JP2009029119A - Press molding composite type molding method, its apparatus, and metal resin molded article molded by them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable next process of bending, etc. by a press molding machine by utilizing a part of a metal and a resin to be processed as a jointing material in the case of molding a metal resin product. <P>SOLUTION: In a method of molding a metal resin molded article by integrating the metal and the resin, the press molding composite type molding method is conducted by resin molding the metal, and then molding only the resin in a bridge state by press processing and/or mold processing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a press-mold composite mold forming method and apparatus for forming a metal resin molded product, and a metal resin molded product molded by them, for example, a large number of metals from one end of a chip-shaped resin portion. It is suitable for molding a metal resin molded product such as a connector with terminal pins in which terminal pins are arranged in parallel and a large number of terminal pins bent horizontally from the other end are arranged in parallel.

  Conventionally, in the hoop molding, in order to manufacture a metal resin molded product in which a metal and a resin are integrated in a molding process by continuous processing, first, as shown in FIG. 4, the metal plate M is wound into a hoop-like state. The metal plate M is pulled out from the supply reel L in a tensile state, inserted into the press die of the press molding machine P1, punched out, and once wound into a hoop shape in the A zone, Separately, the punched semi-finished metal plate M is inserted into the resin mold of the resin molding machine Q, the resin is molded into a predetermined location and integrated, and further wound into a hoop shape in the B zone. Separately, it is inserted into a press die of a press molding machine P2 in a later process and processed, and cut from the metal plate M to be a final molded product.

  Moreover, as disclosed in Patent Document 1, there is an insert molding method and an insert molding apparatus that integrally process a metal and a resin. In other words, this is a mold that performs press molding and resin molding on a metal insert member that is continuously transferred and supplied, cuts a predetermined section and continuously molds insert molded products one after another. The pressing and cutting are performed by an opening / closing part integrated with a mold that opens and closes in conjunction with the opening / closing operation.

The mold that opens and closes is provided with a resin molding portion that performs resin molding on the insert member that is continuously transferred and supplied from one side to the other side, and at least the resin molding portion is pressed on the upstream side in the transfer direction of the insert member. A processing part is provided, and a cutting part is provided on the downstream side in the transfer direction. A predetermined position of the insert member is resin-molded by the resin molding part by opening and closing operations of the molding die, and the other predetermined positions are simultaneously pressed by the pressing part. In addition, the other predetermined positions are cut at the same time by the cutting portion, and the insert molded products that have been pressed by opening and closing the mold and transferring the insert members are cut and discharged one after another.
Japanese Patent Publication No. 8-2557

  However, conventionally, in order to transfer the product, the metal plate is sent out with a part of the connection (metal bridge), and the metal bridge needs to be connected until the final process. Due to the connection by the metal bridge, for example, there are problems such as the restriction of the bending position of the metal part and the occurrence of a processing step on the cut surface of the metal bridge. Also in the technique of Patent Document 1, a product is formed by holding the product together with a metal bridge and sequentially sending the insert member to the press-worked part, the resin mold part, and the cutting part. Moreover, the insert molding apparatus according to the technique of Patent Document 1 has a problem that it is very complicated and expensive in structure.

  Therefore, the present invention was created in view of various circumstances that existed in the past, and after resin molding, the connection for transferring products is changed from a metal bridge to a resin bridge formed at the time of resin molding. Thus, the metal bridge can be cut at the stage of the intermediate process. For example, when molding various metal resin products such as connectors with terminal pins, by using a part of the processed resin as a connecting material, there is no restriction on the bending position of the metal part, and even a small metal resin. It is an object of the present invention to provide a press-mold composite mold forming method and apparatus capable of forming a product, and a metal resin molded product formed by them.

  In order to solve the above-described problems, in the present invention, in a method of forming a metal resin molded product by integrating a metal and a resin, after resin molding to metal, a pressing process is performed as a bridge state of resin only. It is characterized by a press-mold composite mold forming method for forming by molding.

  Further, the present invention is characterized by a press-mold composite mold forming method in which a metal resin molded product is formed by processing a metal edge portion in a bridge state of resin only.

  Furthermore, the present invention is characterized by a press-mold composite mold forming method for taking out a metal resin molded article by cutting a resin bridge portion that supports the metal resin molded article in a resin-only bridge state.

  Further, the present invention is characterized by a press-mold composite mold forming method for removing the resin piece of the resin bridge portion left on the metal after cutting the resin bridge portion.

  Furthermore, the resin bridge portion is characterized by a press-mold composite molding method in which ribs are provided.

  Further, the present invention is characterized by a press-mold composite molding method in which a predetermined cooling idle time is set in order to cool the resin bridge portion.

  Further, the present invention is characterized by a press-mold composite mold forming method in which press processing to metal and resin mold processing are simultaneously performed with a single mold.

