JPS6083816A - Plunger of transfer forming machine - Google Patents

Abstract

PURPOSE:To easily and promptly align the axis of the head of a plunger with that of the pot thereof by a method wherein the slide ring is pulled down so that the axis of the slide ring is aligned with that of the cylinder rod and the head is prepared so that it is fixed. CONSTITUTION:The spindle body 14 is fitted coaxially to the cylinder rod 10 of a transfer making machine and the frame body 16 is fitted coaxially to this spindle body 14. The head 26 is supported to this frame body 16 with a little play so that it can move radially. There is provided the slide ring 24 so that the head 26 can be fixed to the frame body 16 when the slide ring is pulled down axially. There is provided the stoppers 76, 78 for fixing the slide ring 24 in a state wherein it is pulled upward when the head 26 is moved and adjusted in the radial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressurizing plunger that can be inserted into a cylinder rod of a cylinder provided in a transfer molding machine. By fixing the heads to movable heads within the pot with their axes aligned with each other, the pot can be moved and fixed in an appropriate position relative to the head, and then the fixation of the head can be released to adjust the position of the head relative to the pot. Concerning a plunger for a transfer molding machine that can be finely adjusted.

In the transfub molding machine, if the axes of the mold and the plunger head attached to the cylinder rod of the cylinder do not match, the plunger head may not be suitable for the bot of the upper mold. The positioning of the mold is extremely important because the mold cannot be fitted in the circle 11- and the molding operation cannot be performed in the circle 11-. Conventionally, positioning of the mold is done by placing the lower mold on the Porski Brake 1.
・Draw a marking line on the top and match it, measure the distance from the end of the plate and roughly position it, and then hammer or etc. I used to make fine adjustments by tapping on it. Therefore, the work is extremely complicated and requires skill. However, in the past, there was little need to replace the mold once it had been positioned and fixed, so the above-mentioned drawbacks were overlooked without being considered a serious problem. In addition, it is difficult to achieve positioning accuracy with fine adjustments using a hammer, etc., and galling is likely to occur on the plunger head or the inner wall of the bot due to misalignment between the plunger head and the bot. The defects did not make the molding work itself impossible, so they were overlooked without being considered a serious problem. However, in recent years, automation has progressed in transfer molding, and it has become necessary to match the operations of other machines.
When a lead frame, etc. is supplied onto a mold by a robot, it is impossible to perform the molding work unless the above-mentioned positioning accuracy is achieved, and it is also necessary to frequently replace the mold. It's coming to life. In order to meet this need, both the upper and lower molds are positioned and fixed by bringing the lower mold into contact with an abutting member provided on the Polskoo plate via the liner, and the liner is removed before the molding operation. A possible positioning method is to create a gap between the lower mold and the abutting member. According to this positioning method, positioning can be performed easily and accurately, and even if the lower mold expands thermally during the molding operation, it will not be deformed because it does not come into contact with the abutment member, and the center of the mold will not be displaced. It will always be located on an extension of the axis of the plunger head. However, even though this positioning method achieves higher accuracy when compared to conventional methods, it is difficult to perfectly align the axes of the plunger and the bot, and this does not pose a problem to the molding work. However, it is unavoidable that a slight deviation occurs between the two axes. However, with conventional plungers, the entire plunger is integrated and the head cannot be moved in the radial direction with respect to the cylinder rod, so the above-mentioned misalignment could not be eliminated unless the mold was moved.

In order to solve these problems, the present inventor has provided a plunger for a molding machine with a head that is movable within a predetermined range in the radial direction with respect to the cylinder rod (Japanese Patent Laid-Open No. 58-136428). reference).

As shown in FIG. 1, a plunger 12 is attached to a cylinder rod 10 of a cylinder of a transfer molding machine.
are screwed together, and the plunger 12 is attached to the mounting shaft 14, which is a shaft body, so that the axes of the plunger 12 and the cylinder l condo 10 coincide with each other.
A pair of frame pieces 18a are screwed together, and at the tip of the handle shaft 14 there is a pair of frame pieces 18a whose axes coincide with each other as well as with the outer diameter of the handle shaft 14.

The head 26 is spaced apart from each other by the frame 16 made up of 18b.
It is set up so that it can be moved freely by the amount of barrel play.

