views showing an embodiment of an injection molding method according to the present invention, in which FIG. 1A is a diagram showing a state at the time of starting the filling of a molding resin material, and FIG. The figure which shows a state, (c) is a figure which shows the state when taking out a resin molded product.

2A and 2B are schematic diagrams showing the characteristics of a resin molded product obtained by the injection molding method shown in FIG. 1, in which FIG. 2A is a diagram showing a resin orientation direction, and FIG. 2B is a diagram showing a state of shrinkage.

3A and 3B are cross-sectional views showing another embodiment of the injection molding method according to the present invention, FIG. 3A showing a state at the time of starting the filling of the molding resin material, and FIG. FIG. 6C is a diagram showing a state, and FIG. 7C is a diagram showing a state at the end of filling the molding resin material.

4A and 4B are cross-sectional views showing still another embodiment of the injection molding method according to the present invention, in which FIG. 4A shows a state at the time of starting the filling of the molding resin material, and FIG. FIG. 4C is a diagram showing a state when the filling of the molding resin material is completed.

5A and 5B are cross-sectional views showing still another embodiment of the injection molding method according to the present invention, FIG. 5A is a view showing a state at the time of starting the filling of a molding resin material into a high performance required area, and FIG. FIG. 6 is a diagram showing a state in which the molding resin material is being filled into the high performance required area, and FIG. 7C is a diagram showing a state at the end of filling the molding resin material into the high performance required area.

FIG. 6 is a perspective view of a resin molded product obtained by the injection molding method shown in FIG.

FIG. 7 is a diagram showing still another embodiment of the injection molding method according to the present invention, in which (a) is a cross-sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 8 is a view showing still another embodiment of the injection molding method according to the present invention, in which (a) is a cross-sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 9 is a view showing still another embodiment of the injection molding method according to the present invention, in which (a) is a sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 10 is a diagram showing still another embodiment of the injection molding method according to the present invention, in which (a) is a cross-sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 11 is a view showing still another embodiment of the injection molding method according to the present invention, in which (a) is a cross-sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 12 is a view showing still another embodiment of the injection molding method according to the present invention, in which (a) is a sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 13 is a view showing still another embodiment of the injection molding method according to the present invention, in which (a) is a sectional view of an injection molding die;
(B) is a perspective view of a resin molded product.

FIG. 14 is a graph showing the measurement results of the surface roughness of a resin molded product.

FIG. 15 is a cross-sectional view showing an example of a conventional injection molding method.

16A and 16B are schematic diagrams showing the characteristics of a resin molded product obtained by the injection molding method shown in FIG. 15, in which FIG. 16A is a diagram showing the orientation direction of the resin and FIG.

FIG. 17 is a cross-sectional view showing another example of a conventional injection molding method.

18A and 18B are schematic views showing the characteristics of the resin molded product by the injection molding method shown in FIG. 17, where FIG. 18A is a diagram showing the orientation direction of the resin, and FIG. 18B is a diagram showing the state of shrinkage.

[Explanation of symbols]

1 ... Injection mold 5 ... Lid 5a: Resin injection path (pin gate) 7: Mold body (inner casing) 9: Mold component 10 ... Pressurizing means (spring) 12 ... Mold member fixing device 19: Molding resin material 20 ... Cavity 20a ... High performance required area 20b ... High performance non-required area 21: Resin molded product 21a: highly oriented portion 21b ... low orientation part P1 …… Last retreat position

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-266632 (JP, A) JP-A-62-124306 (JP, A) JP-A-5-162170 (JP, A) JP-A-3- 138122 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 45/26-45/37

Claims (9)

