JP3885404B2 - Reactive polymerization molding method and molding apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a reactive polymerization molding method and a molding apparatus. More specifically, the reaction stock solution can be shared regardless of the size and shape of the mold cavity, and is suitable for multi-mold molding. The present invention relates to a reactive polymerization molding method and a molding apparatus that can be used for the present invention.
[0002]
[Prior art]
  The reaction injection molding (RIM) method is a manufacturing method in which two or more reaction stock solutions are mixed in a mixing chamber, fed into a cavity of a mold apparatus, and subjected to injection molding while being reacted in the mold apparatus. This RIM method is suitably used when a polymer (molded body) is molded from a norbornene monomer.
  In such RIM molding, depending on the size and shape of the cavity of the mold, the time from the start of filling the reaction stock solution into the mold until the completion of filling is different. It is necessary to control the time (for example, gel time) from the start to the reaction start. That is, if the gel time is short, the reaction proceeds before filling is completed, and there is a possibility that good filling in the mold cannot be performed. If the gel time is too long, the production efficiency is deteriorated. .
[0003]
  Therefore, conventionally, in order to adjust the gel time and the like according to the size and shape of the mold cavity, one or both reaction stock solutions (compounds) contain a predetermined amount of reaction activity regulator. The reaction activity regulator was contained in a predetermined amount in either one or both of the casting tanks for preparing the prepared one or storing the reaction stock solution.
[0004]
[Problems to be solved by the invention]
  However, when RIM molding is performed using a reaction stock solution in which the reaction activity has been adjusted in advance as described above, each time the reaction stock solution is used in a different mold cavity size or shape. It was necessary to re-adjust the reaction activity. In addition, in the multi-mold molding method in which two or more reaction stock solutions are respectively sent from the same casting tank to a plurality of molds and a plurality of molded bodies are molded at a time, only molds having cavities of almost the same size and shape can be used. There was a problem that it could not be used. That is, in the conventional method, it has not been possible to realize multi-mold molding using molds having cavities of different sizes and shapes.
[0005]
  Also in normal RIM molding, when changing to a mold with a cavity of a different size or shape, put reaction stock solutions with different reaction activities into the casting tank or adjust the reaction activity inside the tank. It is necessary to adjust the reaction activity by adding an agent. At that time, the reaction stock solution used before replacing the mold may remain inside the tank or the piping from the tank to the mold, and the activity cannot be adjusted sufficiently. There are problems such as generation of defective products in stages, and a long time required for activity adjustment.
[0006]
  In addition, as shown in Japanese Patent Publication No. 6-20,787, three or more types of reaction stock solutions having different temperatures are prepared, and these temperatures vary depending on the shape, size, etc. of the molded product to be obtained. Attempts to perform RIM molding by controlling the reaction activity by changing the mixing ratio of the stock solution and adjusting the temperature of the reaction stock solution are known.
[0007]
  However, in this method, since the reaction activity is controlled only by adjusting the temperature of the reaction stock solution, there is a limit to the range of reaction activity control. Also, with this method, it has not been possible to realize multi-mold molding using molds having cavities of widely different sizes and shapes.
[0008]
  The present invention has been made in view of such a situation, and can be used for a reaction stock solution in a wide range regardless of the size and shape of the mold cavity, and can be suitably used for multi-mold molding. It is an object of the present invention to provide a reactive polymerization molding method and a molding apparatus capable of achieving the above.
[0009]
[Means for Solving the Problems]
  To achieve the above objective,
  (1) The “reactive polymerization molding method” according to the present invention is a reactive polymerization in which a reaction stock solution is supplied from two or more reaction stock solution supply means into a mold, and the reaction stock solution is reacted in the mold for polymerization. In the molding method, separately from the reaction stock solution supply means, a reaction activity regulator supply means for supplying a reaction activity regulator for controlling the reaction activity of the reaction stock solution in the mold into the mold is provided, When the reaction stock solution is supplied into the mold from two or more reaction stock solution supply means, the supply amount per unit time of the reaction activity regulator supplied from the reaction activity regulator supply means into the mold is at least two. The reaction activity regulator is supplied into the mold by changing the above steps.
  For example, when a reaction retarding agent that lowers the reaction activity is used as the reaction activity regulator, it is preferable that the supply amount at the end of injection is smaller than the supply amount at the beginning of the injection, and a reaction accelerator that enhances the reaction activity is used as the reaction activity regulator. When used, it is preferable that the supply amount at the end of injection is greater than the supply amount at the beginning of injection.
[0010]
  (2) It is preferable to control the supply amount of the reaction activity regulator supplied from the reaction activity regulator supply means into the mold in accordance with the size and shape of the molded article to be molded.
[0011]
  (3) It is preferable that the reaction stock solution contains a norbornene-based monomer.
[0012]
  (4) The “molding apparatus” according to the present invention includes at least one mold,
  Two or more reaction stock solution supply means for supplying the reaction stock solution to the mold;
  A reaction activity regulator supplying means provided separately from the reaction stock solution supply means, for supplying a reaction activity regulator for controlling the reaction activity of the reaction stock solution in the mold into the mold, and And a control means for changing the supply amount per unit time of the reaction activity regulator supplied from the reaction activity regulator supply means into the mold in at least two stages.
[0013]
  (5) The molding apparatus of the present invention is configured such that two or more reaction stock solutions are respectively supplied from the two or more reaction stock solution supply means into two or more molds, and the control means includes: It is preferable to individually control the supply amount of the reaction activity regulator supplied from the reaction activity regulator supply means to each mold.
[0014]
  (6) The reaction stock solution supply means is not particularly limited, and includes, for example, a casting tank for storing the reaction stock solution, a piping system from the tank to the mold, a valve, a pump, and the like. The reaction activity regulator supply means is not particularly limited, and includes, for example, an activity regulation tank for storing the reaction activity regulator, a piping system extending from the tank to the mold, a valve, a pump, and the like.
  Each mold is preferably equipped with a mixing means for mixing the reaction stock solution and the reaction activity regulator before being injected into the mold cavity. Such mixing means is not particularly limited, and examples thereof include a mixing head.
[0015]
  The control means is not particularly limited, and examples thereof include a control device that controls opening / closing of the valve and driving of the pump.
  A microcomputer or personal computer may be built in or connected to the control device. An output signal of a temperature sensor that detects the temperature of the reaction stock solution before being supplied to the inside of the mold cavity may be input to the control device, and a reaction activity regulator for the mold is determined according to the output signal. The supply amount may be controlled.
