JP2023025549A - Resin molding device and method for manufacturing resin molded product - Google Patents

Abstract

To provide a resin molding device that has the function to wind a coating material around a resin material.SOLUTION: A resin molding device has a coating material winding mechanism 8 that winds a coating material 7 around the outer circumference of a resin material J, and a resin molding mechanism 10 that performs resin molding using the resin material J with the coating material 7 wound around it. The coating material winding mechanism 8 has a resin housing section 881 that houses the resin material J and a feed-out mechanism 83 that sends the coating material 7 into the resin housing section 81.SELECTED DRAWING: Figure 8

Description

The present invention relates to a resin molding apparatus and a method of manufacturing a resin molded product.

As a resin molding method for performing resin molding using a resin material, there is a method in which a resin material contained in a pot of a molding die is pushed out into a cavity of the molding die by a plunger, thereby encapsulating an object to be molded.

Here, the resin material accommodated in the pot generates resin dust during transportation or attachment to the pot. This resin dust not only adversely affects sealing equipment, but also requires cleaning work. For this reason, the resin pellets shown in Patent Document 1 have been considered as means for preventing dust generated from resin materials. These resin pellets are coated with a dust-preventing film made of starch or wax to suppress the generation of resin dust.

JP-A-11-291242

However, when the resin material in the pot is pushed out into the cavity by the plunger, the molten resin material enters the sliding portion between the inner surface of the pot and the plunger, resulting in the generation of resin residue.

To solve this problem, the inventors of the present application have found that by placing a cover surrounding the resin material between the inner surface of the pot and the resin material, the melted resin material is prevented from entering the sliding portion between the inner surface of the pot and the plunger. We are thinking of making it more difficult to reduce the amount of resin residue.

Then, as a configuration in which a cover surrounding the resin material is arranged between the inner surface of the pot and the resin material, the cover is wound around the resin material before being accommodated in the pot, and the resin material with the cover wound is placed in the pot. I am thinking of accommodating the

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to realize a specific structure for arranging a cover surrounding a resin material between the inner surface of a pot and the resin material. The main subject is to provide the automatic winding function.

That is, the resin molding apparatus according to the present invention includes a coating winding mechanism for winding a coating on the outer circumferential surface of a resin material, and a resin molding mechanism for resin-molding the resin material with the coating wound thereon. In addition, the covering body winding mechanism has a resin containing section for containing the resin material, and a delivery mechanism for feeding the covering body to the resin containing section.

According to the present invention configured as described above, the function of automatically winding the covering around the resin material can be imparted in the resin molding apparatus.

It is a sectional view showing typically composition of a resin molding mechanism of a resin molding device concerning one embodiment of the present invention. It is a schematic diagram which shows an example of the covering which surrounds the resin material of the same embodiment. It is a functional block diagram of the resin molding apparatus of the same embodiment. It is a perspective view which shows typically the structure of the covering winding mechanism of the same embodiment. It is a top view which shows typically the structure of the covering winding mechanism of the same embodiment. 3A and 3B are cross-sectional views schematically showing (a) a state in which the covering body is being delivered to the resin containing section and (b) a state in which the covering body has been completed to be discharged to the resin containing section in the same embodiment; It is a perspective view which shows typically operation|movement of the covering winding mechanism of the same embodiment. It is a perspective view which shows typically the structure of the resin material conveyance mechanism of the same embodiment. It is a sectional view showing typically composition of an opening of an accommodation part of the 1st transportation part of the embodiment, and a 2nd transportation part. Fig. 6(a) is a cross-sectional view seen from the arrow A in Fig. 6(d), and (b) is an arrow in Fig. 6(d) before the resin material is contained in the pot, which schematically shows the configuration of the conveying and containing part of the same embodiment. FIG. 3B is a cross-sectional view as seen from B; FIG. 6(a) Cross-sectional view from arrow A in FIG. 6(d), (b) Arrow in FIG. FIG. 3B is a cross-sectional view as seen from B; It is a figure for demonstrating the manufacturing method of the resin molding of the same embodiment. It is a figure for demonstrating the manufacturing method of the resin molding of the same embodiment.

The invention will now be described in more detail by means of examples. However, the invention is not limited by the following description.

As described above, the resin molding apparatus of the present invention includes a coating winding mechanism that winds a coating around the outer circumferential surface of a resin material, and a resin molding mechanism that performs resin molding using the resin material with the coating wound. , wherein the coating winding mechanism includes a resin containing portion that contains the resin material, and a delivery mechanism that feeds the coating into the resin containing portion.

Since this resin molding apparatus is provided with the covering winding mechanism for winding the covering around the outer circumferential surface of the resin material, it is possible to provide the resin molding apparatus with a function of automatically winding the covering around the resin material. , resin molding can be performed using a resin material in a state in which the covering is wound. As a result, a cover surrounding the resin material is arranged between the inner surface of the pot and the resin material during resin molding, so that the resin material can be prevented from touching the inner surface of the pot, and the resin adheres to the inner surface of the pot. Waste can be reduced. In addition, since the resin material is surrounded by the cover, even if it is a high-flow resin such as mold underfill (MUF) resin or clear resin, it will melt at the sliding portion between the inner surface of the pot and the plunger. It becomes difficult for the resin material to enter, and resin scum generated by the resin material entering the sliding portion can be reduced. By reducing the resin residue in this way, contamination to the next resin molding can be reduced, and the quality of the resin molded product can be improved. In addition, it is possible to prevent facility troubles caused by resin residue and reduce the frequency of cleaning work. Furthermore, the use of the covering can prevent an increase in the sliding resistance of the plunger, so that the quality of the resin molded product can be stabilized and the life of the pot and the plunger can be extended.

