JP2951305B2 - Local pressurized 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 local pressurized injection molding machine.

[0002]

2. Description of the Related Art Conventionally, in an injection molding machine, a screw is disposed in a heating cylinder so as to be rotatable and advanceable and retractable. In a measuring step, the screw is rotated and retracted to melt a resin in front of the screw. In the storing and filling (balance) process, the screw is advanced to inject the molten resin from the injection nozzle and fill the cavity of the mold.

On the other hand, the mold comprises a fixed mold and a movable mold, and the movable mold can be moved forward and backward by a mold opening / closing device so as to be brought into and out of contact with the fixed mold. Therefore, the movable mold is brought into contact with the fixed mold to close the mold, the movable mold is pressed against the fixed mold, and the mold is clamped. Thereafter, the resin is filled in the cavity space, and the resin is cooled. It becomes a molded product.
Then, separate the movable mold from the fixed mold and open the mold,
The molded article can be pushed down by ejecting the ejector pin from the fixed mold.

The resin injected from the injection nozzle enters a runner through a sprue, and is filled from the runner into the cavity through a gate. And
For example, when the gate is of a submarine type, a portion corresponding to the gate (hereinafter, referred to as a “gate portion”) is automatically folded and separated from the molded product when the molded product is pushed down.

[0005] However, after the gate portion is separated, a gate mark remains or flash occurs on the molded product. Therefore, an operation for removing gate traces, burrs, and the like is required, which increases the cost of the injection molding machine. Therefore, there has been provided a local pressurized injection molding machine in which a pressurizing pin is provided corresponding to a gate portion and the pressurizing pin is advanced to perform a gate cut. In this case, no gate mark remains or burrs occur.

[0006]

However, in the above-mentioned conventional local pressure type injection molding machine, a pressure pin for gate cutting and another pressure pin are provided to perform the gate cutting and to apply the molding to the molded product. Although it is conceivable to perform other processing by using, it is not possible to make the timing to start the gate cut and the timing to start the other processing different,
Also, the pressure for gate cutting and the pressure for other processing cannot be made different.

For example, when a pressing pin for gate cutting and another pressing pin are attached to a pressing plate and simultaneously advanced, a gate cut is performed, and shrinkage due to resin shrinkage during cooling is prevented. This makes it possible to prevent such problems, to make holes, to form thin portions, and to carry out compression molding when molding optical components. In this case, while it is necessary to start the gate cut at a relatively early timing in order to finish the surface of the gate mark cleanly, in order to prevent sink marks from occurring, the gate cut must be performed in accordance with the progress of cooling. It is preferable to press the gate, and it is necessary to start the gate cut at a relatively late timing.

However, since the pressing pin for gate cutting and other pressing pins are attached to a single pressing plate, the timing for starting the gate cutting and the timing for starting other processing are the same. I will. In addition, since one pressurizing cylinder is operated to advance the pressurizing plate, the pressurizing force of the gate cut is equal to the pressurizing force of another processing.

The present invention solves the problems of the conventional local pressurized injection molding machine, and when two or more types of processing are performed on a molded product, the timings at which each processing is started can be made different. It is an object of the present invention to provide a local pressurized injection molding machine.

[0010]

For this purpose, in a local pressurized injection molding machine according to the present invention, a cavity is provided between the stationary mold and the stationary mold so as to be able to freely contact with and separate from the stationary mold. A movable mold that forms a space, a first local pressure pin that extends through the movable mold and is disposed with the front end facing the gate, and extends through the movable mold and has a front end with a cavity. A second pressurizing pin disposed facing the space, a first pressurizing plate disposed rearward of the movable mold to advance the first local pressurizing pin, and a first pressurizing plate. Behind the pressure plate, a second pressure plate is provided so as to be able to freely contact and separate from the first pressure plate, and advances the second local pressure pin as it advances. A first advancing means disposed to advance the first pressure plate; A second advancing means arranged to advance the second pressure plate, and a timing for independently setting a timing for starting the advancement of the first local pressure pin and the second local pressure pin. Setting means.

