CN112847879A - Automatic proportioning and mixing device for raw materials - Google Patents
Automatic proportioning and mixing device for raw materials Download PDFInfo
- Publication number
- CN112847879A CN112847879A CN202011563088.XA CN202011563088A CN112847879A CN 112847879 A CN112847879 A CN 112847879A CN 202011563088 A CN202011563088 A CN 202011563088A CN 112847879 A CN112847879 A CN 112847879A
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- stirring
- sealing plate
- push rod
- mixing
- chute
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
- B29B7/242—Component parts, details or accessories; Auxiliary operations for feeding in measured doses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
- B29B7/242—Component parts, details or accessories; Auxiliary operations for feeding in measured doses
- B29B7/244—Component parts, details or accessories; Auxiliary operations for feeding in measured doses of several materials
Abstract
The invention belongs to the technical field of plastic film production equipment, and particularly relates to a raw material automatic proportioning and mixing device which comprises a stirring cylinder, a stirring mechanism and a plurality of material storage tanks, wherein a plurality of discharge ports with different sizes are formed in the side wall of the upper part of the stirring cylinder, and a discharge pipe is connected between one of the material storage tanks and one of the discharge ports; the inner wall of the mixing drum is provided with a chute, a sealing plate is arranged in the mixing drum, and the sealing plate is provided with a bulge which is connected to the chute in a sliding manner; a reset piece for plugging the sealing plate at the discharge port is connected between the sealing plate and the inner wall of the stirring cylinder; the stirring mechanism comprises a stirring shaft, a driving piece for driving the stirring shaft to rotate, and a push rod and a stirring blade which are fixed on the stirring shaft; the sealing plate is provided with a convex block which can be contacted with the push rod, and when the sealing plate moves to the limit position along the chute, the push rod is separated from the convex block. By using the technical scheme, the steps of material mixing operation can be simplified, the efficiency is improved, the time of the material mixing operation is saved, and the uniformity of raw material mixing can be improved.
Description
Technical Field
The invention belongs to the technical field of plastic film production equipment, and particularly relates to an automatic raw material proportioning and mixing device.
Background
In the production process of the plastic packaging film, various used raw materials need to be proportioned, then mixed and stirred, and the mixed raw materials are sent into a film casting device to produce the plastic packaging film. In the prior art, the process of proportioning and mixing various raw materials generally includes weighing the raw materials, then putting the weighed raw materials into a stirring mechanism, and finally mixing and stirring the raw materials by using the stirring mechanism to obtain the proportioned and mixed material. The mixing method has the following defects: 1) need weigh various raw materials alone, confirm the quantity of each raw materials, still need shift the raw materials to the churn in addition after weighing the raw materials in, it is comparatively troublesome to operate, wastes time and energy. 2) When the mixing drum is used for mixing raw materials, the mixing amount is large, various raw materials are simultaneously added, and long-time mixing is needed to ensure that the raw materials are relatively uniformly mixed.
Disclosure of Invention
The invention aims to provide a raw material automatic proportioning and mixing device to solve the problems of troublesome operation and much time consumption of the existing proportioning method.
In order to achieve the purpose, the scheme of the invention is as follows: a raw material automatic proportioning and mixing device comprises a stirring cylinder, a stirring mechanism and a plurality of storage tanks surrounding the upper part of the stirring cylinder, wherein a plurality of discharge ports with different sizes are formed in the side wall of the upper part of the stirring cylinder, and a discharge pipe is connected between one of the discharge ports and the storage tank; the inner wall of the mixing drum is provided with a chute, a sealing plate for sealing the discharge hole is arranged in the mixing drum, and the sealing plate is provided with a bulge which is connected to the chute in a sliding manner; a reset piece for plugging the sealing plate at the discharge port is connected between the sealing plate and the inner wall of the stirring cylinder; the stirring mechanism comprises a stirring shaft, a driving piece for driving the stirring shaft to rotate, and a push rod and a stirring blade which are fixed on the stirring shaft; the sealing plate is provided with a convex block which can be contacted with the push rod, and when the sealing plate moves to the limit position along the chute, the push rod is separated from the convex block.