[0016]
  (7) In the present invention, “reactive polymerization molding” broadly means a method in which a reaction stock solution is reacted inside a mold and polymerized. As one aspect of the reactive polymerization molding method, reaction injection molding is used. Suppose there is a (RIM) method.
[0017]
  Reaction stock solution
  The reaction stock solution is not particularly limited, and examples thereof include urethane, urea, nylon, epoxy, unsaturated polyester, phenol, and norbornene, and the norbornene is particularly preferable. The reaction stock solution temperature before injection into the mold is preferably 10 to 60 ° C., and the viscosity of the reaction stock solution is usually 5 to 3,000 cps, preferably about 100 to 1,000 cps at 30 ° C., for example. is there.
[0018]
  Such a reaction stock solution may contain not only monomers but also catalysts and activators.
[0019]
  Norbornene monomer
  The norbornene-based monomer that can be used in the present invention may be any as long as it has a norbornene ring, but since a molded article having excellent heat resistance can be obtained, a tricyclic or higher polycyclic norbornene-based monomer should be used. Is preferred.
[0020]
  Specific examples of the norbornene-based monomer include, for example, bicyclic compounds such as norbornene and norbornadiene; tricyclic compounds such as dicyclopentadiene (cyclopentadiene dimer) and dihydrodicyclopentadiene; and tetracyclic compounds such as tetracyclododecene. A pentacycle such as cyclopentadiene trimer; a heptacycle such as cyclopentadiene tetramer; an alkyl such as methyl, ethyl, propyl and butyl, an alkenyl such as vinyl, an alkylidene such as ethylidene, a phenyl, a tolyl, Substituents such as aryl such as naphthyl; and further substituents having polar groups such as ester groups, ether groups, cyano groups, and halogen atoms.
[0021]
  One or more of these monomers may be used in combination. Tricyclic, tetracyclic, or pentacyclic monomers are preferred because they are easily available, have excellent reactivity, and are excellent in heat resistance of the resulting resin molding.
[0022]
  Further, the ring-opening polymer to be produced is preferably a thermosetting type. For that purpose, among the norbornene monomers, a crosslinkable monomer having two or more reactive double bonds such as cyclopentadiene trimer is used. Those containing at least are used. The proportion of the crosslinkable monomer in all norbornene monomers is preferably 2 to 30% by weight.
[0023]
  In addition, monocyclic cycloolefins such as cyclobutene, cyclopentene, cyclopentadiene, cyclooctene, and cyclododecene, which can be ring-opening copolymerized with a norbornene-based monomer, may be used as a comonomer as long as the object of the present invention is not impaired.
[0024]
  In order to bulk polymerize these norbornene monomers by reaction injection molding, a metathesis catalyst and an activator described later are usually used.
[0025]
  Metathesis catalyst
  The metathesis catalyst that can be used in reaction injection molding using a norbornene-based monomer is not particularly limited as long as it can ring-open polymerization the norbornene-based monomer by the RIM method, and may be a known one. For example, halides such as tungsten or molybdenum, oxyhalides, oxides, ammonium salts, heteropolyacids (P⁵⁺, As⁵⁺, Si⁴⁺, Ge⁴⁺, Ce⁴⁺, Th⁴⁺, Mn⁴⁺, Ni⁴⁺, Te⁶⁺, I⁷⁺, Co³⁺, Al³⁺, Cr³⁺, Cu²⁺A compound of a heteroatom such as tungsten or molybdenum). In the present invention, a molybdenum-based metathesis catalyst such as organic molybdic acid such as tridodecylammonium molybdate and tri (tridecyl) ammonium molybdate and molybdate organic ammonium salt such as ammonium acid is preferably used.
[0026]
  The amount of the metathesis catalyst used is usually 0.01 mmol or more, preferably 0.1 mmol or more and 50 mmol or less, preferably 20 mmol or less with respect to 1 mol of the monomer used in the whole reaction solution. If the amount of metathesis catalyst used is too small, the polymerization activity is too low and the reaction takes a long time, resulting in poor production efficiency.If the amount used is too large, the reaction is too intense and hardens before being fully filled in the mold. In other words, the catalyst is likely to precipitate, and it is difficult to store it homogeneously.
[0027]
  The metathesis catalyst is usually used after being dissolved in a monomer, but if it is in a range that does not substantially impair the properties of the molded article by the RIM method, it is suspended in a small amount of solvent and then mixed with the monomer. Therefore, it may be difficult to precipitate, or the solubility may be increased.
[0028]
  Activator
  As activators (cocatalysts), JP-A-58-127,728, JP-A-4-226,124, JP-A-58-129,013, JP-A-4-145,247 are disclosed. In the present invention, for example, an alkylaluminum halide such as ethylaluminum dichloride and diethylaluminum chloride, and an organoaluminum compound such as alkoxyalkylaluminum halide can be used. Preferably used.
[0029]
  The amount of the activator used is not particularly limited, but is usually 0.1 mol or more, preferably 1 mol or more, and 100 mol or less, preferably 10 mol or less with respect to 1 mol of the metathesis catalyst used in the whole reaction solution. It is. If the activator is not used or if the amount of the activator used is too small, the polymerization activity is too low and the reaction takes time, resulting in poor production efficiency. Conversely, if the amount used is too large, the reaction is so intense that it may harden before it is fully filled into the mold.
[0030]
  The activator is used after being dissolved in the monomer. However, as long as it does not substantially impair the properties of the molded article by the RIM method, the activator is suspended in a small amount of solvent and then mixed with the monomer. It may be difficult to use or may be used with increased solubility.
[0031]
  Other optional ingredients
  If desired, various additives such as reinforcing materials, antioxidants, fillers, elastomers, pigments, colorants, foaming agents, flame retardants, sliding imparting agents, dicyclopentadiene-based thermal polymerization resins and hydrogenated products thereof, It can be blended into the reaction stock solution, thereby modifying the properties of the resulting RIM product.
[0032]
  In particular, for the purpose of obtaining a molded article having high mechanical strength, a reinforcing material (molded article) is prepared by placing a reinforcing material in the mold in advance and then injecting a polymerization reaction liquid into the mold and polymerizing and curing. ) Can be manufactured.
