JP6913330B2 - Valve system and casting nylon molding equipment - Google Patents

Description

The present invention relates to a valve system capable of controlling the flow path and flow rate of raw materials, and a casting nylon molding apparatus provided with the valve system.

Conventionally, as a casting nylon molding device used for manufacturing nylon molded products, it is supplied from two raw material tanks, a measuring means (measuring pump) that sucks and measures raw materials in each raw material tank, and those measuring means. A mixing and stirring unit for mixing and stirring raw materials and a molding mold for pouring the mixed and stirred raw materials in the mixing and stirring unit are known (Patent Document 1). A valve is provided between the raw material tank and the measuring pump and between the measuring pump and the tank body of the mixing / stirring unit to control the flow path and flow rate of the raw material passing through the inside.

Japanese Patent No. 6396619

The structure of a conventional valve is complicated, and there are many parts where raw materials remain (so-called dead), so maintenance is troublesome.

An object of the present invention is to provide a valve system having a simpler structure and excellent maintainability than a conventional valve, and a casting nylon molding apparatus provided with the valve system.

[Valve system]
The valve system of the present invention is a valve system mounted on a flow path through which a liquid (raw material or cleaning liquid) flows, and is a base body, a valve body mounted on the base body, and a rotation for rotating the valve body. It is provided with a mechanism and a heating means for heating the base body and the valve body. The base body includes an accommodating portion for accommodating the valve body and an in-base flow path through which the liquid flows, and includes a first in-base flow path, a second in-base flow path, and a third in-base flow path as the in-base flow path. ing. The valve body is provided with a dogleg-shaped in- valve flow path having an inlet and an outlet through which liquid flows. The base body and the valve body are heated above the melting point of the liquid by the heating means. The valve body is designed to rotate in the accommodating portion by the operation of the rotation mechanism , and when the valve body is rotated by the rotation mechanism, the flow path of the raw material and the inlet of the flow path in the valve communicate with the flow path in the first base. The outlet of the inner flow path communicates with the inner flow path of the second base, or the inlet of the inner flow path of the valve communicates with the inner flow path of the second base, and the outlet of the inner flow path of the valve communicates with the inner flow path of the third base. are to switched Erare so that in the state.

[Casting nylon molding equipment]
The casting nylon molding apparatus of the present invention is a casting nylon molding apparatus for pouring a raw material into a molding mold to mold a nylon molded product, and is a raw material tank for storing the raw material and a weighing means for measuring the raw material in the raw material tank. A valve system that controls the flow path of the raw material supplied from the raw material tank, a mixing and stirring unit that mixes and stirs the raw material supplied from the measuring means, and a molding mold that pours the mixed and stirred raw material in the mixing and stirring unit. I have. The valve system of the present invention is used as the valve system. The raw material tank, measuring means, valve system, mixing stirring unit and molding mold have two or more liquid flow paths so that the raw material can be supplied in the order of raw material tank-valve system-measuring means-valve system-mixing stirring unit-molding mold. It is connected with.

[Valve system]
The valve system of the present invention has a simpler structure than a conventional valve, and has no dead other than the flow path inside the valve, so that it is excellent in maintainability.

[Casting nylon molding equipment]
Since the cast nylon molding apparatus of the present invention includes the valve system of the present invention, it has the same effect as that of the valve system.

The conceptual diagram which shows an example of the casting nylon molding apparatus of this invention. An enlarged view of part A in FIG. B arrow view of FIG. (A) is a front explanatory view in a state where the inlet of the valve inner flow path communicates with the first base inner flow path and the outlet of the valve inner flow path communicates with the second base inner flow path, and (b) is the valve inner flow. The side view of the state where the inlet of the path communicates with the flow path in the first base, and the outlet of the flow path in the valve communicates with the flow path in the second base. (A) is a front explanatory view in a state where the inlet of the valve inner flow path communicates with the second base inner flow path and the outlet communicates with the third base inner flow path. (2) Side explanatory view of a state in which the outlet communicates with the inner flow path of the third base and communicates with the inner flow path of the third base. (A) is a perspective view showing an example of a valve body, and (b) is a perspective view showing another example of the valve body. (A) is an explanatory view of the support mechanism on the side provided with the pinion, and (b) is an explanatory view of the support mechanism on the side without the pinion. Explanatory drawing which shows an example of a rotation mechanism. (A) is an explanatory view of a state before rotating the valve body by the rotation mechanism of FIG. 8, and (b) is an explanation after rotating the valve body at the position (a) by 90 degrees by the rotation mechanism of FIG. figure. Schematic diagram of the stirrer. Schematic diagram of the stirring device and the lifting means. Explanatory drawing of the internal structure of the opening / closing plug. It is an operation explanatory view of the opening and closing plug which opens and closes the discharge port of a mixing agitation tank, (a) shows the state which the discharge port is closed by the opening and closing plug, (b) is the state which the opening and closing plug rises and the discharge port is An indication of the open state. FIG. 1 is an enlarged view of part C in FIG. (A) is an explanatory view of a state before rotating the valve body by the rotation mechanism, and (b) is an explanatory view after rotating the valve body at the position (a) by 90 degrees by the rotation mechanism. (A) is a plan view showing an example of a detachable block set on the opening / closing lid, and (b) is an explanatory view showing an example of a holding arm and an arm lock for holding the detachable block.

(Embodiment)
An example of an embodiment of the valve system and the casting nylon molding apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory view of a casting nylon molding apparatus provided with the valve system of the present invention. In FIG. 1, 1 is a raw material tank, 2 is a measuring means, 3 is a mixing and stirring unit, 4 is a molding mold, 5 is a liquid flow path, 6 is a vacuum tank, 7 is a valve system of the present invention, and 8 is a cleaning device. ..

The raw material tank 1 is for storing the raw material, the measuring means 2 is for sucking and weighing the raw material in the raw material tank 1 and supplying it to the mixing and stirring unit 3, and the mixing and stirring unit 3 is the raw material supplied from the measuring means 2. The mold 4 is for molding the supplied raw material into a predetermined shape, the liquid flow path 5 is a flow path through which the raw material passes, and the vacuum tank 6 is a vacuum inside. The valve system 7 is a device for controlling the flow path and the flow rate of the raw material, and the cleaning device 8 is a device for cleaning the mixing / stirring unit 3.

In this embodiment, the valve system 7 is installed in the flow path through which the raw material flows (the front end of the raw material tank 1) and the flow path through which the cleaning liquid flows (the front end of the cleaning device 8). The configurations of both valve systems 7 are the same, but for convenience of explanation, the former will be distinguished as the valve system 7X and the latter as the valve system 7Y in the following.

As shown in FIGS. 1 to 3, the casting nylon molding apparatus of this embodiment has two raw material tanks 1 (hereinafter, one is referred to as “raw material tank 1a” and the other is referred to as “raw material tank 1b”) and weighs. It is provided with two means 2 (hereinafter, one is referred to as "measuring means 2a" and the other is referred to as "measuring means 2b"), one mixing / stirring unit 3 and one molding die 4.

In each of the raw material tanks 1a and 1b, each measuring means 2a and 2b, the valve system 7, the mixing and stirring unit 3 and the molding die 4, the raw materials are the raw material tank 1a, 1b-valve system 7-weighing means 2a, 2b-valve system 7-. The mixing and stirring unit 3-is connected by two or more liquid flow paths 5 so as to flow in the order of the molding die 4.

Further, the cleaning device 8, the valve system 7, and the mixing / stirring unit 3 are connected by two or more liquid flow paths 5 so that the cleaning liquid is supplied in the order of the cleaning device 8-valve system 7-mixing / stirring unit 3.

