CN121200378A - A centrally stacked blown film mold and blown film machine - Google Patents
A centrally stacked blown film mold and blown film machineInfo
- Publication number
- CN121200378A CN121200378A CN202511690236.7A CN202511690236A CN121200378A CN 121200378 A CN121200378 A CN 121200378A CN 202511690236 A CN202511690236 A CN 202511690236A CN 121200378 A CN121200378 A CN 121200378A
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- annular
- mold
- channel
- blown film
- stacked
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Abstract
本申请实施例提供了一种中心叠加式吹膜模具及吹膜机，包括：锥度底模；模柱，设于底膜上；多个环形模具，多个环形模具层层堆叠套设；相邻环形模具的侧壁之间形成有环形流道；模头组件，模头组件上设有环形的出料流道，模头组件的顶面上设有环形的出料口，多道环形流道在模头组件的底面上相聚；至少一条进料流道，与至少一条环形流道相连通；环形流道包括中间流道，其他环形流道位于中间流道的两侧，第一进料流道与中间流道相连接；分布于中间流道两侧的环形流道共同与第二进料流道相连接。本申请的技术方案中，多条环形流道可共用一条进料流道及供料装置进行进料，减少了需配套的供料装置的数量，降低了吹膜机的成本，故障率也有所降低。
This application provides a center-stacked blown film mold and blown film machine, including: a tapered bottom mold; a mold column disposed on the bottom mold; multiple annular molds stacked in layers; annular flow channels formed between the side walls of adjacent annular molds; a mold head assembly with annular discharge channels and annular discharge port on the top surface of the mold head assembly; multiple annular flow channels converging on the bottom surface of the mold head assembly; at least one feed channel connected to at least one annular flow channel; the annular flow channels include a central flow channel, with other annular flow channels located on both sides of the central flow channel, and a first feed channel connected to the central flow channel; the annular flow channels distributed on both sides of the central flow channel are connected to a second feed channel. In the technical solution of this application, multiple annular flow channels can share a single feed channel and feeding device for feeding, reducing the number of supporting feeding devices, lowering the cost of the blown film machine, and reducing the failure rate.
Description
Technical Field
The application relates to the technical field of film blowing dies, in particular to a center-stacked film blowing die and a film blowing machine.
Background
Nowadays, the application scene of plastic films is wider and wider, the films are usually manufactured by a coextrusion film blowing machine, and a core component on the film blowing machine is a film blowing die. Typically, the number of layers of film and the material of each layer may be different in order to obtain films of different properties, and the number of layers of the film blowing die determines the number of layers of film produced. Taking a film with a five-layer structure as an example, a film blowing mold for producing the film has a five-layer structure.
For the film blowing mold, each layer of mold structure is required to be correspondingly provided with a feeding runner and a set of feeding devices, which makes the structure of the film blowing machine more complex, the cost of the film blowing machine is higher, and the failure rate is higher.
Disclosure of Invention
In view of the above problems, the present application has been made to solve the above problems, or at least partially solve the above problems, of a center stack type film blowing die and a film blowing machine.
In one embodiment of the present application, there is provided a center stack film blowing die comprising:
taper bottom die;
the first end of the die column is arranged on the bottom film;
The annular molds are stacked and sleeved layer by layer in a mode that the large-diameter annular molds are sleeved outside the small-diameter annular molds, and annular flow passages are formed between the side walls of the adjacent annular molds;
The die head assembly is arranged at the second end of the die column, the end parts of the plurality of annular dies are abutted against the bottom surface of the die head assembly, an annular discharge flow passage is arranged on the die head assembly, an annular discharge port is arranged on the top surface of the die head assembly, the first end of the discharge flow passage is connected with the discharge port, and a plurality of annular flow passages are gathered on the bottom surface of the die head assembly and are connected with the second end of the discharge flow passage;
At least one feed runner in communication with at least one of the annular runners;
The annular flow channels are distributed according to different layer numbers along the radial direction of the die column, each annular flow channel comprises a middle flow channel, the other annular flow channels are positioned at two sides of the middle flow channel, and the first feeding flow channel is connected with the middle flow channel;
the other feeding runner is jointly connected with one group of annular runners distributed on two sides of the middle runner.
Optionally, one group of annular flow channels distributed on two sides of the middle flow channel is symmetrically distributed by taking the middle flow channel as a central line.
Optionally, the annular runner includes annular section and gathers together the section, the annular section along parallel with the direction of the die pillar axis extends, gather together the section by the one end of annular section to the ejection of compact runner second end extends.
