JPH0243694Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a taper lock device for precisely aligning templates on a mold base and performing highly accurate molding, and in particular, the invention relates to a taper lock device for precisely aligning templates of a mold base and performing highly accurate molding. It was made easy.

[Prior Art] FIG. 3 is a sectional view of a pinpoint gate type mold base, showing the protrusion of the molded product 1 by the ejector pin 2 at the final stage of the mold opening process.

The fixed side mold plate 5 and the movable side mold plate 6, on which the cavity 3 and the core 4 are formed, are configured so that the molds are matched via a guide pin 7 and a bush 8. If strict type matching is required,
It is possible to reduce the clearance between the guide pin 7 and the bushing 8, but since the templates 5 and 6 are prone to temperature differences and misalignment of the guide pin 7 occurs due to thermal distortion, it is not recommended to reduce the clearance too much. begins to occur. Therefore, the clearance is usually set to about 0.01 mm to 0.02 mm.

However, the guide pin 7 is deflected due to the weight of the templates 5 and 6, and errors in machining and assembly of the guide pin 7 and the bushing 8 are also added, so ultimately the guide pin 7 and the bushing 8 are The upper limit of accuracy for mold matching based on combination alone is approximately 0.05 mm.

Therefore, when more precise mold matching accuracy is required, as is required in recent engineering plastic precision molding, conventional methods shown in Figs. 4 and 5 have been used.
A taper lock device as shown in the figure was sometimes used in conjunction with the mechanism consisting of the guide pin 7 and bush 8.

This taper lock device can be used, for example, on the mold dividing surface of the conventionally used mold base as shown in Fig. 3.
Two or more locations are provided on the PL to enable mold matching with zero clearance. As shown in FIG. 4, this taper lock device has a pair of cylindrical storage sections at opposing positions on the mold dividing surface PL, which is the opposing surface between the fixed side template 5 and the movable side template 6 of the mold base. 9 and 10 are formed and opened, and the storage portions 9 and 1 are opened.
A pair of taper lock members constituted by a cylindrical male member 11 and a female member 12 are fitted into the
These are fixed to templates 5 and 6 from the rear side using bolts. Said male member 1
Reference numeral 1 denotes a cylindrical base 11a that is fitted and buried in the storage portion 9, and a truncated conical protrusion 11b that is provided on the outer end surface 11d of the base 11a and protrudes outward from the mold dividing surface PL. The side surface of the convex portion 11b is a tapered surface 11c whose outer diameter becomes smaller toward the outside. Further, the female member 1
2, a recess 12b is formed on the outer end surface 12d of a cylindrical base 12a that is fitted and buried in the storage portion 10, and the inner diameter of the recess 12b increases toward the outside. The tapered surface 12c has a shape that matches the tapered surface 11c of the convex portion 11b.

As shown in FIG. 4, when the mold bases are matched, the male member 11 and the female member 12 are in contact with each other at their respective tapered surfaces 11c and 12c, and the end surface 11e of the convex portion 11b and the concave portion 12b are in contact with each other.
A gap is formed between the bottom surface 12e of the male member 11 and the outer end surface 11d of the male member 11 and the outer end surface 12d of the female member 12.

Next, an example of a method for adjusting the conventional taper lock device shown in FIG. 4 will be described with reference to FIGS. 5 and 6.

First, the combined male member 11 and female member 1
If the end surface 11e of the convex portion 11b and the bottom surface 12e of the concave portion 12b are in contact with each other as shown in FIG. 5a, the end surface 11e of the convex portion 11b is polished and A gap S is provided as shown in FIG.
Then, confirm that the tapered surfaces 11c and 12c of the male member 11 and the female member 12 are securely in contact with each other.

Next, as shown in FIG.
The end face 12f on the side of the storage section 10 is polished so that the total height OH of the taper lock member matches the buried depth of the storage sections 9 and 10 measured in advance. At this time, when two or more taper lock members are buried in the templates 5 and 6, the depth of embedding of each storage part 9 and 10 is measured, and the total height OH of the taper lock member is determined by the embedding depth of the storage parts 9 and 10. Adjustment is required to suit.

Further, as shown in FIG. 7, a concave portion 13 that opens outward from the mold plates 5, 6 is provided at the bottom of the storage portions 9, 10, and disk spacers 14, 14 of an appropriate thickness are provided in the concave portion 13. When fixing and embedding the taper lock member, use the disk spacers 14, 14.
It is only necessary to match the total height of the taper lock member with the combined thickness of templates 5 and 6.
Since the thickness and parallelism errors are negligible, all you need to do is measure the thickness of the templates 5 and 6 at one point, align the total heights of the multiple taper lock members, and grind them together. Compared to the case of a bottomed hole as shown in Fig. 4, the hole is easier to machine and the taper lock is easier to adjust.

