JPH10119063A - Cast polyamide resin molding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cast polyamide resin molding tool, from which plate-like molded bodies can easily be unloaded, by a method wherein a polymerizable lectam liquid is prevented from leaking by ensuring the pinchingly fixation of tools and, further, a short time pinchingly fixation and separation of tool members constituting the tool is realized. SOLUTION: This cast polyamide resin molding tool is used for manufacturing a plurality of plate-like cast polyamide resin molded bodies by anionically polymerizing a polymerizable lactam liquid in a tool so as to arrange at least one or more temperature controllable movable middle hot platens 5 between two temperature controllable side hot platens 2 and 3, at least either one of which is made movable, and interpose spacers 6, in each of which a cavity 9 for casting the polymerizable lactam liquid is formed, among a pair of the side hot platens 2 and 3 and the movable middle hot platens 5 in order to install a clamping device 7, which can pinchingly fix the above mentioned respective members into an integral body and, at the same time, release them, on the one side hot platen.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cast polyamide resin molding die, and more particularly, to a molding die used for producing one or more plate-like cast polyamide resin molded articles, and holding and fixing the mold. Cast polyamide resin molding that can prevent the leakage of the polymerizable lactam solution, and can clamp and fix and separate the constituent mold members in a short time, and easily remove the plate-like molded product from the mold. It is about type.

[0002]

2. Description of the Related Art In a method for producing a cast polyamide molded article,
Mold made of aluminum, iron, etc. in a hot blast stove at 180-190 ° C
After the mold was heated to the temperature set in the above, the mold at the predetermined temperature was taken out of the furnace, a polymerizable lactam liquid was poured into the mold, and the mold was placed again in a hot-blast furnace to polymerize the lactam.
However, according to this method, when the heated mold is taken out of the hot blast stove and the lactam polymerization liquid is cast, the mold comes into contact with the outside air, causing heat unevenness at the mold temperature, thereby producing a high quality molded body. Was difficult.

Further, after the polymerization, when the mold is taken out of the hot air oven and the molded body is released, the mold temperature drops by about 40 to 50 ° C. because the mold comes into contact with the outside air. Before this, the mold had to be sufficiently heated again in a hot-air stove until the desired casting temperature was reached, and a large amount of mold preheating time was required for each mold release. For this reason, a high-speed production method in which a polymerizable lactam liquid is poured into a mold forcibly maintained at an arbitrary temperature, polymerized under adiabatic conditions, and the obtained molded body is peeled off from the mold surface, is a special method. It is disclosed in Japanese Patent Publication No. 2-44694.

[0004]

However, according to this method, the thickness is about 2 to 20 mm, and when a molded body having a thickness larger than that is produced, a temperature gradient is generated between the surface and the inside of the molded body. As a result, a molded product having an internal cavity defect may be obtained. In addition, when a molded article having a large size is taken out of the mold without separating the mold, an operation time is required. Therefore, improvement of the mold has been strongly desired. The present invention has been made to solve such a problem, and ensures that the mold is held and fixed to prevent leakage of the polymerizable lactam liquid, and that the formed mold member is held and fixed and separated in a short time. It is another object of the present invention to provide a cast polyamide resin mold in which a plate-like molded body can be easily removed from the mold.

[0005]

That is, according to the invention of claim 1 of the present application, a cast polyamide resin used for producing a plate-like cast polyamide resin molded article by anionic polymerization of a polymerizable lactam liquid in a mold. In the molding die, a spacer that forms a cavity for casting the polymerizable lactam liquid is interposed between the temperature-adjustable side heating plates that allow at least one of them to move, and these members are integrally clamped and fixed. In the cast polyamide resin mold equipped with a clamp device that can be opened on one side of the hot plate, the clamp device is used to securely clamp the mold and prevent leakage of the polymerizable lactam liquid, The holding and fixing and separation can be performed in a short time, and the plate-like molded body can be easily taken out of the mold.
Further, since the temperature is adjusted by flowing the heat medium oil into the member forming the cavity, it is possible to mold a molded article having a large thickness and no internal cavity defects.
In addition, temperature control and temperature control of the mold from the time of casting the polymerizable lactam liquid to the time of demolding of the molded body can be accurately controlled, and heat loss is small.

