KR102571952B1 - Resin molding apparatus and resin molded product manufacturing method - Google Patents

Abstract

The present invention enables stable recovery of unnecessary resin and at the same time simplifies the structure of the transfer mechanism. The lower frame 3 on which W1) is mounted, the frame fastening mechanism 5 for fastening the upper frame 2 and the lower frame 3, and the lower frame 3 are provided to accommodate the resin material J. A plurality of ports 41a are formed, and a port block 41 having a protrusion 411 protruding (protruding) onto the mold surface of the lower frame 3, and inside each of the plurality of ports 41a. A transfer mechanism 42 having a plurality of plungers 421 provided and moving the plurality of plungers 421 to inject the resin material J from a plurality of ports 41a into the cavity 2a is provided, and an upper frame is provided. (2) Or, in the port block 41, a connection portion 41d for connecting the remaining unnecessary resin K corresponding to each of the plurality of ports 41a is formed, and the transfer mechanism 42 has a plurality of The plunger 421 is moved by the same movement amount.

Description

Resin molding apparatus and manufacturing method of resin molding {RESIN MOLDING APPARATUS AND RESIN MOLDED PRODUCT MANUFACTURING METHOD}

The present invention relates to a resin molding apparatus and a method for manufacturing a resin molded article.

Conventionally, for example, as disclosed in Patent Document 1, an upper mold and a lower mold are die-clamped, and the gate block provided on the lower mold is part of the substrate. It is conceivable to perform resin sealing by injecting molten resin into the cavity portion of the upper frame from a space formed between the upper surface of the gate block and the lower surface of the upper frame in a state of pushing the lower frame into contact with the lower frame.

In this resin encapsulation device, a spring for moving the gate block up and down is provided below the gate block, and is compressed during frame fastening. Then, when the upper frame and the lower frame are opened, the spring is restored from the compressed state, and the gate block is pushed up relative to the upper surface (mold surface) of the lower frame. A runner, which is an unnecessary resin on the block, is separated from the substrate.

Japanese Unexamined Patent Publication No. 2000-311908

However, in the resin molding apparatus described above, a plurality of unnecessary resin runners are formed corresponding to each of a plurality of ports, so that a plurality of unnecessary resins remain on the gate block after resin molding. For this reason, it is necessary to collect these plural unnecessary resins one by one, and as the number of unnecessary resins on the gate block increases, there is a fear that the stability of recovery of unnecessary resins is impaired.

In addition, the resin passage portion composed of the knife portion, the runner portion, and the gate portion is formed independently for each port, and in order to make the injection pressure of the resin injected from each port into the cavity portion uniform, an elastic member or the like is attached to the support block supporting the plunger. It is also necessary to provide an equal pressure mechanism using .

Then, this invention was made in order to solve the said problem, and it makes it the main subject to simplify the structure of a transfer mechanism while being able to collect unnecessary resin stably.

That is, the resin molding apparatus according to the present invention includes a first frame in which a cavity is formed, a second frame on which an object to be molded is placed opposite to the first frame, and the first frame and the above frame. A frame fastening mechanism for fastening the second frame, a port provided on the second frame, formed with a plurality of ports for accommodating a resin material, and having a protruding portion projecting onto the mold surface of the second frame. a transfer mechanism having a block and a plurality of plungers provided inside each of the plurality of ports, and injecting the resin material from the plurality of ports into the cavity by moving the plurality of plungers; It is characterized in that the port block is formed with a connection portion for connecting unnecessary resin remaining corresponding to each of the plurality of ports, and the transfer mechanism moves the plurality of plungers by the same movement amount.

In addition, the method for producing a resin molded product according to the present invention is a method for producing a resin molded product using the above resin molding apparatus.

According to the present invention structured as described above, unnecessary resin can be stably recovered and the structure of the transfer mechanism can be simplified.

1 is a schematic diagram showing the configuration of a resin molding apparatus according to one embodiment of the present invention.
Fig. 2 is a schematic diagram showing the configuration of a forming module of the same embodiment.
Fig. 3 is a plan view schematically showing (a) a port block and (b) a schematic diagram showing unnecessary resin in the same embodiment.
Fig. 4 is (a) a plan view and (b) a right side view schematically showing the configuration of a transfer mechanism of the same embodiment.
Fig. 5 is a schematic view showing a substrate mounting state and a resin material loading state of the molding module of the same embodiment.
Fig. 6 is a schematic diagram showing a frame fastening state of the forming module of the same embodiment.
Fig. 7 is a schematic diagram showing a resin injection state in the molding module of the same embodiment.
Fig. 8 is a schematic diagram showing the reference position X of the forming module of the same embodiment.
Fig. 9 is a schematic diagram showing a peeling state of the forming module of the same embodiment.
Fig. 10 is a schematic diagram showing the state at the start of the frame opening operation of the forming module of the same embodiment.
Fig. 11 is a schematic diagram showing a gate break operation during frame opening operation of the forming module of the same embodiment.
Fig. 12 is a schematic diagram showing a state after a gate break during frame opening operation of the forming module of the same embodiment.
Fig. 13 is a schematic diagram showing a frame open state of the forming module of the same embodiment.
Fig. 14 is a schematic view showing a state in which each adsorption part of the unloader of the same embodiment is in contact with a resin molded product and unnecessary resin.
Fig. 15 is a schematic view showing a state in which an adsorption unit for an unnecessary resin is reduced due to an increase in an unnecessary resin in the same embodiment.
Fig. 16 is a schematic diagram showing a state in which the unloader of the same embodiment adsorbs and carries out a resin molded product and unnecessary resin.
Fig. 17 is a schematic diagram showing (a) a scraping position and (b) a rod position in a scraping operation in the same embodiment.

Next, the present invention will be described in more detail by way of example. However, this invention is not limited by the following description.

As described above, in the resin molding apparatus of the present invention, a first frame in which a cavity is formed, a second frame on which an object to be molded is mounted opposite to the first frame, and the first frame and the second frame are clamped together. A port block provided on the second frame, formed with a plurality of ports for accommodating resin materials, and having a protruding portion (protruding) onto the mold surface of the second frame. and a transfer mechanism having a plurality of plungers provided inside each of the plurality of ports and injecting the resin material from the plurality of ports into the cavity by moving the plurality of plungers, The port block is characterized in that a connection portion for connecting unnecessary resin remaining corresponding to each of the plurality of ports is formed, and the transfer mechanism moves the plurality of plungers by the same movement amount.

