JPH068287A - Mold assembly - Google Patents

Abstract

PURPOSE:To improve a wear resistance of a slide contact surface of a slide core with a movable mold. CONSTITUTION:A guide rail 38 is secured to a slide core 23 through a connecting member 37. A pair of right and left slide contact members 41 coming into slide contact with the slide core 23 and a pair of right and left guide members 40 guiding the guide rail 38 are secured to a movable mold 22. A recessed guide part 43 fitted to the guide rail 38 is formed between the guide members 40. The slide contact members 41 coming into slide contact with the slide core 23 are made of a flat plate-form hardened steel. In this manner, since the slide core 23 comes into contact with the slide contact members 41 made of a flat-form hardened steel, the slide contact surface thereof is prevented from wearing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold device having a slide core, and more particularly to a slide guide groove structure for a slide core.

[0002]

2. Description of the Related Art Generally, when molding a molded product having an undercut portion, a slide core that slides by an angular pin is used, and a conventional mold device having such a slide core is shown in FIGS. It will be explained based on. In the figure, 1 is a fixed mold, 2 is a movable mold, 3 is both molds 1, 2.
With the slide core built in between, both molds 1 and 2 relatively move in the vertical direction in the drawing to open and close, and the slide core 3 can slide in a direction orthogonal to the opening and closing direction of the molds 1 and 2. It is provided in. Then, when the mold is clamped, the cavity 4 of the molded product a is formed by the respective molds 1 and 2 and the slide core 3. An angular pin 5 that is inclined in a direction away from the cavity 4 toward the movable mold 2 is fixed to the fixed-side mold 1, while an inclination that allows the angular pin 5 to be inserted into the slide core 3. A hole 6 is provided, and by engaging the angular pin 5 and the inclined hole 6, the fixed core mold 1 and the movable mold 2 are connected to each other to open and close the slide core 3 to the movable mold 3. Slide along. In addition, the movable mold 2
A pair of left and right guide rails 7 that slide and guide the slide core 3 are fixed to the guide rails 7. As shown in FIG. 6, the guide rails 7 have an inverted L shape in which a flange portion 8 projects inside the upper surface. The guide rails 7 thus formed are opposed to each other and fixed to the concave grooves 9 provided in the movable mold 2 with bolts 10 to form guide concave portions 11 between the guide rails 7.
On the other hand, the slide core 3 has a flange portion 12 projecting laterally at the lower end thereof, and the flange portion 12 is fitted into a guide recess 11 formed between the guide rails 7 to form a flange portion of the slide core 3. I am guiding 12 in a state that it does not come off.

At the time of molding, as shown in FIG. 5, first, the fixed mold 1, the movable mold 2, and the slide core 3 are clamped, and molten resin is poured into the cavity 4 in this state. Then, after the resin filled in the cavity 4 is solidified, the fixed mold 1 and the movable mold 2 are opened. Along with this mold opening, the molded product a in the cavity 4 and the fixed side mold 1 are separated from each other, and the slide core is fixed by the angular pin 5 fixed to the fixed side mold 1 as shown by the chain line in FIG. 3 moves along the guide rail 7, and the molded product a and the slide core 3 are separated from each other. Then, the molded product a is projected by a protruding member (not shown) provided on the movable mold 2 side, and the molded product a and the movable mold 2 are separated from each other. When the fixed mold 1 and the movable mold 2 are clamped again after the molded product a is taken out, the slide core 3 moves by the angular pin 5 and returns to the initial position at the time of molding.

[0004]

