JP2004058647A - Thermosetting resin and runnerless molding method for rubber, etc - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermosetting resin, a runnerless molding device for a rubber, etc., and its manufacturing method which prevents thermal conduction of a high molding temperature of a cavity at the time of molding operation to a runner part by keeping the gate isolated and opened for a longer time, eliminates a material loss to a sprue runner by forming a homogeneous temperature distribution in the runner, and takes effects to improve moldability and alleviate a load to the global environment by attempting to reduce the industrial wastes. <P>SOLUTION: The device features that, at the time of conducting a heat treatment by installing a movable runner bush 15 which distributes fluidized materials which are maintained at a low temperature in an uncured and unvulcanized condition and supplied from an injection nozzle 31 in a temperature control bush 13 connecting with a gate 4 of a cavity 1 while allowing a free sliding, a heat insulation space A is formed by keeping a distance between the movable runner bush 15 and the gate 4, a valve pin 18 is inserted into the movable runner bush 15 while allowing a free moving, and the gate 4 can be opened and closed by operating the valve pin 18 in connection with the extraction operation of fluidized materials. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a runnerless molding apparatus and method for thermosetting resin and rubber.
[0002]
[Prior art]
This type of runnerless molding apparatus and method for thermosetting resin or rubber requires a sprue runner part to be constantly maintained in an uncured / unvulcanized low temperature state during the molding operation, and is widely used. It is known (see, for example, Patent Document 1, Patent Document 2, Patent Document 3).
[0003]
[Patent Document 1]
JP-A-63-141714 [Patent Document 2]
JP-A-11-129289 [Patent Document 3]
JP 2000-280293 A
[Problems to be solved by the invention]
However, these conventional examples have a problem that the structure for minimizing the heat conduction to the runner portion having the flowable material at the molding temperature in the cavity is as complicated as possible, and a sufficient effect cannot be expected. .
[0005]
The present invention has been made by paying attention to the points described above, and mainly by forming a heat insulating space portion as a movable structure for moving a runner portion having a flowable material forward and backward with respect to a cavity in a molding operation, The high molding temperature of the cavity at the time of molding is prevented from conducting to the runner part in the separated state longer than the gate, thereby eliminating the material loss of the sprue runner, and reducing the secondary processing cost and industrial waste. It is an object of the present invention to provide a method of molding a thermosetting resin, rubber, or the like that can improve moldability and reduce the burden on the global environment.
[0006]
[Means for Solving the Problems]
The present invention can solve the above problem by providing the following configuration.
[0007]
(1) A movable movable runner bush through which a flowable material supplied from an injection nozzle maintained at an uncured and unvulcanized low temperature state can be slidably disposed within a temperature-controlling bush communicating with a gate of a cavity. At the time of heat treatment, the distance between the movable runner bush and the gate is increased to form an adiabatic space, and a valve pin is movably inserted into the movable runner bush. A runnerless molding device for thermosetting resin and rubber, wherein the gate can be opened and closed by the valve pin.
[0008]
(2) The above (1), wherein a slide mechanism for a runner that slides a movable runner bush in a temperature control bush and a slide mechanism for a valve that opens and closes a gate with a valve pin are separately provided. Runnerless molding equipment for thermosetting resin and rubber.
[0009]
(3) One or more movable runner bushes through which the valve pin is inserted are provided, and a temperature-controlling bush that allows the flow of the flowing raw material for discharging from the injection nozzle through the manifold and that can be inserted through the movable runner bush is A thermosetting resin or rubber according to the above (1) or (2), wherein one or more multiple movable gates corresponding to the number of the movable runner bushes are formed so that multiple multiple gates or multiple single gates can be obtained. Runnerless molding equipment.
[0010]
(4) The temperature control bush has a porous structure in which one or more movable runner bushes can be arranged, and the runner-less thermosetting resin and rubber or the like according to any one of the above (1) to (3), Molding equipment.
[0011]
(5) The runner such as a thermosetting resin or rubber according to any one of the above (1) to (4), wherein the movable runner bush is formed by attaching a heat insulating bush to the peripheral surface of the center hole at the tip. Less molding equipment.
[0012]
(6) The thermosetting resin according to any one of (1) to (5), wherein the movable runner bush is provided with an opening in a base portion communicating with the runner portion of the manifold in the runner portion of the movable runner bush. Runnerless molding equipment for resin and rubber.
