KR20150088481A - Automatic assemblying device of wax pattern - Google Patents

Abstract

The present invention relates to an apparatus to automatically assemble a wax pattern and, more specifically, relates to an apparatus to automatically assemble a wax pattern capable of improving a working environment and increase productivity by automating a step of melting and attaching models of a first tray in a front and a rear side of a runner stacked in a second tray by providing the first tray wherein a plurality of wax models are stacked, and the second tray wherein one runner is stacked respectively. According to the present invention, the apparatus to automatically assemble a wax pattern comprises: a wax model supplying part to transfer and supply a first tray wherein a wax model is stacked through a first transfer path; a moving combination worktable installed in an upper part of the wax model supplying part, having lifting operation tongs to hold the wax model, and transfer the wax model to a wax model combining part; a re-transferring part to discharge the tray from which the wax model is separated from the wax model supplying part; a runner supplying part to transfer and supply a second tray wherein a runner is stacked to the wax model combining part; and the wax model combining part to heat and combine the runner and the wax model by the lifting operation tongs in the second tray supplied from the runner supplying part. In the wax model combining part, a finished product wherein the runner and the wax model are heated and combined is re-transferred to the tray through a second transfer path.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wax pattern automatic assembling apparatus,

The present invention relates to a wax pattern automatic assembling apparatus, and more particularly, to a wax pattern automatic assembling apparatus which supplies wax patterns of a first tray to a first tray on which a plurality of wax models are mounted and a second tray on which a runner is mounted, And more particularly, to a wax pattern automatic assembling apparatus capable of improving the productivity and improving the working environment by automating the melting process on the front and back surfaces of the wax pattern.

In general, the process order of the precision casting method using the lost wax method is ① wax pattern injection molding ② wax assembly ③ coating ④ di waxing ⑤ heating ⑥ casting ⑦ mold desizing ⑧ product cutting ⑨ gate polishing ⑩ additional heat treatment.

② In the wax assembly process, ① a lot of wax models produced in a wax pattern injection molding process are melted in a wax tree made of a sprue and a runner. Attaching and assembling work.

However, since the wax assembly process is manually performed by the operator, the work efficiency and productivity are lowered, and irregular adhesion of the wax model and melting range by the electric iron are not constant, so the precision of the cast product is lowered. In addition, since the wax model contains compounds such as Paraffin, Rosin, Glycerin, and Hydrogenerated castor oil, a large amount of smoke and gas generated during melting of the wax model due to electric iron causes bad effects on the workers.

As a related prior art, a wax tree to which a wax model is attached is disclosed in Japanese Patent No. 912098 (structure and assembly method of a tree for assembling wax patterns of a precision casting product), in which a molten metal is injected; A plurality of frames branched from the spout; The frame is formed with concavities and convexities formed on each of the frames. One to three engaging portions are formed on the front and back surfaces of the frame, and two to four irregularities having different shapes and sizes are formed on the engaging portions. And concave and convex portions are formed in the lower part of the gate of the wax model so that the wax pattern is attached to the frame in correspondence with the irregularities formed in the engaging portion of the frame.

However, in the prior art, the cost and inconvenience of forming the concavities and convexities in the frame and the wax model, respectively, are inconvenient. In addition, when the wax model is small or attached closely to the frame, it is difficult to form the concavo- The productivity is deteriorated because it has to be manually operated, and a torch lamp (flame) is used for the bonding part in order to easily attach the wax model. However, the problem that harmful substances generated while melting the wax model described above adversely affects workers Occurs.

As another prior art, Japanese Patent No. 860297 (a jig for assembling a wax pattern of a precision casting product) includes a support plate, a post standing upright on the support plate, a tree fastener on the ring passing through the post, Wherein the tree fastener is rotatable 360 degrees about the post in place and the tree coupled to the tree fastener is also 360 degrees rotatable at the engaged position.