In another local pressurized injection molding machine of the present invention, at least one of the first and second advancing means is provided with a vibrating means. In still another local pressurized injection molding machine of the present invention, a fixed mold, a movable mold that is disposed so as to be able to contact and separate from the fixed mold, and that forms a cavity space between the fixed mold, Extending through the movable mold,
A first local pressure pin disposed with the front end facing the gate, a second local pressure pin extending through the movable mold and disposed with the front end facing the cavity space; An ejector pin that extends through the mold and is disposed with its front end facing the cavity space, an ejector plate that is disposed behind the movable mold and moves the ejector pin forward, and a rear of the ejector plate. , A first pressurizing plate which is disposed to be able to contact and separate from the ejector plate to advance the first local pressurizing pin as it advances, and a first pressurizing plate behind the first pressurizing plate. A second pressure plate, which is disposed so as to be able to contact and separate from the plate and advances the second local pressure pin as it advances, and a first pressure plate which is disposed behind the movable mold, And ejector A first advancing means for advancing a rate, a second advancing means disposed behind the movable mold and advancing the second pressure plate, the first local pressure pin, and a second local pressure pin. And timing setting means for setting the timing of starting the forward movement of the pressure pin and the ejector pin independently of each other.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a local pressurized injection molding machine according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a press sleeve and an ejector rod according to the first embodiment of the present invention.

In the drawing, reference numeral 11 denotes a fixed mold mounting plate;
Denotes a fixed die, and the fixed die 12 is mounted on a fixed platen (not shown) via the fixed die mounting plate 11. Then, the injection device (not shown) is advanced in the injection process, and the tip of the injection nozzle (not shown) is brought into contact with the sprue bush 13 of the fixed mold 12.

On the other hand, a movable platen (not shown) is moved forward and backward (moves in the left-right direction in FIG. 1) by a mold opening / closing device (not shown) to move the movable mold 14 to the fixed mold 12.
Contact. To this end, the movable mold 14 is fixed to the movable platen via a movable mold mounting plate 15 and a spacer block (not shown). Then, the resin injected from the injection nozzle is supplied to the runner 1 via the sprue 18.
9 and from the runner 19 to the submarine type gate 20
Is filled into the cavity space 21 formed between the fixed mold 12 and the movable mold 14 through the cavity.

When the injection step is completed, a pressure-holding step is started, the resin pressure in the cavity space 21 is maintained, and the cooling of the resin is started. After a predetermined time, the movable mold 14 is not shown. The molded product is separated from the fixed mold 12 with the molded product left, and the molded product is pushed down by an ejector device (not shown). For this purpose, a sprue lock pin 25 and an ejector pin 26 are provided in the ejector device. The sprue lock pin 25 is disposed with its front end (the right end in FIG. 1) facing the sprue 18, and holds the molded product when the mold is opened to leave it on the movable mold 14 side. The ejector pin 26 is disposed with its front end facing the cavity space 21, the runner 19, etc., protrudes from the movable mold 14 after the mold is opened, and pushes down a molded product from the movable mold 14.

The head portions 25a, 2a formed at the rear ends of the sprue lock pin 25 and the ejector pin 26, respectively.
6a is pinched and fixed by the ejector plates 31, 32. The ejector plates 31 and 32 are supported so as to be able to move forward and backward, and advance the sprue lock pin 25 and the ejector pin 26 as they move forward (moving rightward in FIG. 1).

As shown in FIG. 1, a gap is formed between the ejector plate 32 and the rear end of the movable mold 14 at the retreat limit of the ejector pins 26.
The gap becomes a stroke of the ejector pin 26. Incidentally, a first local pressure pin 34 and a second local pressure pin 35 are provided in order to process the molded product and improve the quality. The first local pressure pin 34 is
The front end extends through the ejector plates 31, 32 and the movable mold 14, and the front end faces the gate 20. When the front end is advanced, the gate is cut, and the front of the first local pressure pin 34 (rightward in FIG. The resin filled in the disposal boss portion 21a formed in (1) is pushed into the cavity space 21. Further, the second local pressure pin 35 extends forward through the ejector plates 31 and 32 and the movable mold 14, and the tip faces the thick portion of the cavity space 21.
When the resin is advanced, the resin filled in the disposal boss portion 21b formed in front of the second local pressure pin 35 is pushed into the cavity space 21.

The first local pressure pin 34 and the second local pressure pin 35 have different effective strokes L _A and L _B from each other.
Is set to have The first local pressure pin 3
In addition to the fourth and second local pressure pins 35, other pressure pins having a further different effective stroke can be provided. The head portion 34a formed at the rear end (left end in FIG. 1) of the first local pressure pin 34 is sandwiched and fixed by the first pressure plates 36 and 37. effective stroke L _a is the same value as the movement stroke L _C of the first pressure plate 36, 37 in the clamping state of.