[0013]
(7) The heat-insulating bush of the movable runner bush is configured such that an air gap can be formed on the outer periphery of the gate between the heat-insulating bush and the conical bottom formed in the cavity plate when the gate is in contact with the gate side. (1) A runnerless molding device for thermosetting resin and rubber according to any one of (3), (4) and (5).
[0014]
(8) When a sleeve for fixing the base of the movable runner bush is provided, the sleeve is provided with a runner section and an opening communicating with the runner section of the manifold. A runnerless molding apparatus for thermosetting resin and rubber as described in the above.
[0015]
(9) A temperature control mechanism is provided on a movable movable runner bush through which a flowing raw material supplied from an injection nozzle maintained at an uncured and unvulcanized low temperature state is provided, and the mold is connected to a cavity gate. The movable runner bush and the gate are spaced apart from each other to form a heat insulating space by disposing the movable runner bush and the gate in the through hole provided so as to be movable back and forth during the heating process. A runnerless molding device for thermosetting resin and rubber, wherein the valve pin is movably inserted into the bush so that the valve pin can be opened and closed in connection with the operation of discharging the flowable material. .
[0016]
(10) A runnerless molding method capable of continuously molding a raw material fluid such as a thermosetting resin and rubber while maintaining a low temperature uncured or unvulcanized state, wherein a supplied fluid raw material is movable. After supplying the fluid into the runner bush and moving the movable runner bush, the fluid raw material in the movable runner bush is immediately brought into contact with the gate of the cavity so as to be in the “gate open” state, and is immediately discharged into the cavity. While moving the valve pin forward to the "gate closed" state, while keeping the valve pin in the "gate closed" state, the movable runner bush is separated from the gate side to form an adiabatic space, and then the inside of the cavity is opened. During the heat treatment and curing or vulcanization, the molded article is taken out, and during the heat treatment in the cavity or during the removal of the molded article after the heat treatment, The retracting Rubupin by returning to the initial state as a state of "valve open", runner-less molding method such as a thermosetting resin and a rubber, characterized by comprising to perform repetitive operation again.
[0017]
(11) The fluid material to be supplied is supplied to one or more movable runner bushes via a manifold, and the valve pins which are vertically passed through each movable runner bush have a shape of the valve pin and a gate for moving the valve pin forward and backward. The method of forming a runnerless method of thermosetting resin and rubber according to the above (10), characterized in that the opening / closing timings for each of the steps (1) and (2) are changed so that the filling balance at the time of the multipoint gate can be freely obtained.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
[0019]
In each of the drawings, reference numeral 1 denotes a cavity formed between a cavity plate 2 of one mold and a core plate 3 of the other mold indicated by a chain line (not shown in detail), and 4 is open to the cavity plate 2 side. Gate 5, 5 is an expanded circular hole having a conical bottom 6 drilled on the side of the cavity plate 2 with the gate 4 as the center, 7, 8 are heat insulating plates that are fixedly mounted on the cavity plate 2; It shows a back plate, and small holes 9 and 10 which are communicated with the expanding hole 5 and are smaller than the diameter of the expanding hole 5 are formed. Numeral 11 denotes a recess provided on the lower peripheral edge of the inner circumference of the expanding circular hole portion 5, which has a heat insulating effect. Reference numeral 13 denotes a cylindrical hole which is disposed through the small holes 9 and 10 in the heat insulating plate 7 and the first back plate 8 while forming a gap 12 along the inner periphery of the enlarged circular hole 5. The air gap is formed between the temperature control bush and the cavity plate 2 by the gap 12. Then, the head of the cylindrical hole-shaped temperature adjusting bush 13 is pressed against the surface of the first back plate 8 by the sleeve 13a, and the cylindrical hole-shaped temperature adjusting bush 13 is firmly fixed. The temperature control bush 13 is formed with a temperature control hole 14 whose outer cylindrical structure is formed by an air gap in the space. The first back plate 8 is provided in the temperature control hole 14. An opening 14a is provided which can communicate with a temperature regulating fluid, such as air or an inert gas, which communicates with the inside.
