KR20130044276A - Resin molding mold, injection molding machine and injection molding method - Google Patents

Abstract

PURPOSE: A resin molding mold, an injection molding machine, and an injection molding method are provided to maintain configuration which a hoop unit is transferred with two pitches at a time to the order and to maintain a high production speed. CONSTITUTION: An injection molding machine comprises a resin forming mold, an ejector device, and a protrusion unit. The protrusion unit protrudes a hoop unit from the outside of the mold in a closing direction. The protrusion unit extends a cross head of the ejector device and operates by synchronizing with ejector operation of the ejector device. [Reference numerals] (AA) Lines of the hoop transfer direction; (BB) Hoop transfer direction

Description

Resin molding mold, injection molding machine and injection molding method

This application claims priority based on Japanese Patent Application No. 2010-091660, filed April 12, 2010. The entire contents of that application are incorporated by reference in this specification.

The present invention relates to a resin molding die, an injection molding machine and an injection molding method.

Conventionally, in injection molding of the resin part which heats the runner part of a resin molding die, keeps a thermoplastic resin in a flow state, and arrange | positions it to a lead frame, every one pitch of N pitches which are arbitrary numbers of the resin molding plan part of a lead frame is carried out. Coincidentally, n number of gates and cavities, which are arranged at equal intervals, are provided, followed by N-1 pitch transfers during the Nth injection molding in the first injection molding, and then N × (n− An injection molding method is known which repeats 1) up to +1 pitch feed as one cycle (see Patent Document 1, for example).

Japanese Patent Publication No. 2007-253350

By the way, when resin molding is performed on a plurality of resin forming scheduled portions set on the hoop material while pitch-feeding the hoop material (lead frame), the number of resin forming scheduled portions set on a line perpendicular to the hoop conveyance direction on the hoop material is the same. It is efficient to provide a number of runner nozzles in the row direction of the resin molding die at the same pitch.

However, in accordance with the densification of the plurality of resin molding scheduled portions set on the hoop material, that is, the number of runner nozzles equal to the number of resin molding scheduled portions set on a line perpendicular to the hoop conveying direction on the hoop material, the number of runner nozzles It is becoming difficult to provide in the direction perpendicular to the direction. That is, when the space | interval between adjacent resin molding plan parts in a direction perpendicular | vertical to the hoop conveyance direction in a hoop material becomes small, it is necessary to make small space | interval between runner nozzles adjacent in the direction perpendicular | vertical to a hoop conveyance direction accordingly. However, such a configuration may be difficult due to the limitations of the physical structure of the runner nozzle and the site related thereto.

Accordingly, an object of the present invention is to provide a resin molding die, an injection molding machine, and an injection molding method capable of efficiently molding a resin onto a hoop material using a hot runner.

In order to achieve the above object, according to one aspect of the present invention, there is provided a resin molding die having a first row of hot runners and a second row of hot runners in a direction perpendicular to the conveying direction of the hoop material,

The hot runner nozzles of the first row of hot runners are offset in a direction perpendicular to the conveying direction of the hoop material with respect to the hot runner nozzles of the second row of hot runners.

According to another aspect of the present invention, the first row of hot runners and the second row of hot runners are provided in a direction perpendicular to the conveying direction of the hoop material, and the hot runner nozzles of the first row of hot runners are the hot runners of the second row. In the injection molding method using a resin molding die offset in a direction perpendicular to the conveying direction of the hoop material with respect to the hot runner nozzle of

A first injection molding step of injecting a thermoplastic resin from the hot runner nozzles of the first row of hot runners to the first resin molding scheduled portion on a line perpendicular to the conveying direction of the hoop material in the hoop material,

A transfer step for transferring the hoop material at a feed amount corresponding to the distance between the hot runners in the first row and the hot runners in the second row in the conveying direction of the hoop material after the first injection molding step;

And a second injection molding step of injecting a thermoplastic resin from the hot runner nozzles of the second row of hot runners to the second resin molding scheduled portion on the line in the hoop material after the transfer step. An injection molding method is provided.

According to the present invention, a resin molding die, an injection molding machine, and an injection molding method capable of efficiently forming a resin onto a hoop material using a hot runner can be obtained.

1 is a view showing a one-piece configuration of a hot runner 10 that can be used in a resin mold according to the present invention.
2 is a view showing a one-piece configuration of the hot runner 20 that can be used in the resin mold according to the present invention.
3 is a plan view showing an example of the hoop material 100 that can be used in the resin mold according to the present invention.
4 is a plan view showing an example of a hot runner array in the resin molding die according to the present invention in relation to the hoop material 100.
FIG. 5 is a view showing a flow of injection molding realized by the hot runner arrangement shown in FIG. 4.
6 is a cross-sectional view showing the main configuration of the molding machine 600 according to an embodiment of the present invention.
FIG. 7: is sectional drawing which shows the principal cross section of the stationary platen 620 of the molding machine 600. As shown in FIG.
8 is a cross-sectional view showing the main configuration of a molding machine 800 according to another embodiment of the present invention.
9 is a cross-sectional view showing a main configuration of a molding machine 900 according to still another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

1 is a view showing a one-piece configuration of the hot runner 10 that can be used in the resin mold according to the present invention. FIG. 1: shows the hot runner 10 provided with the single hot runner nozzle 12, and FIG. 1 (A) shows the upper surface view (viewed from the top) which looked at the axial direction of the hot runner nozzle 12. As shown in FIG. 1 (B) shows a side view (visible from the side) including the axial direction of the hot runner nozzle 12. In the case where the hot runners 10 are provided in plural rows, the interval L between the hot runner nozzles 12 of the adjacent hot runners 10 is L = l1 + l2.