In the above-mentioned conventional mold device, the slide core 3 is formed by the angular pin 5.
The flange portion 12 slides along the guide rail 7 as the molds 1 and 2 are opened and closed. At that time, the bottom wall surface 9A of the concave groove 9 that makes sliding contact with the slide core 3 and the flange portion 12 of the slide core 3 Each time the slide core 3 slides, the guide rail 7 that slides in contact with the slide rail 3 is repeatedly rubbed against each other, and as a result, the slide contact surface wears and an unnecessary gap is generated between the slide core 3 and the guide rail 7. There is concern that the slide core 3 cannot be smoothly guided. Therefore, in order to prevent such an adverse effect due to wear, it is desired to quench the sliding contact surface with the slide core 3 to improve wear resistance. However, in order to quench the concave groove 9 of the movable mold 2 and the flange portion 12 of the slide core 3, the concave groove 9 and the flange portion 12 cannot be locally quenched, so that the slide core 3 and the slide core 3 are movable. The side mold 2 will be made of hardened steel.
However, since hardened steel has a high hardness, it is difficult to process such hardened steel in terms of manufacturing precision and manufacturing processing. Therefore, in the conventional mold device,
Guide rail 7 that slides in contact with flange 12 of slide core 3
I was only quenching. Therefore, it is not possible to prevent wear of the recessed groove 9 that is in direct sliding contact with the slide core 3, and it is not possible to smoothly guide the slide core 3 for a long period of time. Especially, when the slide core 3 is slid by the angular pin 5. However, since the angular pin 5 is inclined, a force is applied to the slide core 3 in the downward direction in the drawing during mold clamping, and there is a problem that the concave groove 9 that is in sliding contact with the slide core 3 is likely to wear quickly. Also, when manufacturing the guide rail 7,
Inverted L with the guide rail 7 projecting the flange portion 8 inward
Since it is formed in a character shape, as described above, it is necessary to process the flange portion 8 portion, and there is a problem that the manufacturing workability is also poor.

The present invention solves the above problems and provides a die apparatus which can improve the wear resistance of the sliding contact surface between the slide core and the movable side die and is excellent in manufacturing workability. The purpose is to

[0006]

In order to achieve the above-mentioned object, a mold apparatus of the present invention comprises a fixed side mold and a movable side mold which can be opened and closed, and a direction perpendicular to the opening and closing directions of the two molds. A slide core provided so as to be slidable, a cavity is defined by the fixed side mold, the movable side mold and the slide core, and the cavity is defined by the fixed side mold and the movable side mold so that the cavity is linked to the slide. In a mold device that slides a core along a movable mold, a guide rail wider than the connecting member is fixed to the slide core via a connecting member, and the movable core mold is slidable with the slide core. The pair of left and right sliding contact members made of hardened steel in contact with each other are fixed, and a pair of left and right guide members are provided below each of the sliding contact members, along the moving direction of the slide core between the guide members. Providing a guide recess that fits with the guide rail It is intended.

Further, in order to achieve the above object, in the mold apparatus of the present invention, an angular pin inclined in a direction away from the cavity is fixed to the fixed side mold toward the movable side mold, and the fixed core is fixed to the slide core. An inclined hole through which the angular pin is inserted is provided, and by engaging the angular pin and the inclined hole, the fixed core mold and the movable mold are opened and closed, and the slide core is moved along the movable mold. It is provided so as to slide together. Further, in order to achieve the above-mentioned object, the mold device of the present invention is integrally provided with a guide step portion on the movable side mold, and fixing the sliding contact member on the upper surface of the guide step portion, Guide recesses are provided between the guide steps along the moving direction of the slide core so as to fit with the guide rails.

[0008]

In the mold apparatus of the present invention, at the time of molding, the cavity defined by the fixed side mold, the movable side mold and the slide core is filled with resin, and the filled resin is solidified and then fixed. The side mold and the movable side mold are opened, but with this mold opening, the angular pin of the fixed side mold is pulled out from the inclined hole of the slide core, and this slide core is moved to the movable side mold. The slide rail guide rail of the slide core slides along the guide recess formed between the guide members while sliding on the slide contact member made of hardened steel fixed to the molded product.
In this case, the sliding contact member made of hardened steel that is in sliding contact with the slide core improves the wear resistance of the sliding contact surface with the slide core and prevents the sliding contact surface from being worn.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the mold apparatus of the present invention will be described below with reference to FIGS.

