JPS62201214A - Simple transfer molding equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simple transfer molding device that is easily portable.

[Prior art and problems]

There is a need for a portable, small, lightweight, and inexpensive transfer molding device suitable for molding optical fiber connectors and the like. Aiming at such a portable type, we separately proposed a transfer molding device that is a smaller version of the conventionally used transfer molding device. (Japanese Patent Application No. 108433, "Transfer Molding Apparatus") The outline of this apparatus is as follows. That is, FIG. 3(A) is a partially sectional front view of the apparatus, and FIG. 3(B) is a sectional view taken along line AA in FIG. 3(A).

In the drawings, reference numerals 1 and 2 indicate upper and lower heating plates each having a heater therein, and the upper heating plate 1 is equipped with a resin pot 3 that fits into the head of a plunger 6. 4 is a mold equipped with a spool 5. This mold 4 is clamped by being sandwiched between the upper and lower heating plates 1 and 2, and the clamping force is determined by compression provided on both sides of the lower part of the upper heating plate 2. It is caused by a spring 9,
By moving the heating plate 2 up and down, the clamp of the mold 4 can be opened and closed. Its structure is as follows: (a) As shown in the figure, the eccentric cam type lever 11 located on the axis 9 of the compression spring on both sides of the lower part of the upper heating plate 2 is tilted 90 degrees, and the eccentric cam The compression spring 9 provided at the bottom is compressed to enable the attachment and detachment of the mold 4. At this time, by designing the tangent of the cam to be horizontal, no component force is generated and the position is can be maintained naturally. Moreover, when this eccentric cam type lever lever 11 is placed vertically, a movement opposite to that of two legs occurs,
The upper heating plate 2 is raised by the compression spring 9 and the mold 4 is clamped between it and the upper heating plate 1.

In addition, the lower heating plate 2 is provided with a grooved guide portion 8, which allows for stable positioning of the spool 5 of the mold 4 and the resin pot 3 of the upper heating plate 1, and also allows the grooves to remove dust. can also be removed naturally.

In particular, by providing a hole at the back of the groove, garbage will naturally fall through the hole.

Furthermore, a hole for a thermocouple is provided at the back of the mold, and by inserting the mold 4 along the grooved guide part 8, a temperature sensor is attached to this hole between the upper and lower parts L2. The terminal 13 is inserted and the mold temperature can be automatically detected.

The plunger 6 is loaded with tension by tension springs 7 installed on both sides of the upper heating plates 1 and 2, and is attached to the shaft of an electric motor 10 installed at the bottom of the upper heating plate 2. The cam 12 rotates and accumulates tension, and during molding, the cam 12 rotates in the opposite direction, and the plunger 6
By lowering the guide shaft 14 in contact with the bot 3, the resin of the bot 3 is pressurized according to the accumulated tension, and the resin is injected from the spool 5 into the mold 4. Note that the cam surface of the cam I2 before molding is located almost horizontally and is configured not to receive partial pressure.

Normally, when inserting and removing the mold 4, the stroke of the vertical movement of the upper heating plate 2 due to the inclination of the double eccentric cam type lever 11 is small enough to cause no particular problem, but in the unlikely event that something goes wrong. so that the mold can be easily removed.
The stroke may also be changed. in particular,
Adjust the position of the pin +7 (axis center of the lever 11) inserted into the elongated hole 16 of the shaft 15. Push down by rotating the lever 18, and lower the mold stand 19 against the compression force of the compression spring 9. , so that the stroke of the upper heating platen 2 may be adjusted.

In order to more evenly transmit the clamping force to the entire mold 4, a spring 2 (11) or a pivot (not shown) may be interposed between the upper heating platen 2 and the mold stand 19.

Comparing this to conventional molding equipment that uses hydraulic pressure, by using a small motor, the overall size is considerably smaller,
Although weight reduction will be achieved, the weight of this drive device and the control device attached to it reaches as much as 20 kg, and the mechanism and structure are complicated. The issue of what can be handled has not been sufficiently resolved.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the shortcomings of conventional products such as the dual-unit type, the present invention aims to provide a transfer molding device that is smaller, lighter, cheaper, and easier to handle.

