JPH11348050A - Mold apparatus and method for molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a molding surface of a mold by controlling to heat a compressed gas of a chamber to a temperature invariable in a heating temperature range of the mold, and controlling to open or close a valve for spraying the gas from the chamber to a molding. SOLUTION: A mold 2 constitutes a split mold 3 which can be opened in its molding cavity 5 partly formed at a core mold 8. A compressed gas is sprayed from a chamber 30 to a molding S molded in the cavity 5 of the mold 2 to release the molding S. In this case, an openable/closable valve 42 provided in a passage 11 for spraying the gas from the chamber 30 to the molding S is provided. At the time of spraying the gas to the molding S, a temperature controller 20 controls to heat the gas of the chamber 30 to a temperature invariable in a heating temperature range of the mold 2 to control opening and closing of the valve 52 for spraying the gas from the chamber 30 to the molding S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for molding rubber and a molding method therefor. In particular, the present invention relates to a molding die apparatus having a temperature control device that prevents the mold from cooling when releasing the molded article, and a molding method therefor.

[0002]

2. Description of the Related Art As prior art relating to the present invention, there is an injection molding apparatus shown in FIGS.

FIGS. 11 and 12 are conceptual diagrams in which a rubber dust cover is formed by an injection device 80 and a molding die 60. FIG. FIG. 11 shows a sprue bush 61 of a molding die 60.
FIG. 7 is a cross-sectional view of a state in which a nozzle 81 of an injection device 80 is touched and a rubber molding material A is injected. FIG. 12 shows FIG.
It is sectional drawing of the state which opened the mold from the state of FIG.

In FIG. 11, a molding material A is melted from an injection device 80, and a rubber molding material A is injected into a molding cavity 62 of a molding die 60 by an injection screw 82. Then, the molded product S is molded in the molding cavity 62.

FIG. 12 shows a state in which the injection device 80 is retracted after the molding in the state of FIG. 11, and then the upper die 63 is opened.

In FIG. 12, a dust cover which is a molded product S is formed so as to cover the core 64. In order to release the dust cover from the core 64, the dust cover must be expanded from the outer shape of the core 64 and released. For this reason, when the compressed gas is blown from the nozzle 83 to the inner peripheral surface Sa of the dust cover to expand it, and is released from the core 64, the dust cover can be released efficiently. In particular, in multi-cavity molding, it is efficient to release the molded product S by blowing the compressed gas.

[0007]

However, the method of blowing the compressed gas into the core 64 and releasing the mold is to release the compressed gas from a high pressure state (5 to 7 kgf / cm ² ) to the atmospheric pressure at one time. Therefore, the temperature drop of the adiabatic expansion due to the pressure drop is accompanied. In particular, the compressed gas flow in the mold has a narrow passage, so
A further cooling effect will occur.

[0008] Since the molding surface is cooled by the compressed gas blow through the molding die, a defect occurs in the molded product. In particular, the rubber molding material undergoes an unstable state of vulcanization due to the cooling of the mold, and the molding cycle becomes longer, or in an automatic cycle, it stops during the cycle.

Particularly, a molded product such as a boot or a dust cover is molded by a molding die having a core 64. Therefore, when the core 64 is small, a heater or a heating fluid passage cannot be provided, so that the core 64 is particularly cooled. When the core 64 is cooled, heat must be introduced from around the core 64 by heat conduction. As a result, the molding temperature becomes unstable, resulting in molding failure.

When the molding material A is at a relatively low temperature (70 ° C. to 90 ° C.) such as a dust cover or a boot, sufficient heat cannot be supplied to the molding surface 65 of the molding die 60. Vulcanization of the filled molding material A is not promoted, and the vulcanization time must be extended. For this reason, the molding cycle is lengthened and productivity is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a technical problem of the present invention is to release a molded product without cooling a molding surface of a molding die. An object of the present invention is to prevent molding defects of a molded product to be molded.

Another object of the present invention is to prevent the cooling of the mold at the time of releasing the molded product in the molding, thereby facilitating the heat management at the time of molding the molding die and reducing the running cost.