With this resin molding apparatus, since unnecessary resin remaining corresponding to each of a plurality of ports can be connected by the connecting portion, unnecessary resin on the port block can be integrated after resin molding. For this reason, not only can unnecessary resin be recovered stably, but also the structure of the transport mechanism for recovering unnecessary resin can be simplified.

Further, since a plurality of ports communicate with each other by the connecting portion, even if the transfer mechanism moves a plurality of plungers by the same movement amount, the resin material injected from each port moves back and forth through the connecting portion, thereby increasing the injection pressure of the resin material. Since uniformity can be achieved, the transfer mechanism does not need to have an equal pressure mechanism. This makes it possible to simplify the configuration of the transfer mechanism.

As a specific embodiment for connecting unnecessary resins, the first frame or the port block has a plurality of cut portions formed corresponding to each of the plurality of ports, and the connecting portions are adjacent to each other (adjacent to each other). It is thought that it is to connect the said unnecessary resin by connecting a cut part.

Here, in order to simplify the structure of the first frame, it is preferable that the plurality of cut portions and the connection portion are formed in the port block.

Further, with this configuration, the contact area between the port block and the unnecessary resin is larger than the contact area between the first frame and the unnecessary resin, and the unnecessary resin is peeled from the first frame without peeling from the port block. This makes it possible to eliminate the need for an ejector pin for contacting and exfoliating the unwanted resin from the first frame.

Unwanted resin is accommodated in a discard box after being recovered from the port block. Here, if all of the plurality of unnecessary resins are connected as one body, the dead space in the discard box increases, and the accommodation space becomes larger than the actual volume of the unnecessary resin. For this reason, it is preferable that the said connection part divides the said some unnecessary resin into several sets, and connects them.

As a specific embodiment of the transfer mechanism, it has a structure that does not have a pressure equalization mechanism for uniformizing the injection pressure of the resin material, and a fixed block to which the plurality of plungers are fixed, and by moving the fixed block, the plurality of plungers It is conceivable to include a plunger driving unit that moves the .

It is conceivable that the resin molding apparatus of the present invention further includes a conveyance mechanism for carrying out unnecessary resin on the pot block after resin molding, and the conveyance mechanism has an adsorption section for adsorbing the unnecessary resin.

In this configuration, in the present invention, since a plurality of unnecessary resins are connected by connecting portions to form one lump and the number of unnecessary resins is reduced, the number of adsorption portions for unnecessary resins can be reduced and the configuration of the transport mechanism is simplified. I can.

In the case where unnecessary resin is adsorbed and recovered, the unnecessary resin adheres closely to the pot block and is difficult to come off, and the unnecessary resin cannot be recovered in some cases. Another problem is that when removing unnecessary resin from the port block, the pressure in the pot becomes negative, making it difficult for the unnecessary resin to separate from the port block. In addition, there is a problem that unnecessary resin is difficult to separate from the pot block even by the frictional force between the unnecessary resin and the upper surface of the pot block.

In order to suitably solve this problem, after the conveying mechanism brings the adsorbing part for the unnecessary resin into contact with the unnecessary resin on the port block, the transfer mechanism moves the plunger toward the first frame to move the port block to the port block. It is preferable to carry out the unnecessary resin by exfoliating the unnecessary resin from the block, and then adsorbing the unnecessary resin by the adsorption unit for the unnecessary resin in the conveying mechanism.

With this configuration, unnecessary resin on the pot block can be stably recovered. Specifically, since the unnecessary resin is separated from the port block by the plunger before the unwanted resin is adsorbed by the adsorption unit for unnecessary resin, the unnecessary resin adsorbed by the adsorption unit for unnecessary resin can be reliably recovered from the port block. there is a number In addition, since the adsorbing part for the unwanted resin is in contact with the unnecessary resin when the plunger is used to peel the unnecessary resin from the port block, it is possible to prevent adsorption failure caused by tilting of the unnecessary resin on the port block or the like. As a result of the above, unnecessary resin on the pot block can be stably recovered.

Even if the plunger is moved toward the first mold and the unnecessary resin is peeled off from the port block, if the plunger and the unnecessary resin are tightly bonded to each other, there is a problem with the recovery of the unnecessary resin thereafter. there is

In order to solve this problem, the transfer mechanism moves the plunger to the side opposite to the first frame before peeling the unnecessary resin from the port block by moving the plunger toward the first frame, It is preferable to peel off the said unnecessary resin from a plunger.

With this configuration, since the plunger and the unnecessary resin are previously separated, the unnecessary resin can be easily recovered.

The conveying mechanism has a molded product adsorbing portion for adsorbing the resin molded product, adsorbs the unnecessary resin with the unnecessary resin adsorbing portion, and adsorbs the resin molded product with the molded product adsorbing portion. It is preferable to carry out unnecessary resin and the said resin molded article.

With this configuration, since the resin molded product and unnecessary resin can be carried out at once by a common transport mechanism, the carrying time can be shortened and the configuration of the resin molding apparatus can be simplified.

In order to prevent interference between the projecting portion of the port block and the resin molded product when carrying out the resin molded product, the conveying mechanism moves the molded product adsorption unit that has adsorbed the resin molded product and separates it from the pot block, and removes the resin molded product as described above. It is preferable to have a moving mechanism for moving outwardly from the protruding portion.

As a previous step for stably recovering unnecessary resin, it is necessary to reliably separate the resin molded product from the unnecessary resin. For this reason, during a frame opening operation in which the frame fastening mechanism opens the first frame and the second frame, the transfer mechanism moves the plunger toward the first frame, so that the mold surface of the second frame is formed. It is preferable to separate the resin molded product and the unnecessary resin on the port block.

In this way, since the resin molded product and the unnecessary resin are separated using the plunger, they can be separated reliably.