However, the prior art described above is merely a fixture for manually attaching a wax model to a tree. The above-mentioned prior art also has a problem in that, due to the manual work of the worker, the problems of productivity deterioration and worker health deterioration due to harmful substances mentioned above are fundamentally solved I can not.

The present invention has been made to solve such a problem,

In precision casting wax pattern assembly process, many wax pattern and tree assembly process are automated to shorten the working time to increase the productivity, to increase the accuracy of the wax model attachment process, to minimize defective parts and to assemble the assembly process by unmanned {unmanned} system The present invention is directed to a wax pattern automatic assembling apparatus capable of enhancing the quality of a working environment since a large amount of harmful smoke and gas harmful as a wax model melts does not directly affect a worker.

The present invention relates to a wax model supply unit in which a first tray on which a wax model is loaded is conveyed and supplied through a first conveyance path and a wax model is installed on an upper portion of the wax model supply unit, A runner supply unit for transferring and supplying the second tray on which the runner is mounted by the wax model connection unit, a transfer unit for transferring the second tray on which the runner is loaded, A wax model engaging portion for heating and joining a runner and a wax model to the second tray supplied from the runner supplying portion to the elevating operation gripper, And the second conveying path is taken out through the second conveying path.

The first transfer path may include: A conveying and pressing member which is horizontally connected to the chain and rotates in the longitudinal direction at predetermined intervals and is brought into close contact with the lower transferring table of the first tray so as to be pressed and fed; And a first transfer connecting pin which is moved up and down to be fitted into the connection hole and is precisely transferred to the wax model supply unit along the first transferring thread.

The mobile bonding work table may further comprise: An upper frame installed in a form crossing the upper part of the wax model supply part and the upper part of the wax model connection part, a horizontal moving part moving along the horizontal screw rod installed in the upper frame, And a pair of holding plates for holding the wax model.

The conveying unit may further comprise: A first lifting plate on which a first tray separated from a wax model is transferred from a wax model supply unit, a first lifting and lowering operation member that allows the first lifting plate to be lifted and lowered by a cylinder, And a first inclined rail for transferring the lowered first tray to the first tray supply waiting section by the first plunger.

The runner supply unit may further comprise: A second raising plate disposed at a front end of the second railing rail in a conveying direction of the second railing rails to place a second tray thereon; A second plunger for moving the second tray lifted by the second lifting plate, and a second plunger for moving the second plunger in the conveying direction end of the second plunger, And a second feed connecting pin which is moved up and down to fit into the formed connection hole and is precisely conveyed to the wax model attaching portion along the second feed screw.

The wax model engaging portion may include: A heating section for melting the top surface of the runner placed on the second tray and a bottom surface of the wax model to be supplied downward by the elevating operation tongs, a runner reversing device for reversing the runner by 180 ° to combine the wax pattern on the bottom surface of the runner .

The heating unit may further include: A heating plate elastically supported on the vertical support by a spring and heated by the heating wire at one side of the heating body and formed horizontally and a forward and backward cylinder for moving the heating plate forward and backward.

The runner inversion unit may further comprise: An inverting connector formed at a counterbore of a support shaft formed at one side of the runner, and an inverting operation including an inverting rotating body and a supporting shaft connected to the inverting connector and inverted, And a connection portion provided on both sides so that the support shaft is connected to the support shaft of the runner and the coupling portion of the opposite reverse rotation body is connected to the inverting connector A cylinder, and a secondary up / down operation unit for moving the reversing operation unit upward to separate the runner from the upper side of the second tray.

The present invention has the effect of automating the assembling process of a large number of wax patterns and a tree in a wax pattern assembling process of a precision casting to shorten the working time, thereby increasing the productivity and increasing the precision of the attaching process of the wax model, thereby minimizing defective products.

Also, since the assembling process is an unmanned (unmanned) system, a large amount of smoke and gas harmful that occur when the wax model is melted does not directly affect the worker, thereby improving the quality of the work environment.

