Cold insulation material injection mold

Abstract

This invention discloses a cold insulation material injection mold, comprising: a mold body including a first mold parting structure and a second mold parting structure; at least one injection port and at least one vent port are respectively provided on at least one side of the first mold parting structure and the second mold parting structure; a first stop portion and a second stop portion are respectively provided around the two ends of the first mold parting structure and the second mold parting structure. After the first mold parting structure and the second mold parting structure are joined together, an inner mold cavity corresponding to the shape of a tube is formed inside; each of the first stop portions and each of the second stop portions abuts against the tube body to position the tube body and limit the thickness of the cold insulation material slurry.

Description

Cold insulation material injection mold Technical Field

[0001] This invention relates to a mold for injecting cold insulation materials, and particularly to mold forming technology, pipe cold insulation construction technology and 3D printing technology, especially a non-metallic mold for cold insulation construction of the outer layer of pipes. Prior Technology

[0002] Traditional methods of cold insulation mainly include the following three:

[0003] 1. Spraying of cold-insulating coating: This method is applied at room temperature, but because multiple layers need to be stacked to achieve the required cold-insulating thickness, the application speed is slow, the construction period is long, and the construction efficiency is low.

[0004] 2. Application of insulation materials: Rock wool, air-insulated blankets and other insulation materials are applied to the surface of the pipe. However, this method is prone to gaps and poor sealing, resulting in poor insulation effect and difficulty in controlling construction quality.

[0005] III. Injection Molding (High-Density Polyurethane): While injection molding using polyurethane cold-insulating foam material yields better molding results, it has the following drawbacks:

[0006] Expensive price, high material cost;

[0007] It does not keep things cold and is easily broken down.

[0008] It has no flame retardant properties and produces toxic gases when burned, failing to meet environmental protection and safety requirements;

[0009] Prolonged use makes it prone to absorbing water, leading to a decrease in its cold-keeping performance;

[0010] Because the polyurethane foaming process generates expansion pressure, the mold needs to have a certain strength. Metal molds are usually required, which results in high mold costs and makes the molds difficult to reuse.

[0011] In view of this, how to eliminate the above-mentioned deficiencies is the technical difficulty that the inventor of this invention seeks to solve. Therefore, based on years of experience in related industries, the inventor of this invention has devoted himself to research and improvement for many years and finally successfully developed this invention, which has led to the birth of this invention to improve its effectiveness. Summary of the Invention

[0012] In view of the above-mentioned shortcomings, the main objective of this invention is to provide a cold insulation material injection mold to overcome the shortcomings of traditional polyurethane cold insulation foam materials and other cold insulation construction methods, thereby achieving the goals of reducing costs, improving environmental friendliness, improving material performance, and increasing construction efficiency.

[0013] Another objective of this invention is to provide a reusable non-metallic mold that can be manufactured using 3D printing, thereby significantly reducing mold manufacturing costs.

[0014] Another objective of this invention is to provide a method for injecting a water-based reactive cold-insulating material slurry, which, after curing, exhibits excellent flame retardancy, water resistance, and cold-insulating properties.

[0015] A first embodiment of the novel cold-insulating material injection mold includes: a non-metallic mold body, comprising a first mold-parting structure and a second mold-parting structure. At least one side of the first mold-parting structure is provided with at least one injection port and at least one vent port. A first stop portion and a second stop portion are respectively provided around the two ends of the first mold-parting structure and the second mold-parting structure. The first mold-parting structure and the second mold-parting structure are joined together to form an inner mold cavity. The inner mold cavity provides a shape corresponding to a tube body, allowing each of the first... A stop and each of the second stopes abut against the pipe body; the injection port provides a water-based reactive cold insulation slurry for injection into the inner mold cavity; the vent is used to expel air from each of the inner mold cavities; the water-based reactive cold insulation slurry is blocked by each of the first stopes and each of the second stopes; after the water-based reactive cold insulation slurry has cured, the first parting structure and the second parting structure are removed; the cured water-based reactive cold insulation slurry forms a cold insulation layer of predetermined thickness, flame retardant, water-proof and cold-insulating on the pipe body.