When the port block is provided so as to be able to move forward and backward with respect to the second frame via an elastic member, during frame opening operation of the frame fastening mechanism for opening the first frame and the second frame, the elastic member It is preferable to separate the resin molded product on the mold surface of the second mold and the unnecessary resin on the port block by moving the port block toward the first mold under the restoring force of the second mold.

With this configuration, the resin molded product and the unnecessary resin can be separated by utilizing the elastic force of the elastic member compressed during frame fastening.

The port block is in a state where the unnecessary resin is sandwiched (interposed) with the first frame by the elastic force of the elastic member for a predetermined period from the start of the frame opening operation, and after the predetermined period has elapsed , It is preferable to peel the unnecessary resin from the first frame while maintaining the unnecessary resin.

With this configuration, in a state where unnecessary resin is sandwiched between the port block and the first frame, the resin molded article and the unnecessary resin are separated, and unnecessary resin suddenly comes out (separates) from the port block at the time of their separation. It can be prevented. Also, since the unnecessary resin does not fall out (separate) from the pot block during their separation, it is possible to prevent adsorption failure caused by, for example, the unnecessary resin leaning on the pot block.

When recovering unnecessary resin after frame opening, if the port block is not in the initial state restored by the elastic member, there is a possibility that the pot block suddenly moves before and after contacting the adsorption unit for unnecessary resin. Then, adsorption of unnecessary resin cannot be performed, and there is a possibility that recovery may be defective.

In order to solve this problem, the transfer mechanism moves the plunger toward the first frame until the elastic member returns to the initial state restored before the frame opening by the frame fastening mechanism is completed. , It is preferable that the conveying mechanism brings the unnecessary resin adsorption portion into contact with the unnecessary resin on the port block in the initial state.

Moreover, the manufacturing method of the resin molded article using the resin molding apparatus mentioned above is also one aspect of this invention.

<One embodiment of the present invention>

EMBODIMENT OF THE INVENTION Below, 1 Embodiment of the resin molding apparatus which concerns on this invention is described with reference to drawings. In addition, about any drawing shown below, in order to make it easy to understand, it is appropriately abbreviated or exaggeratedly drawn schematically. About the same component, the same code|symbol is attached|subjected and description is abbreviate|omitted suitably.

<Overall configuration of resin molding equipment>

In the resin molding apparatus 100 of the present embodiment, the object W1 to be molded to which the electronic component Wx is connected is resin molded by transfer molding using a resin material J.

Here, the object W1 to be molded is, for example, a metal substrate, a resin substrate, a glass substrate, a ceramic substrate, a circuit board, a semiconductor substrate, a wiring board, a lead frame, and the like, with or without wiring. In addition, 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 granular, powdery, or liquid. , sheet form or tablet form, etc. In addition, as the electronic component Wx connected to the upper surface of the object W1 to be molded, it is, for example, a bare chip or a resin-encapsulated chip.

Specifically, as shown in FIG. 1 , the resin molding apparatus 100 includes a supply module 100A for supplying an object W1 to be molded before molding and a resin material J, and a molding module 100B for resin molding. , and a housing module 100C for accommodating the molded object W2 (hereinafter referred to as resin molded product W2) after molding is provided as a component. In addition, the supply module 100A, the molding module 100B, and the storage module 100C can be attached to or detached from each other with respect to different components, and can also be exchanged. Moreover, each component can also be increased, such as making two or three molding modules 100B.

The supply module 100A includes a molding object supply unit 11 for supplying the molding object W1, a resin material supply unit 12 for supplying the resin material J, and the molding object W1 from the molding object supply unit 11. ) is received and conveyed to the molding module 100B, and the conveying device 13 (hereinafter, the loader 13) that receives the resin material J from the resin material supply unit 12 and conveys it to the molding module 100B is It is provided.

The loader 13 moves back and forth between the supply module 100A and the molding module 100B, and moves along a rail (not shown) provided across the supply module 100A and the molding module 100B.

As shown in FIG. 2 , the molding module 100B is a first mold 2 (hereinafter referred to as an upper mold 2)) and a second frame 3 (which is the other side of the molding die) disposed facing the upper frame 2 and provided with a resin injecting portion 4 for injecting the resin material J into the cavity 2a ( Hereinafter, the lower frame 3 and the frame fastening mechanism 5 for fastening the upper frame 2 and the lower frame 3 are provided. The upper frame 2 is held in the upper frame holder 101, and the upper frame holder 101 is fixed to the upper platen 102. Further, the upper frame 2 is attached to the upper frame holder 101 via the upper frame base plate 103. The lower frame 3 is held in a lower frame holder 104, and the lower frame holder 104 is fixed to a movable platen 105 that moves up and down by a frame fastening mechanism 5. Further, the lower frame 3 is attached to the lower frame holder 104 via the lower frame base plate 106.

The resin injection unit 4 includes a port block 41 having a port 41a for accommodating the resin material J, and a transfer mechanism 42 having a plunger 421 provided in the port 41a. . In addition, the port 41a is formed by the cylindrical member 410 which forms a cylindrical shape, for example. This tubular member 410 is fitted (fitted) into a through hole formed in the port block 41 .

The port block 41 is elastically supported by an elastic member 43 so as to be able to move up and down relative to the lower frame 3 . In other words, the port block 41 is provided so as to be able to move up and down with respect to the lower frame 3 via the elastic member 43 . In addition, the elastic member 43 is provided below the port block 41 .

Further, at the upper end of the port block 41, a protrusion 411 protrudes (protrudes) onto the mold surface, which is the upper surface of the lower frame 3, is formed. Further, on the upper surface of the port block 41, a cut portion 41b and a gate portion 41c serving as a resin passage through which the resin material J injected from the port 41a is introduced into the cavity 2a are formed. Further, the protruding portion 411, in a state where the upper frame 2 and the lower frame 3 are fastened, has its upper surface in contact with the upper frame 2 and at the same time, its lower surface holds the object W1 to be molded on the lower side. It is sandwiched (interposed) between the mold surface of the frame 3.