In the figure, 20 is a resin molded product, and this molded product 20
Has, for example, a box shape having an open lower surface in the drawing, and has a hole 20A serving as an undercut portion in the side surface portion. Also, 21
Is a fixed side mold, 22 is a movable side mold, and a slide core having a protrusion 20B corresponding to the hole 20A between the molds 21 and 22.
23 is incorporated so as to be movable in the horizontal direction in the figure. Then, the fixed side mold 21 and the movable side mold 22 relatively move in the vertical direction in the drawing to open and close, and the slide core 23 is linked to the opening and closing of the respective molds 21 and 22 and is orthogonal to the opening and closing direction. By sliding on the movable side mold 22, and when the molds 21, 22 and the slide core 23 are clamped, a cavity 24 having the shape of the molded product 20 is defined. The fixed mold 21 includes a cavity member 25 forming a cavity 24, a receiving plate 26 fixed to the upper side of the cavity member 25 in the drawing, and a spacer block (not shown) above the receiving plate 26 in the upper side of the drawing. A fixed-side mounting plate that is fixed and attached to the fixed-side platen of the injection molding machine;
The fixed side mounting plate and the manifold provided between the receiving plates 26 are included. On the other hand, the movable mold
Reference numeral 22 denotes a core member 27 forming a cavity 24, a receiving plate 28 fixed below the core member 27 in the drawing, and a receiving plate 28.
And a movable side mounting plate 30 fixed to a movable side platen of the injection molding machine fixed via a spacer block 29 on the lower side of FIG. 28, and the receiving plate 28, the spacer block 29, and the movable side mounting plate 30. The protruding plates 31 and 32, which are supported so as to be movable up and down in the drawing, are arranged between them.
The core member 27 is slidably passed through 31 and 32 to form a molded product 20.
The lower end portion of the protrusion pin 33 that protrudes toward the fixed-side mold 21 is fixed. Further, a groove 34 is provided on the upper surface of the core member 27 along the moving direction of the slide core 23,
The slide core 23 is assembled in the groove 34 so as to be movable in the horizontal direction in the drawing, and the fixed mold 21 is provided with an angular pin 35 that is inclined downward in the direction away from the cavity 24. On the other hand, the slide core 23 is fixed, and on the other hand, the inclined hole 36 through which the angular pin 35 is slidably inserted.
By the engagement of the angular pin 35 and the inclined hole 36, the fixed side mold 21 and the movable side mold 22 are linked to mold clamping and mold opening, and the slide core 23 is caused to follow the concave groove 34. Slide it. In this case, a guide rail 38 wider than the connecting member 37 is fixed to the lower surface of the slide core 23 by a bolt 39 via the connecting member 37, while the guide rail 38 is fixed by the bolt 39. A pair of left and right guide members 40 and a pair of left and right sliding contact members 41 that slidably contact the lower surface of the slide core 23 are sequentially assembled from the lower side in the drawing in the recessed groove 34 serving as a sliding surface for the cores by bolts 39A. Fixed to member 27,
Further, by setting the interval between the sliding contact members 41 to the width of the connecting member 37 and the interval between the guide members 40 to the width of the guide rail 38, the slide core 23 between the sliding contact members 41 is set. The insertion portion 42 of the connecting portion 37 is formed along the movement direction of the connection portion 37, and the guide recessed portion 43 that communicates with the insertion portion 42 and that fits with the guide rail 38 is formed between the guide members 40. And the guide recess
The guide rail 38 of the slide core 23 is inserted into the slide core 23 from the side, and the guide rail 38 is slid and guided so as not to come off. The connecting member 37, the guide rail 38,
The guide member 40 and the sliding contact member 41 are each made of hardened steel in the shape of a rectangular plate. Reference numeral 44 in the figure denotes an ejection rod of the injection molding machine, and the ejection rod 44 penetrates through a through hole 45 formed in the movable mounting plate 30 and ejects the ejection plates 31 and 32 upward in the drawing. .