1 is a perspective view showing a configuration of a wax pattern automatic assembling apparatus according to the present invention.
Fig. 2 is a front view showing a configuration of the present invention and a first conveying path. Fig.
3 is a plan view showing a configuration of the present invention.
4 is a side view showing a configuration of the present invention;
5 is a view showing a wax model supply unit and a lifting operation gripper of the present invention.
6 is a view showing a configuration of a carry section according to the present invention.
FIG. 7 is a perspective view showing a movable binding workbench of the present invention. FIG.
8 is a view showing a configuration of a runner supply unit according to the present invention.
Figs. 9 to 12 show the melting process of the supplying and heating parts to the wax model attaching part through the lifting operation grippers of the present invention. Fig.
13 to 15 are partially enlarged views showing the melting and bonding process through the heating portion of the present invention.
16 is a diagram showing a configuration of a runner inversion section according to the present invention.
17 to 18 are perspective views showing the operation of the runner half of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Conventionally, in the wax assembly process of precision casting, a worker directly holds an electric iron dispenser by hand and melts the attachment portions of a plurality of wax models one by one and attaches them to the runners at regular intervals. This conventional method of attaching is not effective in productivity because it takes a long time for assembling and requires a high degree of proficiency because a person manually performs each work, and harmful substances generated while melting the wax model adversely affect workers .

The present invention is characterized in that a first tray 10 on which a plurality of wax patterns 10a are loaded and a second tray 20 on which one runner 20a is loaded are respectively supplied to the wax models 10a To the front and back surfaces of the runners 20a loaded on the second tray 20 to produce an article.

As shown in FIGS. 1 to 4, the automatic wax pattern assembling apparatus of the present invention is a wax pattern automatic assembling apparatus in which a first tray 10 on which a wax pattern 10a is loaded is conveyed through a first conveying path 110, (200) which is installed on the upper part of the wax model supplying part (100) and is equipped with a lifting operation gripper (240) to carry the wax model (10a) and transfer it to the wax model connecting part A transfer unit 300 for discharging the tray from which the wax model 10a has been removed from the wax model supply unit 100 and a transfer unit 300 for discharging the tray from which the runner 20a is loaded by the wax model connection unit 500. [ A runner 20a and a wax model 10a are mounted on a second tray 20 supplied from the runner supplying part 400 to a lifting operation tongue 240 A wax model engaging portion 500 for allowing the wax model engaging portion 500 to perform heating and engagement, 20a and the wax model 10a are heated and combined to be discharged through the second transfer path 800. [

The first conveying portion of the present invention comprises: When the first trays 10 stacked with the wax patterns 10a are fed in a row, the conveying pressing pieces 111, which are horizontally connected to one lower side of the first tray 10 and are arranged at regular intervals in a chain rotated by the motor in the longitudinal direction, The transfer pads 11 formed on the tray 10 are closely contacted and pressed and inserted into the connection holes 12 formed on the bottom surface of the first tray 10 at the end of the conveying pushing piece 111 in the traveling direction And a first transfer connection pin 130 which is moved up and down by a cylinder so as to be precisely transferred to the wax model supply unit 100 along the first screw thread.

The first conveying connection pin 130 is connected to the first conveying connection pin 130 in the form of a normal ball screw, while the first conveying connection pin 130 is rotated at a relatively high speed by the motor and the chain. The swing arm 120 is slowly rotated by the motor so that the swing arm 120 can be precisely moved. Therefore, the lift operation gripper 240, which will be described later, can be held in the movable binding workbench 200 to pinch the wax model 10a at an accurate position.

As shown in FIGS. 3 to 5, the mobile bonding workbench 200 of the present invention includes an upper frame 210 installed to cross the upper part of the wax model supplying unit 100 and the wax model connecting unit 500, A horizontal moving bar 230 that moves along the horizontal barb 220 installed on the upper frame 210 and a vertical bar 230 that is vertically movable up and down by the cylinder, And a pair of holding plates 241 for holding the wax model 10a by a cylinder.