[Raw material tank]
As an example, the raw material tanks 1a and 1b shown in FIGS. 1 to 3 are containers for storing raw materials. Although not shown, each of the raw material tanks 1a and 1b is provided with a raw material input port, an inert gas introduction port, and a discharge port. The raw material input port is an opening for inputting the raw material, the inert gas introduction port is an opening for supplying an inert gas such as nitrogen gas, and the discharge port is an opening for discharging the raw material to the outside of the raw material tanks 1a and 1b. .. The discharge port is provided with first liquid flow paths 51a and 51b.

In this embodiment, heaters (not shown) are mounted on the outer circumferences of the respective raw material tanks 1a and 1b so that the raw materials inside can be held at a predetermined temperature. As the raw material tanks 1a and 1b, those provided with a jacket can also be used. In this case, the temperatures of the raw material tanks 1a and 1b are raised by a heat medium, steam, or the like. In either case, it is preferable to maintain the temperature control in the temperature range of 80 to 140 ° C. The raw material tanks 1a and 1b are provided with stirring blades 14a and 14b driven by the motors M1a and M1b so that the raw materials in the raw material tanks 1a and 1b are stirred.

In the raw material tanks 1a and 1b of this embodiment, regardless of whether or not the raw materials are stored, they are held in an inert gas atmosphere such as nitrogen gas in order to prevent adverse effects due to external moisture and oxygen. be. The catalyst and initiator added to the raw material may be affected by moisture and oxygen in the air, and the polymerization activity may decrease or disappear when affected by moisture and oxygen. If the polymerization activity of the catalyst is reduced or eliminated, it becomes difficult to obtain a good cast nylon molded product, which is not preferable.

When molding nylon molded products, raw material materials are stored in these raw material tanks 1a and 1b. Specifically, the raw material A is stored in one raw material tank 1a, and the raw material B is stored in the other raw material tank 1b. Raw material A is a mixture of substantially anhydrous ε-caprolactam and a predetermined amount of catalyst. If necessary, a soft component such as ω-laurolactam, a liquid polyether that does not inhibit the polymerization reaction, or a liquid polybutadiene can be added as long as it is in the range of 20% by weight or less.

Raw material A is solid at room temperature. The raw material A can be melted and liquefied at a temperature of ε-caprolactum at a melting point of about 68 ° C. or higher in a facility (not shown) before being charged into the raw material tank 1a. It can also be melted and liquefied within 1a. The raw material A is kept in the raw material tank 1a under an atmosphere of an inert gas such as nitrogen gas at a temperature of 80 to 140 ° C., preferably 90 to 120 ° C. under stirring.

Substantially anhydrous ε-caprolactam can be obtained by depressurizing ε-caprolactam in a solid state or a molten state with a vacuum pump or the like to remove water contained in ε-caprolactam.

Examples of the catalyst blended in the raw material A include alkali metals such as sodium and potassium, alkali metal derivatives such as sodium hydride and sodium alcoholate, alkaline earth metals and alkaline earth metal derivatives, alkali metal derivatives and alkaline earth. A known ω-lactam catalyst or the like, such as a reaction product of a metal derivative and ε-caprolactam, can be used. The amount of the catalyst added is in the range of 0.5 to 5 mol% with respect to ε-caprolactam, and can be appropriately determined in consideration of the weight and wall thickness of the cast nylon molded product.

The raw material B stored in the other raw material tank 1b is a mixture of substantially anhydrous ε-caprolactam and a predetermined amount of initiator. If necessary, a soft component such as ω-laurolactam, a liquid polyether that does not inhibit the polymerization reaction, or a liquid polybutadiene can be added as long as it is in the range of 20% by weight or less.

Raw material B is solid at room temperature. The raw material B can be melted and liquefied at a temperature of ε-caprolactum at a melting point of about 68 ° C. or higher in a facility (not shown) before being charged into the raw material tank 1b. It can also be melted and liquefied within 1b. The raw material B is kept in the raw material tank 1b at a temperature of 80 to 140 ° C., preferably 90 to 120 ° C. under an atmosphere of an inert gas such as nitrogen gas under stirring.

As the initiator to be blended in the B raw material, for example, known ω-lactam initiators such as N-acetylcaprolactam, acid chlorides, isocyanates, carbonates, isocyanurates and the like can be used. The amount to be added is in the range of 0.2 to 3 mol% with respect to ε-caprolactam, and can be appropriately determined in consideration of the weight and wall thickness of the cast nylon molded product.

[Weighing means]
As an example, the measuring means 2a and 2b shown in FIGS. 1 and 2 include cylinders 21a and 21b and pistons 22a and 22b. The cylinders 21a and 21b are kept under heating temperature control in a temperature range of 80 to 140 ° C., preferably 90 to 120 ° C. As the heat source for heating the cylinders 21a and 21b, a heat medium or steam is used when the cylinders 21a and 21b have a jacket structure, and an electric heater is used when the cylinders 21a and 21b do not have a jacket structure. The cylinders 21a and 21b are arranged so as to communicate with the pocket 75b of the cylinder assembly block 75, which will be described later.

The raw material is weighed according to the moving position of the pistons 22a and 22b and the number of reciprocations. As the measuring means 2a and 2b, the above-mentioned pump capable of measuring and sending liquid can be used. As a specific example, a piston pump, a rotary pump having a plunger, or the like can be used. Each of the weighed raw materials is sent to the valve system 7 by the pistons 22a and 22b.

The pistons 22a and 22b shown in FIG. 1 are relay gears 27a that mesh with the drive devices (drive motors) M2a and M2b, the main gears 26a and 26b attached to the output shafts of the drive motors M2a and M2b, and the main gears 26a and 26b. , 27b and two driven gears 28a, 28b that mesh with the relay gears 27a, 27b.

Drive shafts 29a and 29b are inserted into the insertion holes of the driven gears 28a and 28b, and the driven gears 28a and 28b are fixed to the drive shafts 29a and 29b. Piston heads 25a and 25b are provided at the tips of the drive shafts 29a and 29b. Seal packings (not shown) are attached to the outer circumferences of the piston heads 25a and 25b so that the cylinders 21a and 21b and the pistons 22a and 22b are hermetically sealed during stationary and forward / backward sliding. ..

As the seal packing, an existing one made of resin, rubber, or the like can be used. Silicone resin developed earlier by the applicant, specifically reactive liquid silicone, for example, Silicone RTV rubber from Momentive Performance Materials Japan LLC (eg, TSE3477 (RTV: Room Temperature Vulcanizing) : Room temperature (room temperature) curing type)) or silicone resin such as Shinetsu Chemical Industry Co., Ltd.'s silicone RTV rubber (for example, KE-1417, KE-1314) contains 5 to 5 potassium octatitanate fibers or potassium hexatitate fibers. A silicone resin kneaded by 25% by weight can also be used.

In this embodiment, the drive motors M2a and M2b are provided on the outside of the piston and above (higher position) than the reciprocating motion axis (axis line L shown by the alternate long and short dash line in FIG. 1). The seal packing is a consumable part and deteriorates as it is used many times. When deteriorated, the raw material may leak to the drive motors M2a and M2b and adhere to the drive motors M2a and M2b. If the raw material leaks, not only the weighing becomes unstable, but also operating troubles may occur in the pistons 22a and 22b and the drive motors M2a and M2b. By providing the drive motors M2a and M2b at a position higher than the reciprocating movement shaft L as in the present embodiment, the above-mentioned problem due to deterioration of the seal packing can be avoided.