[0020]
Reference numeral 15 denotes a cylindrical movable runner bush slidably disposed in the cylindrical hole-shaped temperature control bush 13, and a tip thereof is formed with a conical head 15 a coinciding with the conical bottom 6. A dish-shaped heat-insulating bush 16 is provided on the conical head 15a to form an air gap 17 located between the conical bottom 6 and the outer periphery of the gate 4 and independent of the air gap of the gap 12. I can do it. Reference numeral 18 denotes a valve pin disposed in the center axis direction of the movable runner bush 15 so that the gate 4 can be opened and closed through the movable runner bush 15 and the center holes 19 and 20 of the dish-shaped heat insulating bush 16. Has become.
[0021]
Reference numeral 21 denotes a runner portion formed in the movable runner bush 15 and the pressing rod 38, in which the flowing raw material for pouring stays, and is provided through an opening 37 of the pressing rod 38 to which the base of the movable runner bush 15 is fixed. It communicates with a runner section 23 of the manifold 22. Although the pressing rod 38 is formed separately from the movable runner bush 15 in the drawing, it may be formed as an integral structure. In this case, it is a matter of course that the opening 37 is provided in the movable runner bush 15 which is integrated.
[0022]
Reference numeral 24 denotes a runner sliding mechanism for moving the movable runner bush 15 forward and backward, for example, a piston-cylinder mechanism, and a second back disposed on the first back plate 8 via a first spacer block 25. The cylinder portion 24a is fixed to the plate 26, the tip of the piston portion 24b is fixed to the manifold 22, and the movable runner bush 15 is movable via the manifold 22.
[0023]
Reference numeral 27 denotes a valve sliding mechanism for moving the valve pin 18 forward and backward, for example, a piston cylinder mechanism, and a fixed-side mounting plate disposed above a second back plate 26 via a second spacer block 28. 29, a cylinder portion 27a is fixed, and a tip of the piston 27b is fixed to a base portion of the valve pin 18, and is fixed to a detachable valve pin operation plate 30 disposed on the second back plate 26, via the valve pin operation plate 30. Thus, the valve pin 18 is movable.
[0024]
Reference numeral 31 denotes a raw material injection nozzle disposed on the fixed side mounting plate 29, and a runner portion of the manifold 22 provided with a movable injection hole portion 32 which communicates with the injection nozzle 31 and has a slidable configuration. 23.
[0025]
Although the drawing shows the configuration of two-piece molding with the cavity 1 formed at two locations, the present invention can be applied not only to a multiple-cavity molding but also to a single-cavity configuration with one cavity 1. .
[0026]
Further, only the configuration in which one movable runner bush 15 is disposed in the temperature control bush 13 is shown, but the cross-sectional structure of one temperature control bush 13 is enlarged to form a plurality of holes (gap 12). The expanded circular hole 5 and the small holes 9 and 10 may be provided vertically, and a number of movable runner bushes may be arranged in parallel in this hole.
[0027]
Reference numeral 33 denotes a number of temperature control holes formed in the cavity plate 2, the first and second back plates 8, 26, and the manifold 22, and a flowable material for molding is processed together with the temperature control holes 14 in the cavity 1. The flow holes for water, oil, gas or the like to be flown so as not to be thermally cured before are shown. Numeral 34 denotes a heating means capable of heating such as a heater or other heating medium disposed on the cavity plate 2 for heating and hardening the flowable raw material filled in the cavity 1. Reference numeral 35 denotes a sprue bush forming the injection nozzle 31, and reference numeral 36 denotes a locating ring disposed on the outer periphery of the sprue bush 35, which accurately and air-tightly contacts the nozzles of various molding machines for material outflow with the injection nozzle 31. Figure 2 shows a positioning ring for positioning.
[0028]
Based on the above configuration, the operation of the present invention, that is, the molding method will be described with reference to FIGS. 3 (a), 3 (b), 3 (c) and 3 (d).
[0029]
A specific thermosetting resin or rubber material is previously uncured or unvulcanized, that is, in the state of a fluid material, stays in the runner portion 21 of the movable runner bush 15 from the injection nozzle 31 through the runner portion 23 of the manifold 22. 3A, the tip of the valve pin 18 is held and placed in a state penetrating the center holes 19 and 20 at the tip of the movable runner bush 15.
[0030]
That is, the runner piston-cylinder mechanism 24 and the valve piston-cylinder mechanism 27 are inactively held and placed. The movable-side core plate 3 shown by a dashed line is retracted, and the cavity 1 is formed open. Put it without any.