The movable binding table 200 lifts up the plurality of wax patterns 10a stacked on the first tray 10 of the wax model feeding unit 100 with the elevating operation grippers 240 in a sandwich state, The lifting operation forceps 240 is horizontally moved to the wax model engaging part 500 along the horizontal barb 220 and the guide bar, and is heated and coupled as described later.

The carry section (300) of the present invention comprises: The wax model 10a is placed in a supply waiting area so that the first tray 10 in a state in which the wax model 10a is separated after being subjected to the wax combining process in the wax model supplying unit 100 can be discharged and recycled, A first lifting plate 310 to which the first tray 10 separated from the wax model 10a is transferred and to which the first lifting plate 310 is lifted by the cylinder, The first tray 10 is lowered by the first lifting plate 310 to the first tray supply standby portion 341 by the first plunger 330, And a rail 340.

Since the first inclined rail 340 is inclined in the direction of the first tray supply stand 341, the first tray 10 placed on the first lift plate 310 is connected to the first inclined rail 340, (330), it is lowered by its own weight. The worker loads the first tray 10 used in the first tray supply standby portion 341 again and sends the wax pattern 10a to the wax pattern 10a through the first conveyance route 110 Since the processes of supplying, assembling, and conveying the first tray 10 are repeatedly circulated, it can be said that it is effective for the work line and the work efficiency of the worker.

The runner supply part (400) of the present invention comprises: A second slope rail 410 and a second slope rail 410 are provided at the leading end of the second slope rail 410 in the conveying direction so that the second trays 20 are arranged in a line and fed and fed. A second lifting and lowering member 420 and a second lifting and lowering member 430 for lifting and lowering the second lifting and lowering plate 420 and a second lifting and lowering member 420 lifted by the second lifting and lowering plate 420, And a connecting hole 22 formed at the lower bottom surface of the second tray 20 at the end of the conveying direction of the second platen 440. The second plunger 440 is moved up and down, And a second conveyance connecting pin 460 which is precisely conveyed to the wax model engaging part 500 along the conveying screw rod 450.

The second inclined rail 410 is inclined in a direction opposite to the first inclined rail 340 and the second inclined rail 410 is formed by a stopper 411 in a state where a large number of second trays 20 are placed It is in a stopped state. At this time, when the second tray 20 is to be supplied to the wax model connection unit 500, the second lift plate 420 is moved to the second slope rail 410 through the second lift operation member 430 including the motor and the ball screw The stopper 411 is released and one second tray 20 is placed on the upper surface of the second lifting plate 420. As a result, The second lifting plate 420 is then lifted up and the second tray 20 is moved from the second lifting plate 420 to the wax model engaging portion 500 through the second plunger 440 made of a cylinder The second transfer connection pin 460 moves to the correct position of the wax model engaging part 500. [

The second transfer connecting pin 460 is rotated by the motor so that the second transfer screw rod 450 can be moved precisely like the first transfer connecting pin 130. Therefore, So that the wax model 10a can melt-bond to the correct position of the runner 20a.

The wax model joining part 500 of the present invention includes: A heating unit 600 for melting and heating the upper surface of the runner 20a placed on the second tray 20 and the lower surface of the wax pattern 10a supplied to the lowering operation tongue 240, And a runner inverting part 700 for inverting the inverted 180 ° downward to engage the wax model 10a on the bottom surface of the runner 20a.

The heating unit 600 includes: A heating plate 620 fitted to the vertical support 611 and elastically supported by a spring 612 and having a heating body 610 and a heating body 620 heated at one side of the heating body 610 by a heating wire and horizontally formed, 620 are moved forward and backward. The heating plate 620 and the forward and backward cylinders 630 are spaced apart from the floor by a spring 612 together with the heating body 610 and the heating plate 620 is mounted on the second tray 20 And does not directly contact the runner 20a but is located at an upper portion of about 5 mm.