Optionally, the taper bottom die comprises a truncated cone structure and a frustum structure, and the frustum structure is arranged on the truncated cone structure;
The feeding runner comprises a feeding main runner and a feeding branch runner, the feeding main runner is positioned on the circular truncated cone structure, and the feeding branch runner is positioned on the frustum structure and/or the die column;
the feeding branch flow passages are respectively communicated with different annular flow passages at two sides of the middle flow passage.
Optionally, the frustum structure is provided with a plurality of step surfaces, and the end parts of the bottom ends of the different annular molds are respectively abutted with the different step surfaces.
Optionally, the device further comprises an interface component, wherein the interface component is arranged on the outer wall of the die, and the feeding runner is connected with the interface component.
Alternatively, the annular runner may be tapered from one end toward the other end in the axial direction of the mold.
Optionally, the die assembly has a diameter greater than the diameter of the die.
Optionally, a first connecting portion is disposed on the bottom surface of the die head assembly, a second connecting portion is disposed on the die that is abutted to the die head assembly, and the first connecting portion can be connected with the second connecting portion in a matching manner.
In another embodiment, a film blowing machine is provided, the film blowing machine comprising:
The equipment body is provided with a plurality of air inlets,
The central superposition type film blowing die is arranged on the equipment body;
and each feeding flow channel is connected with one feeding device.
In the technical scheme of the embodiment of the application, the feeding runners are arranged in the die with the multi-layer lamination arrangement, the feeding runners can respectively feed to the annular runners at the two sides of the middle runner at the same time, the plurality of annular runners can share one feeding runner and one feeding device for feeding, and each annular runner is not required to be correspondingly provided with one feeding runner, so that the number of the feeding runners is reduced, the number of the feeding devices connected with the feeding runners can be correspondingly reduced, the equipment cost of the whole film blowing machine is reduced, and the probability of equipment failure is also reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of a central stacked film blowing mold according to an embodiment of the present application;
FIG. 2 is a top view of a center stack film blowing die according to an embodiment of the present application;
FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;
Fig. 4 is a sectional view in the direction B-B of fig. 2.
Reference numerals illustrate:
Taper bottom die 1, round bench structure 13, taper bench structure 14, die post 2, annular die 3, die head assembly 4, discharge runner 5, annular runner 6, annular segment 601, gathering segment 602, intermediate runner 61, second annular runner 62, third annular runner 63, fourth annular runner 64, fifth annular runner 65, feed runner 7, feed trunk runner 701, feed branch runner 702, first feed runner 70, second feed runner 71, third feed runner 72, interface assembly 8, first connection 9, second connection 10, discharge port 11.
Detailed Description
In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present application with reference to the accompanying drawings.
The described embodiments of the application are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect. In addition, in the embodiment of the present application, plural means two or more. Those skilled in the art may combine and combine the features of the different embodiments or examples described in this specification and of the different embodiments or examples without contradiction. The terms "first," "second," and the like herein are used for distinguishing between different directions, structures, elements, etc., and not for describing a sequential order. In addition, the embodiments described below are only some, but not all, of the embodiments of the present application.
The production of the plastic film is mainly realized through a film blowing machine, the film blowing machine mainly comprises an equipment body, a film blowing die and a feeding device, the film blowing die is provided with corresponding feeding flow passages, each feeding flow passage is correspondingly connected with one feeding device, and the feeding device can provide film production raw materials for the feeding flow passages. In order to make the plastic film have different functions and performances, the plastic film generally has a multi-layer structure, and the number of layers of the film is determined by the number of layers of the film blowing mold, for example, when the plastic film with a five-layer structure needs to be produced, the blowing mold needs to have five layers of molds, each layer of molds needs to be provided with corresponding annular runners, after the raw materials provided by the feeding runners enter the annular runners, the raw materials are fully heated, finally the annular runners of different layers are converged into the discharging runners, and the raw materials mixed in the discharging runners can be output from the discharging port to form the processed plastic film.
Generally, the annular runner on each layer of mould corresponds to be connected with a feeding runner, and each feeding runner all needs to set up a corresponding feed arrangement, when the layer number of inflation film manufacturing mould is too many, can necessarily cause feed arrangement's quantity to increase the holistic equipment cost of inflation film manufacturing machine, and because the quantity of feed arrangement is more, the probability that feed arrangement breaks down is also big, and inflation film manufacturing machine is very easy because of the film manufacturing machine trouble causes the film disqualification of production.