A stepped portion 35a formed at the rear end of the second local pressure pin 35 has a first pressure plate 36,
It is accommodated in a stepped portion accommodation chamber 38 formed between 37 and is movably arranged. And the stepped portion 35a
A rear pin portion 35b is formed at the rear (left side in FIG. 1) of the first pressure plate 37 so as to protrude therethrough. Here, the depth of the stepped portion accommodating chamber 38 value is greater than the thickness of the stepped portion 35a, the play L _D is formed.

Therefore, the effective stroke L _B of the second local pressure pin 35 is shorter than the effective stroke L _A of the first local pressure pin 34, and the first pressure plate 36,
When 37 is advanced, the first local pressure pin 34 starts to advance, and after a predetermined amount of advance, the second local pressure pin 35 can start to advance. In this case, the effective stroke L _A of the first local pressurizing pins 34 second local pressurizing pins 35
Is set so that the play L _D becomes larger than the difference ΔL from the effective stroke L _{B of} .

A second pressure plate 39 is disposed at the rear end of the first pressure plate 37 so as to be able to come into contact with and separate from the first pressure plate 37. 41 is provided so as to project rearward. A pressure sleeve 43 is provided so as to be able to freely contact and separate from the rear end surface of the sleeve 41. The pressurizing sleeve 43 is connected to a pressurizing cylinder (not shown) as a second advance means driven by an electromagnetic proportional pressure reducing valve (not shown) as a vibration means, and the pressure in the pressurizing cylinder is increased by the electromagnetic proportional pressure reducing valve. By controlling, the second pressure plate 39 is moved forward and backward through the pressure sleeve 43,
The local pressure pin 35 can be moved forward and backward.

The pressurizing cylinder has a small stroke and a high output specification. The pressure in the pressurizing cylinder is controlled by vibration / pressurizing program control, and the pressure is increased stepwise while vibrating. Thus, the second local pressure pin 35 can be advanced while being vibrated.
Also, after the second local pressure pin 35 is advanced to push the resin in the discarded boss portion 21b into the cavity space 21, the molded product can be pushed out by further advancing when the mold is opened. That is, the pressure sleeve 43 has an ejector function in addition to a pressure function.

On the other hand, an ejector rod 44 is disposed inside the pressure sleeve 43 so as to penetrate through the second pressure plate 39 and freely come into contact with and separate from the first pressure plate 37. The ejector rod 44 is connected to an ejector cylinder (not shown) serving as first advance means. The amount of oil supplied to the ejector cylinder is controlled by an electromagnetic proportional flow control valve (not shown) serving as a vibrating means, and the oil pressure is controlled by the electromagnetic proportional pressure reducing valve to move the first pressure plates 36 and 37 forward and backward. And the first local pressure pin 3
4 can advance and retreat. The timing setting means is constituted by the pressurizing cylinder and the ejector cylinder.

The first local pressure pin 34 advances to perform a gate cut, and is further advanced to push the resin in the boss 21a into the cavity space 21. At this time, the first pressure plate 36 comes into contact with the ejector plate 32, but when the mold is opened, the ejector rod 44 is further moved forward to thereby cause the first local pressure pin 34, the sprue lock pin 25, and the ejector pin 26. Can be advanced to eject the molded product. That is, the ejector rod 44 has a pressurizing function in addition to the ejector function.

Reference numeral 51 denotes the first pressure plate 36,
A pressing plate guide pin for guiding the 37 and the second pressing plate 39, 52 is an ejector return pin, and 53 is a pressing plate return pin. Next, the operation of the local pressurized injection molding machine having the above-described configuration will be described with reference to FIG.

FIG. 4 is a time chart of the local pressurized injection molding machine according to the first embodiment of the present invention. First,
When the movable platen is advanced and mold clamping is performed, subsequently, the injection nozzle is advanced and a nozzle touch is performed, and the molten resin is injected from the injection nozzle. The resin injected from the injection nozzle is sprue 18
After entering the runner 19 through FIG. 1, the runner 19 is filled into the cavity space 21 formed between the fixed mold 12 and the movable mold 14 through the submarine gate 20. At this time, the resin is also filled in each of the disposal boss portions 21a and 21b.