[0016] A second embodiment of this novel cold-insulating material injection mold includes: a mold body with compressive strength lower than that of a metal mold, which is manufactured by 3D printing using a computer program that automatically generates a three-dimensional pattern based on the specifications of a tube, and is reusable; the mold body includes a first mold-parting structure and a second mold-parting structure, the first mold-parting structure having at least one injection port and at least one vent port on at least one side, and a first stop and a second stop respectively circumferentially arranged at both ends of the first mold-parting structure and the second mold-parting structure, the first mold-parting structure and the second mold-parting structure being coupled together to... An internal mold cavity is formed inside, which is provided with a shape corresponding to the tube body, so that each of the first stop parts and each of the second stop parts abut against the tube body respectively; the injection port provides water-based reactive cold insulation slurry to be injected into the internal mold cavity, and the vent is used to expel the air in each of the internal mold cavities. The water-based reactive cold insulation slurry is blocked by each of the first stop parts and each of the second stop parts. After the water-based reactive cold insulation slurry is cured, the first parting structure and the second parting structure are removed. The cured water-based reactive cold insulation slurry has a predetermined thickness on the tube body and has the functions of flame retardancy, water resistance, and cold insulation.

[0017] In the first embodiment and the second embodiment, the lengths of the first mold-parting structure and the second mold-parting structure are equal, and on the side of the first mold-parting structure and the second mold-parting structure that are connected to each other, a plurality of first connecting parts and a plurality of second connecting parts are respectively provided outwardly. The first mold-parting structure and the second mold-parting structure are connected to each other, and each of the first connecting parts and each of the second connecting parts abuts against each other and is fixed by a plurality of locking elements.

[0018] The second mold structure is further provided with an extension tube mold. A third stop is provided inside the end of the extension tube mold, so that the mold body is covered on the outside of a tee pipe and the extension tube mold is covered on one branch of the tee pipe.

[0019] The first and second mold-separating structures are further provided with a first wide diameter portion and a second wide diameter portion, thereby allowing the mold body to be covered on the outside of a flange tube, and the first wide diameter portion and the second wide diameter portion to cover the flange of the flange tube.

[0020] The first and second mold-separating structures are further provided with a first curved portion and a second curved portion, thereby covering the outside of a bent tube, and the bending radii of the first and second curved portions match the bending radius of the bent tube.

[0021] The difference between the first embodiment and the second embodiment is that the manufacturing method and strength of the mold body are clearly stated to be lower than those of traditional metal molds.

[0022] A first embodiment of the present invention discloses a method for injecting cold insulation material, comprising the following steps: (a) providing a mold body, the mold body including a first mold parting structure and a second mold parting structure, the first mold parting structure having at least one injection port and at least one vent port on at least one side, and the first mold parting structure and the second mold parting structure having a first stop portion and a second stop portion respectively circumferentially arranged at both ends; (b) assembling the first mold parting structure and the second mold parting structure on the outer side of a tube body, such that each of the first stop portions and each of the second stop portions abuts against the outer side of the tube body. (c) An internal mold cavity is formed on the pipe body, and the interior of the first mold structure and the second mold structure are connected; (d) A water-based reactive cold insulation slurry is injected through the injection port, so that the water-based reactive cold insulation slurry fills the internal mold cavity and air is discharged through the vent, and the water-based reactive cold insulation slurry stops flowing due to the obstruction of each of the first stop and each of the second stop; and (e) After the water-based reactive cold insulation slurry solidifies to form a cold insulation layer with a predetermined thickness, the first mold structure and the second mold structure are removed, and the pipe body is taken out.

