JP2003011175A - Valve gate type mold assembly and molding method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of processings in the direction inclined to a mold on-off direction when the valve pin inclined in the mold on-off direction is moved linearly and to enable the stable operation of the valve pin. SOLUTION: A movable member 86 is provided to a fixed mold 31 so as to be movable in the mold on-off direction A. A slide member 91 is provided to the movable member 86 so as to be movable in the direction B crossing the mold on-off direction A at a right angle. A valve pin 61 is connected to the slide member 91 and the slide member 91 is guided by the guide member 101 parallel to the valve pin 61. The movable member 86 is moved in the mold on-off direction A and the slide member 91 is moved in the direction B crossing the mold on-off direction A at a right angle with respect to the movable member 86 to move the inclined valve pin 61 linearly. Since the movable member 86 moved in the mold on-off direction A and the slide member 91 moved in the direction B crossing the mold on-off direction A at a right angle are used, the processing of the members 86 and 91 may be mainly performed in the mold on-off direction A and the direction B crossing the mold on-off direction A at a right angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve gate mold apparatus used for injection molding of thermoplastic resin and a molding method using the same.

[0002]

In a hot runner mold apparatus, a resin, which is a molding material in a material passage to a gate to a product cavity, is heated to constantly maintain a molten state,
2. Description of the Related Art A valve gate type mold device is known in which a gate is mechanically opened and closed by a valve pin which is a valve body. The hot runner mold device is intended to increase the molding efficiency, and the gate is closed to prevent the resin from leaking from the gate when the mold is opened.

Here, a product (molded product) as shown in FIG.
Consider forming 1. This product 1 has a cylindrical main body 2 and a taper 3 at one end of the main body 2.

FIG. 6 shows an example of a valve gate type mold device which is considered for molding the product 1. This valve gate type mold device is a fixed mold which is a pair of mold bodies that move in the vertical direction (mold opening and closing direction A) shown in the drawing to open and close.
11 and the movable die 12 are provided, and the fixed die 11 and the movable die 12 form a product cavity 13 having the shape of the product 1 therebetween when the die is closed. The product cavity 13 has the axial direction of the product 1 aligned with the mold opening / closing direction A, and the side where the taper portion 3 is located is the fixed mold 11 side, particularly for the convenience of releasing the product 1. This is a common setting. The fixed mold 11 forms a surface corresponding to the outer surface of the product 1 in the product cavity 13 by the fixed side mold plate 14, and the movable mold 12 forms the product 1 in the product cavity 13.
The surface corresponding to the inner surface of is formed by the core 15.

The fixed mold 11 has a product cavity.
Hole-shaped gate 16 which is the resin inlet to 13 is the fixed side template
A valve device 17 for opening and closing the gate 16 is incorporated while being formed in 14. This valve device 17
Has a substantially cylindrical valve casing 19 incorporated in an assembling hole 18 formed in the fixed-side template 14 and having the gate 16 at its tip. This valve casing 19
A material passage 21 communicating with the product cavity 13 via the gate 16 is formed inside, and a heater 22 for heating the material passage 21 is provided on the outer peripheral portion. Both the gate 16 and the material passage 21 have the mold opening / closing direction A as an axial direction and face each other. Further, inside the valve casing 19, a substantially columnar valve pin 23 is provided as a valve body whose axial direction is the mold opening / closing direction A.

The valve pin 23 moves linearly in the axial direction to open and close the gate 16 by driving a hydraulic cylinder device (not shown), etc. It has a portion 24 at its tip. Not only the one shown in FIG. 6 but also the conventional valve gate type mold device has the axial direction of the valve pin aligned with the mold opening / closing direction.

At the time of molding, the fixed mold 11 and the movable mold 12
After closing the molds and forming the product cavity 13 between the fixed mold 11 and the movable mold 12, the valve pin 23 is moved in the direction away from the movable mold 12 to open the gate 16. Then, a molten thermoplastic resin, which is a thermoplastic molding material, is injected into the fixed mold 11 from the injection molding machine. This resin flows through the material passage 21 from the gate 16 into the kelp making cavity 13. After the resin is filled in the product cavity 13 in this way, the valve pin 23 moves toward the movable die 12 after holding pressure, and the gate closing portion 24 of the valve pin 23 fits into the gate 16 and the gate is closed. Close 16 Then, after the resin in the product cavity 13 is cooled and solidified, the fixed mold 11 and the movable mold are
12 and 12 are opened, and the resin in the product cavity 13, that is, the molded product 1 is taken out. Thereafter, the mold is closed again and the above molding cycle is repeated. Throughout the entire molding cycle, the resin in the material passage 21 is constantly kept in a molten state by the heating of the heater 22.

