JP2003266478A - Device for supporting stationary mold of molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a mold mount face from tilting even during adjusting the temperature of a mold by detecting the gradient of a mold mount face of a fixed platen and controlling a coolant. <P>SOLUTION: This device comprises the mold mount face on which a stationary mold is to be mounted and a member for supporting the stationary mold equipped with a coolant path 18 for a coolant to pass through, a gradient detecting device for detecting the gradient of the mold mount face and a control device for making the mold mount face perpendicular by controlling the coolant on the basis of the gradient of the mold mount face. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed mold supporting device for a molding machine.

[0002]

2. Description of the Related Art Conventionally, in an injection molding machine, a screw is moved forward in a heating cylinder to inject a molten resin at a high pressure to fill a cavity space of a mold device, In, the molded product is molded by cooling and solidifying the resin.

To this end, the mold apparatus comprises a fixed platen having a fixed mold attached thereto, a movable platen having a movable mold attached thereto, and a toggle mechanism for moving the movable platen forward and backward. Is operated to move the movable platen forward and backward, so that the mold apparatus can perform mold closing, mold clamping, and mold opening.

Then, when the mold clamping of the mold device is performed,
The injection device is moved forward, and the nozzle of the heating cylinder is pressed against the sprue bush disposed on the back surface of the fixed mold through the nozzle passage hole formed in the fixed platen to be brought into close contact with the sprue bush. Subsequently, the molten resin is injected from the nozzle under high pressure, passes through the sprue bush and the sprue, and is filled into the cavity space formed on the mating surface of the fixed mold and the movable mold. ing.

Here, in order to mold a high-quality molded product, it is required to appropriately control the fluidity of the resin at the time of filling, the cooling rate of the resin in the cavity space, and the like.
Therefore, in the mold apparatus, for example, to heat the sprue bush and the sprue, or to cool the cavity, to form a complicated passage of the heat medium or refrigerant,
It also has a heater. Thereby, the temperature of each part of the mold device is strictly adjusted, the fluidity of the resin, the cooling rate, etc. are appropriately controlled, and a high quality molded product is molded. Therefore, the temperature of the mold device during the operation of the injection molding machine, that is, during the mold temperature control is considerably higher than the temperature when the injection molding machine is stopped, that is, during the cold state of the mold. 160-200 for resin injection molding
It is about [° C].

[0006]

However, in the conventional injection molding machine, since the temperature of the mold device during the mold temperature control is high, the temperature of the fixed platen to which the fixed mold is attached also rises. , The fixed platen is thermally deformed,
It may tilt toward the nozzle side.

Usually, the resin injected at high pressure does not leak from the mating surface of the fixed mold and the movable mold.
The fixed mold and the movable mold are clamped with a strong force. Therefore, the fixed platen that supports the fixed mold is required to have a high deformation strength, and thus has a large thickness, that is, the distance between the mold mounting surface and the nozzle side surface is long.

Further, during mold temperature control, the mold mounting surface receives the heat of the fixed mold and its temperature rises to a high temperature, and the temperature rise on the side surface of the nozzle is small and remains low. In short, the temperature around the die on the die mounting surface becomes particularly high. Further, since the nozzle passage hole is formed, the surface area is different between the nozzle side and the die mounting surface side, which causes a difference in thermal expansion. Therefore, the thermal expansion of the die mounting surface increases.
In this case, since the lower end of the fixed platen is usually fixed to the frame by bolts, only the die mounting surface extends upward due to thermal expansion, and the entire fixed platen inclines toward the nozzle.

FIG. 2 is a side view of the conventional fixed platen when the mold is cold, and FIG. 3 is a side view when the lower end of the conventional fixed platen is not fixed during mold temperature control.
FIG. 5 is a side view when the lower end of the fixed platen is fixed during the conventional mold temperature control, and FIG. 5 is a side view when the conventional fixed platen is inclined during the cold mold.

In FIG. 2, reference numeral 101 denotes a fixed platen whose lower end is fixed to the upper surface of a frame 104 by a bolt (not shown), which includes a mold mounting surface 102 on which a fixed mold 105 is mounted and a nozzle side surface 103 on the opposite side. It is provided with a roughly rectangular thick plate shape. Also,
The stationary platen 101 has a heating cylinder nozzle 1
A nozzle passage hole (not shown) through which 07 passes and a plurality of, for example, four tie bar insertion holes (not shown) into which tie bars (not shown) are inserted are formed. Reference numeral 106 denotes a mating surface (parting surface) of the fixed mold 105 that comes into contact with a movable mold (not shown).

