JPH01297223A - Powder slash molding apparatus - Google Patents

Abstract

PURPOSE:To enhance productivity, by constituting a powder slash molding apparatus of at least three slash molds, a guide part, a forward truck, a rearward truck and respective stations of demolding, cooling, heating and material supply. CONSTITUTION:The slash mold S1 after the process in a demolding station 4 is fed to a heating station 6 by a forward truck 2 and, after heating, the heated slash mold S1 is delivered to a rearward truck 3 from the heating station 6 to be fed to a material supply station 7 to perform the charge and recovery of the material of the slash mold S1. Thereafter, the slash mold S1 is fed to a cooling station 5 by the rearward truck 3. After cooling, the slash mold S1 is fed to the demolding station 4 by the forward truck 2 and a product is demolded to complete one cycle. That is, the forward truck 2 moves from the demolding station 4 to the heating station 6 while the rearward truck 3 moves from the cooling station 5 to the material supply station 7. When three slash molds S1, S2, S3 are sent in at a predetermined time interval, the forward and rearward trucks 2, 3 repeat same operation three times during one cycle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in powder slush molding Raff. Powder slush molding is a molding method that allows sophisticated designs through mold surface transfer, larger sizes, and cost reductions due to improved yield, and is used in the production of the skin of vehicle interior materials.

[Prior art] Conventionally, a powder slush material such as vinyl chloride resin is used, the powder slush material is brought into contact with a heated mold surface, and the powder slush material is melted and adhered on the mold surface to form a constant film. Powder slush molding is used in practice to form a thick molten plasticized polyvinyl chloride resin film and then cool the polyvinyl chloride resin to obtain a film-like molded body.

A typical powder slush molding device used for this kind of molding is a slush mold (electroformed mold made of Ni, Cu, etc.) with a copper pipe bonded to the back surface through which heating oil and cooling oil flow, and a slush mold that is connected to the copper pipe. It is equipped with a heating device and a cooling device that circulate heated oil and cooling oil, and a swing vJ device that rotates and swings the openings of the slash mold and material box facing each other in order to input and collect materials. Tokukai 1986
-157818, Japanese Utility Model Publication No. 168915/1983, Japanese Patent Publication No. 55756/1986, etc.).

[Problems to be Solved by the Invention] In the conventional powder slush molding apparatus, one product is manufactured by sequentially performing processing steps by each apparatus on one slush mold. . That is, a heating process in which the slush mold is heated by a heating device, a material supply process in which material is supplied to the slush mold by a rocking device, a cooling process in which the slush mold is cooled by a cooling device, and a formed body is separated from the slush mold. Perform the demolding process in order. For this reason, it takes approximately 3 to 1
There is a problem that it takes 0 minutes (varies depending on the heating/cooling capacity) and the productivity is extremely low.

The present invention was devised in view of the above circumstances, and its purpose is to provide a powder slush molding apparatus with excellent productivity.

[Means for Solving the Problems] The powder slush molding apparatus of the present invention includes at least three slush molds, a linearly extending guide portion for conveying the slush molds, and a guide portion that A front truck and a rear truck that are guided and always located in the front and back direction of the guide section, and a demolding station, a cooling station, a heating station, and a material supply station that are arranged along the guide section and behind the front of the guide section. It is characterized by the following.

[Operation] In the powder slush molding apparatus of the present invention, the slush mold that has completed the process at the demolding station is transported to the heating station by the front truck.

After heating, the slush mold is transferred from the heating station to the rear truck and transported to the material supply station, where materials are loaded into and collected from the slush mold. The slush type is transported to the cooling station by the rear truck. After cooling, the slush mold is transported by the front truck to a demolding station, where it is molded into a product and completes one cycle. That is, the front truck moves between the demolding station and the heating station, and the rear truck moves between the cooling station and the material supply station.