According to the invention of claim 2 of the present application, at least one of the cast polyamide resin molds used for producing a plurality of plate-like cast polyamide resin molded articles by anionic polymerization of a polymerizable lactam liquid in the mold. At least one temperature-adjustable side heat plate between which the temperature is adjustable
More than one moving hot plate is arranged, and a spacer forming a cavity for casting a polymerizable lactam liquid is interposed between each pair of side hot plates and the moving hot plate, and each of these members The casting polyamide resin mold has a clamp device that can be integrally clamped and opened while being mounted on one side of the hot platen. In addition to the invention described in claim 1, the mold is securely clamped and fixed to be polymerizable. Since the lactam liquid does not leak, a plurality of plate-shaped cast polyamide resin molded articles having different thicknesses and materials can be simultaneously manufactured.

In the invention according to claim 3 of the present application, since the heat insulating material is attached to the back of each hot platen, the temperature of the mold can be adjusted from the time of casting the polymerizable lactam liquid to the time of removing the molded body. Temperature control can be controlled accurately and heat loss is small.

[0008] In the invention according to claim 4 of the present application, the spacer is a frame body with one side open, and the frame body has a passage for flowing the heat transfer oil, and packing is provided on the surface of the frame body that comes into contact with the hot platen. Due to the fitted configuration, the temperature of each hot plate and the spacer forming the cavity can be controlled, and the temperature control and temperature control of the mold can be accurately controlled, and the adhesion between the members forming the cavity can be enhanced. As a result, a cavity in which the polymerizable lactam liquid does not leak can be obtained.

In the invention according to claim 5 of the present application, the spacer is attached to at least one hot plate selected from the pair of side hot plates and the moving hot plate in advance. The time required to assemble and clamp and fix the mold members made of hot plates is reduced.

In the invention according to claim 6 of the present application, the clamping device comprises a side clamping device attached to the left and right sides of the fixed-side hot platen and a bottom clamping device attached to the lower side. By uniformly dispersing the force, leakage of the polymerizable lactam liquid can be prevented, and a molded article having a very stable thickness can be obtained.

In the invention according to claim 7 of the present application, the side clamping device allows the arm to move horizontally to hold and fix each heating plate and the spacer integrally, and each heating plate by rotating the arm. And the arm swivel member that separates the arm from the hot platen and the spacer after the end of the polymerization. This makes it easy for workers to get in and out of the device, making it easier to remove the molded body. become.

[0012] In the invention according to claim 8 of the present application, the bottom clamping device allows the arm to move horizontally so as to integrally clamp and fix each of the heating plates and the spacer, and the heating plate by dropping the arms. The arm pivot member is separated from the spacer and the spacer, so that the arm does not pivot greatly, and does not adversely affect the operator when the molded article is released from the mold.

[0013]

FIG. 1 is a front view showing a state where constituent members of a cast polyamide resin mold according to the present invention are separated.
FIG. 2 is a plan view showing a state in which components of the cast polyamide resin mold are brought together in FIG. 1 and integrally clamped and fixed. FIG. 3 shows a state in which a clamp device is mounted on a fixed-side hot platen shown in FIG. FIG. 4 is a plan view seen from the AA direction in FIG.

Cast polyamide resin mold 1 shown in FIG.
The fixed-side hot platen 2 having the plate-shaped mold 4 mounted thereon, the moving-side hot platen 3 similarly mounted with the plate-shaped mold 4 and disposed opposite the fixed-side hot platen 2, Interposed between at least one or more moving hot plates 5 arranged between the moving hot plates 3 and each of the fixed hot plates 2, the moving hot plates 3 and the moving hot plates 5; A spacer 6 forming a cavity 9 for casting a polymerizable lactam liquid, and a moving platen 3 moved to the fixed platen 2 side to form a hot plate and a spacer member integrally forming the cavity 9 are integrally clamped. It consists of a clamping device 7 which is fixed and opened.