Reference numeral 108 denotes a central axis line of the nozzle 107, which substantially coincides with central axis lines 109 of the fixed platen 101 and the fixed mold 105. The nozzle 107 is moved from the right side to the left side in FIG. 2 on the central axis 108, and is fixed to the mold mounting surface 102.
Pressed on 5. The central axis 108 and the central axis 109 are parallel to the upper surface of the frame 104, and
It is horizontal.

Here, when the die is cold, the fixed platen 101 is vertically attached to the upper surface of the frame 104 as shown in FIG. 2, and the die attachment surface 102 and the nozzle side surface 103 are attached to the frame 104. It is perpendicular to it. In addition, the mating surface 106 of the fixed mold 105 mounted on the mold mounting surface 102 is also the frame 10 in the same manner.
It is perpendicular to 4.

When the mold temperature is controlled, the fixed mold 1
The temperature of 05 rises and rises, and the die mounting surface 102 of the fixed platen 101 also receives the heat of the fixed die 105 and rises in temperature. In this case, since the fixed platen 101 is thick, the temperature of the nozzle side surface 103 does not rise as much as the temperature of the mold mounting surface 102 and remains low.

In addition, since the nozzle passage hole is formed, the wall thickness is different, and the thermal expansion amount of the die mounting surface 102 is larger than the thermal expansion amount of the nozzle side surface 103, and the lower end portion of the stationary platen 101 is formed. Assuming that the fixed platen 101 is not fixed to the frame 104, the fixed platen 101 deforms symmetrically with respect to the central axis 108, as shown in FIG.

Here, in the fixed mold 105,
Since heat escapes to the fixed platen 101, the temperature of the surface on the fixed platen 101 side, that is, the back surface, is
It is lower than the temperature of 06. Therefore, the mating surface 1
Since the temperature of 06 is higher than the temperature of the surface on the fixed platen 101 side, the thermal expansion amount of the mating surface 106 becomes larger than the thermal expansion amount of the back surface. Therefore, the fixed mold 105 also deforms symmetrically with respect to the central axis 108, as shown in FIG. The temperature of the back surface of the fixed mold 105 is substantially equal to the temperature of the mold mounting surface 102, and the coefficient of thermal expansion of the material of the fixed mold 105 is also substantially the same as that of the material of the stationary platen 101. The thermal expansion amount of the back surface of the mold 105 is substantially equal to the thermal expansion amount of the mold mounting surface 102 of the fixed platen 101.

In this case, the central axis 108 of the nozzle 107
Is substantially coincident with the central axis 109 of the fixed platen 101 and the fixed mold 105, and the mating surface 106 of the fixed mold 105 is not inclined and is slightly deformed. The mold can be opened, and moreover, the nozzle 107 can be pressed and brought into close contact with the sprue bush arranged on the back surface of the fixed mold 105.

However, in practice, since the lower end of the fixed platen 101 is fixed to the frame 104, the fixed platen 101 is entirely inclined toward the nozzle 107 side as shown in FIG. Will end up. In this case, the central axis 108 of the nozzle 107 is displaced from the central axis 109 of the fixed platen 101 and the fixed mold 105, and the mating surface 106 of the fixed mold 105 is inclined. Therefore, the mold closing, mold clamping, and mold opening of the mold device cannot be smoothly performed, and the resin filled in the cavity space may leak from the mating surface 106 or the mold device may be damaged. . In addition, it becomes impossible to press the nozzle 107 against the sprue bush arranged on the back surface of the fixed mold 105 to bring them into close contact. Note that FIG.
For convenience of explanation, the deformation of the member due to thermal expansion is exaggerated in FIGS.

Therefore, conventionally, a heat insulating material is provided between the fixed mold 105 and the fixed platen 101 to make it difficult for the heat of the fixed mold 105 to be transferred to the fixed platen 101, or as shown in FIG. As described above, the fixed platen 101
It was attached to the frame 104 by inclining it to the opposite side of the nozzle 107 in advance.