[0031]
Next, the core plate 3 moves forward and abuts on the fixed side cavity plate 2 side, and the cavity 1 is formed, and the piston-cylinder mechanism 24 for the runner is operated, and the piston portion 24b moves forward and is fixed to the manifold 22. The movable runner bush 15 is slid forward in the cylindrical hole-shaped temperature control bush 13, and the conical head 15 a at the tip comes into contact with the conical bottom 6 via the dish-shaped heat insulating bush 16, Thereby, the air gap 17 is formed, and the center hole 19 of the movable runner bush 15 communicates with the gate 4 of the cavity 1 via the center hole 20 of the dish-shaped heat insulating bush 16 (see FIG. 3B). .
[0032]
In the drawing, the air gap 17 is formed with a recess in the conical bottom 6 so that it can be formed between the conical bottom 15 and the conical bottom 15a. The air gap 17 can be formed in the same manner by forming a recess on the side of the portion 15a (not shown).
[0033]
In this state, the valve pin 18 is not inserted into the gate 4 and is in the “valve open” state, and the flowable material can be injected. By obtaining the pouring operation force of the various forming machines for pouring, the required amount of the flowable raw material remaining in the runner portion 23 of the manifold 22 and the runner portion 21 of the movable runner bush 15 is injected into the cavity 1 from the gate 4 in a required amount. Can be.
[0034]
Simultaneously with the completion of the injection of the fluidized raw material into the cavity 1, the valve piston cylinder mechanism 27 is operated, the piston portion 27b advances, the valve pin 18 also advances via the valve pin operation plate 30, and the distal end is a movable runner. It is inserted into the gate 4 through the center hole 19 of the bush 15 and the center hole 20 of the dish-shaped heat-insulating bush 16, and the opening of the gate 4 is closed, so that a so-called "valve closed" state shown in FIG. be able to.
[0035]
Then, the piston portion 24b of the movable runner bush 15 immediately retreats by the action of the runner piston cylinder mechanism 24, and retreats in the cylindrical temperature-adjusting bush 13, and as shown in FIG. The space can be retracted to a sufficiently separated position, and a space, that is, a heat insulation space A can be formed between the tip of the movable runner bush 15 in the cylindrical hole-shaped temperature control bush 13.
[0036]
In this state, the uncured resin or unvulcanized resin filled in the cavity 1 is heated by a heating means 34 such as a heater in a heat treatment for curing and molding, and the molded article which has been heated is molded on the movable side. The molded product of the cavity 1 can be taken out by a usual method by moving the core plate 3 and separating it from the fixed cavity plate 2. The valve pin 18 is retracted by the operation of the valve piston cylinder mechanism 27 at a desired time during a period from the start of the hardening of the uncured resin or the uncured resin to the time when the hardening resin reaches the complete hardening, and as a whole, FIG. State can be restored.
[0037]
Since the first molding operation is completed as described above, the same molded product can be mass-produced by repeating the same operation and repeating.
[0038]
An embodiment of the present invention has been described above. Next, another embodiment in which the configuration of the runner portion sliding mechanism and the valve sliding mechanism is different from the first embodiment will be described with reference to FIG. 5 (a), 5 (b), 5 (c) and 5 (d) will be described.
[0039]
In the drawings, the same reference numerals as those in the first embodiment denote the same components, and a detailed description thereof will be omitted.
[0040]
That is, in the second embodiment, the valve pin 18 fixed to the tip of the piston 27b of the piston cylinder mechanism 27 corresponding to the valve sliding mechanism is provided on the center axis of the piston cinder mechanism 24 corresponding to the runner sliding mechanism. The cylinder portion 24a and the piston portion 24b of the piston cylinder mechanism for runner 24 are disposed on a cylinder plate 26A instead of the second back plate 26, and are fixed to the fixed side adjacent to the cylinder plate 26A. The mounting plate 29 is configured by disposing the cylinder portion 27a and the piston portion 24b of the valve piston cylinder mechanism 27 described above.
[0041]
The piston portion 24b of the runner piston-cylinder mechanism 24 is directly connected to the base of the movable runner bush 15A, and the slide tube portion 39 for inserting the valve pin 18 is provided on the shaft.