[Problems to be Solved by the Invention] However, even with the conventional taper lock device shown in FIG. 7 described above, there are many steps in the adjustment work, and highly accurate polishing is still required. That is, if the part is cut too much, it will not be possible to make corrections, so the member will have to be discarded, and if the tapered surface is in uneven contact, that part will wear out and play will occur, making it difficult to make corrections.

As described above, the conventional mold-based taper lock device has the problem of requiring skilled measuring and polishing techniques for adjustment work, and requires a lot of time for adjustment.Therefore, this taper lock device has not been used much in the past. I wasn't there.

[Purpose of the invention] This invention was made to solve the above-mentioned problems, and its purpose is to provide a mold-based taper lock device that is easy to adjust.

[Means for Solving the Problems] Therefore, in order to achieve the above-mentioned object, this invention has the following configuration as a gist.

That is, it is recommended that a pair of storage parts be formed at two or more positions on opposing mold division surfaces of a fixed side mold plate and a movable side mold plate that constitute a mold division surface, and that a taper lock member is formed in the storage parts. In a mold base taper lock device that stores and fixes a member and a female member respectively and regulates the positions of the fixed mold plate and the movable mold plate during mold clamping, the taper lock device is provided at the bottom of at least one of the storage parts, A stopper member whose protrusion amount into the storage part can be adjusted so as to come into contact with the bottom surface of the male member or female member in the storage part, and a male member in the storage part that is provided at the bottom of at least one of the storage parts. Alternatively, the present invention is characterized by comprising a bolt that is screwed onto the bottom surface of the female member to fix the male member or the female member in contact with the stopper member.

[Example] This invention will be explained below with reference to an example shown in FIGS. 1 and 2.

FIG. 1 is a sectional view of an embodiment of this invention, and FIG. 2 is a sectional view showing essential parts of a second embodiment.

As shown in Figure 1, mold base template A
and template B are matched at the mold dividing surface PL, and on the opposing surfaces of template A and template B,
Cylindrical storage portions 15 and 16 are each formed with an opening. A through hole 17 is provided in the center of the bottom of the storage section 15 of the template A, and the template A is inserted through the stepped part 17a.
The inner diameter is enlarged and communicated with the back side. A through hole 18 similar to that provided in the template A is formed in the bottom 16a of the storage portion 16 of the template B, and screw holes 19 and 20 are provided on both sides of the through hole 18.
It is formed with an opening on the back side.

In the housing portion 15 of the template A, a male member 21, which is one of the taper lock members, is removably provided. The male member 21 includes a cylindrical base 23 that is fitted and buried in the storage portion 15, and a truncated conical convex portion that is provided on the outer end surface 23a of the base 23 and protrudes outward from the mold dividing surface PL. 24, and the side surface of the convex portion 24 is a tapered surface 24a whose outer diameter becomes smaller toward the outside. A bolt hole 23b is provided in the center of the bottom surface of the base 23, and a bolt b inserted through the through hole 17 of the template A is screwed into the bolt hole 23b, and the male member 2
1 is fixed in the storage section 15.

Next, in the housing portion 16 of the template B, a female member 22, which is the other taper lock member, is detachably provided. The female member 22 is connected to an outer end surface 25a of a cylindrical base portion 25 that is fitted and buried within the storage portion 16.
It has a structure in which a recess 26 is provided in the recess 26.
The inner surface thereof is a tapered surface 26a whose inner diameter increases toward the outside. A through-bolt hole 25b is provided in the center of the base 25, and a bolt b inserted through the through-hole 18 of the template B is screwed into the through-bolt hole 25b, and the female member 22 is inserted into the storage portion 16. It is fixed. In addition, the screw holes 19 and 20
There are set screws 27 and 28 as stopper members.
are screwed in, and the tips of the set screws 27 and 28 protrude into the storage portion 16 and abut against the bottom surface 22a of the female member 22.

As shown in FIG. 1, when the mold bases are matched, the male member 21 and the female member 22 are brought into contact and locked only at the tapered surface 24a of the convex portion 24 and the tapered surface 26a of the concave portion 26. The other parts of both members 21 and 22 are configured to face each other with a gap in between.

Next, as shown in FIG. 2, an embodiment will be described in which the thickness of the template C is relatively large compared to the size of the taper lock member. In FIG. 2, only the configuration of one template C and the male member 121 as one taper lock member that is fitted and attached thereto is shown, and the configuration of the other template and female member that should be attached to these is omitted. It has been done.

There is a cylindrical storage part 1 on the mold dividing surface PL of the template C.
6 is formed as an opening, and the storage portion 116 is a large-diameter recessed fitting portion 113 formed as an opening on the back surface of the template C.
is communicated with.