However, the fixed mold 105 and the fixed platen 1
If a heat insulating material is provided between the fixed mold 105 and
Will be inclined, and the parallelism between the mating surface 106 and the mating surface of the movable mold (not shown) will change.

Further, as shown in FIG. 5, when the stationary platen 101 is attached to the frame 104 while being tilted in advance on the opposite side of the nozzle 107, the temperature of the mold during temperature control is changed by changing the mold device. It will not be possible to deal with the case. For example, if the temperature during mold temperature control is the assumed temperature, the state shown in FIG. 2 is obtained, but if the temperature during mold temperature control is below the assumed temperature, the nozzle 1
If the temperature at the time of mold temperature control becomes equal to or higher than the expected temperature, as shown in FIG. 4,
It is inclined toward the nozzle 107 side.

The present invention solves the above conventional problems,
To provide a fixed mold supporting device for a molding machine in which the mold mounting surface of the fixed platen is detected and the refrigerant is controlled so that the mold mounting surface does not tilt even during mold temperature control. With the goal.

[0022]

Therefore, in the fixed mold supporting device of the molding machine of the present invention, a fixed mold having a mold mounting surface to which the fixed mold is mounted and a refrigerant flow path through which the refrigerant flows. A support member, an inclination detection device that detects the inclination of the mold mounting surface, and a control device that controls the refrigerant based on the inclination of the mold mounting surface to make the mold mounting surface vertical. Have.

In the fixed mold supporting device of another molding machine of the present invention, the tilt detecting device further detects deformation of the fixed mold supporting member.

In the fixed mold supporting device of still another molding machine of the present invention, the inclination detecting device is a strain gauge attached to a side surface of the fixed mold supporting member.

In the stationary mold supporting device of still another molding machine of the present invention, the flow rate or temperature of the refrigerant is further controlled to be supplied from the refrigerant supply device to the refrigerant flow path.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the fixed mold supporting device of the present invention can be applied to various devices and applications, but in the present embodiment, for convenience of description, a case of being applied to an injection molding machine will be described. .

FIG. 6 is a side view showing the outline of the injection molding machine according to the embodiment of the present invention.

In the figure, 10 is an injection molding machine as a molding machine, 50 is an injection device, 30 is a mold clamping device arranged to face the injection device 50, 34 is the injection device 50 and the mold clamping device 30. The molding machine frame 70 for supporting the injection molding machine frame 70 is supported by the molding machine frame 34 and
An injection device frame that supports 0, 63 is a guide arranged in the longitudinal direction of the injection device frame 70, and 39 is a mold device including a fixed mold 36 and a movable mold 35.

The ball screw shaft 65 is rotatably supported by the injection device frame 70, and one end of the ball screw shaft 65 is connected to the motor 64. Further, the ball screw shaft 65 and the ball screw nut 66 are screwed together.
The ball screw nut 66 and the injection device 50 are connected to each other via a spring 67 and a bracket 68. Therefore, when the motor 64 is driven in the forward and reverse directions, the rotational movement of the motor 64 is converted into a linear movement by the combination of the ball screw shaft 65 and the ball screw nut 66, that is, the ball screw mechanism 71, The linear motion is transmitted to the bracket 68. Then, the bracket 68 is moved in the left-right direction in the drawing along the guide 63, and the injection device 50 is advanced and retracted.

A heating cylinder 51 is fixed to the bracket 68 toward the front (to the left in the drawing),
An injection nozzle 54 is arranged at the front end (left end in the figure) of the heating cylinder 51. Then, the heating cylinder 51
A hopper 53 is installed in the heating cylinder 51.
A screw 52 is rotatably and rotatably arranged in the interior of the
The rear end (the right end in the figure) of 2 is supported by the support member 55.

The supporting member 55 has a first servo motor 56.
And the rotation generated by driving the first servomotor 56 is attached to the timing belt 72.
It is adapted to be transmitted to the screw 52 via the.

A ball screw shaft 58 is rotatably supported by the injection device frame 70 in parallel with the screw 52, and the ball screw shaft 58 and the second servomotor 61 are interposed via a timing belt 62. Be connected.
The front end of the ball screw shaft 58 has a support member 55.
It is screwed with a ball screw nut 59 fixed to the.
Therefore, when the second servo motor 61 is driven,
The rotational movement of the second servo motor 61 is caused by the ball screw shaft 5
8 and the ball screw nut 59, that is, the ball screw mechanism 73 converts the linear motion to the linear motion, and the linear motion is transmitted to the support member 55.

