JP2006035669A - Insert resin molding die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insert resin molding die for obtaining an angle meter gear with high accuracy by accurately assembling insert members, i.e., a permanent magnet and a spindle, into an insert and integrally molding the gear. <P>SOLUTION: The numeral 1 is the permanent magnet as the insert member, and a core 4 of the fixed side die is movable. The numeral 2 is the spindle as the insert member, and a core 5 of the movable side die is movable. The insert members 1 and 2 can be easily inserted by moving the cores 4 and 5 to a die parting line 8, and can be stably supplied. Thus, the insert members can be assembled inside the mold, and the angle meter gear with high accuracy can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an insert resin molding die having a structure in which a permanent magnet and a shaft are accurately assembled concentrically with respect to gear molding and can be manufactured as a highly accurate angle measuring gear.

  Conventionally, this type of angle measurement gear has a structure in which a permanent magnet and a shaft are assembled to a single resin-molded gear, and a clearance for assembly is generated. It was not located on concentric circles and could not be assembled and constructed with high accuracy.

As prior art document information relating to this application, for example, Patent Document 1 is known.
Japanese Patent Laid-Open No. 3-155914

  In the conventional method of assembling a permanent magnet and a shaft with a single resin-molded gear, there is a problem that the permanent magnet, the shaft and the gear cannot be accurately assembled on a concentric circle.

  The present invention is intended to solve the above-described problem, and in an insert molding die, a permanent magnet and a shaft, which are insert members, are assembled with high accuracy and a gear is integrally molded. It is intended to stably supply the insert member to the mold by moving the installed mold core, and the mold adjustment pin can absorb the variation in the dimensional accuracy variation of the insert member. An object of the present invention is to provide an insert resin molding die.

  In order to achieve the above object, the present invention has the following configuration.

  According to the first aspect of the present invention, in particular, in a gear for angle measurement in which a permanent magnet and a shaft are used as insert members and integrated with gear molding, when the permanent magnet and shaft as the insert members are formed during gear molding. It has a structure that has a fixed core and a movable core that are mold cores that are integrally molded on a concentric circle with high accuracy, so that there is no variation when assembling individually molded parts, and insert members As described above, there is obtained an effect of obtaining a highly accurate angle measuring gear in which the permanent magnet and the shaft can be integrally formed on the concentric circle with high accuracy.

  According to the second aspect of the present invention, in particular, the fixed side and the movable side mold cores built in the mold cavities facing the fixed mold and the movable mold surface of the mold are respectively permanent magnets. When supplying a shaft or a shaft, it receives supply parts (permanent magnets and shafts) and moves so that it protrudes toward the parting line surface so that it can be easily held. Enables automatic supply. High cycle production is possible by enabling automatic supply. In addition, the insert variation adjusting pin is incorporated in the mold core built in the mold cavity with respect to the dimensional variation in the thickness direction of the insert member, for example, the permanent magnet, and is in contact with the end surface of the fixed mold. When the permanent magnet is positioned with the shaft in contact with the permanent magnet, it has a structure that can absorb the dimensional variation in the thickness direction of the permanent magnet, which enables assembly of the insert member in the mold. The effect of making is obtained. And the effect that a metal mold | die is not damaged even if there is an accuracy variation of an insert member is acquired.

  The invention according to claim 3 of the present invention is particularly an insert member in which a groove that can be sucked by air is arranged in the mold core in order to reliably insert the member inserted in the mold core into the mold core. When the supply is stabilized and a supply error occurs, the suction pressure due to air does not increase, so it has a configuration that can prevent malfunction such as stopping the automatic machine, The effect that the insert member can be stably fixed to the mold core is obtained.

  An insert resin molding die according to the present invention is an insert member in which a permanent magnet and a shaft, which are insert members, are assembled in a mold with high accuracy and a gear is integrally molded, and an insert capable of obtaining a gear capable of improving angle measurement accuracy. A resin mold is provided. Further, by moving the mold core, the insert member is to be stably supplied to the mold, so that automation by a robot can be realized and productivity can be improved. Further, the variation in the dimensional accuracy of the insert member can be absorbed by the mold adjusting pin, and there is an effect that stable production can be realized without damaging the mold.

  Hereinafter, the first and second aspects of the present invention will be described with reference to the first embodiment.

  Note that the same components and the like as those described in the background art are assigned the same reference numerals and detailed description thereof is omitted.