As shown in Fig. 3(a), in the port block 41 of this embodiment, a plurality of ports 41a are formed in a straight line, for example. In addition, in FIG.3 (a), although the example in which eight ports 41a were formed in the one port block 41 was shown, it is not limited to this, You may change suitably. Further, on the upper surface of the port block 41, a plurality of cut portions 41b are formed corresponding to each of the plurality of ports 41a, and a plurality of gate portions 41c are formed corresponding to each of the plurality of cut portions 41b. is formed

And in the port block 41, the connection part 41d for connecting the remaining unnecessary resin K corresponding to each of the some port 41a is formed. In addition, unnecessary resin K is resin which remained and hardened on the port block 41 after resin molding. Moreover, the connection part 41d connects the mutually adjacent blade part 41b, and forms a groove shape, for example. Here, the connecting portion 41d is formed so as to connect the consecutive four cut portions 41b, and thereby, as shown in Fig. 3(b), remaining corresponding to each of the plurality of ports 41a A plurality of unnecessary resins K are divided into a plurality of sets (here two sets) and connected. In addition, below, the thing which connects several unnecessary resin (K) integrally is also called unnecessary resin body (KM).

The transfer mechanism 42 moves a plurality of plungers 421 in a state in which the upper frame 2 and the lower frame 3 are fastened to transfer the resin material J from the plurality of ports 41a to the cavity 2a. is to inject

This transfer mechanism 42 has a structure that does not have a pressure equalization mechanism using, for example, an elastic member for equalizing the injection pressure of the resin material J, and a plurality of plungers 421 are connected to respective ports 41a. It is to move with the same movement amount in .

Specifically, as shown in FIG. 4 , the transfer mechanism 42 is provided inside each of the plurality of ports 41a and includes a plurality of plungers for pressure-feeding the molten resin material J ( 421), a fixed block 422 to which the plurality of plungers 421 are fixed, and a plunger drive unit 423 that collectively moves the plurality of plungers 421 by the same amount of movement by moving the fixed block 422 Have.

The fixing block 422 has a substantially (approximately) rectangular parallelepiped shape, and a plurality of plungers 421 are fixed in a straight line to one surface (upper surface) forming the rectangular shape. The arrangement manner of the plurality of plungers 421 corresponds to the arrangement manner of the plurality of ports 41a. Further, the plurality of plungers 421 are fixed to the fixing block 422 by fixing screws or the like, for example. Also, the plurality of plungers 421 have the same shape as each other.

The plunger driving unit 423 lifts and moves the plurality of plungers 421 collectively with the same movement amount with respect to the plurality of ports 41a by moving the fixed block 422 up and down with respect to the lower frame 3. . The plunger driving unit 423 of this embodiment is provided below the fixed block 422 . Here, as the plunger drive unit 423, a combination of a servomotor and a ball screw mechanism, a combination of an air cylinder or a hydraulic cylinder, and a rod can be used, for example.

As shown in FIG. 2 , the upper frame 2 is formed with a cavity 2a that accommodates the electronic component Wx of the object W1 and into which the molten resin material J is injected. In addition, in the upper frame 2, a concave portion 2b is formed in a portion facing the port block 41, and the cut portion 41b and the gate portion 41c of the port block 41 and the cavity 2a are formed. The runner part 2c which connects is formed. In addition, although not shown, an air vent (ventilation hole) is formed in the upper frame 2 on the side opposite to the port block 41. In addition, the runner part 2c can be omitted and the knife part 41b and the cavity 2a can be directly connected via the gate part 41c.

In addition, the upper frame 2 is provided with a plurality of ejector pins 61 for separating the molded object W2 from the upper frame 2 after resin molding. These ejector pins 61 are provided so as to be able to move up and down with respect to the upper frame 2 by penetrating a required location of the upper frame 2, and to the ejector plate 62 provided on the upper side of the upper frame 2. It is fixed. The ejector plate 62 is provided on the upper platen 102 or the like via the elastic member 63, and has a return pin 64. At the time of frame fastening, the ejector plate 62 is lifted relative to the upper frame 2 by the return pin 64 coming into contact with the lower frame 3 outside the area where the object W1 is to be molded is placed. let it As a result, the ejector pins 61 are drawn (retracted) into the mold surface of the upper frame 2 at the time of fastening the frame. On the other hand, when the frame is opened, as the lower frame 3 descends, the ejector plate 62 descends relative to the upper frame 2, and the ejector pin 61 is moved by the elastic force of the elastic member 63. The resin molded product W2 is detached (released) from the upper mold 2.

Then, when the upper frame 2 and the lower frame 3 are fastened by the frame fastening mechanism 5, the knife portion 41b, the gate portion 41c, the concave portion 2b, and the runner portion 2c are formed. The resin flow path connects the plurality of ports 41a and the cavity 2a (see Fig. 6). In addition, when the upper frame 2 and the lower frame 3 are fastened, the port side end of the molding object W1 is between the lower surface of the protrusion 411 of the port block 41 and the mold surface of the lower frame 3. to be pinched (to be pinched) In this state, when the melted resin material J is injected into the cavity 2a by the plurality of plungers 421, the electronic component Wx of the object W1 to be molded is sealed with resin.

As shown in FIG. 1, the storage module 100C includes a storage unit 14 for housing the resin molded product W2, and a storage unit 14 for receiving the resin molded product W2 from the molding module 100B. A conveying device 15 (hereinafter referred to as an unloader 15) for conveying is provided.

The unloader 15 moves back and forth between the molding module 100B and the storage module 100C, and moves along a rail (not shown) provided across the molding module 100B and the storage module 100C.

<Operation of Resin Molding Apparatus 100>

The operation of this resin molding apparatus 100 will be briefly described with reference to FIGS. 5 to 16 . 5 to 16 show only one side (left side) of the port block 41 and omit the other side (right side), but in each drawing, the state of the other side is the same as the state of one side . In addition, the following operation|movement is performed, for example by the control part COM provided in supply module 100A controlling each part.

As shown in FIG. 5, in the state where the upper frame 2 and the lower frame 3 are opened, the object W1 to be molded before molding is conveyed by the loader 13 and passed to the lower frame 3, It is witted (placed). At this time, the temperature of the upper mold 2 and the lower mold 3 is raised to a temperature at which the resin material J can be melted and cured. After that, the resin material J is conveyed by the loader 13 and accommodated in the plurality of ports 41a of the port block 41 .