Next, the operation of the injection device 50 having the above construction will be described.

First, in the measuring step, the first servomotor 56 is driven to rotate the screw 52 via the timing belt 72, and the screw 52 is retracted (moved to the right in the figure) to a predetermined position. At this time, the resin supplied from the hopper 53 is heated and melted in the heating cylinder 51, and is accumulated in the front of the screw 52 as the screw 52 moves backward.

Next, in the injection step, the injection nozzle 54 is pressed against the fixed mold 36, and the second servomotor 6
1 is driven to rotate the ball screw shaft 58 via the timing belt 62. At this time, the support member 55 is moved along with the rotation of the ball screw shaft 58, and the screw 52 is moved forward (moved to the left in the drawing).
The resin accumulated in front of the screw 52 is the injection nozzle 54.
And is filled in the cavity space 38 formed between the fixed mold 36 and the movable mold 35.

Next, the mold clamping device 30 will be described.

The mold clamping device 30 faces the fixed platen 11 serving as a fixed mold supporting member, the toggle support 46, the tie bar 33 installed between the fixed platen 11 and the toggle support 46, and the fixed platen 11. And a toggle mechanism 40 disposed between the movable platen 31 and the toggle support 46. Here, the fixed platen 11 has a mounting portion 15 at the lower end, and the mounting portion 15 is attached by a mounting bolt 21.
It is attached to the upper surface of the molding machine frame 34. And
The fixed mold 36 and the movable mold 35 are attached to the fixed platen 11 and the movable platen 31 so as to face each other.

The toggle mechanism 40 toggles the cross head 45 with a servo motor (not shown).
6 is moved back and forth between the movable platen 6 and the movable platen 31, the movable platen 31 is moved back and forth along the tie bar 33, and the movable mold 35 is brought into contact with and separated from the fixed mold 36 to close and close the mold. It is designed to open the mold.

Therefore, the toggle mechanism 40 includes a toggle lever 49 swingably supported by the cross head 45, a toggle lever 44 swingably supported by the toggle support 46, and the movable member. Platen 31
Composed of a toggle arm 43 swingably supported with respect to, between the toggle lever 44 and the toggle lever 49,
And, the toggle lever 44 and the toggle arm 43 are linked to each other.

A ball screw shaft 47 is rotatably supported by the toggle support 46, and the ball screw shaft 47 and a ball screw nut 48 fixed to the cross head 45 are screwed together. Then, in order to rotate the ball screw shaft 47, the toggle support 4
The servo motor (not shown) is attached to the side surface of 6.

Therefore, when the servo motor is driven, the rotational motion of the servo motor is converted into a linear motion by the combination of the ball screw shaft 47 and the ball screw nut 48, that is, the ball screw mechanism 75, and the linear motion is crossed. The cross head 45 is transmitted to the head 45 and is moved back and forth in the horizontal direction in the drawing. That is, when the crosshead 45 is moved forward (moved to the right in the figure), the toggle mechanism 40 is extended and the movable platen 31 is moved forward, mold closing and mold clamping are performed, and the crosshead 4 is moved.
When 5 is moved backward (moved to the left in the figure), the toggle mechanism 40 is bent, the movable platen 31 is moved backward, and the mold opening is performed.

An ejector device 76 is provided on the back surface of the movable platen 31, and the ejector device 76 is
An ejector pin (not shown) extending through the movable mold 35 and having a front end (right end in the drawing) facing the cavity space 38, an ejector rod (not shown) disposed behind the ejector pin (left in the drawing), It has a ball screw shaft 42 disposed behind the ejector rod and rotated by a servo motor (not shown), and a ball screw nut 41 screwed with the ball screw shaft 42.

Therefore, when the servomotor is driven, the rotational movement of the servomotor is converted into a linear movement by the combination of the ball screw shaft 42 and the ball screw nut 41, that is, the ball screw mechanism 77, and the linear movement is changed. The ejector rod and the ejector pin are transmitted to the ejector rod and are moved back and forth in the left-right direction in the drawing.

