JPH0718814U - Sprue runner unmanned grinding system - Google Patents

Abstract

(57) [Summary] [Purpose] A sprue runner carry-in device that suspends a bucket for transporting to a crusher by grasping and lifting the sprue runner with a plurality of claws on the center of a bowl-shaped sprue runner housing tank. In an automatic sprue / runner unmanned grinding system connected to a pellet remanufacturing device, it is possible to prevent the sprue / runner in the sprue / runner storage tank from being unevenly distributed during the operation of the system, so that the lifting by the bucket does not rotate. [Structure] The bucket is suspended on an eccentricity of the sprue / runner housing tank, and the sprue / runner housing tank is configured to rotate by a constant angle each time the sprue / runner is lifted by the bucket.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sprue / runner unmanned crushing system for automatically remanufacturing granular pellets, which are raw materials for synthetic resin products, from sprue / runners such as work scraps and defective products produced during plastic injection molding.

[0002]

[Prior art]

 Normally, the sprue runner generated during plastic injection molding is crushed, melted, and used again as a pellet for injection molding.However, the remanufacturing process is currently performed after crushing the sprue runner. Are mostly automated. However, since the sprue and runners are transported from the storage tank to the crusher by hand, there are problems such as wasted human resources and failures due to differences in the sprue and runner input amounts. A system has been developed by the applicant to carry a fixed amount of sprue runner to a crusher. (Refer to Actual Fairness 5-23292)

That is, it is provided with a crusher connected to a pellet remanufacturing device and a bowl-shaped sprue runner storage tank. A sprue runner with a plurality of claw pieces is provided on the center of the sprue runner storage tank. Suspend a bucket that can be lifted by grasping each small amount, and install a sensor that detects the object between the crusher and the sprue and runner storage tank, and also lift the sprue and runner into the crusher. It is provided with a sprue runner carry-in device configured to perform sequence control of the operations up to.

[0004]

[Problems to be solved by the device]

 However, in this system, since the bucket always descends and hoists on the center of the sprue runner-accommodating tank, sprue runners at other positions are mutually reduced even though only the sprue runner near the center is reduced. Since it is caught and remains unmoved, an imbalance that sprue runners are unevenly distributed tends to occur. The present invention is intended to provide a sprue runner unmanned crushing system that solves the above-mentioned conventional drawbacks.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the unmanned sprue / runner crushing system according to the present invention comprises a crusher that crushes the sprue / runner and automatically supplies the sprue / runner to the pellet remanufacturing device, and a bowl type that can rotate by a fixed angle The sprue / runner storage tank is installed on the eccentricity of the sprue / runner storage tank, and a bucket with a plurality of claws that can be lifted by grasping the sprue / runner little by little is suspended. In addition to being equipped with a sensor that detects objects, the bucket claws lift the sprue runner by gripping it, carry it to the crusher, and put it in.・ The runner storage tank is configured to be sequence-controlled to rotate at fixed angles.

[0006]

[Action]

 Therefore, each time the bucket claws grab the sprue runner and lift it, the sprue runner storage tank rotates by a fixed angle to constantly lift and convey a fixed amount of sprue runner. Lanna deposits on average never become unbalanced.

[0007]

【Example】

 1 to 3, 10 is a pellet reproducing apparatus including a hopper 11, a feeder 12, a cylinder 13, a water cooling tank 14, a strand 15, a pelletizer 16 and the like, and is a crusher. The pellet runner 31 feeds the pelletized material for pellet reproduction from the spool runner 31 from 20. Reference numeral 40 denotes a device for loading the sprue runner into the crusher 20 including the bowl-shaped sprue runner storage tank 30. The sprue runner storage tank 30 rotates by a constant angle each time the sprue runner is lifted.

An arm mount 41 is provided in the rear of the sprue / runner accommodating tank 30 and the crusher 20, a horizontal shaft arm 43 is provided in the horizontal axis direction of the arm mount, and the horizontal shaft arm is provided. A movable vertical arm 42 is provided on the upper side, an air cylinder support arm 47 is movable on the vertical arm 42, and an air cylinder 48 is attached to the tip of the support arm. ing.

A piston rod 49 is attached to the air cylinder 48 so as to be slightly eccentric from the center of the bottom surface of the sprue / runner housing tank 30, and a bucket 44 is attached to the tip of the piston rod 49. The bucket 44 is provided with four claw pieces 45 capable of grasping a small amount of sprue and runner by opening and closing, and a sensor 46 for detecting the sprue and runner receiving port of the crusher 20 is attached to the tip thereof. There is.

Here, movement of the air cylinder support arm 47 and the air cylinder 48 and the bucket 44 on the horizontal axis arm 43 and the vertical axis arm 42, the opening and closing of the pawl piece 45 of the bucket 44, and the rotation of the sprue and runner accommodating tank 30. Etc. are all performed by air pressure, and each operation thereof is controlled by the sequence controller 50.

[0011]

[Effect of device]

 The present invention is configured as described above, and the sprue / runner accommodating tank is rotated by a fixed angle each time the bucket hoists the sprue / runner, and an average amount of the sprue / runner is hoisted in sequence and fed into the crusher. Since the sprue runner is not unevenly distributed in the tank, the breakdown of the crusher is small. In addition, the operation of the entire system is performed automatically and smoothly, in addition to the transfer from the sprue / runner storage tank to the crusher, and almost no manpower is required at all times.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention connected to a pellet reproducing device.

FIG. 2 is a plan view of an embodiment of the present invention.

FIG. 3 is a side view of the embodiment of the present invention.

[Explanation of symbols]

 10 Pellet Remanufacturing Device 11 Hopper 12 Feeder 13 Heating Cylinder 14 Water Cooling Tank 15 Strand 16 Pelletizer 17 Transport Pipe 20 Crusher 30 Sprue Runner Storage Tank 31 Sprue Runner 40 Sprue Runner Carrying Device 41 Arm Mounting Base 42 Vertical Axis Arm 43 Horizontal axis arm 44 Bucket 45 Claw piece 46 Sensor 47 Air cylinder support arm 48 Air cylinder 49 Piston rod 50 Sequence control unit

Claims (1)

[Scope of utility model registration request] 1. A pellet remanufacturing apparatus (1) for injection molding material.
A sprue runner unmanned crushing system connected to 0), a crusher (20) for crushing the sprue runner and automatically supplying the crushed sprue runner to the pellet making device, and a bowl-shaped crusher capable of rotating at a constant angle. Sprue and runner storage tank (30)
A bucket (44) having a plurality of claw pieces (45) capable of grasping and lifting the sprue runner (31) little by little on the eccentricity of the sprue runner accommodating tank (30), A sensor (46) for detecting an object is provided at the lower end thereof, and a claw piece (45) of a bucket (44) grabs the sprue runner (31) and lifts it, and carries it to a crusher (20) and throws it in. And the operation of rotating the sprue runner accommodating tank (30) by a fixed angle every time the claw pieces (45) of the bucket (44) grab and lift the sprue runner (31). A sprue and runner unmanned grinding system comprising the sprue and runner carry-in device (40).