(57) [Claims] 1. A cylindrical cavity (20) is formed.
It has a mold body (7) , a lid (5) is mounted on the mold body, and a resin injection path (5a) is provided on the lid outside the mold body.
Is formed so as to communicate between the cavity and the cavity, and the same cross section as the cross section of the cavity is formed in the cavity.
A columnar mold member (9) having a surface is attached to the shaft of the cavity.
A state in which the die member has reached a predetermined final retracted position (P1) by being provided slidably in the axial direction.
The mold member moves to the resin injection path side of the lid.
A mold member fixing device (12) for restraining
Injection mold. 2. The mold member (9) is attached to the cavity (20).
To the resin injection path (5a) side of the lid (5) along the axial direction
2. The pressurizing means for urging is provided, as set forth in claim 1.
Mold for injection molding. 3. A cylindrical high performance required area (20a) and a location.
Divided into a high-performance non-requirement area (20b) of a fixed shape
It has a mold body (7) in which a cavity (20) is formed.
Then , a lid (5) is attached to the die body, and a resin injection path (5a) is attached to the lid to an outer space of the die body.
To communicate with the high performance non-required area of the cavity
In the shape of a cavity, and within the high-performance required area of the cavity, the high-performance required
Columnar mold member having the same cross section as the cross section of the area
Sliding (9) in the axial direction of the high performance required area
Provide the mold member with the axis of the high performance required area of the cavity
High performance non-requirement area side of the cavity along the axial direction
A state in which a pressing means for urging the mold member is provided and the mold member reaches a predetermined final retracted position (P1).
The mold member is a high performance non-required area of the cavity.
The mold member fixing device (12) for restraining the movement to the side
An injection molding die configured and provided. 4. The injection molding according to claim 1 or 2.
In producing a tree fat moldings by using a mold (1), the injection of the heated molten predetermined amount of the molding resin material (19)
Via the resin injection path (5a) of the lid (5) of the molding die
It is injected and filled in the cavity (20), and
Mold member according to the filling amount of shaped resin material into the cavity
(9) is slid in the axial direction of the cavity , and then the molding resin material in the cavity is solidified.
Injection molding method configured to manufacture resin molded products
Law. 5. The injection molding according to claim 1 or 2.
When a resin molded product is manufactured using the mold (1), a predetermined amount of the molded resin material (19) heated and melted is injected.
Via the resin injection path (5a) of the lid (5) of the molding die
It is injected and filled in the cavity (20), and
Mold part according to the filling pressure of shaped resin material into the cavity
The material (9) is slid in the axial direction of the cavity , and then the molding resin material in the cavity is solidified.
Injection molding method configured to manufacture resin molded products
Law. 6. The injection molding according to claim 1 or 2.
When a resin molded product is manufactured using the mold (1), a predetermined amount of the molded resin material (19) heated and melted is injected.
Via the resin injection path (5a) of the lid (5) of the molding die
It is injected and filled in the cavity (20), and
Mold part according to the filling time of shaped resin material into the cavity
The material (9) is slid in the axial direction of the cavity , and then the molding resin material in the cavity is solidified.
Injection molding method configured to manufacture resin molded products
Law. 7. A mold (1) for injection molding according to claim 3.
When manufacturing a resin molded product using the molded resin material (19) that has been heated and melted, the injection molding gold is used.
Cavite via the resin injection path (5a) of the mold lid (5)
Injection into high performance non-required area (20b)
Filled with heat , and then heated and melted a prescribed amount of molding resin material
High-performance of the cavity through the resin injection route type of lid
Injecting and filling the required area (20a),
Depending on the filling amount of molding resin material into the high performance required area
Slide the mold member (9) in the axial direction of the high performance required area.
And then solidify the molding resin material in the cavity.
Injection molding method configured to manufacture resin molded products
Law. 8. A mold (1) for injection molding according to claim 3.
When manufacturing a resin molded product using the molded resin material (19) that has been heated and melted, the injection molding gold is used.
Cavite via the resin injection path (5a) of the mold lid (5)
Injection into high performance non-required area (20b)
Filled with heat , and then heated and melted a prescribed amount of molding resin material
High performance of the cavity through the resin injection path of the mold lid
Injecting and filling the required area (20a),
Depending on the filling pressure of the molding resin material into the high performance required area
The mold member (9) in the axial direction of the high performance required area.
Slide, and then solidify the molding resin material in the cavity
Injection molding method configured to manufacture resin molded products
Law. 9. A mold (1) for injection molding according to claim 3.
When manufacturing a resin molded product using the molded resin material (19) that has been heated and melted, the injection molding gold is used.
Cavite via the resin injection path (5a) of the mold lid (5)
Injection into high performance non-required area (20b)
Filled with heat , and then heated and melted a prescribed amount of molding resin material
High performance of the cavity through the resin injection path of the mold lid
Injecting and filling the required area (20a),
Depending on the filling time of the molding resin material into the high performance required area
The mold member (9) in the axial direction of the high performance required area.
Slide, and then solidify the molding resin material in the cavity
Injection molding method configured to manufacture resin molded products
Law.