If three slash molds are sent at predetermined time intervals, the front truck and rear truck will repeat the same operation three times during the one cycle. As a result, during one cycle, three slush molds are sequentially transported to four separate and independent stations by the two carts, the front cart and the rear cart. All movement of both carts is under program control, and there is no risk of interference between the two carts.

[Example] Hereinafter, specific examples of the powder slush molding apparatus of the present invention will be described based on the drawings. FIG. 1 is a side view schematically showing the schematic configuration of the powder slush molding apparatus of this embodiment.

As shown in FIG. 1, powder slush molding 1 of this example
ffi includes three slash dies S1 to S3, a guide section 1, a front truck 2, a rear truck 3, a demolding station 4, a cooling station 5, a heating station 6,
The main component is a material supply station 7.

The three slash molds 81 to S3 are metal electroforming molds having a mold surface of a predetermined shape formed in a concave shape on the negative surface thereof,
Seven flange portions for being held are formed around the open surface. Three slush molds 81 to S3 are arbitrarily selected depending on the product to be manufactured.

The guide section 1 is made up of two running rails arranged in parallel with a predetermined interval, and supports and guides the front truck 2 and the rear truck 3. This guide section 1 is provided horizontally above each station arranged in a line from the demolding station 4 to the material supply station 7, which will be described.

The front truck 2 is for transporting the slash dies 81 to S3 by holding them thereunder, and is placed on the two running rails of the guide section 1 and disposed on the front side of the guide section 1. As the side view of the front truck 2 is shown in FIG.
Four running wheels 21, a transmission 22, a drive motor 23 that drives the running wheels 21 via the transmission 22, a clamper 25 that is provided at the lower part of the truck body and clamps the slash molds 81 to S3, Hydraulic pressure 5A to operate the clamper 25
26.

The rear truck 3 is for transporting the slash molds 81 to S3 by holding them thereunder, and is placed on the two running rails of the guide section 1 and disposed on the rear side of the guide section 1. This rear truck 3 has the same specifications as the front truck 2, and includes four running wheels 31, a transmission 32, a truck drive motor 33, a clamper 35, and a hydraulic pressure 1i1f36 (second (see figure).

Note that the drive of the rear truck 3 and the front truck 2 is
- data 23.33 and hydraulic system 26.36 are code 2
It is electrically connected to the III 111 section (not shown) via 7.37, and is operated under program control.

The demolding station 4 is installed at the forwardmost position along the guide part 1, and is a station for demolding the molded product after completing the process at the cooling station 5, and performs the final process of powder slush molding. Configure. As shown in FIG. 1, this demolding station 4 includes a base 40 and a base 40.
It is provided with an elevating lifter 43 which is fixed at 0 and moves the slash molds 81 to S3 up and down in the vertical direction, and a mold rotation device 45 which is provided on the elevating lifter 43 and rotates the slash molds 81 to S3.

As shown in FIG. 3 as a side view and FIG. 4 as a front view, the elevating lifter 43 includes a pair of left and right hydraulic cylinder units @431 that are spaced apart in the width direction and stand upright on the base 40.
has. The piston rod 431a of each hydraulic cylinder device [431] is vertically slidable by a hydraulic drive unit (not shown), and its upper end is connected to the movable base 431.
Fixed. Each movable base 432 is slidably held by lifter guides 433 provided on both sides of each piston rod 431a in parallel.

Further, between the pair of hydraulic cylinder devices 431, a rack and binion mechanism (not shown) installed at the lower part thereof,
A synchronization bar 436 is connected via a transmission belt 435 or the like, thereby synchronizing the operations of the hydraulic cylinder device 431.

Mold rotation g! The position 45 includes a pair of reversal drive parts 451 provided inside each movable base 432, and a reversal drive part 451.
and a mold clamping part 453 which is provided facing each other and clamps the slash molds 81 to S3. A pair of reversing drive units 45
1 are provided so as to be movable in mutually advancing and retracting directions by a drive section (not shown), and rotatable in a direction for vertically inverting the slash molds 81 to S3 held by a mold holding section 453.