  Further, the present invention is characterized by a press-mold composite molding method in which press processing to metal and resin mold processing are continuously performed by hoop molding.

  Furthermore, in an apparatus for forming a metal resin molded product by integrating a metal and a resin, a resin that molds and integrates the metal with the resin in a state in which the metal is processed with a press portion that bridges the metal with the resin alone The present invention is characterized by a press-mold composite molding apparatus provided with a mold forming section.

  Further, the present invention is characterized by a press / mold combined mold forming apparatus provided on the upstream side and the downstream side in the metal transfer direction with the press part interposed between the resin mold forming parts.

  Further, the present invention is characterized by a press / mold combined mold forming apparatus provided with a resin material injection hole at the center of the mold where the resin mold forming section is arranged.

Further, the present invention is characterized by a press / mold combined mold forming apparatus provided with a temperature controller for adjusting the temperature of the entire mold including the resin mold forming section.

Further, the present invention is characterized by a press / mold combined mold forming apparatus provided with a hot runner controller for preventing the occurrence of runners in the resin mold forming section.

  Further, the present invention is characterized by a metal resin molded product molded by the press-mold composite mold forming method or the press-mold composite mold forming apparatus.

  According to the present invention, for example, when molding various metal resin molded products such as connectors with terminal pins, by using a part of the processed resin as a connecting material, the metal portion at the time of press processing in the next process is used. There is no restriction on the processing position, and a small metal resin product can be formed.

  That is, the present invention relates to a method of forming a metal resin molded product by integrating a metal and a resin, and after a resin molding process on the metal, a bridge state of only the resin with respect to the metal is performed. Since it was formed by processing, it became possible to eliminate the restriction of the processing position of the metal part.

  In addition, by setting the resin-only bridge state after the resin molding, it is possible to perform various processes such as bending, twisting, and crushing on the metal part that is not resin-molded, for example.

  Furthermore, after completing the metal resin molded product in a state of being bridged only with the resin, it is possible to obtain the molded product by cutting the resin bridge portion.

  Further, by removing the resin piece left on a part of the metal plate from the metal plate, the metal plate can be reused without any resin mixing.

  Furthermore, since the portion is reinforced by forming a rib such as providing an uneven shape or a protrusion on the resin bridge portion, bending, twisting, crushing, punching processing, etc. at the time of transferring the molded product or in the next process, etc. Therefore, even if a load is generated on the molded product, it is possible to prevent the molded product from falling off the metal plate.

  In addition, as described above, the resin bridge portion will be cut, but if the resin bridge molding step and the resin bridge cutting step are performed continuously, there is a possibility that cutting will be performed before the resin is cured, By setting the cooling idling time, it was possible to suppress the deformation of the cut surface, processing steps, etc., and to shorten the cycle time.

  Furthermore, since the metal and the resin are integrated by simultaneously performing the pressing process on the metal and the molding process of the resin with a single mold, the accuracy of the processing position is greatly improved and the working efficiency is improved. It became possible.

  In addition, the metal and the resin can be integrated by continuously performing the pressing process on the metal and the molding process of the resin by the hoop molding, and the working efficiency can be improved.

  Further, it is a press-mold composite molding apparatus for molding a metal resin molded product obtained by integrating a metal and a resin, and the inserted metal is bridged to the metal only by the resin, for example, punching Since processing such as bending, twisting and crushing is performed, restrictions on the processing position of the metal part can be eliminated, and a small and precise product can be manufactured.

  In addition, the first press part arranged on the upstream side in the transfer direction, the resin mold forming part integrated with the resin in a state of being resin bridged to the metal, the metal bending as a bridge state of only the resin by punching the metal bridge, Since the second press part arranged downstream in the transfer direction so as to perform processing such as twisting and crushing is provided, it is possible to improve the work efficiency.

  Furthermore, since the resin material injection hole is provided at the center of the mold where the resin mold molding section is arranged, the balance of the entire mold can be obtained, so that each of the first press and the second press section on the left and right sides of the mold can be obtained. It became possible to balance the pressure load during the press operation.

  In addition, since it has a temperature controller for adjusting the temperature of the entire mold including the resin mold molding part, it is possible to prevent the occurrence of thermal distortion such as expansion due to the heat of the metal, and the metal can be processed with the resin mold. It became possible to set the temperature appropriately.

  Furthermore, since a hot runner controller for preventing the runner from being generated in the resin molding part is provided, it is not necessary to remove the runner from the mold, and the processing speed can be improved.

  In addition, the metal resin molded product by the above-described process and apparatus has extremely high processing accuracy, enables complicated processing, and makes it possible to obtain a more inexpensive molded product.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In the press-mold composite molding apparatus according to the present invention, for example, a large number of metal terminal pins are arranged in parallel from one end of a chip-shaped resin portion, and a large number of terminal pins that are bent horizontally from the other end are arranged in parallel. A metal resin molded product such as a connector with terminal pins (hereinafter simply referred to as a molded product) is continuously molded by a hoop molding process.