In the case of the product 1 having the shape shown in FIG. 6, if the axial direction of the valve pin 23 is aligned with the mold opening / closing direction A, the position where the gate 16 can be opened with respect to the product cavity 13 is the tapered portion. Only the position corresponding to 3,
In this case, the open surface of the gate 16 in the product cavity 13 becomes an inclined surface 13A inclined with respect to the mold opening / closing direction A.

However, when the gate 16 is opened to the inclined surface 13A in the product cavity 13 as described above, the axial direction of the valve pin 23 coincides with the mold opening / closing direction A, so that the gate of the valve pin 23 forming the product cavity 13 is formed. Block 24
The front end surface 24A of the valve must be inclined with respect to the axial direction of the valve pin 23. Therefore, the valve pin 23 must be accurately positioned with respect to the gate 16 in the circumferential direction (rotational direction), and the positioning of the valve pin 23 becomes troublesome.

Further, the pressure of the resin filled in the product cavity 13 is controlled by the valve pin 23 forming the product cavity 13.
It acts in a direction B orthogonal to the front end surface 24A of the valve pin 23. However, since this direction B does not coincide with the axial direction A of the valve pin 23, a force is also applied to the valve pin 23 in its radial direction. The direction A,
If the difference angle of B is within ± 5 °, the valve pin
Although the force applied in the radial direction of 23 is small and is not a serious problem, in the case of the illustrated product 1, the angle α of the difference between the directions A and B (the taper portion 3 with respect to the plane orthogonal to the mold opening / closing direction A) is used.
Surface, that is, the inclination angle of the inclined surface 13A) is considerably large, so that the force applied in the radial direction of the valve pin 23 is also considerably large. As a result, on the outer peripheral surface 25 of the taper portion 3, the side surface of the gate blocking portion 24 of the valve pin 23 is pressed against the side surface of the gate 16, and the gate blocking portion 24 of the valve pin 23 or the side surface of the gate 16 is abraded. It will be easier. Then, when the gate blocking portion 24 of the valve pin 23 or the side surface of the gate 16 is worn, burrs are likely to be generated in the trace of the gate in the product 1.

Therefore, although not known, it is conceivable to make the moving direction of the valve pin 23 substantially orthogonal to the inclined surface 13A of the product cavity 13 in which the gate 16 is opened, as shown in FIG. In FIG. 7, parts corresponding to those in FIGS. 5 and 6 are designated by the same reference numerals.

According to this structure, the gate 16 is opened on the inclined surface 13A which is inclined with respect to the opening / closing direction of both molds in the product cavity 13, but the gate 16 is inserted into and removed from the gate 16 by moving linearly. Since the moving direction of the valve pin 23 that freely fits to open and close the gate 16 is substantially orthogonal to the inclined surface 13A, the pressure of the molding material filled in the product cavity 13 is against the valve pin 23. It acts in that direction of movement and not in any other direction. That is, the pressure of the molding material in the product cavity 13 is
It does not act to increase the friction between the 16 sides. As a result, wear of the valve pin 23 and the gate 16 is suppressed. At the same time, even if the valve pin 23 rotates in the circumferential direction with respect to the gate 16, the unevenness does not occur on the surface of the product cavity 13 formed by the valve pin 23.

By the way, in the mold apparatus of this type, in consideration of the productivity of the mold member, the axial direction of the valve pin is made to coincide with the mold opening / closing direction, and the mold constituent members are arranged in the mold opening / closing direction and the direction orthogonal thereto. For example, in the case of a block-shaped member that is manufactured mainly by processing, it is advantageous in terms of ensuring dimensional accuracy that it is configured with side surfaces parallel to the mold opening / closing direction and surfaces orthogonal to these side surfaces. Further, it is advantageous that the moving direction is also the mold opening / closing direction or a direction orthogonal to the mold opening / closing direction. For example, in the case of a valve pin, its axial direction matches the mold opening / closing direction,
The valve pin is configured to move in the mold opening / closing direction, or a slide core in a direction orthogonal to the mold opening / closing direction.

On the other hand, in the valve gate type mold device shown in FIG. 7, in addition to the valve device, a driving device such as a cylinder device for driving the valve device must be provided obliquely to the mold opening / closing direction. Occurs. For this reason, it is necessary to perform machining at the drive device and the position where the drive device is installed, which is inclined with respect to the mold opening / closing direction, which requires a much longer machining time than machining in the mold opening / closing direction or a direction orthogonal thereto.

The present invention is intended to solve such a problem, and when linearly moving a valve body inclined in the mold opening / closing direction, it is possible to reduce machining in the mold opening / closing direction and the inclination direction. It is an object of the present invention to provide a valve gate type mold device capable of performing stable operation of a valve pin and a molding method using the same.