It should be noted that in this demolding station 4, a worker A who performs demolding work is placed at a predetermined position (see FIG. 1).

The cooling station 5 is disposed next to the demolding station 4 from the front to the rear of the guide section 1, and is a station for cooling and solidifying the molten powder material after completing the process at the material supply station 7. It is. As shown in FIG. 1, this cooling station 5 includes a base 50,
Temperature control water 5 for cooling slush type 81~$3
37, a first lifter 55 that guides the slush molds 81 to S3 into the cooling water tank 53, and a first mold reversing device M that clamps and inverts the slush molds 81 to S3.
57.

As shown in a cross-sectional view in FIG. 5, the cooling water tank 53 consists of a main tank 533 and a sub-tank 535 separated by a partition plate 531, and is box-shaped with an open top. Main tank 533 and sub tank 53
5 are connected to each other at their side bottoms by connecting pipes 534 disposed around them. The communication pipe 534 includes
A pump device (not shown) is provided, and the temperature-controlled water 537 that overflows from the main tank 533 to the sub tank 535 over the partition plate 531 and flows into the flow via 538 is returned to the main tank 533 by the pump device. It is designed to circulate between both tanks. A nozzle portion 534a is provided in a portion of the connecting vibrator 534 extending into the main tank 533. The nozzle portion 534a jets out the temperature-controlled water 537 from a large number of holes and agitates the temperature-controlled water 537 in the main tank 533. Note that the communication vibe 534 is provided with a cooling device ff (not shown) that maintains the circulating temperature-adjusted water 537 at a temperature of 60 to 80°C.

As shown in FIG. 6 as a side view and as shown in FIG. 7 as a front view of one side, the first lifter 55 has a pair of left and right hydraulic pressure units that are spaced apart in the width direction and stand upright on the base 50. It has a cylinder device 551. The piston rod 551a of each hydraulic cylinder device 551 is vertically slidable and has its upper end fixed to the movable base 552. Each movable base 552 is provided parallel to each piston rod 551a on both sides thereof, or is slidably held by a lid guide 554. Additionally, a pair of hydraulic cylinder devices 551
In the darkness, a synchronization bar 456 is connected via a rack and pinion mechanism (not shown) attached to each, a transmission belt 455, etc.
are connected, which allows the hydraulic cylinder system W551
The operations of the two are synchronized.

The first type inversion 1i157 includes a pair of inversion shaft parts 571 coaxially provided on each movable base 552 of the first lifter 55,
It consists of a clamp part 573 that is provided at the inner tip of the reversing shaft part 571 to face each other and clamps the slash molds 81 to S3. The pair of reversing shaft parts 571 can be slid in mutually advancing and retracting directions by a driving part (not shown) provided in the movable base part 552, and can also vertically invert the slash molds 81 to S3 held by the clamp part 573. possible.

The heating station 6 is disposed on the rear side of the cooling station 5, and is a station for preheating the slush molds 81 to S3 conveyed from the demolding station 4. This heating station 6, as shown in FIG. 2 lifter 63 and a second type reversing device 65 that clamps and reverses the slash molds 81 to S3.
It is equipped with

The fluidized bed furnace 61 is box-shaped with an open top, as shown in a sectional view in FIG.

This fluidized bed furnace 61 consists of an upper heating tank 614 and a lower air blowing chamber 6 which are vertically divided by a fluidized plate 612 in which a large number of air blowing holes 612a are formed at predetermined intervals.
It consists of 16. Heating! Heat medium sand (glass peas, zircon sand, aluminum peas, etc.) (not shown) is put in 614, and this heat medium sand is heated to 300 to 350 ℃
is heated to a temperature of In addition, the air blowing chamber 616 is
It has a blower (not shown) that blows air from the air blowing holes 612a of the fluidizing plate 612 to make the heat medium sand in a fluidized state.

