KR20220030161A - Resin molding apparatus and resin molded product manufacturing method - Google Patents

Abstract

The objective of the present invention is to obtain friction force between a pot and a plunger with high accuracy. To this end, a resin molding apparatus (100), which extrudes a resin material (J) accommodated in a pot (41a) by a plunger (421) and injects the resin material (J) into a cavity (2a), has a calculation unit (71) that calculates friction force (F) between the pot (41a) and the plunger (421) on the basis of a first weight (P1) applied to the plunger (421) when the plunger (421) being moved to an extrusion direction and a second weight (P2) applied to the plunger (421) when the plunger (421) being moved toward opposite direction of the extrusion direction.

Description

A resin molding apparatus and the manufacturing method of a resin molded article TECHNICAL FIELD

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

Conventionally, as disclosed in Patent Document 1, for example, in a semiconductor resin encapsulation apparatus in which resin in a pot is pressurized with a plunger, injected into a cavity in a mold, and resin is molded, a load cell is installed below the plunger Therefore, it is considered to determine the device abnormality and control the device by measuring the sliding resistance force at the time of rising of the plunger and comparing it with a predetermined sliding threshold.

Moreover, in patent document 1, when detecting the force applied (applied) to a plunger with a distortion gauge, the sliding resistance force at the time of rising of a plunger is measured, compared with a predetermined sliding threshold, and sliding at the time of processing of a plunger. The resistance is measured and compared with a predetermined sliding threshold to determine device anomalies and control the device.

Japanese Patent Laid-Open No. Hei 11-260844

However, in the semiconductor resin encapsulation device described above, the sliding resistance values detected at each of the rising and falling of the plunger include not only the frictional force between the port and the plunger, but also other loads applied to the plunger. In other words, in the semiconductor resin encapsulation device described above, the friction force between the port and the plunger cannot be accurately obtained.

On the other hand, the inventors of the present application measure the load of the stopped plunger in a state where no resin material is accommodated in the pot, and measure the load of the plunger when the plunger is moved up and down based on this as a reference. I am thinking of a configuration that measures frictional force.

However, in this configuration, it was found that the friction force obtained from the load when the plunger was raised and the friction force obtained from the load when the plunger was lowered had variations. This deviation is considered to be caused by, for example, stopping the lowered plunger by stopping the plunger by receiving an upward frictional force from the port. In other words, since the plunger in a stationary state is not in a state where the frictional force is zero (0), it is considered that the frictional force cannot be accurately obtained even if it is used as a reference.

Accordingly, the present invention has been made in order to solve the above problems, and its main object is to accurately obtain the friction force between the port and the plunger.

That is, the resin molding apparatus according to the present invention is a resin molding apparatus that pushes a resin material accommodated in a pot by a plunger and injects it into a cavity. When the plunger is moved in the pushing direction, the first load applied to the plunger and , Based on a second load applied to the plunger when the plunger is moved to the opposite side to the pushing direction, a calculating unit for calculating a friction force between the port and the plunger is provided.

Moreover, the manufacturing method of the resin molded article which concerns on this invention is a manufacturing method of the resin molded article using the said resin molding apparatus.

According to the present invention constituted in this way, the frictional force between the port and the plunger can be accurately calculated.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the structure of the resin molding apparatus of 1 Embodiment which concerns on this invention.
It is a schematic diagram which shows the structure of the shaping|molding module of the same embodiment.
Fig. 3 is a schematic diagram showing a configuration for realizing a friction force measurement function of the same embodiment.
It is a schematic diagram which shows the board|substrate mounting state and the resin material loading state of the shaping|molding module of the same embodiment.
5 is a schematic diagram showing a die-clamping state of the molding module of the same embodiment.
It is a schematic diagram which shows the resin injection|pouring state of the shaping|molding module of the same embodiment.
7 : is a schematic diagram which shows the reference position X of the shaping|molding module of the same embodiment.
It is a schematic diagram which shows the peeling state of the shaping|molding module of the same embodiment.
It is a schematic diagram which shows the state at the time of the frame opening operation|movement start of the shaping|molding module of the same embodiment.
It is a schematic diagram which shows the gate break operation|movement during the frame opening operation|movement of the shaping|molding module of the same embodiment.
It is a schematic diagram which shows the state after gate break during the frame opening operation|movement of the shaping|molding module of the same embodiment.
It is a schematic diagram which shows the frame-opening state of the shaping|molding module of the same embodiment.
It is a schematic diagram which shows the state which each adsorption|suction part of the unloader of the same embodiment contacted the resin molded article and unnecessary resin.
Fig. 14 is a schematic diagram showing a state in which unnecessary resin is increased and the adsorption unit for unnecessary resin is reduced in the same embodiment.
It is a schematic diagram which shows the state which the unloader of the same embodiment adsorb|sucks and carries out a resin molded article and unnecessary resin.
It is a schematic diagram which shows (a) a scraping position in a scraping operation|movement of the same embodiment, and (b) a rod position.
17 is a schematic diagram showing a measurement section of the first load P1 and the second load P2 during the cleaning operation according to 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, the resin molding apparatus of the present invention is a resin molding apparatus for injecting a resin material accommodated in a pot into a cavity by pushing it with a plunger, and a first load applied to the plunger when the plunger is moved in the pushing direction. and a calculating unit for calculating a friction force between the port and the plunger based on a second load applied to the plunger when the plunger is moved to the opposite side to the pushing direction.

