JPH1119982A - Method for dismounting molding from vertical rubber injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the automation of a molding cycle by a method in which after molten rubber being injected into a cavity, packed, solidified, and demolded, a slide plate is moved from a movable board to the outside, a molding is pushed up by an ejector plate, a sprue is gripped by a chuck, an ejector pin is separated, and the molding is dropped into a receiving part. SOLUTION: A molten rubber raw material is injected from nozzle 19 into a cavity formed by the upper mold 9 and lower mold 10 of a vertical rubber injection molding machine 1, packed, and solidified by vulcanization to make a molding, which is demolded. A slide plate 6 on a descending movable board 3 is moved outward by a transfer cylinder 7. Ejector pins 12, 12 is elevated, the ejector plate 10a of a lower mold 10 is pushed up to eject a molding 15. The sprue part 15a of the molding 15 is gripped by a chuck part 14a, when the end of the slide plate 6 passes just under the molding 15, the chuck part 14a is released, and the molding 15 is dropped on a conveyer 17 to be carried out. The automation of a molding cycle is enabled inexpensively and simply to reduce a cycle time and to cut manual operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for removing a molded product from a vertical rubber injection molding machine.

[0002]

2. Description of the Related Art In rubber injection molding, since a molded product is relatively soft and easily deformed, automation of an injection molding cycle including removal is more difficult than in the case of plastic molding or the like. It is difficult with a molding machine,
The mold has been pulled out of the movable plate with a slide plate, and the molded product has been taken out manually, or the molded product has been taken out using an expensive take-out device.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of removing a molded product of a vertical rubber injection molding machine which makes it possible to automate a molding cycle by utilizing a relatively inexpensive and simple removal mechanism.

[0004]

According to the present invention, an upper die is attached to the lower surface of a fixed plate of a vertical rubber injection molding machine, and the upper die is attached to the movable plate and the movable plate is removed from the movable plate. A lower mold is attached to the upper surface of a slide plate that can move between a position separated by a predetermined distance toward the upper side, the movable platen is raised, the lower mold is closed to the upper mold, and the mold is clamped, and the mold is closed. The cavity formed by the upper mold and the lower mold is injection-filled with a molten rubber raw material, the molten rubber raw material is solidified in the cavity to form a molded product, and the movable platen is lowered to form the molded product. The lower die holding the product is opened and lowered, and the slide plate, which is located on the movable platen and has the lower die holding the molded product attached to the upper surface thereof, is moved outward from the movable platen to a predetermined position. Move the distance and slide play The plurality of ejector pins waiting below the lower surface are raised to push up the ejector plate of the lower mold, and the molded product is ejected by the ejector pins of the lower mold interlocked with the ejector plate, and the ejected molding is performed. The sprue part of the product is gripped by the chuck part of the take-out mechanism that stands by above the lower mold, and then the ejector pins of the lower mold are retracted by retracting the plurality of ejector pins, and the chuck part is moved to the chuck part After separating the ejection pin of the lower mold from the gripped molded product, the slide plate is moved toward the movable platen, the chuck portion is opened, and the molded product is received in the lower molded product receiving portion. To a molded part of a vertical rubber injection molding machine.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an example of the structure of a vertical rubber injection molding machine having a take-out mechanism used for carrying out the method of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. 1 is a vertical rubber injection molding machine (mainly the mold clamping device side is shown), and 2 is a fixing plate thereof. Reference numeral 3 denotes a movable plate, which can be moved toward or away from the fixed plate 2 along a plurality of stays 5 by raising or lowering a ram 4a inserted into the mold clamping cylinder 4. Reference numeral 6 denotes a slide plate, which can be moved by the operation of the moving cylinder 7 while being guided by a plurality of guide members 8 between the upper surface of the movable platen 3 and a position outside the movable plate 3 by a predetermined distance. Reference numeral 9 denotes an upper mold attached to the lower surface of the fixed platen 2, and reference numeral 10 denotes a lower mold attached to the upper surface of the slide plate 6, which cooperate with each other when the mold is clamped to form a cavity (not shown). ) Is formed. 10a is an ejector plate of the lower mold 10, and 10b is an ejector plate 1
This is a protruding pin that is linked to 0a. Protruding pin 10
b is usually provided in plural according to the shape of the molded article. Reference numeral 11 denotes an ejector cylinder, and reference numeral 12 denotes an ejector pin attached to a tip of the ejector cylinder. The ejector cylinder 11 is fixed to a flange of the mold clamping cylinder 4 via a bracket 13. The ejector cylinders 11 are provided at two positions where both ends of the ejector plate 10a of the lower mold 10 can be pushed up by the ejector pins 12 when the piston 11a advances (see FIG. 3). Two notches 6a are provided to allow the ejector pins 12 to pass through. When the piston 11a of the ejector cylinder 11 is retracted, each ejector pin 12 is slightly lowered below the lower surface of the slide plate 6 (see FIG. 3).
To avoid interference with horizontal movement. The ejector plate 10a is constantly urged downward by a spring (not shown), and the protrusion is returned by this urging force.

