Stone-based carton preparation method and molding equipment thereof

Abstract

The invention discloses a stone-based carton preparation method and molding equipment thereof, the molding equipment comprises an extruder used for heating, mixing and extruding raw materials, the output end of the extruder is provided with an extrusion pipe, and the tail end of the extrusion pipe is connected with a corrugated forming mold and a paper forming mold; according to the production process, the single-layer paper with the fixed size and shape and the corrugated paper are subjected to direct injection molding, finally, the stone-based corrugated carton is formed through compounding, the size of the paper is directly fixed through discharging from a mold, direct production is achieved, waste of materials is reduced, the recycling difficulty is improved, and the production cost is reduced. The problems that an existing rich mineral paper material is firstly subjected to paper forming, then is compounded and finally is cut, or is compounded and then is cut to produce a packaging box with the required size and shape, so that a large number of cutting excess materials are caused, and the rich mineral paper is not convenient to recover as conventional paper is not convenient to recover are effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of stone-based cartons, and in particular to a method for preparing a stone-based carton and a molding device thereof. Background Art

[0002] At present, traditional carton production mainly relies on paper made from wood pulp. However, with the improvement of global environmental protection awareness, the wood resources used in the paper production process are gradually limited. In addition, the traditional carton production process requires large sheets of paper to be pasted and cut into the required shape, which will result in a large amount of cutting waste. Although the traditional paper recycling industry is relatively sound, paper recycling also faces certain difficulties.

[0003] For this reason, stone paper has gradually entered the market as a new type of environmentally friendly material. Stone paper is made of minerals such as calcium carbonate, has good waterproof, wear-resistant and environmentally friendly properties, and does not require the use of wood in the production process, which can greatly reduce dependence on forest resources. However, in the existing stone paper corrugated box production process, it is usually necessary to first make stone paper into paper separately, and then carry out subsequent cutting and compounding. In this process, a large amount of cutting waste is still generated, which increases material waste and production costs. At the same time, due to the special physical properties of stone paper, the same volume of stone paper waste is compared with traditional paper waste. Compared with traditional paper, its recycling process is more complicated and not conducive to recycling. In view of the above problems, a stone-based paper box preparation method and its forming equipment are specially proposed. Summary of the invention

[0004] The object of the present invention is to provide a stone-based carton preparation method and a molding device thereof to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method for preparing a stone-based carton and a molding device thereof, comprising an extruder for heating, mixing and extruding raw materials, an extrusion tube being installed at the output end of the extruder, and a corrugated forming mold and a paper forming mold being connected to the end of the extrusion tube; the corrugated forming mold and the paper forming mold are externally equipped with a locking mechanism; the corrugated forming mold comprises several layers of pad one, the top of the pad one is equipped with a bottom mold, the bottom of the pad one is equipped with a top mold, and the outer sides of the top mold and the bottom mold are equipped with side frames; the paper forming mold comprises several layers of pad two, and the inner sides of two adjacent layers of the pad two are clamped and equipped with paper frames; the top mold is composed of several mold strips two arranged side by side, and the bottom shape of the mold strips two is the same as the trough shape of the corrugated paper; the bottom mold is composed of several mold strips one arranged side by side, and the top shape of the mold strip one is the same as the peak shape of the corrugated paper.

[0006] Preferably, the locking mechanism includes a gasket and a clamp, the outer sides of the gasket and the clamp are clamped with a locking strip, the outer side of the locking strip is penetrated by a locking rod, and both ends of the locking rod are threaded with fixing nuts, and the fixing nuts are clamped and fixed on the outer side of the locking strip.

[0007] Preferably, a base is installed at the bottom of the cushion strip, and the base and the cushion strip are assembled and fixed together, so that the cushion strip can be assembled and disassembled through the fixing member and the base.

[0008] Preferably, the inner dimensions of the side frame and the paper frame are the same.

[0009] Preferably, a threaded hole is provided on the back of the second mold bar.

[0010] Preferably, a threaded hole is provided on the back of the mold strip 1.

[0011] Preferably, the backing plate 1 is divided into two layers, and round holes are evenly opened on the inner side of the backing plate 1, and countersunk screws are installed inside the round holes, and the countersunk screws are screwed on the back of the mold strip 1 or the mold strip 2.