Further, the frame 16 is fixed by a slide ring 24. The head 26 has a coil spring 28 and a push pin 3 provided in a through hole drilled in the shaft 14.
0, and at the tip of the head 26,
- A synthetic resin ring 36 that is slightly larger than the inner diameter of the bot 34 of the mold 32 is held in place by a ring 38 that is slightly smaller than the inner diameter of the bot 34. Therefore, even if the axes of the bot 34 and the head 2G do not match each other and are slightly shifted, if the range of the shift is within 2e, the head 26 moves in a direction that eliminates the shift and the axes match. However, it has the disadvantage that if the axes of the bot and the head do not match each other and there is a deviation of 20 degrees or more, the deviation cannot be corrected. This problem is particularly likely to occur in transfer molding machines that do not have a mold positioning structure, and if the axis of the plunger with respect to the bot is not aligned with the t-rad that allows the plunger tip to move freely in the radial direction. However, it is difficult to center the mold within 2e of the axis line deviation between the plunger and the bot.

The present invention was made in view of the above-mentioned drawbacks, and includes a head that is movable within a predetermined range in the radial direction with respect to the cylinder 1=J.
The purpose is to provide a plunger for a transfer molding machine that can easily fix the heads with their axes aligned with each other. a shaft body attached so that their axes coincide with each other; a frame body mounted on this shaft body so that their axes coincide with each other;
At a position where the axes of the head, which is supported by the frame body with a slight play so as to be able to move in the radial direction, and the frame body and the head coincide with each other, the navel 1 is pulled down in the axial direction.
The head is comprised of a slide ring which can be fixed to the frame body, and a stopper which raises the slide ring and fixes the slide ring at a position where the head can move in the radial direction.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the same reference numbers are used for the same parts as in FIG. 1 below.

In FIG. 2, 40 is a transfer molding machine;
It is provided with a bolster plate 44 for placing a lower mold 42 and an upper mold fixing base 46 for fixing the upper mold 32 on which the bot 34 (see FIG. 3) is formed. The Polskoo plate 44 has four guide posts) 48a, 48b (
However, it is supported by two legs (as shown) so that it can move up and down and stop at a predetermined position. Further, a cylinder 50 is fixed to the upper die fixing base 46. The plunger 12 is located in the cylinder lock 1o of the cylinder 50.
are screwed together. As is clear from FIG. 3, this plunger 12 has a take-up shaft 14 which is a shaft body that is screwed into the cylinder rotor F I O so that their axes coincide with each other.
A through hole 52 is provided in the mounting shaft 14 so as to pass through the axis. There is a screw 54 at the upper end of the through hole 52.
is engraved, and a diameter-reducing step 56 is formed in the center thereof. A push pin 3o is loosely inserted into the through hole 52, and the push pin 30 has a Qi2 provided between the recess 58 and the m-adjustment 6o screwed into the female thread 54.・It is urged downward by the elastic force of the spring 28. The downward movement range of the push pin 3o is
The head portion 58 is regulated by a dowel that comes into contact with the diameter reduction step 56. Reference numerals 18a and 18b are a pair of frame pieces obtained by dividing the frame 16 into two along the axis, each of which has upper end protrusions 20a, 20b and lower end protrusions 22a, 22b formed on its inner peripheral surface, and each has a "two-line protrusion". 20a and 20b are fitted and supported in an annular groove 62 recessed in the lower part of the mounting shaft 14.

When the frame pieces 13a and 18b are brought into contact with each other and supported in the frame 16 as described above, the outer diameter of the frame 16 is
This coincides with the outer diameter of the vertical wall 64 directly above the annular groove 62 of the l-shaft 14, and their axes also coincide with each other. 24 is each frame piece 18a.

181> is a slide ring that prevents the entire mounting shaft 14 from coming off. Reference numeral 26 denotes a head, and the lower end protrusions 22a, 22b of the frame pieces 18a, 18b fit into the annular groove 6G recessed in the upper part of the head, so that the frame pieces 18a, 18b form the shape of the frame body 16. In this case, the two walls of the annular groove 66 are in sliding contact with the upper surfaces of the respective lower end protrusions 22a and 22b and are supported. The head 26
The outer diameter of the upper part of the frame body 16 is set to be 2C smaller than the inner diameter of the frame body 16, and the diameter of the annular groove 66 portion is also set to be smaller than the inner diameter of the frame body 16.
The inner diameter of the lower end protrusions 22a and 22b is set smaller by the same amount <20. Furthermore, a stepped portion 68 is formed following the annular groove 66 of the head 26 and protrudes downward from the frame 16.
The outer diameter of the stepped portion 68 is formed to match the outer diameter of the frame 16 when the axes of the step portion 68 are made to coincide with each other. Furthermore, an annular stopper edge 70 is provided following the stepped portion 68. 72 is a slot directly below the stopper edge 70.
- It is a groove formed in an annular shape along the buckwheat edge 70.