When the heating plate 620 of the heating unit 600 is spaced apart from the runner 20a and the wax model 10a held by the lifting operation gripper 240 comes to the same position, The wax model 10a descends by pressing the heating plate 620 and the lowered heating plate 620 melts by heating the bottom portion of the wax pattern 10a and the upper surface portion of the runner 20a simultaneously for several seconds. At this time, the heating body 610 compresses the spring 612 of the vertical support 611 during the pressing time of the elevating operation tongs 240, and when the elevating operation tongs 240 are lifted vertically The heating plate 620 is lifted by the spring 612 and the wax model 10a is pressed vertically by the lifting operation grippers 240 while the heating plate 620 is moved backward by the forward and backward cylinders 630, The wax pattern 10a and the runner 20a which have undergone the process are attached to each other.

The runner inversion unit 700 includes: An inverting connector 20c formed on the opposite tongue of the support shaft 20b formed on one side of the runner 20a and an inverting rotating body 711 connected to the inverting connector 20c for inverting the inverting connector 711 and supporting shaft 712 And the inverting operation unit 710 is provided with the inverting operation unit 710 so that the inverting operation unit 710 is elevated first so that the engaging part of the inverting rotating unit 711 is placed on the same horizontal line as the inverting connection unit 20c The lifting operation portion 730 and the support shaft 712 are connected to the support shaft 20b of the runner 20a and the coupling portion of the opposite reverse rotation body 711 is connected to the reverse coupling 20c. A connecting cylinder 720 and a secondary up and down operation unit 740 for raising the reverse operation base 710 to separate the runner 20a from the upper side of the second tray 20. [

The runner inverting unit 700 has a configuration for inverting the runner 20a by 180 ° so as to connect the wax model 10a to the bottom surface of the runner 20a, And when the wax model 10a is coupled to the upper surface of the runner 20a, when the worker comes to the work position of the runner inverting part 700 by the second transfer connecting pin 460, the runner 20a is projected from the opening at the bottom, Is reversed by 180 ° and then loaded on the second tray 20 and then moved to the wax model joining part 500 by the second transfer connecting pin 460. After the melt bonding process is performed again, the upper surface of the runner 20a The finished product is produced in a state where the wax model 10a is combined with the bottom product, and the finished product is taken out through the second transfer path 800.

The present invention having the above-described structure is performed as follows.

When the first trays 10 stacked with the wax pattern 10a are fed in a row through the first conveyance part 110 of the present invention, the first tray 10 (11) and is conveyed under pressure. At this time, the first feed connection pin 130 is inserted into the connection hole 12 of the first tray 10 at the position where the feed by the feed pressing piece is finished and is precisely moved to the wax model feeder 100.

The second tray 20 on which the runner 20a is loaded is supplied through the runner feeder 400 while the first tray 10 is moved to the wax model feeder 100, When the second lift plate 420 is lowered to the front end of the second slope rail 410 while the plurality of second trays 20 are stopped by the stopper 411 in a state where a plurality of the second trays 20 are placed on the stopper 411 The second tray 20 is lifted up on the upper surface of the second lifting plate 420 and the second lifting plate 420 is lifted up by the second lifting operation member 430, The second tray 20 is moved to the wax model engaging portion 500 through the push rod 440. The second tray 20 is brought to the correct position of the wax model engaging portion 500 through the second conveyance connecting pin 460 which is inserted into the connecting hole of the second tray 20.

