JP2010076241A - Supply device of resin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supply device of a resin material which can realize the injection of an additional resin material in a simple way and at low cost. <P>SOLUTION: This supply device of a resin material is constituted of a pressurizing unit 6 which is equipped with a resin replenishing part which is stretchable and can store the resin material internally and stretches by air pressure. This resin replenishing part is arranged halfway through a supply route 4 by making the part communicate with a molding die 2 and a storage tank 3. After injecting the resin material into the molding die 2 from the storage tank 3, the pressurizing unit 6 is actuated to pressurize/contract the resin replenishing part by air pressure. Further, the resin material which flows into the resin replenishing part and remains stored there, at the time of injection, is additionally supplied into the molding die 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a resin material supply apparatus that injects and supplies a resin material into a molding die.

  Conventionally, in cast molding of a resin molded product, it has been studied to solve the problem of deterioration in appearance and the like due to mixing of voids. In the following Patent Document 1, in a pressure molding apparatus for feeding a resin material to a mold from a pressure tank through a supply pipe, a communication pipe inclined upwards has one end as a supply pipe and the other end as a pressure tank. It is described that the inside of the communication pipe is exhausted to a vacuum together with the inside of the pressurized tank. In the pressure molding apparatus described in Patent Document 1, the casting resin containing voids is press-fitted into the mold by evacuating the inside of the communication pipe inclined upward to the pressure tank. Is preventing.

  On the other hand, since the resin material is shrunk when cured to some extent in the mold, in order to make the molded product have a predetermined thickness, the resin material corresponding to the shrunk amount is additionally injected into the mold. At that time, if the injection region near the injection port of the mold becomes narrow as the resin material hardens, it is necessary to increase the injection pressure when adding the resin material. It should be determined by the size, number of workpieces, characteristics of the resin material, molding cycle, etc.

The realization of the optimum injection pressure determined in this way greatly reflects the pressure resistance structure of the resin material tank, the manufacturing cost, and the like.
JP-A-1-267008

  An object of the present invention is to provide a resin material supply device that can easily and inexpensively inject an additional resin material.

  The present invention has the following features in order to solve the above problems.

  1st invention inject | pours resin material into a shaping | molding die through a supply path from a storage tank, In the supply apparatus of the resin material to supply, It is equipped with the resin replenishment part which can be expanded-contracted and can store the resin material inside, A pressurizing device that expands and contracts the resin replenishment portion by air pressure is arranged in the middle of the supply path with the resin replenishment portion communicating with the molding die and the storage tank, and the resin material is injected from the storage tank into the molding die. After that, the pressurization device is activated, the resin replenishment part is pressurized and contracted by air pressure, and the resin material that flows in at the time of injection and is stored in the resin replenishment part is additionally supplied into the molding die. Yes.

  According to a second aspect of the present invention, in the first aspect of the invention, the pressurizing device includes a hollow device main body and a cylindrical resin replenishing portion that is inserted into the device main body and formed of a stretchable material. The apparatus main body is formed with an air intake port and an air exhaust port, and an air supply means is connected to the air intake port and the air exhaust port.

  According to a third aspect of the present invention based on the above-described feature of the second aspect of the present invention, the pressurizing device has a gas permeability between the device main body and the resin replenishing portion, and a pressure adjusting portion formed in a cylindrical shape is inserted, The resin replenishing part is uniformly pressurized by the pressure adjusting part.

  According to the first aspect of the invention, the pressurizing device that includes the resin replenishment portion that can be expanded and contracted and can store the resin material therein, and the resin replenishment portion contracts by air pressure, the resin replenishment portion includes the molding die and the reservoir. Since it is arranged in the middle of the supply path in communication with the tank, it is possible to easily and inexpensively inject the resin material to be added into the molding die in order to make the molded product have a predetermined thickness.

  According to the second invention, in addition to the effects of the first invention, the pressurizing device includes a hollow device main body and a cylindrical resin that is inserted into the device main body and formed of a stretchable material. Air supply port and air exhaust port are formed in the device body, and air supply means is connected to the air intake port and air exhaust port, so the pressurization device is realized with a simple configuration and structure. In addition, the additional supply of the resin material from the resin supply unit can be reliably performed by the air pressure.

  According to the third aspect of the invention, in addition to the effect of the second aspect of the invention, the pressurizing apparatus has a gas permeability between the apparatus main body and the resin replenishing part, and is formed in a cylindrical shape. Therefore, the resin replenishing portion is uniformly pressurized by the air pressure, and the resin material to be added can be stably and smoothly supplied into the molding die.

  FIG. 1 is a perspective view showing an embodiment of a resin material supply apparatus of the present invention. 2 and 3 are a perspective view and a cross-sectional view, respectively, showing a pressurizing device in the resin material supply device shown in FIG.