[0006] Reference numeral 14 denotes a molded product take-out mechanism.
4a is the chuck part. The chuck portion 14a is driven by an air cylinder (not shown) or the like to
Is gripped or released. A commercially available member can be purchased and used for the chuck portion.
An intermediate member 14b is located between the chuck portion 14a and the height adjusting member 14c and connects them. The height adjusting member 14c is attached to the fixed board 2 via a bracket 16. The height adjusting member 14c is for adjusting the position of the chuck portion 14a in the height direction, and can be easily and inexpensively constituted by screws and nuts as is apparent from the drawing. As described above, the main function of the take-out mechanism 14 is only the operation of gripping or releasing the molded product in the chuck portion, and does not require a complicated movement or structure. Reference numeral 17 denotes a receiving portion for the molded product 15 to be dropped. If the molded product receiving portion 17 is constituted by a conveyor, the molded product 15 can be automatically carried out to a predetermined place.
Reference numeral 18 denotes a heating cylinder of the injection device, and 19 denotes a nozzle provided at a tip of the heating cylinder.

Next, an embodiment of a method for removing a molded product of a vertical rubber injection molding machine according to the present invention using the apparatus as described above will be described. The upper mold 9 attached to the lower surface of the fixed platen 2 of the vertical rubber injection molding machine 1 is closed by lowering the lower mold 10 attached to the upper surface of the slide plate 6 located on the movable platen 3 by raising the ram 4a. I do. Injection device heating cylinder 18
Is lowered to bring the nozzle 19 into contact with a sprue bush (not shown) of the upper mold 9. After the mold is closed, the oil pressure in the mold clamping cylinder 4 is increased to a predetermined mold clamping pressure. Upper mold 9
The molten rubber material is injected and filled from the nozzle 19 through the sprue bush of the upper mold 9 into the cavity formed by the mold clamping of the lower mold 10. The molten rubber raw material is supplied with heat from a mold and solidifies by vulcanization with the passage of time to become a molded product in the cavity. Lower the ram 4a,
The movable platen 3 is lowered to open the mold. At this time, the molded product 15 with the sprue portion 15a is held on the lower mold 10 side.

The slide plate 6 located on the lowered movable platen 3 is moved outward (to the left in FIG. 1 or FIG. 2) from the upper surface of the movable platen 3 by operating the moving cylinder 7. The slide plate 6 is at the forward limit position, that is, the lower mold 1
After confirming that it has reached the removal position of the molded article 15 of the ejector cylinder 11, the piston 11a of the ejector cylinder 11, 11
11a is driven upward. The ejector pins 12, 12 provided at the distal ends of the pistons 11a, 11a and waiting below the lower surface of the slide plate 6, rise, push up the ejector plate 10a of the lower mold 10, and move downward with the ejector plate 10a. The plurality of protruding pins 10 b of the mold 10 protrude the molded product 15.

The chuck portion 14a whose height has been adjusted to a position suitable for gripping the sprue portion 15a of the molded product 15 above the lower mold 10 by the height adjusting member 14c of the molded product take-out mechanism 14. Is driven to grip the sprue portion 15a of the molded product 15. Then the pistons 11a, 11a
To lower the ejector pins 12 and 12. The ejector plate 10 is actuated by the urging force of the spring.
a is retracted, and the molded product 15 held by the chuck portion 14a is separated from the plurality of ejection pins 10b. After confirming that the pistons 11a have reached the lower limit, the slide plate 6 is pulled back to the movable platen 3 by the retraction drive of the movable cylinder 7. When the end of the slide plate 6 (the left side in FIG. 1 or FIG. 2) passes directly below the molded product 15, the chuck portion 14a of the take-out mechanism 14 is opened, and the gripped molded product 15 is dropped. The molded product dropped onto the conveyor 17 as the molded product receiving portion is carried out. The process returns to the initial mold closing process again, and the automatic molding cycle is continued.

[0010]

According to the present invention, the mold is pulled out from the movable plate, the molded product is protruded, gripped by the take-out mechanism, and the mold is pulled back on the movable plate. The method of taking out a molded product, such as dropping the molded product, makes it possible to automate the molding cycle inexpensively and simply, thereby shortening the cycle time and reducing labor.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an apparatus used for carrying out the method of the present invention.

FIG. 2 is a view in another operating state of FIG. 1;

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical rubber injection molding machine 2 Fixed board 3 Movable board 4 Mold clamping cylinder 6 Slide plate 7 Moving cylinder 9 Upper die 10 Lower die 10a Ejector plate 10b Protrusion pin 11 Ejector cylinder 12 Ejector pin 14 Extraction mechanism 14a Chuck part 15 Molded product 15a Sprue portion 17 Conveyor (molded product receiving portion) 18 Heating cylinder (injection device) 19 Nozzle (injection device)

Claims (1)

[Claims] An upper mold is attached to a lower surface of a fixed plate of a vertical rubber injection molding machine, and an upper surface of a slide plate movable between the movable plate and a position separated from the movable plate by a predetermined distance outward. The lower mold is attached to the upper mold, the lower mold is closed to the upper mold, and the mold is closed. The molten rubber raw material is filled in a cavity formed by the upper mold and the lower mold. By injection-filling, solidifying the molten rubber raw material in the cavity to form a molded product, lowering the movable platen, opening the lower mold holding the molded product, and lowering the movable platen. A plurality of ejectors that are located above the movable platen and move the slide plate, on which the lower mold holding the molded product is mounted, on the upper surface by a predetermined distance outwardly, and waiting below the lower surface of the slide plate; Raise the pin The ejector plate of the lower mold is pushed up, and the molded product is ejected by the ejector pin of the lower mold interlocking with the ejector plate, and the sprue portion of the ejected molded product is waited above the lower mold. The ejector plate of the lower mold is gripped by the chuck portion of the take-out mechanism, and then the ejector plates of the lower mold are retracted by retracting the plurality of ejector pins. And moving the slide plate toward the movable platen, opening the chuck portion and dropping the molded product to a lower molded product receiving portion. How to remove molded products.