[0016]

In order to achieve the above object, a valve gate type mold apparatus according to the present invention comprises a pair of mold bodies which are opened and closed to form a product cavity between them when the mold is closed. A valve device for opening and closing a gate for communicating a material passage provided in the mold body with the product cavity, wherein the valve device is constructed by linearly moving a valve body inclined with respect to a mold opening / closing direction. A valve gate type mold device which opens and closes the gate and includes means for moving the valve body, wherein the moving means is provided in the mold body and is movable in a mold opening and closing direction with respect to the mold body. The movable member, the slide member provided on the movable member so as to be movable in the direction orthogonal to the mold opening / closing direction, and the connecting portion that connects the slide member and the valve body.

At the time of molding, a pair of molds are closed to form a product cavity between these molds, the valve body is removed from the gate to open the gate, and the material passage is molded into the product cavity through the gate. Fill with material. Then, the valve body of the valve device is fitted to the gate to close the gate, and after the molding material in the product cavity is solidified, the mold is opened to take out the molding material in the product cavity, that is, the molded product. Then, the mold is closed again and the above molding cycle is repeated.

As described above, during the molding cycle, the moving means linearly moves the velve member inclined in the mold opening / closing direction to open / close the gate. Then, in the moving means, the movable member is moved in the mold opening / closing direction, and the slide member is moved relative to the movable member in a direction orthogonal to the mold opening / closing direction, whereby the slide member moves in the inclination direction of the valve body, The valve body connected to the slide member can be moved linearly.

Therefore, although the valve body is inclined in the mold opening / closing direction, the moving means is composed of a movable member which moves in the mold opening / closing direction and a slide member which moves in the movable member in a direction orthogonal to the mold opening / closing direction. Therefore, the processing of these members is mainly performed in the mold opening / closing direction and the direction orthogonal thereto.

According to a second aspect of the present invention, a pair of molds which are opened and closed to form a product cavity between the molds when the molds are closed, and a gate which connects a material passage provided in the molds to the product cavity are opened and closed. And a valve device, wherein the valve device opens and closes the gate by linearly moving a valve body inclined with respect to a mold opening and closing direction, and a valve gate type mold device including a moving means for the valve body. The moving means includes a guide member provided on the mold body and parallel to the valve body, and a slide member having an engaging portion that engages with the guide member and movable along the guide member. A movable member that has a guide portion that guides the slide member in a direction orthogonal to the mold opening / closing direction and that is movable in the mold opening / closing direction with respect to the mold body; the slide member and the valve body; In which and a coupling portion coupling.

By moving the movable member in the mold opening / closing direction and moving the slide member relative to the movable member in the direction orthogonal to the mold opening / closing direction, the slide member moves in the mold opening / closing direction and the tilt direction, and the slide member is moved. The valve body connected to is moved linearly. At this time, a guide member parallel to the valve body is provided on the mold body, and an engaging portion engages with the guide member to move the slide member in parallel in an oblique direction. Therefore, the slide member is orthogonal to the mold opening / closing direction with respect to the movable member. The valve body is smoothly moved in the direction in which the valve body moves, which stabilizes the movement of the valve body.

According to a third aspect of the invention, in the valve gate mold apparatus according to the second aspect of the invention, the slide member is rotatably provided with an engaging member having the engaging portion.

The slide member is guided in the length direction of the guide member and in the movable member in a direction orthogonal to the mold opening / closing direction, or by providing an engaging member included in the guide member on the slide member so as to be rotatable. The operation is stable without applying excessive force to the slide member and the guide member.

In order to achieve the above-mentioned object, a molding method using a valve gate type mold device according to a fourth aspect of the present invention closes a pair of mold bodies which are opened and closed with each other and forms a product cavity between these mold bodies. Forming, filling the molding material into the product cavity through the gate opened to the product cavity from the material passage provided in the mold, and filling the molding cavity into the product cavity except when the molding material is filled. A valve unit of the valve device, the valve unit is provided so as to be inclined in the mold opening and closing direction, and the valve unit is linearly moved so that the valve unit is removably fitted into the gate to open and close the gate. A method, wherein a movable member is provided on a mold body provided with the valve device so as to be movable in a mold opening / closing direction,
A slide member is provided on the movable member so as to be movable in a direction orthogonal to the mold opening / closing direction, and the slide member is moved in a direction orthogonal to the mold opening / closing direction by moving the movable member with respect to the mold body in the mold opening / closing direction. Is to move the valve body.

By moving the movable member with respect to the mold body in the mold opening / closing direction, the slide member is moved in a direction orthogonal to the mold opening / closing direction, and by moving the slide member, the valve body is moved to open / close the gate.

As described above, since the movable member moves in the mold opening / closing direction and the sliding member moves in the movable member in the direction orthogonal to the mold opening / closing direction, the processing of these members is performed mainly in the mold opening / closing direction and the orthogonal direction. It's enough.

According to a fifth aspect of the present invention, in the molding method using the valve gate mold apparatus according to the fourth aspect, a guide member parallel to the valve body is provided on the mold body, and the guide member is provided along the guide member. The slide member is moved.

