JP3130808B2 - Manufacturing equipment for columnar cast polyamide resin moldings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a columnar cast polyamide resin molded article, and fixes a cylindrical mold body to a precise position by fixing the cylindrical mold body to a casting position of a polymerizable lactam liquid. The present invention relates to an apparatus for manufacturing a columnar cast polyamide resin molded article that can move accurately and that prevents a cylindrical mold body from falling over.

[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 preheated 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 blast 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, this method relates to a plate-like molded body, and when manufacturing a columnar molded body, the inner space of the mold must be a curved cylindrical shape. There was a need to invent an excellent columnar mold that constituted an oil passage that matched the curved surface and had no temperature gradient. If the curved surface mold has a temperature gradient, a temperature gradient also occurs in the formed body, and the formed body has a cavity defect. In the case of a cylindrical molded body without any oil passage as in the conventional device,
Although the mold manufacturing cost was reduced, the retention of the heat transfer oil occurred on the opposite side of the mold, the temperature gradient of the mold became large, and temperature unevenness occurred.

Another problem is that since the cylindrical mold is simply placed on the base, when the base is moved, the cylindrical mold may move slightly or fall over. Not only is it dangerous for the user, but also the cylindrical mold cannot be accurately moved to the casting position of the polymerizable lactam liquid.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to fix a cylindrical mold body to accurately set a position and to move the cylindrical mold body accurately to a casting position of a polymerizable lactam liquid. It is an object of the present invention to provide an apparatus for manufacturing a columnar cast polyamide resin molded article which can be manufactured and which prevents the cylindrical mold body from falling down.

[0007]

That is, according to the first aspect of the present invention, a cylindrical mold body whose temperature can be adjusted is fixed to a predetermined position and moved to a casting position, and a polymerizable lactam is contained therein. In a device for casting columnar cast polyamide resin molded products by casting liquid, a transport cart that reciprocates in a certain direction
Place at least one or more mold setting parts on the
Part or all of the mold installation sections of the mold installation section
Lock the bottom of each cylindrical mold that allows temperature adjustment
In the manufacturing equipment of the columnar cast polyamide resin molded body equipped with a heat medium oil circulating device that fixes the position of the heat medium oil and sends it to the cylindrical mold while controlling the temperature of the heat medium oil,
The cylindrical mold body is fixed by the lock mechanism to make the position setting accurate, and the cylindrical trolley can be accurately moved to the casting position of the polymerizable lactam liquid by the transport cart, preventing the cylindrical mold body from falling over can do.

According to a second aspect of the present invention, a lock mechanism is provided.
Are the claws screwed into the rotating right and left threads, respectively.
Move the part and fix it to the bottom of the cylindrical mold.
Because it is to be locked to the tool part, cylindrical mold
The fixation of the body to the mold installation portion can be reliably completed early.

According to the invention of claim 3 of the present application, the transport vehicle is installed on a traveling vehicle that reciprocates in a certain direction, and the traveling vehicle reciprocates in a direction intersecting the moving direction of the transport vehicle. The individual cylindrical molds fixed to the carrier can be quickly and accurately moved to the casting position of the polymerizable lactam liquid.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an entire apparatus for producing a columnar cast polyamide resin molded article according to the present invention, and FIG.
1, FIG. 3 is a side view of AA part of FIG. 1, FIG. 4 is a side view of BB part of FIG. 1, FIG. 5 is an enlarged view of a part C of FIG. 3, and FIG. It is a D section enlarged view. A manufacturing apparatus 1 for a columnar cast polyamide resin molded article according to the present invention is arranged on a transporting trolley 2 that reciprocates in a fixed direction and on the transporting trolley 2.
One or more mold setting sections, and one of the mold setting sections.
Temperature control for all or all mold placements
Lock mechanism to fix the bottom of each cylindrical mold body
And a heat medium oil circulating device for controlling the temperature of the heat medium oil and sending it to the cylindrical mold body.

The transporting trolley 2 is installed on the traveling trolley 7 and reciprocates in a direction perpendicular to the moving direction of the traveling trolley 7. A traversing device 10 is installed on the frame 9 of the transport trolley 2, and the traversing device 10 is a motor 1 such as a servomotor.
1 rotates a ball screw 14 installed in the width direction of the carriage 2 via a reduction gear 12 and a toothed belt 13, and moves a nut base 15 screwed to the ball screw 14 to the left and right, so that the wheel 18 is moved. To reciprocate the carriage 2 by a fixed stroke. In addition, the transporting cart 2 is provided with a working step 19 serving as a working table at a front part and a rear part, and a piping 17 for a heat transfer oil is provided inside.