When the V / P switching is performed, a pressure-holding timer (not shown) starts measuring time to start pressure-holding.
When the pressure-holding timer finishes measuring time, a cooling timer (not shown) starts measuring time and cooling is started. In addition, V /
At the same time as the P switching, the first and second pressurization delay timers (not shown) start measuring time, and when the first pressurization delay timer finishes measuring time, the ejector cylinder is driven to move the ejector rod 44 forward, First pressure plate 37
Is abutted. Subsequently, the first pressure plate 3
When the first and second local pressure pins 34 and 37 start to move forward and the gate is cut, the cavity space 21 is cut off from the runner 19.

At this time, the resin in the cavity space 21 shrinks with cooling to reduce the specific volume. However, in the thick portion shown in FIG. I will. Then, when the second pressurization delay timer finishes measuring the time, the pressurizing cylinder is driven to advance the pressurizing sleeve 43 and abut the sleeve 41. Subsequently, the second pressure plate 39 starts to advance, and the second local pressure pin 35 also starts to advance, thereby pushing the resin in the discarded boss portion 21b into the cavity space 21.

In this case, by increasing the pressure in the pressurizing cylinder stepwise while oscillating, the second local pressurizing pin 35 can be advanced while oscillating. Further, the boss 2 is discarded by the second local pressure pin 35.
The resin in 1b can be easily pushed into the cavity space 21. The movement stroke L _C of the second pressure plate 39 becomes the effective stroke L _B of the second local pressure pin 35 as it is. The second local pressure pin 35
Can be advanced without vibrating.

As described above, even if the resin in the cavity space 21 contracts with cooling after the inside of the cavity space 21 and the runner 19 are shut off and the filling of the resin is stopped, the disposal boss portions 21a and 21b Resin can be pressed into the cavity space 21 by the first local pressure pin 34 and the second local pressure pin 35, so that the resin pressure in the cavity space 21 can be made uniform and the thick portion can be molded. The occurrence of sink marks in the product can be prevented.

The play L _D becomes smaller as the first pressure plates 36 and 37 advance, but the effective stroke L _{A of} the first local pressure pin 34 and the effective stroke L _A of the second local pressure pin 35 are reduced. Play L _D from the difference ΔL from the effective stroke L _B
Is set to be large, so that the play L _D does not become 0 before the second pressurization delay timer ends the timing, and the second local pressurizing pin 35 is set to the first pressurizing plate 36,
There is no pushing forward by 37.

As described above, since the advancing of the pressure sleeve 43 and the ejector rod 44 can be started at independent timings, the timing for starting the gate cut and the timing for starting the pressing can be made different. it can. In addition, since the gate can be cut by driving the ejector cylinder and pressurizing by driving the pressurizing cylinder, the pressing force at the time of gate cutting differs from the pressing force at the time of pressurizing. Can be controlled by Further, when there is an unnecessary pressurizing or ejecting operation for molding, the driving of the pressurizing cylinder and the ejector cylinder can be stopped only during that time.

Each of the pressurizing cylinder and the ejector cylinder is disposed behind the movable mold 14, and the first local pressurizing pin 34 and the second local pressurizing pin 3
5 can extend through the movable mold 14 so that gate cut marks, processing marks, and the like can be formed on the back surface of the molded product. Therefore, the appearance of the molded product can be improved.

Subsequently, the mold is opened, the ejector rod 44 is advanced, the first local pressure pin 34, the sprue lock pin 25 and the ejector pin 26 are advanced, and the molded product is ejected. As described above, the gate can be cut and pressed by the pressing sleeve 43 and the ejector rod 44, and not only the pressure can be applied but also the molded product can be protruded, so that the structure can be simplified. In opening the mold, the first local pressure pin 34,
Projection by the sprue lock pin 25 and the ejector pin 26 is started at the same timing.

When the mold is opened, a pause timer (not shown) starts measuring time, and after the pause timer finishes measuring time, mold clamping in the next cycle is started. Next, a second embodiment of the present invention will be described. FIG. 3 is a sectional view of a pressure sleeve and an ejector rod according to a second embodiment of the present invention.

In the drawing, reference numeral 43 denotes a pressure sleeve, and reference numeral 44 denotes an ejector rod. In this case, the pressing sleeve 43
Inside, the front end of the ejector rod 44 is removed. Further, the front end of the pressure sleeve 43 can be removed. Next, a third embodiment of the present invention will be described. FIG. 5 is a sectional view of a local pressurized injection molding machine according to a third embodiment of the present invention.

