JPS60155422A - Injection molding machine - Google Patents

Abstract

PURPOSE:To also use one rod in the extruding operation of each plate, by making it possible to operate a plurality of support plates such as ejector plates in a mutually independent manner. CONSTITUTION:An ejector rod 11 is allowed to pass a piercing hole 6a and an insert hole 10a to bring the upper end surface thereof into contact with the lower surface of a first ejector plate 9 and subsequently extended to raise the first ejector plate 9 while a first ejector pin 12 is protruded from a mold plate 2 to demold a first molded product 14a. Next, the ejector rod 11 is contracted to allow the upper end surface thereof to position under an attachment plate 6 and the ejector rod 11 is moved from the left piercing hole 6a to a right piercing hole 6b. In the next step, the ejector rod 11 is extended to be inserted through the piercing hole 6b and further extended to raise a second ejector plate 10 and a second molded product is separated by a second ejector pin 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection molding machine in which a plurality of support plates such as ejector plates can operate independently of each other.

A conventional injection molding machine is provided with a first ejector plate and a second ejector plate, and each ejector plate is provided with an ejector pin protruding from each other. When taking out a product, the ejector pins are first positioned on the movable mounting plate side. There was one in which the first ejector plate was raised and the spool runner etc. was removed using an ejector pin.2The product was then ejected by raising the first ejector plate and pushing up the second ejector plate to activate the ejector pin. Komei 47-2
No. 5452). According to this conventional example, the operation of the second ejecting plate is dependent on the operation of the first ejecting plate L M
2. There was a problem that the operation of the ejector plate was restricted.

An object of the present invention is to enable a plurality of support plates such as ejector plates to function independently of each other.

In the injection molding machine of the present invention, a plurality of support plates are arranged at predetermined intervals. A plurality of plates refers to at least two, and among these two support plates, the one on the side of the moving side is the first support plate, and the one on the movable side is the one on the side of the plate, and the second support plate is the one on the side of the movable side. The gap between both plates is equal to or larger than the stroke of the second support plate. That is, the two plates are separated by a distance such that the first support plate does not follow the movement of the second support plate. Either an ejector pin or an operating rod projects from the first support plate, and the other protrudes from the second support plate and passes through the first support plate.

This operating rod includes an ejector pin, sprue lock pin,
Includes a sleeve for cutting the gate, a press rod that presses the molten resin in the runner, etc. In addition, for mounting on the movable side, at least two through holes are provided in the plate, and the insertion hole that communicates with one of the through holes is provided in the second support plate. Along the plate, the Shirorad is movable in a contracted state by a moving drive means.

The rod expands and contracts as the cylinder is driven, selectively penetrates one through hole and insertion hole, and the other through hole, and selectively pushes out the first support plate and the second support plate. It is possible.

Hereinafter, as an example of the present invention, 2
An injection molding machine that can separately take out different types of molded products will be explained based on the drawings.

In FIG. 1, a fixed mold plate 1 and a movable mold plate 2 are in contact with each other, and a cavity is formed on the opposing surfaces. This fixed side template is installed on the plate 3 for the fixed side, and the receiving plate 4 for the movable side template.
The movable side is attached to the plate 6 via the spacer block 5. A sprue bush 7 is provided on the side of the fixed mold plate 1, and an injection molding nozzle 8 is attached to the upper end opening of the sprue bush and is located opposite to the upper blade of the plate 3 so as to be movable up and down.

Incidentally, in the spacer block 5 of the movable template 20F, a first ejector plate 9 and a second ejector plate 10 are positioned facing each other with a predetermined gap therebetween. The upper first ejector plate 9 is located on a receiver 1115a provided in the spacer block 5, and can be raised and lowered by a Nijief Merorad 114C, which will be described later. A first ejector pin 12 and a sprue lock bin 13 are protruded from above this M1 ejector plate, and each pin passes through the receiving plate 4 and extends movably into the movable template plate 2. Molded product 1
It is possible to push out the sprue runners 14c attached to 4m and 4m.

Further, the lower second ejector grate 10 is mounted on the plate 6 and can be raised and lowered by the ejector rod 11. A second ejector pin 15 projects from the second ejector plate 9. The receiver passes through plate 4, and is possible 511Iill
The core 16 in the i-shaped plate 2 is inserted movably, and the second molded product 14b can be protruded from the upper end.

For installation, make a 6m through hole in the plate 6 that passes through it in the upper and lower blade direction.
, 6b are arranged in parallel, and an ejector rod 11 can freely pass through each through hole. The second ejector plate 10 also has an insertion hole 10a extending in the thickness direction and communicating with one of the through holes 6a and through which the ejector rod 11 passes. The ejector rod 11 is extendable and retractable by the operation of a cylinder 17 which is attached to the lower surface of a support plate 16 horizontally disposed on the lower blade of the plate 6, as shown in FIG. 1.2. Guide protrusions 16 m, 16 on support plate 160 @ part
m is attached to the lower surface of the plate 6 and is slidably fitted into a guide groove on the end surface of the holding plate 17. The end of the rod 19 for changing the position of the cylinder 18 is connected to the end of the support plate 16, and as the rod expands and contracts, the support plate 16 moves in the horizontal direction. It can be moved freely. With this movement, the ejector rod 11 can selectively face the through holes 6m and 6b in a contracted state.