[0033]
  Examples of the “reinforcing material” include glass fiber, aramid fiber, carbon fiber, ultrahigh molecular weight polyethylene fiber, metal fiber, polypropylene fiber, aluminum coated glass fiber, cotton, acrylic fiber, boron fiber, silicon carbide fiber, alumina fiber, etc. Can be mentioned. These reinforcing materials can be used in various shapes such as those obtained by matting a long fiber or chopped strand, those woven into a cloth, and those having a chopped shape. These reinforcing materials are preferably treated with a coupling agent such as a silane coupling agent in order to improve the adhesion to the resin. The blending amount of the reinforcing material is not particularly limited, but is usually 10% by weight or more, preferably 20 to 60% by weight, with the total monomer weight being 100% by weight. If the filling amount is small, the ratio of the mechanical strength is small, and if the filling amount is too large, there is a tendency for unevenness to occur without uniform filling or filling inhibition. By blending the reinforcing material in the above range, the mechanical strength of the molded body can be improved.
[0034]
  In addition, for the purpose of further improving the mechanical strength of the molded body, a metal rod or a metal plate or the like is previously inserted into a mold for reaction injection molding, and then reaction injection molding is performed (insert molding). it can. By this insert molding, it is possible to obtain a molded body excellent in mechanical strength, in which a metal bar or a metal plate is integrally molded.
[0035]
  As the “antioxidant”, there are various antioxidants for plastics and rubbers such as phenol, phosphorus and amine. “Fillers” include inorganic fillers such as milled glass, carbon black, talc, calcium carbonate, aluminum hydroxide, mica, potassium titanate, and calcium sulfate. “Elastomer” includes natural rubber, polybutadiene, polyisoprene, styrene-butadiene copolymer (SBR), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), Examples include ethylene-propylene-diene terpolymer (EPDM), ethylene vinyl acetate copolymer (EVA), and hydrides thereof. The amount of the elastomer added is appropriately selected so that the viscosity of the reaction stock solution at 30 ° C. is 5 cps or more, preferably 50 cps or more and 1,000 cps or less, preferably 500 cps or less.
[0036]
  The various additives as described above are usually mixed in advance with either or both of the reaction stock solutions.
[0037]
  As a preparation for reaction injection molding, a reaction injection molding material mainly composed of a norbornene monomer, a metathesis catalyst and an activator, a liquid comprising a norbornene monomer and a metathesis catalyst, the norbornene monomer and the activator, and It is preferable to divide the liquid into two stable liquids and put them in separate reaction stock solution supply means.
[0038]
  The mold is preferably sealed with an inert gas, and the components used for the polymerization reaction are preferably stored and operated in an inert gas atmosphere such as nitrogen gas. The mold clamping pressure is usually 0-100 kgf / cm²Range. The polymerization time may be appropriately selected, but is usually 30 seconds to 20 minutes after the completion of the injection of the reaction stock solution.
[0039]
  Reaction activity regulator
  The reaction activity regulator that can be used in the present invention is determined according to the type of reaction stock solution, and is not particularly limited. However, when a norbornene system is used as the reaction stock solution, for example, JP-A-3-146 There are regulators disclosed in Japanese Patent No. 516 and JP-A-4-337318. JP-A-3-146,516 discloses 5-vinylbicyclo [2.2.1] hept-2-ene (vinylnorbornene), 5-isopropenylbicyclo [2.2.1] as a reaction regulator. A method for producing norbornene-based polymers using 5-alkenyl-2-norbornenes such as hept-2-ene is described, and JP-A-4-337,318 discloses 5- It has been shown to use 5-alkynyl-2-norbornenes such as ethynyl-2-norbornene.
[0040]
  In addition, as the reaction activity regulator, a compound having an action of reducing a metathesis catalyst which is a main catalyst of a reaction stock solution containing a norbornene-based monomer as a main component can be used. And alcohols, haloalcohols, esters, ethers, nitriles and the like. Among these, specific examples of alcohols include n-propanol, n-butanol, n-hexanol, 2-butanol, isobutyl alcohol, isopropyl alcohol, t-butyl alcohol and the like. Specific examples of haloalcohols Examples include 1,3-dichloro-2-propanol, 2-chloroethanol, 1-chlorobutanol and the like.
[0041]
  The component concentration when using such a reaction activity regulator is not particularly limited and is appropriately determined according to the type of reaction stock solution and the type of reaction activity regulator used. For example, when haloalcohols are used, the haloalcohols are used. The concentration can be adjusted to, for example, 0.5 to 20% by weight.
[0042]
  Furthermore, in the present invention, the reaction activity regulator is not limited to one that lowers the reaction activity as described above, but may be a main catalyst or a cocatalyst itself that can increase the reaction activity.
[0043]
  The liquid containing the reaction activity regulator may contain the same monomer as that contained in the reaction stock solution. The reaction activity regulator is usually used by adding to the monomer itself or a monomer in which an elastomer is dissolved.
[0044]
  The supply amount of such reaction activity regulator is determined according to the size and shape of the mold cavity. When a norbornene system is used as the reaction stock solution, the reaction proceeds rapidly from the start of the injection of the reaction stock solution into the mold cavity, and the time t ′ (white smoke rises slightly from the surface of the product resin) The SMT) and the filling time t from the start of injection to the completion of filling are preferably determined according to the size of the molded body. The SMT time t 'is necessarily larger than the filling time t, preferably 10 to 300 seconds, and the filling time t at that time is preferably about 1 to 50 seconds. The SMT time t 'is more preferably 20 to 200 seconds, and the filling time t at that time is more preferably about 5 to 35 seconds. Although t '/ t depends on the temperature, it is preferably about 1.5 to 20.
[0045]
  In order to be within such a range, a reaction activity regulator is supplied in a predetermined amount separately from the reaction stock solution for each mold. The number of tanks for supplying the reaction activity regulator is not limited to one, and a plurality of tanks may be used, and different types of reaction activity regulators may be contained in the plurality of tanks.
[0046]
  In the present invention, the reaction stock solution supplied from the reaction stock solution supply means may also contain a reaction activity regulator as described above.
[0047]
  Mold
  The material of the mold used in the present invention is not particularly limited, and is not limited to metals such as cast iron, iron, stainless steel, aluminum, and nickel electroformed, but may be synthetic resin or other materials. Reaction injection molding as one embodiment of reactive polymerization molding can be performed at a relatively low pressure, and it is not always necessary to use a highly rigid mold. In the present invention, even when a relatively large molded body such as a septic tank body is molded as the molded body, it is not always necessary to use a highly rigid mold. It is relatively easy.