Further, a 1-shaped groove consisting of a horizontal groove 744 and a first vertical groove 74m is cut in the vertical wall 64 of the mounting shaft 14, and the outer circumferential surface of one frame piece 18a of the frame body 16 is provided with the first vertical groove 74m. A second vertical groove 74n continuous to the first vertical groove 74rn is carved,
Two horizontal fJ74 in the horizontal direction at the bottom of the frame piece 18a
a and 74b, and the tip of one horizontal groove 74a is an open groove 74p that extends in the axial direction and penetrates below the frame piece 18a.
is engraved, and a slightly recessed stopper ti74q is engraved at the tip of the other horizontal groove 74b (fourth
(see figure). On the other hand, the vertical wall 64 and the groove 7 of the frame body 16
The slide ring 24 that slides along the groove 74 has a pin 76 which is a stopper that slides in the groove 74 and is driven into the pin hole 7B and protrudes inward (see FIG. 5). In addition, FIG. 3 shows that the bottle 76 of the slide ring 24 is
The slide ring 24 is located in the collar groove 74q, and the slide ring 24 does not correspond to the head 26, so that the belly button 12G can move in the radial direction. In addition, when the axes of the frame 24 and the throat 26 are aligned, the stepped portion 68 of the head 26
When the outer wall of the slide ring 24 is in the sliding position where the outer wall of the frame body 16 is aligned with the outer wall of the frame body 16, the bin 76 of the slide ring 24 is inserted into the open groove 74.
When the slide ring 24 is slid to position p, the lower end of the slide ring 24 comes into contact with the stopper edge 70, preventing the head 26 from moving in the radial direction (horizontal direction in the drawing). Furthermore, from this state, the bottle 76 of the slide ring 24 is moved from the open groove 74p to the horizontal groove 74a, the second vertical groove 74n, and the first vertical groove 74m.
When the slide ring 24 is further slid to the horizontal groove 746, the slide ring 24 no longer corresponds to each of the frame pieces 18a, 18b, and the frame pieces 1'8a, 18b can be separated. annular groove 6 respectively
It is possible to break away from 2.

On the other hand, a taper is provided inside the upper edge of the bot 34 so that the head 26 can be easily fitted into the bot 34;
Alternatively, as shown in FIG. 3, a radius is provided.

In addition, a first
A vertical groove 74m and a second vertical groove 7 carved in the frame piece 18a
4n, each of the frame pieces 18a, 18
As a means to prevent the reverse secession 1- of b, for example, while changing the wall thickness of the upper end protrusions 20a, 20L+ and the 10M11 protrusions 22a, 22b of each of the frame pieces 18a, 1.8b,
The width of the annular groove 62,66 into which these protrusions fit may be set.

Since the present embodiment is constructed as described above, first the slide ring 24 is moved along the groove 74 so that the bottle 76 is opened.
The axes of the frame 16 and the head 2G are aligned with each other, and the head 26 is fixed so that it cannot move in the radial direction. And, as shown in FIG. 6, there is a cylindrical cutting tool 80 that aligns the axis of the conventional fixed cutting edge and the cutting edge.

Using this set, insert the lil'+ entry part 82 at one end of the second tool 80 into the bot 34, and lower the cylinder 50 or raise the porcupine plate 44 until the fitting part 82 of the set tool 80 is The mold is moved so that the head 264 is fitted, and the fitting portion 82 of the item 1 tool 80 is fitted to the head 26. Now that the axes of the front throat 26 and the bottom 34 are almost aligned (see Figure 3), the cylinder 50 can be raised (or lowered) to the position of 44 without removing the front tool 80. . Next, insert the slide ring 24 into the groove 74) and make sure that the bottle 76 is completely flushed. m1
Slide the mold 32 to position 4q (to allow the movement of the gutter 26 in the radial direction and to the mold fixing base 46), then fix the mold 32 and place the lower mold 42 in the position 7. In addition, since the head 2 is movable in the radial direction, slight deviations in the mutual axes of the bottom 34 and the throat 26 will cause the navel F' 2G to move against the bottom and throat 34. When they are fitted together, they are guided by the radius formed on the inner upper edge of the bot 34 and the inner circumferential surface of the bot 34, so that the coil is automatically removed. Due to the bow force of the spring 28, a force greater than the pressing force of the pusher bottle 30 (unless added,
It will be maintained. For example, if the outer diameter of the head 26 is set to 50 mm, the inner diameter of the fitting part 82 of the set tool 80 is set to approximately 51.4 IN11, and the outer diameter of the insertion part 84 is set to approximately 49.97 PIN. Set and 2 again
Set e to 260-2.5 am Tears, J Mi, To 34
This can sufficiently accommodate the misalignment of the axis of the head 26.