FIG. 2 is a view showing a single component configuration of another hot runner 20 that can be used in the resin mold according to the present invention. FIG. 2: shows the double run type hot runner 20 provided with two hot runner nozzles 22, and FIG. 2 (A) is a top view which looked at the axial direction of the hot runner nozzle 22. As shown in FIG. 2B shows the side view including the axial direction of the hot runner nozzle 22. Here, when using this hot runner 20, the space | interval L between adjacent hot runner nozzles 22 is determined as shown.

However, the structure of the hot runner to which this invention is applied is not limited to what was shown in FIG. 1 or FIG. For example, it is also possible to arrange | position the hot runner 20 shown in FIG. 2 in multiple row shape, and to arrange | position four or more hot runner nozzles in one row. However, in the following, the case where the hot runner 20 shown in FIG. 2 is used in order to prevent the description from becoming complicated is demonstrated.

3 is a plan view showing an example of the hoop material 100 that can be used in the resin mold according to the present invention. FIG. 3 is a plan view (visible on the plane) seen in the face perpendicular direction of the hoop material 100. Here, the hoop material 100 is typically made of a metal material.

The hoop material 100 is regularly set in the shape of a tile along the hoop conveyance direction line and the row direction line corresponding to the conveyance direction of the hoop material 100. In the example shown in FIG. 3, eight resin molding plan parts 101-108 are provided on a column direction line.

However, the configuration of the hoop material which can be used in the resin molding die according to the present invention is not limited to that shown in Fig. 3, but if it has two or more resin molding scheduled portions along a column direction line which is a direction perpendicular to the hoop transfer direction line. , Any (anything).

Here, the interval between the resin molding scheduled portions along the row direction line of the hoop material 100 is referred to as Lf. That is, the interval between the resin molding scheduled parts 101 and 102, the interval between the resin molding scheduled parts 102 and 103, the interval between the resin molding scheduled parts 103 and 104, and the like are referred to as the same Lf. The interval Lf between the resin molding scheduled portions is generally smaller than the interval L between the hot runner nozzles 22 described above. This is due to the progress of miniaturization of the resin molding scheduled portion. In addition, while setting as many resin molding scheduled parts as possible on one hoop material 100 is advantageous in terms of increasing throughput, the distance L between the hot runner nozzles 22 is determined by the hot runner nozzle 22. This is due to a limitation in reducing from structural constraints (in particular, relational constraints on which a heater is mounted).

Here, as an example, the space | interval L between the hot runner nozzles 22 shall be four times the space | interval Lf between resin molding plan parts. That is, L = 4Lf. Here, when arranging two or more hot runner nozzles in one row (column along a column direction line), the space | interval L between hot runner nozzles is 2 times and 3 times the space | interval Lf between resin molding plan parts. It is preferable that it is integer multiple in the same way as double.

4 is a plan view showing an example of a hot runner array in the resin molding die according to the present invention in relation to the hoop material 100. 4 is a planar view seen in the plane perpendicular direction of the hoop material 100.

In FIG. 4, eight hot runners 20 shown in FIG. 2 are provided, and eight hot runners are coded 201-208 in order from the head side in the feed direction of the hoop material 100, respectively. Are displayed, and the hot runner nozzles of each hot runner 201-208 are represented by 221-228, respectively.

As shown in FIG. 4, the hot runners 201-208 are arranged in a direction perpendicular to the conveying direction of the hoop material 100. That is, the hot runners 201-208 are disposed in parallel to the row direction lines of the hoop material 100.

The hot runners 201-204 (the first hot runner group) are arranged in the conveying direction of the hoop material 100 with one row in the row direction line of the hoop material 100. That is, the hot runners 201-204 are arranged to be spaced apart from each other by two lines of the row direction line of the hoop material 100 in the conveying direction of the hoop material 100. Further, the hot runners 201-204 correspond to one line (= Lf) of the hoop conveyance direction line of the hoop material 100 in a direction perpendicular to the conveyance direction of the hoop material 100 (that is, in a row direction). Are offset from each other by). That is, the hot runner 204 is one line of the hoop transfer direction line of the hoop material 100 in the direction perpendicular to the transfer direction of the hoop material 100 with respect to the hot runner 203 (the lower direction in the drawing). And the hot runner 203 is disposed to offset the hot runner 202 by one line of the hoop feed direction line in a similar manner, and the hot runner 202 is arranged relative to the hot runner 201. Similarly, it is arranged offset by one line of the hoop feed direction line.