[0048]
  As the mold, a rotatable mold can also be used. In that case, it can also be set as the structure which can apply an acceleration with respect to the reaction stock solution inside a metal mold | die after putting a reaction stock solution in the inside of a metal mold | die.
[0049]
[Action]
  In the method and apparatus according to the present invention, when the reaction stock solution is supplied from two or more reaction stock solution supply means into the mold, the reaction activity control agent is supplied from the reaction activity control agent supply means into the mold. The supply amount can be individually controlled by controlling the driving of the pump and opening / closing the valve according to the size and shape of the cavity of the mold. For this reason, it becomes unnecessary to prepare reaction stock solutions having different activities for each size and shape of the cavity of the mold, and to adjust the reaction activity in the reaction stock solution tank. Therefore, in the method and apparatus according to the present invention, it is possible to share the reaction stock solution over a wide range regardless of the size and shape of the mold cavity.
[0050]
  Further, in the present invention, the supply amount (supply speed) of the reaction activity regulator per unit time is changed in at least two or more stages from the start to the end of supply into the mold cavity. This reduces the possibility that an uncured portion is generated near the gate opening of the mold at the end of injection, leading to a shortening of the curing time, and thus improving the productivity of the molded body. Further, by using a reaction retarding agent as a reaction activity regulator and making the supply amount at the end of injection less than the supply amount at the initial stage of injection, in addition to the above-described effects, It is economical because the amount used can be reduced.
[0051]
  Further, the method and apparatus according to the present invention can be suitably used for so-called multi-die molding as well as molding using a single mold.
[0052]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described with reference to the drawings.And reference examplesBased on
  First reference exampleThen, using a multi-mold system, the supply amount (supply speed) of the reaction activity regulator per unit time is changed from the start of supply into the mold cavity until the end of supply.Reference example made constant from beginning to endWill be explained.
  First embodimentThen, using a single mold system, the supply amount (feed rate) of the reaction activity regulator per unit time is at least two stages from the start of supply into the mold cavity until the end of supply. An example in which changes are made separately will be described.
[0053]
  First reference example
  FIG. 1 shows the first aspect of the present invention.Reference exampleIt is a schematic block diagram of the shaping | molding apparatus which concerns on this. Book 1Reference exampleThe molding apparatus 20 shown in FIG.Reference exampleThe apparatus for performing the reaction injection molding of the multi-mold system using the method according to the above, for example, for molding the upper tank and / or the lower tank of the septic tank.
  Molding equipment
  First, referring to FIG.Reference exampleThe reactive polymerization “molding apparatus” of the multi-mold system according to the present invention will be described.
  BookReference exampleThe apparatus 20 according to the invention has at least two molds 22 and 24. These molds 22 and 24 are formed with different cavities for molding molded bodies of different shapes and sizes, such as the upper and lower tanks of the septic tank or the tanks of septic tanks of different capacities. It is. Mixing heads 26 and 28 as mixing means are mounted on the molds 22 and 24, respectively. The mixing heads 26 and 28 are connected to piping systems from the first reaction stock solution tank 30, the second reaction stock solution tank 32, and the reaction activity regulator tank 34.
[0054]
  BookReference exampleThe apparatus 20 according to the present invention has at least two reaction stock solution tanks 30 and 32, and one first reaction stock solution tank 30 stores reaction solution A, which will be described later, and the other second reaction stock solution tank. 32 stores a solution B which is a reaction stock solution described later. The reaction activity regulator tank 34 stores a liquid containing a reaction activity regulator for controlling the reaction activity of these reaction stock solutions.
[0055]
  A first main piping system 36 is connected to the first reaction stock solution tank 30, a second main piping system 38 is connected to the second reaction stock solution tank 32, and the reaction activity regulator tank 34 is connected to the first reaction stock solution tank 30. The third main piping system 40 is connected. These main piping systems 36, 38, 40 are equipped with pumps 42, 44, 46 as liquid feeding means, respectively, so that the liquid in these tanks can be sent to the molds 22 and 24, respectively. ing.
[0056]
  Branch pipes 48, 50, 56, 58, 64, 66 are connected to the pump downstream side of these main pipes 36, 38, 40. The branch pipes 48 and 50 are pipes for sending the reaction stock solution in the first main pipe 36 to the mixing heads 26 and 28, respectively. The branch pipes 56 and 58 are pipes for sending the reaction stock solution in the second main pipe 38 to the mixing heads 26 and 28, respectively. The branch pipes 64 and 66 are pipes for sending the reaction activity regulator-containing liquid in the third main pipe 40 to the mixing heads 26 and 28, respectively. Control valves 52, 54, 60, 62, 68, and 70 are mounted on the branch pipes 48, 50, 56, 58, 64, and 66, respectively, so that the opening and closing of the flow path and / or the flow rate can be controlled. ing.
[0057]
  BookReference exampleThen, temperature sensors 72 and 74 are attached to the mixing heads 26 and 28, respectively, so that the temperature of the reaction stock solution mixed by the mixing heads and injected into the cavities of the molds 22 and 24 can be detected. It has become. The temperature output signals detected by the temperature sensors 72 and 74 are input to the control device 80 as control means.
[0058]
  In the control device 80, the input information (the type of reaction stock solution, the type of reaction activity regulator, the size and shape of the cavities of the molds 22 and 24, the outside air temperature, etc.) and the temperature information from the temperature sensors 72 and 74 are displayed. Based on this, the pumps 42, 44, 46 and the control valves 52, 54, 60, 62, 68, 70 are controlled.
[0059]
  Specifically, the control device 80 controls the pumps 42 and 44 and the control valves 52, 54, 60, and 62 to control the pressure of the reaction stock solution sent to the mixing head through the control valves 52, 54, 60, and 62. The flow rate is controlled for each mold 22 and 24. In addition, the control device 80 controls the pump 46 and the control valves 68 and 70 to control the pressure and flow rate of the reaction activity regulator-containing liquid sent to the mixing head through the control valves 68 and 70. Control is performed every 24 hours.