In this state, when the lower frame 3 is raised by the frame fastening mechanism 5, as shown in FIG. 6, the port block 41 touches the upper frame 2 and descends with respect to the lower frame 3. Thus, the lower surface of the protrusion 411 comes into contact with the port-side end of the object W1 to be molded. Further, the lower surface of the upper frame 2 is in contact with the outer peripheral portion of the object W1 to be molded, to which the protruding portion 411 does not contact. As a result, the upper frame 2 and the lower frame 3 are fastened together. After this clamping, when the transfer mechanism 42 raises the plurality of plungers 421 by the same movement amount by the plunger drive unit 423, as shown in FIG. 7 , the melted resin material in the plurality of pots 41a ( J) is injected into the cavity 2a through the resin passage. At this time, the injection pressure of the resin material J injected from each port 41a is made uniform through the connection portion 41d. After the predetermined molding time elapses and the resin material J is cured in the cavity 2a, the mold fastening mechanism 5 opens the molds of the upper mold 2 and the lower mold 3.

Here, in the resin molding apparatus 100 of the present embodiment, during the frame opening operation in which the frame fastening mechanism 5 opens the upper frame 2 and the lower frame 3, the resin molded product W2 and the unnecessary resin ( K) is separated (gate break operation).

For example, just before the above molding time elapses (before the frame opening operation starts), the transfer mechanism 42, as shown in FIG. 8 , a plurality of plungers 421 push the unnecessary resin K. The force is reduced to a force of a predetermined value (for example, a force of a relatively small value enough to maintain a contact state without peeling of the plurality of plungers 421 and the unnecessary resin K). In addition, the pushing force of the plurality of plungers 421 is measured by force sensors (including weight sensors, load sensors, etc.) such as load cells (not shown) provided on the driving shaft (transfer shaft) of the plunger driving unit 423 or the like. .

Then, the control unit COM stores the position of the plunger 421 when the force reaches the predetermined value as the reference position X (see Fig. 8). This reference position X is a position serving as a reference for the gate breaking operation described later and the frame separation/recovery of unnecessary resin K. Note that the reference position X is not limited to the position of the plunger 421, and may be the position of other members such as a drive shaft (transfer shaft) of the plunger drive unit 423 connected to the plunger 421.

Then, before the start of the frame opening operation, as shown in FIG. 9 , the transfer mechanism 42 lowers the plurality of plungers 421 to the side opposite to the upper frame 2 to remove a predetermined amount (peel off). ) down to position (Y). By lowering the plurality of plungers 421 to the release position Y, the upper surfaces of the plurality of plungers 421 and the lower surfaces of the unnecessary resin K are separated. After this removal operation, the transfer mechanism 42 raises the plurality of plungers 421 to the reference position X described above. At this time, the upper surfaces of the plurality of plungers 421 contact the lower surfaces of the unnecessary resin K (state in FIG. 8 ).

Next, as shown in Fig. 10, when the frame fastening mechanism 5 starts lowering of the lower frame 3, the frame opening operation is started. At the timing when the frame fastening mechanism 5 starts the frame opening operation and the clamping force decreases to a predetermined value (different from the predetermined value in the transfer mechanism 42 described above), as shown in FIG. 11, the transfer mechanism (42) raises the plurality of plungers 421 toward the upper frame 2. Thereby, unnecessary resin K on the port block 41 is pushed toward the upper frame 2 by the plurality of plungers 421 . The clamping force is measured by a force sensor (including a weight sensor, a load sensor, etc.) such as a load cell (not shown) provided on the clamp shaft of the frame fastening mechanism 5 or the like.

In addition, when the transfer mechanism 42 raises the plurality of plungers 421 toward the upper frame 2, the port block 41, as shown in FIG. 11 , the restoring force of the compressed elastic member 43 It receives the elastic force and rises from the lower frame (3) toward the upper frame (2). In other words, during the frame opening operation, the port block 41 rises from the lower frame 3 toward the upper frame 2 by receiving the elastic force of the elastic member 43, and at the same time, the transfer mechanism 42 moves a plurality of The plunger 421 is raised from the lower frame 3 toward the upper frame 2.

In addition, during the frame opening operation, the timing at which the port block 41 starts to rise from the lower frame 3 toward the upper frame 2 by receiving the elastic force of the elastic member 43 and the transfer mechanism 42 The timing at which the plurality of plungers 421 are started to rise from the lower frame 3 toward the upper frame 2 may coincide or may differ.

As shown in FIG. 12, by the elevation of the plurality of plungers 421 by the transfer mechanism 42 and the elevation of the port block 41 by the elastic force of the elastic member 43, the lower frame 3 The resin molded product W2 on the mold surface of and the unnecessary resin K on the port block 41 are separated (gate break).

At this time, the resin molded product W2 on the lower frame 3 is pressed toward the mold surface of the lower frame 3 by the ejector pins 61 provided on the upper frame 2, and the resin molded product ( The lower surface of W2) is in close contact with the mold surface of the lower frame 3 (see Fig. 11). This ejector pin 61 functions as a pressing member for pressing the resin molded product W2 against the mold surface of the lower frame 3 when separating the resin molded product W2 from the unnecessary resin K. Since the resin molded product W2 is pressed against the mold surface of the lower frame 3 by the pressing member in this way, shear stress is easily applied between the resin molded product W2 and the unnecessary resin K, and gate breaking is easy.

Here, the ejector pin 61 as a pressing member presses the resin molded product W2 toward the mold surface of the lower frame 3 at least until the resin molded product W2 and unnecessary resin K are separated. In other words, during the mold opening operation, while the ejector pin 61 is pressing the resin molded product W2, the above-described port block 41 is raised and the plunger 421 is lifted to release the resin molded product W2. Separation of the resin and the unnecessary resin (K) is completed.

During the above gate break, the unnecessary resin K is in a state of being caught (interposed) between the upper surface of the port block 41 and the lower surface of the upper frame 2, which are pushed upward by the elastic force of the elastic member 43. (See Figures 11 and 12). In other words, the port block 41 is sandwiched (interposed) with the unnecessary resin K between the upper frame 2 by the elastic force of the elastic member 43 in a predetermined period from the start of the frame opening operation. become in a state In addition, the predetermined period is a period including at least until the gate break is completed, and the lower frame 3 so that the elastic member 43 returns to the restored initial state (state before being pushed and compressed by the upper frame 2). is the period until it descends.