Next, the fixed mold supporting member in this embodiment will be described in detail.

FIG. 1 is a front view of a nozzle side of a stationary platen according to the embodiment of the present invention, FIG. 7 is a side view of the stationary platen in a temperature controlled state according to the embodiment of the present invention, and FIG. FIG. 9 is a side view of the stationary platen in a cold state according to the embodiment of the present invention, and FIG. 9 is a side view of the stationary platen in a state in which the temperature is too high according to the embodiment of the present invention.

Fixed platen 1 as fixed mold supporting member
1 is a mold mounting surface 12 to which a fixed mold 36 is mounted,
Also, the nozzle side surface 13 facing the nozzle 54 side of the injection device 50 is provided, and has a substantially rectangular thick plate shape. A nozzle passage hole 17 through which the tip of the heating cylinder 51 and the nozzle 54 pass is formed near the center of the fixed platen 11. The nozzle passage hole 17 communicates the nozzle side surface 13 and the die mounting surface 12, and is formed in a tapered shape in which the nozzle side surface 13 side has a large diameter and the die mounting surface 12 side has a small diameter. Further, the fixed platen 11 is formed with a plurality of, for example, four tie bar insertion holes 16 into which the tie bars 33 are inserted.

Inside the stationary platen 11, as shown in FIG. 1, a coolant passage 18 through which the coolant flows.
Is formed. Here, the coolant channel 18 is formed by drilling holes from the side surface of the stationary platen 11,
It is formed by closing the opening on the side surface by the closing member 20. The pattern of the coolant channel 18 can be changed appropriately.

Further, joints 19 are attached to both ends of the refrigerant flow path 18 so that a refrigerant introduction pipe and a refrigerant discharge pipe (not shown) are connected. The refrigerant introduction pipe is connected to a refrigerant supply device (not shown), and the refrigerant is supplied from the refrigerant supply device to the refrigerant flow path 18 via the refrigerant introduction pipe. Here, the refrigerant is, for example, oil or water, but may be any fluid.
Further, the refrigerant supply device includes, for example, a refrigerant supply source such as a pump, a refrigerant flow rate control means such as a valve, a refrigerant temperature control means such as a heater, but when the refrigerant is tap water. , It may be a water tap. Incidentally, the refrigerant discharge pipe, when the refrigerant is something that can be discarded like tap water, is connected to a drain groove, drain tank, etc.,
When the refrigerant is to be recovered, it is connected to a recovery tank or the like.

An inclination detecting device 14 is attached to the side surface of the fixed platen 11 as shown in FIG. The inclination detecting device 14 is, for example, a normal strain gauge, and a thin film having electric resistance is attached to the test object so that the electric resistance of the fixed platen 11 as the test object is deformed. The amount of deformation of the fixed platen 11 is detected by detecting the change in the resistance value. In this case, the inclination of the die mounting surface 12 can be detected by the amount of deformation of the fixed platen 11. The inclination detecting device 14 is connected to a control device (not shown), and the control device detects a change in resistance value.

Further, the control device is provided with a CPU, an MPU or other calculation means, a semiconductor memory, a magnetic disk or other storage means, a keyboard or other input means, a communication interface, etc. The amount of deformation of the fixed platen 11 is calculated based on the change in the resistance value, and the inclination of the die mounting surface 12 is calculated. Then, it issues a command to the refrigerant supply device to control the flow rate, temperature, etc. of the refrigerant. The control device may be a single device or a part of the control device that controls the overall operation of the injection molding machine 10.

Further, the tilt detecting device 14 may be a device other than the strain gauge, for example, a device that optically measures the tilt of the die mounting surface 12. In this case, the inclination detecting device 14 is arranged at a position apart from the fixed platen 11, and can detect the change in the inclination of the die mounting surface 12 to detect the deformation amount.

In the present embodiment, the fixed platen 11 is fixed to the frame 34 while being inclined in advance on the opposite side of the nozzle 54, as shown in FIG. In this case, the central axis 81 of the nozzle 54 is displaced from the central axis 82 of the fixed platen 11 and the fixed mold 36,
Further, the die mounting surface 12 and the nozzle side surface 13 of the fixed platen 11 and the mating surface 37 of the fixed die 36 are inclined leftward in the drawing. Note that, in FIG. 8, for convenience of explanation, the inclination of the die mounting surface 12 and the like is exaggerated.