  The resin material supply device 1 stores a liquid resin material such as a thermosetting resin in a molding die 2 and supplies a storage tank 3, and a supply pipe that forms a resin material supply path 4 to be sent out from the storage tank 3. And 5. One end of the supply pipe 5 piped to the storage tank 3 side is connected to the bottom of the storage tank 3, and the supply pipe 5 communicates with the inside of the storage tank 3. The molding die 2 has a molding surface corresponding to the shape of various molded products, and includes a separable upper mold 2a and lower mold 2b. In the molding die 2, a molding space is formed between the upper die 2a and the lower die 2b when the molding die 2 is closed, and the resin material delivered from the storage tank 3 through the lower die 2b is formed in this molding space. Injected and supplied. For this reason, one end of the supply pipe 5 piped to the molding die 2 side is connected to one side end of the lower mold 2b. An injection nozzle or the like can be interposed at the connection portion between the supply pipe 5 and the lower mold 2b, and the supply pipe 5 piped on the molding die 2 side can communicate with the molding space of the molding die 2. ing. Therefore, when the molding die 2 is closed during the production of various molded products, the resin material stored in the storage tank 3 is fed into the molding die 2 through the supply pipe 5 and enters the molding space of the molding die 2. Resin material is injected and supplied. When the resin material is cured by heating, pressurizing or the like in the molding die 2, a molded product is produced.

  In addition, the supply of the resin material from the storage tank 3 can be made into a fixed quantity commensurate with the molding of the molded product, and the resin material supply device 1 can be provided with a quantitative supply means (not shown). . The fixed amount supply means may be one utilizing a mechanical means such as air pressure or a piston, and may be provided with a control means for automatically controlling the operation. Various arrangements and structures can be adopted for the quantitative supply means including those conventionally known.

  Further, the storage tank 3 can be provided with an automatic supply means for automatically supplying a certain amount of the resin material and continuously producing the molded product. As for the automatic supply means, various configurations and structures can be adopted, including conventionally known ones, as in the case of the quantitative supply means.

  Although the molding die 2 has a molding surface corresponding to the wash bowl in this embodiment, a molding surface corresponding to the shape of various molded products is adopted. In the molding die 2, the upper die 2 a can be moved up and down. When the upper die 2 a is raised, the molding die 2 is opened, and the molded product can be taken out and maintained. In manufacturing a molded product, the upper mold 2a is lowered to close the molding die 2, and a closed molding space is formed.

  In the resin material supply device 1, a pressurizing device 6 is disposed in the middle of the resin material supply path 4. A supply pipe 5 that forms a supply path 4 extending from the storage tank 3 side is connected to the pressurizing device 6 at the bottom surface, and a supply pipe 5 that forms the supply path 4 extending from the molding die 2 side at the top surface. Is connected.

  As shown in FIGS. 2 and 3, the pressurizing device 6 includes a cylindrical hollow device main body 7, a disk-shaped upper lid 8 is attached to the upper end surface portion of the device main body 7, and a lower end surface portion is provided. A disc-shaped lower lid 9 can be mounted. In order to stably mount the upper lid 8 and the lower lid 9, flange portions 10 are provided on the upper end surface portion and the lower end surface portion of the apparatus main body 7, respectively, and both flange portions 10 face the outside of the apparatus main body 7. It is overhanging. A circular resin outlet 11 is formed at the center of the upper lid 8, and a circular supply pipe connecting portion 12 communicating with the resin outlet 11 is connected to the upper lid 8. The supply pipe connection portion 12 extends upward to the upper lid 8 and, as shown in FIG. 1, one end of the supply pipe 5 extending from the molding die 2 side is connected. Similarly, a circular resin inlet 13 is formed at the center of the lower lid 9, and a circular supply pipe connection 14 communicating with the resin inlet 13 is connected to the lower lid 9. The supply pipe connecting portion 14 extends downward to the lower lid 9 and, as shown in FIG. 1, one end of the supply pipe 5 extending from the storage tank 3 side is connected. The apparatus main body 7 is connected to the upper lid 8 and the lower lid 9 by appropriate fixing tools such as bolts and nuts, and the inside of the apparatus main body 7 can be sealed by attaching the upper lid 8 and the lower lid 9.

  The pressurizing device 6 is also provided with a cylindrical resin replenishing portion 15 that is inserted into the device main body 7 and formed of a stretchable material. Specifically, the resin replenishment part 15 is formed from a rubber tube. As described above, the resin replenishing portion 15 is formed in a cylindrical shape from a material having elasticity such as rubber. The material for forming the resin replenishing portion 15 can be appropriately selected from materials that are unlikely to be dissolved or modified by reacting with the resin material in accordance with the material of the resin material to be supplied.