[Means to solve the problem]

In order to achieve the above object, the molding apparatus of the present invention fixes an upper heating plate provided with a resin pot to the inner upper part of a cylindrical metal frame so that the power source is operated manually, An upper heating plate that is guided up and down without rotation is provided at the lower part of the inner side of the frame, and a clamp mechanism is provided below via a spring to clamp the mold placed on the upper heating plate between the upper and lower heating plates. On the other hand, a guide cylinder is connected to the upper part of the frame, and a plunger whose head faces the resin pot and is guided up and down without rotating is arranged in the guide cylinder, and the upper part of the plunger is connected to the upper part of the frame. A manual drive mechanism is provided on the side to provide vertical movement to the plunger.

The present invention will be explained below with reference to an embodiment shown in FIG.

In the figure, 21 is a cylindrical metal frame. 22 is a guide cylinder connected and fixed to the -L portion of the cylindrical metal frame 21, 22' is a cap of the guide cylinder, 23 is a rotating shaft rod, and 24 is a flange protruding from one end of the rotating shaft rod 23. Further, 25 is a plunger 7, 25' is a plunger head, 26 is a plunger guide shaft integrally connected to the plunger 25 with a screw, and 27 is a guide shaft cap, which is connected to the plunger guide shaft 26 with a screw. It is something.

The surface of the rotary shaft rod 23 is threaded, and is screwed into a threaded hole provided at the center of the camp 22' of the guide cylinder 22 to rotate a drive handle 28 detachably attached to one end of the rotary shaft rod 23. By doing so, flange 2
You can lower 4 by 1. A manual rotary drive mechanism A is formed by these.

On the other hand, the plunger guide shaft 26, which is integrated with the plunger guide shaft 25 by a screw, has an engaging portion formed on its outer circumferential surface, such as a key, which engages with an axial groove provided on the inner circumferential portion of the guide cylinder 22. The structure may be such that the plunger is slid and guided by the driving force of the rotary drive mechanism A without rotating downward. Also, instead of engaging the key and the groove, the plunger 25 holds the steel ball 29 at the center of the shaft on the side facing the flange 24 of the rotating shaft rod 23, and due to its low frictional resistance, the rotating shaft rod 23
It may be configured such that only the downward driving force is transmitted to the plunger 25 without transmitting the rotational force of the plunger 25. The point is that the plunger 25 may be configured to slide without being rotated downward by the driving force from the rotary drive mechanism A.

Note that the steel ball 29 may be formed so as to be held in its position by a groove formed in the flange 29 and the plunger 25.

30 has a resin bot 31 at its center, and is fixed on the ceiling side of the cylindrical metal frame 21 with bolts. 40 is a heat insulating material stretched on two sides except for the bot 31. 32 is an upper heating plate, and its two sides are provided with recesses 32' for holding the mold 33 in a fixed position. 34 is a guide plate arranged below the upper heating plate 32 with the spring 35 in between, 3B is a guide shaft of the guide plate 34, and 37 is a guide plate symmetrical to the lower part of the guide plate integrated with the guide plate 34. This is a pin attached to the

Reference numeral 38 designates two eccentric cam type lever levers which are rotatably supported by a shaft 39 on the frame 2I in a center symmetrical manner at the lower part of the cylindrical metal frame 21, and the ends thereof are connected to the cam surface. , located below the guide plate 34,
The installation using the shaft 39 is bent almost at right angles beyond the position,
It extends upward along the cylindrical metal frame 21. These constitute a clamp mechanism that clamps the mold 33 between the upper and lower parts 30 and 32. Note that the guide plate 34 has a guide portion between it and the cylindrical metal frame 21, and does not rotate when the metal or the like moves up and down, as will be described later. Although not shown, the mold 33 is
The insertion portion provided on the front surface of the cylindrical metal frame 21 can be positioned by the recess 32' on the upper heating plate 32. A spool for resin injection is placed in the center of the upper surface of the mold 33, centered on the resin bottle 31 on the upper side.

