WO2006104149A1

WO2006104149A1 - Process for production of sand molds by injection molding and analysis program therefor

Info

Publication number: WO2006104149A1
Application number: PCT/JP2006/306305
Authority: WO
Inventors: Hiroyasu Makino
Original assignee: Sintokogio, Ltd.
Priority date: 2005-03-28
Filing date: 2006-03-28
Publication date: 2006-10-05
Also published as: JPWO2006104149A1; JP4569629B2

Abstract

A process for the production of molds by injection molding which makes it possible to charge a mold cavity with a binder-containing slurry material stably on the basis of the optimized molding conditions, namely, a process for the production of molds by charging a mold cavity with a binder-containing slurry material by injection and molding the material, which comprises the step of conducting the molding under the conditions on the basis of the judgment of results of injection molding analysis. The injection molding analysis comprises calculating numerically the equation of motion of the slurry material so as to satisfy the equation of continuity and repeating the analysis of the equation of motion for determining the speed distribution of the material after the lapse of minute time and the analysis of temperature distribution for calculating the temperature distribution of the material at the time.

Description

Specification

Sand injection molding method and analysis program

Technical field

TECHNICAL FIELD [0001] The present invention relates to a method for predicting a filling failure of sand mold molding by injection and performing molding with improved filling properties. More specifically, the present invention relates to an injection molding method in which a foamed mixture obtained by stirring particulate aggregate, a water-soluble binder and water is press-fitted into a heated mold cavity to mold a mold. It relates to the analysis program.

Background art

Conventionally, the core system is mainly a shell core or a cold box. Since both core systems are binders developed for pig iron, there is a problem with disintegration, especially in the case of low melting aluminum casting. The shell core is a blow mold in which dry core sand coated with rosin is blown together with compressed air into a heated mold, while the cold box is wet core sand coated with rosin at room temperature. Blow mold into mold, then solidify by gassing. In recent years, protein-based binders and inorganic-based binder core systems have been developed and attracted attention for aluminum objects.

[0003] The present applicants have developed a core system for aluminum products using a binder based on natural polysaccharides (Non-patent Documents 1 and 2). In this binder system, water and a polysaccharide-based binder are added to silica sand, and the mixture is stirred to form a whip containing bubbles, then injection molded into a heated mold, and dried and solidified. Compared to conventional shell cores and cold boxes, the decomposition temperature of the binder is low, so it has excellent disintegration, and since it is a binder based on natural polysaccharides, there is almost no odor. In addition, the conventional core system is blow-molded, whereas the binder system is injection-molded in a whip shape with good fluidity, so the molding process is different and the filling into details is good.

Non-Patent Document 1: Zengo, Kato, Asano, Nagasaka, Japan Society for Engineering Engineering 144th Annual Lecture Meeting Summary (2004) 151 Non-Patent Document 2: Kato, Asano, Yoshitsugu, Nagasaka, Japan Society for Engineering Engineering 144th National Lecture Meeting Summary of Performance (2004) 152 In this core system, even if a conventional mold is used, a binder is used. However, it is difficult to stabilize the quality of the molded product. For this reason, in order to determine the mold design including the mold design such as the mold temperature and the injection speed, it is necessary to grasp the filling phenomenon of the core mold in detail.

[0004] However, if the experiment is repeated while analyzing the core molding phenomenon in order to find out the molding conditions, much time and labor are required. In addition, it is difficult to ensure stable quality only with molding conditions.

[0005] Therefore, in view of the above circumstances, the present invention is a vertical injection capable of stably filling a slurry material containing a binder into a mold cavity based on optimized molding conditions. DISCLOSURE OF THE INVENTION DISCLOSURE OF THE INVENTION Disclosed for the purpose of providing an analysis program for molding method and injection molding analysis method

[0006] In order to solve the above problem, in one aspect of the present invention, a method for predicting a filling failure in a filling space of a sand molding by injection and performing molding with improved filling property is adopted by an injection molding machine. A step of inputting molding data including molding conditions, the shape of the filling space and the physical properties of the sand, into the calculation means; based on the input data regarding the molding before the molding is actually performed A step of calculating the filling property of the sand sand by a sand molding analysis method; a step of repeating the calculation by the sand molding analysis method by changing molding conditions of the injection molding as necessary; and by the injection molding machine A step of operating the injection molding machine under the molding conditions of the injection molding changed so that the actual molding performed is performed based on the calculation result of the filling property of the sand sand by the sand molding analysis method; Including In the sand mold forming analysis method, the equation of motion of the clay sand is numerically calculated so as to satisfy a continuous equation, and a velocity equation analysis step for obtaining the velocity distribution of the clay sand after a minute time, It comprises a temperature distribution analysis process for calculating the temperature distribution of the sand at the time, a step of analyzing the equation of motion, and a step of repeating the temperature distribution analysis step.