[0060]
  Further, based on the output signals from the temperature sensors 72 and 74, the controller 80 sends the liquid sent from the reaction activity regulator tank 34 to each mixing head 26 and 28 when the temperature of the reaction stock solution is higher than a predetermined value. The pump 46 and the control valves 68 and 70 are controlled so as to correct the flow rate in comparison with the flow rate set for each mold 22 and 24. For example, when the reaction activity regulator stored in the reaction activity regulator tank 34 is a reaction activity regulator for increasing the reaction activity and the temperature of the reaction stock solution is higher than a predetermined value, the mixing head 26 is used. And the flow rate of the liquid sent to 28 is controlled to become smaller than the set value. In the case where the reaction activity regulator stored in the reaction activity regulator tank 34 is a reaction activity regulator for reducing the reaction activity, and the temperature of the reaction stock solution is higher than a predetermined value, the mixing head The flow rate of the liquid sent to 26 and 28 is controlled to be larger than the set value. These flow rate controls are performed for each of the molds 22 and 24. The control valves 52, 54, 60, 62, 68 and 70 are preferably driven by electric signals and can control the flow rate.
[0061]
  BookReference exampleIn order to perform reaction injection molding, a reaction stock solution containing a norbornene-based monomer is used.
[0062]
  As a preparation for reaction injection molding, a reaction injection molding material mainly composed of a norbornene monomer, a metathesis catalyst and an aluminum activator, a liquid B composed of a norbornene monomer and a metathesis catalyst, and the norbornene monomer Divide into two stable liquids consisting of an aluminum-based activator and liquid A and put them in separate tanks.
[0063]
  BookReference exampleThen, the A liquid is stored in the first reaction stock solution tank 30, and the B liquid is stored in the second reaction stock solution tank 32. The temperature of the reaction stock solution composed of the A solution or the B solution is 10 to 60 ° C., and the viscosity of the reaction stock solution is, for example, about 5 cps to 3,000 cps, preferably about 100 cps to 1,000 cps at 30 ° C.
[0064]
  BookReference exampleIn the case where other optional components such as carbon black are contained in the reaction stock solution, an auxiliary tank is provided in the first reaction stock solution tank 30 containing the A solution or the second reaction stock solution tank 32 containing the B solution, It is preferable to store a liquid containing an arbitrary component inside and mix it with the reaction stock solution stored inside these tanks if necessary and supply it to the mold. Even when the molds 22 and 24 are exchanged to form RIM molded bodies having different compositions by making the component composition of the reaction stock solution stored in the reaction stock solution tanks 30 and 32 constant, the tanks 30 and 32 are used. It is not necessary to change the composition of the reaction stock solution stored in the inside.
[0065]
  The supply amount of the reaction activity regulator is determined according to the size and shape of the mold cavity, and is supplied in a predetermined amount separately from the reaction stock solution for each mold.
[0066]
  BookReference exampleThen, the supply amount (supply speed) of the reaction activity regulator per unit time is determined for each mold 22 and 24 from the start of supply into the cavity of each mold 22 and 24 to the end of supply.Constant from start to finishIt can be controlled in accordance with the size and shape of the molded body to be molded.
[0067]
  BookReference exampleThe number of tanks 34 for supplying the reaction activity regulator is one, but a plurality of tanks 34 may be used, and different types of reaction activity regulators may be contained in the plurality of tanks.
[0068]
  In the reaction activity regulator tank 34, it is preferable that the viscosity of the liquid containing the reaction activity regulator (also referred to as “C solution”) is substantially equal to the viscosity of the reaction stock solution in the reaction stock solution tanks 30 and 32. The liquid containing the reaction activity modifier is mixed with the reaction stock solution before being injected into the cavities of the molds 22 and 24. In addition, the liquid containing the reaction activity regulator may contain the same monomer as that contained in the reaction stock solution. In order to prevent mixing failure and nozzle clogging, an elastomer may be added to the liquid C. Specific examples of the elastomer are the same as those that can be added to the reaction stock solution described above.
[0069]
  BookReference exampleIn this case, even if the dies 22 and 24 are replaced with other dies, the composition of the reaction activity regulator-containing liquid stored in the reaction activity regulator tank 34 is preferably constant. It is preferable that the liquid is always stored in 34 and the piping system 40. This is because the control of the reaction activity can be realized by controlling the pump 46 and the control valves 68 and 70 by the control device 80 and changing the supply flow rate for each mold 22 and 24. In addition, by always storing the liquid in the tank 34 and the piping system 40, clogging in the tank and the piping system can be prevented.
[0070]
  Also, in order to inject the reaction activity regulator into the mixing heads 26 and 28, the control valves 68 and 70 are opened, but when not injecting, the piping systems 40 and 64 (until before the control valve 68), 66 It is preferable to apply a back pressure of a predetermined pressure to the reaction activity regulator-containing liquid stored therein (until before the control valve 70). For example, in the piping system 40, 64, 66, 20 kgf / cm.²The degree is preferred. Furthermore, it is preferable to keep the control valves 68 and 70 of the reaction activity regulator tank 34 “open” for several seconds before and after the injection of the liquid A and the liquid B into the mixing heads 26 and 28. By applying a back pressure of a predetermined pressure, or by opening the control valves 68 and 70 of the reaction activity regulator tank 34 for several seconds before and after the injection of the liquid A and the liquid B, in particular, the piping systems 64 and 66 It is possible to prevent clogging of an injection nozzle (not shown) that can supply liquid into the mixing heads 26 and 28 provided at the tip.
[0071]
  BookReference example, The pipes 48 and 50 through which the liquid A is injected into the mixing heads 26 and 28, the pipes 56 and 58 through which the liquid B is injected into the mixing heads 26 and 28, and the liquid C are injected into the mixing heads 26 and 28. The nozzle diameters of the pipes 64 and 66 are, for example, 4 to 7 mm for the nozzle diameters of the A liquid pipes 48 and 50 and the B liquid pipes 56 and 58, respectively. The nozzle diameters of 64 and 66 are in the range of 0.8 to 1.4 mm. That is, bookReference exampleTherefore, the nozzle diameters of the C liquid pipes 64 and 66 are optimized. By optimizing in this way, a predetermined back pressure is applied to the pipes 64 and 66 even if the injection amount of the liquid C into the mixing heads 26 and 28 is small, and therefore nozzle clogging can be prevented.
[0072]
  BookReference exampleIn the reaction stock solution tanks 30 and 32, the reaction stock solution stored in the reaction stock solution tanks 30 and 32 may contain the reaction activity regulator as described above.
[0073]
  Molding method
  Next, a reaction injection “molding method” for molding, for example, the upper tank and / or the lower tank of the septic tank using the molding apparatus 20 will be described.
  In reaction injection molding, if necessary, a reinforcing material is previously installed in the molds 22 and 24, and a reinforced polymer (molded body) is manufactured by supplying a reaction liquid therein and polymerizing. You can also. Alternatively, a metal material or the like may be installed in the mold in advance and insert molded.