When the first tray 10 and the second tray 20 are respectively supplied to the lower portion of the movable bonding workbench 200 as described above, the wax model 10a of the first tray 10 is transferred to the elevating operation tongs 240, When the elevating operation tongue 240 moves horizontally to the wax model engaging portion 500 and comes to the position of the heating plate 620 along the horizontal thread bar 220 and the guide bar, The wax model 10a is lowered together with the heating plate 620 while the operation forceps 240 is vertically lowered and the lower heating plate 620 is moved downward simultaneously with the lower face portion of the wax pattern 10a and the upper face portion of the runner 20a And is melted by heating for several seconds. When the melting process is performed and the lifting operation clamp 240 is vertically lifted, the heating plate 620 is lifted by the spring 612, and the melting process is terminated.

The wax model 10a is pressed vertically by the lifting operation grippers 240 in a state where the heating plate 620 is moved backward by the forward and backward cylinders 630 of the heating unit 600, The wax model 10a and the runner 20a are attached to each other. This attaching process is repeated until a plurality of wax patterns 10a are assembled to the runner 20a in a pattern form, and the joining process is repeated until the position of the wax pattern 10a and the joining position of the runner 20a The first transfer connection pin 130 and the second transfer connection pin 460 are continuously and accurately moved.

When the wax pattern 10a is coupled to the upper surface of the runner 20a in a pattern form, the runner 20a is rotated 180 degrees upward and downward through the runner inverting unit 700 provided at the rear end of the second feed connection pin 460. [ The wax model 10a is coupled to the bottom of the runner 20a by reversing the direction of rotation of the runner 20a. The runner 20a protrudes from the bottom opening at the rear end of the wax model engaging part 500, 20 and then moved back to the wax model joining part 500 by the second transfer connecting pin 460. The wax model 10a is finally transferred to the upper and lower surfaces of the runner 20a through the melt bonding process, The finished product is produced in a combined state, and the produced finished product is taken out through the second transfer path 800.

The first tray 10 having the wax pattern separated from the first tray 10 is pushed by the first tray 10 to be placed on the first lift plate 310 and the first lift operation member 320 The worker is again aligned with the first tray feed standby portion 341 along the first inclined rail 340 by the first bend 330 so that the worker again feeds the wax pattern to the first conveying path 110 to supply, The processes of conveyance are subjected to an iterative circulation process.

The above processes are automated through a proximity sensor (not shown) and a control unit (not shown), and this is a technique according to an ordinary automation facility, and thus a detailed description thereof will be omitted.

While the present invention has been described with reference to the exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

10: first tray 10a: wax model
11: Feed tray 20: Second tray
20a: Runner 20b: Support shaft
20c: inverting connector 12, 22: connecting hole
100: wax model supply unit 110: first transfer route
111: Feed pressure piece 120: First feed screw bar
130: first transfer connecting pin 200: movable transfer table
210: upper frame 220: horizontal barb
230: horizontal moving bar 240: elevating operation tongs
The first raising and lowering operation member includes a first rake member and a second rake member. The first rake member includes a first rake member and a second rake member. 411: Stopper
420: second lift plate 430: second lift operation member
440: second plunger 450: second plunger bar
460: second transfer connecting pin 500: wax model connecting part
600: a heating unit 610: a heating body
611: vertical support 612: spring
620: heating plate 630: forward / backward cylinder
700: runner inverse 710: inverse operation
711: Inverse rotation body 712: Support shaft
720: connecting cylinder 730: primary lift operation part
740: second lift operation part 800: second movement route

Claims (8)