  As shown in FIG. 1, the apparatus is formed by inserting a supply reel L in which a metal plate M is wound in a hoop-like state, and inserting the metal plate M drawn from the supply reel L with a metal plate feeding device. Composite mold molding machine P, resin dryer T provided with a transport roller for feeding a resin material into the composite mold molding machine P, temperature controller for adjusting the temperature of the entire mold of the composite mold molding machine P V, and a hot runner controller H for preventing runner generation in the composite molding machine P.

As shown in FIGS. 2 (a) and 2 (b), the composite mold molding machine P is arranged such that the upper movable die 2 is movable up and down with respect to the lower fixed die 1. The metal plate M is intermittently moved between the upper and lower dies 1 and 2 in accordance with the raising / lowering timing. On the mutually opposing surfaces of these dies 1 and 2, the press part 3 on the upstream side in the transfer direction of the metal plate M with respect to the resin mold part 5, the central resin mold part 5, and the resin mold part 5. On the other hand, each of the press portions 4 on the downstream side in the transfer direction of the metal plate M is gathered into a single mold that operates integrally during the press-molding process while being fixed in contact with the same plane. Yes.
The metal plate M is pressed and resin-molded by the upper and lower dies 1 and 2 at predetermined intervals in the longitudinal direction so that a plurality of molded products are continuously processed and formed. Therefore, as shown in FIG. 2B, a metal plate feeding device 6 for supplying the metal plate M into the mold with an arbitrarily settable length is incorporated. The metal plate feeding device 6 operates using air as a drive source, the feeding timing is controlled by a signal (voltage) from the molding machine P, and the metal plate M is intermittently moved from the left side of FIG. Sent out.

  Further, the center of the movable die 2 is provided with a resin material injection hole 8 that communicates from the resin material filling device 7 provided on the upper side of the composite mold molding machine P to the resin mold forming section 5, and the resin material filling device 7 It is connected to the resin dryer T. In conjunction with the downward movement of the movable die 2, the resin material is injected from the resin material injection hole 8 into the resin mold forming portion 5 and is integrally molded with the metal plate M.

  Next, an example of a molding method of a metal resin molded product by the composite molding apparatus for the best configuration configured as described above will be described. The process by this apparatus is performed based on the hoop forming process. The metal plate M is punched and bent by the first press part 3, the resin is molded by the central resin mold part 5, and the second press part 4. It consists of press working processes such as metal extraction and bending.

  As shown in FIG. 3, in the first press portion 3 on the upstream side in the transfer direction of the metal plate M, various processes such as punching, bending, twisting, and crushing are performed on the metal plate M. In this embodiment, first, when the metal plate M is transferred, holes 9 for determining a preset feed amount are formed on the opposite edge sides of the metal plate M in the short direction. The metal plate M is first punched 10 to obtain the shape of the molded product. At the same time, in order to improve the adhesion between the metal plate M and the resin when forming the resin bridge in the next step, the adhesion processing portion 11 such as a small hole is formed. As the above-mentioned close-contact processed portion 11, a member having an appropriate shape such as a concave portion and a notch is selected in addition to the small hole.

  The metal plate M is further subjected to a second punching process 12 for producing a molded product, and a part thereof connects the metal plate M and the molded product as a metal bridge 13. Thereafter, various processes such as bending, twisting and crushing are performed to obtain the shape of the molded product. In this embodiment, the right-angle bending process 14 is used. Further, a third punching process 15 is performed on a part of the metal bridge 13.

  After various processing steps for the metal part only, a resin is molded into a molded part of the metal part. At that time, the adhesion processing portion 11 in the previous step formed on the metal plate M is firmly integrated with the metal plate M so as to be covered with the resin, thereby forming the resin bridge 16. For example, if it is a small hole of a present Example, the resin layer which penetrated the front and back of the metal plate M will be formed. As a result, a molded product made of metal and resin and the resin bridge 16 are formed. In this step, the metal bridge 13 and the resin bridge 16 coexist.

  Further, as shown in FIG. 3 (d), the resin bridge 16 is reinforced by providing uneven portions or protrusion-like ribs 17, and the molded product is formed from the metal plate M during the manufacturing process. Make sure that it does not fall out.

  In the above process, the temperature controller V is operated to warm the entire mold with circulating hot water or the like so as to match the resin molding. For example, for nylon or the like, warm water of about 80 ° C. is used. Thereby, even if the resin mold is thick, the resin processing can be performed in about 3 to 10 seconds. Immediately after the resin molding step or by providing an idling step 18, a cooling time for the resin portion is secured, and the cycle time is shortened. In the molding process, the runner controller H shown in FIG.