[0012] Preferably, the outer side walls of the side frame and the paper frame are provided with exhaust holes.

[0013] Preferably, a clamping plate is provided between the clamping strip and the cushion strip.

[0014] Preferably, injection holes are provided on the outside of the backing plate 2 and the backing plate 1, and chamfers are provided on the outsides of the injection holes.

[0015] A method for preparing a stone-based carton, comprising the following methods: Step A: preparing a mold, determining the size of the stone-based carton, and then cutting a mold strip 271 and a mold strip 281 according to the size of the paper side frame 29 and the paper frame 32, and assembling a plurality of mold strips 271 and a mold strip 281 into one piece according to the size of the stone-based carton, and applying an anti-adhesion coating between the gaps between the mold strips 1 271 and the mold strips 281 for use; Step B: preparing a formula, Formula ①: preparing 60%-70% calcium carbonate, 25%-30% high-density polyethylene, 2%-5% smooth coating additives, 0.5%-1% ultraviolet absorbers and 1% coupling agents as the outer packaging layer formula of the stone paper; Formula ②: preparing 75%-85% calcium carbonate, 10%-15% polypropylene, 1%-2% foaming agent, and 2%-3% reinforcing fiber as the corrugated layer formula of the stone-based carton; Formula ③: Prepare 60%-70% calcium carbonate, 20%-25% low-density polyethylene, 3%-5% oil-resistant coating additives and 1%-2% antibacterial agent as the inner packaging layer formula of the stone-based carton; Step C: Production preparation. Before production, all molds are fixed inside the locking mechanism according to the outer packaging, corrugated paper layer and inner packaging of the stone-based carton, and several sets are combined for use in turn. They are connected and fixed to the output pipe of the injection molding machine before use; Step D: Molding production. According to the production process, a single set of molds is used as a unit. The same cavity is combined inside the three single sets of molds for producing outer packaging, corrugated paper layer and inner packaging. Then each injection molding unit is connected to a separate extruder. The separate extruders mix and heat the corresponding formulas respectively, and finally directly mold the outer packaging, corrugated paper layer and inner packaging of the same size as the desired carton inside the corresponding mold unit; Step E: Composite molding, heating and compounding the outer packaging, the corrugated paper layer and the two inner joints of the inner packaging after removing the excess pouring nozzles to finally form a stone-based carton of the desired size and shape.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a production process of directly injecting single-layer paper and corrugated paper with fixed size and shape, and finally compounding to form a stone-based corrugated paper box. By starting from the mold, the size of the paper is directly fixed, and direct production is carried out, which reduces material waste and improves the difficulty of recycling. It effectively solves the problem that the existing stone paper material is first formed into paper, then compounded and finally cut, or compounded and then cut to produce packaging boxes of the required size and shape, resulting in a lot of cutting waste, and the recycling of stone paper is not as convenient as conventional paper recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2It is a schematic diagram of the assembly of the corrugated forming mold of the present invention; Figure 3 It is a schematic diagram of the structure of the paper forming mold of the present invention; Figure 4 It is a schematic diagram of the structure of the paper forming mold of the present invention; Figure 5 for Figure 2 A magnified schematic diagram of the structure at point a.

[0018] In the figure: 1, extruder, 2, corrugated forming mold, 21, base, 22, pad, 23, locking rod, 24, clamping strip, 25, locking strip, 26, pad one, 27, bottom mold, 271, mold strip one, 28, top mold, 281, mold strip two, 29, side frame, 210, clamping plate, 3, paper forming mold, 31, pad two, 32, paper frame, 33, injection hole, 4, corrugated paper, 5, outer paper. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-4 The present invention provides a technical solution: a method for preparing a stone-based carton and a forming device thereof, comprising an extruder 1 for heating, mixing and extruding raw materials, an extrusion tube installed at the output end of the extruder 1, and a corrugated forming mold 2 and a paper forming mold 3 connected to the end of the extrusion tube; the corrugated forming mold 2 and the paper forming mold 3 are equipped with locking mechanisms on the outside; the corrugated forming mold 2 comprises several layers of pads 26, the top of the pads 26 is equipped with a bottom mold 27, the bottom of the pads 26 is equipped with a top mold 28, and the outer sides of the top mold 28 and the bottom mold 27 are equipped with side frames 29; the paper forming mold 3 comprises several layers of pads 2 31, and the inner sides of two adjacent layers of pads 2 31 are clamped and equipped with paper frames 32; the top mold 28 is composed of several mold strips 281 arranged side by side, and the bottom shape of the mold strips 281 is the same as the trough shape of the corrugated paper; the bottom mold 27 is composed of several mold strips 271 arranged side by side, and the top shape of the mold strips 271 is the same as the peak shape of the corrugated paper.

