JPS58110231A - Work scraping-off device for injection molder - Google Patents

Abstract

PURPOSE:To perform a high-speed and reliable operation to scrape off a work, by a method wherein, in an injection molder, a scraper, reciprocably moving along an abutting surface of a moving die, is installed. CONSTITUTION:An eject pin 16 is caused to emerge from a surface of a moving die 5, and a molded work W is peeled from a surface of a moving die 5, and a molded work W is peeled from the moving die 5 for discharge. After said operation, a scraper 11 is momentarily lowered by an air cylinder 13, a straight surface 11A of the surface of the scraper 11 is lowered along the abutting surface of the moving die 5 to reliably remove the work W by means of a slope part 12. Namely, if the work W is even slightly peeled by means of the eject pin 16, the scraper 11 is inserted into a gap between the abutting surface S of the work W and the moving die 5, which results in performing a reliable operation to scrape off the work W.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece removal device for an injection molding machine.

Conventionally, this type of injection molding machine is known to be provided with, for example, an eject pin for removing a workpiece after injection molding.

However, this eject bin alone has the disadvantage that, although it is very rare, the work cannot be ejected if the work gets caught in the eject bin. In addition, using only the eject pin has the disadvantage that the workpiece is removed slowly and takes time. If the workpiece is not completely ejected before proceeding to the next process, the equipment will stop or a serious accident will occur, such as damage to the expensive equipment.

For these reasons, it is desired to provide an apparatus that can reliably remove the workpiece after injection molding.

The present invention has been made in view of the above-mentioned points, and has been made with the object of providing an injection molding machine that has a very simple configuration and is capable of quickly and reliably removing a workpiece.

In order to achieve this object, the present invention is provided with a scraper that is moved back and forth along the abutting surface of a movable die, and the scraper is configured to move integrally with the movable die.

An embodiment of the present invention will be described below based on the drawings. 1st
The figure shows the state in which the mold is closed, where ■ is a fixed die plate, 2 is a fixed die fixed to this fixed die plate 1, and 3 is a movable die plate, which is the fixed die plate 1.
It is attached to four stays 4 provided in the figure so as to be movable left and right in the figure. A wyh die 5 is fixed to the movable gooey plate 3 and is strongly pressed against the fixed die 2, and together with the fixed die 2 forms a cavity (not shown) for molding synthetic resin. Reference numeral 6 denotes a support member which is provided on the upper part of the movable goo plate 3 and is composed of two members, and is configured such that the vertical connection position of these two members can be adjusted by means of an adjustment screw 7. A scraper support piece 8 is fixed to the upper end of the support member 6. An adjustment rod 9 is inserted and attached to this support piece 8 so as to be movable left and right in the drawing, and a scraper 11 made of synthetic resin is attached to the tip of the adjustment rod 9 on the movable die side with a fitting 10. ing. A slightly curved slope portion 12 is formed at the lower end of the scraper 11 on the side opposite to the moving die. This slope portion 12
is effective for brushing off the workpiece W, which will be described later. Reference numeral 13 denotes an air cylinder that moves the scraper 11 up and down, and is mounted on the upper surface of the metal fitting 1°. Reference numeral 14 denotes an injection molding machine, and a hydraulic device (not shown) touches the tip of the nozzle 15 to the fixed die 2, and injects molten resin from the nozzle 15 into the cavity formed by the two dies. In this drawing, the injection molding machine is retracted to show the state after injection molding is completed.

Further, the lower end position of the scraper 11 is made to match the abutting surface S of the movable die 5 that abuts against the fixed die 2. This adjustment is carried out accurately and quickly by adjusting the position of the adjustment rod 9 on the support piece 8, and moreover, the adjustment rod 9 is attached to the support piece 8 accurately and quickly.
Even if the dimensions change, it can be freely accommodated. Further, the height of the scraper 11 can be freely changed using the adjusting screw 7.

Next, the operation will be explained. Now, after the nozzle touch of the injection molding machine 14 is completed, the injection molding machine 14 is moved back as shown in FIG. 1, and the mold is opened after a predetermined cooling time. To open the mold, as shown in FIG. 2, the movable guide plate 3 is moved to the left by a hydraulic device (not shown), and the movable die 5 is sufficiently separated from the fixed die 2. At this time, since the scraper 11 also moves together with the movable die 3, the positional relationship between the scraper 11 and the abutment surface S of the movable die 3 remains constant and always coincides with each other.

Thereafter, the eject pin 16 is projected from the movable die 5 onto the surface of the die 5 using an air cylinder (not shown), and the molded workpiece W is peeled off from the movable die 5. At the end of this operation, the scraper 11 is lowered by the air cylinder 13, the straight surface 11A on the back surface of the scraper 11 is lowered along the abutting surface of the movable die 5, and the slope part 12 ensures that the workpiece W is removed. That is, if the workpiece W is even slightly peeled off by the eject pin 16, the scraper 11 is inserted into the gap between the abutting surface S of the workpiece W and the movable die 5, thereby ensuring that the workpiece W is scraped off. The operation of the eject pin 16 and the operation of the scraper 11 are easily performed by sequence control of air cylinders, and it is effective to shorten this time difference as much as possible in order to shorten the entire process. Further, the scraper 11 mentioned above escapes the position of the eject pin 16, and is composed of two scrapers, for example, as shown in FIG. 3.

In the above-mentioned actual flow example, the scraper 11 may be one, and the cylinder may be hydraulic or pneumatic, but those that require a large force are hydraulic, and the others are pneumatic. is preferable from the viewpoint of productivity and ease of handling of the entire device. Furthermore, although the scraper 11 is positioned above, the same effect may be achieved if it is positioned laterally or downward and moved back and forth in the horizontal or vertical direction, respectively. Furthermore, the scraper 11 is installed so that its position can be adjusted both vertically and horizontally, but if the dimensions of the die do not change at all (a dedicated machine), it is fixed rigidly and there is no effect even if it is not adjustable. No problem. Historically, injection molding machines have been shown that can be moved back and forth, but the nozzle may also remain in contact. This method is more effective for high-speed molding.

As explained above, according to the present invention, since the scraper that moves integrally with the movable die is provided, the workpiece can be scraped off from the movable die quickly and reliably, and damage to IT due to malfunction due to incomplete scraping can be prevented. This has a great industrial effect in that it can be prevented from occurring.

[Brief explanation of the drawing]

The drawings show a suitable example of the present invention; Fig. 1 is a side view, Fig. 2 is a side view of the same when the mold is opened, and Fig. 3 is a full view of the main parts when the workpiece is removed. . 1...Fixed die plate, 2...Fixed die, 3...
・Moving die plate, 5...Moving die, 11...Scraper. 13...Air cylinder, 16...Eject pin,
W Figure 1 Sweets diagram

Claims (1)

[Claims] 1. A fixed die attached to a preliminary die plate, a backward moving die that comes into contact with and separates from this fixed die and is attached to a movable die plate, and these fixed die and movable die. an injection molding machine that injects molten resin into a cavity formed by the molding machine, and a member that scrapes off the workpiece molded by the cavity; A scraper is provided which moves integrally with the movable die of the bin, and the scraper is configured to move back and forth along the abutting surface of the fixed die button and the sliding die of (6). Workpiece removal device for injection molding machines.