[0007] Based on the above aspect, based on the continuum model, the shear rate dependence of viscosity was considered- A mathematical model is constructed as a Eutonian fluid. In addition to identifying the various parameters of this model, we will perform a core-shaped computer simulation. In addition, the validity of the analysis model and parameters is verified by basic molding experiments, and computer simulations of core molding of actual scale are also performed to confirm the effects of various conditions on molding properties in advance, and to prevent defective filling of sand molding. Predicted.

[0008] The injection molding machine used in the above aspect is configured by filling a whip-like foam mixture obtained by stirring particulate aggregate, a water-soluble binder, and water into a heated mold cavity by a press-fitting method. A saddle type can be formed.

[0009] The injection molding machine can be provided with at least one of temperature measuring means for the particulate aggregate or the foamed mixture, viscosity measuring means for the foamed mixture, and moisture measuring means for the foamed mixture.

[0010] In another aspect of the invention, the vertical injection molding method is a vertical injection molding method in which a slurry-like material containing a binder is filled in a filling space inside a mold by injection to perform vertical molding. Based on the judgment of the analysis results of the injection molding analysis method! The method includes a step of performing vertical molding under the molding conditions.

[0011] Also, in one aspect of the present invention, the vertical injection molding method of the present invention is a vertical injection molding method in which vertical molding is performed by filling a slurry-like material containing a binder into a filling space inside a mold by injection. Analyzing the injection molding analysis method based on data related to molding, including molding conditions and physical properties that are the physical properties of the slurry-like material. And a step of determining whether or not the molding condition is to be changed, and a step of performing an actual mold molding executed by the mold injection molding apparatus under the molding condition based on the determination! /

[0012] Further, in one aspect of the present invention, the vertical injection molding method is a vertical injection molding method in which a slurry-like material containing a binder is filled in a filling space inside a mold by injection to perform vertical molding. A process of storing data relating to molding including physical properties that are physical properties of the slurry-like material and molding conditions that are set at the time of molding, and before the actual molding is performed, Of these, a step of temporarily setting parameters necessary for a pre-stored injection molding analysis method, and an injection molding using the temporarily set parameters In order to analyze the mold analysis method and obtain a good analysis result, the calculation by the injection molding analysis method is repeated by changing the molding conditions and determining the parameters, and the actual process executed by the injection molding apparatus. And a step of performing molding under modified molding conditions so as to match the analysis result of the injection molding analysis method using the determined parameters.

[0013] In addition, the program for injection molding according to the present invention is based on the molding conditions set for molding and data relating to molding including physical property values that are physical properties of the slurry-like material. In order to analyze the analysis method, the computer calculates the equation of motion of the slurry material numerically so as to satisfy the continuity equation, and analyzes the equation of motion to obtain the velocity distribution of the slurry material after a minute time And a function of repeating the temperature distribution analysis for calculating the temperature distribution of the slurry-like material at the time.

[0014] The present invention configured as described above makes it possible to clarify the molding process of the Noinder system and optimize the mold design and molding conditions.

[0015] The present invention also performs molding under molding conditions optimized by the injection molding analysis method so as to eliminate the filling failure of the slurry-like material into the filling space by injection. Obtainable.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention is based on the continuum model, and among the parameters necessary for the analysis of the injection-type analysis method mathematically modeled as a Newtonian fluid considering the shear rate dependence of the viscosity, a specific parameter is preliminarily subjected to preliminary experiments. Estimate / identify the force such as the physical property value that is the physical property of the slurry-like material and set it temporarily. Then, based on the temporarily set parameters, molding computer simulation by the injection molding analysis method is performed.

[0017] The parameters are data relating to molding including molding conditions set during molding and physical properties that are physical properties of the slurry-like material, and are data necessary for an injection molding analysis method. In addition, the specific parameters are parameters that particularly contribute to the filling property, such as viscosity, heat transfer coefficient filling property, and packing density. [0018] As the injection molding analysis method, for example, the equation of motion of the slurry-like material is calculated numerically so as to satisfy the continuous equation, and the velocity distribution of the slurry-like material after a minute time is obtained. It is possible to use an analysis method that repeats the above analysis and the temperature distribution analysis for calculating the temperature distribution of the slurry-like material at the time. This injection molding analysis method is stored in advance in a computer.