[0021] In addition to the structure of separately assembling mold bar 1 271 and mold bar 281, the top mold 28 and the bottom mold 27 can also be made by directly cutting cold-pressed plates with the same crest and trough surfaces as the corrugated paper layer. The outer side of the corrugated cold-pressed plates is filled with high-temperature resistant resin material to ensure that the back side is flat.

[0022] In addition to the above two methods, the top mold 28 and the bottom mold 27 can also be formed by directly cutting a plate with a wave crest and trough pattern on the inner side and a flat plate structure on the outer side to form a corrugated paper mold.

[0023] The present invention provides a production process for directly injecting and molding single-layer paper and corrugated paper of fixed size and shape, and finally compounding to form a stone-based corrugated paper box. By starting from the mold, the size of the paper is directly fixed, and direct production is carried out, thereby reducing material waste and improving the difficulty of recycling. It effectively solves the problem that the existing stone paper material is first formed into paper, then compounded and finally cut, or compounded and then cut to produce packaging boxes of required size and shape, resulting in a lot of cutting waste, and the recycling of stone paper is not as convenient as that of conventional paper.

[0024] The locking mechanism comprises a pad 22 and a clamping strip 24, the outer sides of which are clamped with a locking strip 25, the outer sides of which are penetrated by a locking rod 23, and fixing nuts are screwed at both ends of the locking rod 23, which are clamped and fixed on the outer sides of the locking strip 25. When the locking mechanism is in use, the pad 22 and the outer sides of the clamping strip 24 at the corresponding positions are clamped and positioned by the locking strip 25, and after the locking strip 25 is adjusted to ensure uniform clamping force, the locking rod 23 is used to penetrate the locking strip 25, and nuts are screwed at the top and bottom of the locking strip 25 to fix the whole as an integral unit. Since the molds used in the application are all regularly repeated combination steps, the combination can use automated equipment to assemble the mold layer by layer, lift the equipment up and down, move left and right or forward and backward, drive the corresponding components to be placed in sequence according to the pad 1 26, pad 2 31, side frame 29, top mold 28, bottom mold 27, etc. required for each layer structure, and ensure that the edges and holes are aligned, so the assembly process is convenient; On the contrary, the demoulding process is the same as the assembly process, and can also be processed by repeated actions of lifting and lowering the mechanism to the left and right or moving forward and backward.

[0025] The most effective way to use the above mold combination and demoulding is to directly flip the topmost component and place it on the bottom layer during demoulding, then flip the second layer of demoulding components and place them on the second layer of the mold, and repeat this process to achieve demoulding and combined flipping operations, which can ensure the fastest demoulding and mold assembly efficiency.

[0026] During the demoulding and assembly process, in addition to the horizontal production method as shown in the figure, a vertical production method can also be used.

[0027] Specifically, the bottom of the cushion strip 22 is equipped with the base 21 , and the base 21 and the cushion strip 22 are assembled and fixed, and the cushion strip 22 can be assembled and disassembled between the base 21 through the fixing member.

[0028] Specifically, the inner dimensions of the side frame 29 and the paper frame 32 are the same.

[0029] Specifically, a threaded hole is formed on the back of the second mold bar 281 .

[0030] Specifically, a threaded hole is formed on the back of the mold bar 271 .

[0031] Specifically, the pad 1 26 is divided into two layers, and round holes are evenly opened on the inner side of the pad 1 26 , and countersunk screws are installed inside the round holes, and the countersunk screws are screwed on the back of the mold bar 1 271 or the mold bar 2 281 .