[0023] A second embodiment of the novel cold insulation material injection method includes the following steps: (a) measuring the specifications of a tube, including outer diameter, length, bending radius, bending angle, or joint type; (b) inputting the specifications into a computer program to automatically generate a corresponding three-dimensional mold pattern, and fabricating a mold body using 3D printing; (c) placing the tube into the inner mold cavity of the mold body, so that the tube abuts against each of the first stop portions and each of the second stop portions, and connecting the first parting structure and the second parting structure; (d) injecting a water-based reactive cold insulation material slurry through the injection port, so that the water-based reactive cold insulation material slurry fills the inner mold cavity and exhausts air through the vent; (e) after the water-based reactive cold insulation material slurry has cured, removing the first parting structure and the second parting structure, and taking out the tube with the formed cold insulation layer; and (f) the mold body can be reused after cleaning.

[0024] The water-based reactive cold insulation slurry includes a reactive water-based acrylic resin emulsion, flame-retardant filler, aerogel filler, and dispersion. The water-based reactive cold insulation slurry is an environmentally friendly and non-toxic slurry, and the cold insulation layer has flame retardancy, water resistance, and cold insulation properties.

[0025] In summary, this novel insulation material injection mold overcomes the shortcomings of traditional polyurethane insulation foam materials, such as high cost, lack of insulation, lack of flame retardancy, easy water absorption, and high mold costs. It also improves upon the slow application of insulation coatings and poor adhesion of the insulation material. This novel design, through low-cost 3D printing of molds, water-based reactive insulation slurry, and an automated modeling system, achieves cost reduction, improved environmental friendliness, enhanced material performance, and increased construction efficiency, demonstrating industrial applicability and progressiveness. Simple Explanation of the Diagram

[0026] The first figure is an exploded view of the mold body of this new type. The second figure is an assembly diagram of the mold body of this new type. The third figure is a schematic diagram of the new invention installed on the outside of the tube body. The fourth figure is a cross-sectional view that continues from the third figure. Figure 5 is a schematic diagram of the mold body of this new type installed on a T-shaped pipe. Figure 6 is a schematic diagram of the mold body of this new type installed on the flange pipe. Figure 7 is a schematic diagram of the mold body of this new type installed on the bent pipe. Implementation

[0027] To facilitate the explanation of the content and effects of this invention, specific embodiments are listed below with reference to the figures. Please refer to Figures 1 to 4. The first embodiment of the cold insulation material injection mold of this invention includes:

[0028] A non-metallic mold body 10 includes a first mold parting structure 11 and a second mold parting structure 12. At least one side of the first mold parting structure 11 is provided with at least one injection port 111 and at least one vent port 112. A first stop portion 113 and a second stop portion 121 are respectively provided around the two ends of the first mold parting structure 11 and the second mold parting structure 12.

[0029] The first mold-forming structure 11 and the second mold-forming structure are combined to form an inner mold cavity. The inner mold cavity is provided with a shape corresponding to a tube body 20, so that each of the first stop portions 113 and each of the second stop portions 121 abut against the tube body 20. The injection port 111 provides a water-based reactive cold insulation slurry to be injected into the inner mold cavity. The vent port 112 is used to expel the air in each of the inner mold cavities. The water-based reactive cold insulation slurry is blocked by each of the first stop portions 113 and each of the second stop portions 121. After the water-based reactive cold insulation slurry is cured, the first mold-forming structure 11 and the second mold-forming structure 12 are removed. The cured water-based reactive cold insulation slurry forms a cold insulation layer of predetermined thickness, flame retardant, water-proof and cold-insulating on the tube body 20.

[0030] The first mold-separating structure 11 and the second mold-separating structure 12 have the same length. On the side where the first mold-separating structure 11 and the second mold-separating structure 12 are joined, a plurality of first joining portions 114 and a plurality of second joining portions 122 are respectively provided outward. The first mold-separating structure 11 and the second mold-separating structure 12 are joined, and each of the first joining portions 114 and each of the second joining portions 122 abuts against each other and is fixed by a plurality of locking elements.