In the present embodiment, the molding is analyzed by the injection molding analysis method, and the quality of the molding using the temporarily set parameters is determined. If the result of this determination is a negative determination (underfill condition), the molding conditions are changed and the molding is analyzed by the injection molding analysis method. In the case of a good judgment (good filling state), the actual molding performed by the injection molding apparatus is performed under the modified molding conditions so as to match the analysis result of the injection molding analysis method. Yes.

[0020] The molding conditions are conditions executed by the injection molding apparatus. For example, the injection speed of the slurry-like material, the injection pressure, the injection flow rate (determining the shape force of the filling space), the initial temperature of the slurry-like material, Mold temperature, molding completion time (filling time and holding time in the mold after filling).

[0021] Further, the physical property values which are physical properties of the slurry-like material include, for example, viscosity (depending on shear rate and water temperature), moisture, density, specific heat, thermal conductivity, porosity, mold and slurry. Such as heat transfer coefficient between materials.

[0022] The slurry material in the present invention is not particularly limited as long as it can be injected, and examples thereof include a particulate aggregate, a water-soluble binder, and a material obtained by stirring water. . The slurry-like material contains the foamed mixture thus produced and whipped. In the present embodiment, core molding using the slurry-like material will be described.

In the present embodiment, at least one of the temperature measuring means for the particulate aggregate or slurry material, the viscosity measuring means for the slurry material, and the moisture measuring means for the slurry material may be omitted. it can.

Next, an embodiment in which a mathematical model (analysis model) of the injection molding analysis method is used for core molding will be described. First, viscosity and heat transfer as parameters necessary for the analysis method In addition to identifying the coefficients, computer simulation of core molding is performed. The present invention is characterized in that the mold is at a temperature higher than the curing temperature of the binder, and the temperature of the slurry-like material is close to / from the mold temperature.

[0025] In the present embodiment, water and a polysaccharide-based water-soluble binder are added to silica sand as a particulate aggregate, and after stirring to form a slurry, injection molding is performed. Therefore, based on a continuum model. Analyze molding behavior. The basic equations (1), (2), and (3) in this analysis are shown below.

[Number 1] =.

dt "

… (1)

[Equation 2]

― (V) = [▽. W]-[V. R]-+

όί

(2)

[Equation 3]

• · · (3)

[0026] The equation (1) is a continuous equation, and the equation (2) is a viscous fluid equation of motion.

(Navier-Stokes) equation, equation (3) represents the energy equation. Where p is the density, v is the velocity vector, and is the stress tensor expressed as viscosity and velocity gradient, p is the pressure, g is the gravity vector, Cp is the specific heat, T is the temperature, λ is the thermal conductivity, y is Shear rate. Since the slurry-like material is highly viscous, the time term (left side), inertia term (first term on the right side) and gravity term (fourth term on the right side) in Equation (2) may be zero. In this analysis, numerical analysis is performed by the finite element method.

(1) First, the measurement of viscosity will be described. Table 1 shows the physical properties, which are the physical properties of the core material, which has been agitated into a slurry, and Table 2 shows the analysis conditions such as the mold temperature. The moisture content of the core material is determined by weighing a predetermined amount of the core material in a 120 ° C drying oven for 1 hour or more. Above, it is measured by reduced weight after being sufficiently dried.

[table 1]

[Table 2]

[0028] Since the core material used in this analysis is a slurry-like material, it is considered that the core material has thixotropy whose viscosity depends on the shear rate. Therefore, the fluidity is investigated using the apparatus shown in Fig. 1 as a means for measuring the viscosity of the core material that is the slurry-like material in this analysis. Fill the cylinder 1 with the core material 2, pressurize it with the piston 3, and let it flow out of the pilot hole 4. By changing the pressure applied to the piston 3, the flow rate from the pilot hole 4 is changed, and the viscosity is calculated using equation (4) and the shear rate is calculated using equation (5).

Image μ ―

\ 2 Q

• . · ( Four )

[Equation 5]

320 • ■ · (5)

Here, the shear rate γ (1 / s) is calculated by the flow rate Q (m3 / s) flowing out from the lower hole 4 and the diameter D (= 0.006 m) of the lower hole 4. On the other hand, the viscosity (Pa's) is expressed by the pressure Pp (Pa) of the piston 3 and the length L (= 0.004 mm) of the lower hole 4. Figure 2 shows the results obtained. Both Plotting with a logarithmic graph shows a linear relationship, so it is approximated by the Arrhenius equation. From Fig. 2, it was confirmed that the viscosity decreased with increasing shear rate, indicating thixotropy. That is, in the actual molding process, the higher the injection speed, the better the fluidity. In this case, the moisture value was 4.2% and 4.7% for 1S. It was considered that there was almost no influence of the moisture value within this condition, and Equation (6) was obtained.