Then, after the lapse of a predetermined period, in other words, as the frame clamping mechanism 5 further lowers the lower frame 3, as shown in FIG. 13, the port block 41 removes unnecessary resin K. Unnecessary resin (K) is peeled from the upper frame (2) while maintaining it. Here, the cut portion 41b and the gate portion 41c are formed in the port block 41, and the contact area between the port block 41 and the unnecessary resin K is the upper frame 2 and the unnecessary resin K Since it is larger than the contact area with , unnecessary resin K is peeled from the upper frame 2 without peeling from the port block 41 . Moreover, the connection part 41d also contributes to the increase of the contact area of the port block 41 and unnecessary resin K. This makes it possible to eliminate the need for an ejector pin for contacting and peeling the unnecessary resin K from the upper frame 2 .

Further, as the transfer mechanism 42 raises the plurality of plungers 421 toward the upper frame 2, the protruding portion 411 of the port block 41 moves between the mold surface of the lower frame 3 and the mold surface. From the state where the resin molded product W2 is sandwiched in, it becomes a non-contact state with the resin molded product W2.

In addition, apart from the gate brake described above, the transfer mechanism 42 drives the plurality of plungers 421 until the elastic member 43 on the lower side of the port block 41 returns to the initial state before frame fastening. Raise it towards the upper frame 2 (see Fig. 13). Thus, in the next resin molding, when the object W1 to be molded is placed below the protruding portion 411, the protruding portion 411 does not interfere.

After performing the above frame opening operation and separating the resin molded product W2 and unnecessary resin K, as shown in Figs. The resin (K) is taken out.

As shown in Fig. 14, the unloader 15 has a molded product adsorption unit 15a and an unnecessary resin adsorption unit 15b. The adsorption unit 15a for molded products and the adsorption unit 15b for unnecessary resin are both (both) constituted by resin adsorption pads, and in particular, the adsorption unit 15b for unnecessary resin is, for example, bellows. ) type (also referred to as a pleated box shape), and is superior in elasticity to the adsorbing portion 15a for molded products. Moreover, the suction part 15a for molded articles and the suction part 15b for unnecessary resin are provided in the base member 151, and are connected to the suction source, such as a suction pump not shown. The suction part 15a for a molded article adsorbs the resin molded article W2 to its suction opening part 15a1 when air is sucked by the suction source. The adsorbing portion 15b for unwanted resin adsorbs the unwanted resin K to its adsorbing opening 15b1 when air is sucked in by the suction source.

In addition, at least the adsorbing portion 15a for molded products is configured to be movable in the left-right direction and up-down direction with respect to the base member 151 by the moving mechanism 153 . In addition, the moving mechanism 153 includes a left-right moving unit having, for example, a rail and a slider for moving the molded product suction unit 15a in the left and right directions, and a horizontal movement unit for moving the molded product suction unit 15a in the vertical direction. For example, a vertical movement unit having a rail and a slider is provided. In addition, the unloader 15 is provided with holding claws 152 for holding the resin molded product W2 adsorbed by the molded product adsorption portion 15a to prevent falling.

After the frame opening operation described above is completed, the unloader 15 enters between the upper frame 2 and the lower frame 3. Then, as shown in Fig. 14, the adsorption opening 15a1 of the adsorption portion 15a for molded products is brought into contact with the upper surface of the resin molded product W2, and the adsorption opening portion 15b1 of the adsorption portion 15b for unnecessary resin is brought into contact with the upper surface of the resin molded product W2. ) is brought into contact with the upper surface of the unnecessary resin (K).

In this state, as shown in FIG. 15 , the transfer mechanism 42 raises the plurality of plungers 421 to lift the unnecessary resin K from the port block 41 . Here, when the unnecessary resin K has a remaining portion K1 remaining in the plurality of pots 41a, the remaining portion K1 rises to such an extent that the recovery of the unnecessary resin K is not hindered. let it As a result, the unwanted resin K is separated from the pot block 41 and adheres to the adsorbing portion 15b for unnecessary resin. At this time, the adsorption portion 15b for the unwanted resin elastically deforms and shrinks while the adsorption opening 15b1 remains in contact with the unnecessary resin K.

Here, as shown in Fig. 3(a), the port block 41 is unnecessary as shown in Fig. 3(b), since the plurality of cut portions 41b are connected to each other by means of the connecting part 41d. The resin K becomes one unnecessary resin body KM connected across a plurality of blade portions 41b, and the number of unnecessary resin K separated from each other on the port block 41 can be reduced. In addition to this, the number of adsorption parts 15b for unnecessary resins can also be reduced.

After the adsorption portion 15b for unwanted resin is in a reduced state, adsorption of the adsorption portion 15b for unwanted resin is started, and unwanted resin K is supplied to the adsorption opening 15b1 of the adsorption portion 15b for unwanted resin. adsorbed Further, adsorption of the adsorption portion 15a for molded products is started, and the resin molded product W2 is adsorbed to the adsorption opening 15a1 of the adsorption portion 15a for molded products.

And, as shown in FIG. 16, the adsorption|suction part 15a for molded articles which adsorbed the resin molded article W2 by the moving mechanism 153 is moved in the direction away from the port block 41, and the resin molded article W2 out of the protrusion 411. After that, after raising the unloader 15, it is withdrawn from the upper frame 2 and the lower frame 3. Thereby, the unloader 15 carries out the resin molded product W2 and unnecessary resin K. Here, since the unnecessary resin K and the plunger 421 are separated before peeling the unnecessary resin K from the port block 41 as described above, the unnecessary resin K is easy to recover.

Here, some of the unloaders 15 have cleaning mechanisms (not shown) for cleaning the upper frame 2 and the lower frame 3 . Moreover, as a cleaning mechanism, what has a rotating brush and a suction part which attracts and discharges dust is considered.

In this case, the unloader 15 adsorbing the resin molded product W2 and the unnecessary resin K stays between the upper frame 2 and the lower frame 3 to perform a cleaning operation.