  FIG. 1 is a cross-sectional view of a main part of an angular velocity measuring gear product according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of an insert resin molding die, and FIG. 4 and 5 are cross-sectional views showing the main part of the operation process. In FIG. 1, 1 is a permanent magnet which is an insert member, 2 is a shaft, and is integrally formed with 3 resin gear portions. The permanent magnet 1 and the shaft 2 are assembled with high accuracy by the insert resin molding die, and the angular velocity is measured with high accuracy by integrally molding with the resin gear portion 3. In FIG. 2, reference numeral 1 denotes a permanent magnet as the insert member, and the mold fixing side core 4 is movable. Reference numeral 2 denotes a shaft which is the insert member, and the mold movable side core 5 is movable. Reference numeral 6 denotes a pin that can move freely in the mold movable side core 5, and when there is a variation in the dimensional accuracy of the permanent magnet 1 or the shaft 2 that is an insert member, the mold fixed side core 4. And an adjustment pin that absorbs the movable mold core 5 without damaging it. Reference numeral 7 denotes a spring for allowing the adjusting pin 6 to move freely. Reference numeral 9 denotes a fixed side mold, and reference numeral 10 denotes a movable side mold, which abut on the mold parting line surface of 8. The insert member of the permanent magnet 1 and the shaft 2 facilitates insertion and stable supply by moving the mold fixed side core 4 and the mold movable side core 5 to the mold parting line surface 8 as shown in FIG. It becomes possible to do. At this time, the permanent magnet 1 is guided and inserted by the guide 11 at the tip of the die fixed side core 4 at the time of insertion. However, the permanent magnet 1 is unstable and falls when the fixed die 9 and the movable die 10 are closed. Alternatively, insertion displacement or the like is caused, and the mold is damaged by being sandwiched between the mold parting line surfaces 8. Therefore, as shown in FIG. 3, the mold fixing core 4 has a structure capable of adsorbing air from the air holes 12 in order to fix the permanent magnet 1, and can prevent damage to the mold. FIG. 4 shows a state in which the permanent magnet 1 and the shaft 2 which are insert members are inserted. In FIG. 5, the fixed mold 9 and the movable mold 10 are closed, and the fixed mold core 4 and the movable mold core 5 are moved and moved to predetermined positions, respectively. The mold stationary side core 4 and the mold movable side core 5 are movable to the mold parting line surface 8 and can easily and stably supply the permanent magnet 1 and the shaft 2 as insert members. Automatic supply by a robot is possible, and a molding cycle can be improved and productivity can be improved.

  The insert resin molding die according to the present invention is an assembly in which the permanent magnet and the shaft, which are insert members, are assembled in the mold with high accuracy and the gear is integrally molded, and a gear capable of improving the angle measurement accuracy can be obtained. An insert resin mold is provided. Further, by making the mold core movable, the insert member is to be stably supplied to the mold, so that automation by a robot can be realized and productivity can be improved. In addition, variations in the dimensional accuracy of the insert member can be absorbed by the mold adjustment pin, and stable production can be realized without damaging the mold. It is useful for applications such as an insert resin molding die configured to manufacture a gear for angle measurement with high accuracy assembled on a concentric circle with respect to molding.

  Alternatively, the insert resin molding die according to the present invention is an assembly in which a permanent magnet and a shaft, which are insert members, are assembled in a mold with high accuracy, and a gear is integrally molded, thereby obtaining a gear that can improve angle measurement accuracy. The present invention provides an insert resin molding die that can be used. Further, by making the mold core movable, the insert member is to be stably supplied to the mold, so that automation by a robot can be realized and productivity can be improved. In addition, even with variations in the dimensional accuracy of insert members, permanent magnets and shafts must be gear-molded, which requires that the mold adjustment pins absorb the variations and enable stable production without damaging the mold. On the other hand, it can also be applied to uses such as an insert resin molding method in which a highly accurate angle measuring gear is manufactured on a concentric circle with high accuracy.

Cross section of the main part of gear products for angular velocity measurement Cross-sectional structure diagram of main part of insert resin molding die in Embodiment 1 of the present invention Detail of cross section of main part of fixed side core Cross-sectional view of the main part explaining the operation process Cross-sectional view of the main part explaining the operation process

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Permanent magnet 2 Axis 3 Gear 4 Mold fixed side core 5 Mold movable side core 6 Adjustment pin 7 Spring 8 Mold parting line surface 9 Fixed side mold 10 Movable side mold 11 Guide 12 Air hole

Claims (3)

In an angle measurement gear that uses a permanent magnet and shaft as an insert member and is integrated with gear molding, the permanent magnet and shaft that are the insert members are integrally molded on a concentric circle with respect to gear molding with high accuracy. An insert resin molding die having a die core capable of obtaining a gear for use. A mold cavity having a movable fixed side and a movable side mold core built in a mold cavity facing a mold surface of a fixed mold and a movable mold of the mold, and the mold cavity described above with respect to the dimensional variation of the insert member 2. The insert resin molding die according to claim 1, wherein a mold core incorporated in the die is provided with a pin for adjusting the variation of the insert so as to absorb the dimensional variation. In order to securely insert the member inserted in the mold core into the mold core, a groove that can be sucked by air is arranged in the mold core, and the insert member is sucked. 2. The insert resin molding die according to claim 1, wherein the suction pressure due to air does not increase, so that a malfunction can be prevented, for example, the automatic machine is stopped.

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