In the drawing, reference numeral 15 denotes a movable mold mounting plate;
Is a gate, 21 is a cavity space, 26 is an ejector pin, 31 and 32 are ejector plates, 34 is a first local pressure pin, 35 is a second local pressure pin, 43 is a pressure sleeve, and 44 is an ejector rod. . In this case, a first pressure plate 36 for fixing the first local pressure pin 34 is provided.
A pressure sleeve 43 is disposed so as to be able to freely contact with and separate from the rear end (left end in the figure) of the first and the third local pressure pin 35.
The ejector rod 44 is disposed so as to be able to freely contact and separate from the rear end surfaces of the second pressure plates 391 and 401 for fixing the ejector rods.

Therefore, the first local pressure pin 34 can be advanced by the pressure sleeve 43 and the second local pressure pin 35 can be advanced by the ejector rod 44. Next, a fourth embodiment of the present invention will be described. FIG. 6 is a sectional view of a local pressurized injection molding machine according to a fourth embodiment of the present invention.

In the figure, reference numeral 15 denotes a movable mold mounting plate;
Is a gate, 21 is a cavity space, 26 is an ejector pin, 31 and 32 are ejector plates, 34 is a first local pressure pin, 35 is a second local pressure pin, 43 is a pressure sleeve, and 44 is an ejector rod. . In this case, a first pressure plate 36 for fixing the first local pressure pin 34 is provided.
An ejector rod 44 is disposed so as to be able to freely contact and separate from the rear end (left end in the drawing) of the second pressure plate 2 372, and is separated from and connected to the rear end surfaces of the second pressure plates 392 and 402 for fixing the second local pressure pin 35. A pressure sleeve 43 is freely disposed.

Therefore, the second local pressure pin 35 can be advanced by the pressure sleeve 43, and the first local pressure pin 34 can be advanced by the ejector rod 44. It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0041]

As described above in detail, according to the present invention, in a local pressurized injection molding machine, a fixed die,
A movable mold that is disposed so as to be able to freely contact and separate from the fixed mold and forms a cavity space between the fixed mold and the movable mold; and a movable mold that extends through the movable mold and has a front end facing the gate. A first local pressure pin, and a second local pressure pin that extends through the movable mold and is disposed with the front end facing the cavity space.
A first pressure plate disposed behind the movable mold and for advancing the first local pressure pin; and a first pressure plate behind and behind the first pressure plate so as to freely contact and separate from the first pressure plate. A second pressure plate disposed to advance the second local pressure pin with the advance, and a first pressure plate disposed behind the movable mold to advance the first pressure plate. Advancing means, a second advancing means disposed behind the movable mold and advancing the second pressure plate, and advancing the first local pressure pin and the second local pressure pin. And timing setting means for setting the timing independently of each other.

In this case, the first pressurizing plate is advanced by the first advancing means, and the first local pressure pin is advanced, so that one processing can be performed on the molded product. The second pressing plate is advanced by the second advancing means, and the second local pressure pin is advanced, whereby other processing can be performed on the molded product. Then, even if the resin in the cavity space shrinks with cooling after the gate space is cut off by one processing and the cavity space and the runner are cut off, the first local pressure pin and the second local pressure pin As a result, the resin can be pushed into the cavity space, so that the resin pressure in the cavity space can be made uniform. Therefore, it is possible to prevent the molded product from sinking in the thick portion.

Further, since the timing at which the first local pressure pin and the second local pressure pin start to advance can be set independently of each other, the timing at which each processing is started can be made independent and different. Can be. Further, the pressing force in each processing can be made different. The first pressure plate and the second pressure plate are both disposed behind a movable mold, and the first local pressure pin and the second local pressure pin are both movable metal plates. Since it extends so as to penetrate the mold, gate cut marks, processing marks, and the like can be formed on the back surface of the molded product.
Therefore, the appearance of the molded product can be improved.

In another local pressurized injection molding machine of the present invention, at least one of the first and second advancing means is provided with a vibrating means. In this case, since at least one of the first local pressure pin and the second local pressure pin is advanced while vibrating, the processing is facilitated.
In still another local pressurized injection molding machine of the present invention, a fixed mold, a movable mold that is disposed so as to be able to contact and separate from the fixed mold, and that forms a cavity space between the fixed mold, A first local pressure pin that extends through the movable mold and is disposed with the front end facing the gate, and extends through the movable mold;
A second local pressure pin disposed with the front end facing the cavity space, an ejector pin extending through the movable mold and disposed with the front end facing the cavity space, and a rear side of the movable mold; An ejector plate for advancing the ejector pin; and an ejector plate disposed behind the ejector plate so as to be able to freely contact with and separate from the ejector plate, and for advancing the first local pressure pin with the advancement. A first pressing plate, and a second pressing plate disposed rearward of the first pressing plate so as to be capable of coming in contact with and separating from the first pressing plate. A pressure plate, a first advancing means disposed behind the movable mold, for advancing the first pressure plate and the ejector plate, and a second advancing means disposed behind the movable mold; Pressure A second advancing means for advancing the rate, and said first local pressurizing pin, timing setting means for setting one another by independent timing for starting the forward movement of the second local pressurizing pin and the ejector pin.