[Valve system]
The valve system 7X is a device for controlling the flow path and flow rate of each raw material in the raw material tanks 1a and 1b. As an example, the valve system 7X shown in FIGS. 1 to 3 includes a base body 71, a valve body 72 mounted on the base body 71, and a support mechanism 73 (FIGS. 7 (a) and 7 (b)) for supporting the valve body 72. , A rotating mechanism 74 (FIGS. 8 and 9 (a) and (b)) for rotating the valve body 72, a cylinder assembly block 75, and a heating means (not shown) for heating the base body 71 and the valve body 72. I have.

As shown in FIGS. 4 (a) and 4 (b) and 5 (a) and 5 (b), the base body 71 of this embodiment is a horizontally long box-shaped member, and has a concave shape for accommodating the valve body 72 on the front surface side thereof. Two accommodating portions 71a are formed side by side. Each accommodating portion 71a is a concave portion having a pyramid shape (a shape in which the head of the pyramid is cut off by a plane parallel to the bottom surface) that tapers from the front surface side to the back surface side. The tapered surface on the inner circumference of the accommodating portion 71a has the same angle as the tapered surface of the valve body 72.

A rod heater (not shown) is embedded in the base body 71 so that the rod heater 71 and the valve body 72 mounted on the base body 71 are heated by the rod heater. In the bar heater, the base body 71 and the valve body 72 are always set to a temperature equal to or higher than the melting point of the raw material, specifically, 68 ° C. or higher, which is the melting point of ε-caprolactam.

The base body 71 of this embodiment is provided with three (six in total) in-base flow paths 71b to 71d communicating with each accommodating portion 71a. One of the three base inner flow paths 71b to 71d (hereinafter referred to as "first base inner flow path") 71b is located at a position connecting the block inner flow path 75c of the cylinder assembly block 75 and the accommodating portion 71a, which will be described later. The other one (hereinafter referred to as "second base inner flow path") 71c is located at a position connecting the accommodating portion 71a and the vertically elongated hole 75a of the cylinder assembly block 75 described later, and the other one (hereinafter referred to as "third base inner flow path"). 71d is provided at a position connecting the accommodating portion 71a and the liquid flow paths (second liquid flow paths) 52a and 52b described later. The number of flow paths in the base can be more or less than three.

As shown in FIG. 6A, the valve body 72 of this embodiment has a pyramidal shape (a shape in which the head of the pyramid is cut off by a plane parallel to the bottom surface) having a tapered outer peripheral surface. It includes a valve body 72a and a columnar shaft portion 72b projecting from the bottom surface side of the valve body 72a.

The valve body 72 of this embodiment is made of fluororesin, specifically, polytetrafluoroethylene. Fluororesin such as polytetrafluoroethylene is excellent in thermal conductivity and heat retention, so that the raw material is hard to solidify and defects due to clogging of the raw material are hard to occur.

In this embodiment, it is necessary to keep the base body 71 and the valve body 72 at 68 ° C. or higher, which is the melting point of ε-caprolactam. There is an advantage that defects due to clogging are less likely to occur.

As shown in FIG. 6A, the valve body 72a of each valve body 72 is provided with a “dogleg” -shaped in-valve flow path 72c through which raw materials flow. The inlet and outlet of the valve inner flow path 72c are open to the tapered outer peripheral surface of the valve body 72a.

The tapered outer peripheral surface of the valve body 72a housed in the accommodating portion 71a of the base body 71 is in contact with the tapered inner peripheral surface of the accommodating portion 71a, including when rotating and when stationary. By keeping the outer peripheral surface of the valve body 72a and the inner peripheral surface of the accommodating portion 71a in constant contact with each other, leakage of raw materials is unlikely to occur. Each valve body 72 is supported by a support mechanism 73 (FIGS. 7A and 7B) so that the valve body 72a is accommodated in the accommodating portion 71a.

As shown in FIGS. 7A and 7B, the support mechanism 73 of this embodiment includes a pedestal portion 73a, a support plate 73b erected on the pedestal portion 73a, and a support shaft 73c penetrating the support plate 73b. A bearing 73d provided on the tip end side of the support shaft 73c and a holder 73e attached to the outer periphery of the bearing 73d are provided.

The holder 73e has a tubular shape, and the shaft portion 72b of the valve body 72 is inserted into the tip thereof. The valve body 72 is fixed to the holder 73e by a connector 73f inserted through both the holder 73e and the shaft portion 72b.

As shown in FIG. 8, the rotation mechanism 74 of this embodiment includes a valve drive motor M4, a linear head (not shown) connected to the valve drive motor M4, a rack 74a connected to the linear head, and the like. For a pinion 74b that rotates by engaging with a rack 74a, a valve main gear 74c attached to the same holder 73e as one valve body 72, and a valve attached to the same holder 73e as the other valve body 72. It is equipped with a slave gear 74d.

The valve drive motor M4 is provided on the pedestal portion 73a. An existing linear head can be used. In this embodiment, an LH linear head (model number: 4IK25GN-SW2M + 4LB45N-1) manufactured by Oriental Motor Co., Ltd. is used as the linear head.

As shown in FIGS. 7 (a) and 7 (b), the pinion 74b is attached to a holder 73e (FIG. 7 (a)) for holding one valve body 72 (the valve body 72 on the right side of FIG. 8 in this embodiment). Only installed. The valve main gear 74c is attached to one holder 73e of the support mechanism 73, and the valve slave gear 74d is attached to the other holder 73e of the support mechanism 73.

In the valve system 7X having the above configuration, as shown in FIG. 9A, the inlet of the valve inner flow path 72c of both valve bodies 72 faces sideways in the same figure, and the outlet faces downward (third base inner flow path 71d). When the valve drive motor M4 (FIG. 8) is rotated in the forward direction in the state of communicating with the valve drive motor M4 (FIG. 8), a gear in a linear head (not shown) rotates, and the rotation of the gear causes the rack 74a to rotate in S1 of FIG. 9 (a). Slide in the direction of the arrow.

When the rack 74a slides in the direction of the S1 arrow in FIG. 9A, the valve body 72 and the valve main are attached to the pinion 74b engaged with the rack 74a and the same holder 73e (FIG. 7A) as the pinion 74b. The gear 74c rotates 90 degrees in the direction of the R1 arrow in FIG. 9A.

When the valve main gear 74c rotates in the direction of the R1 arrow in FIG. 9 (a), the valve slave gear 74d that engages with the valve main gear 74c rotates 90 degrees in the direction of the R2 arrow in FIG. 9 (a). , The valve body 72 held by the same holder 73e (FIG. 7 (b)) as the valve slave gear 74d rotates 90 degrees in the direction of the R2 arrow in FIG. 9 (a).

As a result, both valve bodies 72 are in a state where the inlet of the valve inner flow path 72c faces upward and the outlet faces downward as shown in FIGS. 9 (b). The inlet of the valve inner flow path 72c communicates with the first base inner flow path 71b, and the outlet communicates with the second base inner flow path 71c.

On the contrary, as shown in FIG. 9B, the valve drive motor M4 (FIG. 8) is rotated in the opposite direction with the inlet of the valve inner flow path 72c of both valve bodies 72 facing upward in the figure and the outlet facing sideways. When rotated to, a gear in a linear head (not shown) rotates, and the rotation of the gear causes the rack 74a to slide in the direction of the S2 arrow in FIG. 9B.

When the rack 74a slides in the direction of the S2 arrow in FIG. 9B, the valve body 72 and the valve main are attached to the pinion 74b engaged with the rack 74a and the same holder 73e (FIG. 7A) as the pinion 74b. The gear 74c rotates 90 degrees in the direction of the R3 arrow in FIG. 9B.

