JPH0318165Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a mold for an injection molding machine. More specifically, the invention relates to automatically exchangeable molds.

(Prior Art) In order to take out the runner separately from the molded product due to the shape of the molded product and the need to take out a large number of molded products, the structure of the mold needs to be a three-piece structure as shown in FIG. 3.

(Problem) In such a three-piece mold, it is necessary to provide and move an intermediate plate in order to project the molded product and the runner in conjunction with the opening of the mold. For this reason, it has been conventional practice to connect a movable mold and an intermediate plate to a chain. However, when the mold is closed, the chain may hang down below the bottom of the mold, as shown in FIG. This becomes a major obstacle when attempting to automate injection molding by automatically transporting the mold. For example, when a mold is placed on a roller conveyor and moved, a chain hanging down from a free roller of the roller conveyor may hit and disable conveyance. Furthermore, when a mold is horizontally inserted into or removed from a mold clamping device of an injection molding machine, the chain hanging from the stay hits and becomes an obstacle.

(Solution) The present invention is intended to eliminate these obstacles, and the gist of this invention is to solve the problem with respect to a fixed mold that has one end fixed to a movable mold fixed to a movable platen and the other end fixed to a fixed platen. A guide is provided at the center of the chain fixed to a moving intermediate plate for a certain length to keep the chain horizontal.

(Function and Effect) In this way, the drooping of the chain in the three-piece mold was prevented, and the obstacle when the mold was moved horizontally and automatically replaced was eliminated.

(Example) An example of the present invention will be described according to the drawings. 1 is a fixed plate, and 2 is a movable plate that moves back and forth with respect to the fixed plate 1. Reference numeral 3 represents a stationary mold body fixed to the stationary platen 1, and 4 represents an intermediate plate that moves along guide pins 5. 6 is a pin that determines the forward limit of the intermediate plate 4. In this embodiment, the intermediate plate 4 plays the role of a protruding plate for ejecting the molded product 7 from the male die, but in addition to this, in a multi-cavity mold, the intermediate plate is also used when ejecting the runner separately from the molded product. used. Reference numeral 8 denotes a pair of mold insertion guide rollers fixed to the mold mounting surface of the stationary platen. 9 is a movable side mold fixed to the movable platen 2. Reference numeral 10 is a chain having one end fixed to the side surface of the movable mold 9 and the other end fixed to the side surface of the intermediate plate. Reference numeral 11 denotes a guide bracket for keeping the central portion of the chain 10 horizontal at all times.As shown in FIG. There is. This guide bracket 11
Therefore, by opening the mold and moving the movable platen 2, the intermediate plate 4
When the chain 10 is moved, the chain 10 is pulled horizontally, and the guide bracket 11 remains horizontal together with the chain 11. When the mold is closed, the center part of the chain hangs down, but because of the presence of the guide bracket 11, the plurality of chain links 10A at the center line up horizontally along the guide bracket 11 and do not hang down. 1
2 is a stay, and the movable plate 2 reciprocates along the stay. 13 is a heating cylinder that plasticizes and injects the resin.

[Brief explanation of the drawing]

FIG. 1 is a front view of a device showing an embodiment of the present invention, FIG. 2 is a diagram showing another operating state of the device shown in FIG. 1, and FIG. 3 is a diagram showing a device using conventional means. FIG. 4 is an enlarged view of the main parts. 3: Fixed side mold body, 4: Intermediate plate, 5: Guide pin, 9: Movable side mold, 10: Chain, 11: Guide bracket.

Claims (1)

[Scope of utility model registration request] In a mold including a movable mold 9, a fixed mold main body 3, and an intermediate plate 4 that moves a certain distance along a guide pin 5 provided on the fixed mold main body 3, the side surface of the movable mold 9 A chain 10 is provided with one end fixed to the side surface of the intermediate plate 4 and the other end fixed to the side surface of the intermediate plate 4, and a guide bracket 11 is provided in the center of the chain 10 to keep a plurality of chain links 10A horizontally. Mold equipment for injection molding.