In order to solve the above technical problems as far as possible, referring to fig. 1 to 4, in one embodiment of the present application, a center stack film blowing mold is provided, which includes a tapered bottom mold 1, a mold pillar 2, a plurality of annular molds 3, a die assembly 4, and at least one feed runner 7. The first end of the die column 2 is arranged on the bottom film, and the die column 2 is a main core bone of the whole film blowing die and is used for stabilizing the whole film blowing die. The taper bottom die 1 is provided with a frustum structure 14 on one side facing the die column 2, and the die column 2 is arranged at the top of the frustum structure 14.
The annular mold 3 is of a cylindrical annular structure, the diameters of the annular molds 3 are sequentially increased, the annular molds 3 and the mold columns 2 are coaxially arranged, and the annular molds 3 are stacked layer by layer in a mode that the large-diameter annular mold 3 is sleeved outside the small-diameter annular mold 3. Specifically, the large-diameter annular mold 3 is sleeved outside the annular mold 3 with a small diameter, the annular mold 3 with the smallest diameter is sleeved outside the mold column 2, and the annular molds 3 with different diameters are sleeved layer by layer to form a multi-layer structure from outside to inside.
An annular runner 6 is formed between the side walls of adjacent annular molds 3, and an annular runner 6 is also formed between the inner wall of the annular mold 3 with the smallest diameter positioned at the innermost side and the outer wall of the mold column 2. It is understood that one layer of annular mold 3 corresponds to one layer of annular runner 6, and a plurality of annular runners 6 are also arranged at intervals layer by layer.
The die head assembly 4 is arranged at the second end of the die column 2, the die head assembly 4 and the taper bottom die 1 are arranged at two sides of the die set, and the die head assembly 4 and the taper bottom die 1 are arranged oppositely. The ends of the plurality of annular molds 3 are abutted against the bottom surface of the die head assembly 4, and the other ends of the plurality of annular molds 3 are abutted against the bottom surface of the tapered bottom die 1.
The die head assembly 4 is provided with an annular discharge flow passage 5, the top surface of the die head assembly 4 is provided with an annular discharge port 11, a first end of the discharge flow passage 5 is connected with the discharge port 11, and a plurality of annular flow passages 6 are mutually gathered on the bottom surface of the die head assembly 4 and are connected with a second end of the discharge flow passage 5. After the materials enter different annular flow channels 6, the materials can flow along the annular direction to the discharging flow channel 5, and the annular flow channels 6 of the multiple channels are converged at one end of the discharging flow channel 5. The materials in the plurality of annular flow channels 6 can enter the discharge flow channel 5 at the same time to form a film base material with a multilayer structure, and after being extruded from the discharge hole 11, the base material can be stretched to form a cylindrical plastic film with the multilayer structure.
In one embodiment, a plastic film includes five layers, the first layer is made of PE (Polyethylene), the second layer is made of TIE (Thermoplastic Polyester Elastomer ), the third layer is made of PA (Polyamide, nylon), the fourth layer is made of TIE (Thermoplastic Polyester Elastomer ), and the fifth layer is made of PE (Polyethylene), so that the blown film annular mold 3 required for producing the plastic film needs to have five layers of annular molds 3, and the annular runners 6 in each layer of annular molds 3 are respectively supplied with PE, TIE, PA, TIE and PE materials. These materials can be heated fully by the annular mould 3 in the annular runner 6 to obtain better fluidity, then can be stacked in sequence in the discharge runner 5 after entering the discharge runner 5 from the annular runner 6, and finally, the plastic film with a five-layer structure of layered materials can be formed conveniently.
In order to facilitate the entry of the added material into the annular flow channel 6, the feed flow channel 7 is in communication with at least one annular flow channel 6, see fig. 3 to 4, and the feeding device may feed material into the annular flow channel 6 through the feed flow channel 7.
Wherein, along the radial direction of the mold pillar 2, different annular runners 6 are distributed according to different layers, the annular runners 6 comprise middle runners 61, other annular runners 6 are positioned at two sides of the middle runners 61, and the first feeding runner 7 is connected with the middle runners 61. Specifically, when the film blowing mold includes the multi-layer annular mold 3, each layer of annular mold 3 has one layer of annular runners 6, and then the multi-layer annular runners 6 are located at different layer number positions, respectively. The annular runners 6 are arranged at intervals along the radial direction of the mold column 2, the annular runners 6 at the middle position are middle runners 61, and other annular runners 6 are distributed on two sides of the middle runners 61.