As a specific embodiment for delivering the coating to the resin containing portion, the coating winding mechanism has a slit-shaped opening that communicates with the resin containing portion, and the feeding mechanism includes the opening. It is desirable that the cover is sent out from the housing to the resin container.

In order to automatically deliver a coating of a desired length to the resin containing portion, the delivery mechanism includes a fixing portion for fixing the coating outside the resin containing portion, and the fixing portion fixed by the fixing portion. It is desirable to have a cutting portion for cutting the covering, and feed the cut covering from the cutting portion to the resin accommodating portion.

The cover has a sheet-like shape, and the width of the cover is such that it can cover the entire outer circumferential surface of the resin material in the axial direction. The length dimension of the body is desirably a dimension that allows one or more turns of the outer circumferential surface of the resin material.
With this configuration, the entire outer peripheral surface of the resin material can be covered with the covering, and resin scum adhering to the inner surface of the pot can be further reduced.

As a specific embodiment of the delivery mechanism, it is desirable that the delivery mechanism has a roller for delivering the covering.

The delivery mechanism has two rollers that are provided separately along a predetermined delivery direction and that deliver the covering, and the fixing part and the cutting part are provided between the two rollers. desirable.
With this configuration, one roller can reliably feed the covering to the fixing portion and the cutting portion, and the other roller can reliably feed the cut covering to the resin accommodating portion.

Moreover, it is preferable that the resin molding apparatus of the present invention further include a transport mechanism that transports the resin material with the covering wound thereon to the resin molding mechanism.
With this configuration, it is possible to automatically perform from the covering winding operation by the covering winding mechanism to the resin molding operation by the resin molding mechanism.

The covering body winding mechanism has a push section that pushes out the resin material with the covering body wound thereon to the resin material conveying mechanism and transfers it to the resin material conveying mechanism. It is desirable to form an escape for avoidance.
With this configuration, both the resin material and the cover can be reliably pushed out by the push portion and transferred to the resin material transport mechanism.

In a configuration in which a relief portion is formed in the resin containing portion, in order that the relief groove does not hinder the movement of the coating when the coating is wound around the resin material, the inner surface of the relief portion is provided with a groove for the movement of the coating. It is desirable that a guide surface is formed to guide the covering with respect to the direction.

Furthermore, a method for manufacturing a resin molded product using the resin molding apparatus described above is also an aspect of the present invention.

<One embodiment of the present invention>
An embodiment of a resin molding apparatus according to the present invention will be described below with reference to the drawings. It should be noted that all of the drawings shown below are schematically drawn with appropriate omissions or exaggerations for the sake of clarity. The same components are given the same reference numerals, and the description thereof is omitted as appropriate.

<Basic Configuration of Resin Molding Apparatus 100>
The resin molding apparatus 100 according to the present embodiment molds a molding object W to which an electronic component Wx is connected by transfer molding using a resin material J. As shown in FIG.

Here, the molding object W is, for example, a metal board, a resin board, a glass board, a ceramic board, a circuit board, a semiconductor board, a wiring board, a lead frame, or the like, with or without wiring. The resin material J for resin molding is, for example, a composite material containing a thermosetting resin, and the form of the resin material J is, for example, a columnar tablet-like solid. The electronic component Wx connected to the upper surface of the molding object W is, for example, an electronic element such as a bare chip, a resistance element, a capacitor element, or at least one of these electronic elements sealed with resin.

Specifically, as shown in FIG. 1, the resin molding apparatus 100 includes a resin molding mechanism 10 that performs resin molding using a resin material J. The resin molding mechanism 10 includes a pot 21 that stores the resin material J. One molding die 2 (hereinafter referred to as the lower mold 2) formed and the other molding die 3 (hereinafter referred to as the upper mold 2) provided opposite to the lower mold 2 and having a cavity 31 into which the resin material J is injected. and a mold clamping mechanism (not shown) for clamping the lower mold 2 and the upper mold 3 . The lower mold 2 is provided via a lower mold holding member 4 on a movable platen (not shown) that is moved up and down by a mold clamping mechanism. The upper die 3 is provided on an upper stationary platen (not shown) via an upper die holding member (not shown). Note that the lower mold holding member 4 has, for example, a heater plate, a heat insulating plate, and the like.

For example, a plurality of pots 21 are formed in the lower mold 2 so as to open on the upper surface of the lower mold 2 . The pot 21 is constituted by a through hole 2H formed in the lower mold 2. The through hole 2H is formed by fitting the cylindrical pot member 20 made of, for example, cemented carbide or steel into the lower mold 2. formed by The pot 21 has a shape corresponding to the shape of the resin material J. In this embodiment, since the resin material J is cylindrical, the pot 21 also has a circular cross-sectional shape corresponding to it. In addition, the upper surface of the lower mold 2 is formed with a mounting portion 22 to which the molding object W is mounted.

A cavity 31 is formed on the lower surface (mold surface) of the upper mold 3 to accommodate the electronic component Wx of the molding object W mounted on the mounting portion 22 of the lower mold 2 . Further, on the lower surface of the upper mold 3, a cull portion 32, which is a concave portion, is formed in a portion facing the pot 21 of the lower mold 2, and a runner portion 33 is formed to connect the cull portion 32 and the cavity 31. ing.

The resin molding mechanism 10 includes a plunger unit 5 having a plurality of plungers 51 for pushing out the resin material J accommodated in a plurality of pots 21 of the lower mold 2, and a plunger unit 5 so that the plungers 51 move back and forth within the pots 21. and a drive mechanism 6 for moving 5 .

The plunger unit 5 is provided below the lower mold 2 , and the plunger 51 is inserted into the through hole 2H of the lower mold 2 . The top surface of the plunger 51 constitutes the bottom surface of the pot 21 of the lower mold 2 . The plunger 51 presses the resin material J heated and melted in the pot 21 from the pot 21 toward the upper die 3 .