[Equation 6] = 746.5 X ⁸⁴⁵

(6)

(2) Next, measurement of the heat transfer coefficient between the mold and core material will be described. Mold core The heat transfer between the materials is a very important factor in the present invention. In this embodiment, as a first step, the amount of heat transferred from the mold to the core material is measured by a simple apparatus shown in FIG.

That is, the mold 5 is heated to 523 K (about 250 ° C.), and then the molding core material 6 stirred in a slurry state is applied at a predetermined pressure so as to be in close contact with the mold 5. Measure the temperature distribution in the core material 6. The temperature measuring means of the core material 6 which is the slurry material is inserted with a CA thermocouple 7 (φ 0. lmm) from above the core material 6 and brought into contact with the mold 5 at the temperature TX = 0 and the metal Measure the temperature TX = 10 at a position 10mm away from the mold surface. The temperature gradient is calculated from the measured temperature and the heat transfer coefficient h (W / m2K) is obtained by equation (7).

[Equation 7]

... (7)

[0032] Fig. 4 shows the obtained temperature measurement results and the calculated heat transfer coefficient. After the core material is placed on the mold surface 2.5 seconds later, the temperature of the surface in contact with the core material mold TX = 0 reaches 373 Κ (about 100 ° C), and the water evaporates. It has been broken. After that, there is no significant change during lOsec. Moreover, although the heat transfer coefficient h varies to some extent, a computer simulation is performed with 70 (W / m2K) as a representative value. Example 1

[0033] Next, the validity of the analysis model and various parameters is evaluated using the basic experimental model shown in Fig. 5. The core shape is a rectangular ring shape, the outer dimensions are 100mm x 100mm, and the cross section is a square of 10mm x 10mm. The core cavity volume is 40 x 10-6m3. In this basic experiment type, we will also check the condition of the weld where the core material joins.

[0034] Fig. 6 shows the analysis results when the injection flow rate Qi during molding was 79 X 10-6 m3Zs. The core material flows left and right symmetrically, and molding is completed after 0.5 seconds. The front line of the core material in the filling process had a smooth convex shape.

[0035] The molding behavior observed in this example is shown in FIG. In this embodiment, a core material is filled in a sleeve of φ ΙΟΟπι m, and injection molding is performed by an electric servo cylinder. The cylinder speed was set to 0. OlmZs—constant, and the recorder speed was confirmed by the recorder during the molding process. The forging time for filling almost symmetrically is 0.7 sec, which is slightly longer than the analysis result. This is considered to be because, in the initial stage of molding, the air existing between the cylinder and the core material is compressed and gradually flows out immediately before the cylinder contacts the core material in the sleeve. The front line of the core material in the filling process had a smooth convex shape, which was very close to the shape obtained by the analysis.

[0036] Next, Fig. 8 shows the temperature distribution immediately after the completion of molding when the injection flow rate Qi during molding is 79 X 10-6m3Zs and 393 X 10-6m3Zs. It is clear that the tip part is gradually heated during the molding process where the temperature of the final filling part is the highest. In addition, the one with a low ejection flow rate has a high temperature because it takes a long time to complete molding.

[0037] In addition, a CA thermocouple (φ 0. lmm) was inserted into the cavity of the final filling portion, and the temperature during molding was measured. The obtained results are shown in FIG. Prior to the start of molding, the air temperature rose to about 493K (about 220 ° C) due to radiant heat from the mold even within the cavity. For this reason, since the thermocouple measures the temperature of the core material at the time of molding, the temperature is lowered gradually, and then the temperature of the core material is increased by being heated by the mold. Table 3 shows the temperature of the final filling part immediately after molding.

[Table 3]

[0038] Overall, although the temperature of the analysis result is lower, it is considered that the influence of the molding injection flow rate can be expressed.

[0039] From the analysis up to this point and the results of the examples, it can be determined that the present analysis model and the meter are appropriate from the viewpoint of molding behavior and temperature distribution. In the future, by measuring parameters strictly,

This is considered to be close to the actual measurement result.