A wax model supply unit 100 in which the first tray 10 on which the wax model 10a is loaded is conveyed and supplied through the first conveyance passage 110,
A movable bonding workbench 200 mounted on the wax model supplying part 100 and equipped with a lifting operation gripper 240 for holding the wax model 10a and transferring the wax model 10a to the wax model combining part 500,
A transfer unit 300 for discharging the wax model 10a from the wax model supply unit 100,
A runner supply part 400 for transferring and feeding the second tray 20 on which the runner 20a is loaded to the wax model engaging part 500,
A wax model engaging part 500 for heating and coupling the runner 20a and the wax model 10a to the second tray 20 supplied from the runner supplying part 400 by the elevating operation tongs 240,
And the finished product heated and combined with the runner (20a) and the wax pattern (10a) is delivered to the tray through the second conveyance path (800) in the wax pattern engaging part (500).
The method of claim 1, wherein
The first conveying path (110) includes: A conveying pressing piece 111 which is horizontally connected to the chain and which is installed at a predetermined interval in a chain which is rotated in the longitudinal direction and which is pressed against the lower conveying belt 11 of the first tray 10 to be conveyed under pressure, The first tray 10 is moved up and down to be inserted into the connection hole 12 formed in the lower bottom surface of the first tray 10 and is precisely conveyed to the wax model supply unit 100 along the first conveying screw rod 120 1 transfer connection pin (130).
The method according to claim 1,
The movable joining workbench 200 includes: The upper frame 210 is installed to cross the upper part of the wax model supplying part 100 and the upper part of the wax model connecting part 500. The upper frame 210 horizontally moves along the horizontal screw rod 220 installed on the upper frame 210. [ And a lifting operation tongue 240 having a movable table 230 and a pair of pinching plates 241 mounted on the movable table and formed in a rectangular shape to hold the wax model 10a The wax pattern automatically assembling device.
The method according to claim 1,
The transport unit 300 includes: A first lift plate 310 to which a first tray 10 having a wax model 10a separated therefrom is transported and a second lift plate 310 to which the first lift plate 310 can be moved up and down by a cylinder And the first tray 10 lowered by the first lifting plate 310 is transported to the first tray supply standby portion 341 by the first plunger 330 And a first inclined rail (340) for guiding the wax pattern. The method according to claim 1,
The runner supply unit 400 includes: A second slope rail 410 and a second slope rail 410 are provided at the leading end of the second slope rail 410 in the conveying direction so that the second trays 20 are arranged in a line and fed and fed. A second lifting and lowering member 420 and a second lifting and lowering member 430 for lifting and lowering the second lifting and lowering plate 420 and a second lifting and lowering member 420 lifted by the second lifting and lowering plate 420, And a connecting hole 22 formed at the lower bottom surface of the second tray 20 at the end of the conveying direction of the second platen 440. The second plunger 440 is moved up and down, And a second conveyance connecting pin (460) for conveying the wax pattern to the wax pattern engaging part (500) along the conveying screw rod (450).
The method according to claim 1,
The wax model engaging portion 500 includes: A heating unit 600 for melting and heating the upper surface of the runner 20a placed on the second tray 20 and the lower surface of the wax pattern 10a supplied to the lowering operation tongue 240, And a runner inverting unit (700) for inverting the rotation of the wax pattern (10) by 180 ° so that the wax pattern (10a) is engaged with the bottom surface of the runner (20a).
The method of claim 6, wherein
The heating unit 600 includes: A heating plate 620 which is elastically supported by a spring 612 on a vertical support 611 and is heated by an electric heating line on one side of the heating body 610 and horizontally formed on the heating body 610, And the front and rear cylinders 630 are moved forward and backward.
The method according to claim 6,
The runner inversion unit 700 includes: An inverting connector 20c formed on the opposite tongue of the support shaft 20b formed on one side of the runner 20a and an inverting rotating body 711 connected to the inverting connector 20c for inverting the inverting connector 711 and supporting shaft 712 And the inverting operation unit 710 is provided with the inverting operation unit 710 so that the inverting operation unit 710 is elevated first so that the engaging part of the inverting rotating unit 711 is placed on the same horizontal line as the inverting connection unit 20c The lifting operation portion 730 and the support shaft 712 are connected to the support shaft 20b of the runner 20a and the coupling portion of the opposite reverse rotation body 711 is connected to the reverse coupling 20c. And a second lifting and lowering operation part (740) for lifting the reversing operation table (710) and separating the runner (20a) to the upper side of the second tray (20) Automatic assembly device.

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