TW201630703A - Resin molding mold, injection molding machine and injection molding method - Google Patents

Abstract

The invention provides a resin molding mold, an injection molding machine and an injection molding method. The resin molding can be effectively performed on the hoop material via the hot runner of the resin molding mold. The resin molding mold is equipped with a first hot runner and a second hot runner in a direction vertical to the feeding direction of the hoop material. The mold is characterized in that the nozzle of the first hot runner offsets in a direction vertical to the feeding direction of the hoop material with the nozzle of the second hot runner.

Description

Injection molding machine

The present application claims priority based on Japanese Patent Application No. 2010-091660, filed on Apr. 12, 2010. The entire contents of the application are incorporated herein by reference.

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

There has been known an injection molding method which is characterized in that, when the resin portion of the resin molding die is heated and the resin portion disposed on the lead frame is held in a flowing state, the resin portion is subjected to injection molding. The N pitch of the number is matched with one cycle, and any number of n gates and cavities which are disposed at equal intervals in the resin molding predetermined portion of the lead frame are provided, and N- during the first injection molding to the N-th injection molding. The pitch feed of the first time is repeated by one feed to the N×(n-1)+1 pitch (for example, refer to Patent Document 1).

Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-253350

However, when a plurality of resin molding predetermined portions set on the hoop material are fed while the pitch of the hoop material (lead frame) is fed, resin molding is performed. In the case of the same pitch, the same number of flows of the predetermined part of the resin molding set on the line on the hoop material perpendicular to the feed direction of the hoop is provided in the direction of the resin molding die. Road nozzle.

However, with the high density of the plurality of resin molding predetermined portions set on the hoop material, that is, the molding assembly, etc., it is difficult to set it perpendicular to the hoop material in a direction perpendicular to the feeding direction of the hoop material. The same number of flow path nozzles set in the resin molding predetermined portion on the line on the hoop feed direction. In other words, if the interval between the resin molding predetermined portions in the direction perpendicular to the feeding direction of the hoop is small in the hoop material, it is required to be narrowed in the direction perpendicular to the hoop feeding direction. The interval between the nozzles of the flow path, but such a structure is sometimes difficult to realize from the limitation of the physical structure of the flow path nozzle and the portion of the flow path nozzle.

Accordingly, an object of the present invention is to provide a resin molding die, an injection molding machine, and an injection molding method which can efficiently perform resin molding on a hoop material by a hot runner.

In order to achieve the above object, according to an aspect of the invention, there is provided a resin molding die comprising a first row of hot runners and a second row of hot runners in a direction perpendicular to a feeding direction of the hoop members, The hot runner nozzle of the first row of hot runners is offset from the hot runner nozzle of the second row of hot runners in a direction perpendicular to the feed direction of the hoop material.

According to another aspect of the present invention, there is provided an injection molding method using a resin molding die which is attached to a relative hoop material The feed direction is perpendicular to the first row of hot runners and the second row of hot runners, and the hot runner nozzles of the first row of hot runners are opposite to the second row of hot runners in a direction perpendicular to the feed direction of the hooping material. The hot runner nozzle offset is characterized in that: the first injection molding step is a first resin from a hot runner nozzle of the hot runner of the first row to a line perpendicular to a feeding direction of the hoop material in the hoop material. The molding predetermined portion injects the thermoplastic resin; and the feeding step is a step of the distance between the first row hot runner and the second row hot runner in the feed direction corresponding to the hoop material after the first injection molding step The feed injection hoop material; and the second injection molding step, after the feeding step, injecting the thermoplastic resin from the hot runner nozzle of the second row hot runner to the second resin molding predetermined portion of the hoop material on the operation line .

According to the present invention, a resin molding die, an injection molding machine, and an injection molding method capable of efficiently performing resin molding on a hoop material by a hot runner are obtained.

10‧‧‧ hot runner

12‧‧‧ hot runner nozzle

20‧‧‧ hot runner

22‧‧‧ hot runner nozzle

100‧‧‧ hoop material

101-108‧‧‧Resin molding department

201-208‧‧‧ hot runner

221-228‧‧‧hot runner nozzle

600, 800, 900‧‧‧ molding machine

602‧‧ ‧ fixed mode

603‧‧‧Hoop Feeder

604‧‧‧ movable platen

606‧‧‧moving

608‧‧‧Top board

610‧‧‧E sales

612‧‧‧Top rod

620‧‧‧Fixed platen

622‧‧‧Ejector

623‧‧‧The upper end of the ball screw

624‧‧‧ toggle lever

628‧‧‧ Hollow

629‧‧‧ hollow part for ejector rod

630‧‧‧ crosshead

631‧‧‧ crosshead end

632‧‧‧ lifting rod for hoop feeder

802‧‧ ‧ fixed mode

803‧‧‧ hoop feeder

804‧‧‧Fixed platen

806‧‧‧moving

808‧‧‧Top board

810‧‧‧E sales

812‧‧‧Top rod

820‧‧‧ movable platen

822‧‧‧Ejector

823‧‧‧The upper end of the ball screw

824‧‧‧ toggle lever

828‧‧‧ hollow part

829‧‧‧ hollow part for ejector rod

830‧‧‧ crosshead

831‧‧ ‧ cross head end

832‧‧‧Pushing rod feeder

Fig. 1 (A) and (B) are views showing the structure of a single product of the hot runner 10 which can be used in the resin molding die according to the present invention.