[0042]
In addition, the opening 37 communicating the runner portion 21 of the movable runner bush 15A and the runner portion 23 of the manifold 22 allows the uncured or unvulcanized raw material to be always communicated by the sliding action of the movable runner bush 15A. When there is no problem, the movable runner bush 15A can be formed to be long in the sliding direction regardless of the sliding position. The state in which the runner part 23 of 22 and the runner part 21 of the movable runner bush 15A are communicated can be maintained (not shown).
[0043]
Under the above-described configuration, the injection molding process of the uncured and unvulcanized state of the thermosetting resin and rubber is performed by the injection molding shown in FIGS. 3A, 3B, 3C, and 3D of the first embodiment. FIGS. 5 (a), 5 (b), 5 (c) and 5 (d) show the steps corresponding to the steps. FIGS. 3 (a), 3 (b) and 3 (c) show details of the steps of the forming operation. And (d).
[0044]
Therefore, to explain briefly, the uncured and unvulcanized fluid raw material moves from the operation position indicating preparation for molding in FIG. 5A to the operation position for starting injection molding in FIG. 5), the operation position of the heat-curing and vulcanization molding of “gate closed” in FIG. 5D becomes the operation position, and the removal operation of the molded product by retreating the valve pin 18 is completed, and then the operation shown in FIG. ), And the first molding step is completed.
[0045]
In the course of the forming process, the opening 37 of the movable runner bush 15A is displaced in a non-flowing state with the runner 23 of the manifold 22 at the sliding position in FIGS. 5 (a) and 5 (d).
[0046]
Next, still another different embodiment of the present invention will be described.
[0047]
In each of the above embodiments, the movable runner bush is shown as a configuration that slides in the temperature control bush. However, the temperature control bush is omitted, and the movable runner bush itself has the temperature control function. By doing so, exactly the same molding apparatus and molding method can be implemented.
[0048]
FIG. 6 shows a representative example in an enlarged cross section.
[0049]
The movable runner bush 15B in which the valve pin 18 is vertically slidably provided has a runner portion 21 in which the valve pin 18 can slide in the center, and a hollow temperature control space portion 40 is formed along the outer periphery of the runner portion 21. A desired fluid such as water, oil, air, or an inert gas is supplied as a temperature control medium into the temperature control space 40, and a thermosetting resin, unvulcanized rubber, or the like flowing through the movable runner bush 15B. The liquid raw material is prepared so as to prevent the possibility of being hardened by the heat transmitted from the mold, and to prevent the temperature of the flow raw material from dropping so as to always maintain an appropriate temperature state.
[0050]
Therefore, the base of the movable runner bush 15B is fixed to the manifold 22 similarly to the configuration shown in the above-described embodiment, and the temperature control fluid disposed in the manifold 22 and the temperature control space through the opening 40a. The movable runner bush 15B main body may be movably disposed in the through hole 41 penetrating the cavity plate 2, the heat insulating plate 7, the first back plate 8, etc., which constitute the mold, while communicating with the portion 40. It is permissible to slide between the through hole 41 and to move back and forth through the gap without sliding.
[0051]
According to this configuration, the temperature of the movable runner bush 15B can be controlled at all times during operation, and the movable runner bush 15B itself exhibits exactly the same operation as that of the above-described embodiment. I do.
[0052]
By the way, in the above-described embodiment, the multi-gate and multi-cavity multi-cavity is applied to a multi-molded product using a manifold. Can be targeted. In this case, by changing variously the shape of each valve pin and the timing of opening and closing the valve pin with respect to the gate by the individual piston-cylinder mechanism for operating the valve pin, the filling balance at the time of the multipoint gate can be made flexible. it can.
[0053]
In addition, since an opening / closing system using a valve pin is provided as an embodiment, the gate diameter can be set from a small diameter to a large diameter according to the size and shape of the gate, and the filling pressure is reduced for a large diameter. In addition, the internal pressure can be reduced and the internal pressure can be reduced, which leads to the reduction of the product stress, which helps to solve the problem of the product, and further shortens the filling time, that is, increases the injection molding injection rate.
[0054]
In any of the embodiments, the structural devices can be implemented by arranging them in the horizontal direction on the left and right as well as the vertical configuration as shown in the figure.