The traveling carriage 7 has four wheels 21 mounted on a frame 20, and further includes a motor 22 such as a servomotor and a heat medium oil circulation device 6. A gear-shaped pinion 23 mounted on the prime mover 22 meshes with a rack (not shown) provided under the floor. The rotation of the prime mover 22 causes the traveling carriage 7 to move forward and backward by a predetermined amount, and the transport carriage 2 and the prime mover 2
2, and the heat medium oil circulation device 6 is simultaneously moved.

A mold setting section 4 for setting the cylindrical mold body 3 is arranged in parallel on the transporting trolley 2, and a pair of rows in which block-shaped support bases 25 for directly setting the cylindrical mold body 3 are connected in series. Are arranged in parallel at fixed intervals to form a valley 26 between the support tables 25, and the valley 26 is provided with a lock mechanism 5 for fixing the bottom of the cylindrical mold body 3.

The lock mechanism 5 has valleys 26 between the supports 25 so as to accommodate and fix the bottom of each cylindrical mold body 3.
The right-hand thread 27 and the left-hand thread 28 are mounted on a bearing 29 and are connected via a coupling 30 arranged at the center. A claw portion 31 is screwed to each of the screw portions 27 and 28, and the claw portion 31 moves in a direction approaching each other by a motor or manual rotation,
It is engaged with a fixing part 32 fixed to the bottom of the cylindrical mold body 3. Then , by rotating one of the screw portions in the reverse direction, the claw portion 31 is moved in a direction to move away, and the lock of the cylindrical mold body 3 is released.

The cylindrical mold body 3 is made of aluminum, iron or the like .
A spiral partition wall 36 is formed in a cylindrical space which is formed of two metal cylinders made of a metal and has an oil passage 35 surrounded by the two cylinders. The heat medium oil sent from the heat medium oil circulation device 6 passes through an oil passage 38 from a heat medium oil inlet 37 provided at the bottom of the cylindrical mold body 3 and passes through a heat medium oil outlet 39 to the heat medium oil of the cylindrical mold body 3. The oil enters the oil inlet 40, passes through the inside of the cylindrical mold body 3 from bottom to top through the oil passage 35, and is discharged from the heat medium oil outlet (not shown) provided on the upper side.
The heat medium oil circulation device 6 is reached via the pipe 17. In the figure, reference numeral 41 denotes a temperature sensor for measuring the temperature of the heat transfer oil in the oil passage 35, and reference numeral 42 denotes a heat insulating material for keeping the temperature of the cylindrical mold body 3 warm.

The bottom of the cylindrical mold body 3 is fixed with a block-shaped fixing metal part 32 having an acute-angled tip via a heat insulating material 43, and is engaged with the claw part 31 of the lock mechanism part 5. That is, when the cylindrical mold body 3 is installed on the support 25, the fixing metal part 32 is housed in the valley 26 between the support pedestals 25, and then the claw 31 of the lock mechanism 5 is fixed to the fixing metal part 3.
Lock by contacting 2

The heat medium oil circulation device 6 includes a heating device for heating the heat medium oil put in the tank and a pump for circulating the heat medium oil. It is connected to the oil passages 38 and 25 of the medium oil.

Next, a method for producing a columnar cast polyamide resin molded article using the production apparatus according to the present invention will be described below. After the plurality of cylindrical mold bodies 3 are set on the support 25 of the transport trolley 2, and the fixing bracket 32 is accommodated in the valley 26 between the supports 25, the lock mechanism 5 is operated to operate the right-hand thread. By simultaneously rotating the screw 27 and the left screw 28, the claws 31 are moved in a direction approaching each other, and are locked by the fixing bracket 32 fixed to the bottom of the cylindrical mold body 3. At this time, the cylindrical mold body 3 and the heat medium oil circulation device 6 are connected via a pipe, and the heat medium oil is supplied from the heat medium oil circulation device 6 to the cylindrical mold body 3.
From the heat medium oil inlet 37 through the oil passage 38, and further from the heat medium oil inlet 40 through the oil path 35, and pass through the inside of the cylindrical mold body 3 from bottom to top to adjust the temperature to 130 to 190 ° C. And preheat.

After the traveling cart 7 is moved forward to move the cylindrical mold body 3 to a position near the pouring position 45 of the polymerizable lactam liquid, it is further moved by the carrier cart 2 in a direction perpendicular to this direction. The individual cylindrical mold bodies 3 can be brought closer to the casting position 45 of the polymerizable lactam liquid more accurately. Thereby, the polymerizable lactam liquid can be cast into the cylindrical mold body 3 whose temperature has been adjusted.

