JPH07115396B2 - C-type frame for mold clamping of injection molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame having a C-shaped side surface and used for a mold clamping device of an injection molding machine.

[0002]

2. Description of the Related Art Most C-shaped frames so far are made of steel plates, and the left and right side frames and upper frame formed by cutting and the front frame between the side frames are integrally connected by welding. Is being manufactured.

[0003]

Therefore, the C-shaped frame is laborious to manufacture and requires many days, so that the structure is simple but the productivity is low, and the cost is high.

Therefore, in some cases, a C-shaped frame is produced by casting to try to improve the productivity. However, the casting is inferior in tensile strength and compression strength to the steel sheet, and the elastic modulus is small, so that the bending amount is reduced. When trying to make it small, each frame is inevitably made thick.

This thickening of the frame causes an increase in weight and also an increase in size. For this reason, it is against the weight reduction and downsizing of the injection molding machine, so that the adoption of the C-shaped frame by casting is limited to some mold clamping devices.

The present invention was conceived in order to solve the problems of the above-mentioned conventional C-shaped frame by casting, and the object thereof is to make it lighter and smaller than the conventional one, and to make it vertical. C type frame, which is often limited to
An object of the present invention is to provide a C-frame for mold clamping having a new structure that can be adopted as a horizontal mold-clamping frame.

[0007]

The features of the present invention according to the above-mentioned object are that a pair of left and right side frames and a mold clamping cylinder are formed so as to project on the upper side surfaces of the side frames and the ends are vertical. A body frame having a required width consisting of an upper frame and a front frame located between the insides of the side frames is integrally formed by casting, and a base is bolted to the lower end of the body frame to form a C-shaped frame. ,
A pair of steel columns extending from the top of the main body frame to the bottom of the base is provided at the connecting portion between the both side frames and the front frame.

In such a C-shaped frame, since the strength of the main body frame is increased by the columns on both sides as compared with the case of only casting, it can be installed vertically on the machine base of the injection molding machine through the base. Alternatively, it can be installed laterally on the machine base of the injection molding machine by a mounting portion provided at a required position on the back side surface.

[0009]

[Operation] In the above structure, the pair of columns penetrating the side frame can receive the tensile force acting on the body frame, and the load applied to each frame forming the body frame is reduced. Even if the wall thickness is reduced and the weight is reduced, it can withstand the mold clamping force.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 in the drawing denotes a main body frame having a required width by casting, which is a pair of left and right side frames 2, 2 and upper frames 3, 3 projectingly formed on the upper side surfaces of the side frames 2, 2.
And each frame of the front frame 4 located between the insides of the side frames 2 and 2 is integrally formed by casting.

Each end of the upper frames 3, 3 is formed in a vertical mold clamping cylinder 5, 5 and also the side frames 2, 2
The connecting portion between the front frame 4 and the front frame 4 is formed thick, and the through holes 6 and 6 penetrating the main body frame 1 vertically are formed therein.
Is formed.

At the lower end of the main body frame 1 as described above, a casting base 7 having through holes 8 serving as extensions of the above insertion holes 6 at symmetrical positions is horizontally attached by a required number of bolts 9. Thus, a C-shaped frame in which the upper frames 3 and 3 and the base 7 project on one side of the side frames 2 and 2 is formed.

Reference numeral 10 is a column made of a round steel material, and both ends thereof are formed on a screw shaft 11. The column 10 is inserted into the through holes 6 of the side frames 2 and 2 and the through hole 8 and penetrates the body frame 1 from above to the bottom of the base.

Further, a washer 12 is provided on a screw shaft 11 of the column 10 projecting from the upper surface of the main body frame 1 and the bottom surface of the base, and a nut 13 is screwed thereto. It is firmly fixed to both 1 and the base 7.

Reference numeral 14 denotes a mounting portion provided at a required position on the back side surface of the side frame 2, and a bolt hole is bored although not shown in the drawing. Reference numeral 15 is a piston of the mold clamping cylinders 5 and 5, which has a rod 16 at its upper end, and a movable plate 17 is horizontally attached to both pistons at its lower end.

Reference numeral 18 denotes a die mounting plate provided on the base 7. Although not shown in the figure, the mold is separately attached to both the die mounting plate 18 and the movable plate 17.