The working principle and the beneficial effects of the scheme are as follows:
various raw materials are placed in the corresponding storage tanks, and the proportion of the raw materials in different storage tanks is equal to the proportion of the area of the discharge port corresponding to the storage tanks. When the raw materials need to be proportioned and mixed, the driving piece is started, and the driving piece drives the push rod and the stirring blade on the rotating shaft to rotate. The push rod pivoted in-process can contact with the protruding piece on the closing plate, and the push rod orders about the closing plate through protruding piece and removes along the chute, and the closing plate is opened the discharge gate gradually, and the raw materials in the storage tank passes through discharging pipe, discharge gate and enters into in the churn. When the closing plate removed along the chute, the height of closing plate changed gradually, and protruding piece removes along the push rod, and protruding piece breaks away from with the push rod at last, and the closing plate resets under the effect of piece that resets and blocks up the discharge gate once more. In the process that the push rod rotates a week, each discharge gate on the churn lateral wall is opened in proper order to the push rod, and each storage tank lets in quantitative raw materials through the discharge gate of difference in toward the churn, realizes the reinforced effect of ration. When the push rod rotates, the stirring blades also rotate together, and the stirring blades stir the raw materials of the mixing stirring cylinder, so that various raw materials can be uniformly mixed.
In this scheme, according to the discharge gate of each raw materials quantity rational design different specifications for when the push rod rotates the round, the proportion of each storage tank automatic discharge's raw materials accords with the requirement of preparation plastic film, realizes automatic discharging, quantitative ejection of compact, does not need the artificial batching of weighing, improves production efficiency. In the discharging process, the stirring mechanism stirs and mixes the raw materials in the stirring cylinder, so that the raw materials are uniformly mixed. Compared with the mode of pouring the raw materials into the stirrer at one time and then stirring in the prior art, the invention adopts the mode of adding the raw materials and mixing at the same time, each raw material is divided into a plurality of small parts, and each small part is mixed and stirred, so that the raw materials can be mixed more fully, and the quality of the subsequent film forming can be ensured.
Optionally, a horizontal groove communicated with one end of the chute is formed in the inner wall of the mixing drum, and when the protrusion is located at one end, far away from the chute, of the horizontal groove, the discharge hole is sealed by the sealing plate; a rotating shaft arranged in parallel with the discharging pipe is rotatably connected in the discharging pipe, a gear is fixed on one end of the rotating shaft close to the discharging port, and a stirring rod is arranged on the rotating shaft; the sealing plate is provided with a rack which can be meshed with the gear, and the inner wall of the mixing drum is provided with a containing groove for containing the rack. The caliber of the discharge pipe is relatively small, and raw materials in the discharge pipe are easily compacted to cause that the raw materials cannot be discharged. Set up pivot, puddler, gear isotructure in this scheme, when push rod drive closing plate removed along the horizontal slot, the discharge gate was opened gradually to the closing plate for raw materials in the discharge tube can discharge. When the closing plate removed along the horizontal slot, rack on the closing plate passed through gear drive pivot and rotated, and the epaxial puddler stirs, turns over the pine to the raw materials in the discharging tube, avoids the raw materials in the discharging tube because by the compaction and can't discharge. When the closing plate moved the end of horizontal groove, the discharge gate was opened completely to the closing plate, and the push rod continued to promote the closing plate through protruding piece this moment, and the closing plate then moved along the chute in getting into the chute, and the closing plate began to change in height when continuing to go forward, and gear, rack disengagement at this moment, and the push rod also began to break away from the contact gradually with protruding piece.
Optionally, the upper and lower sides of the sealing plate are provided with protrusions. The sealing plate is clamped on the inclined groove or the horizontal groove through the protrusions on the upper side and the lower side, so that the sealing plate can be more stably arranged on the inner wall of the stirring cylinder.
Optionally, the push rod is a telescopic rod, and a driving portion capable of enabling the push rod to contract is arranged on the push rod. When the materials in the mixing drum reach a certain amount, the materials need to be stopped from being continuously fed into the mixing drum, so that the excessive materials in the mixing drum are avoided. Make the push rod shrink through the drive division this moment, the push rod length after the shrink reduces, and the push rod rotates the in-process this moment and also can not take place the contact with protruding piece, and the stable shutoff of closing plate avoids the storage tank to continue the ejection of compact on the discharge gate. The push rod shrinks and does not influence the stirring shaft to continue rotating, the stirring blades continue stirring and mixing materials in the stirring cylinder, so that all the raw materials are uniformly mixed, and the mixing uniformity of all the raw materials is ensured.
Optionally, the push rod comprises a fixed cylinder fixed on the stirring shaft and a sliding rod connected in the fixed cylinder in a sliding manner; the driving part comprises an elastic piece, an iron block and an electromagnet; two ends of the elastic piece are respectively connected to the fixed cylinder and the sliding rod; the iron block is arranged at one end of the sliding rod close to the fixed cylinder, and the electromagnet is arranged in the fixed cylinder. When the push rod needs to be retracted, the electromagnet is powered on, the electromagnet generates magnetic attraction force on an iron block on the sliding rod, the sliding rod can overcome the acting force of the elastic piece and slide to one side of the fixed cylinder, and the length of the push rod is retracted.
