Batching system of multi-layer co-extrusion film forming equipment

Abstract

The utility model discloses a batching system of multi-layer co-extrusion film forming equipment. The batching system comprises a feeding center, a material distributing and distributing center, a batching and conveying pipeline and a co-extrusion film feeding center, the material distribution and distribution center comprises a plurality of multi-channel distribution pipes, each multi-channel distribution pipe comprises a feeding pipe and a plurality of discharging pipes, and the feeding pipes are connected with the feeding stations; the co-extrusion film feeding center comprises a plurality of screw extruders connected to a co-extrusion film mold of the multi-layer co-extrusion film forming equipment, and a plurality of mixed storage bin assemblies for feeding materials to the screw extruders respectively; the ingredient conveying pipeline comprises a conveying pipe assembly which is connected to each mixed storage bin assembly in a matched mode and composed of a plurality of conveying pipes, and the conveying pipes in the same conveying pipe assembly are correspondingly connected to discharging pipes, belonging to different multi-channel distribution pipes, in the material distribution and distribution center. According to the multi-layer co-extrusion film forming equipment, the automation of batching of the multi-layer co-extrusion film forming equipment is realized, and the production efficiency of the multi-layer co-extrusion film is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batching of co-extruded film equipment, and specifically relates to a batching system for a multi-layer co-extruded film forming equipment. Background Art

[0002] A multi-layer co-extruded film forming equipment is a device for producing multi-layer composite film products (such as food packaging bags, etc.) through a co-extrusion process, which can melt plastic particles by heating and then blow them into a film. According to the number of layers of the composite film, the multi-layer co-extruded film forming equipment can also be correspondingly divided into a three-layer co-extruded film forming equipment, a five-layer co-extruded film forming equipment, a seven-layer co-extruded film forming equipment, a nine-layer co-extruded film forming equipment, etc. The main components in the multi-layer co-extruded film forming equipment include a multi-layer co-extruded film extrusion die, a film blowing system, a cooling system, a winding system, and multiple screw extruders for providing high-pressure molten materials to the multi-layer co-extruded film extrusion die, etc.

[0003] A multi-layer co-extruded film die is provided with a plurality of annular extrusion cavities, and the plurality of annular extrusion cavities converge at the discharge end. When the multi-layer co-extruded film forming equipment works, each screw extruder is responsible for feeding the combined batching of one layer of film in the multi-layer composite film. Each screw extruder respectively injects the materials (plastic particles) with different batching combinations into each inner annular extrusion cavity of the multi-layer co-extruded film die after mixing, heating and melting through high pressure, forms a composite at the discharge port of the multi-layer co-extruded film die, then enters the film blowing system for film blowing, and is wound after cooling and shaping to produce a packaging bag of the multi-layer composite film.

[0004] The above multi-layer co-extruded film forming equipment in the prior art still has the following deficiencies: the materials provided for the screw extruder are manually batched, with low production efficiency and it is not easy to ensure the batching quality. Therefore, it is necessary to make technical improvements to overcome the above disadvantages. Summary of the Utility Model

[0005] In order to solve the above problems, the utility model proposes a batching system for a multi-layer co-extruded film forming equipment, aiming to realize the automation of the batching of the multi-layer co-extruded film forming equipment, thereby improving the production efficiency of the multi-layer co-extruded film and improving the quality stability of the multi-layer co-extruded film production. The specific technical solutions are as follows:

[0006] An ingredient system for a multi-layer co-extrusion film forming device, comprising a feeding center, a material distribution and delivery center, ingredient conveying pipelines, and a co-extrusion film feeding center that are set accordingly according to the ingredient process; the feeding center includes a number of feeding stations; the material distribution and delivery center includes a number of multi-path distribution pipes, and each multi-path distribution pipe includes an inlet pipe and a plurality of outlet pipes connected to the inlet pipe, and the inlet pipe on the multi-path distribution pipe is connected to one of the feeding stations in the feeding center; the co-extrusion film feeding center includes a number of screw extruders connected to the co-extrusion film die of the multi-layer co-extrusion film forming device, and a number of mixing storage bin assemblies for feeding each of the screw extruders respectively; the ingredient conveying pipelines include a feed pipe assembly composed of a number of feed pipes that are connected to each of the mixing storage bin assemblies, and each feed pipe in the same feed pipe assembly is respectively connected to the outlet pipes of different multi-path distribution pipes in the material distribution and delivery center.

[0007] Preferably, the multi-layer co-extrusion film forming device is one of a seven-layer co-extrusion film device, a nine-layer co-extrusion film device, and an eleven-layer co-extrusion film device.

[0008] Preferably, the multi-path distribution pipe has one inlet pipe and four outlet pipes.