[0055]
Examples of the thermosetting resin that can be used in the present invention include urea resin, phenol resin, melamine resin, furan resin, alkyd resin, unsaturated polyester resin, diallyl phthalate resin, epoxy resin, silicon resin, and polyurethane resin. Styrene-butadiene rubber, ethylene-propylene rubber, ethylene-propylene terpolymer, butadiene rubber, high styrene rubber, isoprene rubber, butyl rubber, halogenated butyl rubber, bilin rubber, chlorinated polyethylene. And all materials such as ethylene-acryl rubber.
[0056]
【The invention's effect】
According to the present invention, when a fluid material such as a thermosetting synthetic resin or rubber filled in a cavity is heated to a curing temperature or a heating temperature, the movable runner bush is movably retracted to a position separated from the gate of the cavity. A runner that forms a heat insulating space by heating and retains uncured or unvulcanized flowing resin due to the temperature control effect of various fluids flowing through the temperature control holes provided in each part on the fixed side and the heat insulating effect of the air gap. The high-temperature heating of the cavity to the part is insulated and the runner part is inadvertently heated, so that the flowing resin inside is not heat-cured or vulcanized. The gate can be opened and closed properly and reliably by moving it forward and backward along the center axis of the Can the product secondary processing such as processing useless, and can completely prevent the derivation of sprue runner.
[0057]
Therefore, it is possible to eliminate sprue runners which are conventionally caused in molding processes such as injection, compression, and transfer of thermosetting resin and rubber, and to reduce material loss, secondary processing costs and industrial waste, and to reduce material costs. -It has the effect of improving economic efficiency such as processing costs and industrial waste disposal costs, and reducing the burden on the global environment.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a runnerless molding apparatus for thermosetting resin and rubber according to the present invention; FIG. 2 is an enlarged sectional view of a main part of FIG. 1 FIG. FIG. 3 (b) is a longitudinal sectional view showing a sequential forming process. FIG. 3 (c) is a longitudinal sectional view showing a sequential forming process. FIG. 3 (d) is a sequential forming process. FIG. 4 is a longitudinal sectional view of a main part showing another embodiment. FIG. 5 (a) is a longitudinal sectional view of a sequential molding process. FIG. 5 (b) is a longitudinal section of a sequential molding process. FIG. 5 (c) is a longitudinal sectional view of a sequential molding process. FIG. 5 (d) is a longitudinal sectional view of a sequential molding process. FIG. 6 is an enlarged sectional view showing another embodiment of a movable runner bush. Explanation of code]
Reference Signs List 1 cavity 4 gate 13 temperature control bush 14 air gap temperature control holes 15, 15A, 15B movable runner bush 18 valve pin 21, 23 runner portion 22 manifold 24 runner sliding mechanism, such as piston cylinder mechanism 27 valve sliding mechanism For example, piston cylinder mechanism 31 material injection nozzle 37 opening 40 temperature control space A heat insulation space

[0007]
(1) An injection nozzle capable of injecting a thermosetting resin or rubber raw material maintained in an uncured or unvulcanized low temperature state, and supplied directly or indirectly from the injection nozzle and the injection nozzle. A movable movable runner bush capable of holding the raw material in an uncured and unvulcanized low-temperature state, a cylindrical temperature-controlled bush that holds the movable runner bush and is movably disposed, and The movable runner bush is provided with a center hole provided at the end of the movable runner bush and a cavity communicating with the gate through a gate, and a valve pin for vertically opening and closing the gate is provided movably in the movable runner bush. In the heating state in which the material was filled in the cavity, the valve pin closed the gate, and the movable runner bush was separated from the gate and separated from the gate. Forming a heat-insulating space in a warm bush, runnerless molding apparatus, such as a thermosetting resin and a rubber, characterized in that to be able to hold the material of the movable runner bush in a low temperature state.

[0016]
( 9 ) A runnerless molding method capable of continuously molding a raw material fluid such as a thermosetting resin and rubber while maintaining a low temperature uncured and unvulcanized state, wherein a supplied fluid raw material is movable. It is supplied into the runner bush, and the movable runner bush is movably moved within the cylindrical temperature-controlling bush. after issuing Note in the cavity, immediately advances the valve pin with a state of "gate closed", as one likes held in a state of "gate closed" in this valve pin, to distract from the gate side movable runner bush, wherein the temperature regulating the heat insulating space portion is formed in the bush, and then taken out molded article was molded by curing or vulcanization by heating the cavity, the heat treatment in the cavity Alternatively, during removal of the molded product after the heat treatment, the thermosetting resin is characterized in that the valve pin is retracted to return to the initial state as the “valve open” state, and the operation is repeated again. And runnerless molding methods for rubber and the like.