Optionally, the bottom of the mixing drum is funnel-shaped with a large upper end and a small lower end. When raw materials in the storage tank pass through the discharging pipe and the discharging port and enter the stirring drum, the raw materials move downwards along the side wall of the stirring drum, and the raw materials fall on the edge part of the stirring drum and are not beneficial to mixing of the raw materials. The bottom of the mixing drum is arranged to be funnel-shaped, and the raw materials at the edge of the mixing drum can also move to the middle of the mixing drum under the action of gravity, so that the mixing of various raw materials is facilitated.
Optionally, a ball capable of contacting the bump is rotatably connected to the slide bar. When the sealing plate moves to a fixed position along the inclined groove, the ball is separated from the convex block, and the ball is arranged to enable the push rod to be separated from the convex block smoothly.
Optionally, the bottom of the storage tank is provided as a slope inclined toward the side of the mixing drum. So set up for raw materials in the storage tank can be better get into the churn through the discharging pipe.
Drawings
FIG. 1 is a front sectional view of an automatic raw material proportioning and mixing apparatus according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural view of the mixing drum of the present invention after the inner wall thereof is flattened.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the stirring device comprises a stirring cylinder 10, a discharge hole 11, a chute 12, a horizontal groove 13, a containing groove 14, a motor 20, a stirring shaft 21, a stirring blade 22, a storage tank 30, a discharge pipe 31, a fixed cylinder 40, an electromagnet 41, an elastic piece 42, a sliding rod 43, a ball 431, an iron block 44, a bracket 50, a sealing plate 60, a protrusion 61, a protrusion block 62, a rack 63, a reset piece 64, a rotating shaft 70, a stirring rod 71 and a gear 72.
This embodiment is substantially as shown in fig. 1-3: an automatic raw material proportioning and mixing device comprises a rack, a stirring cylinder 10, a stirring mechanism and a plurality of storage tanks 30 arranged on the rack, wherein the storage tanks 30 are uniformly distributed along the circumferential direction of the upper part of the stirring cylinder 10; the specific number of the stock tanks 30 is determined according to the number of each raw material, and 4 stock tanks 30 are provided assuming that 4 kinds of raw materials need to be mixed. The bottom of the storage tank 30 is provided with a slope inclined toward the mixing drum 10.
The stirring mechanism comprises a stirring shaft 21, a push rod, stirring blades 22 and a driving piece for driving the stirring shaft 21 to rotate, the stirring shaft 21 is positioned in the stirring cylinder 10, and the push rod and the stirring blades 22 are welded on the stirring shaft 21. The driving piece is a motor 20 fixedly arranged on the frame, and an output shaft of the motor 20 is connected to the upper end of the stirring shaft 21. The push rod of this scheme is the telescopic link, and the push rod includes welding fixed cylinder 40 and the sliding rod 43 of sliding connection in fixed cylinder 40 on (mixing) shaft 21. The push rod is provided with a driving part which can enable the push rod to contract, the driving part comprises an elastic piece 42, an iron block 44 and an electromagnet 41, the iron block 44 is fixed at the right end of the sliding rod 43, and the electromagnet 41 is fixedly arranged in the fixed cylinder 40; both ends of the elastic member 42 are connected to the fixed cylinder 40 and the sliding rod 43, respectively, and in this embodiment, the elastic member 42 is a compression spring.
The bottom of churn 10 is the big infundibulate of lower extreme of upper end, and it has the different discharge gate 11 of a plurality of sizes to open on the lateral wall on churn 10 upper portion, and the quantity of discharge gate 11 is the same with the quantity of storage tank 30, and discharge gate 11 sets up with storage tank 30 relatively. The discharging pipe 31 that the slope set up is connected with between storage tank 30 and the discharge gate 11 relative with this storage tank 30, so set up, be favorable to the raw materials in the storage tank 30 to pass through in discharging pipe 31 gets into churn 10. The size of the discharge port 11 is determined according to the usage amount of the raw materials contained in the storage tank 30, and the area ratio of each discharge port 11 is determined according to the ratio of each raw material; if the raw material consumption in the storage tank 30 is relatively large, the area of the corresponding discharge port 11 is relatively large. According to the scheme, the amount of the raw materials entering the mixing drum 10 from the storage tank 30 is controlled by controlling the size of the discharge port 11, so that the proportion of each raw material is ensured to meet the requirement. In the present embodiment, the respective discharge ports 11 have the same width and only differ in height.