  In the second press section 4 in the post process, various processes such as final punching, bending, twisting, and crushing are performed. The metal bridge 13 is cut by the cutting process 19 so that only the resin bridge 16 is formed, and various processes such as bending, twisting and crushing are performed to obtain a molded product. That is, if the metal bridge 13 is not removed, the above-described various processing on the metal is disturbed by the metal bridge 13 and cannot be performed reasonably. In the present embodiment, a metal right angle bending process 20 near the edge of the resin mold is performed to obtain a molded product.

  In the final step, the resin portion that is the resin bridge 16 is cut 21. Thus, a molded product in which the metal and the resin are integrated and the metal is molded into a predetermined shape is manufactured. At this time, the metal plate M is left with a remaining portion from which the molded product is punched and a partial bridge portion made of resin. That is, the resin remains on a part of the metal plate M left after cutting the molded product. By removing only this resin portion from the metal plate M, the metal plate M free from resin mixing can be reused.

  For example, a part of the resin bridge left on the metal plate M and a part of the metal plate M can be removed by punching. Further, since the resin adhering to the front and back surfaces sandwiching the metal plate M is small, only the resin portion can be easily removed. In particular, by making the adhesion processing portion 11 U-shaped, the remaining resin can be slid and removed.

It is a block diagram which shows the outline of the composite-type shaping | molding apparatus in the best form for implementing this invention. (A) is a partially omitted cross-sectional view showing the closed state of the composite mold of the composite mold forming apparatus, and (b) is a partially omitted cross-sectional view showing the opened state. Similarly, it explains the molding processing sequence of metal resin products by a composite mold forming device, (a) is a partially omitted plan view, (b) is an enlarged plan view of part A in (a), (c) is (b) (B) is a plan view showing a resin bridge portion, and (e) is a side view of (d). It is a block diagram which shows the outline of the composite mold apparatus in a prior art example.

Explanation of symbols

P Composite molding machine P1, P2 Press molding machine Q Resin molding machine L Supply reel T Resin dryer M Metal plate V Temperature controller H Hot runner controller 1 Fixed die 2 Movable die 3 First press part 4 Second press part 5 Resin molding part 6 Metal plate feeding device 7 Resin material filling device 8 Resin material injection hole 9 Hole 10 First punching process 11 Adhesion processing part 12 Second punching process 13 Metal bridge 14 Right angle bending process 15 Third punching process 16 Resin bridge 17 Rib 18 Idling process 19 Cutting process 20 Right angle bending process 21 Cutting process

Claims (14)

  In a method of forming a metal resin molded product by integrating a metal and a resin, after the resin molding to the metal, a press-and / or molding process is performed by pressing and / or molding as a resin-only bridge state. Mold composite mold forming method.   2. The press-mold composite mold forming method according to claim 1, wherein the metal resin molded product is formed by processing the metal edge portion in a bridge state of the resin only.   3. The press-mold composite mold molding according to claim 1, wherein the metal resin molded product is taken out by cutting a resin bridge portion that supports the metal resin molded product in a bridge state of only the resin. Method.   4. The press-mold composite molding method according to claim 3, wherein after the resin bridge portion is cut, a resin piece of the resin bridge portion left on the metal is removed.   The press-mold composite mold forming method according to any one of claims 1 to 4, wherein the resin bridge portion is provided with ribs.   6. The press-mold composite molding method according to claim 1, wherein a predetermined cooling idle time is set to cool the resin bridge portion.   7. The press-mold composite mold forming method according to claim 1, wherein the metal pressing and resin molding are simultaneously performed with a single mold.   The press-mold composite mold forming method according to any one of claims 1 to 7, wherein the press processing and the resin mold processing on the metal are continuously performed by hoop molding.   In an apparatus for forming a metal-resin molded product by integrating a metal and a resin, a resin mold that integrally molds the metal with a resin in a state where the metal is processed with a press portion and the resin is bridged with the resin alone. A press-mold composite mold forming apparatus characterized by comprising a forming part.   10. The press / mold combined molding apparatus according to claim 9, wherein the press part is provided on each of the upstream side and the downstream side in the metal transfer direction with the resin mold part interposed therebetween.   The press-mold combined mold forming apparatus according to claim 9 or 10, wherein a resin material injection hole is provided in a central part of the mold in which the resin mold forming part is arranged.   12. The press-mold combined mold forming apparatus according to claim 9, further comprising a temperature controller for adjusting the temperature of the entire mold including the resin mold forming section.   The press-mold combined mold forming apparatus according to any one of claims 9 to 12, further comprising a hot runner controller for preventing occurrence of a runner in the resin mold forming section.   A metal resin molded product formed by the press-mold composite mold forming method according to claim 1 or the press-mold composite mold forming apparatus according to any one of claims 9 to 13.

Images