One group of annular flow passages 6 distributed on both sides of the intermediate flow passage 61 are commonly connected with the second feeding flow passage 7. Specifically, the distances between the second annular flow channel 62 and the third annular flow channel 63 located at two sides of the middle flow channel 61 and the middle flow channel 61 may be the same or different, the second feeding flow channel 71 is connected with the second annular flow channel 62 and the third annular flow channel 63, and the second feeding flow channel 71 may provide materials such as plastics to the second annular flow channel 62 and the third annular flow channel 63.
Since the annular molds 3 corresponding to the second annular runner 62 and the third annular runner 63 are located at both sides of the annular mold 3 corresponding to the intermediate runner 61, the second feeding runner 71 needs to traverse at least the annular mold 3 corresponding to the intermediate runner 61 when being connected to the second annular runner 6 and the third annular runner 6. The second feed runner 71 is not in communication with the intermediate runner 61 while traversing the annular mold 3 corresponding to the intermediate runner 61.
Of course, when the center stack film blowing die further includes the fourth annular runner 64 and the fifth annular runner 65, the third feed runner 72 may be connected to the fourth annular runner 64 and the fifth annular runner 65, respectively. With such pushing, when the center stack film blowing mold further includes a sixth annular runner and a seventh annular runner, the fourth feeding runner may be connected with the sixth annular runner and the seventh annular runner, respectively, the fourth feeding runner being disposed across the multilayer annular mold 3.
In the technical scheme provided by the application, by arranging the feeding runners 7 in the annular die 3 which is arranged in a multi-layer lamination manner, part of the feeding runners 7 can respectively feed to the annular runners 6 at two sides of the middle runner 61 at the same time, and each annular runner 6 does not need to be correspondingly provided with one feeding runner 7, so that the number of the feeding runners 7 is reduced, the number of feeding devices connected with the feeding runners 7 can be correspondingly reduced, the equipment cost of the whole film blowing machine is reduced, and the probability of equipment failure is also reduced.
In one embodiment of the present application, one set of annular channels 6 distributed on both sides of the middle channel 61 may be symmetrically distributed with the middle channel 61 as a central line. For example, the second annular flow passage 62 and the third annular flow passage 63 are spaced at the same distance from the intermediate flow passage 61, and the second annular flow passage 62 and the third annular flow passage 63 are symmetrical with the intermediate flow passage 61 as a center line.
It should be noted that, a group of annular flow passages 6 distributed on both sides of the middle flow passage 61 is symmetrically arranged with the middle flow passage 61 as a center line, and only the symmetry indicating the positional relationship thereof may be the same or different in shape and structure. For example, the second annular flow passage 62 is different in width from the third annular flow passage 63, and the second annular flow passage 62 is different from the third annular flow passage 63 in the amount of material entering the discharge flow passage 5.
Referring to fig. 2 and 3, in one embodiment of the present application, the annular runner 6 includes an annular section 601 and a converging section 602, the annular section 601 extends in a direction parallel to the central axis of the mold pillar 2, and the converging section 602 extends from one end of the annular section 601 to the second end of the discharge runner 5. The material can flow under pressure along the annular section 601 towards the converging section 602 and finally into the discharge channel 5. The converging sections 602 of the plurality of annular flow channels 6 converge at and are connected to the second end of the discharge channel.
In order to facilitate the arrangement of the feeding flow channel 7, in one embodiment provided by the present application, the tapered bottom die 1 includes a truncated cone structure 13 and a truncated cone structure 14, and the truncated cone structure 14 is disposed on the truncated cone structure 13. The feeding flow channel 7 includes a feeding main flow channel 701 and a feeding branch flow channel 702, one feeding main flow channel 701 may be connected to a plurality of feeding branch flow channels 702 respectively, a plurality of feeding branch flow channels 702 may be connected to one of the annular flow channels 6, or different feeding branch flow channels 702 may be connected to different annular flow channels 6, for example, the feeding branch flow channels 702 are respectively communicated with different annular flow channels 6 on two sides of the middle flow channel 61.
In one embodiment, the feed trunk flow channel 701 is located on the frustoconical structure 13, the feed branch flow channel 702 is located on the frustoconical structure 14, or a portion of the feed branch flow channel 702 is located on the frustoconical structure 14, and another portion is located on the mold pillar 2.
