JP4196355B2 - Key lock structure of resin mold - Google Patents

Description

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

  With conventional resin molds with a magnet clamp that uses the attractive force of electromagnets, the mold and the mounting plate of the molding machine body can be quickly fixed and separated by energizing / releasing 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, not only there was a work risk such as dropping a heavy metal mold However, there has been a problem that the damage to the mold and peripheral devices has occurred, resulting in greater 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 clamp plate incorporating an electromagnet device. The clamp plate 2 incorporating the electromagnet device is firmly and constantly fixed to the mold mounting plate 1 at its four corners using fastening members (not shown). A mold 3 that frequently needs to be replaced by changing a molded product is attracted and fixed by an electromagnetic force to a clamp plate 2 containing an electromagnet device. 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 or dropping when there is 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 clamp 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 hooks as described in 0003, human error such as forgetting to hook is unavoidable, and it is a cheap and reliable foolproof machine. It was desired to devise a new structure.

In addition to the fastening effect between the resin mold and the mold mounting plate of the main body of the injection molding apparatus, the locating ring part with the key lock provided on both side ends of the resin mold is injected. Inserted into the locating ring with key lock provided on the mold mounting plate of the molding machine body, and the hole has a long oval hole on the lower side so that the tip of the locating ring with key lock can be caught By adopting a structure, even if a hook part is formed and the electromagnet power is cut off due to an unexpected trouble, the resin mold is separated from the mold mounting plate of the injection molding machine main body and the clamp plate containing the electromagnet. -A safety structure with a mechanical structure is provided so as not to fall.

In the present invention, in addition to the fastening effect of the resin molding die by the attracting action of the electromagnet and the die mounting plate of the main body of the injection molding apparatus, the locating ring with the key lock provided on both side ends of the resin molding die is injection molding. A hooking portion was formed so that the locating ring with a key lock was hooked into the hole, and the hole was inserted into a locating hole with a key lock provided on the die mounting plate of the main body of the apparatus.

  In this way, a mechanical redundant structure is provided as a safety measure to prevent falling, so even if the electromagnet power is cut off due to an unexpected trouble, it is safe without dropping, and an eyebolt provided on 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 the same as 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 clamp plate incorporating an electromagnet device. The clamp 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 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 locating ring part 7 with a key lock of a mold 3. FIG. In the clamp 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 catching portion for catching the catching portion 71 of the locate ring portion 7.

In the clamp plate 2 with the built-in electromagnet shown in FIG. 3, a region 22 is provided on the die attracting surface 21 of the built-in electromagnet so as to avoid the built-in electromagnet. Is provided. Further, FIG. 4 is locating ring 7 of the die 3 is inserted into the hole 8 shown in A-A partial cross-sectional of the clamping plate with a built-in electromagnet of Figure 3, elliptical holes to be hooked portion 71 is caught portion of the locating ring 7 81 is engaged. Further, the diameter pie a of the 7 part of the locating ring is formed slightly smaller than the hole diameter pie a.

In the embodiment, the locating ring part is hooked to the stepped part by the round hole and ellipse hole. However, 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 clamp plate 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

1: Mold mounting plate 2 of molding apparatus main body: Clamp plate 3 with built-in electromagnet device 3: Mold 4: Eye bolt 5: Eye bolt 6: Hook 7: Locate ring 71: Hook portion 8: Round hole 81: Hook portion is formed Elliptical hole

Claims (1)

A magnet clamp plate containing an electromagnet is provided between the molding device main body and the resin mold, and the magnet clamp plate is provided with a hole having a portion where the locating ring with a key lock is caught. The locating ring part with key lock provided on both ends of the mold is inserted into the hole for locating ring with key lock on the magnet clamp plate, and the resin molding die incorporates the electromagnet of the injection molding device. A key lock structure for a resin-molded mold, which is constructed so as not to fall apart from the magnet clamp plate .