In this resin molding apparatus, based on the first load applied to the plunger when the plunger is moved in the pushing direction and the second load applied to the plunger when the plunger is moved in the opposite direction to the pushing direction, the port and the plunger Since the frictional force between the two is calculated and the load of the plunger in a stationary state is not taken as a reference, the frictional force between the port and the plunger can be accurately calculated.

As a specific calculation method of the frictional force, it is conceivable that the calculating unit calculates the frictional force based on the maximum value of the first load and the minimum value of the second load.

As a more detailed method of calculating the frictional force, it is conceivable that the calculating unit calculates the frictional force based on a difference between the maximum value of the first load and the minimum value of the second load.

In order to precisely control the injection pressure of the resin material, it is preferable to provide an adjustment unit that adjusts the force for pushing the resin material by the plunger using the friction force obtained by the calculating unit.

It is preferable to include a determination unit for judging whether to operate the apparatus based on a comparison result between the friction force obtained by the calculation unit and a preset reference value.

With this configuration, for example, when it is determined that the operation of the device is impossible, the operation can be stopped at an appropriate timing and maintenance can be performed.

Some resin molding apparatuses perform a cleaning operation of scraping off the resin adhering to the inside of the pot to the outside of the pot using the plunger after resin molding.

In this case, it is preferable that the calculation unit acquires the first load and the second load during the cleaning operation.

With this configuration, it is not necessary to separately perform the operation for acquiring the first load and the second load by using the existing operation of the resin molding apparatus.

Specifically, the cleaning operation is performed by moving the plunger between a predetermined scraping position and a rod position for receiving the resin material.

In this cleaning operation, the calculating unit acquires the first load when moving the plunger from the rod position to the scraping position, and when moving the plunger from the scraping position to the rod position, the operation unit acquires the second load. 2 Acquire the load.

It is considered that the resin molding apparatus of this invention performs edge gate type transfer molding. Specifically, the resin molding apparatus of the present invention includes a first mold in which the cavity is formed, a second mold in which a resin injection part having the port and the plunger opposite to the first mold is provided, the first mold and the first mold and a mold fastening mechanism for fastening two molds, wherein the resin injection part has the port and is provided to be capable of advancing and retreating with respect to the second mold via an elastic member, the mold surface of the second mold A port block having a protrusion protruding upwardly, and a transfer mechanism having the plunger and moving the plunger to inject the resin material from the port into the cavity do.

During the mold opening operation of the mold clamping mechanism to open the first mold and the second mold, the transfer mechanism moves the plunger toward the first mold, so that the resin molded product on the mold surface of the second mold and It is preferable to separate unnecessary resin on the pot block.

With this configuration, since the unnecessary resin on the pot block is pushed toward the first frame by the plunger, it is possible to reliably separate the resin molded product from the unnecessary resin without increasing the elastic force of the elastic member for advancing and retreating the pot block. Moreover, since it is not necessary to increase the elastic force of an elastic member, enlargement of an elastic member is prevented, and by extension, an enlargement of a molding die and an enlargement of unnecessary resin are not caused.

In particular, in the present invention, since the friction force between the port and the plunger can be obtained with high precision, the force pushing the unnecessary resin by the plunger can be precisely controlled, and the operation of separating the resin molded product from the unnecessary resin using the plunger is reliably performed can do

The resin molding apparatus of the present invention includes a conveying mechanism for discharging unnecessary resin on the port block after resin molding, wherein the conveying mechanism has an unnecessary resin adsorption unit for adsorbing the unnecessary resin, wherein the conveying mechanism includes After the unnecessary resin adsorption unit is brought into contact with the unnecessary resin on the port block, the transfer mechanism moves the plunger toward the first mold to peel the unnecessary resin from the port block, and then the transfer mechanism It is preferable to adsorb|suck the said unnecessary resin by the said adsorption|suction part for unnecessary resin, and to carry out the said unnecessary resin.

With this configuration, after the adsorption unit for unnecessary resin is brought into contact with the unnecessary resin on the pot block, the plunger is moved toward the first mold to peel the unnecessary resin from the port block, and then, the unnecessary resin is removed by the adsorption unit for unnecessary resin Since it adsorb|sucks, unnecessary resin on a pot block can be collect|recovered stably.