The drive mechanism 6 moves the plunger unit 5 relative to the lower die 2 , whereby the plunger 51 advances and retreats (moves up and down) within the pot 21 . The drive mechanism 6 of the present embodiment is provided on the opposite side of the plunger unit 5 to the lower die 2 (under the plunger unit 5). Here, as the drive mechanism 6, for example, a combination of a servomotor and a ball screw mechanism, or a combination of an air cylinder or a hydraulic cylinder and a rod can be used.

When the plunger unit 5 is lifted while the lower mold 2 and the upper mold 3 are clamped by the mold clamping mechanism, the resin material J melted by the heat of a heater (not shown) provided in the resin molding mechanism 10 is injected into the cavity. 31 is injected. As a result, the electronic component Wx of the molding object W accommodated in the cavity 31 is resin-sealed.

<Characteristic part of the method for manufacturing the resin molded product P>
Next, a characteristic part of the method for manufacturing the resin molded article P using the resin molding apparatus 100 will be described.

As shown in FIG. 1, when the resin material J is accommodated in the pot 21 of the lower mold 2, a coating is provided between the inner surface of the pot 21 and the resin material J so that the resin material J does not come into contact with the inner surface of the pot 21. Place the body 7.

The cover 7 surrounds the entire periphery of the resin material J while opening the direction in which the resin material J is extruded in the pot 21 . Specifically, the cover 7 surrounds the entire outer peripheral surface of the resin material J without covering the upper surface of the resin material J in the pot 21 .

This cover 7 is a consumable material that is discarded for each resin molding, and examples thereof include those made of paper, resin, cellulose, woven fabric, non-woven fabric, or composites thereof. can be done. The composite material includes a resin film containing a filler, paper laminated with a resin film such as a heat-resistant film having a thickness of 10 μm or less, paper coated with resin, and paper impregnated with resin. , paper made by mixing pulp and resin fibers. These covers 7 are made of a material that does not melt or thermally decompose at a molding temperature (for example, about 170° C.) for resin sealing with the resin material J. As shown in FIG.

Specifically, as shown in FIG. 2, the cover 7 is, for example, a rectangular sheet, and is arranged in the pot 21 while being wound around the outer peripheral surface of the resin material J. As shown in FIG. Here, as shown in the developed view of FIG. 2(d), the width dimension L1 of the covering 7 is a dimension that covers the entire axial direction of the outer peripheral surface of the resin material J, and the length dimension L2 of the covering 7 is a dimension that allows one or more turns around the outer peripheral surface of the resin material J. For example, the width dimension L1 of the covering 7 is about 0.5 to 3 mm longer than the width dimension of the resin material J, and the length dimension L2 of the covering 7 is 1 when the outer circumference of the resin material J is taken as one circumference. .1 to 1.5 rounds. By winding the sheet-like covering 7 around the resin material J in this way, the construction of the covering 7 can be simplified, and the processing cost can be reduced.

The thickness of the cover 7 is larger than the clearance (gap) between the inner surface of the pot 21 and the plunger 51, so that the cover 7 itself does not enter the inner surface of the pot 21, the plunger 51 and the sliding portion. there is For example, the thickness of the cover 7 is 50 μm when the clearance is 10 μm.

The cover 7 is configured to be in close contact with the inner surface of the pot 21 . Specifically, the cover 7 is configured to adhere to the inner surface of the pot 21 by the internal pressure applied from the resin material J melted or softened in the pot 21 . In this embodiment, the covering 7 is wrapped around the resin material J and is not constrained in the circumferential direction. It is a condition that can occur. As a result, the cover 7 is easily expanded in the radial direction by the internal pressure applied from the melted or softened resin material J, and is easily brought into close contact with the inner surface of the pot 21 . The internal pressure applied from the melted or softened resin material J mainly means that the melted or softened resin material J is pushed by the plunger 51 and spreads in the circumferential direction, or melted or softened. This is the pressure generated by the resin material J being pushed by the plunger 51 and the cull portion 32 of the upper mold 3 and spreading in the circumferential direction.

Since the cover 7 is in close contact with the inner surface of the pot 21 in this manner, the cover 7 closes the sliding portion between the inner surface of the pot 21 and the plunger 51, and the molten resin material J prevents the sliding portion from sliding. makes it more difficult to invade. In addition, since the cover 7 is in close contact with the inner surface of the pot 21 due to the internal pressure applied from the resin material J melted or softened in the pot 21, when the cover 7 is arranged in the pot 21, the inner surface of the pot 21 is It is not necessary to bring the cover 7 into close contact with the pot 21, and the cover 7 can be easily arranged in the pot 21.例文帳に追加

<Structure for automating the manufacturing method of the resin molded product P>
As a configuration for automating the manufacturing method of the resin molded product P described above, the resin molding apparatus 100 of the present embodiment includes a covering body 7 wound around the outer peripheral surface of the resin material J, as shown in FIGS. A winding mechanism 8 and a resin material conveying mechanism 9 for conveying the resin material J with the covering 7 wound thereon to the resin molding mechanism 10 are further provided. Resin molding is performed using the resin material J in the state. As shown in FIG. 3, the coating winding mechanism 8, the resin material conveying mechanism 9, and the resin molding mechanism 10 are controlled by the controller COM.

<Cover winding mechanism 8>
As shown in FIGS. 4 to 6, the coating winding mechanism 8 feeds the coating 7 from one side in the circumferential direction of the cylindrical resin material J so that the coating 7 is applied to the outer peripheral surface of the resin material J. It is the one that winds up. Hereinafter, the resin material J in a state in which the outer peripheral surface is wrapped with the coating 7 is referred to as a "coated resin material J".

