JPH0363934B2 - - Google Patents

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. 106433/1983. "Transfer molding device") The outline of this device is as follows. That is, FIG. 3A is a partially sectional front view of the device, and FIG. 3B is a sectional view taken along line A--A in FIG.

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 provided with a resin pot 3 that fits into the head of a plunger 6. 4
is a mold equipped with a spool 5, and this mold 4 is clamped by being sandwiched between the upper and lower heating plates 1 and 2, and the clamping force is provided by compression springs provided on both sides of the lower part of the lower heating plate 2. 9, and by moving this heating plate 2 up and down, the clamp of the mold 4 can be opened and closed. As shown in Figure A, the structure is as follows: By tilting the eccentric cam type lever levers 11 90 degrees, which are located on the axis of the compression springs 9 on both sides of the lower part of the lower heating plate 2, By compressing the compression spring 9 provided at the bottom, it is possible to attach and detach the mold 4. At this time, by designing the tangent of the cam to be horizontal, the position can be adjusted without the generation of component force. It is now possible to maintain it naturally. When the eccentric cam type lever 11 is made vertical, the opposite operation to that described above occurs, and the compression spring 9 causes the lower hot platen 2 to rise and clamp the mold 4 between it and the upper hot platen 1.

Further, the lower hot plate 2 is provided with a grooved guide portion 8, which allows the spool 5 of the mold 4 and the upper hot plate 1 to be connected.
The resin pot 3 can be stably positioned, and dirt can also be naturally removed by the groove.
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, it can be attached to this hole between the upper and lower heating plates 1 and 2. The temperature detection 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 and lower heating plates 1 and 2, and a cam attached to the shaft of an electric motor 10 installed at the bottom of the lower heating plate 2. 12 rotates,
During molding, the cam 12 rotates in the opposite direction, and the plunger 6 pressurizes the resin in the pot 3 according to the accumulated tension by lowering the guide shaft 14 in contact with the cam 12. From mold 4
Inject resin inside. Note that the cam surface of the cam 12 before molding is positioned substantially horizontally and is configured not to receive partial pressure.

Normally, when putting in and taking out the mold 4, the stroke of the vertical movement of the lower heating plate 2 due to the tilt of the eccentric cam type lever 11 described above is a small stroke that does not cause any trouble, but in the unlikely event that the mold The stroke may be modified so that the mold can be easily removed. Specifically, the long hole 1 of the shaft 15
The position of the pin 17 (axis center of the lever 11) inserted through the lever 6 is pushed down by rotating the adjustment screw 18, and the mold stand 19 is lowered against the compression force of the compression spring 9, thereby lowering the heat. The configuration may be such that the stroke of the board 2 is adjusted.

In order to more evenly transmit the clamping force to the entire surface of the mold 4, a spring 20 or a pivot (not shown) may be interposed between the lower heating platen 2 and the mold stand 19.

Comparing this to conventional molding equipment that uses hydraulic pressure, the use of a small motor makes it considerably smaller overall. Although weight reduction will be achieved, the weight of this drive device and the control device attached to it reaches 20 kg, and the mechanism and structure are complicated.
In addition, considering the large weight, the problem of being a portable type that can be easily handled has not been sufficiently solved.

[Purpose of the invention]

In view of the above-mentioned drawbacks of conventional products, 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 the cylindrical metal frame so that the power source can be operated manually, A lower heating plate that slides inside the frame without rotating and is guided up and down is provided at the inner lower part of the frame, and a mold placed on the lower heating plate is raised on the lower side via a spring. A guide plate is provided which can be clamped between the upper and lower hot plates, and a guide cylinder is connected concentrically to the upper part of the frame, and the head of the guide cylinder faces the resin pot and rotates. A plunger guide shaft that slides on the guide cylinder and is guided up and down without moving is disposed, and a manual drive mechanism is provided on the upper side of the plunger guide shaft for imparting vertical movement to the plunger guide shaft. It is a simple transfer molding device.

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 concentrically connected and fixed to the upper part 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, 25' is a plunger head, 26 is a plunger guide shaft integrally connected to the plunger 25 by screws, and 27 is a guide shaft cap, which is connected to the plunger guide shaft 26 by screws. .

The surface of the rotary shaft rod 23 is threaded, and is screwed into a threaded hole provided at the center of the cap 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, the flange 24 can be moved up and down. A manual rotary drive mechanism A is formed by these.

This mechanism facilitates alignment of the plunger head and the resin pot of the upper hot plate, which will be described later.

On the other hand, the plunger guide shaft 26, which is integrated with the plunger 25 by a screw, has an engaging portion formed on its outer circumferential surface, such as a key, which is connected to the guide cylinder 22.
It may be configured such that it engages with an axial groove provided on the inner circumferential surface of the rotary drive mechanism A and is guided by sliding without rotating in the vertical direction by the driving force of the rotary drive mechanism A. In addition, instead of the engagement between the key and the groove, the plunger 25 can hold the steel ball 25 at the center of the axis of the rotating shaft rod 23 on the side facing the flange 24.
9 may be held, and its low frictional resistance may be configured to transmit only the driving force in the vertical direction to the plunger 25 without transmitting the rotational force of the rotating shaft rod 23. The point is that the plunger 25 may be configured to slide without being rotated in the vertical direction 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 is an upper heating plate having a resin pot 31 at its center, and is fixed to the ceiling side of the cylindrical metal frame 21 with bolts. 40 is pot 31
The insulation material is placed on the top surface except for. 32 is a lower heating plate, and its upper surface is provided with a recess 32' for holding the mold 33 in a fixed position. 34 is a guide plate arranged below the lower heating plate 32 with the spring 35 in between, 36 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