Here, first, the transfer mechanism 42 performs an operation of scraping off the resin adhering to the plurality of ports 41a. In other words, the transfer mechanism 42 raises the plurality of plungers 421 to a predetermined scraping-out position, as shown in FIG. 18 . Here, the predetermined scraping-out position is, for example, a position where the upper surface of the plunger 421 is higher than the opening position of the port 41a. And the transfer mechanism 42 descends from the predetermined scraping-out position to the rod position for accommodating the resin material J. Thereafter, the transfer mechanism 42 raises the plurality of plungers 421 to a predetermined scraping-out position again. In this way, the resin adhering to the inside of the plurality of ports 41a is scraped out of the plurality of ports 41a.

Thereafter, the upper frame 2, the lower frame 3, the port block 41 and the plurality of plungers 421 are cleaned by the cleaning mechanism provided in the unloader 15. After completion of the cleaning operation, the unloader 15 is removed from the upper frame 2 and the lower frame 3, and the resin molded product W2 and unnecessary resin K are carried out.

<Effects of the present embodiment>

According to the resin molding apparatus 100 of the present embodiment, since the unnecessary resin K remaining corresponding to each of the plurality of ports 41a can be connected by the connecting portion 41d, the port block 41 after resin molding ) phase, the unnecessary resin (K) can be integrally formed. For this reason, not only can the unnecessary resin K be recovered stably, but also the structure of the unloader 15 for recovering the unnecessary resin K can be simplified.

Further, since the plurality of ports 41a communicate with each other by the connecting portion 41d, even if the transfer mechanism 42 has a configuration in which the plurality of plungers 421 are moved by the same amount of movement, the resin material injected from each port 41a ( When J) moves back and forth through the connecting portion 41d, the injection pressure of the resin material J can be equalized, and the transfer mechanism 42 does not need to have an equal pressure mechanism. Thereby, the structure of the transfer mechanism 42 can be simplified.

Further, in the present embodiment, since the connecting portion 41d divides a plurality of unnecessary resins K into a plurality of sets and connects them, the dead space in the discard box can be reduced when the unnecessary resin K is accommodated in the discard box. Therefore, it is possible to increase the amount of unnecessary resin (K) that can be accommodated in the discard box.

In addition, in this embodiment, since the unnecessary resin K is peeled from the port block 41 by the plunger 421 before the unnecessary resin K is adsorbed by the unnecessary resin adsorption portion 15b, it is unnecessary. Unnecessary resin K adsorbed by the adsorbing portion 15b for resin can be reliably recovered from the pot block 41 . In addition, when removing unnecessary resin K from the port block 41 by the plunger 421, since the adsorbing portion 15b for unnecessary resin is in contact with the unnecessary resin K, the unnecessary resin K is removed from the port block 41. Poor adsorption caused by tilting on the block 41 can be prevented. As a result of the above, unnecessary resin K on the port block 41 can be stably recovered.

Here, in the present embodiment, before peeling the unnecessary resin K from the port block 41, the plunger 421 is lowered to the opposite side of the upper frame 2, and the unnecessary resin ( Since the lower surface of K) is peeled off, it is possible to easily recover the separated unnecessary resin (K).

Further, in the present embodiment, when removing the unnecessary resin K from the port block 41, the adsorption portion 15b for the unnecessary resin elastically deforms and shrinks while remaining in contact with the unnecessary resin K, so that the port The adsorbing portion 15b for the unwanted resin can be kept in contact with the unnecessary resin K without obstructing the separation of the unnecessary resin K from the block 41 . For this reason, unnecessary resin (K) after peeling can be reliably adsorbed.

Further, in the present embodiment, since the unloader 15 has a molded product adsorption unit 15a and an unnecessary resin adsorption unit 15b, the resin molded product W2 and the unnecessary resin K are transported by a common transport mechanism. can be carried out at once, and the time taken for carrying them out can be shortened, and the configuration of the resin molding apparatus 100 can be simplified.

Further, in the present embodiment, during the frame opening operation, the port block 41 is raised by receiving the elastic force of the elastic member 43, and the transfer mechanism 42 raises the plunger 421 at the same time as the resin molded product W2. Since the resin molded product W2 and the unnecessary resin K are separated, it is possible to reliably separate the resin molded product W2 and the unnecessary resin K using the elastic force of the elastic member 43 compressed at the time of fastening the frame. In addition, since the plunger 421 is used to separate the resin molded product W2 from the unnecessary resin K, there is no need to increase the elastic force of the elastic member 43, and the size of the elastic member 43 is prevented. Furthermore, the size of the molds 2 and 3 and the size of the unnecessary resin K are not caused.

In addition, in this embodiment, since the unnecessary resin K is sandwiched (interposed) between the port block 41 and the upper frame 2 from the start of the frame opening operation to the completion of the gate break, Unnecessary resin K can be prevented from suddenly falling out (separating) from the port block 41 due to rebound or the like when the unnecessary resin K is separated from the resin molded product W2. In addition, since the unnecessary resin K does not come out (separate) from the port block 41 at the time of their separation, it is possible to prevent adsorption failure caused by the unnecessary resin K leaning on the port block 41 or the like. there is.

In addition to this, in the present embodiment, before the unnecessary resin adsorbing portion 15b recovers the unnecessary resin K, the transfer mechanism 42 is operated with the plunger until the elastic member 43 returns to the restored initial state. 421) is raised toward the upper frame 2, so that the port block 41 does not suddenly rise before and after contacting the adsorption portion 15b for unnecessary resin, and the unnecessary resin K can be recovered stably. there is a number

<Other modified embodiments>

In addition, this invention is not limited to the said embodiment.

For example, in the above embodiment, before separating the resin molded product W2 and the unnecessary resin K, the plunger 421 is lowered to separate the upper surface of the plunger 421 and the lower surface of the unnecessary resin K. After the resin molded product W2 and the unnecessary resin K are separated, and before the port block 41 and the unnecessary resin K are separated, the plunger 421 is lowered and the upper surface of the plunger 421 and the unnecessary resin are separated. The lower surface of (K) may be peeled off.

Further, in the above embodiment, the plunger 421 is raised when separating the resin molded product W2 and the unnecessary resin K, but the resin molded product is operated only by the elastic member 43 without raising the plunger 421. It is good also as a structure which separates (W2) and unnecessary resin (K).

