CN206644220U - Rotational molding machine - Google Patents
Rotational molding machine Download PDFInfo
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- CN206644220U CN206644220U CN201720249162.8U CN201720249162U CN206644220U CN 206644220 U CN206644220 U CN 206644220U CN 201720249162 U CN201720249162 U CN 201720249162U CN 206644220 U CN206644220 U CN 206644220U
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Abstract
The utility model discloses a kind of rotational molding machine, including base, base is provided with mounting bracket, the both sides of mounting bracket turn to be located on base by rotary shaft, mounting bracket is provided with swivel mount, Plastic Rolling Molds are provided among swivel mount, the both ends of mounting bracket are respectively equipped with front wheel component and rear roller component, front wheel component and rear roller component are arranged between the first power transmission shaft and second driving shaft, first power transmission shaft and second driving shaft both ends are fixed on mounting bracket both ends by axle sleeve, first power transmission shaft is provided with the drive device for driving swivel mount and Plastic Rolling Molds rotary work, the both sides of mounting bracket, which are provided with, drives mounting bracket and the wiggly wabbler mechanism of Plastic Rolling Molds, the first heater to the heating of the Plastic Rolling Molds whole body is provided among mounting bracket, mounting bracket is provided with the secondary heating mechanism to Plastic Rolling Molds bottom-heated close to the side of drive device.The utility model allows Plastic Rolling Molds to rotate and wave, and is effectively improved on injection-molded item thin-walled and the defects of stomata occurs, and the quality of production is high.
Description
Technical field
Rotational molding machine is the utility model is related to, more specifically, it relates to a kind of rotational molding machine.
Background technology
Rotational molding machine is a kind of plastic apparatus that hollow plastic product is made using plastic powder, and it mainly passes through a job
Arm drives the Plastic Rolling Molds rotation after thermally equivalent, the plastic powder of melting in Plastic Rolling Molds is uniformly applied under gravity
Cloth, the whole inner surface for attaching to Plastic Rolling Molds, so that rotomoulded articles are molded, then after cooling and shaping, die sinking can be taken off
Finished product.
Publication No. CN203355990U Chinese patent discloses a kind of hot rotational moulding lining processing rotational moulding in the prior art
Machine, including motor, support, workpiece external fixing rack and workpiece inner fixed stand, the motor are linked by drive link and support
Axis connection, workpiece external fixing rack is installed on the support, the side of the workpiece external fixing rack is provided with final drive shaft, up and down
End is provided with counter drive shaft, and the workpiece inner fixed stand is socketed in workpiece external fixing rack, and socket place and counter drive shaft gear
Occlusion, the linkage shaft connection place engaged gears of the final drive shaft and support.
Above-mentioned rotational molding machine can make Plastic Rolling Molds uniformly do three-dimensional rotation by the mutual cooperation of universal driving shaft and power transmission shaft
Turn, the plastic coating on mould inner surface is uniformly smeared.But above-mentioned injection machine can not solve the thin-walled of injection-molded item
On there is the defects of stomata, so as to cause the quality of rotomoulded articles undesirable.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of rotational molding machine, make Plastic Rolling Molds
It can rotate and wave, be effectively improved on injection-molded item thin-walled and the defects of stomata occur, the quality of production is high, and operating efficiency is high.
Above-mentioned technical purpose of the present utility model technical scheme is that：
A kind of rotational molding machine, including base, the base are provided with mounting bracket, and the both sides of the mounting bracket are turned by rotary shaft
It is located on base, the mounting bracket is provided with swivel mount, and Plastic Rolling Molds, the both ends of the mounting bracket are provided among the swivel mount
Front wheel component and rear roller component are respectively equipped with, the front wheel component and rear roller component are arranged on the first power transmission shaft and
Between two power transmission shafts, first power transmission shaft and second driving shaft both ends are fixed on mounting bracket both ends by axle sleeve respectively, described
First power transmission shaft is provided with the drive device for driving swivel mount and Plastic Rolling Molds rotary work, and the both sides of the mounting bracket are provided with band
Mounting bracket and the wiggly wabbler mechanism of Plastic Rolling Molds are moved, the both sides that rotary shaft is located on the base are provided with spacing wobbler
The position-limit mechanism of structure swing angle, the mounting bracket centre are provided with the first heater heated to the Plastic Rolling Molds whole body,
The mounting bracket is provided with the secondary heating mechanism to Plastic Rolling Molds bottom-heated close to the side of drive device.