Since the slide member moves obliquely in parallel along the guide member, the movement of the slide member relative to the movable member in the direction orthogonal to the mold opening / closing direction is smoothly performed.
This stabilizes the movement of the valve body.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a valve gate type mold apparatus and a molding method using the same according to the present invention will be described below with reference to FIGS. The molded product 1 is the one shown in FIG. 5 described above.

First, the structure of the valve gate mold apparatus will be described.

Reference numeral 31 is a fixed die, 32 is a movable die, and these fixed die 31 and movable die 32, which are die bodies, move in the vertical direction (die opening / closing direction A) shown in FIG. A plurality of product cavities 33 in the shape of the product 1 are formed between each other. The product cavity 33 has the axial direction of the product 1 aligned with the mold opening / closing direction A and the taper portion 3
The side with is the fixed mold 31 side.

The fixed mold 31 includes a first fixed mold plate 36,
A second fixed-side mold plate 37 fixed to the surface of the first fixed-side mold plate 36 opposite to the movable mold 32 is provided. These fixed side mold plates 36 and 37 are the products in the product cavity 33.
The surface corresponding to the outer surface of 1 is formed. Further, on the surface of the second fixed-side mold plate 37 opposite to the movable mold 32,
The manifold 38 is fixedly installed. The manifold 38
A runner 39, which is a material passage for branching into a plurality of product cavities 33, is formed inside, and a heater (not shown) for heating the runner 39 is provided therein.

A valve device incorporating hole 41 is formed in the second stationary mold plate 37. The tip of the valve device incorporating hole 41 is a hole-shaped gate 42 that opens at a position corresponding to the tapered portion 3 of the product 1 in the product caviten 33. Therefore, the product cavity 33
The open surface of the gate 42 in FIG. 2 is an inclined surface 33A inclined with respect to the mold opening / closing direction A. Further, the valve device incorporating hole 41 including the gate 42 has a substantially rotating body shape, and the axial direction C thereof is a direction orthogonal to the inclined surface 33A. Therefore, the axial direction C of the valve device incorporating hole 41 and the gate 42 is inclined at an inclination angle α with respect to the mold opening / closing direction A.

A valve casing 44 of a valve device 43 for opening and closing the gate 42 is incorporated in the valve device incorporating hole 41. Next, this valve device
The configuration of 43 will be described. The valve casing 44
Has a substantially cylindrical shape with the direction C as the axial direction,
It has a flange portion 45 at the base end. This flange part 45
Is fitted and fixed in the valve device incorporating hole 41, but a flat surface 46 orthogonal to the mold opening / closing direction A is formed in the upper part of the drawing. The flat surface 46 is joined to the manifold 38.

A material passage 51 is formed in the valve casing 44 to connect the runner 39 of the manifold 38 to the product cavity 33 via the gate 42. Most of the material passage 51 extends in the axial direction C of the valve casing 44 and is coaxially opposed to the gate 42, but one end portion of the material passage 51 is a bent portion 52 and the flange portion is formed.
It opens to the flat surface 46 of 45. The bent portion 52 communicates with the runner 39. Also, valve casing
A heater 53 that heats the material passage 51 is provided on the outer peripheral surface of 44, and a cylindrical heater cover 54 that covers the heater 53 from the outer peripheral side is provided. further,
The valve casing 44 is provided with a temperature sensor 55 along the inside of the beater 53. It should be noted that the tip portion of the valve casing 44 on the gate 42 side is partially supported by being fitted to a fitting surface 56 formed in the valve device incorporating hole 44. In other portions, a gap is formed between the valve casing 44 or the heater cover 54 and the second fixed-side mold plate 37 for heat insulation.

Further, the material passage of the valve casing 44
A substantially columnar valve pin 61 is provided as a valve body that penetrates the inside of the shaft 51 coaxially and opens and closes the gate 42. The valve pin 61 has the same axial direction C as the gate 42 and the valve casing 44, and moves linearly in the axial direction C, and the gate closing portion 62 is removably fitted into the gate 42. Has at the tip.
The front end surface 62A of the gate closing portion 62 is formed by the product cavity 33.
However, since the axial direction C of the valve pin 61 is orthogonal to the inclined surface 33A as described above, the tip surface 62A of the gate closing portion 62 also has the valve pin 61. It is orthogonal to the axial direction C of. further,
The valve pin 61 is a guide bush fixed to the flange portion 45 of the valve casing 44 with a bolt (not shown).
While penetrating slidably through 64, the tip end on the gate 42 side is always slidably fitted inside a plurality of support blades 65 formed on the peripheral surface of the material passage 51. As a result, the valve pin 61 is supported by the valve casing 44. Further, the base end portion 66 of the valve pin 61 is inserted through an insertion hole 38A formed in the manifold 38 and connected to a moving means of the valve pin 61 described later.

The movable mold 32 has the first fixed mold plate 36.
A movable side template (not shown) that abuts against is fixed to the movable side template, which forms a surface corresponding to the inner surface of the product 1 in the product cavity 33. Further, although not shown, the movable side receiving plate is fixed to the surface of the movable side template opposite to the fixed mold 31.
On the surface of the movable side receiving plate opposite to the fixed die 31,
A movable side mounting plate attached to a movable side platen of the injection molding machine is fixed via a spacer block.
Further, the movable die 32 is also provided with a protrusion mechanism for ejecting the molded product 1 from the movable die 32.

The fixed mold 31 is composed of the first fixed mold plate 37.
A spacer block 81 is fixed to a surface (other side surface) opposite to the movable die 32 in, a spacer fixing receiving plate 82 is fixed to the other side surface of the spacer block 81, and a spacer block 83 is fixed to the other side surface of the spacer fixing receiving plate 82. Is fixed, and the fixed side mounting plate 84 is fixed to the other side surface of the spacer block 83. Further, although not shown, a fixed platen of the injection molding machine is attached to the fixed side mounting plate 84.

A moving means 85 for the valve pin 61 is provided on the base end side of the valve pin 61. This transportation 85
Has a movable member 86 movable in the mold opening / closing direction A with respect to the fixed mold 31. A guide pin 87 in the mold opening / closing direction A is projected on one side surface of the fixed side mounting plate 84, and the movable member 85 is movable in the mold opening / closing direction A along the guide pin 87. This movable member 85 has a mold opening / closing direction A.
Is provided with a pair of block bodies 88 and 89 that are fixed by being superposed on each other.
A slide guide groove 90 in a direction orthogonal to the mold opening / closing direction (orthogonal direction B) is formed in one block body 89, and a block-shaped slide member 91 extends along the slide guide groove 90 in a direction B orthogonal to the mold opening / closing direction. It is provided to be movable. still,
The slide member 91 moves in a direction B which is parallel to a plane including the axis of the valve pin 61 and orthogonal to the mold opening / closing direction. The block bodies 88 and 89 and the slide member 91 are attached to the mold opening / closing direction A
Through holes 88A, 89A, and 90A, respectively, and through the through holes 87A, the base end portion 66 of the valve pin 61 is connected to the connecting portion.
It is connected to the slide member 91 at 92. Further, a driving means 93 for reciprocating the moving means 85 in the mold opening / closing direction A is provided, and this driving means 93 is constituted by a fluid pressure cylinder device or the like, and has a drive shaft 94 in the mold opening / closing direction A.

The slide member 91 is attached to the valve pin 61.
Guide member 101 for guiding the parallel movement in the axial direction C of
Equipped with. The guide member 101 has the through holes 88A, 89.
It is provided in parallel with the valve pin 61 through A and 90A, and both ends are fixed to the spacer fixing receiving plate 82 and the fixed side mounting plate 84 by pins 102 and 102. Since the position of the spacer fixed receiving plate 82 and the fixed side mounting plate 84 is fixed, the guide member 101 is positioned with respect to the spacer fixed receiving plate 82 and the fixed side mounting plate 84, The both ends of the guide member 101 are fixed by the pins 102, 102 in order to facilitate the work of setting the inclination of the guide member 101 according to the inclination angle α of the valve pin 61 when the inclination angle α is different. Further, the guide member 101 is provided with a slide cylindrical body 103 as an engaging member so as to be movable along the guide member 101, and the slide cylindrical body 103 has the guide member 101 at an engaging portion 104 as an engaging portion. It is inserted.
The outer periphery of the guide member 101 is circular, and the slide cylinder 1
Since the engaging hole 104 of 03 is also circular, the slide cylinder 103 is rotatable around the axis of the guide member 101. Pivot pins 105, 10 which are pivot parts on the side surface of the slide cylinder 103.
5 is provided in a projecting manner, and corresponding to these pivot pins 105, 105, receiving hole portions 106, 106 are provided on the inner peripheral surface of the through hole 91A of the slide member 91.
A pivot pin 105 is inserted into the receiving hole 106, and the slide cylinder 103 is rotatable about the pivot pins 105, 105. The length direction of the pivot pin 105 is the direction B orthogonal to the mold opening / closing direction and the direction orthogonal to the plane including the axis of the valve pin 61.

Reference numeral 111 in the drawing is a regulating member which regulates the movement of the movable member 86 toward the gate 42 side when the movable member 86 abuts, and is fixed to the spacer fixing receiving plate 82.

Next, an injection molding method using the valve gate mold apparatus will be described. At the time of molding, first, the fixed die 31 and the movable die 32 are closed, and a product cavity 33 is formed between the fixed die 31 and the movable die 32. Then, as shown by a chain line in FIGS. Cylinder device 67
The gate 42 is opened by retracting the valve pin 61 in the direction away from the product cavity 33 by driving and removing the gate closing portion 62 of the valve pin 61 from the gate 42.
Then, a molten thermoplastic resin, which is a thermoplastic molding material, is injected from the injection molding machine into the fixed mold 31. The resin passes through the runner 39 of the manifold 38, the material passages 51 in the valve casing 44, the support vanes 65 in which the valve pins 61 are fitted, and the columnar portion 66, and the gate 42 to the product cavity 33. Flow into. After the resin is filled in the product cavity 33 in this way, the pressure is maintained, and as shown by the solid line in FIGS.
Moves toward the product cavity 33, and its gate closing portion 62 fits into the gate 42 to close the gate 42.

The gate 42 is opened / closed by moving the valve pin 61 inclined with respect to the mold opening / closing direction A by the moving means 85 in a straight line. Movable member 86 of moving means 85
Is moved in the mold opening / closing direction A by the driving means 93, and the slide member 91 provided on the movable member 86 is moved in the direction B orthogonal to the mold opening / closing direction, so that the slide member 91 in the fixed mold 31 has the axis of the valve pin 61. The valve pin 61 connected to the slide member 91 moves in parallel with the direction C. Further, the guide member 101 parallel to the valve pin 61 is fixed to the fixed die 31, and the slide member 91 is guided by the guide member 101 to move in parallel, so that the slide member 91 relative to the movable member 86.
The smooth movement in the direction B orthogonal to the mold opening / closing direction is performed, and the gate 42 can be stably opened / closed without applying an excessive force to the valve pin 61.

In this way, the linear movement of the valve pin 61 inclined with respect to the mold opening / closing direction A is moved by the moving means 85 in the mold opening / closing direction A, and the slide member 91 relative to the movable member 86. Since the movement is performed in the direction B orthogonal to the mold opening / closing direction, the processing of the movable member 86 and the slide member 91, which are the constituent members of the moving means 85, is mainly performed in the mold opening / closing direction and the direction orthogonal thereto.

After the resin in the product cavity 33 is cooled and solidified, the fixed mold 31 and the movable mold 32 are opened, and the resin in the product cavity 33, that is, the molded product 1 is taken out. After that, the mold is closed again and the above molding cycle is repeated. Throughout the entire molding cycle, the resin in the material passage 51 of the valve casing 44 is constantly heated by the heater 53, like the resin in the runner 39 of the manifold 38. It is kept in the molten state.

As described above, in this embodiment, in accordance with claim 1, a pair of fixed molds 31 and movable molds 32, which are opened and closed to form the product cavity 33 between them when the molds are closed,
The material passage 51 provided in the fixed die 31 is used as a product cavity.
And a valve device 43 for opening and closing a gate 42 communicating with 33. The valve device 43 opens and closes the gate 42 by linearly moving a valve pin 61 which is a valve body inclined with respect to the mold opening and closing direction A, A valve gate type mold device comprising a moving means 85 for moving the valve pin 61, wherein the moving means 85 is
A movable member 86 provided on the fixed die 31 so as to be movable in the mold opening / closing direction A with respect to the fixed die 31, and a slide member provided on the movable member 86 so as to be movable in a rightward direction B orthogonal to the die opening / closing direction. Since 91 and the connecting portion 92 for connecting the slide member 91 and the valve pin 61 are provided, the moving means 85 linearly moves the valve pin 61 inclined with respect to the mold opening / closing direction A to open / close the gate 42. Done. And the means of transportation
At 85, the movable member 86 is moved in the mold opening / closing direction A, and the slide member 91 is moved in the orthogonal direction B with respect to the movable member 86, whereby the slide member 91 is moved in the axial direction C of the valve pin 61, Valve pin connected to slide member 91
61 can be moved linearly.

Therefore, the valve pin 61 is in the mold opening / closing direction A.
The moving means 85 is inclined with respect to
Since the movable member 86 that moves to the mold and the slide member 91 that moves to the movable member 86 in the direction B orthogonal to the mold opening / closing direction are processed, the processing of these members 86 and 91 is performed in the mold opening / closing direction A and its orthogonal direction. The direction B is mainly used, and the mold having the valve pin 61 inclined with respect to the mold opening / closing direction A can be easily manufactured.

As described above, in this embodiment, according to the second aspect, the moving means 85 is provided on the fixed die 31 and the valve pin is provided.
A guide member 101 parallel to the guide member 61, a slide member 91 having an engaging hole 104 as an engaging portion that engages with the guide member 101 and movable along the guide member 101, and the slide member 91 is opened and closed by a mold. And a movable member 86 that has a slide guide groove 90 that guides in a direction B orthogonal to the direction and is movable in the mold opening and closing direction A with respect to the fixed mold 31, and a slide member.
The movable member 86 is moved in the mold opening / closing direction A because the connecting portion 92 for connecting the valve pin 61 and the valve pin 61 is provided.
By moving the slide member 91 relative to 86 in the direction B orthogonal to the mold opening / closing direction, the slide member 91 moves in the axial direction C, and the valve pin 61 connected to the slide member 91 moves linearly. At this time, a guide member parallel to the valve pin 61
101 is provided in the fixed die 31, the engaging portion engages with the guide member 101, and the slide member 91 moves in parallel in an oblique direction.
The movement of the slide member 91 with respect to the movable member 86 in the direction B orthogonal to the mold opening / closing direction is smoothly performed, whereby the movement operation of the valve pin 61 is stabilized.

As described above, according to the third embodiment, in the valve gate mold apparatus according to the second aspect, the slide member 91 is provided with the engagement hole 104 serving as the engagement portion. Since the slide cylinder 103, which is a member, is rotatably provided, the slide member 91 is guided in the length direction of the guide member 101 and in the movable member 86 in the direction B orthogonal to the mold opening / closing direction. Slide cylinder 1 to fit
By rotatably providing 03 on the slide member 91, the movement of the moving means 85 becomes stable without applying an unreasonable force to the slide member 91 and the guide member 101.

Further, as an effect of the embodiment, since the slide cylinder 103 is rotatable around the axis of the guide member 101, the slide cylinder 103 can be smoothly moved along the guide member 101. it can.

As described above, in this embodiment, according to claim 4, the fixed mold 31 and the movable mold 32, which are a pair of mold bodies that are opened and closed with each other, are closed to form the fixed mold 31 and the movable mold 32. Material passage that forms the cavity 33 and is provided in the fixed die 31
51 is filled with the molding material into the product cavity 33 through the gate 42 opened to the product cavity 33, and the gate 42 is a valve body of the valve device 43 except when the molding material is filled into the product cavity 33. And a valve pin 61 is provided so as to be inclined in the mold opening / closing direction A, and the valve pin 61 is linearly moved to be removably fitted into the gate 42 to open / close the gate 42.
The fixed member 31 provided with the valve device 43 is provided with the movable member 86 so as to be movable in the mold opening / closing direction A, and the movable member 86 is provided with the slide member 91 so as to be movable in the direction B orthogonal to the mold opening / closing direction. By moving the movable member 86 in the mold opening / closing direction A, the slide member 91 is moved in the direction B orthogonal to the mold opening / closing direction,
Since the valve pin 61 is moved by the movement of the slide member 91, the movement of the movable member 86 with respect to the fixed die 31 in the mold opening / closing direction A moves the slide member 91 in the direction B orthogonal to the mold opening / closing direction. The valve pin 61 is moved by the movement of, and the gate 42 can be opened and closed by the valve pin 61. In this way, the movable member 86 moves in the mold opening / closing direction A,
In this movable member 86, since the slide member 91 moves in the direction B orthogonal to the mold opening / closing direction, the machining of these members can be performed mainly in the mold opening / closing direction A and the orthogonal direction B thereof.

As described above, in this embodiment, the fixed mold 31 is used in the molding method of claim 4 corresponding to claim 5.
Since the guide member 101 parallel to the valve pin 61 is provided on the slide member 91 and the slide member 91 is moved along the guide member 101,
Since the slide member 91 moves obliquely in parallel along the guide member 101, the slide member 91 moves smoothly with respect to the movable member 86 in the direction B orthogonal to the mold opening / closing direction, thereby moving the valve pin 61. It will be stable.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, as the drive means 93, various drive means can be used as long as they are means for moving the movable member in the mold opening / closing direction with respect to the fixed mold.

[0054]

According to the valve gate mold apparatus of the first aspect of the present invention, the valve body moving means includes a movable member provided on the mold body and movable with respect to the mold body in a mold opening / closing direction. Since the movable member is provided with a slide member that is movable in a direction orthogonal to the mold opening and closing direction and a connecting portion that connects the slide member and the valve body, the slide member is movable relative to the movable member in the mold opening and closing direction. By moving in a direction orthogonal to the slide member, the slide member moves in the inclination direction of the valve body, and the valve body connected to the slide member can be moved linearly. Also, since it is sufficient to mainly deal with the direction orthogonal to the mold, it becomes easy to manufacture the mold provided with the valve body that is inclined in the mold opening / closing direction.

According to a second aspect of the present invention, the moving means of the valve body has a guide member provided on the mold body and parallel to the valve body, and an engaging portion that engages with the guide member. A slide member that is movable along the guide member, a guide portion that guides the slide member in a direction orthogonal to the mold opening / closing direction, and a movable member that is movable with respect to the mold body in the mold opening / closing direction; Since the slide member is provided with the connecting portion connecting the member and the valve body, the engaging portion engages with the guide member and the slide member moves in parallel in the oblique direction. The movement in the direction orthogonal to is smoothly performed, and the movement of the valve body is stabilized.

According to a third aspect of the present invention, in the valve gate mold apparatus according to the second aspect of the present invention, the slide member is rotatably provided with an engaging member having the engaging portion. The operation is stable without applying excessive force to the slide member and the guide member.