Note that the second lifter 63 and the second type reversing device 65 have the same specifications as the first lifter 55 and the first type reversing @@57.

The material supply station 7 is disposed on the rear side of the heating station 6 and is a station for supplying materials to the slush molds 81 to S3 transported from the heating station 6. This material supply station 7 is
As shown in FIG. 1, the base 70 and the slash molds 81 to
A guide lifter 71 that guides S3 to a predetermined position, a swinging bag W173 that holds and swings the slash molds S1 to S3 together with the material box, and three material boxes 75 into which powder materials are charged.
, a turntable 77 on which the material box 75 is placed, and a predetermined material box 75 on the turntable 77 into a slash mold 8
1 to S3, and a scissor lift 79 to be combined with S1 to S3.

The guide lifter 71, as shown in the front view in FIG.
A pair of left and right hydraulic cylinder devices 1711 are provided upright on the base 70 at intervals in the width direction. The piston rod 711a of each hydraulic cylinder device 711 is slidable in the vertical direction, and its upper end is connected to the movable base 71.
It is fixed at 2. Each movable base 712 is provided on both sides of each piston rod 711a in parallel with each other, and a lid is slidably held on an id 714. Further, each movable base 712 is provided with a clamp portion 715 that is mounted so as to be movable forward and backward so as to face each other and clamp the slash molds 81 to S3. And a pair of hydraulic cylinders [1711
A synchronization bar 718 connected via a transmission belt 717 or the like is provided between them.

The rocking device 73, as shown in a plan view in FIG.
A frame body 731 that is arranged approximately in the center of the material supply station 7 and arranges the openings of the slash type S go-S3 and the material box 75 to face each other, and a pair of swing shafts that are coaxially fixed on both left and right sides of the frame body 731. 733, a pair of swinging parts 735 that are provided on each base 70 and swing the swinging shafts 733, and a drive motor 737 that drives the swinging parts 735. Frame body 7
31 includes a fixing bin 732a and a material box 7 for positioning and fixing the seven flange parts of the slash molds 81 to S3.
Fixed pin 7 for positioning and fixing the flange part of 5
32b are provided, six on each side in the front and rear directions, for a total of twelve.

The material box 75 is box-shaped and has an opening on one side that is approximately the same size as the openings of the slush molds 81 to S3, and three material boxes 75 containing powder materials are prepared.

Note that powder material for 20 to 30 times is put into each material box 75 at one time.

The turntable 77, as shown in a plan view in FIG. 11, is a disc-shaped member that rotates on a horizontal plane about a rotating shaft 771 in the direction of arrow a in the figure by 120'. The turntable 77 is provided with a total of three elongated holes 773 that are slightly smaller than the bottom surface of the material box 75 at intervals of 120', and one elongated hole 773 is stopped at a position directly below the frame 731. It is supposed to be done. Also, turntable 77
, there is a long hole 773 on the upstream side of the position directly below the frame body 731.
A loading device H776 for loading the material box 75 loaded with powder material, and a loading device H776 for loading the empty material box 75 from above the elongated hole 773 on the downstream side of the position directly below the frame body 731. A bag f1777 is provided.

The scissor lift 79 is disposed below the turntable 77 and directly below the frame 731.

This scissor lift 79 is connected to the elongated hole 7 of the turntable 77.
It has a lift rod 791 that penetrates through the material box 73 and pushes up the bottom of the material box 75 to unite its flange portion with the frame 731.

In addition, on the rear side of the material supply station 7, there is a slash mold S that is not currently used or that will be used in the next molding operation.
A setup zone 8 for preparing 4 is provided. This replacement of the setup zone 8 with the slash type S4 is automatically performed by the rear truck 3 in response to an instruction (mental input) from the operator A.