[0032] Specifically, an exhaust hole is opened on the outer wall of the side frame 29 and the paper frame 32, and an exhaust valve is arranged inside the exhaust hole. The exhaust valve is composed of a pin block with the same size as the inner side of the exhaust hole, an extension rod on the outer side of the pin block and a spring arranged on the outer side of the exhaust hole. The spring can withstand the reaction force of the exhaust pressure inside the mold cavity. When the raw material contacts the pin block, since the molecular density of the raw material is much greater than the molecular density of the gas, at the moment the raw material contacts the pin block, the force of the raw material on the pin block is greater than the force of the gas on the pin block, pushing the spring to compress, and then the pin block fits to the inner side of the exhaust hole, thereby closing the exhaust hole, realizing a function of medium-changing medium closing.

[0033] Specifically, a clamping plate 210 is disposed between the clamping strip 24 and the cushion strip 22 .

[0034] Specifically, an injection hole 33 is provided on the outside of pad 2 31 and pad 1 26, and a chamfer is provided on the outside of the injection hole. When the mold is assembled, the injection hole 33 of the mold is installed in a reciprocating manner in an ABBA manner. Therefore, when the raw material is injected from the injection hole, the raw material travels in an S shape, which helps to improve the exhaust effect.

[0035] The size and number of the injection holes 33 are determined according to the area of ​​the carton to be produced. After the injection molding process is completed, if the mold is removed, the two adjacent layers of paper will form a zigzag repetitive structure according to the connection position left by the injection holes 33. The number and size of the injection holes 33 should be minimized to the greatest extent. Therefore, it is most important to control the inner diameter of the injection holes 33 to avoid the connection points being too large, which is not conducive to separation. When the inner diameter of the injection holes 33 cannot be reduced, you can choose to increase the number of injection holes 33 set side by side in a straight line to reduce the size of the connection, which is more conducive to separation.

[0036] During demolding, one side of the demolding device can be provided with a reciprocating cutting structure as needed to separate the connection position between two adjacent layers of paper when lifting it. Taking the figure as an example, when the first layer of pad 26 is lifted, the top of the top layer of corrugated paper 4 has no adhesion, and then the second layer of pad 26 is lifted upward, and the top mold 28 installed at the bottom of the second layer of pad 26 is lifted, and the first layer of corrugated paper 4 will be connected to the top of the next layer of corrugated paper 4 through the cylindrical injection body formed by the injection hole 33 below. In this process, the upper layer of corrugated paper 4 and the second layer of pad 26 are at the top and will lift the lower layer of corrugated paper 4. At this time, after the cutting tool enters from the outside to cut the connection position, the upper layer of corrugated paper 4 and the second layer of pad 26 are separated from the third layer of pad 26 and the bottom mold 27, and separated from the second layer of corrugated paper 4, and so on, and finally the demolding is completed.

[0037] Taking the above structure as an example, after the first layer of pad 26 is removed, it is directly flipped 180 degrees and placed directly on top of another set of model frames as the bottom layer. Then the removed second layer of pad 26 is flipped and placed on top of the bottom layer of the model frame, and then gradually re-docking is carried out to realize circular production, which is easy to operate and quick to use.

[0038] In the installation method of using the mold bar 1 271 or the mold bar 281 to form the bottom mold 27 or the top mold 28, the mold bar 1 271 or the mold bar 281 of a certain length can be cut according to a fixed size and then directly combined to form a corresponding mold plate, which has low processing difficulty and flexible and convenient assembly method, which is conducive to simplifying the mold opening process and reducing the mold opening cost; After the top mold 28 and the bottom mold 27 produced in this way are assembled and fixed, a coating needs to be applied inside to fill the gap between the adjacent mold strips 1 271 or 281 to improve the demoulding effect. The coating can be: fluoropolymer coating (such as polytetrafluoroethylene, PTFE), silicone coating (such as high temperature resistant silicone), ceramic coating, boron nitride coating or high temperature resistant demoulding agent. It ensures high temperature resistance, anti-adhesion and good durability.