When the valve main gear 74c rotates 90 degrees in the direction of the R3 arrow in FIG. 9 (b), the valve slave gear 74d that engages with the valve main gear 74c rotates in the direction of the R4 arrow in FIG. 9 (b). , The valve body 72 held by the same holder 73e (FIG. 7 (b)) as the valve slave gear 74d rotates 90 degrees in the direction of the R4 arrow in FIG. 9 (b).

As a result, both valve bodies 72 are in a state in which the inlet of the valve inner flow path 72c faces sideways in the figure and the outlet faces downward in the figure as shown in FIGS. 9 (a) and 5 (a) and 5 (b). As described above, the inlet communicates with the second base inner flow path 71c, and the outlet communicates with the third base inner flow path 71d.

The valve system 7X described here is an example, and the valve system 7X may have other configurations.

[Cylinder assembly block]
The cylinder assembly block 75 is a flat plate-shaped block arranged between the base body 71 and the cylinders 21a and 21b. As shown in FIGS. 4A and 4B and FIGS. 5A and 5B, the cylinder assembly block 75 of this embodiment is provided with two vertically elongated holes 75a vertically on the surface on the base body 71 side. Has been done. The two vertically elongated holes 75a are provided at equal intervals with the two second base inner flow paths 71c so as to communicate with the two second base inner flow paths 71c provided in the base body 71.

Pockets 75b are provided on the surfaces of the cylinder assembly block 75 on the cylinder 21a and 21b sides. Although not shown, the pocket 75b of this embodiment is provided with two sets of two semicircular recesses arranged one above the other. Of the two recesses constituting each pocket 75b, the upper recess is arranged so that the arc-shaped portion is on the upper side, and the lower recess is arranged so that the arc-shaped portion is on the lower side. Each recess communicates with the flow path 71c in the second base.

Above the pocket 75b of the cylinder assembly block 75, two in-block flow paths 75c penetrating in the wall thickness direction are provided at intervals. The flow path 75c in each block is inclined downward from the cylinders 21a and 21b to the base body 71 side. The openings (inlet) on the cylinder 21a and 21b sides of the flow path 75c in the block communicate with the first liquid flow paths 51a and 51b of the raw material tanks 1a and 1b, and the opening (outlet) on the base body 71 side is the first of the base body 71. It communicates with the flow path 71b in the base.

The valve system 7X of this embodiment is connected to the raw material tanks 1a and 1b, the measuring means 2a and 2b, and the mixing and stirring unit 3.

Specifically, the first liquid flow paths 51a and 51b provided in the raw material tanks 1a and 1b communicate with the block inner flow path 75c of the cylinder assembly block 75 and the first base inner flow path 71b of the base body 71, respectively. The cylinders 21a and 21b of the measuring means 2a and 2b are connected so as to communicate with the vertically elongated holes 75a and the pockets 75b of the cylinder assembly block 75 and the flow path 71c in the second base of the base body 71. , The second liquid flow paths 52a and 52b are connected so as to communicate with the third base inner flow path 71d of the base body 71.

As a result, the raw materials in the raw material tanks 1a and 1b are the raw materials in the raw material tanks 1a and 1b-each first base inner flow path 71b-each valve inner flow path 72c-each second base inner flow path 71c-each cylinder 21a, 21b. -Each third base inner flow path 71d-Second liquid flow paths 52a and 52b flow in this order, and the mixture is mixed and stirred in the mixing and stirring unit 3 (tank body 31 described later).

In this embodiment, the base body 71 and the cylinder assembly block 75 are separate bodies, but both can be integrated. If not required, the cylinder assembly block 75 can be omitted.

[Mixing and stirring unit]
As an example, the mixing and stirring unit 3 shown in FIG. 1 includes a tank body 31 for storing raw materials supplied from the measuring means 2a and 2b, an opening / closing lid 32 for opening and closing an opening above the tank body 31, and a tank body 31 inside. The mixing and stirring means 33 for mixing and stirring the raw materials of the above, and the raising and lowering means 34 (FIGS. 10 and 11) for raising and lowering the mixing and stirring means 33 are provided.

The tank body 31 of this embodiment has a tubular shape with an opening at the top, and has a discharge port 31a at the bottom for discharging the raw material. The tank main body 31 is provided with a gently sloping surface from the peripheral wall portion toward the discharge port 31a so that the raw material is guided to the discharge port 31a without delay.

A heater H is mounted on the outer periphery of the tank body 31 so that the inside of the tank body 31 can be maintained at a temperature of 80 to 140 ° C, preferably 90 to 120 ° C. A jacket-equipped mixing / stirring unit 3 can also be used. In this case, as in the case of the raw material tank 1, the temperature is raised by a heat medium, steam, or the like. Also in this case, it is preferable that the temperature is maintained in the temperature range of 80 to 140 ° C., preferably 90 to 120 ° C. Although not shown, a cover or the like for preventing burns may be provided on the outer periphery of the tank body 31.

The opening above the tank body 31 can be opened and closed with the opening / closing lid 32. The opening / closing lid 32 is provided with an input port 32a for taking in raw materials in the tank body 31. The second liquid flow paths 52a and 52b are inserted into the charging port 32a so that the raw materials A and B measured by the measuring means 2a and 2b are charged into the tank body 31. The opening / closing lid 32 may be provided with a charging port (not shown) for charging pigments and various fillers (glass fiber, carbon fiber, etc.).

In the present invention, unlike the conventional mixing head, pigments and various fillers can be charged into the tank body 31 and mixed in the tank body 31. By making it possible to put pigments and fillers into the tank body 31, it is possible to manufacture a plurality of types of raw materials simply by changing the tank body 31 without changing the raw material tanks 1a and 1b for each pigment or filler. Therefore, various types of molded products can be manufactured at low cost, and it can be said that the expandability is high as compared with various conventional devices. Pigments, fillers, and the like may be added through the opening of the tank body 31.

The opening / closing lid 32 may be provided with a gas introduction port 32b used when injecting a gas such as nitrogen gas into the tank main body 31. In this case, by introducing a gas injection means (not shown) into the gas introduction port 32b and injecting the gas with the gas injection means, the gas can be introduced (injected) into the tank body 31. What is injected may be other than nitrogen gas as long as it is a water-free (substantially anhydrous) gas (dry gas).

In the example shown in FIG. 1, the second liquid flow paths 52a and 52b are connected to the inlet 32a of the opening / closing lid 32, and the fourth liquid flow path 54 joins the second liquid flow paths 52a and 52b. However, the second liquid flow paths 52a and 52b and the fourth liquid flow path 54 can be individually connected to the inlet 32a of the opening / closing lid 32.

In this case, the detachable block 9 as shown in FIGS. 16A and 16B can also be used. The detachable block 9 has a horizontally rectangular shape, and an insertion portion 91 that can be inserted into three insertion ports 32a provided in the opening / closing lid 32 is projected on the bottom surface side thereof. Through holes 92 are provided in each of the insertion portions 91 so that the second liquid flow paths 52a and 52b and the fourth liquid flow path 54 can be inserted. The inserted second liquid flow paths 52a and 52b and the fourth liquid flow path 54 are connected to the attachment / detachment block 9 by being screwed into a female screw formed on the inner peripheral surface of the through hole 92.

A packing (O-ring) 32c is provided on the inner peripheral surfaces of the three inlets 32a. When the insertion portion 91 is inserted into the insertion port 32a, the packing 32c comes into contact with the outer peripheral surface of the insertion portion 91.