In the fixed-side hot platen 2, a heat insulating plate 11 is vertically fixed on a horizontally arranged support base 10, and the heat insulating plate 1
A heat insulating material 12 such as rock wool is mounted on the entire back of the heat sink 1, and a plate-shaped mold 4 is held and mechanically fixed to the front of the heat insulating panel 11 by a projecting frame 13.

In the moving-side hot platen 3, similarly to the fixed-side hot platen 2, a heat insulating plate 11 is vertically fixed to a horizontally arranged support base 10, and a heat insulating material 12 is provided on the entire back surface of the heat insulating plate 11. At the same time, the plate-shaped mold 4 is held and mechanically fixed to the front surface of the heat insulating panel 11 by the projecting frame 13. However, in the moving-side hot platen 3, the support 10 is
And a rail 22 provided on the substrate 21
It can be moved manually or automatically on the upper side to approach the fixed-side hot platen 2 side and to be separated therefrom. In addition, the plate-shaped mold 4
It has the same structure as that attached to the fixed-side hot platen 2.

As shown in FIGS. 5 and 6, the plate-shaped mold 4 is a hollow body formed of a metal plate such as aluminum, iron, or the like. 1
5 are provided at regular intervals, and have an oil passage 16 which communicates with the heat medium oil. When the heat transfer oil enters from an oil port 17 provided on the lower side of the plate-shaped mold 4, it flows through a communicating oil passage 16 and heats the entire inside of the plate-shaped mold 4 from an oil outlet 18 provided on the upper side. The oil is discharged, travels to the heat medium oil circulation device 8 via the pipe 19, and circulates therebetween. In addition, the above-mentioned bar 1
5 is a reinforcing material for preventing deformation of the plate-shaped mold 4,
A molded article having a stable thickness and less variation can be obtained.

Between the fixed-side hot platen 2 and the moving-side hot platen 3, a plurality of moving hot plates 5 having the same structure as the plate-shaped mold 4 having an oil passage through which the heat medium oil flows are provided. (Here 3
) Are arranged in parallel. As shown in FIGS. 1 and 4, the moving hot platen 5 includes a cart 26 having two wheels 25 installed on one of the plurality of rails 22 laid on the board 21, Is fixed across a truck 26 having two other wheels 25 installed on one rail 22. In addition, since the distances between the carts 26 of the moving hot plates 5 are different from each other, the moving hot plates 5 can approach each other without bringing the carts 26 into contact even when they are brought closer to each other. In this embodiment, the distance between the carriages 26 of the moving hot platen 5 close to the fixed-side hot platen 2 is the largest, and the moving-side hot platen 3
It is getting smaller towards. Of the two rails 22, one of the rails 22 and the wheel 25 are fitted, and the moving hot platen 5 does not come off the rail 22 during the movement.

Of course, in the present invention, it is not necessary to use the hot platen 5 while moving.

As shown in FIGS. 7 to 9, the spacer 6 is a U-shaped frame having one side open, and a through hole 30 is provided on each side at regular intervals to allow a bolt to pass therethrough. Inside the outer periphery of the frame, there is a communicating oil passage 31 through which the heat medium oil passes, and the heat medium oil passes through an oil passage 31 from an oil port 32 provided at the upper part of the side, and passes through the oil passage 31 on the opposite side. Exit the oil outlet 33 provided at the top,
The spacer 6 is heated.

In order to enhance the sealing effect between the spacer 6 and the hot platen 5 during the movement and between the spacer 6 and the plate mold 4,
A packing 34 made of a rubber elastic material such as urethane or silicone rubber or a fluorine resin material is fitted into and attached to the dovetail grooves 35 provided on both surfaces of the frame of the spacer 6. Since the packing 34 is fitted into the dovetail groove 35, it does not easily come off. In this case, the spacer 6 is fixed by inserting bolts from the through holes 30 into the plate-shaped mold 4 of the fixed-side hot platen 2 or the moving-side hot platen 3 or one surface of the moving hot platen 5.

