JPH0739612Y2 - Sprue runner unmanned grinding system - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is a sprue runner unmanned crusher that automatically recreates 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. It is about the system.

[0002]

2. Description of the Related Art Usually, a sprue runner produced during plastic injection molding is crushed and melted and used again as a pellet for injection molding.
Today, everything after crushing the sprue runners has been largely automated. However, since the sprue and runners are transported from the storage tank to the crusher by hand, there are problems such as waste of personnel and the occurrence of breakdowns due to differences in the amount of sprue and runners input. A system has been developed by the applicant to bring a fixed amount of sprue runner to a crusher. (Refer to Actual Fairness 5-23292)

That is, it is equipped with a crusher connected to a pellet remanufacturing device and a bowl-shaped sprue runner storage tank. The sprue runner is provided with a plurality of claw pieces on the center of the sprue runner storage tank. Suspend a bucket that can be lifted by grasping the
A sprue / runner carry-in device which is provided with a sensor for detecting an object between the runner storage tank and a sprue / runner carry-in device configured to sequence-control the operation of hoisting the sprue / runner and throwing it into the crusher Is.

[0004]

However, in this system, since the bucket always descends and hoists on the center of the sprue runner housing tank, even if only the sprue runner near the center decreases, other buckets The sprue runners in the position are caught by each other and remain stationary,
An imbalance that causes uneven distribution of sprue runners tends to occur. The present invention is intended to provide a sprue runner unmanned grinding system that solves the above-mentioned conventional drawbacks.

[0005]

In order to achieve the above object, an unmanned sprue runner crushing system according to the present invention is a crusher for crushing a sprue runner and automatically supplying the crushed sprue runner to the pelletizing device. And a bowl-shaped sprue / runner storage tank that can rotate by a fixed angle.On the eccentricity of the sprue / runner storage tank, a bucket with a plurality of claw pieces that can hold and lift the sprue / runner in small increments is provided. Suspended and equipped with a sensor to detect the object at the lower end, the bucket claw piece grabs the sprue runner and lifts it, carries it to the crusher, and throws it in. Every time the runner is grabbed and lifted, the sprue / runner accommodating tank is configured to be sequence-controlled to rotate by a constant angle.

[0006]

Therefore, every time the claw pieces of the bucket grab the sprue runner and lift it up, the sprue runner accommodating tank rotates by a fixed angle to always lift and convey a fixed amount of sprue runner. On average, sprue runner deposits do not become unbalanced.

[0007]

EXAMPLES Next, examples will be described with reference to FIGS.
In FIG. 3, 10 is a hopper 11, a feeder 12,
In the pellet reproducing apparatus including the cylinder 13, the water cooling tank 14, the strands 15, the pelletizer 16, and the like, the pellet reproducing material is sent from the crusher 20 by the transport pipe 17 from the sprue runner 31 into small pieces. Reference numeral 40 denotes a device for loading the sprue runner into the crusher 20 including a 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.

Sprue / runner storage tank 30 and crusher 2
An arm mount 41 is provided on the rear side between 0 and 0, a horizontal arm 43 is provided in the horizontal axis direction of the arm mount, and a movable vertical arm 42 is provided on the horizontal arm. An air cylinder support arm 47, which is movable on the vertical axis arm, is provided, and an air cylinder 48 is attached to the tip of the support arm.

From the air cylinder 48, there is a piston rod 49 which hangs slightly eccentrically from the center of the bottom surface of the sprue / runner accommodating tank 30, and a bucket 44 at the tip thereof.
Is installed. The bucket 44 has four claw pieces 45 that can grab a small amount of sprue runners by opening and closing.
And a sensor 46 for detecting the sprue runner inlet of the crusher 20 is attached to the tip.

Here, the horizontal axis arm 43 and the vertical axis arm 4
2 air cylinder support arm 47 and air cylinder 4
8, the movement of the bucket 44, the opening and closing of the claw pieces 45 of the bucket 44, the rotation of the sprue runner housing tank 30, and the like are all performed by pneumatic pressure, and each operation thereof is controlled by the sequence controller 50.

[0011]

[Effects of the Invention] The present invention is configured as described above, and the sprue / runner housing 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 and crushed sequentially. The sprue runner is not unevenly distributed in the tank because it can be put into the machine, and therefore the crusher is less likely to malfunction. Further, the operation of the entire system is automatically and smoothly carried out in addition to the transfer from the sprue / runner storage tank to the crusher, and almost no human labor 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), which is a crusher (20) for crushing the sprue runner and automatically supplying the crushed sprue runner to the pelletizing 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 its lower end, and a claw piece (45) of a bucket (44) grabs the sprue runner (31) and lifts it up, and carries it to a crusher (20) and throws it in. And the operation of rotating the sprue runner accommodating tank (30) by a constant angle each 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).