[0074]
  To start reaction injection molding, based on a control signal from the control device 80, the control valves 52, 54, 60, 62 are opened, the pumps 42, 44 are driven, and the reaction stock solution is mixed from the tanks 30, 32 with the mixing head 26. , 28 at a flow rate and / or injection time calculated for each mold 22, 24. At the same time, based on the control signal from the control device 80, the control valves 68 and 70 are opened, the pump 46 is driven, and the reaction activity regulator-containing liquid is supplied from the tank 34 to the mixing heads 26 and 28. Supply at a calculated flow rate and / or injection time. The flow rate and / or injection time calculated for each mold 22, 24 may be different or the same for each mold.
[0075]
  In each mixing head 26 and 28, the liquids A and B from the tanks 30 and 32 and the liquid containing the reaction activity regulator from the tank 34 are mixed and mixed at a mixing ratio suitable for each mold. The liquid is filled in the cavities of the molds 22 and 24 as a reaction stock solution. The reaction stock solution filled in the cavite spreads inside the cavity. The temperature of the reaction stock solution immediately before being filled into the mold cavity is controlled to a constant temperature by a heat exchange jacket mounted on the mixing heads 26 and 28. The temperature is usually in the range of 15 to 25 ° C regardless of the season.
[0076]
  The polymerization time varies depending on the molds 22 and 24, and may be selected as appropriate, but is usually about 20 seconds to 20 minutes after the injection of the reaction stock solution. The mold clamping pressure is usually 0-100 kgf / cm²It is. The injection pressure of the reaction stock solution (A solution and B solution) is, for example, 50 to 100 kgf / cm.²In this case, the injection pressure of the reaction activity regulator-containing liquid (C liquid) is 10 to 95 kgf / cm.²It is preferable that If the injection pressure is too low, transfer of the transfer surface formed on the inner peripheral surface of the mold cavity tends not to be performed well. If it is too high, the rigidity of the mold must be increased. Not economical. In addition, if the difference between the pressures of the liquid A and the liquid B and the pressure of the liquid C is too large, the liquid A, the liquid B, and the liquid C are not uniformly mixed, resulting in variation in activity.
[0077]
  In reaction injection molding, the reaction proceeds abruptly from the start of injection of the reaction stock solution into the mold cavity, and the time until the white smoke slightly rises from the surface of the produced resin (SMT) t ′ and the injection start It is preferable that the filling time t from filling to filling is determined according to the size of the molded body. The SMT time t 'is necessarily larger than the filling time t, preferably 10 to 300 seconds, and the filling time t at that time is preferably about 1 to 50 seconds. The SMT time t 'is more preferably 20 to 200 seconds, and the filling time t at that time is more preferably about 5 to 35 seconds. Although t '/ t depends on the temperature, it is preferably about 1.5 to 20.
[0078]
  BookReference exampleThen, the size of the cavity of each mold 22 and 24 is controlled by controlling the supply amount of the reaction activity regulator supplied from the tank 34 to the mixing heads 26 and 28 for each mold 22 and 24 for each mold. The gel time ratio can be made constant regardless of the sheath shape and the outside air temperature. Therefore, there is no need to prepare reaction stock solutions having different activities for each cavity 22 or 24 in size or shape, or to adjust the reaction activity in the reaction stock solution tanks 30 and 32. In addition, even when the molds 22 and 24 are exchanged and a mold for molding a different molded body is mounted, reaction stock solutions having different activities are prepared, and reaction activities are adjusted in the reaction stock solution tanks 30 and 32. The work to do becomes unnecessary. Even when the mold is replaced, the piping size of the main piping systems 36, 38, 40 and branch piping 48, 50, 56, 58, 64, 66, the nozzle diameter at the mixing heads 26 and 28, etc. are changed. There is no need.
[0079]
  So thisReference exampleIn the method and apparatus according to the above, the reaction stock solution can be shared in a wide range regardless of the size and shape of the mold cavity. BookReference exampleThe method and apparatus according to the present invention can be suitably used for multi-die molding as shown in the illustrated example. BookReference exampleThenMulti mold systemHowever, the present invention is not limited to this and will be described later.First embodimentIt is not excluded to apply to a single mold system used in
[0080]
  Like the aboveReference exampleUsing the method and apparatus according to the present invention, the upper tank and / or the lower tank of the septic tank are formed. The upper tank and the lower tank thus obtained are joined by, for example, a flange or the like to form a tank body of the septic tank. In the upper tank of the tank of the septic tank, for example, an inlet and a discharge outlet are formed, and the sewage flowing from the inlet is an anaerobic treatment chamber (or tank; the same applies hereinafter) formed by a plurality of partition plates inside the septic tank. ), Processed in a processing chamber such as an aerobic processing chamber, a sedimentation chamber, or a disinfection chamber, and discharged from the outlet. In the upper part of the upper tank, for example, three manholes are formed along the longitudinal direction of the tank.
[0081]
  First embodiment
  FIG. 2 illustrates the present invention.First embodimentIt is a schematic block diagram of the shaping | molding apparatus which concerns on this. The molding apparatus 20a shown in FIG. 2 is an apparatus for performing reaction injection molding of a single mold system by using the method according to the present invention, and therefore the above-mentioned first that employs a multi-mold system.Reference exampleIs different. 2, members that are the same as those in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted.
[0082]
  In this embodiment, the supply amount (supply speed) of the reaction activity regulator per unit time is divided into at least two stages in the middle from the start of supply into the cavity of the mold 22 to the end of supply. It is designed to change. Specifically, for example, when a reaction retarding agent that lowers the reaction activity is used as the reaction activity regulator, it is preferable to reduce the supply amount at the end of the injection from the supply amount at the beginning of the injection, and the reaction activity as the reaction activity regulator. In the case of using a reaction accelerator that enhances, it is preferable to increase the supply amount at the end of injection more than the supply amount at the beginning of injection.
[0083]
  When the supply amount per unit time into the cavity is constant from the beginning of injection to the end of injection, the curing reaction of the reaction stock solution may not proceed easily near the mold gate at the end of injection, and the reaction used in this case By changing the supply amount of the reaction activity regulator per unit time according to the type of the activity regulator, there is less risk of uncured parts occurring near the gate opening of the mold at the end of injection, and the curing time is reduced. This leads to shortening, and as a result, the productivity of the molded body is improved. In addition, by using a reaction retarding agent as a reaction activity regulator and making the supply amount at the end of injection less than the supply amount at the beginning of injection, the curing time can be shortened, and the reaction activity used than when supplying a constant amount throughout. It is economical because the amount of regulator used can be reduced.