The clamp device 7 has a function of moving the movable hot platen 3 toward the fixed hot platen 2 side to integrally clamp and fix each hot plate forming the cavity 9 and the spacer 6 and opening the same. ing. As shown in FIG. 3, the clamp device 7 is a side clamp device 7 attached to the left and right sides 37 of the fixed-side hot platen 2.
a and a bottom clamping device 7b mounted on the lower side portion 38.

The side clamp device 7a shown in FIG. 10 is an arm holding member 40 for holding and fixing each of the hot plates and the spacers 6 integrally forming the cavity 9 by horizontally moving the arm, and turning the arm. It is constituted by an arm turning member 41 which releases the holding and fixing of each heating plate forming the cavity 9 and the spacer 6 and moves away from them. In the clamp device 7a, the bracket 44 on which the air cylinder 43 is rotatably mounted is attached to the frame 46 of the fixed-side hot platen 2 via the heat insulating material 45 and the end of the plate-shaped mold 4 of the other fixed-side hot platen 2. , A support block 47 is fixed with screws via a heat insulating material 48.

In the arm holding member 40, the arm 50 has a front end portion 51 bent at a right angle and a rear end portion 53 having a through hole 52 into which a rod is fitted. The arm 50 is inserted into a through hole 52 provided in the rear end portion 53. The connected rod 54 is connected to the hydraulic cylinder 55. The rod 54 forms a sliding part 56 of a hemispherical body with a protruding tip, and is in contact with a sliding part 57 of a depressed hemispherical body provided on the support block 47.

A shaft is inserted into a through hole provided in the vicinity of the tip of the rod 54, and serves as a turning shaft 58 of the arm holding member 40. When the hydraulic cylinder 55 is operated to cause the rod 54 to protrude in the arm holding member 40, the sliding portion 57 of the concave hemispherical body of the support block 47 is formed.
When the arm 50 comes into contact with the sliding portion 56 of the hemispherical body projecting from the rod 54, the arm 50 receives the load, and the arm 50 moves in the direction of integrally holding and fixing each of the hot plates forming the cavity 9 and the spacer 6.

The sliding part 57 of the concave hemispherical body of the support block 47 and the sliding part 5 of the hemispherical body protruding from the rod 54
By having 6, the pivot shaft 58 is not subjected to a clamping force, and the pivot shaft 58 can be downsized. Furthermore,
The hydraulic cylinder 55 can be attached to the fixed-side hot platen 2 side, so that an operator can easily enter and exit the apparatus.

In the arm swiveling member 41, the air cylinder 43 is swingably mounted on a bracket 44 fixed to the frame 46 of the fixed-side hot platen 2, and the rod 60 of the air cylinder 43 is connected to the arm 50 via a lever and a swing shaft 58. It is connected to. When the air cylinder 43 operates and the rod 60 is retracted, the arm 50 pivots about the pivot shaft 58. At this time, since the sliding portion 56 of the rod 54 and the sliding portion 57 of the support block 47 have a hemispherical shape,
The arm 50 can turn smoothly.

As shown in FIGS. 11 and 12, the bottom clamping device 7b comprises an arm clamping member 40 and an arm turning member 41. The arm clamping member 40 has the same structure as that of the side clamping device 7a. I have.

In the arm turning member 41, a hollow elongated slant rail 7 is provided on the lower bottom of the arm 50 via a heat insulating material 70.
1, the inclined rail 71 has two shafts 72, 73 fixed therein. The shaft 72 is connected to a rod 75 of an air cylinder 74 fixed to the support 21, and the arm 50 is moved upward by the operation of the air cylinder 74, and the other shaft 73 is a shaft 77 installed on the support 21. , And serves as a pivot axis of the arm 50.
At both ends of the inclined rail 71, stoppers 78 for restricting the movement of the inclined rail 71 are provided.