It is another object of the present invention to prevent a decrease in temperature at the time of release of a molded product, shorten a molding cycle, automate molding, enable multi-cavity molding, and improve molding ability.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above technical problems, and the technical means is constituted as follows. That is,

According to the first aspect of the present invention, there is provided a split mold (3) in which a mold cavity (5) is formed between a core mold (8) and the mold can be opened. ), And a chamber (30) with a heat exchanger that stores a compressed gas that is blown onto the molded product (S) formed in the molding cavity (5) of the molding die (2) and released from the mold. An opening / closing valve (52) having a passage (11) for blowing a compressed gas from the chamber (30) to the molded article (S) and a molding die ( 2) Temperature for controlling the heating of the compressed gas in the chamber (30) to a temperature at which the heating temperature range does not change and for controlling the opening and closing of the valve (52) for blowing the compressed gas from the chamber (30) to the molded article (S). Equipped with a control device (20) A.

According to a second aspect of the present invention, there is provided a molding die apparatus comprising: a core die (8); and a split die (2) which is formed by forming a molding cavity (5) in a space surrounding the core die (8). Mold (2), a passage (11) for supplying compressed gas to the molding surface of the core mold (8) of the mold (2), and a chamber with a heat exchanger communicating with the passage (11) and storing the compressed gas. (30), an openable / closable valve (52) provided in the passage (11) for allowing the compressed gas in the chamber (30) to flow out to the core mold (8), and a temperature sensor for detecting the molding temperature of the mold (2) 15), a second temperature sensor (16) for detecting the temperature of the compressed gas in the chamber (30), a pressure sensor (17) for detecting the pressure of the compressed gas in the chamber (30), and a molding temperature of the mold (2). The value is inputted from the temperature sensor (15) and the temperature of the chamber (30) is inputted. When the pressure is input from the second temperature sensor (16) and the pressure value is input from the pressure sensor (17) and the compressed gas is blown onto the mold (2), the chamber (30) is kept at a temperature at which the molding temperature can be preserved. And a temperature control device (20) for controlling the temperature of the compressed gas to open the valve when the molded product (S) is released from the mold.

According to a third aspect of the present invention, there is provided a molding method of a molding apparatus, wherein a molded product (S) is formed in a molding cavity (5) between a core mold (8) and a split mold (3) which can be opened. The mold is opened, the split mold (3) is opened, the molded product (S) is left in the core mold (8), the molding temperature value of the molding mold (2) is input to the temperature control device (20), and the heat exchanger is formed. The temperature value and the pressure value of the compressed gas stored in the attachment chamber (30) are inputted, and the compressed gas is blown and the temperature value lowered by the adiabatic expansion becomes the compressed gas temperature value which becomes substantially equal to the mold temperature value. The compressed gas temperature in the chamber (30) is controlled, the valve (52) is opened, and the compressed gas in the chamber (30) is pressure-fed to the inner peripheral surface of the molded product (S) of the core mold (8) to release the mold. Is what you do.

[0018]

According to the mold apparatus of the present invention, when releasing a molded product formed by the molding die, the outer peripheral surface of the molded product is released by opening the split mold even if an undercut exists. Can be. Further, the core mold and the molded article can be released from the core mold by blowing a compressed gas onto the inner peripheral surface of the molded article to expand the molded article. At this time, even if the temperature is lowered by adiabatic expansion because the compressed gas is released, even if the temperature of the compressed gas in the chamber is adiabatically expanded beforehand by the temperature control device, the temperature is substantially the same as the mold temperature. Since the heating is controlled so as to reach the temperature, the molding temperature of the molding die can be prevented from lowering even if the compressed gas is blown to the molding die. For this reason, various defects due to the molding temperature can be prevented.

In particular, the temperature control device inputs the molding temperature value of the molding die from the temperature sensor, and also receives the temperature value and the pressure value of the compressed gas in the chamber. Even if the temperature of the heated compressed gas drops due to adiabatic expansion, the temperature of the compressed gas in the chamber is controlled by calculating the temperature program so as to reach the mold temperature, so the compressed gas from the chamber is sprayed. Even when the molded product is released from the mold, the temperature of the mold is not lowered. Moreover, when the temperature sensor, the second temperature sensor, and the pressure sensor are used to input each value to the temperature control device and take a method of controlling the temperature of the compressed gas in the chamber, the pressure of the compressed gas is automatically released from the temperature of the compressed gas. And can be set.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a molding apparatus and a molding method according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing the concept of a molding apparatus 1 according to the present invention. FIG. 2 is a sectional view of the mold opened from the molding state of FIG. Further, FIG. 3 is a cross-sectional view of the state where the injection device 40 has been moved from the state of FIG.