By using above-mentioned technical proposal, Plastic Rolling Molds turn to be located on swivel mount and drive by drive device, make rotational moulding
Mould constantly rotates in injection moulding process, so that the plastic coating on mould inner surface can be smeared uniformly, in mounting bracket
It is respectively equipped with four angles and drives the wiggly wabbler mechanism of mounting bracket, injection mold is constantly waved in injection moulding process, from
And plastic coating in both mold ends is uniformly smeared, rotate and wave while carry out, be effectively improved on injection-molded item thin-walled
There is the defects of stomata, the quality of production is high, and operating efficiency is high.
The utility model is further arranged to, and the front wheel component includes being fixedly installed on the anterior front wheel of rotary shaft
Disk, the first front wheel being arranged on the first power transmission shaft, the second front wheel being arranged on second driving shaft, the front wheel disk
Be provided with the first stopper slot, first front wheel and the second front wheel be limited in the first stopper slot on front wheel disk Nei and with
First power transmission shaft rotates together.
By using above-mentioned technical proposal, swivel mount front end rotates along front wheel component, before the first front wheel, second
Stable rotation is realized in the cooperation of roller and front wheel disk, so that Plastic Rolling Molds rotate.
The utility model is further arranged to, and the rear roller component includes the rear roller for being fixedly installed on rotary shaft rear portion
Disk, the first rear roller being arranged on the first power transmission shaft, the second rear roller being arranged on second driving shaft, the rear roller disk
Be provided with the second stopper slot, first rear roller and the second rear roller be limited in the second stopper slot on rear roller disk Nei and with
First power transmission shaft rotates together.
By using above-mentioned technical proposal, swivel mount rear end rotates along rear roller component, after the first rear roller, second
Stable rotation is realized in the cooperation of roller and rear roller disk, and rear roller component drives swivel mount and rotational moulding mould together with front wheel component
Tool rotation, so that the plastic coating on mould inner surface can be smeared uniformly.
The utility model is further arranged to, and the drive device includes motor, the commutation being arranged on mounting bracket
Device, pulley assembly and chain wheel assembly, the motor are connected with commutator by pulley assembly, the commutator
First power transmission shaft is connected by chain wheel assembly.
By using above-mentioned technical proposal, driving motor supplies power source, commutator can change transmission direction, belt pulley
Component realizes the connection between motor and commutator, and chain wheel assembly realizes the biography between thread changing device and the first power transmission shaft
It is dynamic, stable transmission.
The utility model is further arranged to, and the wabbler mechanism includes being arranged on four angles of mounting bracket waving gas
Cylinder, the bottom for waving cylinder are arranged on base by the way that articulated elements is be hinged, and the piston rod for waving cylinder passes through be hinged
Part connects mounting bracket.
By using above-mentioned technical proposal, wabbler mechanism can drive mounting bracket yaw movements, and rocking action enters
The rotary work of row and swivel mount works respectively, and complementation interference, the plastic coating being effectively ensured on mould inner surface rotates and shaken
Pendulum is carried out simultaneously, moreover it is possible to is effectively improved on injection-molded item thin-walled and the defects of stomata occurs, the quality of production is high, and operating efficiency is high.
The utility model is further arranged to, and the pulley assembly includes the first skin being arranged in motor rotating shaft
Belt wheel, the second belt pulley being arranged on commutator, and the transmission skin being arranged between the first belt pulley and the second belt pulley
Band.
By using above-mentioned technical proposal, pulley assembly realizes the linkage between motor and commutator, structure
Simply, stable transmission.
The utility model is further arranged to, and the chain wheel assembly includes the first sprocket wheel being arranged on the first power transmission shaft,
The second sprocket wheel being arranged on commutator, and the chain being arranged between the first sprocket wheel and the second sprocket wheel.