Fig. 2(A) and Fig. 2(B) are views showing the structure of a single product of the hot runner 20 which can be used in the resin molding die according to the present invention.

Fig. 3 is a plan view showing an example of a hoop material 100 that can be used in the resin molding die according to the present invention.

Fig. 4 is a plan view showing an example of the arrangement of the hot runners in the resin molding die according to the present invention in relation to the hoop material 100.

Fig. 5 (A) to (E) are views showing an injection molding flow realized by the hot runner arrangement pattern shown in Fig. 4.

Fig. 6(A)(B) is a cross-sectional view showing the main structure of a molding machine 600 according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view showing a main section of a fixed platen 620 of the molding machine 600.

Fig. 8(A)(B) is a cross-sectional view showing the main structure of a molding machine 800 according to another embodiment of the present invention.

Fig. 9(A)(B) is a cross-sectional view showing the main configuration of a molding machine 900 according to still another embodiment of the present invention.

Hereinafter, the best mode for carrying out the invention will be described with reference to the accompanying drawings.

Fig. 1 is a view showing the structure of a single product of the hot runner 10 which can be used in the resin molding die according to the present invention. Fig. 1 shows a hot runner 10 having a single hot runner nozzle 12, Fig. 1(A) shows a top view in the axial direction of the hot runner nozzle 12, and Fig. 1(B) shows an axis including the hot runner nozzle 12. Side view to the direction. Further, when the hot runner 10 is provided in a plurality of 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-piece structure of another hot runner 20 which can be used in the resin molding die according to the present invention. Fig. 2 shows a two-column hot runner 20 having two hot runner nozzles 22, and Fig. 2(A) shows A top view of the hot runner nozzle 22 as viewed in the axial direction, and Fig. 2(B) shows a side view including the axial direction of the hot runner nozzle 22. Further, when the hot runner 20 is used, the interval L between the adjacent hot runner nozzles 22 is defined as shown in the drawing.

Further, the configuration of the hot runner to which the present invention is applied is not limited to the configuration shown in Fig. 1 or Fig. 2, and a hot runner of three or more types, such as a three-string system, may be used. Further, for example, the hot runners 20 shown in FIG. 2 may be arranged in a plurality of rows, and four or more hot runner nozzles may be arranged in one row. In the following, in order to prevent the complication of the description, the case of using the hot runner 20 shown in FIG. 2 will be described as a representative.

Fig. 3 is a plan view showing an example of a hoop material 100 that can be used in the resin molding die according to the present invention. Fig. 3 is a plan view seen in the vertical direction of the surface of the hoop material 100. In addition, the hoop material 100 is typically constructed of a metallic material.

The hoop material 100 regularly sets the resin molding predetermined portion in a checkerboard pattern along the hoop feed direction work line and the column direction work line corresponding to the feed direction of the hoop material 100. In the example shown in Fig. 3, eight resin molding predetermined portions 101 to 108 are provided on the column direction working line.

Further, the structure of the hoop material which can be used in the resin molding die according to the present invention is not limited to the structure shown in Fig. 3, as long as it is a column-direction work line in a direction perpendicular to the hoop feed direction line. The structure of two or more resin molding predetermined portions may be any configuration.

Here, the interval between the resin molding predetermined portions along the line direction of the hoop material 100 is set to Lf. That is, the interval between the resin molding predetermined portions 101, 102, the interval between the resin molding predetermined portions 102, 103, and the resin molding pre- The interval between the fixed portions 103 and 104 and the like is set to be the same as Lf. The interval Lf between the resin molding predetermined portions is generally smaller than the interval L between the above-described hot runner nozzles 22. This is due to the progress of miniaturization of the resin molding predetermined portion. Further, it is caused by the fact that it is advantageous to set a plurality of resin molding predetermined portions on one hoop material 100 as much as possible from the viewpoint of increasing the throughput, and conversely, due to the structural limitation of the hot runner nozzles 22 (especially The limitation of the relationship between the mounted heaters and the reduction of the interval L between the hot runner nozzles 22 is limited.

Here, as an example, the interval L between the hot runner nozzles 22 is set to be four times the interval Lf between the resin molding predetermined portions. That is, L=4Lf. Further, when two or more hot runner nozzles are arranged in one row (the row along the column direction work line), the interval L between the hot runner nozzles is preferably twice or three times the interval Lf between the resin molding predetermined portions. Integer multiple.

Fig. 4 is a plan view showing an example of a heat flow channel arrangement pattern in the resin molding die according to the present invention in a relationship with the hoop material 100. Fig. 4 is a plan view seen in the vertical direction of the surface of the hoop material 100.

In Fig. 4, eight hot runners 20 shown in Fig. 2 are provided. Here, the eight hot runners are respectively indicated by the symbols 201-208 from the front row side in the feeding direction of the hoop material 100, respectively. The hot runner nozzles of each of the hot runners 201-208 are indicated at 221-228, respectively.

As shown in Fig. 4, the hot runners 201-208 are arranged in a direction perpendicular to the feeding direction of the hoop material 100. That is, the hot runners 201-208 are arranged in parallel with the row direction line of the hoop material 100.

The hot runners 201-204 (the first hot runner group) are disposed in the direction in which the hoop material 100 is fed in every other hoop material 100 direction line. also That is, the hot runners 201-204 are disposed apart from each other in the feeding direction of the hoop material 100 so as to correspond to the two work lines of the row direction line of the hoop material 100. Further, the hot runners 201-204 are offset from each other in a direction perpendicular to the feeding direction of the hoop material 100 (that is, in the column direction) with one line of the hoop feed direction line of the hoop material 100 ( =Lf) Configured for the corresponding amount. That is, the hot runner 204 is offset from the hot runner 203 by a quantity corresponding to one line of the hoop feed direction line of the hoop material 100 in a direction perpendicular to the feed direction of the hoop material 100 ( In the middle direction, the hot runner 203 is disposed in the same manner as the hot runner 202 by an amount corresponding to one line of the hoop feed direction line, and the hot runner 202 is offset in the same manner as the hot runner 201. The hoop feed direction line is arranged in an amount corresponding to one line.

Similarly, the hot runners 205-208 (the second hot runner group) are disposed in the direction in which the hoop material 100 is fed in every other hoop material 100 direction line. That is, the hot runners 205-208 are disposed apart from each other in the feeding direction of the hoop material 100 by the amount corresponding to the two working lines of the row direction line of the hoop material 100. Further, the hot runners 205-208 are offset from each other in a direction perpendicular to the feeding direction of the hoop material 100 (that is, in the column direction), and correspond to one line of the hoop feed direction line of the hoop material 100. The amount is configured. That is, the hot runner 208 is offset from the hot runner 207 by a quantity corresponding to one line of the hoop feed direction line of the hoop material 100 in a direction perpendicular to the feed direction of the hoop material 100 (direction) In the middle direction, the hot runner 207 is disposed in the same manner as the hot runner 206 by an amount corresponding to one line of the hoop feed direction line, and the hot runner 206 is offset similarly to the hot runner 205. The hoop feed direction line is arranged in an amount corresponding to one line.

The hot runner 204 is disposed in an amount corresponding to the three service lines of the row of the hoop material 100 in the feed direction of the hoop material 100 with respect to the hot runner 205. The hot runner 201 and the hot runner 205 are not offset in a direction perpendicular to the feeding direction of the hoop material 100, and the hot runner 202 and the hot runner 206 are not biased in a direction perpendicular to the feeding direction of the hoop material 100. The moving, hot runner 203 and hot runner 207 are not offset in a direction perpendicular to the feeding direction of the hoop material 100, and the hot runner 204 and the hot runner 208 are not perpendicular to the feeding direction of the hoop material 100. Perform an offset. More specifically, the hot runner 201 includes two hot runner nozzles 221 that are aligned with the hoop material 100 from the upper first and fifth hoop feed direction lines in the drawing. Further, the hot runner 205 includes two hot runner nozzles 225 that are aligned with the hoop material 100 from the upper first and fifth hoop feed direction lines in the drawing. Similarly, the hot runner 202 is provided with two hot runner nozzles 222 that are aligned with the hoop material 100 from the upper second and sixth hoop feed direction lines in the drawing. Further, the hot runner 206 includes two hot runner nozzles 226 that are aligned with the hoop material 100 from the upper second and sixth hoop feed direction lines in the drawing. Similarly, the hot runner 203 includes two hot runner nozzles 223 that are aligned with the hoop material 100 from the upper third and seventh hoop feed direction lines in the drawing. Further, the hot runner 207 includes two hot runner nozzles 227 that are aligned with the hoop material 100 from the upper third and seventh hoop feed direction lines in the drawing. Similarly, the hot runner 204 is provided with two hot runner nozzles 224 that are aligned with the hoop material 100 from the upper fourth and eighth hoop feed direction lines in the drawing. Further, the hot runner 208 includes two hot runner nozzles 228 which are aligned with the hoop material 100 from the upper fourth and eighth hoop feed direction lines in the drawing.

In the example shown in Figure 4, the two pitches are shown in the figure P. The feeding direction feeds the hoop material 100. Here, the 1 pitch corresponds to the interval between the adjacent resin molding predetermined portions in the hoop material 100 in the feeding direction of the hoop material 100, and corresponds to the two work lines of the hoop material 100 in the direction of the line. the amount. That is, the hoop material 100 is fed at a pitch corresponding to the distance between adjacent hot runners in the hot runners 201-204 or 205-208.