A male member 121 having a structure similar to that shown in the first embodiment is fitted and buried in the storage portion 116, and a disk having an appropriate thickness is provided in the recessed fitting portion 113. A spacer 114 is fitted and locked onto the stepped portion 113a. An insertion hole 117 for inserting a bolt is provided in the center of the disk spacer 114.
Screw holes 119 and 120 are provided on both sides.

Bolt hole 12 provided in the male member 121
1a is the insertion hole 11 of the disk spacer 114.
The tip of the bolt b that protrudes into the storage portion 116 through 7 is screwed in to fix the male member 121 to the template C. Furthermore, set screws 127 and 128 as stopper members are screwed into the screw holes 119 and 120 of the disk spacer 114, and the tips of the set screws 127 and 128 are inserted into the member 121 that protrudes into the housing portion 116. bottom surface 1
21b.

Next, the adjustment procedure and operation of the taper lock device constructed as described above will be explained with reference to FIG.

First, the member 21 is fitted and buried in the storage section 15 of the template A. Then, from the back side of template A, through hole 1
7, and screw it into the bolt hole 23b of the male member 21 to fix the male member 21 to the template A.

Next, the female member 22 is fitted into the accommodating portion 16 of the template B, and the templates A and B are aligned with the set screws 27 and 28 loosened without bolting.

Next, when the set screws 27 and 28 are screwed in, the tips of the set screws 27 and 28 will be attached to the storage part 16.
Since the female member 22 protrudes inward and comes into contact with the bottom surface 22a of the female member 22 and presses the female member 22, the female member 22
is a member 21 that slides on the inner wall surface of the storage section 16.
be pushed in a direction.

At this time, the male member 21 and the female member 22 are
Since contact is engaged only at each tapered surface 24a, 26a, even if the respective centers are shifted, as the set screws 27, 28 are screwed in, the tapered surface 24a
a, 26a will undergo a corrective action.

When the mold dividing surfaces of templates A and B are completely closed and all the set screws 27 and 28 can no longer be screwed in, the adjustment of the taper lock device is completed, and in this state bolt b is tightened. The female member 22 is fixed to the template B by being inserted into the through hole 18 from the back side of the template B and screwed into the bolt hole 25b of the female member 22.

As explained above, in the first embodiment, the set screw is provided on the template on the female member side, and the set screw is provided on the template on the female member side.
In the embodiments described above, the set screws were provided on the template on the male member side, but in these examples, the set screws may be provided on the other template, or on both templates.

Further, the adjustment method and operation of the taper lock device according to the second embodiment are almost the same as those of the first embodiment, and even in this case, reliable adjustment can be easily performed by the action of the set screw, etc.

[Effect of the invention] As explained above, according to the device of this invention,
A stopper member whose protrusion amount into the storage part can be adjusted is provided at the bottom of the storage part, and a bolt is provided for fixing the male or female member in the storage part in contact with the stopper member. As described above, according to the present invention, the position of the male member or the female member can be determined by adjusting the amount of protrusion of the stopper member into the storage portion, and furthermore, the position of the male member or the female member can be determined by tightening the bolt. By bringing the members into contact with the stopper member, the male or female members can be reliably fixed in a predetermined position by the tightening force of the bolt. Therefore, the male member or the female member does not come loose during the molding operation, and precise mold matching can be achieved. And, no special machine is required to adjust the taper lock device.
It has the advantage that it can be easily and accurately adjusted without requiring time-consuming and skilled work such as polishing work, and it is also extremely easy to make corrections when the male member and female member become worn.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the first embodiment of this invention;
Fig. 2 is a partially omitted sectional view of a second embodiment of this invention, Fig. 3 is a side sectional view showing an example of a mold base to which this invention is applied, and Fig. 4 is a conventional taper lock. Cross-sectional view of the device, Figures 5 and 6
The figure is a partial sectional view showing an example of a conventional adjustment process for two sets of taper lock members, and FIG. 7 is a sectional view showing another configuration of the conventional taper lock device. 15, 16... Storage portion, 21... Male member, 22...
Female member, 24...Convex portion, 24a...Tapered surface, 26
... recessed portion, 26a... tapered surface, 27, 28... set screw as a stopper member.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of storage portions is formed at two or more positions on opposing mold separation surfaces of a fixed side mold plate and a movable side mold plate constituting a mold separation surface, and the storage portions are In a mold base taper lock device which stores and fixes a male member and a female member forming a taper lock member respectively and regulates the position of the fixed mold plate and the movable mold plate during mold clamping, at least one of the storage parts is a stopper member provided at the bottom and whose protrusion amount into the storage part can be adjusted so as to come into contact with the bottom surface of the male member or female member in the storage part, and a stopper member provided at the bottom of at least one of the storage parts, A taper lock of a mold base characterized by comprising a bolt that is screwed onto the bottom surface of the male member or female member in the storage portion to fix the male member or the female member in a state in contact with the stopper member. Device.