Specifically, the cover winding mechanism 8 has a cover winding jig 80 and a push section 84, as shown in FIGS. The coating winding jig 80 includes a resin containing portion 81 containing the resin material J, a slit-shaped opening 82 communicating with the resin containing portion 81 , and the coating 7 from the opening 82 to the resin containing portion 81 . and a delivery mechanism 83 for delivery.

The resin containing portion 81 and the slit-shaped opening 82 are formed in the cover winding jig 80 . Here, the resin accommodating part 81 accommodates the resin material J in a position (sideways state) in which the central axis of the resin material J is along the horizontal direction, and has an approximately cylindrical accommodation space. A slit-shaped opening 82 is formed in the upper portion of the resin containing portion 81 , is connected to the upper portion of the resin containing portion 81 , and opens to the upper surface of the coating winding jig 80 . The width dimension of this opening 82 is larger than the width dimension of the cover 7 .

Further, a linear guide groove (concave groove) 80M is formed on the upper surface of the cover winding jig 80 so as to extend along a predetermined feed-out direction SD and guide the cover 7 to the opening 82. . As shown in FIGS. 4 and 5, the covering winding jig 80 is connected to a feed base 85 for feeding the covering 7 to the covering winding jig 80. As shown in FIGS. The feed base 85 is also formed with a linear guide groove (concave groove) 85M for guiding the coating 7 to the coating winding jig 80. As shown in FIG.

As shown in FIGS. 4, 5 and 7, the delivery mechanism 83 includes a fixing portion 831 for fixing the covering 7 outside the resin containing portion 81, and a cutting portion for cutting the covering 7 fixed by the fixing portion 831. 832 , and feeds the cover 7 cut by the cutting part 832 to the resin accommodating part 81 .

The fixing portion 831 fixes the covering 7 when the cutting portion 832 cuts the covering 7 . Specifically, the fixing part 831 fixes the cover 7 by sucking, and includes a suction hole 831a that opens on the upper surface of the cover winding jig 80, and a vacuum pump or vacuum pump that sucks air from the suction hole 831a. It has a suction mechanism (not shown) such as a vacuum ejector. In addition, as shown in FIGS. 4 and 5, the fixing portion 831 of the present embodiment fixes the cover 7 on both sides of the cutting position CP by the cutting portion 832. The suction holes 831a are the cutting portion It is provided on both sides of the cutting position CP by 832 .

The cutting part 832 cuts the cover 7 fixed by the fixing part 831, and moves in the width direction of the cover 7 (the direction orthogonal to the feeding direction SD of the cover 7 on the horizontal plane) to cut the cover. 7 is cut (see FIG. 7(c)). Specifically, the cutting section 832 has a cutting blade 832a for cutting the covering 7 and a moving mechanism (not shown) for moving the cutting blade 832a back and forth. The position through which the cutting blade 832a passes by this moving mechanism becomes the cutting position CP. Moreover, in the covering body winding jig 80, a slit 80S is formed at the cutting position CP through which the cutting blade 832a passes. The length of the covering body 7 cut by the cutting portion 832 is such that the outer peripheral surface of the resin material J can be wound more than once. The covering 7 may be cut by vertically moving the cutting blade 832a with respect to the covering 7 .

4, 5 and 7, the delivery mechanism 83 has two rollers 833 and 834 which are provided apart along a predetermined delivery direction SD to deliver the cover 7. As shown in FIGS. A fixing portion 831 and a cutting portion 832 are provided between these two rollers 833 and 834 . In the following description of the two rollers 833 and 834 , the roller located on the rear side in the delivery direction SD is the insertion side roller 833 , and the roller located on the front side in the delivery direction SD is the winding section side roller 834 .

The insertion side roller 833 sends out the cover 7 to the fixing part 831 and the cutting part 832, and sends out the cover 7 until the tip of the sent out cover 7 reaches the winding part side roller 834 (Fig. 7 ( b) see). Further, the winding section side roller 834 inserts the covering 7 cut by the cutting section 832 from the opening 82 and sends it out to the resin accommodating section 81 (see FIGS. 6A and 7D). . Both the insertion-side roller 833 and the winding-side roller 834 are rotated by a drive unit (not shown) such as a motor.

As shown in FIG. 6, the covering body 7 delivered to the resin containing portion 81 by the winding portion side roller 834 advances inside the resin containing portion 81 by one round or more while being deformed along the inner peripheral surface of the resin containing portion 81 . and become cylindrical. When the resin material J is stored in advance in the resin containing portion 81, the cover 7 advances between the inner peripheral surface of the resin containing portion 81 and the outer peripheral surface of the resin material J, and the resin material J One or more rolls of the covering 7 are wound around the outer peripheral surface, and the resin material J is wrapped with the covering 7 (see FIG. 6B).

4, 5 and 7, the covering body winding mechanism 8 has a push part 84 for pushing out the covered resin material J to the conveying mechanism 9 and transferring it. The push portion 84 pushes the coated resin material J lying sideways in the resin containing portion 81 along the central axis direction, thereby delivering it to the conveying mechanism 9 . Specifically, as shown in FIGS. 4 and 5, the push section 84 has a push member 841 that pushes out both the resin material J and the cover 7, and a drive section 842 that moves the push member 841 back and forth. there is As the drive unit 842, for example, a combination of a servomotor and a ball screw mechanism, or a combination of an air cylinder or a hydraulic cylinder and a rod can be used.

The push member 841 has a shape capable of pushing out both the resin material J and the cover 7 without interfering with the resin containing portion 81, and has, for example, a flat plate shape (see FIG. 4).