A horizontal groove 13 and a chute 12 communicated with one end of the horizontal groove 13 are formed in the inner wall of the mixing drum 10, the lower end of the chute 12 is communicated with one end of the horizontal groove 13, and the horizontal groove 13 and the chute 12 jointly form a moving groove; the upper end and the lower end of any discharge port 11 are provided with a movable groove, and a horizontal groove 13 in the movable groove is opposite to the discharge port 11. Be equipped with the closing plate 60 that is used for shutoff discharge gate 11 in the churn 10, all welded on the upper and lower both sides of closing plate 60 has spherical arch 61, and protruding 61 block is in the shifting chute and can slide along the shifting chute. When the protrusion 61 slides along the horizontal groove 13, the sealing plate 60 moves along the inner wall of the mixing drum 10, the sealing plate 60 only moves on the same horizontal plane, and the height is not changed; the height of the sealing plate 60 is gradually increased as the protrusion 61 slides along the inclined groove 12 after entering the inclined groove 12 from the horizontal groove 13. A reset piece 64 is connected between the sealing plate 60 and the inner wall of the mixing drum 10, in this embodiment, the reset piece 64 is a tension spring, and when no other external force is applied to the sealing plate 60, the sealing plate 60 blocks the discharge hole 11 under the action of the tension spring. The sealing plate 60 is fixed with a convex block 62, the sliding rod 43 is rotatably connected with a ball 431 which can be contacted with the convex block 62, and when the sealing plate 60 moves to the limit position along the inclined groove 12, the ball 431 can be separated from the convex block 62.
The support 50 is fixedly mounted in the discharge pipe 31, a rotating shaft 70 rotatably connected to the support 50 is arranged in the discharge pipe 31, and the rotating shaft 70 is arranged in parallel with the discharge pipe 31. A gear 72 is welded at one end of the rotating shaft 70 close to the discharge hole 11, and a plurality of stirring rods 71 are welded on the rotating shaft 70; the sealing plate 60 is fixed with a rack 63 capable of meshing with the gear 72, and the rotating shaft 70 can be driven to rotate through the transmission of the rack 63 through the gear 72 when the sealing plate 60 moves. The inner wall of the mixing drum 10 is provided with an accommodating groove 14 for accommodating the rack 63, and when the sealing plate 60 moves, the rack 63 is always positioned in the accommodating groove 14, so that the influence on the movement of the sealing plate 60 due to the protrusion of the rack 63 can be avoided.
Various raw materials are placed in the corresponding storage tanks 30, and the proportion of the raw materials in different storage tanks 30 is equal to the proportion of the area of the discharge port 11 corresponding to the storage tanks 30. When the raw materials need to be proportioned and mixed, the motor 20 is started, and the motor 20 drives the push rod on the rotating shaft 70 and the stirring blade 22 to rotate. The rotating process of the push rod can be contacted with the convex block 62 on the sealing plate 60, the ball 431 on the push rod drives the sealing plate 60 to move along the horizontal groove 13 through the convex block 62, the sealing plate 60 gradually opens the discharge port 11, and the raw material in the storage tank 30 enters the stirring cylinder 10 through the discharge pipe 31 and the discharge port 11. When the sealing plate 60 moves along the horizontal groove 13, the rack 63 on the sealing plate 60 drives the rotating shaft 70 to rotate through the gear 72, and the stirring rod 71 on the rotating shaft 70 stirs and turns over the raw material in the discharging pipe 31, so that the situation that the raw material in the discharging pipe 31 cannot be discharged due to compaction is avoided. When the sealing plate 60 moves to the end of the horizontal groove 13, the sealing plate 60 completely opens the discharge hole 11, the ball 431 continues to push the sealing plate 60 by the protrusion block 62, the sealing plate 60 enters the inclined groove 12 and then moves along the inclined groove 12, the sealing plate 60 continues to advance and simultaneously starts to rise, the gear 72 and the rack 63 are disengaged, and the ball 431 and the protrusion block 62 gradually start to be disengaged. After the protrusions 62 are disengaged from the balls 431, the sealing plate 60 is reset by the reset member 64 and blocks the discharge hole 11 again. The stirring vanes 22 rotate together with the rotation of the push rod, and the stirring vanes 22 stir and mix the raw materials in the mixing drum 10, so that various raw materials can be uniformly mixed.