  As shown in FIG. 3, the resin replenishment portion 15 is sandwiched between the upper surface of the flange portion 10 at the upper end surface portion of the apparatus main body 7 and the lower surface of the outer peripheral edge portion of the upper lid 8 at the upper end portion. The upper lid 8 is attached to the apparatus main body 7 by the fixing tool of the above-described fixing device 6 and is attached to the pressure device 6. Similarly, the resin replenishing portion 15 is sandwiched between the lower surface of the flange portion 10 at the lower end surface portion of the apparatus main body 7 and the upper surface of the outer peripheral edge portion of the lower lid 9 at the lower end portion, and is secured by a fixing tool such as a bolt and a nut. The lower lid 9 is attached to the pressure device 6 by being attached to the apparatus body 7. Thus, the resin replenishing portion 15 is inserted into the apparatus main body 7 and communicates with both the molding die 2 and the storage tank 3. The resin material sent out from the storage tank 3 flows into the resin replenishing portion 15 through the resin inlet 13, and the resin material that has flowed into the resin replenishing portion 15 is directed toward the molding die 2 through the resin outlet 11. Sent out.

  As is apparent from the above, the resin replenishing unit 15 can be detached from the apparatus main body 7, and maintenance and replacement can be easily performed.

  In such a pressure device 6, an air intake port 16 penetrating inside and outside is formed in the lower side surface portion of the apparatus body 7, and an air exhaust port 17 penetrating inside and outside is formed in the upper side surface portion. Further, the apparatus main body 7 is connected to an air pipe connection portion 18 that communicates with the air intake port 16 and extends outward. Similarly, an air pipe connection portion 19 that communicates with the air exhaust port 17 and extends outward is connected to the apparatus main body 7. One end of an air pipe 20 is connected to the air pipe connecting portions 18 and 19, and an air supply means (not shown) is connected to the other end of the air pipe 20. Therefore, the inside of the apparatus main body 7 communicates with the air supply means via the air pipe 20, and air pressurized from the air supply means is supplied to the inside of the apparatus main body 7 through the air intake port 16. The supplied air is exhausted from the air exhaust port 17 toward the air supply means, and air is circulated from the air supply means and supplied to the inside of the apparatus main body 7. In this way, the resin replenishing portion 15 is pressurized and contracted by the pressure of the air (air pressure) supplied to the inside of the apparatus main body 7.

  As the air supply means, an appropriate means capable of supplying pressurized air such as an air compressor can be adopted, and the air supply means includes an appropriate valve means for controlling supply and stop of air. It can be included. Various configurations and structures can be adopted for the air supply means including conventionally known ones.

  In addition, a pressure adjusting unit 21 having air permeability and formed in a cylindrical shape is inserted into the pressurizing device 6 between the apparatus main body 7 and the resin replenishing unit 15. The pressure adjusting unit 21 forms a ventilation layer between the apparatus main body 7 and the resin replenishing unit 15, and the air pressure by the air supplied from the air supply means to the inside of the apparatus main body 7 through the air pipe 20 is the resin replenishing unit 15. It is intended to be added to the uniform. Such a pressure adjusting portion 21 is formed from a plurality of openings such as punching metal, for example, and may have a certain degree of rigidity that is difficult to be deformed by air pressure. When the pressure adjusting part 21 is formed from a punching metal, it is preferable to reduce the aperture diameter in consideration of air permeability so that the resin replenishing part 15 does not enter the opening of the punching metal and break. An example of the diameter is about φ5 mm. Moreover, the pressure adjustment part 21 can also be formed from the thick felt etc. which have air permeability. If the pressure adjusting part 21 is formed from such a felt, the problem of breakage of the resin replenishing part 15 in the case of forming from punching metal can be almost solved. The thickness of the felt is exemplified by about 5 mm.

  The pressure adjusting unit 21 uniformly applies air pressure due to the air supplied into the apparatus main body 7 to the resin replenishing unit 15, and the resin reinforcing unit 15 is uniformly pressurized.

  The above resin material supply apparatus 1 operates as follows.

  When a predetermined amount of resin material is injected from the storage tank 3 into the molding die 2 and supplied, the air supply means does not operate as shown in FIG. Air is not supplied from the mouth 16 to the inside of the main body 7 of the pressurizing device 6. For this reason, the resin material 22 flows into the inside of the resin replenishment part 15 inserted in the inside of the apparatus main body 7 through the resin inflow port 13, and the resin material 22 is filled in the resin replenishment part 15. Further, the resin material 22 flows through the resin replenishing portion 15 toward the resin outlet 11, flows out of the resin outlet 11, is injected into the molding die 2 through the supply pipe 5, and is supplied. Such injection and supply of the resin material 22 is not hindered at all by placing the pressurizing device 6 in the middle of the supply pipe 5 that forms the supply path 4, and is performed stably and smoothly.