In FIG. 1, reference numeral 1 denotes an injection molding device.
The injection device 40 of the injection molding device 1 melts and fluidizes the molding material A between the injection screw 41 and the screw cylinder 42 and injects the molding material A into the mold 2 by the advancement of the injection screw 41.

The molding material A is an elastomer, and particularly elastically deforms like a rubber material. The molding material A used in FIG. 1 is a chloroprene rubber (CR), a polyurethane rubber (AU), a chlorinated polyethylene, an elastic plastic, etc., for molding a dust cover. The molded product S is a molded product having an undercut that is difficult to release.

In the molding die 2, a core die 8 for molding the inner peripheral surface Sa of the dust cover forms a part of the molding cavity 5. A sprue hole 6 for introducing the molding material A from the nozzle 43 of the injection device 40 communicates with the molding cavity 5. The molding die 2 is configured to open from the parting surface 7 of the molding cavity 5. The upper split mold 3 to be opened opens and separates from the molded product S on both sides before the mold is opened, thereby enabling upward release.

A core mold 8 is mounted on the lower split mold 4 composed of the upper and lower split molds 3 and 4, and a release passage having a gap so that compressed gas can flow between the mounting faces 9. 1
0a is formed. Further, a release passage 10 is formed in which the compressed gas flows into the core mold 8 and reaches the inner peripheral surface Sa of the molded product S. This release passage 10 and the release passage 10 having a gap
The supply passage 12 that supplies the compressed gas in communication with the lower portion a of the lower mounting plate 13 passes through the release passage 10. A pipe screw (not shown) is provided below the supply passage 12 so that compressed gas can be supplied from a pipe attached to the pipe screw. The above pipeline is the passage 11 of the pneumatic unit. The mold 2 is sandwiched between the mounting plates 13 from above and below.

The compressed gas supplied to the passage 11 is controlled and supplied by a temperature control device 20.

The compressed gas is supplied to the passage 11 of the pneumatic unit from a compressor (not shown) communicating with the compressed gas (air) supply device 50. The compressed gas is supplied from a compressor to a compressed gas supply device 50. The compressed gas from the compressor is opened and closed by opening and closing a first valve 51 to form a chamber 30 with a heat pipe type heat exchanger.
Supplied to The heat pipe type heat exchanger 31 is provided in the heat pipe type heat exchanger equipped chamber 30. As the heat exchanger 31, other devices that heat various compressed gases can be used.

Further, the heat pipe type heat exchanger 31 uses a heat pipe as a heat receiving element, and the arrangement of the heat receiving elements is formed in a staggered or grid pattern in a tube bank structure. The middle is partitioned by a tube sheet, and a high-temperature fluid is caused to flow on one side, while a low-temperature fluid is caused to flow generally in a counter-current manner on the other side so that heat is exchanged between the two fluids. This heat pipe type heat exchanger 31
Is heated to the optimum temperature under the control of the compressed gas temperature control device 20 and stored in the chamber 30 with the heat pipe type heat exchanger.

This heat pipe type chamber 3 with heat exchanger
The compressed gas heated to the optimum temperature by the pressure 0 is supplied to the supply passage 12 on the molding die 2 side through the passage 11 by opening the second valve 52, and the compressed gas is further supplied to the release passage 10.
Then, the molded product S is blown from the mold release passage 10a to the inner peripheral surface Sa of the molded product S to expand and release the molded product S from the core mold 8.

The release of the molded product S from the core mold 8 is performed immediately after the molding is completed and the mold is opened. This work process is operated by an operation control device used together with the temperature control device 20. Details of this operation control device will be omitted, but only relevant control will be described.

This operation control device (not shown) controls the injection device 40 to rotate the injection screw 41 to move the molding material A in a molten state and to move the molding material A forward. The molding cavity 5 is injection-filled and molded.

The mold 2 is heated by a heater.
The rubber molding material A filled in the molding cavity 5 is
Vulcanization molding is performed at a temperature of 150 to 200 ° C.

When vulcanization molding is completed in the molding cavity 5, the injection device 40 retreats upward under the control of the operation control device, and the upper split mold 3 moves by being split into two sides and separated from the molded product. I do. FIG. 2 is a cross-sectional view showing the mold opening state.