Specifically, before the unnecessary resin is adsorbed by the unnecessary resin adsorption unit, the unnecessary resin is peeled off from the pot block by the plunger, so even if the contact area between the unnecessary resin and the port block is increased, the unnecessary resin adsorption unit The unnecessary resin adsorbed by this can be reliably recovered from the port block. In addition, when the unnecessary resin is peeled off from the pot block by the plunger, since the adsorption unit for the unnecessary resin is in contact with the unnecessary resin, it is possible to prevent a failure in adsorption caused by the inclination of the unnecessary resin on the pot block. Thereby, unnecessary resin on a pot block can be collect|recovered stably.

In particular, in the present invention, since the friction force between the pot and the plunger can be obtained accurately, the force pushing the unnecessary resin by the plunger can be precisely controlled, and the operation of peeling the unnecessary resin from the port block using the plunger is reliably performed can do

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

<One embodiment of the present invention>

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of the resin molding apparatus which concerns on this invention is demonstrated with reference to drawings. In addition, also about any figure shown below, in order to make it easy to understand, it is abbreviate|omitted or exaggerated suitably and is drawn typically. About the same component, the same code|symbol is attached|subjected and description is abbreviate|omitted suitably.

<Entire configuration of resin molding apparatus>

The resin molding apparatus 100 of this embodiment resin-molds the molding target W1 to which the electronic component Wx was connected by transfer molding using the resin material J.

Here, as the object W1 to be molded, 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, etc., whether or not wiring is present. In addition, the resin material (J) for resin molding is a composite material containing, for example, a thermosetting resin, and the form of the resin material (J) is granular, powdery, and liquid. , in the form of a sheet or tablet. The electronic component Wx connected to the upper surface of the object W1 is, for example, a bare chip or a resin-sealed chip.

Specifically, as shown in Fig. 1, the resin molding apparatus 100 includes a supply module 100A for supplying a molding object W1 and a resin material J before molding, a molding module 100B for resin molding, and , a storage module 100C for accommodating the molded object W2 (hereinafter, referred to as the resin molded article W2) after molding is provided as a component, respectively. In addition, the supply module 100A, the forming module 100B, and the receiving module 100C, for different components, can be detached from each other, and can be exchanged. Moreover, each component can also be increased, such as making the shaping|molding module 100B two or three.

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

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

As shown in Fig. 2, the molding module 100B is a first mold 2 (hereinafter, an upper mold) which is one of the molding molds in which the cavity 2a into which the resin material J is injected is formed. 2)), and a second mold 3, which is the other side of the mold, which is disposed opposite to the upper mold 2 and is provided with a resin injection part 4 for injecting the resin material J into the cavity 2a ( Hereinafter, it has a lower frame (3) and a frame fastening mechanism (5) for fastening the upper frame (2) and the lower frame (3). The upper frame 2 is held by an upper frame holder 101 , and the upper frame holder 101 is fixed to the upper platen 102 . Moreover, 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 by 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 part 4 is equipped with the port block 41 in which the port 41a which accommodates the resin material J was formed, and the transfer mechanism 42 which has the plunger 421 provided in the port 41a. . Moreover, the port 41a is formed of the cylindrical member 410 which makes 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 with respect 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 .

Moreover, at the upper end of the port block 41, the protrusion 411 which protruded (protruded out) on 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 sword portion 41b and a gate portion 41c serving as a resin flow path for introducing the resin material J injected from the port 41a into the cavity 2a are formed. Further, in the state in which the upper frame 2 and the lower frame 3 are fastened, the upper surface of the protrusion 411 contacts the upper frame 2 and the lower surface of the protrusion 411 holds the object W1 to be molded into the lower portion. It is sandwiched (interposed) between the mold surface of the frame (3).

The transfer mechanism 42 injects the resin material J into the cavity 2a from the port 41a by moving the plunger 421 in a state in which the upper frame 2 and the lower frame 3 are molded together. . Specifically, the transfer mechanism 42 includes a plunger 421 for pressure-feeding the heated and melted resin material J in the port 41a, and a plunger driving unit 422 for driving the plunger 421 . ) has

A cavity 2a is formed in the upper frame 2 to accommodate 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 sword portion 41b and the gate portion 41c and the cavity 2a of the port block 41 . A runner portion 2c for connecting them is formed. Further, although not shown, an air vent (vent hole) is formed in the upper frame 2 on the side opposite to the port block 41 . Moreover, the runner part 2c may be abbreviate|omitted and the sword part 41b and the cavity 2a can also be directly connected via the gate part 41c.

In addition, the upper mold 2 is provided with a plurality of ejector pins 61 for separating the molded object W2 after resin molding from the upper mold 2 . 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 through a required location of the upper frame 2, and are attached 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 an elastic member 63 , and has a return pin 64 . The ejector plate 62 is raised with respect to the upper frame 2 by the return pin 64 coming into contact with the outside of the mounting area of the object W1 in the lower frame 3 at the time of clamping the frame. make it As a result, the ejector pin 61 is brought into (entered into) the mold surface of the upper frame 2 at the time of clamping the frame. On the other hand, when the frame is opened, as the lower frame 3 is lowered, the ejector plate 62 is lowered with respect to the upper frame 2 , and the ejector pin 61 is caused by the elastic force of the elastic member 63 . The resin molded product (W2) is separated (released) from the upper mold (2).