[0017]
( 10 ) The supplied flowable material is supplied to one or more movable runner bushes via a manifold, and the valve pins vertically passed through each movable runner bush have a shape of the valve pin and a gate for moving the valve pin forward and backward. The runnerless molding method of thermosetting resin and rubber as described in the above item ( 9 ), characterized in that the opening / closing timings of each of the steps (1) and (2) are changed so that the filling balance at the time of the multipoint gate can be obtained freely.

[0007]
(1) uncured, was maintained at a low temperature state of the unvulcanized, an injection nozzle capable of injecting a thermosetting resin or a rubber material, the injection nozzle and the injected nozzle by Rikyo feeding by material A movable movable runner bush that can be maintained in an uncured and unvulcanized low-temperature state, a cylindrical temperature-controlled bush that holds the movable runner bush and is movably disposed, and moves in the temperature-controlled bush. The movable runner bush is provided with a cavity communicating with a center hole provided at the end of the movable runner bush through a gate, and a valve pin for vertically opening and closing the gate through the movable runner bush is provided movably. In the heating state in which the raw material is filled, the valve pin closes the gate, and the movable runner bush separates from the gate and moves away from the gate in the temperature control bush. Forming a thermal space, runner-less molding device such as a thermosetting resin and a rubber, characterized in that to be able to hold the material of the movable runner bush in a low temperature state.

[0016]
(9) A runner-less molding method capable of continuously molding a raw material fluid such as a thermosetting resin and rubber while maintaining a low temperature uncured or unvulcanized state, wherein a supplied fluid raw material is movable. fed into the runner bush, the movable runner bush by movable moved within tubular temperature control bush, firstly, the flow material in the movable runner bush is brought into contact with the gate of the cavity in a state of "gate open" Immediately after being poured into the cavity, the valve pin is advanced to be in the "gate closed" state, and the movable runner bush is separated from the gate side while keeping the valve pin in the "gate closed" state. A heat-insulating space is formed in the tone bush, and then the inside of the cavity is heat-treated and molded by curing or vulcanization, and a molded product is taken out. During the taking out a molded article after heat treatment, by retracting the valve pin and is returned to the initial state as a state of "gate open", a thermosetting resin, characterized by comprising to perform repetitive operation again And runnerless molding methods for rubber and the like.

[0033]
In this state, the valve pin 18 is not inserted into the gate 4 and is in the “ gate open” state, and the flowable material can be injected. By obtaining the pouring operation force of the various forming machines for pouring, the required amount of the flowable raw material remaining in the runner portion 23 of the manifold 22 and the runner portion 21 of the movable runner bush 15 is injected into the cavity 1 from the gate 4 in a required amount. Can be.

[0034]
Simultaneously with the completion of the injection of the fluidized raw material into the cavity 1, the valve piston cylinder mechanism 27 is operated, the piston portion 27b advances, the valve pin 18 also advances via the valve pin operation plate 30, and the distal end is a movable runner. The gate 4 is inserted into the gate 4 through the center hole 19 of the bush 15 and the center hole 20 of the dish-shaped heat-insulating bush 16, and the opening of the gate 4 is closed to obtain a so-called " gate closed" state shown in FIG. be able to.

[0001]
TECHNICAL FIELD OF THE INVENTION
This invention relates to a runner-less forming form how such a thermosetting resin and a rubber.

[0016]
( 1 ) A runnerless molding method capable of continuously molding a raw material fluid such as a thermosetting resin and rubber while maintaining a low temperature uncured and unvulcanized state, wherein a supplied fluid raw material is movable. The movable runner bush is supplied into the runner bush, and the movable runner bush is movably moved within the cylindrical temperature-controlling bush. Immediately after being poured into the cavity, the valve pin is advanced to be in the "gate closed" state, and the movable runner bush is separated from the gate side while keeping the valve pin in the "gate closed" state. A heat-insulating space is formed in the control bush, and then the inside of the cavity is heated and molded by curing or vulcanization to take out a molded product. Alternatively, during the removal of the molded product after the heat treatment, the valve pin is retracted to return to the initial state as the "gate open" state, and the operation is repeated again, characterized by the thermosetting property Runnerless molding method for resin and rubber.