By using above-mentioned technical proposal, chain wheel assembly realizes the action transmission between commutator and the first power transmission shaft,
Make the stable rotation of the first power transmission shaft.
The utility model is further arranged to, and the first heater adds including being arranged on first below Plastic Rolling Molds
Hot support, first day hot gas tube head being disposed in parallel in the first heated holder, and be arranged on the first natural gas tube head
Some first heated nozzles.
By using above-mentioned technical proposal, first heater heats to Plastic Rolling Molds side, when rotational moulding mould
Tool is rotated by drive device, so as to realize the heating circumferential to Plastic Rolling Molds, melts plastic heating in mould
Melt, the plastic coating on mould inner surface can be smeared uniformly.
The utility model is further arranged to, and the secondary heating mechanism includes the second installation being arranged on mounting bracket
Frame, two the second natural gas tube heads being located on the second mounting bracket, two the second natural gas tube head both ends pass through the first connection
Plate and the second connecting plate connect, and row is provided with some second heated nozzles on the first connecting plate, and the second connecting plate both ends pass through two
Regulating arm is movably arranged on mounting bracket.
By using above-mentioned technical proposal, secondary heating mechanism heats to both mold ends, when wabbler mechanism drives mounting bracket
During yaw movements, it is effectively improved on injection-molded item thin-walled and the defects of stomata occurs, the quality of production is high.
The utility model is further arranged to, and the bottom of described two regulating arms is arranged on mounting bracket by the way that articulated elements is be hinged
On, have regulating tank on described two regulating arms, be provided with position adjustments screw rod in regulating tank, position adjustments screw rod connects the
Two connecting plates.
By using above-mentioned technical proposal, position adjustments screw rod slides up and down the height of the second mounting bracket of regulation along regulating tank
Degree, it is convenient that Plastic Rolling Molds are heated.
In summary, the utility model has the advantages that：
First, Plastic Rolling Molds turn to be located on swivel mount and drive by drive device, make Plastic Rolling Molds in injection moulding process
Constantly rotation, so that the plastic coating on mould inner surface can be smeared uniformly, is respectively equipped with four angles of mounting bracket
The wiggly wabbler mechanism of mounting bracket is driven, injection mold is constantly waved in injection moulding process, so that being moulded in both mold ends
Material coating can be smeared uniformly, rotate and wave while carry out, be effectively improved on injection-molded item thin-walled and the defects of stomata occur, raw
Yield and quality is high, and operating efficiency is high；
Second, wabbler mechanism includes being arranged on four angles of mounting bracket waving cylinder, installation can be driven by waving cylinder
Frame yaw movements, the progress of yaw movements and the rotary work of swivel mount are carried out respectively, complementation interference；
Third, having regulating tank on two regulating arms, position adjustments screw rod is provided with regulating tank, adjusting screw rod edge is adjusted
Section groove slides up and down the height of the second mounting bracket of regulation, convenient that Plastic Rolling Molds are heated.
Brief description of the drawings
Fig. 1 is the structural representation of the present embodiment；
Fig. 2 is the top view of the present embodiment；
Fig. 3 is the structural representation of the present embodiment mounting bracket；
Fig. 4 is the structural representation of the present embodiment drive device；
Fig. 5 is the structural representation of the present embodiment secondary heating mechanism；
Fig. 6 is the structural representation of the present embodiment first heater；
Fig. 7 is the structural representation of the present embodiment front wheel component and rear roller component.