[0084]
  As a method of changing the supply rate in at least two or more stages, for example, when a reaction retarder is used as a reaction activity regulator, (i) supply at a predetermined supply rate from the start of injection to a predetermined time. Then, reduce the supply rate to a constant rate and supply for a predetermined time, etc., while supplying the supply rate while decreasing the supply rate in at least two stages or more. (Ii) Decrease the supply rate gradually from the start of injection to the completion of injection. (Iii) A method of supplying at a constant supply rate for a predetermined time from the start of injection and then gradually decreasing the supply rate.
  Further, in the case of using a reaction accelerator as a reaction activity regulator, (iv) supply at a predetermined supply rate from the start of injection until a predetermined time, and then increase the supply rate to a constant rate and supply for a predetermined time. Supply while increasing the supply rate in at least two stages, (v) gradually increase the supply rate from the start of injection to completion of injection, (vi) at a constant supply rate for a predetermined time from the start of injection Examples include a method of supplying and then gradually increasing the supply speed.
[0085]
  BookFirstIn the embodiment, the method and apparatus according to the present invention are described by applying to a single mold system.Reference exampleIt is not excluded to apply to the multi-mold system used in the above.
[0086]
  Note that the present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention. For example, in the above-described embodiment, RIM molding is exemplified as an example of the reactive polymerization molding method, and the tank body of the septic tank is molded by RIM molding. However, the present invention is not limited to normal RIM molding, but a reaction stock solution is used. It can be applied to the case of forming a tank body of a septic tank and other molded bodies by rotational molding (including centrifugal molding).
[0087]
【Example】
  Hereinafter, the present invention will be described based on further detailed examples, but the present invention is not limited to these examples. In the examples shown below, parts or percentages are by weight unless otherwise stated.
[0088]
  Example 1
  In the combined septic tank composed of an upper tank and a lower tank, in the mold 22 shown in FIG. 1, 6 people are used to form a lower tank (for 6-person tank and 10-person tank) having different capacities. The mold for forming the lower tank of the tank was used, and in the mold 24, the reaction injection molding was performed using the mold for forming the lower tank of the 10-person tank.
[0089]
  In the reaction injection molding, a norbornene-based monomer mixture composed of 90% dicyclopentadiene (DCP) and 10% asymmetric cyclopentadiene trimer is put in two tanks, one of which is diethylaluminum with respect to the monomer mixture. Chloride (DEAC) was added to a concentration of 40 mmol and 1,3-dichloro-2-propanol (dcPrOH) to 40 mmol (solution A). On the other hand, tri (tridecyl) ammonium molybdate was added to the monomer mixture to a concentration of 10 mmol (solution B). SMT of these A liquid and B liquid alone was 90 seconds.
[0090]
  The A solution and the B solution thus prepared were stored in the first reaction stock solution tank 30 and the second reaction stock solution tank 32 shown in FIG. 1, respectively.
[0091]
  Separately from these A liquid and B liquid, the C liquid as a reaction activity regulator containing liquid stored in the reaction activity regulator tank 34 was prepared. As C liquid, what mix | blended 15 parts vinyl norbornene (retarding agent) and 8.7 parts dcPrOH with respect to 100 parts of said monomer mixtures was prepared. This C liquid was stored in the reaction activity regulator tank 34 shown in FIG.
[0092]
  For the mold 22, the liquid A and the liquid B from the tanks 30 and 32 are respectively injected at a pressure of 7 × 10⁶Pa (about 71 kgf / cm²) And an injection flow rate of 2650 g / sec through the mixing head 26 into the mold cavity. At the same time, liquid C is supplied from the tank 34 to an injection pressure of 4 × 10.⁶Pa (about 41 kgf / cm²) And a constant flow rate of 30 g / sec. And injected through the mixing head 26 into the mold cavity. These filling times t were 16.5 seconds. The SMT time t 'was 20 seconds. In addition, the total usage-amount of C liquid was 495g with respect to the total usage-amount 43,725g of A liquid and B liquid.
[0093]
  For the mold 24, the liquid A and the liquid B are supplied from the tanks 30 and 32, respectively.⁶Pa (about 61 kgf / cm²) And an injection flow rate of 2,800 g / sec through the mixing head 28 and into the mold cavity. At the same time, liquid C is supplied from the tank 34 to an injection pressure of 5.5 × 10.⁶Pa (approximately 56 kgf / cm²) And a flow rate of 45 g / sec ± 5 g / sec. And injected through the mixing head 28 into the mold cavity. These filling times t were 28 seconds. The SMT time t 'was 35 seconds. In addition, the total usage-amount of C liquid was 1,260g with respect to the total usage-amount of A liquid and B liquid 78,400g.
[0094]
  The molded bodies were taken out from the molds 22 and 24 and evaluated for void defects, unfilled defects, needle defects and double layer defects in the molded bodies, but none of these defects were found.
[0095]
  The void defect means that a void or the like is present in the molded body, and the unfilled defect is that the molded body has a molding defect due to unfilled stock solution. In addition, fine needle-like bubbles are seen in the molded body, and the two-layer failure is a state in which a two-layer surface is seen such that the core mold surface of the molded body is covered with a single resin skin. is there.
[0096]
  Example 2
  In order to mold the lower tank of the combined septic tank for eight-person tank, reaction injection molding was performed using the molding apparatus shown in FIG. In the same manner as in Example 1, liquid A, liquid B and liquid C were prepared, and liquid A and liquid B were added to the first reaction stock solution tank 30 and the second reaction stock solution tank 32 shown in FIG. Was stored in the reaction activity regulator tank 34. Then, the liquid A and the liquid B from the tanks 30 and 32 are injected into the mold 22 through the mixing head 26 and into the mold cavity, respectively.⁶Pa (about 71 kgf / cm²) And an injection flow rate of 2,800 g / second for 24 seconds. At the same time, the liquid C from the tank 34 passes through the mixing head 26 into the mold cavity and has an injection pressure of 4 × 10.⁶Pa (about 41 kgf / cm²) And an injection flow rate of 45 g / second, and then injected for 21 seconds. Thereafter, the injection flow rate was changed to a flow rate of 25 g / second and injected for 3 seconds. The SMT time t 'was 30 seconds. Moreover, the curing time was 70 seconds, which was superior to Examples 1-2. In addition, the total usage-amount of C liquid was 1,020g with respect to the total usage-amount 67,200g of A liquid and B liquid.