Fig. 5 is a view showing an injection molding process realized by the hot runner arrangement pattern shown in Fig. 4. 5(A) to 5(E) show the positional relationship between the hot runner arrangement pattern and the hoop material 100 in time series, and shows a form in which resin molding is performed on each resin molding predetermined portion. In FIGS. 5(A) to 5(E), the resin molding predetermined portion on which the resin molding is performed is indicated by blackening.

In Fig. 5(A), all of the hot runner nozzles 221-228 of the respective hot runners 201-208 are simultaneously injected with thermoplastic resin to each of the hoop members 100 at positions corresponding to the hot runner nozzles 221-228, respectively. The resin molding predetermined portion performs resin molding.

Next, as shown in Fig. 5(B), two pitches are fed from the position of the hoop material 100 shown in Fig. 5(A). Further, at the position where the two pitches are fed, the thermoplastic resin is simultaneously injected from all of the hot runner nozzles 221-228 of the respective hot runners 201-208 to the hoop material at positions corresponding to the hot runner nozzles 221-228, respectively. Each of the resin molding predetermined portions on 100 performs resin molding.

Next, similarly, as shown in Fig. 5(C), two pitches are fed from the position of the hoop material 100 shown in Fig. 5(B). Further, at the position where the two pitches are fed, the thermoplastic resin is simultaneously injected from all of the hot runner nozzles 221-228 of the respective hot runners 201-208, and is corresponding to the hot runner nozzles 221-228, respectively. Resin molding is performed for each resin molding predetermined portion on the hoop material 100 at the position.

Hereinafter, similarly, as shown in FIGS. 5(D) and 5(E), the hoop material 100 feeds two pitches, and each of the hot runner nozzles 221-228 from each of the hot runners 201-208 each time. At the same time, the thermoplastic resin is injected, and resin molding is performed to each of the resin molding predetermined portions on the hoop material 100 at positions corresponding to the hot runner nozzles 221-228, respectively. Thus, the hoop material 100 is further fed with two pitches, and the thermoplastic resin is simultaneously injected from all of the hot runner nozzles 221-228 of each of the hot runners 201-208, respectively, to a position corresponding to the hot runner nozzles 221-228, respectively. Each of the resin molding predetermined portions on the hoop material 100 performs resin molding.

Here, referring to FIGS. 5(A) to 5(E), first, focusing on the column direction line P on the hoop material 100 shown in FIG. 5(A), the nematic direction line P is aligned. The resin molding form of each of the resin molding predetermined portions 101 to 108 will be described.

Each of the resin molding planned portions 101-108 on the column-direction work line P is offset from the respective hot runners 205-208 in the feeding direction of the hoop material 100 by one line of the work line of the hoop material 100. The amount. Therefore, resin molding to the respective resin molding predetermined portions 101 to 108 cannot be achieved until the hoop material 100 is fed to the position shown in Fig. 5(E). When the hoop material 100 is fed at the position shown in FIG. 5(E), the fourth and eighth resin molding predetermined portions 104 are formed from the upper portions of the resin molding predetermined portions 101-108 by the hot runner 204, 108 performs resin molding. Next, when the hoop material 100 is fed with two pitches (not shown) from the position shown in Fig. 5(E), the hot runner 203 is used to form the predetermined portions 101-108 from the top. 3 and the seventh resin molding predetermined portions 103, 107 perform resin molding. Secondly, if the hoop material 100 is fed 2 pitches (not shown), resin molding is performed from the upper second and sixth resin molding planned portions 102 and 106 to the respective resin molding predetermined portions 101 to 108 by the hot runner 202. Then, when the hoop material 100 is fed with two pitches (not shown), the first and fifth resin molding predetermined portions 101, 105 are formed from the upper portion of each of the resin molding predetermined portions 101-108 by the hot runner 201. Perform resin molding.

Thus, the resin molding of all the resin molding predetermined portions 101-108 on the nematic direction working line P is realized by the process of sequentially feeding the hoop material 100 at two pitches.

Next, referring to Figs. 5(A) to 5(E), first, focusing on the row direction line Q on the hoop material 100 shown in Fig. 5(A), on the nematic direction line Q. The resin molding form of each of the resin molding predetermined portions 101 to 108 will be described.

In the position shown in FIG. 5(A), first, resin molding is performed from the upper fourth and eighth resin molding predetermined portions 104, 108 to the respective resin molding predetermined portions 101-108 by the hot runner 208. Next, when the hoop material 100 is fed with two pitches from the position shown in Fig. 5(A) to the position shown in Fig. 5(B), the predetermined portion 101 is molded to each resin by the hot runner 207. In the 108, resin molding is performed from the third and seventh resin molding predetermined portions 103, 107 above. Next, when the hoop material 100 is fed with two pitches from the position shown in Fig. 5(B) to the position shown in Fig. 5(C), the predetermined portion 101 is molded to each resin by the hot runner 206- In the 108, resin molding is performed from the second and sixth resin molding predetermined portions 102, 106 above. Next, when the hoop material 100 is fed with two pitches from the position shown in Fig. 5(C) to the position shown in Fig. 5(D), the predetermined portion 101 is molded to each resin by the hot runner 205. 108th from the top 1st and 5th The resin molding predetermined portions 101, 105 perform resin molding. Thereafter, the hoop material 100 is further fed at two pitches, and the hoop material 100 passes under the hot runners 201-204, but during this period, the resin molding predetermined portions 101-108 on the nematic direction line Q are not performed. Resin molding. This is because each of the resin molding planned portions 101 to 108 on the column-direction work line Q is displaced from the respective hot runners 201 to 204 in the feeding direction of the hoop material 100 by one line from the line of the hoop material 100. The amount corresponding to the line.