〔motion〕

When the device is in operation, the mold 33 is placed in a predetermined position on the upper heating plate 32, and when the two eccentric cam type lever levers 38 are tilted to the left and right in the figure, the lower surface of the guide plate 34 is lifted and the upper heating plate 32 is moved.
0. The mold 33 is clamped in a sandwich shape by the upper heating plate 32. At this time, some of the cam surfaces 41 are located exactly on the shaft 39.
Spring 3 located horizontally above and symmetrical to this
5 stabilizes the clamping force at this position.
Make it certain. The mold 33 is clamped and the bot 3
When the molding resin is inserted into the tube 1 and the molding conditions are set, the control system (not shown) will display (instruct) the start of molding, so the drive handle 28 will be manually rotated and the rotating shaft rod 23 will be driven by a screw. to lower the plunger 25. At this time, the flange 24 at the tip of the rotating shaft rod 23 is connected to the plunger 25.
However, the plunger guide shaft 2B, which is integrated with the plunger 25, slides downward without rotating due to the engagement with the guide cylinder 22, and slides the plunger head 25' in the opposite direction. to the bot 31. The plunger head 25' further descends and the bot 3
Manual rotation of the drive handle 28 is stopped in a state in which the resin in the mold 1 is sent out to the mold 33.

After the molding in the mold 33 is completed, when the drive handle 28 is reversely rotated in accordance with the completion display (instruction) of the control system (not shown), the plunger guide shaft 26 is guided by the flange 24 as the rotating shaft rod 23 rises. The shaft cap 27 engages and pulls the plunger 25 upward.

After returning the extrusion system in this manner, when the eccentric cam type lever 38 is pulled up, the lower side of the end of the lever 38, which is rotated by the shaft 39, engages with the pin 37 on the lower side. The guide plate 34 integrated with the pin 37 is lowered, and the upper idiom 32 is lowered and returned together with the guide plate 34 via the spring 35.
The mold 33 can now be taken out.

Next, another embodiment of the present invention will be described based on FIG. 2. In addition, parts given the same reference numerals as in FIG. 1 indicate the same or corresponding parts. In the illustrated example, the manual drive mechanism A
As shown in FIG.
A set of levers is used, which consists of a link 55 which is fixed to the lever 53 at one end and to the plunger guide shaft 26 at the other end by a pin 54.

The clamp mechanism B includes a screw shaft 57 rotatably provided on the cylindrical metal frame 21 via a bearing 56, and a nut 58 screwed into the screw of the screw shaft 57.
and a link 60 whose one end is secured to the nut 58 and the other end is secured to the guide plate 34 by a pin 59, respectively;
A jack type mechanism is used, which includes a handle 6I that rotates the screw shaft 57.

This embodiment also provides the same effects as the embodiments described above.

〔effect〕

The lamp, extraction of the mold, extrusion of the resin material, and many parts that require driving force are configured so that they can be performed manually, eliminating the need for a motor as previously proposed, making this type of equipment smaller and lighter. It can be easily handled as a portable type.

[Brief explanation of drawings]

FIGS. 1 and 2 are front views, partially in section, of different embodiments of the present invention. Figure 3 shows the previously proposed small transfer, (a) is a front view of the device partially cut away, and (b) is the A of figure (a).
-A sectional view. 21... Cylindrical metal frame, 22... Guide cylinder, 22'... Guide cylinder cap, 23...
Rotating shaft rod, 24...flange, 25...plunger, 25'...plunger head, 26...plunger guide shaft, 27...guide shaft cap, 28
・・・Drive handle, 29...Steel ball, 30...'' two idioms, 31...Resin pot, 32...Advanced idioms, 3
3... Metal fittings, 34... Guide plate, 35... Spring,
36... Guide shaft, 37... Pin, 38... Eccentric cam lever lever, 39... Shaft on cylindrical metal frame, 40... Heat insulating material, 41... Partial cam surface, A...
Manual drive mechanism, B...clamp mechanism.

Claims (1)

[Claims] An upper heating plate equipped with a resin pot is fixed to the inner upper part of the cylindrical metal frame, and a lower heating plate that is guided up and down without rotating is provided at the inner lower part of the frame, and is attached to the lower side via a spring. A clamping mechanism is provided for clamping the mold placed on the lower heating platen between the upper and lower heating plates, and a guide cylinder is connected to the upper part of the frame, and the head of the mold is connected to the resin pot within the guide cylinder. A plunger is installed that faces the and is guided up and down without rotating.
A simple transfer molding device characterized in that it has a manual drive mechanism on its upper side that gives vertical movement to the plunger.