The detachable block 9 is held on the opening / closing lid 32 by two holding arms 93 that hold the detachable block 9 laterally in the width direction and an arm lock 94 that holds the upper ends of both holding arms 93. Each holding arm 93 includes a standing portion 93a and a holding portion 93b protruding inward from the standing portion 93a. The lower end side of each holding arm 93 is pivotally supported by the opening / closing lid 32 so that the holding arm 93 can rotate in a direction approaching the attachment / detachment block 9 and a direction away from the attachment / detachment block 9.

When both holding arms 93 are rotated in a direction approaching the attachment / detachment block 9 with the insertion portion 91 inserted into the insertion port 32a of the opening / closing lid 32, the holding portion 93b of both holding arms 93 abuts on the upper surface of the attachment / detachment block 9. .. An arm lock 94 is attached to the upper end of both holding arms 93 that have stood up. When both holding arms 93 are held by the arm lock 94, the attachment / detachment block 9 is pressed against the opening / closing lid 32 by the pressing portion 93b of both holding arms 93, and the attachment / detachment block 9 is held at that position.

On the other hand, when the arm lock 94 is removed and both holding arms 93 are rotated in directions away from each other, the holding by the holding portion 93b of both holding arms 93 is released, and the detachable block 9 can be removed from the opening / closing lid 32.

The attachment / detachment block 9 can be held and removed in a state where the second liquid flow paths 52a and 52b and the fourth liquid flow path 54 are attached (fixed) to the attachment / detachment block 9. As a result, when a problem occurs in the second liquid flow path 52a, 52b, the fourth liquid flow path 54, or the mixing / stirring unit 3, the second liquid flow path 52a, 52b and the fourth liquid flow path 54 are attached. By removing the detachable block 9 in this state, quick measures can be taken.

The inside of the tank body 31 is in a pressurized state when injecting nitrogen gas or the like, and is in a depressurized state when the raw material is poured into the molding die. The pressure state and the decompression state are maintained. Further, in the pressurized state, a force in the pushing-up direction acts on the detachable block 9, but the detachable block 9 is inadvertently dropped by the double holding arm 93 for holding the detachable block 9 and the arm lock 94 for holding both the holding arms 93. Is prevented.

The opening / closing lid 32 may be omitted depending on the structure of the tank body 31 or the structure of the vacuum tank 6.

In this embodiment, the tank body 31 is mounted on the mounting table 35. The mounting table 35 may be provided as needed, and may be omitted if it is not needed. The mounting table 35 has a built-in heater for heating (not shown). The heating heater may be provided as needed, and may be omitted if it is not needed.

In this embodiment, the temperature sensor 36 is inserted into the tank body 31 so that the temperature of the raw material in the tank body 31 can be measured. The temperature sensor 36 may be provided as needed, and may be omitted if it is not needed.

The raw materials in the tank body 31 are mixed and stirred by the mixing and stirring means 33. FIG. 10 shows an example of the mixing and stirring means 33. In FIG. 10, 33a is a stirring shaft inserted into the tank body 31, 33b is a stirring blade detachably provided on the stirring shaft 33a, and 33c is an opening / closing stopper (opening / closing) provided at the tip (lower end) of the stirring shaft 33a. Means), 33d is a spline shaft provided above the stirring shaft 33a, 33e is a pressing spring that presses the opening / closing stopper 33c downward, 33f is a coupling that connects or separates the stirring shaft 33a and the spline shaft 33d, and M3 is. A drive motor that rotates the connected spline shaft 33d and stirring shaft 33a (hereinafter, both are collectively referred to as "rotation shaft"), 33g is the first pulley fixed to the output shaft of the drive motor M3, and 33h is the spline shaft 33d. The second pulley fixed to the outer periphery of the above, 33i is a transmission belt circulated around the outer periphery of the first pulley 33g and the second pulley 33h, 33j is a bearing fixed to the spline shaft 33d, and 33k is a casing.

The stirring blade 33b mixes and stirs the raw materials in the tank body 31. In this embodiment, the case where the number of stirring blades 33b is one is taken as an example, but the number of stirring blades 33b may be two or more. The stirring blade 33b can be replaced with one having a different size and shape depending on the application.

The on-off plug 33c opens and closes the discharge port 31a provided in the tank body 31. The opening / closing plug 33c of this embodiment is a member having a size and shape that fits into the inner circumference of the discharge port 31a. The lower end side of the stirring shaft 33a is rotatably held in the opening / closing stopper 33c. A bearing 37 and an oil seal 38 are provided in a portion of the stirring shaft 33a that is inserted into the opening / closing stopper 33c. A ring-shaped packing P2 (sealing member) that seals between the opening / closing plug 33c and the discharge port 31a is attached to the outer periphery of the opening / closing plug 33c, and is formed from between the inner peripheral surface of the discharge port 31a and the outer peripheral surface of the opening / closing plug 33c. It is designed to prevent inadvertent leakage of raw materials. In this embodiment, an O-ring is used as the packing P2.

As shown in FIG. 12, in this embodiment, the taper angle (inclination angle) of the on-off plug 33c and the taper angle of the discharge port 31a are different angles, and when the discharge port 31a is closed by the on-off plug 33c, The upper side of the packing P2 and the opening / closing plug 33c touching the inner surface of the discharge port 31a, but the lower side of the packing P2 does not touch the inner surface of the discharge port 31a. As a result, even when the opening / closing plug 33c thermally expands in the tank body 31, there is an advantage that problems such as liquid leakage are less likely to occur.

In this embodiment, the opening / closing plug 33c is made of aluminum, but it may be made of other than aluminum as long as it has predetermined heat resistance and chemical resistance. In this embodiment, the stirring shaft 33a and the stirring blade 33b rotate, and the opening / closing plug 33c itself does not rotate, so that the packing P2 does not wear due to sliding. As a result, the risk that the packing P2 is damaged and mixed with the raw material is reduced.

In this embodiment, the case where the opening / closing stopper 33c is provided on the stirring shaft 33a is taken as an example. However, instead of the stirring shaft 33a, the opening / closing stopper 33c is provided at the tip of the non-rotating support shaft, and the stirring shaft 33a and the stirring blade are provided. The 33b may be configured to rotate by another mechanism.

As in this embodiment, the method using the on-off plug 33c (hereinafter referred to as the "binsen method") prevents clogging of the raw material by self-cleaning, which was not possible with the method using the valve (hereinafter referred to as the "valve method"). can do.

That is, in the conventional valve method, when a raw material sticks to a discharge pipe (discharge pipe), the raw material may cause clogging and the device may have to be stopped to clean the valve. In the pipe method, the raw material stuck to the discharge port 31a can be pushed out (cleaned) by the opening / closing plug 33c, so that clogging is unlikely to occur, and there is no need to stop the device as in the valve method, and continuous operation is performed. Is possible.

The coupling 33f connects or separates the stirring shaft 33a and the spline shaft 33d. The stirring shaft 33a and the spline shaft 33d are connected during operation (when the stirring blade 33b is rotated during stirring or cleaning), but when the tank body 31 is removed, the coupling 33f is separated. So, both can be cut off.

In this embodiment, the parts that come into contact with the raw materials, such as the tank body 31, the stirring shaft 33a, the stirring blades 33b, and the opening / closing stopper 33c, are plated, specifically, electroless nickel plating capable of making the film thickness uniform or substantially uniform. The treatment is performed so that the raw materials, the cleaning liquid, and the like are less likely to adhere to these members.

It is also possible to prevent the raw materials from adhering to the parts where the raw materials such as the tank body 31, the stirring shaft 33a, the stirring blades 33b, and the opening / closing stopper 33c come into contact with the cleaning liquid, etc., by a method other than plating. The liquid repellent treatment can be applied to all the members that the raw materials come into contact with, such as the tank body 31, the stirring shaft 33a, the stirring blades 33b, and the opening / closing stopper 33c, or can be applied to any one or more.