[0009] In the above-mentioned ingredient conveying pipelines, for the same or different multi-layer co-extrusion film forming devices, correspondingly, the number of feed pipes in each group of feed pipe assemblies can be the same or different.

[0010] Preferably, the ingredient conveying pipeline further includes a pipe cleaning assembly arranged on the feed pipe, and the pipe cleaning assembly includes a pneumatic ball valve and a pipe cleaning valve.

[0011] In the present utility model, the mixing storage bin assembly includes a storage bin, a mixer connected to the upper part of the storage bin, and a number of vacuum feeding hoppers connected above the mixer, and the feed pipe is connected to the vacuum feeding hopper at the upper part of the mixing storage bin assembly.

[0012] In the present utility model, the vacuum feeding hopper is connected to a negative pressure fan.

[0013] Preferably, the negative pressure fan is one of a vortex fan and a Roots blower.

[0014] Preferably, each negative pressure fan can undertake the feeding tasks of multiple vacuum feeding hoppers.

[0015] Preferably, a buffer hopper connecting the vacuum feeding hopper is arranged at the upper part of the mixer, and a screw metering feeder is arranged at the lower part of the mixer.

[0016] The batching system of a multi-layer co-extrusion film forming device of the present utility model is further provided with a bracket and a frame platform. Each of the multi-path distribution pipes is fixed on the bracket, and each of the mixing storage bin assemblies is respectively installed on the frame platform. And a bridge for fixing and supporting the material conveying pipe is arranged at a position above the mixing storage bin assemblies on the frame platform.

[0017] Preferably, there are multiple multi-layer co-extrusion film forming devices, and the batching system of the multi-layer co-extrusion film forming devices is a batching system simultaneously used for multiple multi-layer co-extrusion film forming devices.

[0018] In the present utility model, the several feeding stations are divided into two groups, and the two groups of feeding stations are arranged at intervals left and right; the bracket for fixing the multi-path distribution pipe is arranged at the front position between the two groups of feeding stations.

[0019] Preferably, the several feeding stations can also be arranged in other arrangements, which are specifically determined according to the site conditions.

[0020] In the present utility model, the frame platform is a double-layer frame platform with an upper platform and a lower platform. The mixing storage bin assemblies are arranged on the upper platform, and the multi-layer co-extrusion film forming devices and the screw extruders are arranged on the lower platform.

[0021] Preferably, the mixing storage bin assembly further includes a manual feeding hopper connected to the upper part of the storage bin.

[0022] In the present utility model, the raw materials from the feeding stations of the batching system are divided by the multi-path distribution pipes of the material distribution and delivery center, and then conveyed to each mixing storage bin assembly of the co-extrusion film feeding center through the batching conveying pipelines. Each mixing storage bin assembly conveys the prepared materials to the corresponding screw extruder. After the materials are melted and mixed in the screw extruder, they are sent into the co-extrusion film die at a relatively high pressure and extruded from the die orifice of the co-extrusion film die to form a hollow tubular film composed of multiple layers of different materials. Subsequently, it is further blown and processed in the multi-layer co-extrusion film forming device to form a multi-layer co-extrusion film product.

[0023] The beneficial effects of the present utility model are:

[0024] First, the batching system of a multi-layer co-extrusion film forming device of the present utility model realizes the automation of the batching of the multi-layer co-extrusion film forming device by setting a feeding center, a material distribution and delivery center, batching conveying pipelines and a co-extrusion film feeding center that are matched with the multi-layer co-extrusion film forming device. Thereby, the production efficiency of the multi-layer co-extrusion film is improved, and the quality stability of the multi-layer co-extrusion film production is improved.

[0025] Second, the batching system of a multi-layer co-extrusion film forming device of the present utility model can achieve automatic batching for multiple multi-layer co-extrusion film forming devices by setting up a material distribution center and combining it with the batching conveying pipeline, thereby further improving the efficiency of the batching system.

[0026] Third, for the batching system of a multi-layer co-extrusion film forming device of the present utility model, a pipe cleaning valve assembly is provided on the material conveying pipe of the batching conveying pipeline, which greatly facilitates the cleaning of the pipeline system.

[0027] Fourth, for the batching system of a multi-layer co-extrusion film forming device of the present utility model, the use of a double-layer rack platform can make the layout more compact and facilitate subsequent film blowing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the batching system of a multi-layer co-extrusion film forming device of the present utility model;

[0029] Figure 2 is Figure 1 a schematic structural diagram of the material distribution center in

[0030] Figure 3 is Figure 1 a schematic structural diagram of the pipe cleaning component in

[0031] Figure 4 is Figure 3 a partial enlarged view of the right half in

[0032] Figure 5 is Figure 4 a schematic structural diagram of the mixing storage bin component in

[0033] In the figure: 100, batching system; 101, feeding center; 102, material distribution center; 103, batching conveying pipeline; 104, co-extrusion film feeding center; 105, feeding station; 106, multi-path distribution pipe; 107, feed pipe; 108, discharge pipe; 109, mixing storage bin component; 110, material conveying pipe; 111, storage bin; 112, pipe cleaning component; 113, pneumatic ball valve; 114, pipe cleaning valve; 115, vacuum feeding hopper; 116, negative pressure fan; 117, buffer hopper; 118, screw metering feeder; 119, support; 120, rack platform; 121, bridge; 122, upper platform; 123, lower platform; 124, manual feeding hopper.

