JPS61154918A - Automatic demolding device for molded product of injection molding machine or the like - Google Patents

Abstract

PURPOSE:To permit to contrive sure and high speed chucking and reduce the cost of the device by a method wherein a chuck is retreated to the outside of the molding machine upon mold closing stroke by moving it in conjunction with the movement of a movable platen while the chuck is advanced into the molding machine upon mold opening stroke. CONSTITUTION:When the movable platen A is moved horizontally, a small pinion 2, meshing with a rack 1, is turned and the rack 4 is moved up-and-down through a large pinion 3 while a running carriage 5 travels on a rail simultane ously with the movement of the rack 4. The chuck 6, attached to the movable carriage 5, moves to the direction (a) (b) in conjunction with the mold closing operation of the movable platen A but, on the contrary, the chuck 6 moves to the direction (b) (a) upon the mold opening stroke and grasps the molded product at the position (a) while it releases the product at the position (b). Thus, the movement of the movable platen A is delivered by the pure mechani cal device consisting of the rack and pinion, therefore, the movement of gripping device is made sure and the gripping device may stand against the high-speed operation sufficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION (Related Industrial Field) The present invention relates to an automatic take-out device for molded products in injection molding machines and the like.

(Prior art) As an automatic take-out device for molded products, for example, Japanese Patent Application Laid-Open No. 53-121
The one disclosed in No. 857 is known. This is a link mechanism interposed between a fixed platen and a movable platen that allows the molded product or runner to be held and removed, and is operated mechanically by opening and closing the mold. It has become.

With this configuration, the mold opening/closing operation of the conventional mold clamping device and the operation of the molded product ejecting device are less likely to malfunction than when the mold clamping device operates electrically. However, there was a limit to high-speed operation.

(Problems to be Solved by the Invention) The present invention utilizes the movement of a movable platen of a mold clamping device to run a molded product take-out device, and is compatible with a molded product take-out device that is moved by an air cylinder or by a motor. In comparison, the present invention aims to provide a retrieval device that is more reliable, can achieve higher speeds, and is inexpensive.

(Means for solving the invention) The movement of the movable platen is transmitted to a movable cart equipped with a gripping tool such as a chuck for taking out the molded product through a combination of racks and binions, and the chuck is used in the mold closing process in conjunction with the movement of the movable platen. It is characterized in that it is retracted outside the molding machine, and in the mold opening process, it can enter into the molding machine and take out the molded product.

(Example) In the figure, A is a movable platen, and B is a fixed platen. 1
is a rack, which is fixed to the movable platen A, and is engaged with a small pinion 2 provided on the fixed platen B side. 3 is a large pinion installed coaxially with small pinion 2,
It engages with a rack 4 attached to a traveling cart, which will be described later. The traveling carriage 5 is guided by rails 8 provided on a traveling beam 7 attached to the fixed platen B, and moves linearly in a direction perpendicular to the moving direction of the movable platen A. A gripper such as a chuck 6 for taking out the molded product is attached to the traveling carriage 5. Although the figure shows an opening/closing type gripping device as the gripping tool, it may also be one that takes out the molded product by suction with a suction cup.

In the case of an opening/closing type chuck, for example, an opening/closing cylinder (not shown) is installed in an arm 9 fixed to the traveling carriage 5 to perform opening/closing operations. In the case of a suction type, a suction cup connected to a suction source (not shown) is attached in place of the chuck 6, and the suction cup is suctioned. In this case, the opening surface of the suction cup can usually be turned 90° toward the molded product.

(Operation of the Invention) When the movable platen A moves horizontally, the small pinion 2 that meshes with the rack 1 rotates, and the rack 4 is moved up and down via the large pinion 3. Simultaneously with the movement of the rack 4, the carriage 5 runs on the rails 8.

Now, Ql: the amount of movement of the movable platen Q2: the amount of movement of the movable cart Zl: the number of teeth on the small pinion Zl: the number of teeth on the large pinion, then Qx = 91-
22/Z 1 , and the chuck 6 attached to the movable cart 5 moves in the direction from A to the mouth in the mold closing process in conjunction with the mold opening/closing operation of the movable platen A, and conversely from the mouth to A in the mold opening process. move towards The chuck 6 grips the molded product at the position A and releases it at the mouth position.The molded product is taken out by the chuck that moves in synchronization with the movement of the movable platen A.

(Effects of the Invention) Since the movement of the movable platen A is transmitted by a purely mechanical device consisting of a rack and pinion, not only the movement of one gripping tool is reliable, but also it can withstand high-speed operation.

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention. Figure 2 is a view taken along the ■-■ arrows in Figure 1. In the figure: A Movable platen B Fixed platen 1 Rack
2 Small pinion 3 Large pinion 4 Rack 5 Traveling trolley 6 Chuck 7 Traveling beam 8 Rail 9 arms Above 1st figure

Claims (1)

[Scope of Claims] [I] A rack attached to a movable platen of an injection molding machine, etc., a small pinion that meshes with the rack, a large pinion that is mounted coaxially with the small pinion, and a rack that meshes with the large pinion. , a traveling trolley capable of traveling while being guided on a rail on a traveling beam to which the rack is fixed; and a traveling trolley mounted on the traveling trolley and capable of reciprocating between a molded product gripping position and a molded product take-out position outside the molding machine. An automatic molded product ejecting device for injection molding machines, etc., consisting of a gripping tool such as a chuck. [II] An automatic molded product take-out device for an injection molding machine or the like according to claim [I], characterized in that the chuck is a suction cup.