Thereafter, the polymerizable lactam liquid is poured into the cavities of the individual cylindrical mold bodies 3, and anion polymerization is performed in a state where the resin material with the protruding rod is inserted into the opening and closed.
The polymerization time is 20 to 100 minutes. When this is completed, the temperature of the cylindrical mold body 3 is lowered to the temperature at the time of preheating, and then the molded body can be released from the mold by pulling out the resin material by an operator. At this time, the cylindrical mold 3
Is fixed, so that the molded product can be easily removed from the mold.

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, a known ω-lactam polymerization catalyst such as sodium hydride, lithium hydride, sodium, potassium or the like 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 anionic 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 ω-lactam containing an anionic polymerization catalyst and 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, other than the above components, lubricants such as 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. It is possible.

[0025]

As described above, according to the first aspect of the present invention, the cylindrical mold body whose temperature can be adjusted is fixed to a predetermined position and moved to the casting position, and the polymerizable lactam liquid is contained therein. an apparatus for producing a columnar cast polyamide resin molded article cast and on the transport carriage that reciprocates in the predetermined direction
At least one or more mold setting parts are arranged in the
To some or all of the mold installation sections
Locking machine at the bottom of each cylindrical mold body that can adjust the degree
The position is fixed in the structure, and the manufacturing equipment of the columnar cast polyamide resin molded body equipped with a heat medium oil circulation device that controls the temperature of the heat medium oil and sends it to the cylindrical mold body. The position can be set accurately by fixing with the part, and the cylindrical mold can be accurately moved to the casting position of the polymerizable lactam liquid by the pallet, and the cylindrical mold can be prevented from falling down. .

According to a second aspect of the present invention, a lock mechanism is provided.
Are the claws screwed into the rotating right and left threads, respectively.
Move the part and fix it to the bottom of the cylindrical mold.
Since adapted engaged in tool portion, the effect can be completed to ensure early sticking to the transport carriage by accommodating the fixing bracket portion of the cylindrical molded bodies to valley between the support base is there.

According to the invention of claim 3 of the present application, the transport vehicle is installed on a traveling vehicle that reciprocates in a certain direction, and the traveling vehicle reciprocates in a direction intersecting the moving direction of the transport vehicle. There is an effect that the individual cylindrical molds fixed to the carrier can be quickly and accurately moved to the casting position of the polymerizable lactam liquid.

[Brief description of the drawings]

FIG. 1 is a plan view of the entire apparatus for manufacturing a columnar cast polyamide resin molded product according to the present invention; FIG.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of an AA part of FIG. 1;

FIG. 4 is a side view of a portion BB in FIG. 1;

FIG. 5 is an enlarged view of a portion C in FIG. 3;

FIG. 6 is an enlarged view of a part D in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Conveying trolley 3 Cylindrical mold body 4 Mold installation part 5 Lock mechanism part 6 Heat medium oil circulation device 7 Traveling trolley 10 Traverse device 14 Ball screw 15 Nut stand 25 Support stand 26 Valley 27 Right screw 28 Left screw 31 Claw Part 32 Fixing part

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-68914 (JP, A) JP-A-1-16614 (JP, A) JP-A-1-141914 (JP, A) JP-A-6-914 99440 (JP, A) JP-A-9-277263 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 39/02-39/08 B29C 39/22-39/38 B29C 33/00-33/04 B29C 33/34-33/36

Claims (3)

(57) [Claims] 1. A temperature-adjustable cylindrical mold body is fixed at a predetermined position and moved to a casting position, into which a polymerizable lactam liquid is cast to form a columnar cast polyamide resin molded body. In an apparatus to be manufactured , at least one or more mold setting sections are arranged on a transport carriage that reciprocates in a certain direction.
Place and mold all or part of the mold installation part
Bottom part of each cylindrical mold body that enables temperature adjustment in the installation part
Characterized by comprising a heating medium oil circulating device for fixing the position of the heating medium by a lock mechanism , controlling the temperature of the heating medium oil , and sending it to a cylindrical mold body. 2. The lock mechanism includes a rotating right screw part and a left screw part.
Move the claws screwed to the screw, respectively,
To be fixed to the fixing bracket provided at the bottom of the
The apparatus for producing a columnar cast polyamide resin molded product according to claim 1. 3. The column-shaped cast polyamide according to claim 1, wherein the transport trolley is mounted on a traveling trolley reciprocating in a certain direction, and the travel trolley reciprocates in a direction intersecting with the moving direction of the transport trolley. Equipment for manufacturing resin moldings.