Similarly, the hot runners 205 to 208 (second hot runner group) are arranged with one row in the row direction of the hoop material 100 one by one in the conveying direction of the hoop material 100. That is, the hot runners 205-208 are arranged to be spaced apart from each other by two lines of the row direction line of the hoop material 100 in the conveying direction of the hoop material 100. The hot runners 205 to 208 are offset from each other by one line of the hoop transfer direction line of the hoop material 100 in a direction perpendicular to the transfer direction of the hoop material 100 (that is, in a row direction). Are arranged. In other words, the hot runner 208 is one line of the hoop conveyance direction line of the hoop material 100 in the direction perpendicular to the conveying direction of the hoop material 100 with respect to the hot runner 207 (the lower direction in the drawing). And the hot runner 207 is arranged offset by the hot runner 206 by one line of the hoop feed direction line in the same manner, and the hot runner 206 with respect to the hot runner 205. Similarly, it is arranged offset by one line of the hoop feed direction line.

The hot runner 204 is arranged with respect to the hot runner 205 in the conveying direction of the hoop material 100 by three lines of the row direction line of the hoop material 100. The hot runner 201 and the hot runner 205 are not offset in the direction perpendicular to the conveying direction of the hoop material 100, and the hot runner 202 and the hot runner 206 are formed of the hoop material 100. The hot runner 203 and the hot runner 207 are not offset in the direction perpendicular to the conveying direction, and the hot runner 203 and the hot runner 207 are not offset in the direction perpendicular to the conveying direction of the hoop material 100. The runner 208 is not offset in the direction perpendicular to the conveying direction of the hoop material 100. More specifically, the hot runner 201 is provided with two hot runner nozzles 221 which are positioned in the 1st and 5th hoop conveyance direction lines from the top of the figure of the hoop material 100. In addition, the hot runner 205 is provided with two hot runner nozzles 225 which are positioned in the 1st and 5th hoop conveyance direction lines from the top of the figure of the hoop material 100. Similarly, the hot runner 202 includes two hot runner nozzles 222 which are positioned in the second and sixth hoop feed direction lines from above in the hoop material 100. In addition, the hot runner 206 is provided with two hot runner nozzles 226 which are positioned in the 2nd and 6th hoop conveyance direction lines from the top of the figure of the hoop material 100. Similarly, the hot runner 203 includes two hot runner nozzles 223 positioned in the third and seventh hoop feed direction lines from above in the hoop material 100. Further, the hot runner 207 includes two hot runner nozzles 227 positioned in the third and seventh hoop transfer direction lines from above in the hoop material 100. Similarly, the hot runner 204 includes two hot runner nozzles 224 positioned in the fourth and eighth hoop feed direction lines from above in the hoop material 100. The hot runner 208 also includes two hot runner nozzles 228 positioned in the fourth and eighth hoop feed direction lines from the top of the hoop material 100.

In the example shown in FIG. 4, the hoop material 100 is conveyed by two pitches in the conveying direction indicated by P in the figure. Here, one pitch corresponds to the space | interval between the adjacent resin shaping | molding predetermined parts in the hoop material 100 in the conveyance direction of the hoop material 100, and is the line direction line of the hoop material 100. It is equivalent to two lines of. That is, the hoop material 100 is conveyed by the pitch corresponding to the distance between each adjacent hot runner in the hot runner 201-204 or 205-208.

FIG. 5 is a view showing a flow of injection molding realized by the hot runner arrangement shown in FIG. 4. 5A to 5E show the positional relationship between the hot runner array mode and the hoop material 100 in chronological order, and show an embodiment in which resin molding to each resin molding scheduled portion is performed. In Figs. 5A to 5E, the resin molding scheduled portion where the resin molding is performed is indicated in black.

In FIG. 5A, the thermoplastic resin is injected simultaneously from all the hot runner nozzles 221-228 of each hot runner 201-208, and the hoop is located at a position corresponding to each of the hot runner nozzles 221-228. Resin molding to each resin molding predetermined portion on the ash 100 is performed.

Subsequently, as shown in FIG. 5 (B), two pitches are conveyed from the position of the hoop material 100 shown in FIG. 5 (A). At this two pitch transfer position, the thermoplastic resin is injected simultaneously from all the hot runner nozzles 221-228 of the respective hot runners 201-208, corresponding to the positions of the hot runner nozzles 221-228, respectively. The resin molding to each resin molding scheduled portion on the hoop material 100 in the sheet is performed.

Subsequently, as shown in FIG. 5 (C), two pitches are conveyed from the position of the hoop material 100 shown in FIG. 5 (B). At this two pitch transfer position, the thermoplastic resin is injected simultaneously from all the hot runner nozzles 221-228 of the respective hot runners 201-208, corresponding to the positions of the hot runner nozzles 221-228, respectively. The resin molding to each resin molding scheduled portion on the hoop material 100 in the sheet is performed.