In the bottom clamping device 7b, the hydraulic cylinder 55 of the arm holding member 40 is operated to move the rod 5
4 is retracted, the arm 50 is released from the holding and fixing of each of the hot plates forming the cavity 9 and the spacer 6 and the air cylinder 74 is operated. When the rod 75 is lowered, the arm 50 is moved by its own weight to the shaft 73. Turning around the center axis while falling. At this time, the moving inclined rail 7
The first stopper 78 comes into contact with the shaft 73, and the drop of the arm 50 stops.

The heat medium oil circulation device 8 includes a heating device for heating the heat medium oil put in the tank and a pump for circulating the heat medium oil. The plate-shaped mold 4 mounted on the hot platen 3, the hot platen 5 during movement, and the spacer 6 are connected.

Next, a method for producing a cast polyamide resin molded article using the production apparatus according to the present invention will be described below. First, three moving hot plates 5 whose temperature has been adjusted are arranged between the fixed hot platen 2 and the moving hot platen 3 whose temperature has been adjusted, and further the fixed hot platen 2, the moving hot plate 5 and Spacers 6 having different thicknesses are fixedly mounted on one surface of the moving-side hot platen 3 with bolts. In this case, the spacer 6 is not mounted on the moving hot platen 5 located in the middle of the three plates. Thereafter, the movable hot platen 3 is moved to form the cavity 9 for casting the polymerizable lactam liquid by sandwiching the spacer 6 between the hot plates, and these members are connected to the left and right sides of the fixed hot platen 2. The plurality of side clamp devices 7a mounted on the side 37 and the plurality of bottom clamp devices 7b mounted on the lower side 38 integrally hold and fix.

That is, the hydraulic cylinder 55 of the side clamping device 7a and the bottom clamping device 7b is operated to
4 is protrudingly moved, and the sliding portion 57 of the concave hemispherical body of the support block 47 abuts against the sliding portion 56 of the protruding hemispherical body of the rod 54 to receive a load, and the arm 50 forms the cavity 9. The hot platen and the spacer 6 are integrally moved in the direction of clamping and fixing. Further, the heating medium oil is introduced from the heating medium oil circulation device 8 to the plate-shaped mold 4 mounted on the fixed-side heating platen 2 and the moving-side heating platen 3, the moving heating platen 5, and the spacer 6, and
The temperature is adjusted to 30 to 190 ° C. and preheated.

Thereafter, a polymerizable lactam liquid is poured into the cavity 9, and a metal tubular body coated with a resin material is inserted into the opening of the cavity 9 and anion-polymerized in a closed state. The polymerization time is 20 to 100 minutes, and when this is completed, the temperatures of the plate-shaped mold 4 of the fixed-side hot platen 2 and the moving-side hot platen 3, the moving hot platen 5, and the spacer 6 are reduced to the temperatures at the time of preheating. .

The hydraulic cylinders 55 of the side clamp device 7a and the bottom clamp device 7b are operated to move the rod 54 in the retracting direction, and the arm 50 is moved to the cavity 9
Is moved to the side where the holding and fixing of each of the hot plates and the spacer 6 forming the above are opened. Subsequently, by the arm turning member 41,
The rod 60 is retracted, and the arm 50 is turned. Further, in the bottom clamp device 7b, when the clamping and fixing of the arm 50 is released, the arm 50 is dropped by its own weight and turned.

After the plate-shaped mold 4, the moving hot platen 5, and the spacer 6 of the fixed hot platen 2 and the moving hot platen 3 are mechanically opened in this manner, the moving hot platen 3 is returned to its original state. When returned to the position, the operator can easily enter the mold and take out the plurality of plate-like cast polyamide resin molded articles.

The polymerizable lactam solution is obtained by adding an anionic polymerization catalyst and an anionic polymerization initiator to ω-lactam, and the ω-lactam is substantially anhydrous α-piperidone, ε-caprolactam, ω-lauro. Lactam or a mixture of two or more of these, and industrially advantageous lactams are ε-caprolactam and ω-laurolactam.

As the anionic polymerization catalyst, known ω-lactam polymerization catalysts such as sodium hydride, lithium hydride, sodium and potassium can be used. 1 to 2.0 mol%. And, as the initiator for anionic polymerization, for example, N-acetyl-ε-caprolactam, isocyanate,
Diisocyanates, urea derivatives, urethanes, and isocyanurate derivatives, and the added amount thereof is preferably in the range of 0.05 to 1.0 mol% based on ω-lactam.