In the present application, such processing that makes it difficult for raw materials, cleaning liquids, and the like to adhere is referred to as liquid repellent processing. The concept here that the raw material, cleaning liquid, etc. are less likely to adhere is that even if the raw material, cleaning liquid, etc. adhere, air (gas injected from the gas injection means) is introduced (injected) to introduce (inject) the raw material, cleaning liquid, etc. It also includes the extent to which etc. can be blown off. The liquid-repellent treatment referred to in the present application also includes making it difficult for raw materials, cleaning liquids, and the like to adhere to each other by attaching a sheet or applying a paint.

The drive motor M3 is a drive source for rotating the rotating shaft, the first pulley 33g, the second pulley 33h, and the transmission belt 33i transmit the power of the drive motor M3 to the rotating shaft to rotate the rotating shaft. When the drive motor M3 is operated, the power is transmitted in the order of the first pulley 33g, the transmission belt 33i, and the second pulley 33h, and the rotating shaft rotates.

A bearing 33j for smoothing the rotation of the rotating shaft is provided on the outer circumference of the spline shaft 33d. For example, an existing timing pulley or the like can be used for the first pulley 33g and the second pulley 33h, an existing timing belt or the like can be used for the transmission belt 33i, and an existing radial bearing or the like can be used for the bearing 33j. ..

The elevating means 34 raises and lowers the opening / closing plug 33c inside the tank body 31 by raising and lowering the mixing and stirring means 33, and opens and closes the discharge port 31a of the tank body 31 from the inside of the tank body 31.

As an example, the elevating means 34 shown in FIG. 11 includes a guide body 34a, a slider 34b that moves up and down along the guide body 34a, and an actuator 34c that raises and lowers the slider 34b.

An existing linear guide, for example, Misumi Co., Ltd.'s linear guide (model number: SSE2BT16-230), etc. is used for the guide body 34a and the slider 34b, and an existing electric actuator, for example, an electric actuator of Oriental Motor Co., Ltd. (for example, Oriental Motor Co., Ltd.) is used for the actuator 34c. Product name: LAS2F90MW-2) and the like can be used.

13 (a) and 13 (b) show explanatory views before and after the mixing and stirring means 33 are moved up and down by the raising and lowering means 34. FIG. 13A shows a state before the mixing / stirring means 33 is raised, and FIG. 13B shows a state in which the mixing / stirring means 33 is raised by the raising / lowering means 34.

As shown in FIG. 13A, before raising the mixing / stirring means 33, the discharge port 31a of the mixing / stirring unit 3 is closed by the opening / closing plug 33c, and the raw material in the tank body 31 is discharged from the discharge port 31a. There is no such thing.

On the other hand, as shown in FIG. 13B, when the mixing / stirring means 33 is raised by the elevating means 34, the discharge port 31a of the tank body 31 is opened, and the raw material in the tank body 31 is discharged from the discharge port 31a. Will be done.

In this embodiment, the elevating means 34 automatically raises and lowers the mixing and stirring means 33. Specifically, the opening / closing plug 33c at the lowering position is automatically raised at the timing when a predetermined time elapses after the start of supply of the raw material from the measuring means 2 into the tank body 31, and the predetermined time elapses after the raising. At the timing, the opening / closing plug 33c in the ascending position is automatically lowered to the original position (closed position). The elevating means 34 can also be set to elevate at other timings.

For example, a viscosity detector (not shown) for detecting the viscosity of the raw material in the tank body 31 is installed in the tank body 31, and the viscosity of the raw material reaches a preset viscosity by the viscosity detector. , The elevating means 34 can also be set to elevate.

For the viscosity detector, for example, an existing torque meter or the like can be used. It is also possible to raise and lower the mixing and stirring means 33 by manually operating the raising and lowering means 34.

The casting nylon molding apparatus provided with the mixing and stirring unit 3 of this embodiment is different from the conventional casting nylon molding apparatus in which the mixing and stirring device is tilted to pour the raw material into the molding mold, and when the raw material is poured, dust and the like are collected. It is unlikely that foreign matter will get mixed in.

Further, in the conventional casting nylon molding apparatus, it is necessary to take out the cup of the mixing / stirring device, wash it, and dry it each time it is used. However, the casting nylon molding apparatus provided with the mixing / stirring unit 3 of the above embodiment. Then, since the tank body 31 can be washed and dried as it is without removing it, the risk of burns at the time of taking out the cup or cleaning the cup, which has been a problem of the conventional casting nylon molding apparatus, is low.

Further, in the casting nylon molding apparatus provided with the mixing / stirring unit 3 of the above-described embodiment, it is not necessary for the operator to manually clean the tank body 31 every time the tank body 31 is washed, and the washing work has been required so far. Since the time spent can be spent on other work (for example, demolding work), the work efficiency is significantly improved.

By introducing the mixing and stirring unit 3 of this embodiment, it is possible to realize a continuous casting nylon molding apparatus capable of continuous molding, which was not possible with the conventional batch type casting nylon molding apparatus. ..

The casting nylon molding apparatus provided with the mixing and stirring unit 3 of this embodiment can be put into practical use as a continuous casting nylon molding apparatus capable of continuous molding.

[Molding mold]
As the molding mold 4, in addition to a general metal mold, for example, a silicone molding mold for which the applicant of the present application, Nikko Giken Co., Ltd., has obtained a patent right can be used. This silicone molding mold is a mating mold and includes an injection port 41, a degassing 42, and a mating surface 43.

Silicone molding molds include commercially available reactive liquid silicones, such as silicone RTV rubber from Momentive Performance Materials Japan LLC (eg, TSE3477 (RTV: Room Temperature Vulcanizing: room temperature (room temperature) curing type)) and Shinetsu. It can be produced by using a silicone resin such as Silicone RTV Rubber (for example, KE-1417, KE-1314) manufactured by Chemical Industry Co., Ltd.

A silicone resin obtained by kneading 5 to 25% by weight of potassium octatiate fiber or potassium hexatitate fiber into a silicone resin, for example, a silicone resin for a silicone resin molding die (Patent No. 5747138) previously developed by the applicant. Can also be used. The molding mold 4 may be other than a metal mold or a silicone mold.

[Vacuum tank]
The vacuum chamber 6 is a case for accommodating the mixing and stirring unit 3, the molding die 4, and the like, and can create a vacuum inside. As an example, the vacuum chamber 6 shown in FIG. 1 includes an upper vacuum chamber 61 in which the mixing and stirring unit 3 is housed and a lower vacuum chamber 62 in which the molding die 4 is arranged. The vacuum chamber 6 preferably has a closed structure and can reduce the pressure to −0.09 MPa or less.

The configuration of the mixing and stirring unit 3 and the casting nylon molding apparatus provided with the mixing and stirring unit 3 is an example, and other configurations may be used. Further, not all of the configurations of the mixing and stirring unit 3 and the casting nylon molding apparatus are indispensable configurations, and they can be omitted as necessary.

[Washing device]
As shown in FIG. 14, the cleaning device 8 of this embodiment includes a cleaning liquid tank 81 containing a cleaning liquid used for cleaning the tank body 31 (FIG. 1), and a heater H mounted on the outer periphery of the cleaning liquid tank 81. A stirring blade 82 for stirring the cleaning liquid in the cleaning liquid tank 81 and a stirring motor M5 for rotating the stirring blade 82 are provided.