In FIG. 2, the upper split mold 3 is dividedly moved to both sides of the molded product S and is opened. The molded product S is adhered to the core mold 8 only in a molded state. However, it is difficult to release the molded product S because it adheres to the core die 8 in an undercut state. Therefore, the compressed gas heated as described above flows from the passage 11 into the release passage 10 and the release passage 10a from the passage 11 by opening the second valve 52, reaches the inner peripheral surface Sa of the molded product S, and reaches the core mold 8 And inner peripheral surface S
a, and at the same time, the molded article S is expanded and released.

FIG. 3 is a cross-sectional view of the molding die in a state where the molded product S is released from the core die 8. In FIG. 3, the temperature of the core mold 8 is set to a set temperature of 150 ° C. to 200 ° C. so that the vulcanization of the rubber molding material A is accelerated. When a compressed gas is blown to release the molded article S from the molded article S, the temperature of the core mold 8 decreases due to adiabatic expansion of the compressed gas. Then, in the next molding cycle, molding such as defective products and the fact that the vulcanization of the molding is not accelerated cause problems such as a prolonged molding cycle. Exchanger 31
Is controlled, the core mold 8 is maintained in the set temperature range by the compressed gas.

The set temperature of the core mold 8 (150 ° C. to 20
(0 ° C.), the temperature of the compressed gas blown to the core mold 8 is heated to about 400 ° C. The set temperature of the compressed gas is generally known based on the set temperature of the core mold 8.

[0037]

T = T ₁ [P / P ₁ ] ^{K−1 / K,} where T = temperature T ₁ = change temperature P = pressure P ₁ = change pressure K = Poisson index

From the above, a set value is obtained by adding conditions. These set values are calculated by the temperature control device 20.

The temperature control device 20 has a pressure of 5 to 7 kgf /
A compressed gas supply device (a tank for compressed gas supplied from a compressor) 50 for supplying compressed gas having a pressure of ² cm ^2.
The first valve 51, which is an opening / closing valve, is opened and supplied to the chamber 30 with the heat pipe type heat exchanger. The compressed gas supplied to the heat pipe type heat exchanger equipped chamber 30 is:
The temperature of the molding die 2, for example, the temperature of the core die 8 is detected by the first temperature sensor 15 and input to the temperature control device 20 as an actually measured value. For example, in the case of a rubber molding material, 180 ° C.
A measured value of ~ 200 ° C is input.

Next, the temperature control device 20 is connected to the heat pipe type heat exchanger 3 of the chamber 30 with the heat pipe type heat exchanger.
1 to control the temperature. Then, the temperature of the compressed gas in the chamber 30 with the heat pipe type heat exchanger is detected by the second temperature sensor 16, and the measured temperature value T ₁ is input to the temperature control device 20. Further, the pressure of the compressed gas in the heat pipe type heat exchanger equipped chamber 30 is detected by the pressure sensor 17, and the measured pressure value P is input to the temperature control device 20.

Based on the actually measured values of the sensors 15, 16 and 17, for example, the values are substituted into the above-mentioned equation (1) to calculate the values, and this value is sent from the temperature controller 20 to the chamber with a heat pipe type heat exchanger. A signal is input to 30 to control the compressed gas to a set temperature, for example, 400 ° C. The set temperature T controls the temperature at the time when the temperature is lowered due to adiabatic expansion so as to be the temperature of the core mold 8.

As described above, when the second valve 52 is opened to release the molded product S from the core mold 8 and the molded product S is released, the second valve 52 is opened. At the same time, the first valve 51 opens and closes when the compressed gas is supplied from the compressed gas supply device 50 to the chamber 30 with the heat pipe type heat exchanger. The above steps are repeated for each molding, and the mold S is released from the core die 8.

FIG. 4 is a configuration diagram of a main operation part of the temperature control device 20. 4, a temperature control device 20 includes an arithmetic processing unit (CPU) 242, a memory unit 242, and an A / DC 2
44, an I / O device 246 and a D / AC 248. Then, the I / F 2 via the first temperature sensor 16
The analog temperature signal input from 2 is A / DC
The signal is converted by 244 into a digital temperature signal.
Similarly, an analog pressure signal input from the I / F 23 via the pressure sensor 17 is converted by the A / DC 244 into a digital pressure signal. Further, the analog temperature signal input from the I / F 23b via the first temperature sensor 15 is converted into a digital temperature signal by the A / DC 244.