Thus, the resin molding of all the resin molding predetermined portions 101 to 108 on the nematic direction line Q is realized by the process of sequentially feeding the hoop material 100 at two pitches.

All of the resin molding planned portions 101 to 108 on the line on the downstream side (the right side in the drawing) of the row direction work line P are in the same form as any one of the column direction lines P and Q. Resin molding is carried out by a process of feeding the hoop material 100 in order of two pitches.

Further, a plurality of work lines of the line-direction work lines which are closer to the front side (the left side in the drawing) than the column-direction work line P have a resin molding predetermined portion in which resin molding is not performed at the stage of passing through the hot runner 201. In such a portion, it is possible to use only the resin molding predetermined portion that has been subjected to resin molding, or to perform resin molding on the resin molding predetermined portion by other methods, or to abandon it. When the line of the resin molding predetermined portion that has not been subjected to resin molding at the stage of passing through the hot runner 201 is discarded, it is also possible to initially form the predetermined portion of the resin having the resin molding not performed at the stage of passing through the hot runner 201. The column direction work line is not subjected to resin molding, thereby saving the thermoplastic resin material. In addition, when the entire portion of the front row side is discarded from the column direction line P, it is also possible to start at the beginning. This portion is not subjected to resin molding, thereby saving the thermoplastic resin material. In other words, it is also possible to perform resin molding only on the line-direction work lines on the downstream side from the column direction work line P.

According to the present embodiment as described above, in particular, the following excellent effects are obtained.

As described above, even if it is not possible to arrange the number of hot runner nozzles corresponding to the number of resin molding predetermined portions 101-108 (eight in this example) in the row direction line on the hoop material 100 in one row. The same number of hot runner nozzles can be achieved by the synergistic action of the hot runners 201-204 or 205-208 offset in the hoop feed direction and the direction perpendicular thereto (column direction). In addition, the hoop material 100 is also only controlled to feed at a predetermined pitch (in this example, 2 pitches), so for example, a structure that can periodically change the feed pitch of the hoop material 100 (in the patent) Compared with the structure disclosed in Document 1, it is possible to simplify the control content.

In addition, when the hot runner width (the length of the hoop feed direction) cannot be made smaller than the interval between the adjacent resin molding predetermined portions in the hoop material 100 in the hoop feed direction, it can be as shown in FIG. 4 and The hot runners 201-204 are arranged in the form shown in Fig. 5, so that the predetermined number of the hoop members 100 are arranged in the column direction of the column after the predetermined number (in this example, from the front 15th column direction to the line P). All of the resin molding predetermined portions 101 to 108 realize resin molding. In addition, when the hot runner width (that is, the interval between adjacent hot runners in the hoop feed direction) can be equal to or less than the interval between adjacent resin molding predetermined portions in the hoop material 100 in the hoop feed direction The hot runners 201-204 can also be arranged in the hoop feed direction (not empty). In this case, change the hoop material 100 to 1 If the pitches are fed in sequence, the hot runners 205-208 can be eliminated. Alternatively, a hot runner 205 may be disposed between the hot runners 201 and 202 in the hoop feed direction, and a hot runner 206 may be disposed between the hot runners 202 and 203 in the hoop feed direction in the hoop feed direction. A hot runner 207 is disposed between the hot runners 203 and 204, and the hot runner 208 is disposed on the downstream side (not in the empty row) of the hot runner 204 in the hoop feed direction. In this case, it is possible to maintain the structure in which the hoop material 100 is sequentially fed at two pitches to maintain a high production speed.

Further, the above-described embodiment has a specific hot runner arrangement as shown in Figs. 4 and 5, but there are various types of hot runner arrays which can obtain the same effects as those of the present embodiment.

For example, in the specific hot runner arrangement shown in Figs. 4 and 5, the order in the hot runners 201-204 can be arbitrarily changed in the hoop feed direction. For example, the hot runner 201 and the hot runner 204 can be exchanged in the hoop feed direction. Similarly, the order in the hot runners 205-208 can be arbitrarily changed in the hoop feed direction.

Further, in the specific hot runner arrangement pattern shown in FIGS. 4 and 5, the configuration in which the hoop material 100 is sequentially fed at one pitch can be changed, and the hot runners 205-208 are omitted. Alternatively, in this case, the order in the hot runners 201-204 may be arbitrarily changed in the hoop feed direction. Further, in the above example, two hot runner groups are used, but three or more hot runner groups may be used. This is preferable when the hot runner width (the length of the hot runner product in the hoop feed direction) cannot be less than twice the interval between the adjacent resin molding predetermined portions in the hoop material 100 in the hoop feed direction.