Then, at the time of mold temperature control, the fixed mold 3
The temperature of 6 rises and rises, and the die mounting surface 12 of the fixed platen 11 also receives the heat of the fixed die 36 and rises in temperature. In this case, since the stationary platen 11 is thick, the temperature of the nozzle side surface 13 does not rise as much as the temperature of the mold mounting surface 12 and remains low.

Therefore, the amount of thermal expansion of the die mounting surface 12 becomes larger than the amount of thermal expansion of the nozzle side surface 13. In addition,
The temperature of the back surface of the fixed mold 36 is substantially equal to the temperature of the mold mounting surface 12, and the coefficient of thermal expansion of the material of the fixed mold 36 is also substantially the same as that of the material of the fixed platen 11. The thermal expansion amount of the back surface of 36 is substantially equal to the thermal expansion amount of the die mounting surface 12 of the fixed platen 11.

Since the lower end of the fixed platen 11 is fixed to the frame 34, the fixed platen 11 is
Tilts to the right in the figure, and approaches a vertical state as shown in FIG. Since the amount of thermal expansion of the fixed platen 11 is proportional to the amount of temperature change, if the temperature of the fixed platen 11 during mold temperature control is appropriate,
The stationary platen 11 is in a vertical state as shown in FIG.

However, if the temperature of the fixed platen 11 during the mold temperature control is too high, the fixed platen 11 tilts toward the nozzle 54, as shown in FIG. In this case, the central axis 81 of the nozzle 54 is displaced from the central axes 82 of the fixed platen 11 and the fixed mold 36, and the mating surface 37 of the fixed mold 36 is inclined. Therefore, the mold closing, the mold clamping, and the mold opening of the mold device cannot be performed smoothly, and the resin filled in the cavity space 38 leaks out or the mold device 39 is damaged. In addition, it becomes impossible to press the nozzle 54 against the sprue bush disposed on the back surface of the fixed mold 36 to bring them into close contact with each other. Note that, in FIG. 9, for convenience of explanation, the inclination of the die mounting surface 12 and the like is exaggerated.

On the other hand, the fixed platen 1 during mold temperature control
If the temperature of 1 is too low, the stationary platen 11 will remain tilted opposite the nozzle 54, as shown in FIG. Also in this case, similarly to the case where the fixed platen 11 is inclined toward the nozzle 54 side, the mold closing, the mold clamping, and the mold opening of the mold device 39 cannot be smoothly performed, and the cavity space 38 is formed.
The resin filled in will leak or the mold device 39 will be damaged. In addition, it becomes impossible to press the nozzle 54 against the sprue bush disposed on the back surface of the fixed mold 36 to bring them into close contact with each other.

Therefore, in the present embodiment, the controller controls the fixed platen 1 detected by the inclination detector 14.
Based on the deformation amount of No. 1, a command is issued to the refrigerant supply device to control the refrigerant flow rate, temperature, etc., and maintain the temperature of the stationary platen 11 during mold temperature control so as to be in an appropriate temperature range. .

When the inclination detecting device 14 is a strain gauge, the distortion of the side surface of the fixed platen 11 where the inclination detecting device 14 is attached, that is, the amount of deformation of the fixed platen 11 is shown in FIGS. The states shown are different. Therefore, the control device determines the inclination direction and the size of the die mounting surface 12 based on the deformation amount of the fixed platen 11 detected by the inclination detection device 14. When it is determined that the mold mounting surface 12 is inclined to the opposite side of the nozzle 54, the coolant flow path 18
The temperature of the stationary platen 11 is raised by raising the temperature or decreasing the amount of the refrigerant flowing therethrough. On the other hand, when it is determined that the mold mounting surface 12 is inclined toward the nozzle 54 side,
The temperature of the stationary platen 11 is lowered by lowering the temperature or increasing the amount of the refrigerant flowing through the refrigerant passage 18.