Next, the operation of the above configuration will be described. At the time of molding, as shown in FIG. 1, first, the fixed mold 21 and the movable mold 22 are clamped. In this state, a cavity 24 is provided between the cavity member 25 of the fixed mold 21 and the core member 27 of the movable mold 22 and the slide core 23.
Is formed. Further, the ejecting plates 31 and 32 are held in the illustrated lowered position by a return pin or the like (not shown) provided on the fixed mold 21 side, and the upper end surface of the ejecting pin 33 is positioned so as to form a part of the cavity surface. . In such a mold clamped state, the molten resin is poured into the cavity 24. Then, after the resin filled in the cavity 24 is solidified, as shown in FIG. 2, the fixed side mold 21 and the movable side mold 22 are opened. With this mold opening, first, the cavity member 25 of the fixed-side mold 21 is separated from the molded product 20, and together with this, the angular pin 35 of the fixed-side mold 21 is pulled out from the inclined hole 36 of the slide core 23. The slide core 23 is a guide rail for the slide core 23 while slidingly contacting the sliding contact member 41.
38 slides along the guide recess 43 formed between the guide members 40 and separates from the molded product 20, and the protrusion 20B comes out of the hole 20A. Then, after the slide core 23 is sufficiently separated from the molded product 20, that is, to a position where it does not interfere with the protrusion of the molded product 20, the ejection plates 31 and 32 start to be ejected upward in the drawing, that is, toward the fixed-side mold 21. Then, the molded product 20 is projected from the movable-side mold 22 toward the fixed-side mold 21 and separated from the movable-side mold 22. Then, after taking out the molded product 20 which has been released, the mold is clamped again for the next molding. At the time of this mold clamping, as the ejecting rod 44 of the injection molding machine descends as illustrated, the ejecting plates 31 and 32 together with the ejecting rod 44 descend as illustrated relative to the movable mold 22 and are illustrated in FIG. Thus, the ejection plates 31 and 32 and the ejection pin 33 return to the lowermost position of the movable die 22, that is, the initial position at the time of molding. The angular pins 35 are inserted into the slanted holes 36 of the slide core 23 from the time when the ejection plates 31 and 32 and the ejection pins 33 have returned to the initial positions at the time of molding.
The guide rail 38 of the slide core 23 begins to move along the guide recess 43 formed between the guide members 40 while slidingly contacting on the slide contact member 41 in the concave groove 34 in the direction opposite to the mold opening. And
When the mold clamping is completed, as shown in FIG. 1, a cavity 24 is formed again between the cavity member 25 of the fixed mold 21 and the core member 27 of the movable mold 22 and the slide core 23. To be done.

As described above, according to the structure of the above embodiment, the connecting member 37 fixed to the slide core 23, the guide rail 38, the connecting member 37, the guide member 40 slidingly contacting the guide rail 38, and the sliding contact member. Since each 41 is formed of hardened steel, the wear resistance of the sliding contact surface can be improved,
Wear on the sliding surface can be suppressed. In particular, when the tilted angular pin 35 is used as the slide driving means of the slide core 23 as in the present embodiment, the slide core 23 is pushed by the angular pin 35 during mold clamping and the lower side in the figure, that is, the sliding contact member. Although a force to press 41 is applied, since the sliding contact member 41 is hardened steel, there is no risk of malfunction of the slide core 23 due to galling or the like. Moreover, the slide core 23
The connecting member 37, the guide rail 38, and the guide member 40 and the sliding contact member 41, which are attached to the movable side mold 22, are manufactured separately from the slide core 23 and the movable side mold 22, respectively, and are connected to each other. The member 37, the guide rail 38, the guide member 40, and the sliding contact member 41 are each formed into a rectangular flat plate shape, so that a rectangular flat plate corresponding to the shapes of the connecting member 37, the guide rail 38, the guide member 40, and the sliding contact member 41 in advance. Since it is necessary to assemble this into the slide core 23 and the movable die 22 using hardened steel, it is not necessary to process each of these parts, and the manufacturing processability is excellent. is there.

FIG. 4 shows a second embodiment of the present invention. The same parts as those of the first embodiment will be designated by the same reference numerals and the detailed description thereof will be omitted.

In this embodiment, similarly to the first embodiment, the guide rail 38 wider than the connecting member 37 is fixed to the slide core 23 via the connecting member 37 by bolts 39 so that the guide rail 38 has an inverted T shape. On the other hand, in the first embodiment, the guide member 40 provided as a separate member in the groove 34 of the core member 27 is omitted, and the guide member 50 is integrally formed on the core member 27. This guide step
A pair of left and right sliding contact members 41 are fixed to the upper surface of 50 with bolts 39A. Then, by the guide step 50, the guide rail
A guide recess 51 is formed in which 38 is fitted in a state in which it does not come off. As a result, the slide core 23 that slides in association with the opening and closing of the fixed-side mold 21 and the movable-side mold 22 moves on the sliding contact member 41, and the guide rail 38 of the slide core 23 has the guide step portion. The guide recesses 51 between the 50 allow smooth guidance. The connecting member 37 provided on the slide core 23, the guide rail 38, and the sliding contact member 41 fixed to the guide step 50 of the core member 27 are the first
Similar to the embodiment, it is formed of hardened steel having a rectangular flat plate shape. According to such a configuration, the sliding of the slide core 23 prevents abrasion of the sliding surface with the slide core 23, which is easily worn. In this embodiment, since the guide stepped portion 50 is integrally formed with the core member 27, the guide member 40, which is a separate body, is fixed to the core member 27, although the manufacturing processability thereof is somewhat difficult. Assembling work can be simplified by reducing the number of parts as compared with the first embodiment.

The present invention is not limited to the above embodiments, but various modifications can be made. For example, the structure of the protruding pin that protrudes the molded product may be appropriately set. Further, although the slide core driven by the angular pin is shown, the slide core may be slid by the cylinder device, and the slide core may be slid. The dynamic drive means may be set appropriately. In addition, although the connecting member and the guide rail of separate bodies were fixed to the slide core,
The slide core and the connecting member may be integrally formed, or the connecting member and the guide rail may be integrally formed and fixed to the slide core.

[0016]

According to the invention described in claim 1, a fixed side mold and a movable side mold which can be opened and closed, and a slide core provided slidably in a direction orthogonal to the opening and closing direction of the both molds. And forming a cavity with the fixed side mold, the movable side mold and the slide core, and linking the opening and closing of the fixed side mold and the movable side mold to move the slide core into the movable side mold. In a die device that slides along a guide rail, a guide rail that is wider than the connecting member is fixed to the slide core through a connecting member, and the movable die is made of a hardened steel plate that is in sliding contact with the slide core. A pair of right and left sliding contact members is fixed, and a pair of left and right guide members are provided below each of the sliding contact members, and a guide recess is formed between the respective guide members and fitted with a guide rail along the moving direction of the slide core. It is easy to manufacture by providing Together, it is possible to provide a mold apparatus which can improve the wear resistance of the sliding surface of the slide core.

According to a second aspect of the present invention, an angular pin inclined in a direction away from the cavity is fixed to the fixed side mold toward the movable side mold, and the angular contact is fixed to the slide core. An inclined hole through which the pin is inserted is provided, and by engaging the angular pin with the inclined hole, the fixed core mold and the movable mold are linked to open and close, and the slide core is slid along the movable mold. Since the slide core is provided so as to move, when the slide core slides by the angular pin, even if the slide core presses the sliding contact member, there is no scoring and the slide core can operate well.

According to the third aspect of the invention, a guide step is integrally provided on the movable die, and the sliding contact member is fixed to the upper surface of the guide step. By providing guide recesses that fit with the guide rails along the moving direction of the slide core between the guide steps, the assembling work is easy and the wear resistance of the surface slidingly contacting the slide core is improved. It is possible to provide a mold device that can do this.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first embodiment of a mold device of the present invention in a mold clamped state.

FIG. 2 is a sectional view of the same mold in an opened state.

3 is a sectional view of the same, corresponding to a section taken along line BB of FIG.

FIG. 4 is a sectional view of a second embodiment of the mold apparatus of the present invention in a mold clamped state.

FIG. 5 is a cross-sectional view of an example of a conventional mold device in a mold clamped state.

6 is a sectional view of the same as above, and corresponds to a section taken along line AA of FIG.

[Explanation of symbols]

 21 Fixed side mold 22 Movable side mold 23 Slide core 24 Cavity 35 Angular pin 36 Inclined hole 37 Connecting member 38 Guide rail 40 Guide member 41 Sliding contact member 43 Guide recess 50 Guide step 51 Guide recess

Claims (3)

[Claims] 1. A fixed side mold and a movable side mold which can be opened and closed,
A slide core provided so as to be slidable in a direction orthogonal to the opening / closing direction of the two molds, and a cavity is defined by the fixed mold, the movable mold and the slide core, and the fixed mold. And a mold device that slides the slide core along the movable mold by being linked to the opening and closing of the movable mold, and a guide rail wider than the connecting member is fixed to the slide core via the connecting member. Then, a pair of left and right sliding contact members made of hardened steel in a flat plate shape which are in sliding contact with the slide core are fixed to the movable die, and a pair of left and right guide members are provided below the sliding contact members. A mold apparatus comprising guide recesses provided between the guide members along the moving direction of the slide core so as to be fitted with the guide rails. 2. An angular pin inclined in a direction away from the cavity is fixed to the fixed side mold toward the movable side mold, and an inclined hole through which the angular pin is inserted is provided in the slide core. It is characterized in that the slide core is provided so as to slide along the movable mold by being linked with the opening and closing of the fixed mold and the movable mold by engagement of the regular pin and the inclined hole. The mold apparatus according to claim 1. 3. A guide step is integrally provided on the movable die, the slide contact member is fixed to the upper surface of the guide step, and the slide core is moved between the guide steps. The mold apparatus according to claim 1, further comprising a guide recess that fits with the guide rail along the direction.