And, when the upper frame 2 and the lower frame 3 are frame-fastened by the frame fastening mechanism 5, it consists of a knife part 41b, a gate part 41c, a recessed part 2b and a runner part 2c. A resin flow path communicates with the port 41a and the cavity 2a (refer to FIG. 4). In addition, when the upper frame 2 and the lower frame 3 are molded together, the port side end of the object W1 is formed 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). When the resin material J melted by the plunger 421 is injected into the cavity 2a in this state, the electronic component Wx of the object W1 is resin-sealed.

In the storage module 100C, as shown in FIG. 1 , a storage part 14 for accommodating the resin molded product W2, and a accommodating part 14 for receiving the resin molded product W2 from the molding module 100B. The conveying apparatus 15 (henceforth the unloader 15) conveyed to this is provided.

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

<Friction force measurement function between the port 41a and the plunger 421>

And the resin molding apparatus 100 of this embodiment has a function of measuring the frictional force (sliding resistance value) generated between the port 41a and the plunger 421. In addition, this frictional force calculation and measurement function is exhibited by the control part COM provided in 100A of supply module 100A, for example.

Specifically, in the resin molding apparatus 100, as shown in FIG. 3, a force sensor PS for measuring the load applied to the plunger 421 is provided, and the load obtained by the force sensor PS is used. Thus, the friction force F between the port 41a and the plunger 421 is calculated.

In this embodiment, the force sensor PS is provided between the plunger 421 and the plunger driving part 422, and it is conceivable to use a tension-compression-type load cell as a force sensor, for example. In addition, as the force sensor PS, a weight sensor, a load sensor, etc. can also be used.

Moreover, the control part COM has the calculating part 71 which calculates the frictional force F between the port 41a and the plunger 421 in the state in which the resin material J is not accommodated in the port 41a.

The calculation unit 71 includes a first load P1 applied to the plunger 421 when the plunger 421 is moved in the pushing direction (when the plunger 421 is raised), and a first load P1 applied to the plunger 421 to push the plunger 421 . The second load P2 applied to the plunger 421 when moved to the opposite side to the inner direction (when the plunger 421 is lowered) is obtained from the force sensor PS, and the obtained first load P1 and Based on the second load P2, the friction force F between the port 41a and the plunger 421 is calculated.

Specifically, the calculating unit 71 calculates the friction force F based on the maximum value P1 _max of the first load P1 and the minimum value P2 _min of the second load P2 .

Here, the maximum value P1 _max of the first load P1 is obtained from the friction force F and the load L other than the friction force (P1 _max = F+L). Here, since the plunger 421 is raised, the frictional force is a positive value.

In addition, the minimum value _P2min of the 2nd load P2 is calculated|required from the frictional force (-F) and the load L other than the frictional force ( _P2min =-F+L). Here, since the plunger 421 is lowered, the frictional force is a negative value.

Then, the calculating unit 71 is based on the difference (P1 _max -P2 _min ) between the maximum value P1 _max of the first load P1 and the minimum value P2 _min of the second load P2 by the following formula [1] , calculate the friction force F.

P1 _max -P2 _min =(F+L)-(-F+L)=2F

F=(P1 _max −P2 _min )/2 [1]

By the above, the friction force F can be calculated|required. In addition, the timing for acquiring the first load P1 and the second load P2 and the timing for acquiring the friction force F will be described later.

And the control part COM is provided with the adjustment part 72 which adjusts the force which pushes the resin material J by the plunger 421 using the frictional force F obtained by the calculating part 71.

This adjusting unit 72 controls the plunger driving unit 422 to achieve a preset injection pressure by using the friction force F obtained by the calculating unit 71 . Thereby, irrespective of the frictional force F, the injection|pouring pressure of the resin material J can be controlled to a desired value. For example, when the set value of the injection pressure is P _set , the frictional force F is influenced, and the actual injection pressure becomes P _set -F. For this reason, by controlling the plunger driving unit 422 , the adjusting unit 72 takes the frictional force F into consideration so that the pushing force of the plunger 421 becomes P _set + F.

Moreover, the control part COM is provided with the judgment part 73 which judges whether apparatus operation is possible based on the comparison result of the friction force F obtained by the calculating part 71 and a preset reference value.

This determination unit 73 compares the friction force F obtained by the calculation unit 71 with a preset reference value, and if the friction force F is equal to or greater than the reference value, for example, generates (or sends out) an alarm to promote maintenance; The resin molding apparatus 100 is stopped or the like.

<Operation of the resin molding apparatus 100>

The operation of this resin molding apparatus 100 will be briefly described with reference to Figs. 4 to 15 . 4 to 15 show only one side (left side) of the port block 41 and omit the other side (right side), in each figure, the state of the other side is the same as the state of one side. . In addition, in FIGS. 4-16, illustration of the force sensor PS is abbreviate|omitted. The following operation|movement is performed by the control part COM provided in 100A of supply modules controlling each part, for example.