Next, the operation of the powder slush molding apparatus of this embodiment will be explained. FIG. 12 is a timing chart showing the operating state of the powder slush molding device 4 of this embodiment. here 3
The operation of the first slash type S1 will be explained as a representative of the slash types 81 to S3.

The slush die S1 that has completed the demolding work at the demolding station 4 has its flange part transferred to the mold opening [45 of the mold clamping part 4].
53, with the mold surface facing sideways. From this state, change the mold mouth W! It is rotated by 90 degrees at t45 so that the mold surface is directed downward, and the lid 43 is opened as it is.
The receiver is lifted up and passed to the clamper 25 of the front truck 2 waiting above. Next, the truck driving motor 23 of the front truck *2 is started, and the running wheels 21 are rotated via the transmission 22, whereby the front truck 2 travels while being guided by the guide section 1 and moves the slush mold S1 to the heating station 6. Transport to. When the front truck 2 reaches above the heating station 6, the second lifter 63 rises, the second type reversing device 65 clamps the flange portion of the slush mold S1, and the slush mold S1 is received from the clamper 25 of the front truck 2. I'll take it. The second lifter 63, which received the slash type $1, is attached to the slash type S
1 is flipped upside down and then goes down. By this descent, the slush mold S1 is immersed in the heat medium sand in the fluidized bed furnace 61, where it is heated to about 230 to 250°C. After heating, the second lifter 63 rises, and the slash mold S1 travels to above the pattern that has been vertically reversed by the second type reversing device 65, and is transferred to the waiting clamper 35 of the rear truck 3. The rear truck 3 is guided by the guide section 1 and transports the slush mold S1 to the material supply station 7. Here, the guide lifter 71 of the material supply station 7 rises and clamps the slash mold S1 with the clamp portion 715.

Then, the guide lifter 71 descends as it is, and the seven flange portions of the slash type S1 are positioned and placed on the frame 731 and fixed by the fixing pins 732a. On the other hand, in synchronization with the descent of the slash mold S1, the material box 75 containing the powder material is pushed up from the turntable 77 by the scissor lift 79, and its 7 langes are positioned on the lower side of the frame 731 while the fixing pin 732b Fixed by As a result, the frontage portions of the slash mold S1 and the material box 75 are placed facing each other. In this state, the rocking device 7
3 operates to rotate the frame 731 1800 times and swing it.

At this time, the powder material in the material box 75 is transferred to the slush mold S1, adheres to the mold surface, and begins to melt. Next, the frame 731 is inverted so that the slash mold S1 is placed above, and the powder material not attached to the mold surface is returned to the material box 75 and collected. At this time, approximately 1n+n+ of molten powder material remains on the mold surface of the slash mold $1. Then, the lift rod 791 of the scissor lift 79 extends and the tip end of the lift rod 791 lifts the material box 79.
After the fixing pin 732b is released, the material box 75 is returned onto the turntable 77. In addition, material box 7
When the powder material No. 5 has been supplied a predetermined number of times, the turntable 77 rotates 1200 times to replace the material box, and the next material box 75 is prepared above the scissor lift 79. The slush type S1 is then lifted up by the guide lifter 71, transferred to the clamper 35 of the rear truck 3, and transported to the cooling station 5 by the rear truck 3. When the rear truck 3 reaches the cooling station 5, the first lifter 5
5 is raised, the slash mold S1 is transferred to the clamp portion 573 of the first mold reversing device 57, and after being reversed vertically, the first lifter 55 is lowered. As a result, the slush mold S1 enters the main tank 533 of the cooling water tank 53 and is immersed in the temperature-controlled water 537. Here about 50-10
It is cooled to 0° C., and the molten powder material adhering to the mold surface of the slush mold S1 is solidified. After a predetermined period of time has elapsed, the first lifter 55 rises and the slash type S
1 is turned upside down by the first type reversing device 57, and then clamped by the clamper 25 of the front truck 2, and the receiver is passed.