Hereinafter, similarly, as shown in FIG.5 (D) and FIG.5 (E), as the hoop material 100 is conveyed 2 pitches, every hot runner nozzle 221-of each hot runner 201-208 every time. The thermoplastic resin is injected simultaneously from 228, and resin molding to each resin forming scheduled portion on the hoop material 100 at positions corresponding to the hot runner nozzles 221 to 228 is performed. In this way, while the hoop material 100 is conveyed two pitches again, each time, thermoplastic resin is injected simultaneously from all the hot runner nozzles 221-228 of each hot runner 201-208, and the hot runner nozzle 221- Resin molding to each resin molding predetermined portion on the hoop material 100 at a position corresponding to each of 228 is performed.

Here, referring to FIG. 5 (A)-FIG. 5 (E), first, attention is paid to the column direction line P on the hoop material 100 shown in FIG. 5A, and the column direction line P The resin shaping | molding aspect to each resin shaping | molding plan part 101-108 on () is demonstrated.

Each resin molding scheduled portion 101-108 on the column direction line P is formed in the conveying direction of the hoop material 100 with respect to the hot runners 205-208. It is shifted by one line. Therefore, until the hoop material 100 is transferred to the position shown in Fig. 5E, the resin molding to the respective resin molding predetermined portions 101-108 is not realized. When the hoop material 100 is transferred to the position shown in Fig. 5E, first, the hot runner 204 first and fourth resin molding examples from the top of each resin molding scheduled portion 101-108 are used. Resin molding to the government units 104 and 108 is performed. Subsequently, when the hoop material 100 is conveyed two pitches (not shown) from the position shown in FIG. 5E, the hot runner 203 is third from the top of each resin molding scheduled portion 101-108. And resin molding to the seventh resin molding scheduled portions 103 and 107 are executed. Subsequently, when the hoop material 100 is conveyed two pitches (not shown), the second and sixth resin molding scheduled portions (from the top of each resin molding scheduled portion 101-108) by the hot runner 202 (not shown). Resin molding to 102, 106 is carried out. Subsequently, when the hoop material 100 is conveyed by two pitches (not shown), the first and fifth resin molding scheduled portions (from the top of each resin molding scheduled portion 101-108) by the hot runner 201 (not shown). Resin molding to 101 and 105 is carried out.

In this way, the resin molding for all of the resin forming schedule portions 101-108 on the column-direction line P is realized in the process in which the hoop material 100 is sequentially conveyed by two pitches.

Next, referring to FIG. 5 (A)-FIG. 5 (E), first, attention is paid to the column line Q on the hoop material 100 shown in FIG. The resin shaping | molding aspect to the resin shaping | molding plan part 101-108 is demonstrated.

At the position shown in FIG. 5 (A), first, the resin from the top to the fourth and eighth resin forming scheduled parts 104 and 108 from the respective resin forming scheduled parts 101 to 108 is applied by the hot runner 208. Molding is performed. Subsequently, when the hoop material 100 is pitched two pitches from the position shown in FIG. 5 (A) to the position shown in FIG. 5 (B), the hot runner 207 in each resin forming scheduled portion 101-108. Resin molding from the top to the third and seventh resin forming schedule parts 103 and 107 is executed. Subsequently, when the hoop material 100 is pitched two pitches from the position shown in FIG. 5 (B) to the position shown in FIG. 5 (C), the hot runner 206 is used in each of the resin forming scheduled portions 101-108. Resin molding from the top to the second and sixth resin forming schedule parts 102 and 106 is performed. Subsequently, when the hoop material 100 is pitched two pitches from the position shown in FIG. 5 (C) to the position shown in FIG. 5 (D), the hot runner 205 shows each resin forming scheduled portion 101-108. Resin molding from the top to the first and fifth resin forming schedule portions 101 and 105 is performed. Thereafter, the hoop material 100 is again conveyed by two pitches, so that the hoop material 100 passes below the hot runners 201-204, but in the meantime, each resin molding example on the thermal direction line Q is used. Resin molding to the government portions 101-108 is not performed. This means that each of the resin forming scheduled portions 101-108 on the column direction line Q is a transfer direction of the hoop material 100 with respect to each hot runner 201-204, and the column direction of the hoop material 100. This is because they are shifted by one line of the line.

In this way, the resin molding for all of the resin forming scheduled portions 101-108 on the column direction line Q is realized in the process of transferring the hoop material 100 in order of two pitches.

Hoop material in the same aspect as any one of the thermal direction lines P and Q with respect to the whole resin formation plan part 101-108 on each thermal direction line downstream from the thermal direction line P (right side of the figure). Resin molding is realized in the process in which the 100 is conveyed in sequence by two pitches.

In addition, some of each column direction line of the head side (left side in drawing) of the column direction line P has the resin molding plan part which resin molding was not performed in the step which passed the hot runner 201. As shown in FIG. This part may be used only by the resin molding scheduled portion on which resin molding has been performed, or may be used after performing resin molding on the resin molding scheduled portion by another method, or may be discarded. In the case where the thermal direction line having the resin molding scheduled portion in which the resin molding has not been performed in the step of passing the hot runner 201 is discarded, the resin molding scheduled portion in which the resin molding is not performed in the step of passing the hot runner 201 is performed. In the thermal direction line, the thermoplastic resin material may be saved by preventing resin molding from the beginning. In addition, when discarding the whole part of the head side rather than the thermal direction line P, you may make it save a thermoplastic resin material so that resin molding may not be performed from the beginning about such a part. That is, the resin molding may be performed only for each column direction line downstream from the column direction line P.