Then, the CPU activates a control program for calculating the numerical value 1 and other set values stored in the memory unit 242, and outputs the above-described control operation to the chamber 30 with the heat pipe type heat exchanger, valves and the like. Control operation. As a result, when the molded article S is released from the core mold 8, the digital signal is output to the second valve 52 via the D / AC 243 as a drive signal to the I / F 21. It should be noted that the setting unit 25 inputs the equation 1 and the set value to the memory unit 242 via the I / O device 246.

FIG. 5 is a sectional view of a molding apparatus 1 according to another embodiment of the present invention. In FIG. 5, an injection device 40 is provided above, and when the injection material A is injected into the molding cavity 5 of the molding die 2, the injection device 40 moves downward to cause the nozzle portion 43 to move downward. Injection molding is performed by touching the sprue bush 14 with a nozzle. In injection of the molding material A, the injection screw 41 rotates to bring the molding material A into a molten state, and at the same time, moves forward in the screw cylinder 42 to extrude and fill the molding cavity 5.

On the other hand, the molding apparatus 1 corresponding to the lower part of the injection apparatus 40 includes the molding die 2 and the temperature controller 20.

The molding die 2 includes a holding portion 13 of the upper mounting plate 13a.
An upper split mold 3 fixed by a ₁ is provided. The upper split mold 2 is configured such that the upper mounting plate 13a is opened upward to split the upper split mold 3 in both directions.

FIG. 6 is a sectional view of the molding die 2 in a state where the upper split die 3 is opened in both directions. In FIG. 6, a molded product S adheres to the core mold 8 in a molded state. The core die 8 has a bellows-like inner molding surface 8a having a mountain-shaped cross section for molding the bellows S. For this reason, since the bellows portion of the molded article S and the bellows-like inner molding surface 8a of the core mold 8 are engaged, it is difficult to release the mold.

FIG. 7 is a sectional view showing a state in which the core mold 8 has risen from the mold open state of FIG. In FIG. 7, the upper split mold 3 of FIG. 6 can be opened to both sides to release the bellow-shaped outer molding surface 3a of the upper split mold 3 and the molded product S. It is difficult to release the inner molding surface 8a from the molded product S.

For this reason, the ejector protrudes and the cylinder 2
The rod 8a of the core die 8 is pushed upward by the rod 26a of the sixth die and moved upward from the upper split die 3. And
The compressed gas is blown from the supply passage 12 to the inner peripheral surface Sa of the molded product S through the release passage 10 of the rod 8b so that the molded product S does not contact the upper split mold 3.

The temperature of the compressed gas and its control are as follows:
This is the same as the temperature control device 20 of the embodiment. The temperature control device 20 shown in FIG. 8 is as described in the text in FIGS. 1 and 4, and the molding device 1 shown in FIG. The control operation is performed as described above, and the description is omitted. It should be noted that the reference numerals a and b in FIG. 5 are connected to the reference numerals a and b in FIG.

FIG. 9 is a control flowchart for each operation unit of the temperature control device 20 with reference to FIG. 5 and FIG. The molding method of the present invention will be described based on the flowchart of FIG.

[First Step] In FIG. 9, the first valve 51 is opened by the output from the temperature control device 20, and the pressure from the compressed gas supply device 50 to the heat pipe type heat exchanger equipped chamber 30 is changed to 5. A compressed gas (air) having a pressure of about 7 kgf / cm ² is introduced.

[Second Step] Next, whether or not the pressure of the compressed gas in the chamber 30 with the heat pipe type heat exchanger has reached the pressure in the compressed gas supply device 50 is detected and confirmed by the pressure sensor 17. . Then, when the compressed gas in the heat pipe type heat exchanger equipped chamber 30 becomes equal to the internal pressure of the compressed gas supply device 50, the first valve 51 is closed.

[Third Step] After the first valve 51 is closed, the temperature of the molding die 2, particularly the temperature of the core die 8, is detected by the first temperature sensor 15 and input to the temperature control device 20. At the same time, the temperature of the compressed gas in the heat pipe type heat exchanger equipped chamber 30 is detected by the second temperature sensor 16 and input to the temperature control device 20.