[0031] Please refer to Figure 5. The tube body 20 can be a tee pipe. The second mold structure 12 is further provided with an extension pipe mold 123. A third stop 1231 is provided inside the end of the extension pipe mold 123, so that the mold body 10 covers the outside of a tee pipe. The extension pipe mold 123 covers one branch pipe 21 of the tee pipe.

[0032] Please refer to Figure 6. The pipe body 20 can be a flange pipe. The first mold parting structure 11 and the second mold parting structure 12 are further provided with a first wide diameter portion 115 and a second wide diameter portion 124, so that the mold body 10 covers the outside of a flange pipe, and the first wide diameter portion 115 and the second wide diameter portion 124 cover the flange of the flange pipe.

[0033] Please refer to Figure 7. The tube body 20 can be a bent tube. The first mold parting structure 11 and the second mold parting structure 12 are further provided with a first bending portion and a second bending portion, so that the mold body 10 covers the outside of the bent tube, and the bending radius of the first bending portion and the second bending portion matches the bending radius of the bent tube.

[0034] The second embodiment of this novel cold-insulating material injection mold has the same structure as the first embodiment, so the similarities will not be repeated here.

[0035] In the second embodiment, the mold body 10 is characterized as a mold body with "compressive strength lower than that of a metal mold". It is made by automatically generating a three-dimensional pattern by a computer program according to the specifications of a tube, and is made by 3D printing. It can be reused.

[0036] This new type of material is applicable to commonly used pipe shapes and overcomes the shortcomings of previous technologies such as polyurethane insulation foam. The injection material is a water-based reactive slurry (including reactive water-based acrylic resin emulsion, flame-retardant filler, aerogel filler, dispersion, etc.). After molding, it has good flame retardancy, good water resistance, and is environmentally friendly and non-toxic. Because the injection molding process does not require the mold to have a certain strength as polyurethane insulation foam molding, the mold is selected using a 3D printing mold with lower raw material costs. A program is designed, and relevant parameters such as pipe size, diameter, and length are input. It can automatically generate a 3D model (as shown in the attached figure) and print out the mold. It is inexpensive and reusable.

[0037] The first embodiment of this novel cold insulation material injection method includes the following steps:

[0038] (a) A mold body 10 is provided, the mold body 10 including a first mold parting structure 11 and a second mold parting structure 12, at least one injection port 111 and at least one vent port 112 are respectively provided on at least one side of the first mold parting structure 11 and the second mold parting structure 12, and a first stop portion 113 and a second stop portion 121 are respectively provided around the two ends of the first mold parting structure 11 and the second mold parting structure 12;

[0039] (b) The first mold-separating structure 11 and the second mold-separating structure 12 are assembled on the outside of a tube body 20, such that each of the first stop portions 113 and each of the second stop portions 121 abuts against the tube body 20, and the interiors of the first mold-separating structure 11 and the second mold-separating structure 12 form a communicating inner mold cavity;

[0040] (c) A water-based reactive insulation slurry is injected through the injection port 111, filling the inner mold cavity and expelling air through the vent port 112. The water-based reactive insulation slurry stops flowing due to the obstruction of each of the first stop portions 113 and each of the second stop portions 121; and

[0041] (d) After the water-based reactive cold insulation slurry has cured to form a cold insulation layer with a predetermined thickness, remove the first mold structure 11 and the second mold structure 12 and take out the tube.

[0042] The second embodiment of this novel cold insulation material injection method has some steps that are the same as those in the first embodiment, so the similarities will not be repeated here, but will be described in detail first.

[0043] In the second embodiment of the method, it is further explained that the mold body 10 is made in such a way that it can be reused after injection.

[0044] (a) Measure the specifications of a tube body 20, including outer diameter, length, bending radius, bending angle or joint type; (b) Input the specifications into a computer program to automatically generate a corresponding three-dimensional mold drawing, and make a mold body 10 by 3D printing; ... (f) The mold body can be reused after cleaning.