According to a fourth aspect of the present invention, there is provided a molding method using a valve gate type mold device, wherein a movable member is provided on a mold body provided with the valve device so as to be movable in a mold opening / closing direction, and a slide member is molded on the movable member. Provided to be movable in a direction orthogonal to the opening / closing direction, the slide member is moved in a direction orthogonal to the mold opening / closing direction by moving the movable member in the mold opening / closing direction relative to the mold body, and the valve body is moved by moving the slide member. Since the movable member moves in the mold opening / closing direction, and the slide member moves in the movable member in a direction orthogonal to the mold opening / closing direction, the processing of these members is mainly performed in the mold opening / closing direction and the orthogonal direction. Therefore, the manufacturing of the mold provided with the valve body inclined in the mold opening / closing direction is facilitated.

According to a fifth aspect of the present invention, in the molding method using the valve gate mold apparatus of the fifth aspect, a guide member parallel to the valve body is provided on the mold body, and the guide member is provided along the guide member. The slide member is moved as a result, and the movement of the valve body is stabilized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a valve gate mold apparatus of the present invention.

FIG. 2 is a sectional view of the movable member of the above.

FIG. 3 is a perspective view of the guide member and the slide cylinder, and the guide member is partially sectioned.

FIG. 4 is an enlarged cross-sectional view near the gate of the same.

FIG. 5 is a cross-sectional view of a molded product.

FIG. 6 is a sectional view showing an example of a conventional valve gate mold apparatus.

FIG. 7 is an enlarged cross-sectional view of the vicinity of the gate of a valve gate type mold device in which the valve body is inclined in the mold opening / closing direction.

[Explanation of symbols]

31 Fixed type 32 Movable type 33 Product Cavity 39 Runner (material passage) 42 gates 43 Valve device 51 Material passage 61 Valve pin (valve body) 85 Transportation 86 Movable member 91 Slide member 92 Connection 101 Guide member 103 Slide cylinder (engagement member) 104 Engagement hole (engagement hole) A type opening and closing direction (type body opening and closing direction) B orthogonal direction (direction orthogonal to mold opening / closing direction) C-axis direction (valve body tilt direction)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshihiro Horikawa             3-1-1 Koganecho, Niigata City, Niigata Prefecture Mitsubishi             Niigata Works, Material Co., Ltd. F-term (reference) 4F202 AG23 AG26 CA11 CK03 CK06                       CK07 CK52

Claims (5)

[Claims] 1. A pair of molds which are opened and closed to form a product cavity between the molds when the molds are closed, and a valve device which opens and closes a gate for communicating a material passage provided in the mold with the product cavity. The valve device is a valve gate type mold device including a valve body moving means for opening and closing the gate by linearly moving a valve body that is inclined with respect to a mold opening and closing direction. The moving means includes a movable member provided on the mold body and movable with respect to the mold body in a mold opening / closing direction, and a slide member provided on the movable member so as to be movable in a direction orthogonal to the mold opening / closing direction. A valve gate type mold device comprising a slide member and a connecting portion for connecting the valve body. 2. A pair of molds which are opened and closed to form a product cavity between the molds when the molds are closed, and a valve device which opens and closes a gate for communicating a material passage provided in the molds with the product cavity. The valve device is a valve gate type mold device including a valve body moving means for opening and closing the gate by linearly moving a valve body that is inclined with respect to a mold opening and closing direction. The moving means includes a guide member that is provided on the mold body and is parallel to the valve body, a slide member that has an engaging portion that engages with the guide member, and is movable along the guide member, and the slide member. A movable member that has a guide portion that guides in a direction orthogonal to the mold opening / closing direction, is provided so as to be movable in the mold opening / closing direction with respect to the mold body, and a connecting portion that connects the slide member and the valve body. A valve gate type mold device comprising: 3. The valve gate mold apparatus according to claim 2, wherein an engaging member having the engaging portion is rotatably provided on the slide member. 4. A pair of molds that are opened and closed with each other is closed to form a product cavity between the molds, and a material passage provided in the molds is used to form a product cavity through a gate opened to the product cavity. When the molding material is filled in the product cavity, the gate is closed by the valve body of the valve device except when the molding material is filled in the product cavity, and the valve body is provided inclined in the mold opening / closing direction. Is a molding method in which the gate is removably fitted into the gate to open and close the gate so that the gate is opened and closed, and a movable member is provided in the mold provided with the valve device so as to be movable in the mold opening and closing direction. , A slide member is provided on the movable member so as to be movable in a direction orthogonal to the mold opening / closing direction, and the slide member is orthogonal to the mold opening / closing direction by moving the movable member with respect to the mold body in the mold opening / closing direction. Direction, and the valve body is moved by the movement of the slide member. A molding method using a valve gate type mold device. 5. The valve gate mold apparatus according to claim 4, wherein the mold body is provided with a guide member parallel to the valve body, and the slide member is moved along the guide member. The molding method used.