In figure：1st, base；2nd, mounting bracket；3rd, rotary shaft；4th, drive device；41st, motor；42nd, commutator；43rd, skin
Pulley assemblies；431st, the first belt pulley；432nd, the second belt pulley；433rd, driving belt；44th, chain wheel assembly；441st, the first sprocket wheel；
442nd, the second sprocket wheel；443rd, chain；5th, wabbler mechanism；51st, cylinder is waved；6th, front wheel component；61st, front wheel disk；62nd, first
Front wheel；63rd, the second front wheel；64th, the first stopper slot；7th, rear roller component；71st, rear roller disk；72nd, the first rear roller；73、
Second rear roller；74th, the second stopper slot；8th, first heater；81st, the first heated holder；82nd, the first natural gas tube head；83、
First heated nozzle；84th, support arm；85th, height-regulating slot；86th, height adjusting screw rod；9th, secondary heating mechanism；91st, the second peace
Shelve；92nd, the first connecting plate；93rd, the second connecting plate；94th, the second heated nozzle；95th, regulating arm；96th, regulating tank；97th, position
Adjusting screw rod；98th, the second natural gas tube head；10th, swivel mount；11st, Plastic Rolling Molds；12nd, the first power transmission shaft；13rd, second driving shaft；
14th, axle sleeve；15th, position-limit mechanism；151st, the first travel switch；152nd, the second travel switch.
Embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
Embodiment：A kind of rotational molding machine, reference picture 1, including base 1,1 middle indent of base are set, and peace is provided with groove
2 are shelved, the both sides of mounting bracket 2 are located on base 1 for 3 turns by rotary shaft, and the first power transmission shaft 12 and second is arranged with installing
Power transmission shaft 13, the first power transmission shaft 12 and the second transmission are supported by axle sleeve 14, and it is another from one end of mounting bracket 2 to be through to its
End, is provided with swivel mount 10, the front end of swivel mount 10 is located at the He of the first power transmission shaft 12 for 6 turns by front wheel component on mounting bracket 2
Between second driving shaft 13, the rear end of swivel mount 10 is located at the first power transmission shaft 12 and second driving shaft for 7 turns by rear roller component
Between 13, mounting bracket 2 is provided with the drive device 4 that the first power transmission shaft 12 of driving rotates.
Reference picture 2 and Fig. 3, are provided with the wabbler mechanism 5 for driving mounting bracket 2 to swing on base 1, and wabbler mechanism 5 wraps
Include to be separately positioned on 2 four angles of mounting bracket and wave cylinder 51, wave upper end and the be hinged setting of mounting bracket of cylinder 51, wave
The lower end of cylinder 51 and the be hinged limit for setting, the limitation swing angle of wabbler mechanism 5 being respectively equipped with the both sides of rotary shaft 3 of base 1
Position mechanism 15, position-limit mechanism 15 include the first travel switch 151 for being arranged on the side of rotary shaft 3, are arranged on the opposite side of rotary shaft 3
The second travel switch 152.
Reference picture 4, drive device 4 include motor 41, commutator 42, the pulley assembly being arranged on mounting bracket 2
43 and chain wheel assembly 44.Motor 41 is connected with commutator 42 by pulley assembly 43, and commutator 42 passes through sprocket wheel
Component 44 connects the first power transmission shaft 12.Wherein, pulley assembly 43 includes the first belt being arranged in the rotating shaft of motor 41
Wheel 431, the second belt pulley 432 being arranged on commutator 42, and it is arranged on the first belt pulley 431 and the second belt pulley 432
Between driving belt 433；Chain wheel assembly 44 includes the first sprocket wheel 441 being arranged on the first power transmission shaft 12, is arranged on annular
The second sprocket wheel 442 on device, and the chain 443 being arranged between the first sprocket wheel 441 and the second sprocket wheel 442.
Reference picture 5, secondary heating mechanism 9 is provided with the side of mounting bracket 2, and secondary heating mechanism 9 includes being arranged on mounting bracket 2
On the second mounting bracket 91, two the second natural gas tube heads 98 being located on the second mounting bracket 91, two the second natural gas tubes
First 98 both ends are connected by the first connecting plate 92 and the second connecting plate 93, and row is provided with some second heating and sprayed on the first connecting plate 92
Mouth 94, the both ends of the second connecting plate 93 are movably arranged on mounting bracket 2 by two regulating arms 95, and the bottom of two regulating arms 95 leads to
Cross that articulated elements is be hinged to be arranged on mounting bracket, have position adjustments groove 96 on two regulating arms 95, in position adjustments groove 96
Provided with position adjustments screw rod 97, position adjustments screw rod connects the second connecting plate 93.