When the material in the mixing drum 10 reaches a certain amount, the continuous feeding into the mixing drum 10 needs to be stopped, so as to avoid the excessive material in the mixing drum 10. When the electromagnet 41 is energized, the electromagnet 41 generates a magnetic attraction force to the iron block on the slide rod 43, so that the slide rod 43 can slide toward the fixed cylinder 40 against the urging force of the elastic member 42, and the length of the push rod is shortened. At this moment, the push rod cannot contact with the convex block 62 in the rotating process, and the sealing plate 60 is stably blocked on the discharge hole 11, so that the storage tank 30 is prevented from discharging continuously. The shrinkage of the push rod does not affect the continuous rotation of the stirring shaft 21, and the stirring blades 22 continuously stir the materials in the mixing and stirring cylinder 10, so that the raw materials are uniformly mixed, and the mixing uniformity of the raw materials is ensured.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (8)
1. The utility model provides an automatic ratio mixing arrangement of raw materials which characterized in that: the stirring device comprises a stirring cylinder, a stirring mechanism and a plurality of material storage tanks surrounding the upper part of the stirring cylinder, wherein a plurality of discharge ports with different sizes are formed in the side wall of the upper part of the stirring cylinder, and a discharge pipe is connected between one of the material storage tanks and one of the discharge ports; the inner wall of the mixing drum is provided with a chute, a sealing plate for sealing the discharge hole is arranged in the mixing drum, and the sealing plate is provided with a bulge which is connected to the chute in a sliding manner; a reset piece for plugging the sealing plate at the discharge port is connected between the sealing plate and the inner wall of the stirring cylinder; the stirring mechanism comprises a stirring shaft, a driving piece for driving the stirring shaft to rotate, and a push rod and a stirring blade which are fixed on the stirring shaft; the sealing plate is provided with a convex block which can be contacted with the push rod, and when the sealing plate moves to the limit position along the chute, the push rod is separated from the convex block.
2. The automatic raw material proportioning and mixing device of claim 1, wherein: a horizontal groove communicated with one end of the chute is formed in the inner wall of the mixing drum, and when the protrusion is located at one end, far away from the chute, of the horizontal groove, the discharge hole is blocked by the sealing plate; a rotating shaft arranged in parallel with the discharging pipe is rotatably connected in the discharging pipe, a gear is fixed on one end of the rotating shaft close to the discharging port, and a stirring rod is arranged on the rotating shaft; the sealing plate is provided with a rack which can be meshed with the gear, and the inner wall of the mixing drum is provided with a containing groove for containing the rack.
3. The automatic raw material proportioning and mixing device of claim 2, wherein: the upper and lower both sides of closing plate all are equipped with the arch.
4. The automatic raw material proportioning and mixing device of any one of claims 1-3, wherein: the push rod is a telescopic rod, and a driving part capable of enabling the push rod to contract is arranged on the push rod.
5. The automatic raw material proportioning and mixing device of claim 4, wherein: the push rod comprises a fixed cylinder fixed on the stirring shaft and a sliding rod connected in the fixed cylinder in a sliding manner; the driving part comprises an elastic piece, an iron block and an electromagnet; two ends of the elastic piece are respectively connected to the fixed cylinder and the sliding rod; the iron block is arranged at one end of the sliding rod close to the fixed cylinder, and the electromagnet is arranged in the fixed cylinder.
6. The automatic raw material proportioning and mixing device of claim 5, wherein: the bottom of the mixing drum is in a funnel shape with a large upper end and a small lower end.
7. The automatic raw material proportioning and mixing device of claim 6, wherein: the sliding rod is rotatably connected with a ball which can be contacted with the convex block.
8. The automatic raw material proportioning and mixing device of claim 7, wherein: the bottom of the material storage tank is provided with an inclined surface inclined towards one side of the mixing drum.
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| CN202011563088.XA CN112847879B (en) | 2020-12-25 | 2020-12-25 | Automatic raw material proportioning and mixing device |
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| CN202011563088.XA CN112847879B (en) | 2020-12-25 | 2020-12-25 | Automatic raw material proportioning and mixing device |
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| CN112847879B CN112847879B (en) | 2022-09-09 |
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| CN115972423A (en) * | 2022-12-07 | 2023-04-18 | 江苏惠利隆塑业集团有限公司 | Preparation device for household appliance plastic |
| CN116653150A (en) * | 2023-07-28 | 2023-08-29 | 广州孚达保温隔热材料有限公司 | XPS extruded sheet secondary foaming device |
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