JPH042014Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an apparatus for separating and sorting molded products, particularly convergence magnets, taken out from an injection molding machine.

[Background of the idea]

Injection molding is widely used to manufacture parts for home appliances and office equipment, as it allows mass production of parts with complex shapes at low cost. Convergence magnets for electron guns in television cathode ray tubes are one such component, and are generally processed using injection molding machines.

Convergence magnets are made by molding nylon resin mixed with ferrite powder into a ring shape, and then magnetizing it in the appropriate places to give it a magnetic lens effect. Many pieces can be attached around a certain electron gun. As described above, precision is required in the molding and magnetization of the convergence magnet, which influences the performance of the cathode ray tube, and it is especially essential to minimize variations between parts.

For this reason, conventionally, for multi-cavity molded products molded with an injection molding machine, when breaking off a product with holes formed at the tips of multiple branch-like parts, the product broken off from the first branch was Products were sorted and sorted one by one into the first parts box, and the products broken off from the second branch were put into the second parts box.
Through this sorting, products molded at the same location within the cavity were grouped together into the same group, and variations between products were minimized.

However, this work requires a great deal of time and effort, and there is also the risk that sorting errors may occur, such as mixing products broken off from the first branch into the second product box.

[Purpose of invention]

In view of the above points, this idea was developed to automatically break off the parts taken out from the injection molding machine from the gate.
Moreover, it is an object of the present invention to provide a sorting device for punched injection molded products that can reliably sort parts broken off from the same gate into the same place.

[Structure of the idea]

In order to achieve the above object, this invention provides a pressing member for breaking off a plurality of perforated products formed in a branch-like manner on the non-product part in the advancing region of the movable arm that grips the non-product part. , a product guiding member is provided on the back side of the pressing member, the tip of which faces the hole of each separated product.

〔Example〕

This invention will be described below based on an embodiment shown in the accompanying drawings.

In the figure, 1 is an injection molding machine, and 2 is a movable arm for taking out parts molded by the injection molding machine 1. The movable arm 2 is movable above the injection molding machine 1 in a direction perpendicular to the cylinder axis of the injection molding machine 1. That is, the movable arm 2 is driven by a motor, a ball screw, etc. built into the drive unit 3, and can move in three directions: up and down, left and right, and front and rear.

4 is a gripper attached to the tip of the movable arm 2. The gripper 4 is for taking out the molded product 6 from the cavity 5 of the injection molding machine 1, and grips the non-product part (spool part or runner part) of the molded product 6 and moves together with the movable arm 2. do. The molded product 6 has a non-product portion consisting of a trunk portion 61 and a plurality of branch portions 62, and a hole product 63 is formed at each tip of the branch portion 62.
are formed so that they can be separated through narrow constrictions (gates). In addition, in this example, the molded product 6 is eight convergence magnets (see FIG. 2), and since the convergence magnets are made of nylon mixed with ferrite powder, the gate part has become extremely brittle.

Reference numeral 7 denotes a beam body for moving the movable arm 2 in a direction perpendicular to the cylinder axis of the injection molding machine 1, and is provided diagonally above the injection molding machine 1 to extend in a direction perpendicular to the cylinder axis. A support member 8 is provided at the end of the beam body 7 opposite to the injection molding machine 1, that is, at the moving end of the movable arm 2.

Reference numeral 9 denotes a pressing member vertically disposed below the support member 8. The pressing member 9 is a letter-shaped member installed at a suitable position in the forward movement area of the movable arm 2 (the movement area in the direction parallel to the cylinder axis of the injection molding machine 1) when the movable arm 2 has moved close to the end of the beam body 7. This is for breaking off the product 61 from the molded product 6.
That is, the pressing member 9 has its letter-shaped portion in contact with the perforated product 63 of the molded product 6 that is being held by the movable arm 2 and moves forward, and at the same time, the stem-like portion of the molded product 6 that is the non-product portion 61 and the branch-like portion 62 are arranged so that they can pass inside the letter-shaped portion. In addition, by adjusting the position of the screw fastening portion 81, the pressing member 9 can be adjusted in width to suit the shape of the molded product 6. Furthermore, it goes without saying that depending on the shape of the molded product 6, the overall shape of the pressing member 9 may be changed as appropriate.