[0039] A method for preparing a stone-based carton, comprising the following methods: Step A: preparing a mold, determining the size of the stone-based carton, and then cutting a mold strip 271 and a mold strip 281 according to the size of the paper side frame 29 and the paper frame 32, and assembling a plurality of mold strips 271 and a mold strip 281 into one piece according to the size of the stone-based carton, and applying an anti-adhesion coating between the gaps between the mold strips 1 271 and the mold strips 281 for use; Step B: preparing a formula, Formula ①: preparing 60%-70% calcium carbonate, 25%-30% high-density polyethylene, 2%-5% smooth coating additives, 0.5%-1% ultraviolet absorbers and 1% coupling agents as the outer packaging layer formula of the stone paper; Formula ②: preparing 75%-85% calcium carbonate, 10%-15% polypropylene, 1%-2% foaming agent, and 2%-3% reinforcing fiber as the corrugated layer formula of the stone-based carton; Formula ③: prepare 60%-70% calcium carbonate, 20%-25% low-density polyethylene, 3%-5% oil-resistant coating additives and 1%-2% antibacterial agent as the inner packaging layer formula of the stone-based carton; Step C: Production preparation. Before production, all molds are stacked and clamped in the locking mechanism according to the outer packaging, corrugated paper layer and inner packaging of the stone-based carton, and several sets are combined for use in turn. They are connected and fixed to the output pipe of the injection molding machine before use; Step D: Molding production. According to the production process, a single set of molds is used as a unit. The same cavity is combined inside the three single sets of molds for producing the outer packaging, corrugated paper layer and inner packaging. Then each injection molding unit is connected to a separate extruder (1). The separate extruder (1) mixes and heats the corresponding formulas respectively, and finally directly molds the outer packaging, corrugated paper layer and inner packaging of the same size as the desired carton inside the corresponding mold unit; Step E: Composite molding, heating and compounding the outer packaging, the corrugated paper layer and the two inner joints of the inner packaging after removing the excess pouring nozzles to finally form a stone-based carton of the desired size and shape.

[0040] The outer packaging layer produced with formula ① as raw material has excellent printing adaptability, water resistance and wear resistance, and is suitable for printing packaging, such as color box outer packaging. Its surface is smooth and flat, can be used on different printing machines, and has good durability.

[0041] In the corrugated paper layer produced with formula ① as raw material, this formula mainly focuses on economy, high calcium carbonate content, and uses polypropylene to maintain the flexibility and strength of the paper. Adding a foaming agent can reduce the weight of the middle layer, which is suitable for mass production and used in the structural part of the middle layer of corrugated paper, with good toughness and cost-effectiveness.

[0042] In the inner packaging layer produced with formula ① as the raw material, this formula focuses on water and oil resistance, and is particularly suitable for food packaging or other scenarios that need to prevent grease penetration. LDPE ensures good water resistance and flexibility, while the addition of an oil-resistant coating enables this layer to prevent grease or water penetration. Antimicrobial agents improve its hygienic safety in the packaging field.

[0043] In the above three formulations, Smooth coating additives that can be used include silicone compounds, calcium stearate, etc.

[0044] As the ultraviolet absorber, UV-326 (benzotriazole), diphenyl ketone, etc. can be used.

[0045] The coupling agent that can be used is: silane coupling agent (such as KH-550), titanate coupling agent, etc.

[0046] The foaming agent that can be used is: AC foaming agent (azodicarbonamide), inorganic foaming agent (such as sodium bicarbonate), etc.

[0047] Reinforcement fibers that can be used include glass fiber, aramid fiber, etc.

[0048] Oil-resistant coating additives that can be used include: fluoride coating additives (such as polytetrafluoroethylene, PTFE), fluorocarbon resins, etc.

[0049] Antibacterial agents that can be used include: nano-silver antibacterial agents, zinc ion antibacterial agents, etc.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stone-based carton forming device, comprising an extruder (1) for heating, mixing and extruding raw materials, characterized in that: The output end of the extruder (1) is provided with an extrusion tube, the end of which is connected to a corrugated forming mold (2) and a paper forming mold (3); the corrugated forming mold (2) and the paper forming mold (3) are externally provided with locking mechanisms; the corrugated forming mold (2) comprises a plurality of layers of pad plates (26), the top of the pad plates (26) is provided with a bottom mold (27), the bottom of the pad plates (26) is provided with a top mold (28), and the outer sides of the top mold (28) and the bottom mold (27) are provided with side frames (29); the paper forming mold (3) comprises a plurality of layers of pad plates (31), the inner sides of two adjacent layers of pad plates (31) are clamped with paper frames (32); the top mold (28) is composed of a plurality of mold strips (281) arranged side by side, and the bottom shape of the mold strips (281) is the same as the trough shape of the corrugated paper; The bottom mold (27) is composed of a plurality of mold strips (271) arranged side by side, and the top shape of the mold strips (271) is the same as the wave crest shape of the corrugated paper.