[Fourth Step] Then, the temperature of the molding die 2 is confirmed by the first temperature sensor 15 and the temperature and the pressure are substituted into the control program, for example, the equation (1) input to the memory unit 242. To calculate the temperature after the cross-section expansion, and correct it taking into account the conditions.
To the set temperature. This is the set temperature for calculating the target compressed gas temperature.

[Fifth Step] The temperature of the compressed gas in the heat pipe type heat exchanger 30 is controlled to the set temperature based on the set temperature obtained by the calculation of the target compressed gas temperature.

[Sixth Step] During this time, the molding material injected into the molding cavity 5 is completed, and the mold 2 is opened. Then, the molded product S is formed in a state of being adhered to the core mold 8 in a molded state, and the second valve 52 is opened so that the molded product S is supplied from the supply passage 12 of the molding die 2 through the release passage 10. A compressed gas is introduced into the inner peripheral surface Sa. Further, the molded article S is peeled from the core mold 8, and the molded article S is expanded and released from the core mold 8.

At the same time when the molded product S is released from the core mold 8, the second valve 52 is closed. At the same time, the first valve 51 is opened and 5 to 7 k
The same molding cycle as the previous step of supplying the compressed gas of gf / cm ^{2 to} the chamber 30 with the heat pipe type heat exchanger is repeated.

In the above embodiment, the injection molding machine has been described, but the present invention can be applied to a compression molding machine and the like. Also, when a compressed gas is blown from the nozzle 28 to the molded product S shown in FIG. 10 and the molded product S is released from the core mold 8, the temperature of the core mold 8 decreases due to the adiabatic expansion of the compressed gas. By heating the compressed gas to the set temperature in advance, a decrease in the temperature of the core mold 8 can be prevented.
FIG. 10 is a view showing a state in which the injection device 40 and the upper split mold 3 are moved upward to open the mold. And the molded product S is
It adheres to the core mold 8 in a molded state. In this state, the molded product S is separated from the core mold 8 by spraying the compressed gas from the chamber 30 with the heat pipe type heat exchanger communicating with the nozzle 28 below the molded product S (toward the tip of the nozzle). Becomes possible. Also in this case, the temperature of the core mold 8 is maintained at the temperature of the molding conditions without lowering the temperature of the core mold 8 because the temperature of the lower temperature due to adiabatic expansion is added in advance by the chamber 30 with the heat pipe type heat exchanger. Becomes possible.

The chamber 3 with a heat pipe type heat exchanger
Although 0 has been described as the heat pipe type heat exchanger 31, it is possible to control the compressed gas to the set temperature by another heating device.

[0062]

According to the molding apparatus of the present invention, the temperature control device calculates the temperature of the compressed gas to be equal to the temperature of the molding die even if the compressed gas in the chamber is released to the molded article and adiabatically expanded. Since it is controlled, it is not necessary to perform the next molding in a state where the molding die is lower than the molding temperature, so that molding defects can be prevented.

In particular, when the molding material is formed at a low temperature, the fixed price of the molding temperature is directly linked to the failure of the molded product. Therefore, the temperature control of the compressed gas can effectively prevent the failure of the molded product. it can.

The temperature value of the molding die and the temperature value and the pressure value of the compressed gas in the chamber are inputted to the temperature control device, and the temperature and pressure are calculated by the temperature and pressure calculation program. Is controlled so as to match the temperature of the molding die, so that the setup can be simplified by automatically controlling the temperature. Further, this control can accurately control the temperature of the compressed gas in the chamber.

[Brief description of the drawings]

FIG. 1 is a sectional view of a molding apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the upper split mold of FIG. 1 is opened from a molded product.

FIG. 3 is a cross-sectional view in which a compressed gas is blown onto the molded article from the state of FIG. 2 to release the molded article.

FIG. 4 is a configuration diagram centering on a CPU of the temperature control device of FIG. 1;

FIG. 5 is a sectional view of a molding apparatus according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a mold device for opening a split mold from the state of FIG. 5;

7 is a cross-sectional view of the molding apparatus in a state where the core mold is lifted from the state of FIG. 6 and released.

FIG. 8 is a configuration diagram illustrating a temperature control device of the molding die device of FIG. 5;

FIG. 9 is a control flowchart of the temperature control device of FIG. 8;

FIG. 10 is a sectional view of a molding apparatus according to still another embodiment of the present invention.