In addition, the hot runner row having the same effect as the embodiment can be obtained. The column form can be, for example, the following conditions.

(1) A plurality of resin molding predetermined portions on the line in the same row direction of the hoop material 100 cooperate with a plurality of hot runners arranged offset in the hoop feed direction and the direction perpendicular thereto (column direction) to perform resin forming.

(2) The plurality of resin molding predetermined portions on the line in the same row direction of the hoop material 100 are respectively resin-formed by any one of the plurality of hot runners, and are not guided by the hot runners of the other columns. It can be set to the position where the resin can be molded.

(3) The conditions of the above (1) and (2) are met when the hoop material 100 is regularly fed at a predetermined pitch.

Further, the injection molding method based on the above-described embodiment described above, the resin molding die used in the method, and the molding machine provided with the same are suitable for the base portion of the electronic component.

Japanese Laid-Open Patent Publication No. 2009-148934 discloses a resin sealing mold for sealing a lead frame of a semiconductor chip with a resin, and sealing a part of the lead frame with a resin. The ejector pin of the lead frame after the resin sealing is released from the mold surface.

However, in order to move the ejector pin from the surface of the mold to the molded product after the resin sealing on the hoop material, since the hoop material is long in the lateral direction, deflection occurs on the hoop material. The problem.

Therefore, the structure of a molding machine capable of eliminating such a problem will be described below with reference to the drawings subsequent to Fig. 6.

Fig. 6 is a cross-sectional view (front view) showing a main structure of a molding machine 600 according to an embodiment of the present invention. The molding machine 600 of this embodiment is The vertical injection molding machine is embodied. Fig. 6(A) shows the state of molding or molding of the molding machine 600, and Fig. 6(B) shows the mold opening of the molding machine 600 or the product ejection or the hoop feeder ascending state. Fig. 7 is a cross-sectional view showing the fixed 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, an ejector rod 612, a fixed platen 620, an ejector 622, and a toggle lever 624. The crosshead 630 and the lifting rod 632 for the hoop feeder.

The movable mold 602 is fixed to the movable platen 604. The movable mold 602 is embodied as a resin molding die having a specific hot runner arrangement pattern (or other arrangement as described above) shown in Figs. 4 and 5 . However, other types of flow passages such as a cold runner may be provided on the movable mold 602, and a hot runner of a usual arrangement (not according to the above embodiment) may be provided.

The hoop feeder 603 supplies the hoop material 100 (see FIG. 3 and the like) with respect to the movable mold 602 and the stationary mold 606. The hoop feeder 603 is controlled to feed the hoop material 100, for example, at a predetermined pitch (2 pitches) after the mold opening of the molding machine 600 or the product is pushed out or the hoop feeder is raised. The hoop feeder 603 can be reciprocally supported in the mold clamping direction (upward and downward in the drawing) by a support mechanism (not shown).

The fixed mold 606 is fixed to the fixed platen 620. The die 606 is provided with an ejector plate 608 and an E pin 610 for ejecting the hoop material 100 (and the molded article formed therein). The E pin 610 is coupled to the ejector plate 608. The ejector plate 608 is reciprocally supported in the mold clamping direction 606 in the mold clamping direction (upper and lower in the drawing).

The fixed platen 620 is coupled to the toggle lever 624. The toggle lever 624 is connected to A toggle joint (not shown) is connected to the movable platen 604 by a connecting rod (not shown). The toggle lever 624 is driven by a drive mechanism (for example, an electric motor) (not shown), and moves the movable platen 604 relative to the fixed platen 620 to achieve mold clamping and mold opening. Additionally, the toggle lever 624 can be any form that includes a bell crank.

A hollow portion 628 penetrating in the feed direction of the hoop is formed on the fixed platen 620. The hollow portion 628 can be formed as a cast hole for the fixed platen 620 or as a machined hole. The hollow portion 628 is preferably formed from the viewpoint of the rigidity of the fixed platen 620 for securing a required minimum size (area of a portion of the hole in the cross section) of the movable range of the crosshead 630 to be described later.

A crosshead 630 is disposed in the hollow portion 628 of the fixed platen 620. The crosshead 630 is a member that extends in the feed direction of the hoop and is disposed to penetrate the hollow portion 628 of the fixed platen 620. The crosshead 630 has an end portion (elongation portion) 631 that is exposed from both sides of the fixed platen 620 in the hoop feed direction. The end 631 of the crosshead 630 is connected to one end (lower end) of the lifting rod 632 for the hoop feeder. The hoop feeder lifter 632 is configured to extend toward the hoop feeder 603. That is, the other end (upper end) of the hoop feeder lifting rod 632 extends to the vicinity of the lower side of the hoop feeder 603.