In order to facilitate positioning and installation of the plurality of annular molds 3, referring to fig. 3 and 4, in an embodiment provided by the present application, the frustum structure 14 has a plurality of stepped surfaces, and ends of bottom ends of different annular molds 3 respectively abut against different stepped surfaces. The width of the stepped surface is approximately equal to the thickness of the annular mold 3. Since the different step surfaces have different step heights, this makes the heights of the ring mold 3 abutting against the different step surfaces different. The annular mold 3 that is in contact with the step surface of the lowest step height is highest in height, and the annular mold 3 that is in contact with the step surface of the highest step height is lowest in height.
In the technical scheme provided by the application, each annular mold 3 is arranged corresponding to one step surface, and the heights of the annular molds 3 are sequentially increased. Therefore, the quick arrangement and installation of the plurality of annular molds 3 are facilitated, the annular molds 3 are installed corresponding to the step surfaces, the installation accuracy is higher, and the stability is better.
For convenience, the feeding device feeds the material into the feeding runner 7, and in one embodiment provided by the application, the center stack type film blowing die further comprises an interface component 8, the interface component 8 is arranged on the outer wall of the bottom die, and the feeding runner 7 is connected with the interface component 8. The feed device is a feed extruder which applies a pressure to the material such that the material is extruded into the feed channel 7.
Further, an interface assembly 8 is provided in correspondence with a feed channel 7. When the center stack type film blowing die is provided with a plurality of interface assemblies 8, different interface assemblies 8 are arranged at different positions of the outer walls of the circular truncated cone structures 13 of different bottom dies. The interface components 8 arranged at different positions can be conveniently connected with different feeding devices, so that the flexibility of equipment arrangement is improved, and the mutual interference of the setting positions of the different feeding devices is avoided.
Further, in the axial direction of the annular mold 3, the annular runner 6 gradually becomes smaller in diameter from one end toward the other end of the annular runner 6.
In one embodiment provided by the application, the diameter of the die head assembly 4 is larger than the diameter of the annular die 3 with the largest diameter, the value range of the ratio of the diameter of the die head assembly 4 to the diameter of the annular die 3 is [ 1-1.5 ], and the installation of the whole center stack type film blowing die is facilitated by expanding the diameter of the die head assembly 4.
In order to facilitate the stable fit connection of the die head assembly 4 and the annular die 3, a first connecting part 9 is arranged on the bottom surface of the die head assembly 4, a second connecting part 10 is arranged on the annular die 3 abutted against the die head assembly 4, and the first connecting part 9 can be in fit connection with the second connecting part 10. For example, the first connecting portion 9 is a groove, and the second connecting portion 10 is a protrusion structure, and the protrusion structure can be cooperatively connected in the groove structure. Thereby enhancing the connection stability of the die assembly 4 and the annular mold 3.
In one embodiment of the application, a film blowing machine is provided, which comprises a device body, a feeding device and the center-stacked film blowing die
The central superposition type film blowing die is arranged on the equipment body, each feeding runner 7 is connected with a feeding device, and the feeding device can be used for feeding plastic materials for the feeding runners 7. For example, the feeding device is an extruder, after a user adds material to the extruder, the extruder can extrude the material into the feeding flow channel 7, then the material enters the annular flow channel 6 along the feeding flow channel 7, and along with the flow of the material, the material amount further flows into the discharging flow channel 5, and finally is output from the discharging port 11.
In the technical scheme of the embodiment of the application, the feeding runners are arranged in the die with the multi-layer lamination arrangement, the feeding runners can respectively feed to the annular runners at the two sides of the middle runner at the same time, the plurality of annular runners can share one feeding runner and one feeding device for feeding, and each annular runner is not required to be correspondingly provided with one feeding runner, so that the number of the feeding runners is reduced, the number of the feeding devices connected with the feeding runners can be correspondingly reduced, the equipment cost of the whole film blowing machine is reduced, and the probability of equipment failure is also reduced.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511690236.7A CN121200378A (en) | 2025-11-18 | 2025-11-18 | A centrally stacked blown film mold and blown film machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511690236.7A CN121200378A (en) | 2025-11-18 | 2025-11-18 | A centrally stacked blown film mold and blown film machine |
Publications (1)
| Publication Number | Publication Date |
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| CN121200378A true CN121200378A (en) | 2025-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202511690236.7A Pending CN121200378A (en) | 2025-11-18 | 2025-11-18 | A centrally stacked blown film mold and blown film machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN121200378A (en) |
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- 2025-11-18 CN CN202511690236.7A patent/CN121200378A/en active Pending
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