Here, as shown in FIG. 6, the resin containing portion 81 is formed with a relief portion 81a for avoiding interference with the push member 841. As shown in FIG. The relief portion 81 a is formed on the inner peripheral surface of the resin accommodating portion 81 along the moving direction of the push member 841 . In addition, on the inner surface of the escape portion 81a, the covering body 7 is provided with a thickness relative to the traveling direction of the covering body 7 so as not to interfere with the movement of the covering body 7 through the opening 82 and the resin accommodating part 81. A guide surface 81x (leading tapered surface 81x) for guiding the is formed. In FIG. 6, the guide surface 81x has a planar shape formed so as to approach the resin material J in the advancing direction of the cover 7, but the resin material J increases in the advancing direction of the cover 7. A curved surface formed to approach J may be used.

<Resin Material Conveying Mechanism 9>
The resin material conveying mechanism 9 conveys the coated resin material J to the resin molding mechanism 10 and stores the coated resin material J in the pot 21 of the lower mold 2, as shown in FIG.

As shown in FIG. 8, the resin material conveying mechanism 9 of the present embodiment includes a first conveying section 91 that receives the coated resin material J from the covering body winding mechanism 8, and a first conveying section 91 that conveys the coated resin material J. It has a second conveying portion 92 for receiving, and a conveying/accommodating portion 93 for receiving the coated resin material J from the second conveying portion 92 and accommodating it in the pot 21 .

In FIG. 8, (a) shows the delivery state from the covering winding mechanism 8 to the first transport section 91, and (b) shows the delivery state from the first transport section 91 to the second transport section 92. (c) shows the transfer state from the second transfer section 92 to the transfer housing section 93 , and (d) shows the transfer state from the transfer housing section 93 to the pot 21 .

The first conveying unit 91 conveys the coated resin material J from the covering winding mechanism 8 to the second conveying unit 92, and has one or more storage units 91a for storing the coated resin material J. there is Since the resin material J is columnar, the accommodation portion 91a is an accommodation space having a circular cross-section corresponding to the columnar shape. The accommodation portion 91 a is formed in the first accommodation member 911 . As shown in FIG. 9 , the accommodating portions 91 a of the first conveying portion 91 are formed so as to open on surfaces facing each other in the first accommodating member 911 . Then, with the first accommodating member 911 positioned to the side of the covering winding mechanism 8 (see FIG. 8A), the covered resin material J is introduced through an opening formed on one surface. Also, the first housing member 911 is moved to the transfer position to the second transport section 92 by a moving mechanism (not shown) (see FIG. 8(b)), and in this state, the covering is completed through the opening formed on the other surface. Resin material J is taken out.

Here, as shown in FIG. 9, in the accommodating portion 91a of the first conveying portion 91, the inner diameter of the opening, which is the end portion of the accommodating portion 91a on the side into which the coated resin material J is put, increases toward the opening side. It is designed to grow with you. Here, a tapered surface 91b is formed in the opening. With this configuration, the cover 7 is less likely to get caught in the opening when the resin material J that has been covered is accommodated, so that the resin material J can be accommodated smoothly in the accommodation portion 91a. In addition, it is possible to prevent the edge of the cover 7 from being bent and causing the outer peripheral surface of the resin material J to be uncovered.

In addition, as shown in FIG. 8(b), the first conveying portion 91 has a push portion 912 that pushes out the coated resin material J from the accommodating portion 91a of the first accommodating member 911 to the second conveying portion 92 and delivers it. are doing. This push part 912 delivers the coated resin material J to the second conveying part 92 by pushing it out along the central axis direction. Specifically, the push section 912 has a push member 912a that pushes out both the resin material J and the cover 7, and a driving section (not shown) that moves the push member 912a back and forth. The push member 912a has a shape capable of pushing out both the resin material J and the cover 7, and has, for example, a flat plate shape. Further, the first housing member 911 is formed with a slit 911S through which both the resin material J and the cover 7 can be pushed out by the flat push member 912a. In addition, a plurality of coated resin materials J are collectively transferred to the second conveying section 92 by the push member 912a.

As shown in FIG. 8, the second conveying unit 92 conveys the coated resin material J from the first conveying unit 91 to the conveying container 93. Like the first conveying unit 91, the coated resin material J It has one or a plurality of housings 92a (see FIG. 9) for housing J. Since the resin material J is columnar, the accommodation portion 92a is an accommodation space having a circular cross section corresponding to the columnar shape. The accommodating portion 92 a is formed in the second accommodating member 921 . The accommodating portion 92 a of the second conveying portion 92 allows the coated resin material J to be taken in and out from an opening formed on one surface of the second accommodating member 921 .

Here, as shown in FIG. 9, in the accommodating portion 92a of the second conveying portion 92, the inner diameter of the opening, which is the end portion of the accommodating portion 92a on the side where the coated resin material J is put, increases toward the opening side. It is designed to grow with you. Here, a tapered surface 92b is formed in the opening. With this configuration, the cover 7 is less likely to get caught in the opening when the resin material J that has been covered is accommodated, and can be smoothly accommodated in the accommodation portion 92a. In addition, it is possible to prevent the edge of the cover 7 from being bent and causing the outer peripheral surface of the resin material J to be uncovered.

Further, the second conveying portion 92 has a push portion 922 that pushes out the coated resin material J from the accommodating portion 92 a of the second accommodating member 921 to the second conveying portion 92 and transfers it. The push part 922 delivers the coated resin material J to the transport/accommodation part 93 by pushing it upward along the central axis direction. Here, the transport housing portion 93 is provided above the second transport portion 92, and the second transport portion 92 receives the resin material J from the first transport portion 91 in a horizontal state (see FIG. 8B). , and delivers the resin material J to the transfer container 93 in a standing state rotated by 90 degrees (see FIG. 8(c)). The rotation of the second conveying unit 92 can be performed by a driving unit (not shown) such as a motor.