Note that the outer diameter of the head 26 is approximately 0.0 mm smaller than the inner diameter of the bow throat 34.
．． 02mm by setting small and forming a slight gap between the groove 26 and the groove 34,
The thermosetting resin in the shape of a tablé throat placed in the mold 4 is pressurized by the head 26, and when it is gelled and poured into the upper and lower molds 32. It is possible to release the thermosetting resin 0) air (which, if it enters the molded product, will significantly reduce the quality of the product), which is generated along with a slight hack flow of the thermosetting resin with high properties. Also, a small amount of thermosetting resin that has flowed into the head 26
The thermosetting resin stored in the groove 72 provided in the groove 72 does not reach the slide ring 24, and there is no problem in replacing the head 26.

In this way, according to the present invention, the slide ring is pulled down so that the axes of the cylinder Ij are aligned with each other, the head is fixed, the mold is removed, and the axes of the head and the pot are aligned using the conventional method. The slide ring is pulled up to allow the head to move in the radial direction, and the minute misalignment between the head and the pot can be eliminated by moving the plunger head in the radial direction, so the plunger head and pot can always be aligned. are fitted in a proper state, so that so-called galling does not occur on the plunger head or the inner wall of the pot 1, allowing smooth and accurate molding work, and making it easy and quick to align the axes of the head and pot. It has great effects, such as being able to perform

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional plunger and pot, but does not show the plunger and pot.
Fig. 2 is an overall front view of the transfer molding machine, Fig. 3 is a partially cutaway sectional view showing the plunger and pot, Fig. 4 (al, (bl) is a front view and bottom view showing the frame, Fig. 5 The figure is a partially cutaway cross-sectional view of the slide ring, and Figure 6 is a partially cutaway cross-sectional view of the center tool. 10... Cylinder Rond, 12... Plunger, 14... Mounting shaft, 16...・Frame body, 18a, 18
b...Frame piece, 20a. 20b... Upper end protrusion, 22a, 22b... Lower end protrusion, 24... Slide ring, 26... Head, 2
8...Coil sprink. 30...Push bottle, 32...Upper mold. 34...Pot, 36...Synthetic resin ring. 38... Tightening naso l-, 40... 1-Lance support molding machine, 42... Lower mold, 44... Polscoubray 1, 46... Upper mold fixing stand. 48a, 48b ・ ・ Guide post, 50 ・ ・
・Cylinder, 52...Through hole, 54...Female thread, 5
6... Diameter reduction step, 58... Head, 60... Adjustment screw, 62... Annular groove. 64... Vertical wall, 66... Annular groove, 68... Step portion, 70... Stroke/flange edge, 72... Concave groove, 74
--Groove, 74a, 74b...Horizontal groove, 74N...
・Horizontal groove, 74m...First vertical groove, 74n...Second vertical groove, 74p...Open groove, 74(1...Stopper groove. 76...Bin, 78...Bin hole, so...set tool, 82...fitting part, 84...insertion part. Figure 1 Figure 2 Figure 3 Procedural amendment April 9, 1982 1 Indication of case Showa leap year patent application no. 192674 υ 2, Name of the invention Transfer molding machine plunger 3, Relationship with the case of the person making the amendment Special γ1 Applicant Yama 7 Mago Yuima Representative name Yama 1) Masaru Line 4, Agent 8 Contents of the amendment As per attached sheet 8. Contents of the amendment 1) On page 16 of the specification, lines 10 to 11, the phrase 1 “Figure 5 is a partially cutaway sectional view of the slide ring” has been changed to “
5 is a partially cutaway sectional view of the slide link."

Claims (1)

[Claims] 1. Install the cylinder rods of the cylinders installed in the transfer molding machine so that their axes coincide (=J
a frame body attached to the shaft body so that their axes coincide with each other, and a head supported by the frame body with a slight play so as to be able to move in the radial direction. and a slide ring that can fix the head to the frame by pulling it down in the axial direction at a position where the axes of the frame and the head coincide; Plunge U-0 of a transfer molding machine characterized by comprising a stopper that fixes a slide ring in a movable position.