Next, the effect will be explained.

The cavity is filled with synthetic resin from the nozzle 8, and after the filled synthetic resin is cooled and solidified, the mold plate 2 is inserted from the fixed side.
and move back the movable iIO such as the receiving plate 4. Therefore, among the molded products 14m and 14b, the first molded product 14m
When picking up 9 copies, first insert the ejector rod 11 into the left through hole 6a and the insertion hole 10m, as shown by the solid line in Figure 1.
The upper end surface of the ejector plate 9 is brought into contact with the lower surface of the first ejector plate 9. Then, as shown in FIG. 3, the cylinder 17 is driven to extend the ejector rod 11, raise the Mx ejector plate 9, and move the first ejector pin 12 onto the template 2.
．． Jt) The first molded product 14a and the sprue runner 14e'i attached thereto are removed from the template 2. Next, in order to take out the second molded product 14b'Ii, the ejector rod 11 is retracted so that the upper end s'i attachment is positioned at the lower blade than the lower surface of the plate 6, and the position changing rod 19 is retracted by the drive of the cylinder 18. Support plate 16? i-Move in the direction of the arrow.

The ejector rod 11 is moved from the left through hole 6a to the right through hole 6b, and the movement of the support plate 16 is stopped when it faces the through hole 6b. After that, the cylinder 17't is driven in the L direction shown by the chain line in FIG. 3, and the ejector rod 11 is extended and inserted through the through hole 6b.
Ejector plate) 10 (apply it to the lower surface of D, further extend the rod to raise the second ejector plate 10, protrude the second ejector bin 15 from the upper surface of the core 16, and
The molded product 14b is separated from the template 2.

In this way, expand and contract the position changing rod 11, slide the support plate 16'ft horizontally, and then move the ejector rod 1.
1 is alternatively positioned opposite to either t'L of the through hole 6a or 6b, the ejector/cr rod is expanded and contracted, and the first ejector plate 9 or the second ejector plate 10 is raised and lowered. Then, the molded parts are taken out one by one. Both ejector plays) 9. Which of 10 should be activated first?
Type of molded product 1 Select as appropriate considering work efficiency, etc.

- The order of operation can be changed arbitrarily without one plate limiting the operation of the other plate. Each J plate can be used for extrusion operation of each plate, simplifying the configuration.

[Brief explanation of the drawing]

Figure 1 is a sectional view. FIG. 2 is a sectional view taken along the line 1-1 in FIG. Figure tAa is a sectional view showing the operating state of the first ejector plate. l...Fixed side template, 2...Movable side template, 5...S Benisa block, 6...Movable side mounting plate, 6m, 6
b...Through hole, 9...First ejector plate, 1
0... Second ejector plate, 10m... Insertion hole, 11... Ejector rod, 12... First ejector pin, 14m, 14b... Molded product, 15... Second ejector bin, 16 ... Support plate, 17... Cylinder 418... Cylinder, 19... Position change rod. Written amendment to the above procedures (voluntary) March 7, 1985 Manabu Shiga, Commissioner of the Percent Office 1, Indication of the case, Patent Application No. 4899 filed in 1982, 2 Name of the invention, injection molding machine 3, Person making the amendment Relationship to the case Patent applicant 2-11-14 Kugahara, Ota-ku, Tokyo Substitute director of Sankyo Kasei Co., Ltd. Ryota Ohno 4th representative (Detailed description of the invention column (2) in the specification 11 Drawing 6, Contents of the amendment (1) "Retainer plate 17" on page 6, line 10 of the specification is corrected as "retainer plate 20J." (2) "Rod 11" on page 8, line 7 of the specification is corrected as "rod 19." (3) In the drawings, the symbols for each figure in Figures 1 to 3 will be corrected as indicated in red on the attached sheet.

Claims (1)

[Claims] As long as one does not interfere with the other's operation, l! at least two support plates arranged with +1 and -
an ejector pin protruding from the force support plate; an operating rod protruding from the other support plate; at least two through-holes through which the movable side is attached through the plate; and the movable side of both plates. The mounting is done by installing an X on the support plate located on the plate side, and using an insertion hole that communicates with one of the above-mentioned through holes and a moving drive means, the movable side mounting can be moved along the plate. The above-mentioned ejector pin or operation rod is provided with a rond that can be selectively penetrated through each of the through-holes, and a rond that can be penetrated through the through-holes, so that one of the ejector pins or the operating rod is connected to the other. It passes through the support plate on the force side, and the Rondo can selectively push out each of the support plates to the stationary template side. Micro-injection molding machine.