According to this embodiment mentioned above as above, especially the outstanding effect is exhibited as follows.

As described above, the number of hot runner nozzles corresponding to the number of resin forming scheduled portions 101-108 (in this example, eight) along the column line on the hoop material 100 can be arranged in one row. Even if it is not possible, the same number of hot runner nozzles can be realized in cooperation with the hot runners 201-204 or 205-208 arranged in such a manner as to be offset in the hoop conveying direction and in a direction perpendicular to the hoop conveying direction. In addition, since the hoop material 100 is also controlled to transfer only a predetermined pitch (in this example, 2 pitches), a configuration in which the pitch of the hoop material 100 is periodically varied, for example, is configured (patent disclosed in Patent Document 1). In contrast, the control contents can be simplified.

In addition, even when the width | variety (length of a hoop conveyance direction) of a hot runner cannot become smaller than the space | interval between the adjacent resin molding plan parts in the hoop material 100 in a hoop conveyance direction, FIG. 4 and FIG. By arranging the hot runners 201-204 in the aspect as shown in the figure, each row after the predetermined number of rows in the hoop material 100 (in this example, after the fifteenth row line P from the beginning). Resin molding can be realized for all of the resin molding predetermined portions 101-108 on the direction line. However, the width of the hot runner (that is, the interval between adjacent hot runners in the hoop conveying direction) may be less than or equal to the interval between adjacent resin molding scheduled portions in the hoop material 100 in the hoop conveying direction. If there is, the hot runners 201-204 may be disposed (filled without heat) in the hoop feed direction. In this case, if the hoop material 100 is changed to the configuration in which the pitches are conveyed one by one, the hot runners 205 to 208 can be made unnecessary. Alternatively, the hot runner 205 is disposed between the hot runners 201 and 202 in the hoop conveying direction, and the hot runner 206 is disposed between the hot runners 202 and 203 in the hoop conveying direction, and the hoop conveying is performed. The hot runner 207 is disposed between the hot runners 203 and 204 in the direction, and the hot runner 208 is disposed to fill the hot runner 208 downstream of the hot runner 204 in the hoop feed direction (without emptying the heat). You may also do it. In this case, it is possible to maintain a configuration in which the hoop material 100 is sequentially conveyed by two pitches, thereby maintaining a high production speed.

However, although this embodiment mentioned above relates to the specific hot runner arrangement | sequence embodiment shown in FIG. 4 and FIG. 5, the hot runner arrangement | positioning aspect which can acquire the effect similar to this embodiment is various.

For example, in the specific hot runner arrangement shown in FIGS. 4 and 5, the order in the hot runners 201-204 may be arbitrarily changed in the hoop feed direction. For example, you may arrange | position the hot runner 201 and the hot runner 204 in the hoop conveyance direction. Similarly, the order in the hot runners 205-208 may be arbitrarily changed in the hoop conveyance direction.

In addition, in the specific hot runner arrangement shown in FIG. 4 and FIG. 5, the hoop material 100 may be changed to the configuration in which the pitches are transferred one by one in order, and the hot runners 205 to 208 may be omitted. Also in this case, the order in the hot runners 201-204 may be arbitrarily changed in the hoop feed direction. In addition, although two hot runner groups are used in the above-mentioned example, you may use three or more hot runner groups. This means that the width of the hot runner (the length in the hoop conveying direction of the hot runner unit) cannot be made smaller than twice the interval between the adjacent resin molding scheduled portions in the hoop material 100 in the hoop conveying direction. Suitable for the occasion.

Here, the hot runner array mode which can acquire the effect similar to a present Example should just satisfy the following conditions, for example.

(1) A plurality of resin molding scheduled portions on the same column direction line of the hoop material 100 is resin-molded by cooperating a plurality of hot runners which are arranged offset in the hoop conveying direction and in a direction perpendicular to the hoop conveying direction.

(2) Each of the plurality of resin molding predetermined portions on the same column direction line of the hoop material 100 is resin-molded by a hot runner of any one of a plurality of rows of hot runners and resin-molded by a hot runner of another row. Not guided and set on.

(3) The conditions of (1) and (2) are satisfied when the hoop material 100 is regularly fed at predetermined pitches.

However, the injection molding method according to the above-described embodiment, the resin molding die used therein, and the molding machine having the same are suitable for manufacturing the base portion of the electronic component.

Here, Japanese Patent Laid-Open Publication No. 2009-148934 discloses a resin sealing mold for clamping a lead frame on which a semiconductor chip is mounted and then sealing a part of the lead frame with resin, wherein the lead frame after resin sealing is released from the mold surface. A resin sealing mold having an eject pin for the purpose is disclosed.

By the way, when moving the eject pin in order to mold-release a molded article after resin sealing onto a hoop material from a mold surface, since a hoop material is long horizontally, a problem arises that a hoop material arises.

