JP2007125834A - Keylock structure of mold for resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety structure in a mechanical construction so as a mold for resin molding not to be released/fell down from a fitting plate for a mold of on a main body of an injection molding apparatus and a crank plate integrating an electromagnet, even in a case that an electric source for the electromagnet is cut off by an unexpected trouble. <P>SOLUTION: A rocket ring part with a keylock provided at the both ends of a mold for resin molding is inserted into a hole for the rocket ring with the keylock formed on a mold mounting plate of the main body of the mold for the injection molding apparatus, and in the hole part, a hook part 71 is formed by making a hole part a structure having an elliptical hole being long downward so as to hook a top part of the rocket ring part with a keylock. The safety structure comprising the mechanical construction so as for the mold for resin molding not to be released/fell down from the mold fitting plate 1 of the main body of the injection molding apparatus and the crank plate 2 integrating the electromagnet, even in a case that the electric source for the electromagnet is cut off by the unexpected trouble, is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a mechanical key lock structure to prevent dropping even if there is an abnormality such as accidental power loss of the electromagnet, to prevent the risk of the mold falling from a predetermined position. The present invention relates to a resin mold having a magnet clamp which improves work safety and prevents damage to related devices.

  With a resin mold with a magnet clamp that uses the attractive force of an electromagnet, which has been widely used in the past, work can be done because the mold and the mounting plate of the molding machine body can be quickly fixed and separated by energizing and opening the electromagnet power supply. Although there was an advantage that it was excellent in performance, when there was an abnormality in the excitation power of the electromagnet due to some unexpected trouble, there was not only danger of work such as dropping of heavy metal mold However, there has been a problem that the damage to the molds and peripheral devices has occurred, causing more damage.

  An example of a conventionally known fall prevention measure will be described with reference to FIG. Reference numeral 1 denotes a mold attachment plate fixed to the molding apparatus main body, and reference numeral 2 denotes a crank plate having a built-in electromagnet device. The crank plate 2 incorporating this electromagnet device is firmly and constantly fixed to the mold mounting plate 1 at its four corners using fastening members (not shown). The mold 3 that frequently needs to be replaced by changing the molded product is adsorbed and fixed to the crank plate 2 containing the electromagnet device by electromagnetic force. In such a mold mounting structure, a hook 6 as shown in FIG. 2 and an electromagnet device are incorporated in order to prevent the mold from dropping and dropping in the event of an abnormality such as accidental power loss of the electromagnet. A safety measure has been taken in which both the eyebolt 4 screwed to the crank plate 2 and the eyebolt 5 screwed to the mold 3 are prevented from falling.

 However, with a structure that depends on human work such as connecting with a hook as described in the above 0003, human errors such as forgetting to hook are unavoidable, and it is a cheap and reliable foolproof machine. It was desired to devise a new structure.

In addition to the effect of fixing the resin molding die by the electromagnet attracting action and the die mounting plate of the main body of the injection molding apparatus, the present invention provides injection of rocket ring portions with key locks provided at both ends of the resin molding die. A structure with a long oval hole on the lower side so that the tip of the rocket ring part with key lock is hooked and inserted into the hole for the rocket ring with key lock provided on the mold mounting plate of the main body of the molding apparatus In order to prevent the resin mold from being detached from the mold mounting plate of the injection molding machine main body and the crank plate with the built-in electromagnet, even if the electromagnet power is cut off due to an unexpected trouble. A safety structure having a mechanical structure is provided.
Patent Publication 2005-169840

  In the present invention, in addition to the fastening effect between the resin molding die due to the attraction of the electromagnet and the die mounting plate of the main body of the injection molding apparatus, the rocket rings with key locks provided on both side ends of the resin molding die are injection molded. The hook was inserted into a hole for a rocket ring with a key lock provided on the die mounting plate of the main body of the apparatus, and a hook portion was formed in the hole so that the rocket ring with a key lock was hooked.

  In this way, a mechanical redundant structure is provided as a safety measure to prevent falling, so even if the electromagnet is turned off due to an unexpected trouble, it is safe without dropping, and an eyebolt provided in a molding die not shown Since the detachment is performed only when the mold is lifted by 4, not only can the safety of work be ensured, but also the mold and peripheral devices can be prevented from being damaged.

  The external appearance of the mounting state of the resin molding die to which the structure of the present invention is applied is not changed from the conventional structure and is shown in FIG. Reference numeral 1 denotes a mold attachment plate fixed to the molding apparatus main body, and reference numeral 2 denotes a crank plate having a built-in electromagnet device. The crank plate 2 incorporating this electromagnet device is firmly fixed to the mold mounting plate 1 at its four corners using fastening members (not shown).

  3 and 4 are explanatory views inside the structure according to the present invention, and a mold adsorbing plate in which an electromagnet fixed by using a fastening member (not shown) is embedded in the mold mounting plate 1 of the main body of the injection molding apparatus. 2 is a partial cross-sectional view showing a main part of engagement between 2 and a rocket ring part 7 with a key lock of a mold 3. FIG. In the crank plate 2 incorporating the electromagnet device, a long oval hole 81 is formed on the back side of the round hole 8 on the lower side to form a hook portion for hooking the hook portion 71 of the rocket ring portion 7.

  In the crank plate 2 incorporating the electromagnet of FIG. 3, a region 22 that avoids the incorporation of the electromagnet is provided on the die attracting surface 21 of the built-in electromagnet. In this region 22, a round hole and a long hole 23 communicated with each other. Is provided. 4 is an elliptical hole in which the rocket ring 7 of the mold 3 is inserted into the hole 8 shown in the AA partial cross section of the crank plate incorporating the electromagnet of FIG. 3, and the hook portion 71 of the rocket ring 7 becomes the hook portion. 81 is engaged. Further, the diameter pie a of the rocket ring 7 part is formed slightly smaller than the hole diameter pie a ′.

  In the embodiment, the structure is such that the rocket ring part is hooked on the stepped part by the round hole and the elliptical hole, but it may be a mechanical hook structure that prevents the heavy metal mold from falling off the mold mounting plate of the main body of the injection molding apparatus. For example, the details are not particularly limited, and a plurality of engaging portions having different shapes may be provided depending on the weight and shape of the mold.

  As described above, since an inexpensive mechanical redundant structure is provided as a safety measure for preventing the fall, it is safe even when the excitation power of the electromagnet is cut off due to an unexpected trouble, and its industrial utility value is great.

Perspective view of the appearance of a general resin mold External view of the mold used in the conventional method The perspective view of the crankplate which incorporated the electromagnet apparatus of this invention The fragmentary sectional view of the key lock structure principal part of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold mounting plate of molding apparatus main body 2 Crank plate with built-in electromagnet device 3 Mold 4 Eye bolt 5 Eye bolt 6 Hook 7 Rocket ring 71 Hooking part 8 Round hole 81 Elliptical hole forming the hooking part

Claims (1)

  The rocket ring with key lock provided on both ends of the resin mold is inserted into the hole for the rocket ring with key lock of the magnet clamp plate with built-in electromagnet, and the rocket ring with key lock is caught in the hole. A key lock structure for a resin molding die, wherein a portion is formed so that the resin molding die does not fall apart from a magnet clamp plate containing an electromagnet of an injection molding device.