As shown in Fig. 4, in a state in which the upper frame 2 and the lower frame 3 are opened, the object W1 before forming is conveyed by the loader 13 and passed to the lower frame 3, It is witty (put on it). At this time, the upper mold 2 and the lower mold 3 are heated to a temperature at which the resin material J can be melted and cured. Thereafter, the resin material J is conveyed by the loader 13 and accommodated in the port 41a of the port block 41 .

In this state, when the lower frame 3 is raised by the frame clamping mechanism 5, the port block 41 comes into contact with the upper frame 2 and descends with respect to the lower frame 3, as shown in FIG. 5 . Thus, the lower surface of the protrusion 411 is in contact with the port side end of the object W1 to be molded. Moreover, the lower surface of the upper frame 2 contacts the outer peripheral part of the shaping|molding object W1 which the protrusion part 411 does not contact. Thereby, the upper frame 2 and the lower frame 3 are frame-fastened. When the transfer mechanism 42 raises the plunger 421 by the plunger driving part 422 after this frame fastening, as shown in FIG. 6, the molten resin material J in the pot 41a passes through the resin passage. It is injected into the cavity 2a. Then, after a predetermined molding time has elapsed and the resin material J is cured in the cavity 2a, the mold clamping mechanism 5 opens the upper mold 2 and the lower mold 3 .

Here, in the resin molding apparatus 100 of the present embodiment, the resin molded product W2 and the unnecessary resin ( K) is separated (gate break operation). In addition, unnecessary resin K is resin which remained on the pot block 41 and hardened|cured.

For example, just before the above molding time elapses (before the start of the mold opening operation), the transfer mechanism 42, as shown in Fig. 7, the plunger 421 pushes the unnecessary resin K. The force is reduced to a predetermined value (for example, a force of a relatively small value such that the plunger 421 and the unnecessary resin K can maintain a contact state without peeling). Here, since the friction force F between the port 41a and the plunger 421 is accurately calculated by the calculation unit 71, the plunger 421 can accurately control the force that pushes the unnecessary resin K. can do In addition, the force that the plunger 421 pushes is measured by the force sensor PS.

And the control part COM memorize|stores the position of the plunger 421 when it became the force of the said predetermined value as the reference position X (refer FIG. 7). This reference position X is a position that serves as a reference for the gate break operation and unnecessary resin K to be separated and collected later. In addition, the reference position X is not limited to the position of the plunger 421, It is good also as a position of other members, such as a drive shaft (transfer shaft) of the plunger drive part 422 connected to the plunger 421.

And before the start of the frame opening operation, the transfer mechanism 42 lowers the plunger 421 to the side opposite to the upper frame 2, as shown in FIG. Descend to (Y). By lowering the plunger 421 to the removal position Y, the upper surface of the plunger 421 and the lower surface of the unnecessary resin K peel. After this removal operation, the transfer mechanism 42 raises the plunger 421 to the above-mentioned reference position X. At this time, the upper surface of the plunger 421 is in contact with the lower surface of the unnecessary resin K (state in Fig. 7).

Next, as shown in FIG. 9, when the frame clamping mechanism 5 starts lowering|falling of the lower frame 3, the frame opening operation|movement is started. As shown in Fig. 10, at the timing when the frame clamping mechanism 5 starts the frame opening operation and the clamping force falls to a predetermined value (different from the predetermined value in the transfer mechanism 42 described above), as shown in Fig. 10 , the transfer mechanism Reference numeral 42 raises the plunger 421 toward the upper frame 2 . Thereby, the unnecessary resin K on the pot block 41 is pushed toward the upper frame 2 by the plunger 421. In addition, 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 in the clamp shaft of the frame clamping mechanism 5, etc.

Moreover, when the transfer mechanism 42 raises the plunger 421 toward the upper frame 2, as shown in FIG. 10, the port block 41 is elastic force which is the restoring force of the compressed elastic member 43. It 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 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 by the transfer mechanism 42 . The timing at which the plunger 421 starts to rise from the lower frame 3 toward the upper frame 2 may coincide or may be different.

As shown in FIG. 11 , the mold surface of the lower frame 3 is raised by the lifting of the plunger 421 by the transfer mechanism 42 and the lifting of the port block 41 by the elastic force of the elastic member 43 . The resin molded product W2 on the upper part and the unnecessary resin K on the pot block 41 are separated (gate break).

At this time, the resin molded article W2 on the lower mold 3 is pressed toward the mold surface of the lower mold 3 by the ejector pins 61 provided on the upper mold 2, and the resin molded article ( The lower surface of W2) is in a state in close contact with the mold surface of the lower frame 3 (refer to FIG. 10). This ejector pin 61 functions as a pressing member for pressing the resin molded product W2 against the mold surface of the lower mold 3 when the resin molded product W2 and the unnecessary resin K are separated. In this way, since the resin molded product W2 is pressed against the mold surface of the lower mold 3 by the pressing member, a shear stress is likely to be applied between the resin molded product W2 and the unnecessary resin K, thereby making it easy to break the gate.