So, below, the structure of the molding machine which can solve this problem is demonstrated with reference to FIG.

6 is a cross-sectional view showing the main configuration of the molding machine 600 according to one embodiment of the present invention (front view (visible from the front)). The molding machine 600 of this embodiment is embodied as a vertical injection molding machine. FIG. 6 (A) shows the state during the mold body and molding of the molding machine 600, and FIG. 6 (B) shows the mold opening, the product extrusion and the hoop feeder raised state of the molding machine 600. FIG. Indicates. 7 shows a cross-sectional view of the stationary platen 620 of the molding machine 600.

The molding machine 600 includes a movable mold 602, a hoop feeder 603, a movable platen 604, a fixed mold 606, an ejector plate 608, an E pin 610, and an ejector. A rod 612, a stationary platen 620, an ejector 622, a toggle link 624, a crosshead 630, and a lifting rod 632 for a hoop feeder are provided.

The movable mold 602 is fixed to the movable platen 604. The movable mold 602 may be embodied as a resin molding die provided with the specific hot runner array mode (or other above-described array mode) shown in FIGS. 4 and 5. However, the movable mold 602 may be provided with a runner of another type, such as a cold runner, or a hot runner of a normal arrangement mode (not related to the above-described embodiment) may be provided.

The hoop feeder 603 moves and supplies the hoop material 100 (refer FIG. 3 etc.) with respect to the movable mold 602 and the fixed mold 606. FIG. The hoop feeder 603 is controlled to transfer the hoop material 100 by, for example, predetermined pitches (2 pitches) after mold opening, product extrusion, and hoop feeder raising of the molding machine 600. The hoop feeder 603 is supported by a support mechanism (not shown) so as to reciprocate in the mold direction (up and down direction in the drawing).

The stationary mold 606 is fixed to the stationary platen 620. The stationary mold 606 is provided with an ejector plate 608 and an E pin 610 for protruding the hoop material 100 (the molded article formed thereafter). The E pin 610 is connected to the ejector plate 608. The ejector plate 608 is supported in the stationary mold 606 so as to reciprocate in the mold direction (up and down direction in the drawing).

Toggle links 624 are connected to the stationary platen 620. The toggle link 624 is connected to a toggle support (not shown), and the toggle support is connected to the movable platen 604 through a tie bar (not shown). The toggle link 624 is driven by a drive mechanism (for example, an electric motor) not shown, and the movable platen 604 is moved relative to the stationary platen 620 to realize mold and mold opening. However, the toggle link 624 may be any type including a bell crank type.

In the stationary platen 620, a hollow portion 628 penetrating in the hoop conveying direction is formed. The hollow portion 628 may be formed as a casting hole of the stationary platen 620 or may be formed as a processing hole. The hollow portion 628 is preferably, in view of the rigidity of the fixed platen 620, to a minimum size (area of the hole portion in the cross section) necessary to secure the movable range of the crosshead 630 described later. Is formed.

In the hollow portion 628 of the fixed platen 620, a crosshead 630 is provided. The crosshead 630 is a member extending in the hoop conveyance direction and is installed to penetrate the hollow portion 628 of the fixed platen 620. The crosshead 630 has an end portion (extension) 631 exposed from both sides of the fixed platen 620 in the hoop conveyance direction. One end (lower end) of the lifting rod 632 for hoop feeder is connected to an end 631 of the crosshead 630. The lifting rod 632 for the hoop feeder is disposed to extend toward the hoop feeder 603. That is, the other end (upper end) of the lifting rod 632 for hoop feeders extends to the vicinity of the lower surface of the hoop feeder 603.

The ejector 622 is connected to the crosshead 630. The ejector 622 functions as a drive mechanism for driving the crosshead 630 in the mold opening and closing direction (up and down direction in the drawing). The ejector 622 may include a ball screw mechanism and an electric motor, for example. In the illustrated example, the ejector 622 has a ball screw upper end portion 623 (see FIG. 6 (B)) that abuts against the lower surface of the crosshead 630, and the cross head 630 is provided with the ball screw upper end portion 623. The crosshead 630 is moved in the mold closing direction (upper direction in the drawing) by pushing up.

One end (lower end) of the ejector rod 612 is connected to the crosshead 630 in the hollow portion 628 of the fixed platen 620. The ejector rod 612 is disposed to extend toward the lower surface of the ejector plate 608. That is, the other end (upper end) of the ejector rod 612 extends to the vicinity of the lower surface of the ejector plate 608. The ejector rod 612 is provided to penetrate the stationary platen 620 in the mold opening and closing direction. For this purpose, the fixing platen 620 is provided with an ejector rod hollow portion 629 penetrating in the mold opening and closing direction. The ejector rod hollow portion 629 may be formed as a casting hole of the stationary platen 620 or may be formed as a processing hole. The hollow portion 629 for the ejector rod is formed to communicate with the hollow portion 628 of the fixed platen 620.