Example 2

[0040] Next, a core-scale computer simulation of an actual machine scale is performed. As the core of the actual machine scale, we performed core molding analysis and actual molding tests on the water jacket type of the cylinder block of an automobile engine. Figure 10 shows the shape of the core of the target water jacket. Figure 10 also shows six injection ports.

[0041] The injection flow rate was set to flow 330 X 10-6 m3Zs from each injection port. Figure 11 shows the filling behavior obtained from the analysis. The core material is filled in order from the vicinity of the six injection ports. Since the skirting board part at the back left is relatively small, the filling force in about 0.2 seconds The skirting board part on the right front side is large, so it is the final filling part. In this core, there are 6 injection ports, but filling is completed smoothly without any weld lines. The filling time was 0.6 seconds.

Next, FIG. 12 shows the temperature distribution immediately after completion of filling obtained by analysis. Filled at a relatively early stage, and the thin-walled part has the highest temperature, but since it is about 310K (about 37 ° C), no water vaporization has occurred and it has solidified. It is not considered. Figure 13 shows the core that was actually molded under these conditions. No weld line was observed in the unfilled part, and a very good core was obtained. In other words, it is considered that the core material did not solidify during the filling process, and the core material temperature solidified beyond 373K (about 100 ° C) after filling. In addition, aluminum was actually fabricated, and a good aluminum product was obtained. [0043] For this reason, it is preferable to determine the molding conditions in the injection molding analysis method by limiting the temperature so that the temperature of the slurry-like material does not exceed 100 ° C before the filling of the slurry-like material is completed. You can see this. Also, in the injection molding analysis method, before the completion of the filling of the slurry-like material, the temperature of the slurry-like material does not exceed 100 ° C and the limit is set so that the slurry can be filled in the shortest time. It can also be seen that it is preferable to obtain.

[0044] Furthermore, in the present invention, there is a risk that the composition may be cured before filling is completed depending on the blending and type of the binder of the slurry material, the shape of the molded product (for example, a complicated shape or thin wall), and the like. Therefore, it is desirable that the temperature of the filled slurry-like material is a predetermined temperature at which filling is completed at least before the binder is completely cured, for example, 200 to 250 ° C, preferably 100 ° C or less. . Therefore, it is preferable that the injection molding analysis method obtains the molding conditions by limiting the temperature so that the temperature of the filled slurry-like material is at least a predetermined temperature at which the filling is completed before the curing is completed. .

[0045] From the above analysis and the results of the examples, it is considered that the present analysis model and the parameter can express the molding phenomenon of the core system. Therefore, in the present invention, since the influence of the parameters on the moldability (fillability) is confirmed in advance and molded, it is possible to prevent filling failure.

Brief Description of Drawings

[0046] FIG. 1 is a schematic view of an apparatus for investigating the fluidity of a core material.

FIG. 2 is a graph showing the relationship between the shear rate and viscosity of the core material.

FIG. 3 is a schematic view of an apparatus for measuring the heat transfer coefficient between mold and core material.

[FIG. 4] FIG. 4 is a graph showing the results of measurement temperature and heat transfer coefficient in the measurement of the heat transfer coefficient between mold and core material.

[FIG. 5] FIG. 5 shows an analysis model of the present invention and a basic experiment type for evaluating the validity of various parameters.

[FIG. 6] FIG. 6 shows the analysis results of the molding behavior obtained using the basic experimental mold shown in FIG.

[FIG. 7] FIG. 7 shows experimental results of molding behavior obtained using the basic experimental mold shown in FIG.

[FIG. 8] FIG. 8 shows the temperature distribution result immediately after completion of molding, obtained using the basic experimental model shown in FIG. [9] Figure 9 shows the temperature measurement results in the cavity during molding, obtained using the basic experimental model shown in Figure 5.

FIG. 10 shows the shape of the water jacket core used in the example of the present invention.

[FIG. 11] FIG. 11 shows an analysis result of the filling behavior obtained by using the water jacket core shown in FIG.

[FIG. 12] FIG. 12 shows the analysis result of the temperature distribution immediately after completion of filling, obtained using the water jacket core shown in FIG.

[13] FIG. 13 shows a water jacket core actually formed using the analysis result of the present invention.