Here, the ejector pin 61 as a pressing member presses the resin molded product W2 toward the mold surface of the lower mold 3 at least until the resin molded product W2 and the 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, by the above-mentioned elevation of the port block 41 and the elevation of the plunger 421, the resin molded product W2 is Separation of the unnecessary resin (K) is completed.

In the above gate break, the unnecessary resin K is sandwiched between the upper surface of the port block 41 pushed upward by the elastic force of the elastic member 43 and the lower surface of the upper frame 2 (interposed). (See FIGS. 10 and 11 ). In other words, in the predetermined period from the start of the frame opening operation, the port block 41 sandwiches (interposes) the unnecessary resin K between the upper frame 2 and the upper frame 2 by the elastic force of the elastic member 43 . to be 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 is set so that the elastic member 43 returns to the restored initial state (the state before being pushed and compressed by the upper frame 2). This is the period until the descent.

Then, after a predetermined period has elapsed, in other words, as the frame clamping mechanism 5 lowers the lower frame 3 further, as shown in FIG. 12 , the pot block 41 releases the unnecessary resin K. The unnecessary resin (K) is peeled off from the upper frame (2) while being preserved. Here, the sword 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 Due to being larger than the contact area with , the unnecessary resin K is peeled from the upper frame 2 without peeling from the pot block 41 . Thereby, the ejector pin for contacting the unnecessary resin K and peeling the unnecessary resin K from the upper frame 2 can be made unnecessary.

In addition, as the transfer mechanism 42 raises the plunger 421 toward the upper frame 2 , the protrusion 411 of the port block 41 is formed between the mold surface of the lower frame 3 and the resin. From the state which pinched|interposed the molded article W2, it will be in a non-contact state with the resin molded article W2.

In addition, apart from the gate brake described above, the transfer mechanism 42 moves the plunger 421 into the upper frame until the elastic member 43 on the lower side of the port block 41 returns to the restored initial state before frame fastening. It rises toward (2) (refer to FIG. 12). Thereby, in the next resin molding, when the shaping|molding object W1 is mounted below the protrusion part 411, the protrusion part 411 does not become an obstacle.

After performing the above frame opening operation|movement and isolate|separating the resin molded product W2 and the unnecessary resin K, the resin molded product W2 and the unnecessary resin K are carried out by the unloader 15.

The unloader 15 has the adsorption|suction part 15a for molded articles, and the adsorption|suction part 15b for unnecessary resins, as shown in FIG. Both (both) of the molded article adsorption section 15a and the unnecessary resin adsorption section 15b are constituted by a resin adsorption pad, and in particular, the unnecessary resin adsorption section 15b is, for example, a bellows. ), which is superior in elasticity to the adsorption part 15a for molded products. Moreover, the adsorption|suction part 15a for molded articles and the adsorption|suction part 15b for unnecessary resins are provided in the base member 151, and are connected to the suction source which is not shown in figure. Moreover, at least the adsorption|suction part 15a for molded products is comprised so that movement with respect to the base member 151 is possible in the left-right direction and the up-down direction. Moreover, the unloader 15 is provided with the holding|maintenance nail|claw 152 for holding the resin molded article W2 adsorbed by the molded article adsorption|suction part 15a.

After the above-described frame opening operation is completed, the unloader 15 is introduced between the upper frame 2 and the lower frame 3 . Then, as shown in Fig. 13, the molded article adsorption portion 15a is brought into contact with the upper surface of the resin molded article W2, and the unnecessary resin adsorption portion 15b is brought into contact with the upper surface of the unnecessary resin K. .

In this state, the transfer mechanism 42 raises the plunger 421 and lifts the unnecessary resin K from the pot block 41, as shown in FIG. Here, when the unnecessary resin K has a residual portion K1 remaining in the pot 41a, the residual portion K1 is raised to such an extent that it does not interfere with the recovery of the unnecessary resin K. Thereby, the unnecessary resin K is mold-separated from the pot block 41 and closely_contact|adheres to the adsorption|suction part 15b for unnecessary resins. At this time, the adsorption|suction part 15b for unnecessary resin is elastically deformed and it is in a reduced state. Here, since the friction force F between the port 41a and the plunger 421 is accurately obtained by the calculation unit 71, the force pushing the unnecessary resin K by the plunger 421 is precisely controlled. can do

After the unnecessary resin adsorption unit 15b is reduced, the adsorption of the unnecessary resin adsorption unit 15b is started, and the unnecessary resin K is adsorbed to the unnecessary resin adsorption unit 15b. Moreover, the adsorption|suction of the adsorption|suction part 15a for molded articles is started, and the resin molded article W2 is made to adsorb|suck to the adsorption|suction part 15a for molded articles.