The cleaning liquid tank 81 of this embodiment is a bottomed container having an opening at the top. The upper opening of the cleaning liquid tank 81 is closed with a lid 83. The lid 83 is provided with an inlet 84 and an insertion port 85 through which the stirring blade 82 is inserted. A temperature sensor 86 may be provided in the cleaning liquid tank 81.

On the bottom surface of the cleaning liquid tank 81, a liquid flow path (third liquid flow path) 53 for discharging the cleaning liquid in the cleaning liquid tank 81 is provided. A valve system 7Y is provided at the tip of the third liquid flow path 53.

The valve system 7Y of this embodiment is the same as the valve system 7X. The differences are that there is one accommodating portion 71a, that there is one valve body 72, that the valve internal flow path 72c is linear as shown in FIG. 6B, that the valve main gear 74c and There is no valve slave gear 74d, there are two base inner flow paths communicating with the accommodating portion 71a (first base inner flow path 71b and second base inner flow path 71c), and there is no cylinder assembly block 75. Is.

The first base inner flow path 71b is located at a position connecting the third liquid flow path 53 and the accommodating portion 71a of the cleaning liquid tank 81, and the second base inner flow path 71c is the accommodating portion 71a and the liquid flow path (fourth liquid flow path) 54. It is provided at the position to connect with. The fourth liquid flow path 54 is a flow path connecting the base body 71 and the mixing / stirring unit 3.

The cleaning liquid in the cleaning liquid tank 81 is charged into the tank body 31 when cleaning the tank body 31. As the cleaning liquid, for example, caprolactam or the like can be used. After cleaning, the cleaning liquid adhering to the tank body 31 or the like can be removed by injecting a gas such as nitrogen gas.

In the valve system 7Y having the above configuration, as shown in FIG. 15A, the valve drive motor is in a state where the inlet of the valve inner flow path 72c of the valve body 72 faces the left side in the figure and the outlet faces the right side in the figure. When M4 (see FIG. 8) is rotated in the forward direction, a gear in a linear head (not shown) is rotated, and the rotation of the gear causes the rack 74a to slide in the direction of the S3 arrow in FIG. 15 (a).

When the rack 74a slides in the direction of the S3 arrow in FIG. 15A, the pinion 74b engaged with the rack 74a and the valve body 72 attached to the same holder 73e (see FIG. 14) as the pinion 74b are shown in FIG. Rotate 90 degrees in the direction of the R5 arrow.

As a result, as shown in FIG. 15B, the valve body 72 is in a state where the inlet of the valve inner flow path 72c faces upward and the outlet faces downward, and the inlet of the valve inner flow path 72c of the valve body 72 is the first. It communicates with the inner flow path 71b in one base, and the outlet communicates with the inner flow path 71c in the second base.

On the contrary, as shown in FIG. 15B, the valve drive motor M4 (FIG. 8) has the inlet of the valve inner flow path 72c of the valve body 72 facing upward in the figure and the outlet facing the lower side in the figure. (See) is rotated in the opposite direction, a gear in a linear head (not shown) is rotated, and the rotation of the gear causes the rack 74a to slide in the direction of the S4 arrow in FIG. 15 (b).

When the rack 74a slides in the direction of the S4 arrow in FIG. 15B, the pinion 74b engaged with the rack 74a and the valve body 72 attached to the same holder 73e (see FIG. 14) as the pinion 74b are shown in FIG. 15B. Rotate 90 degrees in the direction of the R6 arrow.

As a result, as shown in FIG. 15B, the valve body 72 is in a state where the inlet of the valve inner flow path 72c faces upward in the figure and the outlet faces downward in the figure, and the inlet becomes the first base inner flow path 71b. The outlet communicates with the second base inner flow path 71c.

The valve system 7 described here is an example, and the valve system 7 may have other configurations.

(Example of use)
An example of using the casting nylon molding apparatus of the above embodiment will be described.
(1) The raw material A is put in the raw material tank 1a, and the raw material B is put in the raw material tank 1b. The raw material tanks 1a and 1b are heated to a predetermined temperature before the raw material is charged.
(2) A state in which the inlets of the inner flow paths 72c of both valves of the valve system 7 and the inner flow paths 71b of the first base communicate with each other, and the outlets of the inner flow paths 72c of both valves and the inner flow paths 71c of the second base communicate with each other. In FIG. 9B), the raw material A in the raw material tank 1a is sucked into the measuring means 2a, and the raw material B in the raw material tank 1b is sucked into the measuring means 2b, and each raw material is weighed.
(3) After sucking the A raw material in the raw material tank 1a and the B raw material in the raw material tank 1b, both valve bodies 72 are rotated 90 degrees by the valve drive motor M4 of the valve system, and the flow path in the valve of each valve body 72. The inlet of 72c communicates with the second base inner flow path 71c, and the outlet of the valve inner flow path 72c communicates with the third base inner flow path 71d (see FIG. 9A).
(4) In the state of (3) above, the raw material A in the measuring means 2a and the raw material B in the measuring means 2b are sent out of both measuring means 2a and 2b. Each of the sent raw materials A and B passes through the second base inner flow path 71c, the valve inner flow path 72c, and the third base inner flow path 71d, and is supplied (charged) into the tank body 31. NS. The tank body 31 is heated to a predetermined temperature before charging both raw materials.
(5) Both raw materials charged into the tank body 31 are mixed and stirred for a predetermined time.
(6) After a lapse of a predetermined time, the mixing and stirring means 33 is automatically raised by the elevating means 34, the discharge port 31a closed by the opening / closing plug 33c is opened, and the mixed material in the tank body 31 is put into the molding die 4. Pour into. The molding die 4 is preheated to a predetermined temperature. The raised mixing / stirring means 33 automatically lowers to the original position after a lapse of a predetermined time, and the discharge port 31a is closed by the opening / closing plug 33c.
(7) After the mixed material is poured into the molding die 4, the vacuum chamber 6 is opened to perform vacuum fracture, and the inside of the vacuum chamber 6 is returned to atmospheric pressure. Due to the differential pressure generated at this time, the mixed material poured into the molding die 4 surely flows into the details of the molding die 4.
(8) The molding die 4 is taken out from the vacuum chamber 6 and removed after a lapse of a predetermined time. The nylon molded product taken out after demolding is shaped and completed. The demolding can also be performed during cleaning of the tank body 31.

Next, a method of cleaning the tank body 31 after molding will be described.
(1) Put the cleaning liquid into the cleaning device 8. The cleaning device 8 is heated to a predetermined temperature before the cleaning liquid is added.
(2) The valve drive motor M4 of the valve system 7 is operated, the inlet of the valve inner flow path 72c communicates with the first base inner flow path 71b, and the outlet of the valve inner flow path 72c communicates with the second base inner flow path 71c. The communication state (open state) is set (see FIG. 5B).
(3) When the opening state of (2) is reached, the cleaning liquid in the cleaning device 8 is charged (supplied) into the tank body 31. When a predetermined amount of cleaning liquid is charged, the valve drive motor M4 of the valve system 7 operates, and both the inlet and the outlet of the valve inner flow path 72c are both the first base inner flow path 71b and the second base inner flow path 71c. It is in a state of not communicating with any of the above (closed state) (see FIG. 5 (a)).
(4) After charging the cleaning liquid, the charging port 32a is closed with a lid for the charging port 32a (not shown) to operate the drive motor M3. As a result, the stirring blade 33b rotates in the tank body 31, and the inside of the tank body 31 is cleaned by the cleaning liquid that is stirred.
(5) After the cleaning is completed, the drive motor M3 is stopped to stop the stirring blade 33b.
(6) After confirming that the stirring blade 33b is stopped, the mixing and stirring means 33 is raised by the elevating means 34, the discharge port 31a closed by the opening / closing plug 33c is opened, and the cleaning liquid in the tank body 31 is opened. Is discharged to the outside of the tank body 31. At this time, by preparing a collection container for collecting the cleaning liquid below the discharge port 31a, the cleaning liquid can be discharged into the collection container.
(7) After the cleaning liquid is discharged, a gas such as nitrogen gas is introduced from the gas introduction port 32b to blow off the raw materials and the cleaning liquid adhering to the inside of the tank body 31 so that the next molding can be performed.