[0034] In the figure: A is the installation position of the screw extruder and the multi-layer co-extrusion film die. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following further describes the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and cannot be used to limit the protection scope of the present utility model.

[0036] As Figures 1 to 5 shown in the figure is an embodiment of a batching system 100 of a multi-layer co-extrusion film forming device of the present utility model, including a feeding center 101, a material distribution and delivery center 102, a batching conveying pipeline 103, and a co-extrusion film feeding center 104 that are correspondingly arranged according to the batching process; the feeding center 101 includes a plurality of feeding stations 105; the material distribution and delivery center 102 includes a plurality of multi-path distribution pipes 106, the multi-path distribution pipe 106 includes a feed pipe 107 and a plurality of discharge pipes 108 connected to the feed pipe 107, and the feed pipe 107 on the multi-path distribution pipe 106 is connected to one of the feeding stations 105 in the feeding center 101; the co-extrusion film feeding center 104 includes a plurality of screw extruders (not shown in the figure) connected to a co-extrusion film die 301 of the multi-layer co-extrusion film forming device, and a plurality of mixing storage bin assemblies 109 that supply materials to each of the screw extruders respectively; the batching conveying pipeline 103 includes a conveying pipe assembly composed of a plurality of conveying pipes 110 that are correspondingly connected to each of the mixing storage bin assemblies 109, and each of the conveying pipes 110 in the same conveying pipe assembly is respectively connected to the discharge pipes 108 of different multi-path distribution pipes 106 in the material distribution and delivery center 102.

[0037] Preferably, the multi-layer co-extrusion film forming device is one of a seven-layer co-extrusion film device, a nine-layer co-extrusion film device, and an eleven-layer co-extrusion film device.

[0038] Preferably, the multi-path distribution pipe 106 has one feed pipe 107 and four discharge pipes 108.

[0039] In the above batching conveying pipeline 103, for the same or different multi-layer co-extrusion film forming devices, correspondingly, the number of conveying pipes in each group of conveying pipe assemblies can be the same or different.

[0040] Preferably, the batching conveying pipeline 103 further includes a pipe cleaning assembly 112 provided on the conveying pipe 110, and the pipe cleaning assembly 112 includes a pneumatic ball valve 113 and a pipe cleaning valve 114.

[0041] In this embodiment, the mixing storage bin assembly 109 includes a storage bin 111, a mixer connected to the upper part of the storage bin 111, and a plurality of vacuum feeding hoppers 115 connected above the mixer, and the conveying pipe 110 is connected to the vacuum feeding hopper 115 at the upper part of the mixing storage bin assembly 109.

[0042] In this embodiment, the vacuum hopper 115 is connected to a negative pressure fan 116.

[0043] Preferably, the negative pressure fan 116 is one of a vortex fan and a Roots blower.

[0044] Preferably, each negative pressure fan 116 can undertake the feeding tasks of multiple vacuum hoppers.

[0045] Preferably, a buffer hopper 117 connected to the vacuum hopper 115 is provided at the upper part of the mixer, and a screw metering feeder 118 is provided at the lower part of the mixer.

[0046] The batching system 100 of a multi-layer coextrusion film forming device in this embodiment is further provided with a bracket 119 and a frame platform 120. Each multi-path distribution pipe 106 is fixed on the bracket 119, and each mixing and storage bin assembly 109 is respectively installed on the frame platform 120. And a bridge 121 for fixing and supporting the conveying pipe 110 is provided at a position above the mixing and storage bin assembly 109 on the frame platform 120.

[0047] Preferably, there are multiple multi-layer coextrusion film forming devices, and the batching system 100 of the multi-layer coextrusion film forming devices is a batching system simultaneously used for multiple multi-layer coextrusion film forming devices.

[0048] In this embodiment, the several feeding stations 105 are divided into two groups, and the two groups of feeding stations 105 are arranged at intervals left and right; the bracket 119 for fixing the multi-path distribution pipe 106 is arranged at the front position between the two groups of feeding stations 105.

[0049] Preferably, the several feeding stations 105 can also be arranged in other arrangements, which are specifically determined according to the site conditions.