In the above production method, the anion polymerization catalyst
A method of adding and mixing an anionic polymerization initiator at or after casting after adding and dissolving to a lactam, or injecting an ω-lactam containing an anionic polymerization catalyst and an ω-lactam containing an anionic polymerization initiator. It is adjusted by a method of adding and mixing at the time of molding or after casting.

In carrying out the method of the present invention, oils, waxes, zinc stearate, calcium stearate and the like which do not inhibit polymerization, and reinforcing materials such as carbon fiber and wollastonite may be added in addition to the above components. It is possible.

[0041]

As described above, according to the first aspect of the present invention, a spacer for forming a cavity for injecting a polymerizable lactam liquid between a temperature-adjustable side heating plate at least one of which is movable. There is a cast polyamide resin mold equipped with a clamp device that can clamp and fix each of these members integrally and open it on one side hot plate,
By using a clamp device, the mold is securely clamped and fixed, preventing leakage of the polymerizable lactam liquid, clamping and fixing and separating the mold members in a short time, and the plate-shaped molded body can be easily removed from the mold. it can. Further, since the temperature is adjusted by flowing the heat medium oil into the member forming the cavity, it is possible to mold a molded article having a large thickness and no internal cavity defects. In addition, temperature control and temperature control of the mold from the time of casting the polymerizable lactam liquid to the time of demolding of the molded product can be accurately controlled, and there is an effect of reducing heat loss.

According to the invention of claim 2 of the present application, at least one of the cast polyamide resin molds used for producing a plurality of plate-like cast polyamide resin molded articles by anionic polymerization of a polymerizable lactam liquid in the mold. At least one temperature-adjustable side heat plate between which the temperature is adjustable
More than one moving hot plate is arranged, and a spacer forming a cavity for casting a polymerizable lactam liquid is interposed between each pair of side hot plates and the moving hot plate, and each of these members In the casting polyamide resin molding die having a clamp device capable of integrally clamping and releasing the same while being mounted on one of the hot plates, the use of a hot plate while moving is particularly advantageous. In addition, since the polymerizable lactam liquid does not leak while ensuring the clamping and fixing of the mold, there is an effect that a plurality of plate-like cast polyamide resin molded articles having different thicknesses and materials can be simultaneously manufactured.

In the invention according to claim 3 of the present application, since the heat insulating material is attached to the back of each hot platen, the temperature of the mold can be adjusted from the time of casting the polymerizable lactam liquid to the time of removing the molded body. Temperature control can be controlled accurately, and there is an effect that heat loss is small.

According to the invention described in claim 4 of the present application, the spacer is a frame having one side open, and the frame has a passage for flowing the heat transfer oil, and packing is provided on the surface of the frame which comes into contact with the hot platen. Due to the fitted configuration, the temperature of each hot plate and the spacer forming the cavity can be controlled, and the temperature control and temperature control of the mold can be accurately controlled, and the adhesion between the members forming the cavity can be enhanced. Thus, there is an effect that a cavity in which the polymerizable lactam liquid does not leak can be obtained.

In the invention according to claim 5 of the present application, the spacer is previously attached to at least one hot plate selected from the pair of side hot plates and the moving hot plate. This has the effect of shortening the time required to collect and fix the mold members made of hot plates and to clamp and fix them.

In the invention according to claim 6 of the present application, the clamping device comprises the side clamping device mounted on the left and right sides of the fixed-side hot platen and the bottom clamping device mounted on the lower side. This has the effect of uniformly dispersing the force, preventing leakage of the polymerizable lactam liquid, and obtaining a molded article having a very stable thickness.