FIG. 11 is a sectional view of a conventional molding apparatus.

FIG. 12 is a sectional view of the mold apparatus of FIG. 11 with the mold opened.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mold apparatus 2 ... Mold 3 ... Upper division mold 3a ... Outer molding surface 4 ... Lower division mold 5 ... Mold cavity 6 ... Sprue hole 7 ... Parting surface 8 Core die 8a Molding surface 9 Mounting surface 10 Release passage 10a Release passage 11 Passage 12 Supply passage 13 Mounting plate 13a Upper mounting plate 13b Lower mounting plate 14 Sprue bush 15 First temperature sensor 16 Second temperature sensor 17 First pressure sensor 20 ..Temperature control devices 21-23 ... I / F (interface) 24 ... Temperature control device 240 ... CPU 242 ... Memory unit 243 ... D / AC 244 ... A / DC 246 ... I / O device 25 ... Setting device 26 ... Ejector projecting syringe Da 30: chamber with heat pipe type heat exchanger 31: heat pipe type heat exchanger 40: injection device 41: injection screw 42: screw cylinder 43: nozzle part 50 ...・ Compressed air supply device (compressor) 51 ・ ・ ・ First valve 52 ・ ・ ・ Second valve 60 ・ ・ ・ Molding mold 61 ・ ・ ・ Sprue bush 62 ・ ・ ・ Molding cavity 63 ・ ・ ・ Upper mold 64 ・ ・ ・ Core 65 molding surface 80 injection device 81 nozzle 82 injection screw 83 nozzle A molding material P measured pressure value S molded product Sa ..Inner peripheral surface T ・ ・ ・ Set temperature T ₁・ ・ ・ Measured temperature value

Claims (3)

[Claims] 1. A mold (2) having a core mold (8) and a split mold (3) formed with a mold cavity (5) between the core mold (8) and capable of opening the mold. The molding die (2)
Molded product (S) molded in the molding cavity (5)
A chamber (30) with a heat exchanger storing a compressed gas to be released and released from the chamber, and an openable and closable valve (11) in a passage (11) for blowing the compressed gas from the chamber (30) to the molded article (S). 52) and the chamber (3)
0) The heating of the temperature of the compressed gas in the chamber (30) is controlled so that the heating temperature range of the mold (2) does not change even when the compressed gas of (0) is sprayed on the molded article (S), and the temperature of the chamber (30) is controlled. ), A temperature control device (20) for controlling the opening and closing of the valve (52) for blowing the compressed gas to the molded product (S). 2. A molding die (2) having a core die (8) and a split die (2) which can be divided by forming a molding cavity (5) in a space surrounding the core die (8). The passage (1) for supplying compressed gas to the molding surface of the core mold (8) of (2)
1) a chamber (30) with a heat exchanger for storing the compressed gas in communication with the passage (11), and the compressed gas in the chamber (30) provided in the passage (11) is transferred to the core mold (8). ), An openable and closable valve (52), a temperature sensor (15) for detecting a molding temperature of the mold (2),
A second detecting a temperature of the compressed gas in the chamber (30);
A temperature sensor (16), a pressure sensor (17) for detecting the pressure of the compressed gas in the chamber (30), and a molding temperature value of the molding die (2) from the temperature sensor (15) and the chamber (30). 30) inputting the temperature value from the second temperature sensor (16) and inputting the pressure value from the pressure sensor (17), and blowing the compressed gas onto the molding die (2); A temperature control device (20) for controlling the temperature of the compressed gas in the chamber (30) to a temperature at which the value can be preserved and opening and controlling the valve when the molded product (S) is released from the mold. Mold equipment. 3. A core mold (8) and an openable split mold (3).
The molded product (S) is molded in the molding cavity (5) between the molds, and the split mold (3) is opened to leave the molded product (S) in the core mold (8). ), The temperature and pressure of the compressed gas stored in the chamber (30) with a heat exchanger are input, and the compressed gas is blown to insulate. The compressed gas temperature of the chamber (30) is controlled to a compressed gas temperature value at which the temperature value reduced by expansion is substantially equal to the mold temperature value, and the valve (52) is opened to open the chamber (30). A molding method for a molding apparatus, wherein a compressed gas is pressure-fed to an inner peripheral surface of the molded product (S) of the core mold (8) to release the mold.