Therefore, the temperature of the stationary platen 11 during the mold temperature control is maintained in an appropriate temperature range, and the mold mounting surface 12 is in a vertical state as shown in FIG. As a result, the center axis 8 of the nozzle 54 is controlled during mold temperature control.
1 is the central axis line 82 of the fixed platen 11 and the fixed mold 36.
And the mating surface 37 of the fixed mold 36 is kept vertical. As a result, the mold device 39 can be smoothly closed, closed and opened, and the cavity space 38
The resin filled in the mold does not leak and the mold device 39
Will not be damaged. In addition, the nozzle 54 is fixed to the fixed mold 3
It is also possible to press against the sprue bush disposed on the back surface of 6 for close contact.

As described above, in the present embodiment, the inclination of the die mounting surface 12 is detected by the inclination detecting device 14, and the flow rate or temperature of the refrigerant flowing through the refrigerant flow path 18 is controlled to determine the die mounting surface. 12 should be vertical.

Therefore, since the mold mounting surface 12 of the fixed platen 11 does not tilt even during mold temperature control, the mold closing, mold clamping and mold opening of the mold device 39 can be performed smoothly, and the cavity The resin filled in the space 38 does not leak, and the mold device 39 is not damaged. Further, the nozzle 54 can be pressed against a sprue bush arranged on the back surface of the fixed mold 36 to be brought into close contact therewith.

As described above, in the present embodiment,
The example in which the fixed mold supporting device is applied to the injection molding machine has been described. However, the fixed mold supporting device is applicable not only to the injection molding machine but also to a die molding machine, a transfer molding device for encapsulating a semiconductor such as an IC. Can also be applied. Further, the movable platen may be fixed without being tilted.

Furthermore, the present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention.

[0065]

As described above in detail, according to the present invention, in the fixed mold supporting device of the molding machine, the mold mounting surface to which the fixed mold is mounted and the refrigerant flow path through which the refrigerant flows are provided. A fixed mold supporting member provided, an inclination detecting device for detecting the inclination of the mold mounting surface, and controlling the refrigerant based on the inclination of the mold mounting surface to make the mold mounting surface vertical. And a control device.

In this case, since the mold mounting surface of the fixed mold supporting member does not tilt even during mold temperature control, the mold closing, mold clamping and mold opening of the mold device can be smoothly performed. The resin filling the cavity space does not leak,
The mold device is not damaged. Further, the nozzle can be pressed against a sprue bush arranged on the back surface of the fixed mold to be brought into close contact therewith.

[Brief description of drawings]

FIG. 1 is a front view of a stationary platen on a nozzle side according to an embodiment of the present invention.

FIG. 2 is a side view of a conventional stationary platen when the mold is cold.

FIG. 3 is a side view when the lower end of the stationary platen is not fixed during the conventional mold temperature control.

FIG. 4 is a side view showing a case where a lower end portion of a stationary platen is fixed during conventional mold temperature control.

FIG. 5 is a side view of a case where a stationary platen is tilted in advance when a conventional die is cold.

FIG. 6 is a side view schematically showing an injection molding machine according to the embodiment of the present invention.

FIG. 7 is a side view of the stationary platen in the temperature-controlled state according to the embodiment of the present invention.

FIG. 8 is a side view of the stationary platen in the cold state according to the embodiment of the present invention.

FIG. 9 is a side view of the stationary platen when the temperature is too high according to the embodiment of the present invention.

[Explanation of symbols]

10 injection molding machine 11 Fixed platen 12 Mold mounting surface 14 Tilt detection device 18 Refrigerant flow path 36 Fixed mold

Claims (4)

[Claims] 1. A fixed mold support member comprising: (a) a mold mounting surface to which a fixed mold is mounted; and a coolant flow path through which a coolant flows, and (b) an inclination for detecting a slope of the mold mounting surface. Based on the detection device and (c) the inclination of the mold mounting surface,
A controller for controlling the refrigerant to make the mold mounting surface vertical, a fixed mold supporting device of a molding machine. 2. The fixed mold supporting device for a molding machine according to claim 1, wherein the inclination detecting device detects deformation of the fixed mold supporting member. 3. The strain detecting device is a strain gauge attached to a side surface of the fixed mold supporting member.
The fixed mold supporting device of the molding machine according to 1. 4. The fixed mold supporting device for a molding machine according to claim 1, wherein the refrigerant is controlled in flow rate or temperature and is supplied from the refrigerant supply device to the refrigerant flow path. .