In the present embodiment, when the crosshead 630 is moved in the mold closing direction by the ejector 622, the ejector rod 612 connected to the crosshead 630 is moved in the mold closing direction, and at the same time, the crosshead 630 is moved. ), The lifting rod 632 for the hoop feeder is moved in the mold closing direction. When the ejector rod 612 is moved in the mold closing direction, the end of the ejector rod 612 abuts on the lower surface of the ejector plate 608, and when the ejector rod 612 is further moved in the mold closing direction, the ejector plate 608 and E pin 610 is moved in the mold closing direction. As a result, the protrusion of the hoop material 100 by the E pin 610 is realized. Similarly, when the hoop feeder lifting rod 632 is moved in the mold closing direction, the end of the hoop feeder lifting rod 632 contacts the lower surface of the hoop feeder 603, and the hoop feeder lifting rod 632 is in the mold closing direction. Further, the hoop feeder 603 is moved (lifted up) in the mold closing direction. Thereby, the movement in the mold closing direction of the hoop material 100 supported by the hoop feeder 603 is realized.

Here, preferably, the timing at which the end of the ejector rod 612 contacts the lower surface of the ejector plate 608 and the timing at which the end of the lifting rod 632 for hoop feeder contacts the lower surface of the hoop feeder 603 are the same. To be adjusted. That is, the protrusion amount of the hoop material 100 through the ejector rod 612 in the mold closing direction and the movement amount of the hoop material 100 in the mold closing direction through the lifting rod 632 for the hoop feeder are adjusted to be the same. do.

Thus, in this embodiment, the protrusion of the hoop material 100 through the ejector rod 612 and the movement in the mold closing direction of the hoop material 100 through the lifting rod 632 for the hoop feeder are mechanically interlocked. Are realized at the same time.

However, in the assembly method related to the crosshead 630, the crosshead 630 is inserted into the hollow portion 628 of the fixed platen 620, and then the crosshead 630 is inserted into the ejector rod 612 with a nut. Tighten. At this time, the fastening by a socket wrench and a nut fastening jig may be implemented using the hollow part 629 for ejector rods.

As mentioned above, according to the molding machine 600 of the present Example mentioned above, the outstanding effect is exhibited especially as follows.

As described above, in this embodiment, the protrusion of the hoop material 100 through the ejector rod 612 and the movement in the mold closing direction of the hoop material 100 through the lifting rod 632 for the hoop feeder are the same. Since it is realized by driving, it is possible to reliably synchronize these operations. Thereby, the curvature of the hoop material 100 at the time of protrusion of the hoop material 100 can be prevented suitably.

In addition, the crosshead 630 extends through the hollow portion 628 of the fixed platen 620, and realizes a lift up function of the hoop feeder 603 on both sides of the fixed platen 620. As described above, according to the present embodiment, the hollow plate 628 having a horizontal hole shape is formed in the fixed platen 620 to secure a space for extending the crosshead 630, thereby extending the crosshead 630 in the extending direction. The crosshead 630 may be extended without being limited by the link member of the toggle link 624 installed over. Further, the hollow portion 628 is formed so that the elements of the fixed platen 620 remain in succession (connected state) on the punch surface and the punch opposite surface, and thus the fixed platen 620 due to the hollow portion 628. The decrease in the rigidity can be minimized. In particular, as shown in FIG. 7, the hollow part 628 is formed so that it may be located in the upper part of the toggle link 624, and the fall of rigidity can further be suppressed. This is because, when the clamping force is applied, the upper portion of the toggle link 624 in the stationary platen 620 is a portion (rather convex) having a smaller depression of the punch surface than both sides.

8 is a cross-sectional view (front view) showing the main configuration of a molding machine 800 according to another embodiment of the present invention. The molding machine 800 of the present embodiment is embodied as a horizontal injection molding machine. FIG. 8 (A) shows the state during the mold body and molding of the molding machine 800, and FIG. 8 (B) shows the mold opening, the product protrusion and the hoop feeder protrusion state of the molding machine 800. FIG.

The molding machine 800 includes a fixed mold 802, a hoop feeder 803, a fixed platen 804, a movable mold 806, an ejector plate 808, an E pin 810, and an ejector. A rod 812, a movable platen 820, an ejector 822, a toggle link 824, a crosshead 830, and a protruding rod 832 for hoop feeder are provided.

Similarly, the movable platen 820 is formed with a hollow portion 828 penetrating in the hoop conveying direction. The hollow portion 828 may be formed as a casting hole of the movable platen 820 or may be formed as a processing hole. The hollow part 828 is formed with the minimum size (area of the hole part in a cross section) required for ensuring the movable range of the crosshead 830 mentioned later.

The hollow head 828 of the movable platen 820 is provided with a crosshead 830. The crosshead 830 is a member extending in the hoop conveyance direction and is installed to penetrate the hollow portion 828 of the movable platen 820. The crosshead 830 has an end portion 831 exposed from both sides of the movable platen 820 in the hoop conveyance direction. One end (left end) of the hoop feeder protruding rod 832 is connected to the end 831 of the crosshead 830. The protruding rod 832 for the hoop feeder is disposed to extend toward the hoop feeder 803. In other words, the other end (right end) of the hoop feeder protruding rod 832 extends to the vicinity of the left surface of the hoop feeder 803.