The front truck 2 then travels guided by the guide section 1, and the slush die S1 is transported to a position above the demolding station 4. Concurrently with this, the elevating lifter 43 rises, and the mold holding part 453 of the mold rotating device 45 causes the slash mold S1
I will take it. The slash mold S1 is lowered by the elevating lifter 43, rotated by 90'' by the mold rotation device 45,
The mold surface side of the slash mold S1 is directed toward the operator A side.

Next, the powder material (product in this case) melted and solidified on the mold surface of the slush mold S1 is peeled off from the mold surface by the operator A. This completes one cycle of the process. The above shows a case where one cycle of one slash type S1 is set to be completed in 240 seconds.

As shown in the time chart of FIG. 12, the slash type S2 is released 80 seconds after the slash type S1.
Start the same process as , and slash type S3 further 8
Start the same process after 0 seconds. During this time, the front truck 2 moves between the demolding station 4 and the heating station 6.
In addition, the rear truck 3 moves between the cooling station 5 and the material supply station 7, and each slush mold 81 to S3 is
The same operation is repeated three times in 240 seconds.

As described above, the powder slush molding apparatus of this embodiment has two
Three slush molds $1 to S3 are sequentially sent to each of four stations 4 to 7 using a truck 2.3. This enables high-cycle production of 80 seconds per takt. In addition, since the cooling station 5 and heating station 6, which require thermal energy, are arranged separately and independently, the energy required for one product can be reduced to about 1/3 to 1/2 compared to one-mold molding. becomes possible. Furthermore, although the demolding station 4 is the only step that requires manpower, one person can do three times as much work as in the past, centralizing the work and significantly reducing losses. In addition, since the three slash molds 81 to S3 are transported by two carts, the front cart 2 and the rear cart 3, the transport can be carried out efficiently using the minimum number of carts without interfering with each other. can.

[Effects of the Invention] The powder slush molding apparatus of the present invention includes at least three slush molds, one linearly extending guide portion for conveying the slush molds, and a linearly extending guide portion for conveying the slush molds. Consisting of a front truck and a rear truck located in the front-rear direction of the guide part, and a demolding station, a cooling station, a heating station, and a material supply station arranged along the guide part and behind the front of the guide part. It is. Thereby, the three slush molds can be sequentially transported to each station by the front truck and the rear truck, and the work process at each station can be performed simultaneously on the three slush molds. Therefore, three molded products can be obtained within the molding cycle unit required for slush molding, and productivity can be improved three times compared to conventional equipment.

[Brief explanation of the drawing]

1 to 12 relate to embodiments of the present invention, in which FIG. 1 is a side view schematically showing the general configuration of a powder slush molding device, FIG. 2 is a side view of the front truck, and FIG. FIG. 4 is a side view of the demolding station, FIG. 4 is a front view thereof, FIG. 5 is a sectional view of the cooling water tank, FIG. 6 is a side view of the cooling station, FIG. 7 is a front view of one side thereof, and FIG. 8 is a side view of the cooling station. Cross-sectional view of a fluidized bed furnace, No. 9
The figure is a front view of the material supply station, FIG. 10 is a plan view of the rocking device, FIG. 11 is a plan view of the turntable, and
FIG. 2 is a time chart when carrying out the molding process. 1...Guide part 2...Front truck 3...
Rear truck 4...Demolding station 5...
Cooling station 6... Heating station 7...
Material supply station 81~$3... Slash type patent applicant Toyota Motor Corporation representative
Patent Attorney Hiroshi OkawaFigure 2-Figure 8Figure 6Figure 11

Claims (1)

[Claims] (1) At least three slash molds, a linearly extending guide portion for transporting the slash molds, a front truck guided by the guide portion and always located in the front and back direction of the guide portion, and a rear truck. A powder slush molding apparatus comprising a truck, a demolding station, a cooling station, a heating station, and a material supply station arranged along the guide part and behind the guide part from the front thereof.