In the above embodiment, although both the resin molded product W2 and the unnecessary resin K are transported by the common unloader 15, the transport mechanism for transporting the resin molded product W2 and the unnecessary resin ( It is good also as a structure which each has a conveyance mechanism which carries out K).

Further, in the above embodiment, until the resin molded product W2 and unnecessary resin K are separated, the ejector pin 61 provided on the upper frame 2 removes the resin molded product W2 from the lower frame ( Although it is set as the structure which presses toward the mold surface of 3), you may provide the pressing member which presses the resin molded product W2 to the mold surface of the lower frame 3 separately from the ejector pin 61.

Further, in the above embodiment, the cut portion 41b, the gate portion 41c, and the connecting portion 41d are formed in the port block 41, but the cut portion, the gate portion and the concave portion 2b of the upper frame 2 are formed. You may form a connection part. In this case, when the upper frame 2 and the lower frame 3 are opened, there is a possibility that the unnecessary resin K separates from the port block 41 and stays in the concave portion 2b of the upper frame 2. For this reason, you may provide the upper frame 2 with an ejector pin for removing unnecessary resin K from the frame. Further, as long as the unnecessary resin K can be connected, each of the knife portion, the gate portion, and the connecting portion may be provided on either the port block 41 or the upper frame 2. For example, a cut portion may be formed in the port block 41, a connection portion may be formed in the concave portion 2b of the upper frame 2, or a cut portion may be formed in the concave portion 2b of the upper frame 2, You may form a connection part in the port block 41.

The resin molding apparatus of the present invention is not limited to normal transfer molding, and may have a structure provided with a transfer mechanism.

In addition, it goes without saying that the present invention is not limited to the above embodiment, and various modifications are possible within a range that does not deviate (deviate) from its gist.

100... resin molding device
W1 … molding object
J... resin material
W2 … resin molding
K... resin not required
2 … 1st frame (upper frame)
2a... cavity
3 … 2nd frame (lower frame)
4 … resin injection part
41 … port block
41a... port
41b... knife
41d... connection
411... projection part
42 … transfer mechanism
421... plunger
422... fixed block
423... plunger drive
43 … elastic member
5 … framework
15 … transport mechanism
15a... Suction unit for molded products
15b... Adsorption unit for unnecessary resin

Claims (15)

A first frame in which a cavity is formed;
A second frame on which an object to be molded is placed, facing the first frame;
a frame fastening mechanism for fastening the first frame and the second frame;
a port block provided on the second frame, formed with a plurality of ports for accommodating a resin material, and having a protruding portion projecting onto a mold surface of the second frame;
a transfer mechanism having a plurality of plungers provided inside each of the plurality of ports and injecting the resin material into the cavity from the plurality of ports by moving the plurality of plungers;
In the first frame or the port block, a connection portion for connecting unnecessary resin remaining corresponding to each of the plurality of ports is formed,
The transfer mechanism moves the plurality of plungers by the same movement amount,
The port block is provided to be able to advance and retreat with respect to the second frame via an elastic member, and has a plurality of cut portions formed corresponding to each of the plurality of ports,
The plurality of knife parts and the connection part are formed on the upper surface of the port block,
After the resin material injected into the cavity is cured, the transfer mechanism lowers the plurality of plungers to separate the plungers from the unnecessary resin, and the frame clamping mechanism moves the first frame and the second frame. A frame opening operation for opening the frame is started, and the port block moves toward the first frame by receiving the restoring force of the elastic member, thereby removing the unnecessary resin between the port block and the first frame. In the sandwiched state, separating the resin molded product on the mold surface of the second mold and the unnecessary resin on the port block, and then peeling the unnecessary resin from the first mold while the pot block retains the unnecessary resin. , resin molding equipment. According to claim 1,
The connection part is to connect the unnecessary resin by connecting the knife parts adjacent to each other, the resin molding apparatus. delete According to claim 1,
The resin molding apparatus, wherein the connecting portion divides the plurality of unnecessary resins into a plurality of sets and connects them. According to claim 1,
The transfer mechanism includes a fixed block to which the plurality of plungers are fixed, and a plunger drive unit that collectively moves the plurality of plungers by moving the fixed block. According to claim 1,
Further provided with a conveying mechanism for carrying out unnecessary resin on the port block after resin molding,
The resin molding apparatus according to claim 1 , wherein the conveying mechanism has an adsorption unit for adsorbing the unnecessary resin. According to claim 6,
After the transfer mechanism brings the adsorption unit for unnecessary resin into contact with the unnecessary resin on the port block, the transfer mechanism moves the plunger toward the first frame to peel the unnecessary resin from the port block, and then, The resin molding apparatus, wherein the conveying mechanism adsorbs the unnecessary resin by the adsorbing portion for the unnecessary resin and carries out the unnecessary resin. delete According to claim 6,
The conveying mechanism has a molded product adsorption unit for adsorbing the resin molded product,
The resin molding apparatus, wherein the unnecessary resin is adsorbed by the unwanted resin adsorption unit and the resin molded product is adsorbed by the molded product adsorption unit to carry out the unnecessary resin and the resin molded product. According to claim 9,
The conveying mechanism has a moving mechanism for moving the adsorbing portion for molded products that has adsorbed the resin molded product, separating it from the port block, and moving the resin molded product outward from the protruding portion. delete delete delete According to claim 6,
the transfer mechanism moves the plunger toward the first frame until the elastic member returns to an initial state restored before the opening of the frame by the frame fastening mechanism is completed; and
The resin molding apparatus according to claim 1 , wherein the conveying mechanism brings the unnecessary resin adsorption portion into contact with the unnecessary resin on the pot block in the initial state. As a manufacturing method of a resin molded product for producing a resin molded product using the resin molding apparatus according to any one of claims 1, 2, 4 to 7, 9, 10 and 14,
A mold fastening step of fastening the first mold and the second mold to perform resin molding in a state in which an object to be molded and a resin material are supplied to the first mold and the second mold;
and a carrying out step of opening the first mold and the second mold to unload the resin molded object from the first mold and the second mold.