The ejector 622 is connected to the crosshead 630. The ejector 622 functions as a drive mechanism that drives the crosshead 630 in the mold opening and closing direction (the upper and lower directions in the drawing). The ejector 622 can include, for example, a ball screw mechanism and an electric motor. In the illustrated example, the ejector 622 is provided with a ball screw upper end portion 623 that abuts against the lower surface of the crosshead 630 (refer to FIG. 6(B)), and the Phillips head 630 is pushed by the ball screw upper end portion 623. To make the crosshead 630 in the direction of closing the mold (Upper direction in the figure) moves.

In the hollow portion 628 of the fixed platen 620, one end (lower end) of the ejector rod 612 is coupled to the crosshead 630. The ejector rod 612 is configured to extend toward 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 disposed to penetrate the fixed platen 620 in the mold opening and closing direction. For this purpose, the ejector rod hollow portion 629 penetrating in the mold opening and closing direction can be formed on the fixed platen 620. The ejector rod hollow portion 629 can be formed as a cast hole of the fixed platen 620 or as a machined hole. The ejector rod hollow portion 629 is formed to communicate with the hollow portion 628 of the pressure plate 620.

In this embodiment, if the crosshead 630 is moved in the mold closing direction by the ejector 622, the ejector rod 612 connected to the crosshead 630 moves in the mold closing direction, and at the same time, is connected to the crosshead 630. The hoop feeder is moved by the lifting rod 632 in the mold closing direction. If the ejector rod 612 moves in the mold closing direction, the end portion of the ejector rod 612 abuts against the lower surface of the ejector plate 608. If the ejector rod 612 moves further in the mold closing direction, the ejector plate 608 and the E pin 610 are ejector. Move to the closed mold direction. Thereby, the introduction of the hoop material 100 by the E pin 610 is achieved. Similarly, if the hoop feeder lifter 632 is moved in the mold closing direction, the end of the hoop feeder lifter 632 abuts against the underside of the hoop feeder 603, and if the hoop feeder is further closed to the mold by the lifter 632 When the direction is moved, the hoop feeder 603 is moved (raised) in the mold closing direction. Thereby, the movement of the hoop material 100 supported by the hoop feeder 603 in the mold closing direction is realized.

Here, it is preferable to adjust the timing at which the end portion of the ejector rod 612 abuts against the lower surface of the ejector plate 608 and the timing at which the end portion of the lifting rod 632 for the hoop feeder abuts against the lower portion of the hoop feeder 603. That is, adjusted to the hoop material 100 The amount of the ejector rod 612 that is pushed out in the mold closing direction and the amount by which the hoop material 100 is moved in the mold closing direction via the hoop feeder lifting rod 632 are the same.

Thus, in the present embodiment, the hoop material 100 is simultaneously realized by the push-out of the ejector rod 612 and the mechanical movement of the hoop material 100 via the hoop feeder lifting rod 632 to the mold closing direction.

In addition, the method of assembling the crosshead 630 is as follows: After the crosshead 630 is inserted into the hollow portion 628 of the fixed platen 620, the crosshead 630 is fastened to the ejector rod 612 with a nut. At this time, the fastening by the socket wrench and the nut fastening jig can be realized by the ejector rod hollow portion 629.

As described above, according to the molding machine 600 of the present embodiment described above, the following excellent effects are particularly obtained.

As described above, in the present embodiment, the movement of the hoop material 100 via the ejector rod 612 and the movement of the hoop material 100 via the hoop feeder lifting rod 632 in the mold closing direction are realized by the same drive, and thus can be reliably obtained. The synchronization of these actions. Thereby, the deflection of the hoop material 100 when the hoop material 100 is pushed out can be suitably prevented.

In addition, the crosshead 630 extends through the hollow portion 628 of the fixed platen 620, and the lifting function of the hoop feeder 603 is realized on both sides of the fixed platen 620. Thus, according to the present embodiment, the space for extending the crosshead 630 is ensured by vacating the hollow portion 628 of the transverse hole 620 in the fixed platen 620, so that it is not connected to the toggle lever 624 disposed in the extending direction of the crosshead 630. The crosshead 630 can be extended by the limitation of the lever member. Further, since the hollow portion 628 is formed in such a manner that the perforated surface and the perforated reverse surface are continuously (in a joined state) by the element of the fixed platen 620, the fixed platen resulting from the hollow portion 628 can be suppressed to a minimum. The rigidity of 620 is reduced. In particular, as shown in Fig. 7, the hollow portion 628 is formed to be located at the upper portion of the toggle lever 624, so that the reduction in rigidity can be further suppressed. This is because when the clamping force is applied, the upper portion of the toggle lever 624 in the fixed platen 620 is a portion where the perforated surface has a smaller amount of depression than the both sides (and instead becomes convex).

Fig. 8 is a cross-sectional view (front view) showing the main structure 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 a state in which the molding machine 800 is clamped or molded, and Fig. 8(B) shows a mold opening or product ejection of the molding machine 800 or a hoop feeder push-out state.

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, an ejector rod 812, a movable platen 820, an ejector 822, and a toggle lever 824. , the crosshead 830 and the pusher bar 832 for the hoop feeder.