Reference picture 6, is provided with first heater 8 among mounting bracket 2, and first heater 8 includes being arranged on rotational moulding mould
First heated holder 81 of the lower section of tool 11, first day hot gas tube head being disposed in parallel in the first heated holder 81, and set
Some first heated nozzles 83 on the first natural gas tube head 82, the first heated holder 81 are provided with the convenient heating of regulation first
Four support arms 84 of the heated height of device 8, height-regulating slot 85 is provided among support arm 84, is set in height-regulating slot 85
There is height adjusting screw rod 86, support arm 84 is fixed on mounting bracket 2 by height adjusting screw rod 86.
Reference picture 7, the front end of swivel mount 10 are provided with front wheel component 6, and the rear end of swivel mount 10 is provided with rear roller component 7, rotation
Frame 10 is located between the first power transmission shaft 12 and second driving shaft 13 by 7 turns of front wheel component 6 and rear roller component.Front wheel group
Part 6 includes being fixedly installed on the anterior front wheel disk 61 of rotary shaft 3, the first front wheel 62 being arranged on the first power transmission shaft 12,
The second front wheel 63 being arranged on second driving shaft 13, the front wheel disk 61 are provided with the first stopper slot 64, and described first
The front wheel 63 of front wheel 62 and second is limited in the first stopper slot 64 on front wheel disk 61 and with the first power transmission shaft 12
Rotate；Rear roller component 7 includes being fixedly installed on the rear roller disk 71 at the rear portion of rotary shaft 3, is arranged on the first power transmission shaft 12
First rear roller 72, the second rear roller 73 being arranged on second driving shaft 13, it is spacing that the rear roller disk 71 is provided with second
Groove 74, the rear roller 73 of the first rear roller 72 and second are limited in the second stopper slot 74 on rear roller disk 71 and with first
Power transmission shaft 12 rotates together.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of rotational molding machine, including base (1), it is characterised in that：The base (1) is provided with mounting bracket (2), the mounting bracket
(2) both sides turn to be located on base (1) by rotary shaft (3), and the mounting bracket (2) is provided with swivel mount (10), the rotation
Plastic Rolling Molds (11) are provided among frame (10), the both ends of the mounting bracket (2) are respectively equipped with front wheel component (6) and rear roller group
Part (7), the front wheel component (6) and rear roller component (7) be arranged on the first power transmission shaft (12) and second driving shaft (13) it
Between, first power transmission shaft (12) and second driving shaft (13) both ends are fixed on mounting bracket (2) both ends by axle sleeve (14) respectively,
First power transmission shaft (12) is provided with the drive device (4) for driving swivel mount (10) and Plastic Rolling Molds (11) rotary work, institute
The both sides for stating mounting bracket (2) are provided with drive mounting bracket (2) and Plastic Rolling Molds (11) wiggly wabbler mechanism (5), the bottom
Seat（1）It is upper to be located at rotary shaft（3）Both sides be provided with spacing wabbler mechanism（5）The position-limit mechanism of swing angle（15）, the installation
The first heater (8) heated to Plastic Rolling Molds (11) whole body is provided among frame (2), the mounting bracket (2) is close to drive
The side of dynamic device (4) is provided with the secondary heating mechanism (9) to Plastic Rolling Molds (11) bottom-heated.
2. rotational molding machine according to claim 1, it is characterised in that：The front wheel component (6) includes being fixedly installed on rotation
The anterior front wheel disk (61) of rotating shaft (3), the first front wheel (62) being arranged on the first power transmission shaft (12), are arranged on the second biography
The second front wheel (63) on moving axis (13), the front wheel disk (61) are provided with the first stopper slot (64), rolled before described first
Wheel and the second front wheel (63) are limited in the first stopper slot (64) on front wheel disk (61) Nei and with the first power transmission shaft (12) one
Rise and rotate.