Specifically, the push portion 922 has a push member 922a that pushes out both the resin material J and the cover 7, and a drive portion 922b that moves the push member 922a back and forth. The push member 922a has a shape capable of pushing out both the resin material J and the cover 7, and has, for example, a flat plate shape. Further, the second housing member 921 is formed with a slit (not shown) capable of pushing out both the resin material J and the cover 7 by a flat push member 922a, similarly to the first housing member 911. there is In addition, a plurality of coated resin materials J are collectively transferred to the conveying/accommodating section 93 by the pushing member 922a.

As shown in FIG. 8, the conveying/receiving unit 93 conveys and puts the coated resin material J from the second conveying unit 92 into the pot 21. As with the first conveying unit 91, the coated resin material J is placed in the pot 21. It has one or a plurality of housing portions 93a (see FIGS. 10 and 11) for housing J. Since the resin material J is columnar, the accommodation portion 93a is an accommodation space having a circular cross section corresponding to the columnar shape. The accommodation portion 93 a is formed in the third accommodation member 931 . The covered resin material J is taken in and out from an opening formed in the lower surface of the third accommodation member 931 in the accommodation portion 93 a of the transport accommodation portion 93 . 10(b) and 11(b), the third housing member 931 temporarily holds the cover 7 and the resin material J housed in the housing portion 93a so as not to fall. A retention shutter 932 is provided. The holding shutter 932 may be provided at any position as long as it can hold the cover 7 and the resin material J with respect to the housing portion 93a. Further, the third housing member 931 is moved to a delivery position to the pot 21 (here, a position where the housing portion 93a and the pot 21 are vertically aligned) by a moving mechanism (not shown) (FIGS. 8D, 10, and 11). reference).

Here, as shown in FIGS. 10 and 11, in the storage section 93a of the transport storage section 93, the inner diameter of the opening, which is the end of the storage section 93a on the side into which the coated resin material J is pushed, is the same as the opening side. It is designed to grow as you go. Here, a tapered surface 93b is formed in the opening. With this configuration, the covering member 7 is less likely to get caught in the opening when the resin material J that has been covered is accommodated, and can be smoothly accommodated in the accommodation portion 93a. In addition, it is possible to prevent the edge of the cover 7 from being bent and causing the outer peripheral surface of the resin material J to be uncovered.

Further, the conveying/accommodating portion 93 has a push portion 933 for pushing out and delivering the coated resin material J from the accommodating portion 93 a of the third accommodating member 931 to the pot 21 . The push part 933 is for putting the coated resin material J into the pot 21 by pushing it downward along the central axis direction. In other words, the resin material J is taken in and out from the opening portion of the accommodating portion 93a which is configured to increase in size toward the opening side. Here, the storage portion 93a of the transport storage portion 93 is positioned above the pot 21, and both the cover 7 and the resin material J are pushed downward by the push portion 933 to store the covered resin material J in the pot 21. . When the resin material J that has been coated is stored in the pot 21 by the push portion 933, the holding shutter 932 is opened (see FIG. 11(b)). In FIG. 11B, the holding shutter 932 moves in a direction orthogonal to the arrangement direction of the pots 21 (or the housing portion 93a). ) may be used.

Specifically, the push portion 933 has a push member 933a that pushes out both the resin material J and the cover 7, and a driving portion (not shown) that moves the push member 933a back and forth. The push member 933a has a shape capable of pushing out both the resin material J and the cover 7, and has, for example, a flat plate shape. More specifically, the push member 933a has push ends 933a1 in the form of flat plates separated for each pot 21, and has a shape in which the upper portions of a plurality of push ends 933a1 are connected to each other. Both the material J and the covering 7 can be extruded. Further, the third housing member 931 is formed with a slit 933s (see FIGS. 10 and 11) through which both the resin material J and the cover 7 can be pushed out by a flat push end 933a1. Also, a plurality of coated resin materials J are collectively delivered to the pot 21 by the push member 933a.

10 and 11, a protruding portion 933a2 for pushing the resin material J is formed on the surface (lower surface) of the push end 933a1 that pushes the cover 7 and the resin material J. As shown in FIG. With this configuration, the cover 7 can be less likely to be damaged than when the surface (lower surface) of the push end portion 933a1 that presses the cover 7 and the resin material J is a flat surface. When the surface (lower surface) of the push end portion 933a1 that presses the cover 7 and the resin material J is flat, the shape of the push member 933a is simple, easy to design, and cost can be reduced.

<Overall Process of Manufacturing Method of Resin Molded Product P>
Next, an example of operation of the resin molding apparatus 100 will be described. In this embodiment, the operation of the resin molding apparatus 100, for example, the coating winding operation of the coating winding mechanism 8, the resin material conveying operation of the resin material conveying mechanism 9, the resin molding operation of the resin molding mechanism 10, etc. All operations and controls are performed by the control unit COM (see FIG. 3).

<Cover winding operation>
As shown in FIG. 7( a ), the cover 7 is fed along the guide groove 85 of the feed table 85 to the insertion side roller 833 provided on the cover winding jig 80 . As a result, the cover 7 is sandwiched between the upper surface of the cover winding jig 80 and the insertion side roller 833 .

Then, as shown in FIG. 7(b), the insertion side roller 833 is rotated to feed the cover 7 to the winding section side roller 834. Then, as shown in FIG. As a result, the tip of the cover 7 is sandwiched between the upper surface of the cover winding jig 80 and the winding part side roller 834 .

Next, as shown in FIG. 7( c ), the fixing portion 831 sucks the cover 7 to fix the cover 7 on the upper surface of the cover winding jig 80 . After fixing the cover 7 to the upper surface of the cover winding jig 80 , the cutting part 832 is advanced and retreated to cut the cover 7 . The length dimension of the cover 7 sandwiched between the winding part side rollers 834 by this cutting is a dimension that allows the outer peripheral surface of the resin material J to be wound one or more times.

After the covering 7 is cut by the cutting portion 832 , the adsorption of the covering 7 by the fixing portion 831 is released.