  The molded body was taken out from the mold 22 and evaluated for void defects, unfilled defects, needle-shaped defects, and double-layer defects in the molded body, but none of these defects were found. In particular, no uncured portion was observed near the gate side inlet.
[0097]
  Example 3
  C liquid supplied to the mold 22 is injected at a pressure of 4 × 10.⁶  Pa (about 41 kgf / cm²  ) And an injection flow rate of 45 g / second, and then injected for 14 seconds while gradually decelerating the injection flow rate at a rate of 1.5 g / second, and 24 g / second at the end of the injection, In the same manner as in Example 2, reaction injection molding was performed to form a lower tank of a combined septic tank for 8-person tanks. The SMT time t 'was 27 seconds and the curing time was 60 seconds, which was superior to that of Example 1. In addition, the total usage-amount of C liquid was 933g with respect to the total usage-amount 67,200g of A liquid and B liquid.
  The molded body was taken out from the mold 22 and evaluated for void defects, unfilled defects, needle-shaped defects, and double-layer defects in the molded body, but none of these defects were found. In particular, no uncured portion was observed near the gate side inlet.
[0098]
  Example 4
  C liquid supplied to the mold 22 is injected at a pressure of 4 × 10.⁶  Pa (about 41 kgf / cm²  ) And an injection flow rate of 45 g / second for 25 seconds, and then the injection flow rate is changed to 19 g / second for 3 seconds. The lower tank of the combined septic tank for tanks was molded. The SMT time t 'was 32 seconds. The curing time was 70 seconds, which was superior to Example 1. In addition, the total usage-amount of C liquid was 1,182g with respect to 78,400g of the total usage-amount of A liquid and B liquid. The molded body was taken out from the mold 22 and evaluated for void defects, unfilled defects, needle-shaped defects, and double-layer defects in the molded body, but none of these defects were found. In particular, no uncured portion was observed near the gate side inlet.
[0099]
  Comparative Example 1
  The supply flow rate of the C liquid supplied to the mold 24 is the same as the supply volume of the C liquid supplied to the mold 22, and the injection flow rate of the C liquid is set to a constant flow rate of 45 g / sec. Then, reaction injection molding was performed to obtain a molded body. The molded body was taken out from the molds 22 and 24 and evaluated for void defects, unfilled defects, needle-shaped defects and double-layer defects in the molded body. Neither a defect, a needle defect, or a two-layer defect was found, but the molded product taken out from the mold 24 had a void defect, an unfilled defect, a needle-shaped defect, and an unfilled defect among the two-layer defects. And a double layer failure was found.
[0100]
  Comparative Example 2
  The supply flow rate of the C liquid supplied to the mold 22 is the same as the supply volume of the C liquid supplied to the mold 24, and the injection flow rate of the C liquid is set to a constant flow rate of 45 g / sec. Then, reaction injection molding was performed to obtain a molded body. The molded body was taken out from the molds 22 and 24 and evaluated for void defects, unfilled defects, needle defects and double-layer defects in the molded body. None of the defects, needle defects and double-layer defects were found, but the molded product taken out from the mold 22 had void defects, unfilled defects, needle defects and double-layer defects. A needle defect was found.
[0101]
【The invention's effect】
  As described above, in the method and apparatus according to the present invention, it is possible to share the reaction stock solution in a wide range regardless of the size and shape of the mold cavity. Further, the method and apparatus according to the present invention can be suitably used for so-called multi-die molding as well as molding using a single mold.
[0102]
  In the present invention, the uncured portion is generated near the gate opening of the mold at the end of injection by changing the supply amount (supply speed) of the reaction activity regulator per unit time in at least two stages. This leads to a reduction in the curing time, which leads to a shortening of the curing time, which in turn improves the productivity of the molded body. In particular, by using a reaction retarding agent as a reaction activity regulator and making the supply amount at the end of injection less than the supply amount at the initial stage of injection, in addition to the above-described effects, It is economical because the amount used can be reduced.
[Brief description of the drawings]
FIG. 1 illustrates the present invention.Reference exampleIt is a schematic block diagram of the shaping | molding apparatus which concerns on this.
FIG. 2 is a schematic configuration diagram of a molding apparatus according to the first embodiment of the present invention.
[Explanation of symbols]
  20, 20a ... Molding device
  22, 24 ... Mold
  26, 28 ... mixing head
  30, 32 ... Reaction stock tank
  34 ... Reaction activity regulator tank
  36, 38, 40 ... Main piping system
  42, 44, 46 ... Pump
  48, 50, 56, 58, 64, 66 ... Branch piping
  52, 54, 60, 62, 68, 70 ... Control valve
  72, 74 ... Temperature sensor
  80 ... Control device

Claims (5)

In a reactive polymerization molding method in which a reaction stock solution is supplied into a mold from two or more reaction stock solution supply means, and the reaction stock solution is reacted in the mold for polymerization.
Separately from the reaction stock solution supply means, a reaction activity regulator supply means for supplying a reaction activity regulator for controlling the reaction activity of the reaction stock solution in the mold into the mold is provided,
When the reaction stock solution is supplied into the mold from two or more reaction stock solution supply means, the supply amount per unit time of the reaction activity regulator supplied from the reaction activity regulator supply means into the mold is at least two. A reactive polymerization molding method, wherein the reaction activity regulator is supplied into a mold by changing the steps in the above steps.   The reactivity according to claim 1, wherein the supply amount of the reaction activity regulator supplied from the reaction activity regulator supply means into the mold is controlled in accordance with the size and shape of the molded article to be molded. Polymerization molding method.   The reactive polymerization molding method according to claim 1, wherein the reaction stock solution contains a norbornene-based monomer. At least one mold,
Two or more reaction stock solution supply means for supplying the reaction stock solution to the mold;
A reaction activity regulator supplying means for supplying a reaction activity regulator for controlling the reaction activity of the reaction stock solution in the mold, which is provided separately from the reaction stock solution supply means,
Control means for changing the supply amount per unit time of the reaction activity regulator supplied from the reaction activity regulator supply means into the mold in at least two stages; and
A molding apparatus having: Two or more reaction stock solutions are supplied from the two or more reaction stock solution supply means into two or more molds, respectively.
The molding apparatus according to claim 4, wherein the control unit individually controls a supply amount of the reaction activity regulator supplied from the reaction activity regulator supply unit to each mold.

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