In this case, by the first advance means,
By advancing the first pressure plate and advancing the first local pressure pin, one process can be performed on the molded product, and the ejector plate is advanced and the ejector pin is advanced to form the molded product. The product can be protruded, and the second pressurizing plate can be advanced by the second advancement means, and the second local pressure pin can be advanced to perform other processing on the molded product. Further, since the timing of starting the advance of the first local pressure pin, the second local pressure pin, and the ejector pin can be set independently of each other, the timing of starting each processing and the timing of starting the protrusion can be set. They can be independent and different. Further, the pressing force in each processing can be made different.

[Brief description of the drawings]

FIG. 1 is a sectional view of a local pressurized injection molding machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a pressure sleeve and an ejector rod according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a pressure sleeve and an ejector rod according to a second embodiment of the present invention.

FIG. 4 is a time chart of the local pressurized injection molding machine according to the first embodiment of the present invention.

FIG. 5 is a sectional view of a local pressurized injection molding machine according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a local pressurized injection molding machine according to a fourth embodiment of the present invention.

[Explanation of symbols]

 12 Fixed mold 14 Movable mold 20 Gate 21 Cavity space 26 Ejector pin 34 First local pressure pin 35 Second local pressure pin

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-179625 (JP, A) JP-A-1-118423 (JP, A) JP-A-5-425 (JP, A) 72315 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B29C 45/56-45/57 B29C 45/37-45/40 B29C 45/64-45/70 B29C 45/80

Claims (3)

(57) [Claims] (A) a fixed mold; and (b) a movable mold that is disposed so as to be able to contact and separate from the fixed mold and forms a cavity space between the fixed mold and the movable mold. extend through the movable mold, and a first local pressurizing pin that is disposed to face the gate of the forward end, extending through said movable die (d), a front end to face the cavity disposed a second local pressurizing pin that is, (e) is disposed behind the movable mold, the first local pressurizing
A first pressure plate for advancing the pressure pin; and (f) a first pressure plate behind the first pressure plate.
The second station is arranged so as to be able to approach and separate from the rate,
A second pressure plate for advancing the parts pressurizing pin is disposed behind the movable mold (g), the first Ka圧Pu
A first advancing means for Ru advancing rate, is disposed behind the movable mold (h), the second Ka圧Pu
Second advancing means for Ru to advance the rate that it has a timing setting means for setting one another by independent timing for starting the advance of (i) the first local pressurizing pin and the second local pressurizing pins Characteristic local pressurized injection molding machine. Wherein said first, local pressurizing type injection molding machine according to claim 1, further comprising a low <br/> Kutomo one is vibrating means of the second advancing means. 3. A fixed mold, and (b) a movable mold which is disposed so as to be able to contact and separate from the fixed mold and forms a cavity space between the fixed mold and the movable mold. extend through the movable mold, and a first local pressurizing pin that is disposed to face the gate of the forward end, extending through said movable die (d), a front end to face the cavity disposed a second local pressurizing pin that is extends through (e) the movable mold, an ejector pin disposed to face the front end into the cavity, it is disposed behind the movable mold (f) , The ejector
An ejector plate for advancing the pin; and (g) an ejector behind the ejector plate.
The plate is provided so as to be able to freely contact and separate from the
1st pressure plate for advancing one local pressure pin
And (h) a first pressure plate behind the first pressure plate.
The second station is arranged so as to be able to approach and separate from the rate,
A second pressure plate for advancing the parts pressurizing pin is disposed behind the movable mold (i), the first Ka圧Pu
A first advancing means for Ru advance the rate and the ejector plate, is disposed behind the (j) the movable mold, the second Ka圧Pu
Second advancing means for Ru to advance the rate, and (k) said first local pressurizing pin, timing setting means for setting one another by independent timing for starting the forward movement of the second local pressurizing pin and the ejector pin A local pressurized injection molding machine characterized by having: