JPH0295810A - Method and apparatus for conveying and supplying preheated resin tablet - Google Patents

Abstract

PURPOSE:To efficiently and surely convey and supply a preheated resin tablet by a method wherein the preheated resin tablet is supported by suction. CONSTITUTION:In the suction supporting process of a preheated resin tablet 11, a suction supporting means 4, which is provided for supporting (fixing) the preheated resin tablet 11 by suction, is actuated by the forcible sucking action applied from vacuum source. Concretely, a suction pad 41 set so as to make contact with and part from the upper edge face part of a preheated resin tablet 11, which is arranged at the central position of a space between respective anchoring pins through the guiding (position correcting) action of the respective anchoring pins 31 in an anchoring process, is provided in the suction supporting means 4. Accordingly, by actuating vacuum source under the condition that the suction pad 41 is joined to the upper edge face part of the preheated resin tablet is provided so as to be able to surely support by suction.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a method for transporting and supplying a thermosetting resin material used for molding electronic components such as ICs, diodes, and capacitors with resin. The present invention relates to an improvement in a conveyance/feeding device, and particularly to a device for efficiently and reliably conveying and feeding preheated (preheated) resin tablets into a mold pot in a resin sealing molding device.

[Conventional technology]

In order to seal and mold electronic components with thermosetting resin materials,
Conventionally, transfer resin molding methods and apparatus have been employed.

This resin molding apparatus includes, for example, a fixed upper mold, a movable lower mold installed opposite to the upper mold, a pot for supplying resin material arranged on the lower mold side, and a mold fitted into the pot. A plunger for pressurizing the resin material, a cavity for resin sealing molding of electronic components placed opposite to the P and L (parting line) surfaces of both upper and lower molds, and a cull section placed between this cavity and the above pot.・Equipped with a passageway for transferring molten resin material consisting of a runner part and a gate part.

Furthermore, resin sealing molding of electronic components using this apparatus is performed in the following manner.

First, when opening both the upper and lower molds, a lead frame with electronic components mounted thereon is fitted into a predetermined position in the setting grooves formed on the P and L surfaces of the lower mold, and a resin tablet is supplied into the pot. In this state, the lower mold is moved upward to clamp the two molds together. At this time, the resin tablet supplied into the pot is heated and melted by the heaters provided in both molds, so when it is pressurized with a plunger, the molten resin material passes from the pot into the upper and lower sides through the transfer passage. Next, after the required curing time, the lower mold is moved down and both molds are opened again, and the resin is molded inside the transfer passage and both cavities. Release the body using both upper and lower ejector pins. Next, by removing unnecessary parts of the resin molded body and unnecessary parts of the lead frame, it is possible to obtain a product in which electronic components are sealed and molded within the resin molded body corresponding to the shapes of both cavities.

[Problem that the invention seeks to solve]

By the way, during the resin encapsulation molding described above, especially when the shape (weight) of the resin tablet is relatively large, the resin tablet may be placed in the mold pot for the purpose of improving resin molding efficiency and quality of the molded product. It is customary to preheat the resin material by heating and softening the resin tablet to a required temperature before supplying it.

In addition, as a conventional resin tablet conveyance/supply device, for example, a tablet storage case or a tablet chuck mechanism is used to transfer resin tablets between a hopper that accommodates a large amount of resin tablets and a mold in a resin sealing molding device. There is a known structure in which a reciprocating member is arranged so as to be reciprocally movable by a required reciprocating mechanism.

However, such a conventional conveyance and supply device has the following problems when such a conventional conveyance and supply device is used as a conveyance and supply device for preheated resin tablets.

That is, in the above-mentioned storage case type transport and supply device, a large transport member is provided with a resin tablet storage hole, a shutter mechanism for opening and closing the storage hole, etc., and the transport member is moved in a reciprocating manner. Since a reciprocating mechanism or the like is required to move the device, there is a problem in that its overall shape and configuration become larger and more complicated.

In addition, in a conveyance/feeding device using a chuck mechanism for resin tablets, the resin tablets can be
If the resin tablet is preheated to a temperature of 65°C, the resin tablet becomes soft and the locking action by the chuck mechanism cannot be performed efficiently. Therefore, it is practically impossible to use this as a conveyance/feeding device for preheated resin tablets. The problem was that it was technically impossible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus that can efficiently and reliably transport and supply preheated resin tablets in order to overcome the conventional problems as described above.

[Means for solving problems]

A method for transporting and supplying preheated resin tablets according to the present invention in order to solve the above-mentioned conventional problems is characterized in that the preheated resin tablets are transported and supplied in a state where the preheated resin tablets are supported by suction.

Further, the method for conveying and supplying a preheated resin tablet according to the present invention is characterized in that the preheated resin tablet is stopped by a required stop member, and the preheated resin tablet is suction supported and conveyed. It is something to do.

Further, the preheated resin tablet conveyance and supply device according to the present invention includes a preheated resin tablet locking means that locks a preheated resin tablet at a predetermined position, and a preheated resin tablet suction support that suction supports a preheated resin tablet at a predetermined position. and means for transporting the preheated resin tablets that are locked and suction-supported by the locking means and suction-supporting means.

Further, in the preheated resin tablet conveyance and supply device according to the present invention, the above-described locking means for the preheated resin tablet is provided to engage with the peripheral surface of the preheated resin tablet, and the preheated resin tablet is The tablet suction support means is provided so as to be suctioned to the end face portion of the preheated resin tablet.

Further, the preheated resin tablet conveyance and supply device according to the present invention is characterized in that the above-described locking means for the preheated resin tablet is composed of a required plurality of locking pins.

Further, in the preheated resin tablet conveyance and supply device according to the present invention, the above-mentioned preheated resin tablet locking means includes a peripheral surface locking portion formed in a shape that joins to the peripheral surface portion of the preheated resin tablet. It is characterized by the fact that

Further, the preheated resin tablet conveyance and supply device according to the present invention includes a preheated resin tablet suction support means for suctioning and supporting the preheated resin tablet, and a preheated resin tablet fixed guide means disposed at an outer peripheral position of the suction support means. and a conveyance means for the preheated resin tablets suction-supported by the suction support means.

[Effect]

According to the method and structure of the present invention described above, even if the resin tablet is heated and softened to a temperature of about 90° C., the function of adsorbing and supporting the preheated resin tablet and transporting it is not impaired.

In addition, by using the suction support function of the preheated resin tablet together with the locking function of the preheated resin tablet that locks the preheated resin tablet at a predetermined position, the suction support of the preheated resin tablet and its conveying and supplying action can be performed more efficiently. , and can be performed reliably.

Further, according to the present invention, the shape of the device is reduced and its configuration is simplified.

〔Example〕

Hereinafter, the present invention will be explained based on embodiment figures.

1 and 2 schematically illustrate the method and arrangement of the present invention.

Each figure (1) shows the preheating process of the resin tablet. In this preheating step, the resin tablet 1 is heated using a roller electrode type high frequency preheater 2 equipped with a flat upper electrode 21 and a lower electrode 22 consisting of two rollers. A parallel plate preheater or other preheater (not shown) with electrodes may also be used. Further, in this preheating step, the resin tablet 1 is preheated to a temperature of, for example, about 80 to 90°C.

Note that, following the preheating step, there is an arranging step (not shown) of preheated resin tablets in which the preheated resin tablets that have undergone this step are sequentially arranged in a predetermined posture and position in preparation for the next step. It's okay.

Each figure (2) shows the locking process of the resin tablet 11 which has undergone the preheating process and the adsorption and supporting process thereof.

In this locking step of the preheated resin tablet II, a locking means 3 is shown which is comprised of three locking pins 3I provided to be engaged with and detached from the peripheral surface of the preheated resin tablet II. This locking means 3 includes each of the locking pins 3 described above.
1 in the direction of narrowing the structural space between the respective locking pins (that is, in the direction from the position shown by the solid line in 21 to the position shown by the chain line in each figure), and the circumference of the preheated resin tablet 1! They are provided so that the tablet can be reliably locked by engaging with the respective surfaces.The locking pins 31 may be formed of ordinary pin-shaped members (A). In addition, when the preheated resin tablet 11 is locked with each locking pin, the preheated resin tablet 11 is locked with a required elasticity for the purpose of preventing the tablet from being damaged or missing. For this purpose, the locking pins themselves may be formed of a required elastic member.Furthermore, each of the locking pins 31 may be When moving in the direction of narrowing the constituent space, a guiding action for guiding the preheated resin tablet 11 placed in the space to the center position of the space, and an action for correcting the arrangement position of the preheated resin tablet are performed simultaneously. It is something to do.

In addition, in the suction and support step of the preheated resin tablet 11 described above, suction and support means is provided to suction support (suction fixation) the preheated resin tablet 11 by a forced suction action from a vacuum source (not shown). 4 is shown. That is, the suction support means 4 has a preheated resin tablet 11 placed at the center of the space between the locking pins 31 by the guiding (position correction) action of the locking pins 31 in the locking process described above. A suction cup 41 is provided so as to move toward and away from the upper end surface of the holder. Therefore, by joining the suction cup 4 to the upper end surface of the preheated resin tablet 1 and activating the vacuum source, the preheated resin tablet can be reliably suctioned and supported.

In addition, in the above embodiment, the preheated resin tablet 11
Although a case has been described in which the locking step precedes the suction support step, the opposite method may be adopted in which the suction support step precedes the suction support step.