The ejector 822 is connected to the crosshead 830. The ejector 822 functions as a drive mechanism for driving the crosshead 830 in the mold opening and closing direction (left and right directions in the drawing). The ejector 822 may include, for example, a ball screw mechanism and an electric motor. In the example shown, the ejector 822 is provided with the ball screw right end part 823 (refer FIG. 8 (B)) which abuts on the left surface of the crosshead 830, and has a crosshead (823) with the ball screw right end part 823. FIG. By protruding 830, the crosshead 830 is moved in the mold closing direction (the right direction in the drawing).

One end (left end) of the ejector rod 812 is connected to the crosshead 830 in the hollow portion 828 of the movable platen 820. The ejector rod 812 is disposed to extend toward the left surface of the ejector plate 808. That is, the other end (right end) of the ejector rod 812 extends to the vicinity of the left surface of the ejector plate 808. The ejector rod 812 is provided to penetrate the movable platen 820 in the mold opening and closing direction. For this purpose, the movable platen 820 is formed with an ejector rod hollow portion 829 penetrating in the mold opening and closing direction. The ejector rod hollow portion 829 may be formed as a casting hole of the movable platen 820 or may be formed as a processing hole. The ejector rod hollow portion 829 is formed to communicate with the hollow portion 828 of the movable platen 820.

According to the molding machine 800 of the present embodiment described above, similarly to the molding machine 600 described above, by forming the hollow portion 828 in the movable platen 820 to secure the space for extending the crosshead 830, The crosshead 830 may extend without being constrained by the link members of the toggle link 824. In addition, the hollow portion 828 is formed so that the elements of the movable platen 820 remain in succession on the punch surface and the punch opposite surface, so that the decrease in rigidity can be minimized. In particular, by forming the hollow portion 828 at a portion adjacent to the toggle link 824 in the mold opening and closing direction, it is possible to further suppress the decrease in rigidity (see FIG. 7).

9 is a cross-sectional view (top view) showing the main configuration of a molding machine 900 according to still another embodiment of the present invention. The molding machine 900 of the present embodiment is embodied as a horizontal injection molding machine. FIG. 9 (A) shows the state during the mold body and molding of the molding machine 900, and FIG. 9 (B) shows the mold opening, the product protrusion and the hoop feeder projecting state of the molding machine 900. FIG.

The molding machine 900 of this embodiment differs from the molding machine 800 shown in FIG. 8 in that the hoop conveyance direction is in the lateral direction. Since other points are substantially the same as the molding machine 800 shown in FIG. 8, the same reference numerals will be used and the description thereof will be omitted. However, when the hoop feed direction is in the transverse direction, the link member of the toggle link 824 is provided over the direction crossing the direction in which the crosshead 830 extends, as shown in FIG. 9. There is no great restriction on the extension of 830. However, also in the case of the molding machine 900 of the present embodiment, the hollow portion 828 is formed in such a way that the elements of the movable platen 820 remain continuously on the punch surface and the opposite surface of the punch, so that the decrease in rigidity is minimized. It can be suppressed.

As mentioned above, although the preferable Example of this invention was described in detail, this invention is not limited to the Example mentioned above, A various deformation | transformation and substitution are possible for the above-mentioned Example, without deviating from the range of this invention. Can be.

For example, in the above-described embodiment, the crosshead is penetrated from the movable platen to protrude the hoop material from the outside of the mold. However, the present invention is not limited to this and, for example, the punch opposite surface of the movable platen is used. The crosshead may be extended using the space on the side, or a groove may be formed on the opposite side of the punch to extend the crosshead. In this case, however, when the toggle mechanism is employed, the direction of extension of the crosshead is limited. Therefore, as described in the above-described embodiment, it is possible to form a hollow portion in the movable platen to extend the crosshead. It is preferable at the point of view.

The present invention can be applied to a resin mold, an injection molding machine and an injection molding method.

10 hot runner
12 hot runner nozzle
20 hot runners
22 hot runner nozzle
100 hoop
101-108 resin molding part
201-208 Hot Runner
221-228 Hot Runner Nozzle
600, 800, 900 Molding Machine
602 Fixed Mold
603 hoop feeder
604 movable platen
606 movable mold
608 ejector plate
610 E pin
612 ejector rod
620 fixed platen
622 ejector
623 ball screw top
624 toggle links
628 hollow part
629 Hollow for ejector rod
630 crosshead
631 End of the crosshead
632 lifting rod for hoop feeder
802 Fixed Mold
803 hoop feeder
804 Fixed Platen
806 movable mold
808 ejector plate
810 E pin
812 ejector rod
820 movable platen
822 ejector
823 ball screw top
824 toggle link
828 hollow part
829 Hollow for ejector rod
830 crosshead
831 end of the crosshead
832 Extrusion Rod for Hoop Feeder

Claims (1)

An injection molding machine having a resin mold and an ejector mechanism,
And protruding means for protruding the hoop material from the outside of the mold in the mold closing direction, the protruding means being operated in synchronism with the ejector operation of the ejector mechanism by extending the crosshead of the ejector mechanism.

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