As shown in FIG. 4, the C-shaped frame having the above-described structure is such that the main body frame 1 is made vertical through the base 7 and the machine base 1
9 can be installed. In this case, the base 7 is bolted to the machine base 19 to fix the C-shaped frame on the machine base.

Further, according to the specifications as a normal vertical injection molding machine, the injection device 20 is vertically arranged in the center between the upper frames 3 and 3. The injection device 20 is connected to the pistons 15 and 15 of the mold clamping cylinders 5 and 5 and the rod 16 is connected to the piston of the nozzle touch cylinder 21 provided on the side of the injection device 20, although details thereof are omitted. Is
After the injection device 20 is lowered by the nozzle touch cylinder 21, mold closing and mold clamping can be performed by the mold clamping cylinders 5 and 5.

In some cases, as shown by the chain line, the injection device 20 can be arranged horizontally and used for two-color molding or the like. At this time, the nozzle insertion hole may be provided in the front frame 4 in advance.

FIG. 5 shows a case where the C-shaped frame is applied to a mold clamping device of a horizontal injection device.
With the side frame 2 on the lower side, the main body frame 1 is laterally placed on one side of the machine base 19, and the mounting portion 1 on the side surface of the back is attached.
4, 4 and 14 are bolted to the machine base side and fixed.

The injection device 20 is mounted on another portion of the machine base 19 and provided on the base side. Depending on the case, the relationship between the C-shaped frame and the injection device may be set horizontally on the machine base in the same manner as in FIG.

[0022]

As described above, in the C-shaped frame of the present invention, which is formed by penetrating a pair of steel columns from above the main frame to the bottom of the base, even if the main frame is cast, the columns As a result, the tensile strength increases, the elastic modulus increases, and the bending decreases. As a result, the pair of left and right side frames forming the main body frame, the front frame located between the upper frame and the inner side frames, etc. The thickness can be reduced as compared with the case of casting alone to reduce the weight, and the size can be reduced.

Further, since the injection cylinder, the mounting portion, etc. can be cast integrally with the main body frame, the number of steps is less than that in the case of manufacturing a C-shaped frame by welding a steel plate, and the quality control is facilitated, so that variations in strength are caused. Also, the cost can be reduced because mass production is possible.

Furthermore, it can be installed vertically or horizontally on the machine base via the mounting portion on the back side of the base or side frame, and in addition to the vertical mold clamping device, the frame of the horizontal mold clamping device is also provided. Since it can be used as, it has a wider application range than the conventional C-type frame.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line BB in FIG. 2 of a C-frame for mold clamping of an injection molding machine according to the present invention.

FIG. 2 is a plan view with a half section taken along the line AA in FIG.

FIG. 3 is a front view of the same.

FIG. 4 is a side view of a vertical injection molding machine configured by using the C-type frame for mold clamping according to the present invention.

FIG. 5 is a side view of a horizontal injection molding machine which is similarly configured using a C-frame for mold clamping.

[Explanation of symbols]

 1 Main Frame 2 Side Frame 3 Upper Frame 4 Front Frame 5 Molding Cylinder 6 Insertion Hole 7 Base 8 Through Hole 10 Strut 11 Screw Shaft 12 Washer 13 Nut 14 Mounting Part 15 Piston 16 Rod 17 Movable Plate 18 Form Plate 19 Machine 20 Injection device

Claims (3)

[Claims] 1. A position between a pair of left and right side frames, an upper frame projectingly formed on an upper side of a front side of the side frame and having a vertical end portion formed in a mold clamping cylinder, and an inner side of the side frame. A body frame having a required width consisting of a front frame is integrally formed by casting, and a base is bolted to the lower end of the body frame to form a C-shaped frame, and a connecting portion between both side frames and the front frame. To
A C-shaped frame for mold clamping of an injection molding machine, comprising a pair of steel columns extending from above the main body frame to the bottom of the base. 2. The C-shaped mold for clamping an injection molding machine according to claim 1, wherein a main body frame of the C-shaped frame is vertically installed on a machine base of the injection molding machine through a base. flame. 3. The injection molding according to claim 1, wherein the main body frame of the C-shaped frame is laterally installed on the machine base of the injection molding machine by a mounting portion provided at a required position on the back side surface. C-shaped frame for machine clamping.