Reference numeral 10 denotes a guide member for guiding the perforated product 63 broken off by the pressing member 9 to fall. The guide member 10 is a wire made of flexible brass wire, and its tip 10a is a perforated product 6.
The rear end portion 10b is formed into a cap shape, and is rotatably mounted on each head of a group of upright pins 11. The tip portions 10a of the guiding member 10 are arranged on the back side of the pressing member 9 (on the side opposite to the forward movement area of the movable arm 2) at positions corresponding to the centers of each hole of the perforated product 63 ( Figure 2). The tip portion 10a can be attached to the molded product 6 by appropriately rotating the rear end portion 10b that is attached to the head of the group of pins 11.
It can be adjusted according to the shape of the

12 is a base plate for fixing the group of pins 11. The base plate 12 is installed at a suitable position on the floor surface 13 below the pressing member 9, and a group of pins 11 are erected in a fixed arrangement on the upper surface thereof.

Next, the effect of this invention will be described.

The molded product 6 molded in the cavity 5 of the injection molding machine 1 is taken out by the gripper 4 of the movable arm 2 gripping the appropriate position of the trunk portion 61 or the branch portion 62, which is a non-product portion. Next, the movable arm 2 moves along the long beam body 7 to the injection molding machine 1.
The beam body 7 moves obliquely upward in a direction perpendicular to the cylinder axis of the injection molding machine 1, and once stops in front of the support member 8 provided at the moving end of the beam body 7. Movable arm 2
moves forward from this stop position in a direction parallel to the cylinder axis and approaches the pressing member 9 vertically disposed on the support member 8. When the movable arm 2 moves further forward, the molded product 6 whose non-product portion is gripped by the gripper 4 comes into contact with the perforated product 63 and the letter-shaped pressing member 9, and the remaining non-product portion, that is, the stem-like portion 61. The plurality of branch-like portions 62 pass near the pressing member 9 without coming into contact with each other. As a result, the perforated product 6
3 and the branch-like portion 62 break apart, and the perforated product 63 begins to fall.

At this time, at the center position of each hole of the perforated product 63,
Each distal end portion 10 of each disposed guiding member 10
a fits into the hole of the perforated product 63, the perforated product 63 falls downward along each guide member 10, and the corresponding pin 11 of the group of upright pins 11
Each falls on top of the other.

If the above process is repeated for molded products 6 that are produced one after another, the perforated products 63 molded at the same location in the cavity 5 will always be induced to fall onto the same pin 11.

[Effect of idea]

As explained above, this invention provides a pressing member for breaking off a plurality of perforated products arranged and formed in a branch shape on the non-product part in the forward movement region of the movable arm that grips the non-product part. The feature is that a product guide member is provided on the back side of the pressing member, the tip of which faces the hole of each separated product, so that products molded at the same location in the cavity of the injection molding machine are always kept in the same position. By dropping it onto the pins, it can be automatically sorted. Furthermore, since the perforated products are guided onto the upright pins by the guiding member at the same time as they are broken off from the non-product portion, there is no risk of missorting.

Therefore, it is possible to minimize the variation between products during molding, and at the same time, it has excellent effects such as labor saving in sorting work and easy control of product quality.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of the injection molding machine, and FIG. 2 is a front view showing a molded product, a pressing member, and a guiding member. 1... Injection molding machine, 2... Movable arm, 3...
Drive unit, 4...Gripper, 5...Cavity, 6
... Molded product, 61 ... Trunk part, 62 ... Branch-like part, 63 ... Hole product, 7 ... Beam body, 8 ... Support member, 9 ... Pressing member, 10 ... Guide member , 10a...Tip portion, 10b...Rear end portion, 11
... Pin, 12 ... Fixed plate, 13 ... Floor surface.

Claims (1)

[Scope of utility model registration request] A pressing member is provided in the forward movement area of the movable arm that grips the non-product part, and a pressing member is provided for breaking off a plurality of perforated products arranged and formed in a branch shape on the non-product part. A perforated product sorting device characterized in that a product guiding member is provided with a tip facing the hole of each product.