Claims

The scope of the claims

[1] A molding method that predicts the filling defects of sand mold molding, in which the filling sand is injected into the filling space of the model by injection of dredged sand, and enhances the filling property:

Inputting data relating to molding including molding conditions adopted by the injection molding machine, the shape of the filling space, and the physical properties of the sand;

A step of calculating the filling property of the slag sand by a sand molding analysis method based on the input data relating to the molding before the actual molding is performed;

Repeating the calculation by the sand mold molding analysis method by changing the molding conditions of the injection molding as necessary;

The injection molding machine is changed under the injection molding molding conditions changed so that the actual molding performed by the injection molding machine is performed based on the calculation result of the filling property of the sand sand by the sand mold molding analysis method. A step of operating;

Including

The sand mold making analysis method numerically calculates the equation of motion of the sediment sand so as to satisfy a continuous equation, and obtains the velocity equation distribution of the sediment sand after a minute time, Insufficient filling of sand mold by injection, characterized by comprising: a temperature distribution analysis step for calculating the temperature distribution of the sandy sand, a step of repeating the equation of motion analysis step, a step of analyzing the temperature distribution step, and the like. Molding method that predicts and enhances fillability.

[2] The molding method according to claim 1, wherein the injection molding machine converts the foamed mixture obtained by stirring the particulate aggregate, the water-soluble binder, and water into a heated mold cavity. A molding method characterized in that a saddle mold is formed by filling with a press-fitting method.

[3] The molding method according to claim 2, wherein the injection molding machine is configured to measure the temperature of the particulate aggregate or the foamed mixture, the viscosity measuring means of the foamed mixture, and the moisture of the foamed mixture. A molding method comprising at least one of measuring means.

[4] A vertical injection molding method in which a slurry-like material containing a binder is injected into a filling space inside a mold by injection to perform vertical molding, and molding is based on the judgment of the analysis result of the injection molding analysis method. A vertical injection molding method including a process of vertical molding under conditions.

[5] Fill the filling space inside the mold with a slurry-like material containing a binder by injection. A vertical injection molding method that performs mold making:

Analyze the injection molding analysis method based on the molding conditions set at the time of molding and the molding data including physical properties that are the physical properties of the slurry material, and change the molding conditions based on the results of the analysis Determining whether or not to do;

Performing an actual vertical molding performed by the vertical injection molding apparatus under molding conditions based on the determination;

A vertical injection molding method.

[6] A vertical injection molding method in which a slurry-like material containing a binder is injected into a filling space inside a mold by injection to perform vertical molding:

Storing data relating to molding, including molding conditions set during molding and physical properties that are physical properties of the slurry-like material;

A step of temporarily setting parameters necessary for the injection molding analysis method stored in advance in the input data relating to the molding before molding is actually performed;

Analysis of the injection molding analysis method using the temporarily set parameters was performed, and in order to obtain a good analysis result, the calculation by the injection molding analysis method was repeated while changing the molding conditions.

Determining a parameter; and

A step of performing an actual molding performed by the injection molding apparatus under modified molding conditions so as to match an analysis result of the injection molding analysis method using the determined parameters; Law.

[7] The vertical injection molding method according to claim 4, 5 or 6, wherein the analysis of the injection molding analysis method is performed by applying the temperature force SlOO ° C of the slurry material before the slurry material is completely charged. Inferior

V, is a vertical injection molding method with restrictions.

[8] The vertical injection molding method according to claim 4, 5 or 6, wherein the analysis of the injection molding analysis method is performed by setting the temperature force SlOO ° C of the slurry material before the slurry material is completely charged. A vertical injection molding method in which restrictions are added so that it can be filled in the shortest possible time.

[9] The vertical injection molding method according to claim 4, 5 or 6, wherein the analysis of the injection molding analysis method is performed until the temperature of the filled slurry material is at least before the curing of the binder is completed. Vertical injection molding that is restricted to a predetermined temperature at which filling is completed Type method.

[10] The vertical injection molding method according to any one of claims 4 to 9, wherein the injection molding analysis method numerically satisfies the equation of motion of the slurry material so as to satisfy a continuous equation. A vertical type that is an analysis method that repeats the analysis of the equation of motion to calculate the velocity distribution of the slurry-like material after a minute time and the analysis of the temperature distribution to calculate the temperature distribution of the slurry-like material at that time Injection molding method.

[11] Based on the molding conditions set at the time of molding and the data relating to molding including the physical property values that are the physical properties of the slurry-like material, the converter is used to analyze the injection molding analysis method. The equation of motion is numerically calculated so as to satisfy the continuity equation, the equation of motion for obtaining the velocity distribution of the slurry-like material after a minute time is analyzed, and the temperature distribution for calculating the temperature distribution of the slurry-like material at that time is calculated. An analysis program for injection molding analysis to function as a calculation means that repeats distribution analysis.