38 is the lower part of the cylindrical metal frame 21,
Two eccentric cam type lever levers are rotatably supported on the frame 21 by a shaft 39 in a center-symmetrical manner, the ends of which have cam surfaces, and are located below the guide plate 34. , beyond the attachment position by the shaft 39, are bent at a substantially right angle, and extend upward along the cylindrical metal frame 21. These constitute a clamping mechanism B that clamps the mold 33 between the upper and lower heating plates 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 mold or the like moves up and down, as will be described later. Therefore,
According to this configuration, when clamping or removing the mold, the cylindrical metal frame also serves as a guide for the vertical movement of the lower hot plate, so in addition to accurately and securely clamping the mold, there is no need to provide a separate guide. , the structure can be made simple and compact. Although not shown, the mold 33
can be positioned by the recess 32' on the lower heating plate 32 from the insertion part provided on the front side of the cylindrical metal frame 21. The mold 33 has a spool for injecting resin centered on the upper resin pot 31 at the center of its upper surface.

〔motion〕

While the device is in operation, place the metal 33 in a predetermined position on the lower heating plate 32, and press the two eccentric cam type lever levers 3.
8 is tilted to the left or right in the figure, the lower surface of the guide plate 34 is lifted, and the upper heating plate 30 and lower heating plate 32 clamp the mold 33 in the shape of a sanderch. At this time, some of the cam surfaces 41 are just above the shaft 39,
The interposition of the spring 35 located horizontally and symmetrically thereto makes the clamping force stable and reliable in this position. When the mold 33 is clamped, the molding resin is inserted into the pot 31, and the molding conditions are set, the control system (not shown) displays (instructs) to start molding, so the drive handle 28 is manually rotated. The plunger 25 is lowered by screwing the rotary shaft rod 23. At this time, the rotating shaft rod 23
The flange 24 at the tip of the plunger 25 lowers the plunger 25, but the plunger guide shaft 26, which is integrated with the plunger 25, slides and lowers without rotating due to engagement with the guide cylinder 22.
The plunger head 25' is guided in a sliding manner into the opposite pot 31. Plunger head 2
5' further descends and transfers the resin in the pot 31 to the mold 3.
3, manual rotation of the drive handle 28 is stopped.

After 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 attached to the flange 24 as the rotating shaft rod 23 rises.
The guide shaft cap 27 engages and pulls the plunger 25 upward.

After the extrusion system is restored in this way, 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. Then, the guide plate 34 integrated with the pin 37 is lowered, and the lower heating plate 32 on the upper side is lowered via the spring 35.
is lowered and returned together with the guide plate 34, and the mold 33 can be taken out.

Next, another embodiment of the present invention will be described based on FIG. 2. Note that parts given the same reference numerals as in FIG. 1 indicate the same or corresponding parts. In the illustrated example, the guide cylinder 2 is used as the manual drive mechanism A.
2, a lever 53 whose one end is stopped by a pin 52, and a link 55 whose one end is fixed to the lever 53 and the other end is fixed to the plunger guide shaft 26 by a pin 54. It uses a lever type consisting of.

The clamping mechanism B includes a screw shaft 57 rotatably provided on the cylindrical metal frame 21 via a bearing 56, a nut 58 screwed onto the thread of the screw shaft 57, and one end of which is connected to the nut. 58 and the other end guide plate 34, respectively.
9 and the screw shaft 57
This uses a jack type, which consists of a handle 61 that rotates.

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

〔effect〕

As explained above, the present invention is configured so that many parts requiring driving force, such as clamping the mold in place, extracting the mold, and extruding the resin material, can be performed manually. This eliminates the need for a motor like this, making this type of device smaller and lighter, and it can be easily handled as a portable device.

[Brief explanation of drawings]

FIGS. 1 and 2 are front views, partially in section, of different embodiments of the present invention. FIG. 3 shows a previously proposed small-sized transfer, where A is a partially sectional front view of the device, and FIG. 21...Tubular metal frame, 22...Guide cylinder, 22'...Guide cylinder cap, 2
3... Rotating shaft rod, 24... Flange, 25... Plunger, 25'... Plunger head, 2
6...Plunger guide shaft, 27...Guide shaft cap, 28...Drive handle, 29...Steel ball, 30...Top heating plate, 31...Pot for resin, 3
2...Lower heating plate, 33...Metal fittings, 34...Guide plate, 35...Spring, 36...Guide shaft, 37...
Pin, 38...Eccentric cam type lever, 39...
Shaft on cylindrical metal frame, 40...Insulating material, 41
... Partial cam surface, A ... Manual drive mechanism, B
...clamp mechanism.

Claims (1)

[Claims] 1. An upper heating plate equipped with a resin pot is fixed to the upper inner side of a cylindrical metal frame, and a lower heating plate that slides inside the frame without rotating and is guided up and down is fixed to the lower inner side of the frame. A guide plate is provided on the lower side via a spring to allow a mold placed on the lower hot plate to be clamped between the upper and lower hot plates by rising, and a guide cylinder is provided on the upper part of the frame concentrically with the frame. A plunger guide shaft is disposed within the guide cylinder, the head of which faces the resin pot, and which slides on the guide cylinder without rotating and is guided up and down. A simple transfer molding device characterized by having a manual drive mechanism for imparting vertical movement to the plunger guide shaft.