And, as shown in FIG. 15, the adsorption|suction part 15a for molded articles which adsorbed the resin molded article W2 is moved in the direction away from the port block 41, and the resin molded article W2 is moved out of the protrusion 411. make it Then, after raising the unloader 15, it withdraws from the upper frame 2 and the lower frame 3. As shown in FIG. Thereby, the resin molded product W2 and unnecessary resin K are carried out by the unloader 15 .

Here, the unloader 15 may have a cleaning mechanism (not shown) for cleaning the upper frame 2 and the lower frame 3 . Moreover, as a cleaning mechanism, it is conceivable to have a rotary brush and a suction unit that sucks and discharges dust.

In this case, the unloader 15 which adsorbed the resin molded article W2 and the unnecessary resin K stays between the upper mold 2 and the lower mold 3, and performs a cleaning operation|movement. In addition, during this cleaning operation, the control unit COM exerts a frictional force calculation function.

Here, first, the transfer mechanism 42 scrapes off the resin adhered in the port 41a. In other words, the transfer mechanism 42 raises the plunger 421 to a predetermined scraping-out position, as shown in FIG. Here, the predetermined scraping position is, for example, a position in which the upper surface of the plunger 421 is higher than the opening position of the port 41a.

And the transfer mechanism 42 is made to descend|fall from the predetermined|prescribed scraping-out position to the rod position for accommodating the resin material J. As shown in Fig. 17, in the lowering operation (section a) of lowering the plunger 421 from the scraping position to the load position, the calculating unit 71 performs a second operation from a force sensor PS such as a load cell. Acquire the load P2.

After that, the transfer mechanism 42 raises the plunger 421 to a predetermined scraping-out position again. Thereby, the resin adhering in the pot is scraped out of the pot 41a. 17 , in the lifting operation (section b) of raising the plunger 421 from the load position to the scraping position, the calculating unit 71 performs the first operation from a force sensor PS such as a load cell. Acquire the load P1.

Then, the upper frame 2, the lower frame 3, the pot block 41, and the plunger 421 are cleaned with the cleaning mechanism provided in the unloader 15. As shown in FIG. In addition, the calculating unit 71 calculates the friction force F by the above-mentioned formula [1] using the minimum value P2 _min of the second load P2 acquired in the section a and the maximum value P1 _max of the first load acquired in the section b. do.

In addition, in the cleaning operation, the lowering operation of descending from the scraping position to the rod position and the lifting operation of raising it from the rod position to the scraping position may be performed a plurality of times, respectively.

In addition, when the lowering operation and the raising operation of the plunger 421 are each performed a plurality of times, the second load P2 is acquired during each of the lowering operations (section a), and during each of the lifting operations (section b), You may acquire the 1st load P1. In this case, by averaging the minimum values P2 _min of the plurality of second loads P2 obtained and averaging the maximum values P1 _max of the plurality of first loads P1 obtained, the friction force F is calculated by the above-mentioned formula [1]. it is thought In addition, using the minimum value P2 _min of one second load P2 and the maximum value P1 _max of one first load P1, the friction force F is calculated by the above-mentioned formula [1], and the plurality of may be averaged by the friction force F of Alternatively, when the frictional force F obtained by one up and down movement is equal to or greater than a predetermined value, it may be configured such that it is determined whether or not to move the plunger 421 up and down again.

After the above cleaning operation is finished, the unloader 15 is withdrawn from the upper mold 2 and the lower mold 3, and the resin molded product W2 and the unnecessary resin K are unloaded.

In addition, the frictional force F calculated by the calculating part 71 in the cleaning operation is transmitted to the adjusting part 72 . And the adjustment part 72 controls the plunger drive part 422 so that the injection pressure of the resin material J may become a predetermined setting value using the calculated frictional force F in the next resin molding.

In addition, the friction force F calculated by the calculating unit 71 in the cleaning operation is transmitted to the determining unit 73 . Then, the determination unit 73 compares the calculated frictional force F with a preset reference value, and if the frictional force is equal to or greater than the reference value, for example, generates (or sends out) an alarm for prompting maintenance, or the resin molding apparatus 100 ) to stop or

<Effect of this embodiment>

According to the resin molding apparatus 100 of the present embodiment, the first load P1 applied to the plunger 421 when the plunger 421 is raised, and the first load P1 applied to the plunger 421 when the plunger 421 is lowered. Based on the second load P2, the friction force F between the port 41a and the plunger 421 is calculated, and since the load of the plunger in a stationary state is not a reference, the port 41a and the plunger 421 The friction force F between the two can be obtained with high precision.

Moreover, since the first load P1 and the second load P2 are acquired during the cleaning operation after resin molding, the existing operation of the resin molding apparatus 100 can be used, and the first load P1 and the second load P1 and the second load P2 are obtained. There is no need to separately perform an operation for acquiring the load P2.