[0050] In this embodiment, the frame platform 120 is a double-layer frame platform having an upper platform 122 and a lower platform 123. The mixing and storage bin assembly 109 is arranged on the upper platform 122, and the multi-layer coextrusion film forming device and the screw extruder are arranged on the lower platform 123.

[0051] Preferably, the mixing and storage bin assembly 109 further includes a manual feeding hopper 124 connected to the upper part of the storage bin 111.

[0052] In this embodiment, the raw materials from the feeding station 105 of the batching system 100 are distributed through the multi-channel distribution pipe 106 of the distribution and delivery center 102, and then transported through the batching conveying pipeline 103 into each mixing storage bin assembly 109 of the co-extrusion film feeding center 104. Each mixing storage bin assembly 109 transports the prepared materials to the corresponding screw extruder. After the materials are melted and mixed in the screw extruder 125, they are sent into the co-extrusion film die at a relatively high pressure and extruded from the die orifice of the co-extrusion film die to form a hollow tubular film composed of multiple layers of different materials. Subsequently, it is further blown and processed in the multi-layer co-extrusion film forming equipment to form a multi-layer co-extrusion film product.

[0053] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A batching system for a multi-layer co-extrusion film forming device, characterized in that: It includes a feeding center, a material distribution center, a material distribution pipeline and a co-extrusion film supply center which are arranged according to the material distribution process; the feeding center includes a number of feeding stations; the material distribution center includes a number of multi-channel distribution pipes, the multi-channel distribution pipe includes a feed pipe and a plurality of discharge pipes connected to the feed pipe, the feed pipe on the multi-channel distribution pipe is connected to one of the feeding stations in the feeding center; the co-extrusion film supply center includes a number of screw extruders connected to the co-extrusion film mold of the multi-layer co-extrusion film forming equipment for realizing multi-layer film co-extrusion, and a number of mixed storage bin assemblies for supplying materials to each of the screw extruders; the material distribution pipeline includes a feed pipe assembly composed of a number of feed pipes connected to each of the mixed storage bin assemblies, and each feed pipe in the same feed pipe assembly is respectively connected to the discharge pipes belonging to different multi-channel distribution pipes in the material distribution center.

2. The batching system of a multi-layer co-extrusion film forming equipment according to claim 1, characterized in that: The multi-layer co-extrusion film forming equipment is one of a seven-layer co-extrusion film equipment, a nine-layer co-extrusion film equipment, and an eleven-layer co-extrusion film equipment.

3. The batching system of a multi-layer co-extrusion film forming equipment according to claim 1, characterized in that: The batching conveying pipeline further comprises a pipe cleaning assembly arranged on the material conveying pipe, and the pipe cleaning assembly comprises a pneumatic ball valve and a pipe cleaning valve.

4. The batching system of a multi-layer co-extrusion film forming equipment according to claim 1, characterized in that: The mixed material storage bin assembly comprises a material storage bin and a mixer connected to the upper part of the material storage bin, and a plurality of vacuum hoppers connected above the mixer, and the feed pipe is connected to the vacuum hopper on the upper part of the mixed material storage bin assembly.

5. The batching system of a multi-layer co-extrusion film forming equipment according to claim 4, characterized in that: The vacuum loading hopper is connected to a negative pressure fan.

6. The batching system of a multi-layer co-extrusion film forming equipment according to claim 4, characterized in that: The upper part of the mixer is provided with a buffer hopper connected to the vacuum upper hopper, and the lower part of the mixer is provided with a spiral metering feeder.

7. The batching system of a multi-layer co-extrusion film forming equipment according to claim 1, characterized in that: A bracket and a frame platform are also provided, each of the multi-channel distribution pipes is fixed on the bracket, each of the mixed storage bin assemblies is respectively installed on the frame platform, and a bridge frame for fixing and supporting the material conveying pipe is provided on the frame platform at a position above the mixed storage bin assembly.

8. The batching system of a multi-layer co-extrusion film forming equipment according to claim 1, characterized in that: There are multiple multi-layer co-extrusion film forming devices, and the batching system of the multi-layer co-extrusion film forming device is a batching system used for multiple multi-layer co-extrusion film forming devices at the same time.

9. The batching system of a multi-layer co-extrusion film forming device according to claim 7, characterized in that: The plurality of feeding stations are divided into two groups and the two groups of feeding stations are arranged in a left-right spacing manner; the bracket for fixing the multi-channel distribution pipe is arranged at the front position between the two groups of feeding stations.

10. The batching system of a multi-layer co-extrusion film forming device according to claim 7, characterized in that: The frame platform is a double-layer frame platform having an upper platform and a lower platform, the mixing storage bin assembly is arranged on the upper platform, and the multi-layer co-extrusion film forming equipment and the screw extruder are arranged on the lower platform.

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