3. rotational molding machine according to claim 1, it is characterised in that：The rear roller component (7) includes being fixedly installed on rotation
The rear roller disk (71) at rotating shaft (3) rear portion, the first rear roller (72) being arranged on the first power transmission shaft (12), are arranged on the second biography
The second rear roller (73) on moving axis (13), the rear roller disk (71) are provided with the second stopper slot (74), rolled after described first
Wheel (72) and the second rear roller (73) are limited in the second stopper slot (74) on rear roller disk (71) Nei and with the first power transmission shaft
(12) rotate together.
4. rotational molding machine according to claim 1, it is characterised in that：The drive device（4）Including being arranged on mounting bracket (2)
On motor (41), commutator (42), pulley assembly (43) and chain wheel assembly (44), the motor (41) is with changing
It is connected to device (42) by pulley assembly (43), the commutator (42) passes through the transmission of chain wheel assembly (44) connection first
Axle (12).
5. rotational molding machine according to claim 1, it is characterised in that：The wabbler mechanism (5) includes being arranged on mounting bracket (2)
Cylinder (51) is waved on four angles, the bottom for waving cylinder (51) is arranged on base (1) by the way that articulated elements is be hinged, institute
State wave cylinder (51) piston rod pass through articulated elements connect mounting bracket (2).
6. rotational molding machine according to claim 4, it is characterised in that：The pulley assembly (43) includes being arranged on driving electricity
The first belt pulley (431) in machine (41) rotating shaft, the second belt pulley (432) being arranged on commutator (42), and be arranged on
Driving belt (433) between first belt pulley (431) and the second belt pulley (432).
7. rotational molding machine according to claim 4, it is characterised in that：The chain wheel assembly (44) includes being arranged on the first transmission
The first sprocket wheel (441) on axle (12), the second sprocket wheel (442) being arranged on commutator (42), and it is arranged on the first sprocket wheel
(441) chain (443) between the second sprocket wheel (442).
8. rotational molding machine according to claim 1, it is characterised in that：The first heater (8) includes being arranged on rotational moulding
The first heated holder (81) below mould (11), first day hot gas tube head being disposed in parallel in the first heated holder (81)
, and some first heated nozzles (83) for being arranged on the first natural gas tube head (82) (82).
9. rotational molding machine according to claim 1, it is characterised in that：The secondary heating mechanism (9) includes being arranged on installation
The second mounting bracket (91) on frame (2), two the second natural gas tube heads being located on the second mounting bracket (91)（98）, two
Two natural gas tube heads（98）Both ends are connected by the first connecting plate (92) and the second connecting plate (93), and the first connecting plate is arranged on (92)
Provided with some second heated nozzles (94), the second connecting plate (93) both ends are movably arranged on mounting bracket by two regulating arms (95)
(2) on.
10. rotational molding machine according to claim 9, it is characterised in that：The bottom of described two regulating arms (95) passes through be hinged
Part is be hinged to be arranged on mounting bracket（2）On, regulating tank (96) is had on described two regulating arms (95), is set in regulating tank (96)
There is position adjustments screw rod (97), position adjustments screw rod (97) connects the second connecting plate (93).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720249162.8U CN206644220U (en) | 2017-03-15 | 2017-03-15 | Rotational molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720249162.8U CN206644220U (en) | 2017-03-15 | 2017-03-15 | Rotational molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206644220U true CN206644220U (en) | 2017-11-17 |
Family
ID=60280712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720249162.8U Active CN206644220U (en) | 2017-03-15 | 2017-03-15 | Rotational molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206644220U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421728A (en) * | 2020-05-07 | 2020-07-17 | 东莞市勇兴富五金塑胶有限公司 | Full-automatic rotational molding machine |
| CN114953289A (en) * | 2022-05-05 | 2022-08-30 | 南通朋闻塑料科技有限公司 | High-efficiency energy-saving rotational molding machine |
-
2017
- 2017-03-15 CN CN201720249162.8U patent/CN206644220U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421728A (en) * | 2020-05-07 | 2020-07-17 | 东莞市勇兴富五金塑胶有限公司 | Full-automatic rotational molding machine |
| CN114953289A (en) * | 2022-05-05 | 2022-08-30 | 南通朋闻塑料科技有限公司 | High-efficiency energy-saving rotational molding machine |
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