<Other modified embodiments>

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

In the above embodiment, although the first load P1 and the second load P2 are acquired during the cleaning operation to calculate the friction force F, the first load P1 and the second load P2 at timings other than the cleaning operation ) may be obtained and the friction force F may be calculated. For example, before the resin material J is accommodated in the port 41a, the plunger 421 may be raised/lowered, the 1st load P1 and the 2nd load P2 may be acquired, and the friction force F may be calculated.

In addition, the range for raising/lowering the plunger 421 is not limited between the scraping position and the rod position as in the said embodiment, For example, between the injection completion position where injection of the resin material J is completed, and the rod position, etc. , can be set appropriately.

In addition, the calculating part 71 of the said embodiment calculates|requires the friction force F using the maximum value P1 _max of the 1st load P1 and the minimum value P2 _min of the 2nd load P2, but in the 1st load P1 Friction force F may be calculated|required using values other than the maximum value P1 _max of , and values other than the minimum value P2 _min in the second load P2. Further, the friction force F may be obtained using the average value of the section a of the first load P1 and the average value of the section b of the second load P2.

Although the resin molding apparatus of the said embodiment performed edge gate type transfer molding because the port block 41 has the protrusion part 411, the side gate type transfer molding may be performed.

The resin molding apparatus of the present invention is not limited to normal transfer molding, and any configuration provided with a transfer mechanism may be sufficient.

In addition, it cannot be overemphasized that this invention is not limited to the said embodiment, and various deformation|transformation is possible in the range which does not deviate from the meaning.

100… resin molding equipment
W1 … molded object
J … resin material
W2 … resin molded product
K … unnecessary resin
2 … 1st frame (upper frame)
2a … cavity
3 … 2nd frame (lower frame)
4 … resin injection part
41 … port block
41a… port
411… projection part
42 … transfer mechanism
421… plunger
43 … elastic member
5 … frame fastener
15 … conveyance mechanism
15b… Adsorption part for unnecessary resin
71 … operation part
72 … coordinator
73 … judging unit

Claims (11)

A resin molding apparatus for injecting a resin material accommodated in a pot into a cavity by pushing it with a plunger,
Based on the first load applied to the plunger when the plunger is moved in the pushing direction and the second load applied to the plunger when the plunger is moved to the opposite side to the pushing direction, the port and the A resin molding apparatus comprising a calculating unit for calculating frictional force between plungers. The method of claim 1,
The calculation unit, based on the maximum value of the first load and the minimum value of the second load, calculates the friction force, the resin molding apparatus. 3. The method of claim 1 or 2,
wherein the calculating unit calculates the frictional force based on a difference between a maximum value of the first load and a minimum value of the second load. 4. The method according to any one of claims 1 to 3,
and an adjustment unit configured to adjust the force for pushing the resin material by the plunger using the friction force obtained by the calculating unit. 5. The method according to any one of claims 1 to 4,
and a judging unit for judging whether to operate the apparatus based on a comparison result of the friction force obtained by the calculating unit and a preset reference value. 6. The method according to any one of claims 1 to 5,
To perform a cleaning operation to scrape the resin adhered in the port to the outside of the port using the plunger,
and the calculating unit acquires the first load and the second load during the cleaning operation. 7. The method of claim 6,
the cleaning operation is performed by moving the plunger between a predetermined scraping position of the plunger and a rod position for receiving the resin material;
wherein the calculating unit acquires the first load when moving the plunger from the rod position to the scraping position, and acquiring the second load when moving the plunger from the scraping position to the rod position, resin molding equipment. 8. The method according to any one of claims 1 to 7,
a first frame in which the cavity is formed;
a second frame provided with a resin injection unit having the port and the plunger opposite the first frame;
and a frame fastening mechanism for fastening the first frame and the second frame;
The resin injection unit,
A port block in which the port is formed and provided to be capable of advancing and retreating with respect to the second frame through an elastic member, the port block having a protrusion protruding onto the mold surface of the second frame;
and a transfer mechanism having the plunger and moving the plunger to inject the resin material into the cavity from the port. 9. The method of claim 8,
During the frame opening operation of the frame clamping mechanism to open 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 A resin molding apparatus which separates the resin molded article on the top and the unnecessary resin on the pot block. 10. The method according to claim 8 or 9,
A conveying mechanism for discharging unnecessary resin on the pot block after resin molding is provided;
the conveying mechanism has an adsorption unit for unnecessary resin for adsorbing the unnecessary resin;
After the conveying mechanism brings the unnecessary resin adsorption unit into contact with the unnecessary resin on the port block, the transfer mechanism moves the plunger toward the first mold to peel the unnecessary resin from the port block, and thereafter, The resin molding apparatus in which the said conveyance mechanism adsorb|sucks the said unnecessary resin by the said adsorption|suction part for unnecessary resins, and carries out the said unnecessary resin. The manufacturing method of the resin molded article using the resin molding apparatus in any one of Claims 1-10.

Images