In parallel with each of the above operations, or before and after each of the above operations, the resin material J is accommodated in the resin accommodating portion 81 of the coating winding jig 80 by a resin material supply portion (not shown) (see FIG. 7 ( c) see).

Then, as shown in FIG. 7( d ), the winding portion side roller 834 is rotated to insert the cut covering 7 through the opening 82 and feed it into the resin accommodating portion 81 . As a result, the covering body 7 advances between the inner peripheral surface of the resin containing portion 81 and the outer peripheral surface of the resin material J (see FIG. 6A), and the covering body 7 spreads over the outer peripheral surface of the resin material J. is wound by one or more turns, and the resin material J is wrapped with the cover 7 (see FIG. 6(b)).

After the covering body 7 is wrapped around the resin material J, the pushing part 84 pushes the covering body 7 and the resin material J, as shown in FIG. Pass the material J (see FIG. 8(a)). When the first conveying section 91 has a plurality of storage sections 91a, the above operation is repeated to deliver the coated resin material J to the plurality of storage sections 91a.

<Conveyance operation>
After receiving the coated resin material J in the state shown in FIG. 8(a), the first conveying section 91 moves to the transfer position to the second conveying section 92 as shown in FIG. 8(b). At this transfer position, the storage section 91a of the first transport section 91 and the storage section 92a of the second transport section 92 face each other in the horizontal direction. Then, the pushing portion 912 of the first conveying portion 91 pushes out the coated resin material J accommodated in the accommodating portion 91 a in the horizontal direction and delivers it to the accommodating portion 92 a of the second conveying portion 92 .

Next, after receiving the coated resin material J, the second conveying unit 92 rotates 90 degrees to the upright state, as shown in FIG. 8(c). In this state, the accommodation portion 92a of the second transport portion 92 and the accommodation portion 93a of the transport accommodation portion 93 face each other in the vertical direction. Then, the push portion 922 of the second conveying portion 92 pushes the covered resin material J accommodated in the accommodating portion 92 a upward and delivers it to the accommodating portion 93 a of the conveying accommodating portion 93 . After receiving the covered resin material J in the storage part 93a, the transporting/accommodating part 93 closes the holding shutter 932 to hold the cover 7 and the resin material J so as not to fall.

After receiving and holding the coated resin material J, the conveying/accommodating part 93 moves to the position to put it into the pot 21, as shown in FIG. 8(d). At this insertion position, the storage portion 93a of the transport storage portion 93 and the pot 21 face each other in the vertical direction (see FIG. 10). Then, as the holding shutter 932 of the conveying/accommodating portion 93 opens, the pushing portion 933 of the conveying/accommodating portion 93 pushes out at least the covering body 7 out of the covered resin material J accommodated in the accommodating portion 93 a and accommodates it in the pot 21 . (See FIG. 11). In this embodiment, by pushing out both the cover 7 and the resin material J from the push portion 933 , the cover 7 can be pushed all the way into the pot 21 . In the present embodiment, the width L1 of the cover 7 is longer than the width of the resin material J by about 0.5 to 3 mm. can be put up to the bottom of the pot 21. By the series of operations described above, the coated resin material J is accommodated in the pot 21 .

<Resin molding operation>
By the above operation, the resin material J and the coating 7 are accommodated in the pot 21, and as shown in FIG. A molding object W is attached to 22 .

Then, as shown in FIG. 12(b), the upper mold 3 and the lower mold 2 are clamped to sandwich the molding object W between the upper mold 3 and the lower mold 2. As shown in FIG. At this time, the electronic component Wx of the molding object W is housed in the cavity 31 of the upper mold 3 .

Then, the resin material J melted in the pot 21 is pushed out by the plunger 51 . Thereby, as shown in FIG. 12(c), the molten resin material J passes through the cull portion 32 and the runner portion 33 of the upper mold 3 and is introduced into the cavity 31. As shown in FIG.

Then, as shown in FIG. 13A, by heating the melted resin material J for a time required for curing, the resin material J is cured to form a cured resin. As a result, the electronic component Wx in the cavity 31 and the substrate around it are sealed in a cured resin (sealing resin) that is shaped to correspond to the shape of the cavity 31 .

Next, after the time required for curing has passed, the upper mold 3 and the lower mold 2 are opened to remove the sealed substrate (resin molded product P), as shown in FIG. 13(b). It is released from the mold together with the resin J1 and transported integrally. Here, the unnecessary resin J1 is composed of resin remaining in the cull portion 32 (cull J11) and resin remaining in the runner portion 33 (runner J12). Thereafter, the unnecessary resin J1 is removed from the resin molded product P in another space apart from the molds (upper mold 3 and lower mold 2), and the unnecessary resin J1 is discarded, as shown in FIG. 13(c). Here, the covering body 7 remains in the cull portion 32 or the runner portion 33 after the resin molding, and is contained in the unnecessary resin J1 (the cull J11 or the runner J12) remaining in the cull portion 32 and the runner portion 33, It is discarded together with the unnecessary resin J1.

<Effects of this embodiment>
According to the resin molding apparatus 100 of the present embodiment, the coating winding mechanism 8 for winding the coating 7 around the outer circumferential surface of the resin material J is provided. The resin material J with the covering 7 wound thereon can be used for resin molding. As a result, the cover 7 surrounding the resin material J is arranged between the inner surface of the pot 21 and the resin material J during resin molding, so that the resin material J can be prevented from touching the inner surface of the pot 21. Resin scum adhering to the inner surface of 21 can be reduced. In addition, since the resin material J is surrounded by the cover 7, even if the resin material J is a mold underfill (MUF) resin or a high-flow resin such as a clear resin, the sliding between the inner surface of the pot 21 and the plunger 51 is prevented. It becomes difficult for the molten resin material J to enter the sliding portion, and resin scum generated by the resin material J entering the sliding portion can be reduced. Here, since the cover 7 is open in the direction in which the resin material J is extruded, it does not interfere with the extrusion of the resin material J by the plunger 51 .