[0017]
( 2 ) The fluid material to be supplied is supplied to one or more movable runner bushes via a manifold, and the valve pins vertically passed through each movable runner bush have a shape of the valve pin and a gate for moving the valve pin forward and backward. The method of forming a runnerless method of thermosetting resin and rubber according to the above ( 1 ), characterized in that the opening / closing timings of the thermosetting resin and the rubber are changed so as to freely obtain a filling balance at the time of multipoint gate.

Claims (11)

An uncured, uncured, movable runner bush capable of flowing fluid material supplied from an injection nozzle maintained at a low temperature in an uncured state is slidably disposed in a temperature-controlling bush communicating with a gate of a cavity. During the heat treatment, the distance between the movable runner bush and the gate is increased to form an adiabatic space, and a valve pin is movably inserted into the movable runner bush. A runner-less molding apparatus for thermosetting resin and rubber, wherein the gate can be opened and closed. 2. The thermosetting thermosetting material according to claim 1, wherein a runner sliding mechanism for sliding the movable runner bush in the temperature control bush and a valve sliding mechanism for opening and closing the gate with a valve pin are separately provided. Runnerless molding equipment for resin and rubber. One or more movable runner bushes through which the valve pin is inserted are provided, and a temperature control bush through which the movable rawner bush can be inserted through the injection nozzle through the manifold so as to allow the flow of the flowing raw material to be poured out is provided. 3. The runnerless molding apparatus for thermosetting resin and rubber according to claim 1 or 2, wherein one or more multi-gates corresponding to the number of runner bushes are formed so that multi-gate multi-cavity or multi-gate single cavity can be obtained. The runnerless molding apparatus for thermosetting resin and rubber according to any one of claims 1 to 3, wherein the temperature control bush has a porous structure in which one or more movable runner bushes can be arranged. The runnerless molding device for thermosetting resin and rubber according to any one of claims 1 to 4, wherein the movable runner bush is provided with a heat insulating bush attached to a peripheral surface of a center hole at a tip end. The runner such as a thermosetting resin and rubber according to any one of claims 1 to 5, wherein the movable runner bush is provided with an opening in a base portion communicating with the runner portion of the manifold in the runner portion of the movable runner bush. Less molding equipment. The heat insulating bush of the movable runner bush is configured such that an air gap can be formed on the outer periphery of the gate between the heat insulating bush and the conical bottom formed on the cavity plate side when contacting the gate side. A runnerless molding device for thermosetting resin and rubber according to any one of 3, 4, and 5. 8. The thermosetting thermosetting material according to claim 1, wherein when a sleeve for fixing the base of the movable runner bush is provided, the sleeve is provided with a runner portion and an opening communicating with the runner portion of the manifold. Runnerless molding equipment for resin and rubber. A temperature control mechanism is provided on a movable movable runner bush through which a flowing raw material supplied from an injection nozzle maintained at a low temperature in an uncured and unvulcanized state is provided. In the hole, the movable runner bush and the gate are spaced apart to form an adiabatic space, and the movable runner bush is disposed in the movable runner bush. A runner-less molding device for thermosetting resin and rubber, wherein the valve pin is movably inserted so that the gate can be opened and closed by the valve pin in connection with the operation of discharging the flowable material. A runner-less molding method capable of continuously molding a raw material fluid such as a thermosetting resin and rubber while maintaining a low-temperature uncured or unvulcanized state. After moving the movable runner bush, the movable rawner bush is first brought into contact with the gate of the cavity and the flow material in the movable runner bush is discharged into the cavity in the "gate open" state. Then, the movable runner bush is separated from the gate side to form an adiabatic space while the valve pin is kept in the "gate closed" state, and the cavity is heated. The molded product is taken out by curing or vulcanizing, and the molded product is taken out. The first state is returned to, runner-less molding method such as a thermosetting resin and a rubber, characterized by comprising to perform the iterative operation again retracted as the state of the "valve open" a. The supplied fluid raw material is supplied to one or more movable runner bushes via a manifold, and the valve pins which are vertically passed through each movable runner bush have the shape of this valve pin and the opening and closing of a gate for moving the valve pin forward and backward. 11. The method for molding a runnerless material such as a thermosetting resin and a rubber according to claim 10, wherein the timing is changed respectively to freely obtain a filling balance at the time of multipoint gate.

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