Since the valve systems 7X and 7Y of the present invention are provided with a fluororesin valve body, they are superior in thermal conductivity and heat retention as compared with conventional valves equipped with rubber packing and the like, and a flow path of ε-caprolactam. Is less likely to cause clogging.

The valve systems 7X and 7Y of the present invention have a simple structure, there is no dead other than the valve inner flow path, and the valve body is made of fluororesin so that ε-caprolactam does not easily remain in the valve inner flow path. Is easy or unnecessary. Further, since the cast nylon molding apparatus of the present invention includes the valve system of the present invention, the same effect as that of the valve system can be obtained.

The valve system of the present invention and the valve system of the casting nylon molding apparatus can be particularly preferably used when ε-caprolactam is used as a raw material.

1, 1a, 1b Raw material tank 14a, 14b Stirring blades 2, 2a, 2b Weighing means 21a, 21b Cylinder 22a, 22b Piston 25a, 25b Piston head 26a, 26b Main gear 27a, 27b Relay gear 28a, 28b Driven gear 29a, 29b Drive shaft 3 Mixing and stirring unit 31 Tank body 31a Discharge port 32 Opening and closing lid 32a Input port 32b Gas inlet 32c Packing 33 Mixing and stirring means 33a Stirring shaft 33b Stirring blade 33c Opening and closing plug (opening and closing means)
33d Spline shaft 33e Pressing spring 33f Coupling 33g First pulley 33h Second pulley 33i Transmission belt 33j Bearing 33k Casing 34 Lifting means 34a Guide body 34b Slider 34c Actuator 35 Mounting stand 36 Temperature sensor 37 Bearing 38 Oil seal 4 Note Inlet 42 Degassing 43 Mating surface 5 Liquid flow path 51a, 51b Liquid flow path (first liquid flow path)
52a, 52b liquid flow path (second liquid flow path)
53 Liquid flow path (third liquid flow path)
54 Liquid flow path (Fourth liquid flow path)
6 Vacuum chamber 61 Upper vacuum chamber 62 Lower vacuum chamber 7, 7X, 7Y Valve system 71 Base body 71a Accommodating part 71b In-base flow path (first in-base flow path)
71c In-base flow path (second in-base flow path)
71d In-base flow path (third base in-channel)
72 Valve body 72a Valve body 72b Shaft 72c Valve inner flow path 73 Support mechanism 73a Pedestal 73b Support plate 73c Support shaft 73d Bearing 73e Holder 73f Connector 74 Rotation mechanism 74a Rack 74b Pinion 74c Valve main gear 74d Gear 75 Cylinder assembly block 75a Vertical hole 75b Pocket 75c In-block flow path 8 Cleaning device 81 Cleaning liquid tank 82 Stirring blade 83 Lid 84 Input port 85 Insertion port 86 Temperature sensor 9 Detachable block 91 Insertion part 92 Through hole 93 Holding arm 93a Standing Part 93b Holding part 94 Arm lock H heater M1a, M1b Motor M2a, M2b Drive device (drive motor)
M3 drive motor M4 valve drive motor M5 stirring motor P2 packing

Claims (9)

A valve system installed in the flow path through which raw materials flow.
It is provided with a base body, a valve body equipped on the base body, a rotation mechanism for rotating the valve body, and a heating means for heating the base body and the valve body.
The base body includes an accommodating portion for accommodating the valve body and a flow path in the base through which raw materials flow.
As the in-base flow path, a first in-base flow path, a second in-base flow path, and a third in-base flow path are provided.
The valve body is provided with a dogleg-shaped in- valve flow path having an inlet and an outlet through which raw materials flow.
The base body and the valve body are heated above the melting point of the raw material by the heating means.
The valve body can rotate in the accommodating portion by the operation of the rotating mechanism.
When the valve body is rotated by the rotation mechanism, the flow path of the raw material communicates with the inlet of the inner flow path of the valve with the inner flow path of the first base, and the outlet of the inner flow path of the valve communicates with the inner flow path of the second base. The inlet of the valve inner flow path communicates with the second base inner flow path, and the outlet of the valve inner flow path communicates with the third base inner flow path .
The valve system is characterized by that. In the valve system according to claim 1,
The valve body is made of fluororesin,
The valve system is characterized by that. In the valve system according to claim 1,
The outer peripheral surface of the valve body housed in the housing part of the base body is in contact with the inner peripheral surface of the housing part.
The valve system is characterized by that. In the valve system according to claim 1,
The valve body is a pyramidal shape with a tapered outer peripheral surface.
The accommodating portion of the base body is provided with an inner peripheral surface that abuts on the tapered outer peripheral surface.
The valve system is characterized by that. In the valve system according to claim 1,
Two housings are provided on the base body,
A valve body is housed in each of the two housing parts.
One valve body is provided with a valve main gear, and the other valve body is provided with a valve slave gear that engages with the valve main gear.
The valve body provided with the valve main gear rotates in the same direction as the valve main gear by rotating the valve main gear.
In the valve body provided with the valve slave gear, the valve slave gear that engages with the valve main gear rotates in the direction opposite to the valve main gear due to the rotation of the valve main gear. Rotates in the same direction as the slave gear,
The valve system is characterized by that. In the valve system according to claim 1,
As the flow path in the base, a flow path in the first base, a flow path in the second base, and a flow path in the third base are provided.
In the valve body, the inlet of the valve inner flow path communicates with the first base inner flow path and the outlet communicates with the second base inner flow path, and the inlet of the valve inner flow path communicates with the second base inner flow path. Communicate, the outlet rotates between the communication position with the inner flow path in the third base,
The valve system is characterized by that. In a casting nylon molding device that molds a nylon molded product by pouring raw materials into a molding mold.
A raw material tank for storing raw materials and
A measuring means for measuring the raw materials in the raw material tank, and
A valve system that controls the flow path of the raw material supplied from the raw material tank,
A mixing and stirring unit that mixes and stirs the raw materials supplied from the measuring means, and
A molding mold for pouring the mixed and stirred raw materials in the mixing and stirring unit is provided.
The valve system is the valve system according to any one of claims 1 to 6.
The raw material tank, measuring means, valve system, mixing stirring unit and molding mold have two or more liquid streams so that raw materials can be supplied in the order of raw material tank-valve system-measuring means-valve system-mixing stirring unit-molding mold. Connected by road,
A casting nylon molding device characterized by this. In the casting nylon molding apparatus according to claim 7.
Equipped with a cleaning liquid tank for storing cleaning liquid
The cleaning liquid tank and the mixing / stirring unit are connected by a liquid flow path, and are connected.
A valve system was provided in the liquid flow path.
A casting nylon molding device characterized by this. In the casting nylon molding apparatus according to claim 7.
As a raw material tank, a first raw material tank for storing the first raw material and a second raw material tank for storing the second raw material are provided.
As the measuring means, a first measuring means for measuring the raw material in the first raw material tank and a second measuring means for measuring the raw material in the second raw material tank are provided.
A casting nylon molding device characterized by this.

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