By reducing the resin residue in this way, contamination to the next resin molding can be reduced, and the quality of the resin molded product P can be improved. In addition, it is possible to prevent facility troubles caused by resin residue and reduce the frequency of cleaning work. Furthermore, by using the cover 7, it is possible to prevent an increase in the sliding resistance of the plunger 51, so that the quality of the resin molded product P can be stabilized and the life of the pot 21 and the plunger 51 can be extended.

The coating winding mechanism 8 of the present embodiment is configured to wind the coating 7 while the resin material J is stored in the resin storage portion 81 (cylindrical storage space). Regardless of tolerances, the covering 7 can be reliably wound.

<Other Modified Embodiments>
It should be noted that the present invention is not limited to the above embodiments.

For example, in the above-described embodiment, after the resin material J is accommodated in the resin containing portion 81, the covering 7 is inserted into the resin containing portion 81 and wound. The resin material J may be accommodated in the resin accommodation portion 81 by inserting the resin material J into the inside of the cover 7 wound into the cylindrical shape in the resin accommodation portion 81 after forming the resin material J into a cylindrical shape. With this configuration, adhesion of resin powder (resin residue) to the resin accommodating portion 81 can be reduced.

Further, when the resin material J is accommodated after the covering member 7 is inserted into the resin accommodating portion 81, the covering member 7 inside the resin accommodating portion 81 may prevent the resin material J from being inserted. In order to solve this problem, it is conceivable to provide a guide mechanism for guiding the insertion of the resin material J by pressing the cover 7 in the resin containing portion 81 against the inner surface of the resin containing portion 81 .

Furthermore, although the fixing part 831 of the above-described embodiment is configured to adsorb the cover 7 and fix it to the upper surface of the cover winding jig, the cover 7 is pressed to the upper surface of the cover winding jig and fixed. The configuration may be such that

Moreover, the slit-shaped opening 82 may be connected to the upper portion of the resin containing portion 81 or may be positioned so that the cover 7 can be inserted into the resin containing portion 81 . It may be configured to be connected to the side or the bottom.

In the above embodiment, the pot is formed in the lower mold and the cavity is formed in the upper mold, but the pot or cavity may be formed in any mold.

Also, the pot and plunger are not limited to having a circular cross-section, and may have other shapes such as a rectangular cross-section or other polygonal cross-section.

Furthermore, although the resin material transport mechanism of the above-described embodiment is divided into the first transport section, the second transport section, and the transport storage section, the first transport section and the second transport section are configured by one transport section. Alternatively, the second conveying section and the conveying/accommodating section may be configured by one conveying section. Alternatively, the resin material may be transported from the covering winding mechanism to the pot by one transport unit.

Moreover, the resin molding apparatus is not limited to the multi-plunger type, and may have one plunger. In this case, the plunger unit is configured to have one plunger.

Moreover, the pair of molds is not limited to the upper mold and the lower mold, and may be other molds that can be used for transfer molding (for example, a top gate type mold with an intermediate plate). good.

In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications are possible without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100... Resin molding apparatus J... Resin material P... Resin molded product 10... Resin molding mechanism 21... Pot 2... Mold (lower mold)
32 Cull portion 33 Runner portion 7 Cover 8 Cover winding mechanism 81 Resin accommodating portion 81a Escaping portion 81x Guide surface 82 Opening Part 83... Feeding mechanism 831... Fixing part 832... Cutting part 833... Insertion side roller 834... Winding part side roller 84... Push part 9... Resin material conveying mechanism

Claims (10)

a covering winding mechanism for winding the covering on the outer peripheral surface of the resin material;
a resin molding mechanism that performs resin molding using the resin material in which the covering is wound,
The resin molding apparatus, wherein the covering body winding mechanism includes a resin storage section that stores the resin material, and a delivery mechanism that delivers the coating body to the resin storage section. The cover winding mechanism has a slit-shaped opening communicating with the resin container,
2. The resin molding apparatus according to claim 1, wherein said feeding mechanism feeds said cover from said opening to said resin container. The delivery mechanism has a fixing portion for fixing the covering outside the resin containing portion, and a cutting portion for cutting the covering fixed by the fixing portion. 3. The resin molding apparatus according to claim 1, wherein the covering body is fed into the resin container. The covering is in the form of a sheet,
The width dimension of the covering is a dimension that can cover the entire axial direction of the outer peripheral surface of the resin material,
4. The resin molding apparatus according to claim 3, wherein the length of the covering cut by the cutting section is such that one or more turns of the outer peripheral surface of the resin material can be made. 5. The resin molding apparatus according to any one of claims 1 to 4, wherein said delivery mechanism has a roller for delivering said covering. The delivery mechanism has two rollers that are provided apart along a predetermined delivery direction and deliver the covering,
5. The resin molding apparatus according to claim 3, wherein said fixing portion and said cutting portion are provided between said two rollers. 7. The resin molding apparatus according to any one of claims 1 to 6, further comprising a resin material conveying mechanism that conveys the resin material around which the covering is wound to the resin molding mechanism. The covering body winding mechanism has a push section that pushes the resin material wound with the covering body to the resin material conveying mechanism for delivery,
8. The resin molding apparatus according to claim 7, wherein said resin containing portion is formed with a relief portion for avoiding interference with said pushing portion. 9. The resin molding apparatus according to claim 8, wherein a guide surface is formed on an inner surface of said relief portion for guiding said cover in a traveling direction of said cover. A method of manufacturing a resin molded product using the resin molding apparatus according to any one of claims 1 to 9.

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