2. The stone-based carton forming equipment according to claim 1, characterized in that: The locking mechanism comprises a gasket strip (22) and a clamp strip (24), the outer sides of the gasket strip (22) and the clamp strip (24) being clamped with a locking strip (25), the outer side of the locking strip (25) being penetrated by a locking rod (23), and both ends of the locking rod (23) being screwed with fixing nuts, the fixing nuts being clamped and fixed on the outer side of the locking strip (25).

3. The stone-based carton forming equipment according to claim 2, characterized in that: The bottom of the cushion strip (22) is equipped with a base (21), and the base (21) and the cushion strip (22) are assembled and fixed, and the cushion strip (22) can realize the function of assembly and disassembly between the base (21) through the fixing piece.

4. The stone-based carton forming equipment according to claim 3, characterized in that: The inner dimensions of the side frame (29) and the paper frame (32) are the same.

5. The stone-based carton forming equipment according to claim 1, characterized in that: The back of the second mold bar (281) is provided with a threaded hole, and the back of the first mold bar (271) is provided with a threaded hole.

6. The stone-based carton forming equipment according to claim 1, characterized in that: The backing plate 1 (26) is divided into two layers, and round holes are evenly opened on the inner side of the backing plate 1 (26), and countersunk screws are installed inside the round holes. The countersunk screws are screwed on the back of the mold strip 1 (271) or the mold strip 2 (281).

7. The stone-based carton forming equipment according to claim 4, characterized in that: The outer side walls of the side frame (29) and the paper frame (32) are provided with exhaust holes.

8. The stone-based carton forming equipment according to claim 1, characterized in that: A clamping plate (210) is provided between the clamping strip (24) and the cushion strip (22).

9. The stone-based carton forming equipment according to claim 1, characterized in that: The second pad (31) and the first pad (26) are provided with injection holes (33) on their exteriors, and the exteriors of the injection holes are provided with chamfers.

10. A method for preparing a stone-based carton according to the stone-based carton forming equipment according to any one of claims 1 to 9, comprising the following methods: Step A: prepare a mold, determine the size of the stone-based carton, and then cut the mold strip 1 271 and the mold strip 2 281 according to the size of the paper side frame 29 and the paper frame 32, and then assemble several mold strips 1 271 and mold strips 2 281 into one according to the size of the stone-based carton, and apply an anti-adhesion coating between the gaps of the mold strips 1 271 and the mold strips 2 281 for use; Step B: prepare a formula, Formula ①: prepare 60%-70% calcium carbonate, 25%-30% high-density polyethylene, 2%-5% smooth coating additives, 0.5%-1% ultraviolet absorbers and 1% coupling agents as the outer packaging layer formula of the stone paper; Formula ②: Prepare 75%-85% calcium carbonate, 10%-15% polypropylene, 1%-2% foaming agent, and 2%-3% reinforcing fiber as the formula for the corrugated layer of the stone-based carton; Formula ③: Prepare 60%-70% calcium carbonate, 20%-25% low-density polyethylene, 3%-5% oil-resistant coating additives and 1%-2% antibacterial agent as the formula for the inner packaging layer of the stone-based carton; Step C: Production preparation. Before production, all molds are fixed inside the locking mechanism according to the outer packaging, corrugated paper layer and inner packaging of the stone-based carton, and several sets are combined and used in turn. They are connected and fixed with the output pipe of the injection molding machine before use; Step D: molding production, according to the production process, a single set of molds is used as a unit, and the same cavity is combined inside the three single sets of molds for producing outer packaging, corrugated paper layer and inner packaging. Then each injection molding unit is connected to a separate extruder (1), and the separate extruder (1) mixes and heats the corresponding formula respectively, and finally directly molds the outer packaging, corrugated paper layer and inner packaging with the same size as the desired carton inside the corresponding mold unit; Step E: composite molding, the two inner connection points of the outer packaging, corrugated paper layer and inner packaging after removing the excess casting nozzle are heated and composited to finally form a stone-based carton with the desired size and shape.

Images