For example, by arranging the preheated resin tablets 1 □ at predetermined positions by the preheated resin tablet alignment process described above, the predetermined value W (upper end surface portion, etc.) of the tablets 11 is ensured by the suction support means 4. By suctioning and supporting the tablet, and then auxiliary locking the peripheral surface of the tablet with each locking pin 31, the two means (3 and 4)
) may be used to securely lock the preheated resin tablet 1□.

The suction cup 4 of the suction support means 4 is set to move toward and away from the upper end surface of the preheated resin tablet 11, and each of the locking pins 31 of the locking means 3
Although the case is explained in which the preheated resin tablet 11 is set to come into contact with and leave the peripheral surface of the tablet 11, if necessary, these contact and separation positions may also be set so that they are opposite to each other. good.

That is, when the diameter of the resin tablet 1 formed into a shaft shape and the inner diameter of the pot in the mold are approximately the same size, the above embodiment is preferable, but the inner diameter of the pot is formed large and the preheating If the configuration is such that there are no restrictions on the posture when feeding the resin tablet into the pot, the positions of the two means (3 and 4) mentioned above can be set arbitrarily. Therefore, the suction support means 4
In short, it is sufficient that the locking means 3 is provided so as to be able to reliably adsorb and support the preheated resin tablet 11.
．． It suffices if the setting is such that it can be securely or auxiliarily locked.

Further, the locking means 3 may be provided in a manner that can lock the preheated resin tablet h in a well-balanced manner. Therefore, for example, as shown in FIG. may be arranged at equal intervals in the circumferential direction of the tablet 11.Furthermore, the locking means 3 may include:
As shown in FIG. 4, it may be composed of a peripheral surface locking part 32 formed in a shape to be joined to the peripheral surface of the preheated resin tablet 11. In short, as described above, the outer surface of the tablet Any material may be used as long as it can be joined to and securely locked.

Each figure (3) shows a state in which the preheated resin tablet 11 is securely locked by the above-mentioned locking means 3 and also securely suction-supported by the suction support means 4.
3) to +5) indicate the conveyance process of the tablet 11 and its supply process.

That is, as shown in each figure (3), the preheated resin tablet h that is locked and supported by suction can be transported in that state to a position above the mold bot 6 in the resin sealing molding device 5. It is set up like this. The conveyance means for conveying the preheated resin tablet 11 can be configured by, for example, an appropriate reciprocating mechanism (not shown) using a hydraulic, pneumatic or electric moder as a driving source.

Further, the preheated resin tablet 1+ that has been transported to the upper position of the mold bot 6 releases the locking action of the locking means 3 on the tablet 1 and the suction support action of the suction support means 4 on the tablet 11, respectively. By doing so, the first
As shown in Figure (5), it can be dropped and supplied into the pot 6.

Further, the resin encapsulation molding device 5 has the same configuration as the conventional resin molding device described above. Therefore, electronic parts can be molded with resin by the same operation as described above.

According to the method and structure of the embodiment described above, even if the resin tablet 1 is heated and softened to a temperature of about 90° C., the function of adsorbing and supporting the preheated resin tablet and transporting it will not be impaired. .

In addition, by using the suction support function of the preheated resin tablet together with the locking function of the preheated resin tablet that locks the preheated resin tablet at a predetermined position, the suction support of the preheated resin tablet and its conveying and supplying action can be performed more efficiently. , and can be performed reliably.

Further, according to the present invention, the device shape is reduced in size and its configuration is simplified.

The above-mentioned embodiment uses both the function for suction-supporting the preheated resin tablet and the function for locking the preheated resin tablet at a predetermined position. Although a case has been described in which this is carried out more efficiently and reliably, the basic feature of the present invention is that the preheated resin tablet is transported and supplied in a suction-supported state. In other words, it is sufficient to have at least a function of reliably adsorbing and supporting the preheated resin tablet and a function of transporting the preheated resin tablet. Therefore, the above-mentioned function for locking the preheated resin tablet at a predetermined position is not necessarily required. , preheated resin tablet 1
1 is suction-supported by the suction support means 4, for example, if a plurality of preheated resin tablets are suctioned to the suction cup 41 of the suction support means 4, or because the suction posture is poor, the supply into the bot 6 may be It is necessary to prevent harmful effects such as inhibiting the action. In order to prevent such adverse effects, the following configuration may be adopted.

That is, the preheated resin tablet conveyance and supply device shown in FIG. and a conveyance means (not shown) for the preheated resin tablet 11 suction-supported by the suction support means 4.