In the invention according to claim 7 of the present application, the side clamping device allows the arm to move horizontally to hold and fix the respective hot plates and the spacer integrally, and the respective hot plates by rotating the arm. And the arm swivel member that separates the arm from the hot platen and the spacer after the end of the polymerization. This makes it easy for workers to get in and out of the device, making it easier to remove the molded body. Has the effect of becoming

According to the invention of claim 8 of the present application, the bottom clamping device allows the arm to move horizontally to hold and fix the respective hot plates and the spacers integrally, and the respective hot plates by dropping the arms. The arm pivot member is separated from the spacer and the spacer, so that the arm does not pivot greatly, and does not adversely affect the operator when the molded article is released from the mold.

[Brief description of the drawings]

FIG. 1 is a front view showing a state where constituent members of a cast polyamide resin mold according to the present invention are separated.

FIG. 2 is a plan view showing a state in which constituent members of a cast polyamide resin mold are brought together in FIG. 1 and integrally clamped and fixed.

FIG. 3 is a diagram showing a state where a clamp device is mounted on the fixed-side hot platen shown in FIG. 1;

FIG. 4 is a plan view seen from an AA direction in FIG. 1;

FIG. 5 is a front view of the plate-shaped mold.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a front view of the spacer.

FIG. 8 is a sectional view taken along the line BB of FIG. 7;

FIG. 9 is an enlarged view of a portion C in FIG. 8;

FIG. 10 is a plan view of the side clamp device.

FIG. 11 is a front view of the bottom clamping device.

FIG. 12 is a view showing a state where the bottom clamp device of FIG. 11 has released the holding and fixing of each hot plate forming a cavity and a spacer member.

[Explanation of symbols]

 2 Fixed-side hot platen 3 Moving-side hot platen 4 Plate-shaped mold 5 Moving hot platen 6 Spacer 7 Clamp device 7a Side clamp device 7b Bottom clamp device 8 Heat transfer oil circulation device 9 Cavity

Continued on the front page (51) Int.Cl. ⁶ Identification code FI // B29K 77:00

Claims (8)

[Claims] 1. A castable polyamide resin mold used for producing a plate-like cast polyamide resin molded article by anionic polymerization of a polymerizable lactam liquid in the mold, wherein at least one of the castable polyamide resin molds has a temperature-adjustable side. A spacer that forms a cavity for casting the polymerizable lactam liquid is interposed between the hot plates, and a clamp device that can clamp and fix these members integrally and open it is mounted on one side hot plate. Casting polyamide resin mold. 2. In a cast polyamide resin mold used for producing a plurality of plate-like cast polyamide resin molded articles by anionically polymerizing a polymerizable lactam liquid in a mold, at least one of the molds is movable so that the temperature can be adjusted. At least one or more moving hot plates whose temperature can be adjusted are placed between
A spacer that forms a cavity for injecting a polymerizable lactam liquid is interposed between each hot plate consisting of a pair of side hot plates and a moving hot plate, and a clamp that can integrally hold and open these members while releasing them. A cast polyamide resin mold, wherein the device is mounted on one of the hot plates. 3. The cast polyamide resin mold according to claim 1, wherein a heat insulating material is attached to the back of each side heating plate. 4. A frame body in which the spacer is open on one side,
3. The frame according to claim 1, wherein the frame has a passage through which the heat medium oil flows, and the packing is fitted on the surface of the frame in contact with the hot platen.
The cast polyamide resin mold according to the description. 5. The cast polyamide resin mold according to claim 1, wherein the spacer is previously attached to at least one hot plate selected from a pair of side hot plates and a moving hot plate. 6. The cast polyamide resin according to claim 1, wherein the clamping device comprises a side clamping device attached to the left and right sides of the fixed hot platen and a bottom clamping device attached to the lower side. Mold. 7. An arm clamping member for horizontally clamping an arm by a side clamping device to clamp and fix each heating plate and the spacer integrally, and an arm turning member for turning the arm to separate from each heating plate and the spacer. The cast polyamide resin mold according to claim 1, 2 or 6. 8. An arm holding member for allowing the bottom clamp device to horizontally move the arm to hold and fix each hot plate and the spacer integrally, and an arm turning member for separating the hot plate and the spacer by dropping the arm. The cast polyamide resin mold according to claim 1, 2 or 6.