  After the supply of the predetermined amount of the resin material 22, the supply of the resin material 22 from the storage tank 3 is stopped as shown in FIG. 4 <b>. At this time, the filled resin material 22 is stored in the resin replenishing portion 15 of the pressure device 6. When the resin material 22 is additionally injected into the molding die 2 in order to make the molded product have a predetermined thickness, when the air is supplied, the air supply means is activated, and the air is supplied to the main body 7 of the pressurizing device 6. Is circulated and supplied through the air intake port 16 and the air exhaust port 17. The air pressure of the air supplied to the inside of the apparatus main body 7 uniformly pressurizes the resin replenishing unit 15 by the pressure adjusting unit 21. Since the resin replenishing portion 15 is formed of a stretchable material, the resin replenishing portion 15 contracts upon receiving air pressure. As the resin supply unit 15 contracts, the resin material 22 stored in the resin supply unit 15 flows out to the supply pipe 5 through the resin outlet 11. In this way, the amount of resin material 22 stored in the resin replenishing unit 15 is additionally supplied into the molding die 2.

  As described above, the resin material supply device 1 includes the resin replenishment portion 15 that can expand and contract and can store the resin material 22 therein, and the pressure device 6 that contracts the resin replenishment portion 15 by the air pressure includes the resin replenishment device. Since the portion 15 communicates with the molding die 2 and the storage tank 3 and is disposed in the middle of the supply path 4, the resin material 22 to be added to the molding die 2 in order to make the molded product have a predetermined thickness. Injection can be realized easily and inexpensively.

  Further, in the resin material supply device 1, the pressurizing device 6 includes a hollow device main body 7 and a cylindrical resin supply portion 15 that is inserted into the device main body 7 and formed of a stretchable material. The apparatus body 7 is provided with an air intake port 16 and an air exhaust port 17, and an air supply means is connected to the air intake port 16 and the air exhaust port 17, so that the pressurizing device 6 has a simple configuration and structure. In addition, the additional supply of the resin material 22 from the resin supply unit 15 can be reliably performed by the air pressure.

  Further, in the resin material supply device 1, a pressure adjusting unit 21 having a gas permeability between the device main body 7 and the resin replenishing unit 15 and having a cylindrical shape is inserted in the pressurizing device 6. Therefore, the resin replenishing portion 15 is uniformly pressurized by the air pressure, and the resin material 22 to be added can be stably and smoothly supplied into the molding die 2.

  After producing the molded product, when the resin material 22 is again injected from the storage tank 3 into the molding die 2 and supplied, the operation of the air supply means is stopped. The resin replenishing portion 15 gradually returns to the original size by the resin material 22 flowing from the supply pipe 5 through the resin inlet 13, and the resin material 22 is filled again inside.

  In the resin material supply device 1, the supply pressure of the resin material 22 from the storage tank 3 is 0.3 MPa, and the air supplied to the inside of the device body 7 of the pressurization device 6 for additional supply of the resin material 22. It has been confirmed that the molded product can be manufactured with an air pressure of 0.5 MPa.

It is the perspective view which showed one Embodiment of the supply apparatus of the resin material of this invention. It is the perspective view which showed the pressurization apparatus in the supply apparatus of the resin material shown in FIG. It is sectional drawing which showed the pressurization apparatus in the supply apparatus of the resin material shown in FIG. <a> <b> are cross-sectional views showing the operating state of the resin material supply apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin material supply apparatus 2 Molding die 3 Storage tank 4 Supply path 6 Pressurization apparatus 7 Apparatus main body 15 Resin replenishment part 16 Air intake port 17 Air exhaust port 21 Pressure adjustment part 22 Resin material

Claims (3)

  A resin material supply device for injecting resin material from a storage tank into a molding die through a supply path and supplying the resin material with a resin replenishment unit that can be expanded and contracted and can store the resin material inside. A pressurizing device that expands and contracts is disposed in the middle of the supply path with the resin replenishment part communicating with the molding die and the storage tank, and after the injection of the resin material from the storage tank into the molding die, A resin material supply device that operates, pressurizes the resin replenishment portion with air pressure, contracts, and additionally supplies the resin material that flows in during injection and is stored in the resin replenishment portion into the molding die .   The pressurizing device includes a hollow device main body and a cylindrical resin replenishment portion that is inserted into the device main body and formed of a stretchable material. An air intake port and an air exhaust port are formed in the device main body. 2. The resin material supply apparatus according to claim 1, wherein an air supply means is connected to the air intake port and the air exhaust port.   The pressurizing device has a breathability between the device main body and the resin replenishing portion, and a pressure adjusting portion formed in a cylindrical shape is inserted, and the resin replenishing portion is uniformly pressurized by the pressure adjusting portion. The apparatus for supplying a resin material according to claim 2.

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