In this case, the above-mentioned fixed guide means 7 is the suction cup 4! of the suction support means 4! It is properly fixed to the mounting plate 42 of. Further, the fixed guide means is constituted by, for example, a plurality of guide pins 71 as shown in the same figure, and the guide pins are arranged at a virtual position on the outer periphery of the suction cup 41 and approximately equidistant from the center thereof. The guide pins may be arranged at equal intervals on the circumferential line, and furthermore, the space formed by each guide pin is set to be slightly wider than the outer shape of the preheated resin tablet 11, Therefore, the space is provided so that one preheated resin tablet 11 can be accommodated therein.

In this embodiment as well, the preheated resin tablets 11 are sequentially arranged at predetermined positions, for example, in the above-mentioned alignment step.
can be efficiently and reliably adsorbed and supported. That is, the suction support means 4 is lowered from above the preheated resin tablet 11, and the preheated resin tablet is inserted into the space constituting the fixed guide means (pin 71).
The upper surface of this preheated resin tablet may be suction-supported by the suction cup 4I. At this time, even if the center of the preheated resin tablet 11 and the center of the suction cup 41 do not match, the mold bot (6 ) is set so that its inner diameter is larger than the space constituting the fixed guide means, there will be no problem, and the space is provided so that one preheated resin tablet 1□ can be accommodated. Therefore, a plurality of preheated resin tablets are not attracted to the suction cup 41, and furthermore, the space is filled with the preheated resin tablet 11.
Since the space is set to be slightly wider than the external shape of the preheated resin tablet 1. At the time of the deposit,
A guiding action for guiding the preheated resin tablet toward the center of the suction support means 4 and an action for correcting its posture can be performed simultaneously.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be arbitrarily and appropriately modified and selected as necessary without departing from the spirit of the present invention. .

〔Effect of the invention〕

According to the present invention, even if the resin tablet is in a softened state due to preheating, the preheated resin tablet can be efficiently and reliably transported and supplied, thereby solving the conventional problems described above. This provides an excellent effect in that it is possible to provide a method for transporting and supplying preheated resin tablets and a transport and supply device thereof that can reliably solve the problem.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention.
) is a schematic plan view showing the preheating process of the resin tablet, FIG. FIG. 2 is a schematic front view and a partially cutaway longitudinal sectional view showing a process and a feeding process into a mold pot. FIG. 2 is an explanatory view corresponding to FIG.
) is a front view showing the preheating step corresponding to FIG. 1(1), FIG. 1(2) is a plan view showing the locking step and its suction support step corresponding to FIG. ) is a plan view showing the conveyance process corresponding to FIG. 1(3). FIG. 3 is a schematic plan view showing a configuration example of another preheated resin tablet locking means. FIG. 4 is a schematic plan view showing another example of the structure of the preheated resin tablet locking means. FIG. 5 is a partially cutaway front view showing another embodiment of the present invention. [Explanation of symbols] 1... Resin tablet 11... Preheating resin tablet 2... High frequency preheater 3... Locking means 31... Locking pin 32... Circumferential locking portion 4 ... Suction support means 41 ... Suction cup 42 ... Mounting plate 6 ... Mold pot 7 ... Fixed guide means 71 ... Guide pin

Claims (7)

[Claims] (1) A method for transporting and supplying preheated resin tablets, which comprises transporting and supplying preheated resin tablets in a state where the preheated resin tablets are supported by suction. (2) A method for transporting and supplying preheated resin tablets, which comprises locking the preheated resin tablets with a required locking member, and transporting the preheated resin tablets by suction and support. (3) A preheated resin tablet locking means that locks a preheated resin tablet at a predetermined position, a preheated resin tablet suction support means that suction supports a preheated resin tablet at a predetermined position, and the locking means and suction support means. 1. A conveyance and supply device for preheated resin tablets, comprising a means for conveying preheated resin tablets that is held and supported by suction. (4) The locking means of the preheated resin tablet is provided to engage with the peripheral surface of the preheated resin tablet, and the suction support means of the preheated resin tablet is provided to engage with the peripheral surface of the preheated resin tablet. The conveying and supplying device for preheated resin tablets according to claim 3, characterized in that the device is provided so as to be adsorbed to the preheated resin tablet. (5) The preheated resin tablet according to claim (3) or claim (4), wherein the locking means for the preheated resin tablet is comprised of a required plurality of locking pins. Conveyance supply device. (6) Claim (3) characterized in that the locking means for the preheated resin tablet includes a peripheral surface locking portion formed in a shape that joins to the peripheral surface portion of the preheated resin tablet.
, or the preheated resin tablet conveyance and supply device according to claim (4). (7) a preheated resin tablet suction support means for suctioning and supporting the preheated resin tablet; a preheated resin tablet fixing guide means disposed at an outer peripheral position of the suction support means;
A conveying and supplying device for preheated resin tablets, comprising a means for conveying preheated resin tablets that are suction-supported by the suction support means.