Similarly, the movable platen 820 is formed with a hollow portion 828 penetrating in the feed direction of the hoop. The hollow portion 828 may be formed as a cast hole of the movable platen 820 or as a machined hole. The hollow portion 828 is formed with a required minimum size (a partial area of the hole in the cross section) for securing the movable range of the crosshead 830 to be described later.

A crosshead 830 is disposed in the hollow portion 828 of the movable platen 820. The crosshead 830 is a member that extends in the feed direction of the hoop and is disposed to penetrate the hollow portion 828 of the movable platen 820. The crosshead 830 has an end portion 831 that is exposed from both sides of the movable platen 820 in the hoop feed direction. One end (left end) of the push pin 832 for the hoop feeder is connected to the end portion 831 of the crosshead 830. Hoop feed The ejector lever 832 is configured to extend toward the hoop feeder 803. That is, the other end (right end) of the hoop feeder with the push-out lever 832 extends to the vicinity of the left side of the hoop feeder 803.

An ejector 822 is coupled to the crosshead 830. The ejector 822 functions as a drive mechanism that drives the crosshead 830 in the mold opening and closing direction (the horizontal direction in the drawing). The ejector 822 can include, for example, a ball screw mechanism and an electric motor. In the illustrated example, the ejector 822 includes a right end portion 823 of the ball screw that abuts against the left side of the crosshead 830 (refer to FIG. 8(B)), and the crosshead 830 is pushed out at the right end portion 823 of the ball screw. Thereby, the crosshead 830 is moved in the mold closing direction (the right direction in the drawing).

In the hollow portion 828 of the movable platen 820, one end (left end) of the ejector rod 812 is coupled to the crosshead 830. The ejector rod 812 is disposed to extend toward the left side of the ejector plate 808. That is, the other end (right end) of the ejector rod 812 extends to the vicinity of the left side 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 a hollow portion 829 for the ejector rod that penetrates in the mold opening and closing direction. The ejector rod hollow portion 829 may be formed as a cast hole of the movable platen 820 or as a machined 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, as in the above-described molding machine 600, the hollow portion 828 is vacated in the movable platen 820 to secure the space for extension of the crosshead 830, thereby being free from the link member of the toggle lever 824. The restriction can extend the crosshead 830. In addition, since the hollow portion 828 is formed in such a manner that the main portion of the movable platen 820 is continuous and perforated on the perforated surface and the perforated reverse surface, it can be minimized. The reduction in rigidity is suppressed to the limit. In particular, it can be formed by the hollow portion 828 so as to be adjacent to the portion of the toggle lever 824 in the mold opening and closing direction, thereby further suppressing the decrease in rigidity (refer to Fig. 7).

Fig. 9 is a cross-sectional view (bottom view) showing the main structure 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 of the molding or molding of the molding machine 900, and Fig. 9(B) shows the mold opening or product ejection of the molding machine 900 or the push-out of the hoop feeder.

The molding machine 900 of the present embodiment differs from the molding machine 800 shown in Fig. 8 in which the hoop feed direction is the longitudinal direction in that the hoop feed direction is the lateral direction. The other points are substantially the same as those of the molding machine 800 shown in Fig. 8, and the same reference numerals are attached thereto, and the description thereof is omitted. Further, when the hoop feed direction is the lateral direction, as shown in Fig. 9, the link member of the toggle lever 824 is disposed in a direction crossing the extending direction of the crosshead 830, so that the crosshead 830 is not extended. Bring big restrictions. However, the molding machine 900 of the present embodiment is also the same. Since the hollow portion 828 is formed so that the perforated surface and the perforated reverse surface are continuous as required for the movable platen 820, the reduction in rigidity can be minimized.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described above, and various modifications and substitutions may be added to the above-described embodiments without departing from the scope of the invention.

For example, in the above embodiment, the crosshead is provided as a structure that penetrates from the movable platen and pushes out the hoop material from the outside of the mold, but the present invention is not limited thereto, and for example, the space on the reverse side of the perforation of the movable platen can be used to extend The crosshead can also form a groove on the reverse side of the perforation to extend the crosshead. However, in this case When the toggle mechanism is used, since the direction in which the crosshead is extended is limited, from the viewpoint of design freedom, as in the above-described embodiment, it is preferable to provide a hollow portion in the movable platen and to extend the structure of the crosshead.

100‧‧‧ hoop material

201-208‧‧‧ hot runner

221-228‧‧‧hot runner nozzle

P‧‧‧ hoop feed direction

Claims (1)

An injection molding machine comprising a resin molding die and an ejector mechanism, comprising: an ejection mechanism that pushes a hoop material toward a mold closing direction outside the mold, and extends the ejector mechanism by The crosshead is operated in synchronization with the ejecting operation of the ejector mechanism, wherein the ejector mechanism is disposed on the fixed platen or the movable platen, and the fixed platen or the movable platen forms a hollow portion penetrating in the feeding direction of the hoop, the aforementioned The crosshead of the ejector mechanism extends through the aforementioned hollow portion.