[0045] The water-based reactive cold insulation slurry includes a reactive water-based acrylic resin emulsion, flame-retardant filler, aerogel filler, and dispersion. The water-based reactive cold insulation slurry is an environmentally friendly and non-toxic slurry, and the cold insulation layer has flame retardancy, water resistance, and cold insulation properties.

[0046] In detail, the composition of this water-based reactive cold insulation slurry includes: 40-70% water-based resin, 15-30% functional fillers (flame retardant fillers, hollow fillers); 1-5% functional additives (defoamers, dispersants, etc.); and 1-7% hardener. Among them, the water-based resins are water-based acrylic resins, water-based polyurethane resins, water-based epoxy resins, water-based alkyd resins, etc.; and the functional fillers are metal oxides, metal hydroxides, insulating glass, aerogels, hollow ceramic balls, etc.

[0047] Compared with the prior art, the present invention has the following effects and advantages:

[0048] I. Mold costs have been significantly reduced.

[0049] This new type of mold uses a non-metallic material and can be manufactured through 3D printing. Compared to traditional polyurethane foam insulation construction, which requires high-strength metal molds (which are costly), this new 3D-printed mold has lower material costs and is more flexible and faster to manufacture. Furthermore, the mold body can be reused multiple times, further reducing overall construction costs.

[0050] II. Automated modeling, adaptable to various pipe fitting shapes

[0051] This new type of pipe fitting can automatically generate a 3D model and print the mold by inputting relevant parameters such as the size, diameter, length, bending radius, bending angle, or joint specifications of the pipe fitting through a computer program. This design allows the new type of pipe fitting to adapt to various pipe shapes such as straight pipes, bends, reducers, tees, crosses, and flanges, making it widely applicable.

[0052] III. Excellent performance of cold insulation materials

[0053] This novel material uses a water-based reactive cold insulation slurry, which contains reactive water-based acrylic resin emulsion, flame-retardant filler, aerogel filler, and dispersion, and has the following advantages compared to traditional polyurethane foam materials:

[0054] Excellent flame retardancy: The cured cold insulation layer has excellent flame retardant properties, improving safety;

[0055] Excellent water resistance: It does not easily absorb water even after long-term use, and its cold retention performance is stable and durable;

[0056] Excellent cold insulation performance: not easily decomposed;

[0057] Environmentally friendly and non-toxic: It contains no harmful substances, does not produce toxic gases when burned, and meets environmental protection requirements.

[0058] IV. Improved Construction Efficiency

[0059] This new type of material uses a casting molding method, which makes the construction process simple and quick, significantly shortening the construction period compared to the slow stacking method of spraying insulation coatings. At the same time, compared to the plastering method of insulation material, this new type of material can ensure the tightness of the insulation layer, without gaps, and has a better insulation effect.

[0060] Fifth, the molds are reusable, which aligns with sustainable development.

[0061] The mold body of this new type is made of 3D printed plastic material. Since the water-based reactive cold insulation slurry does not need to withstand high pressure during the curing process, the mold body can be reused after cleaning, reducing material waste and conforming to the concepts of environmental protection and sustainable development.

[0062] VI. Precisely control the thickness of the insulation layer

[0063] This new design, through the design of the first and second stop sections, obstructs the flow of water-based reactive insulation slurry during the pouring process, precisely controlling the thickness of the insulation layer and ensuring consistent and stable construction quality.

[0064] The above detailed description is a specific description of one feasible embodiment of the present invention. However, the embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the spirit of the present invention should be included in the patent scope of this case.

[0065] 10: Mold body 11: First modular structure 111: Injection port 112: Exhaust port 113: First stop section 114: First joint 115: First width section 12: Second modular structure 121: Second stop section 122: Second joint 123: Extension tube mold 1231: Third stop component 124: Second wide diameter section 20:tube body 21: Branch pipe

Claims

1. A cold insulation material injection mold, comprising: a non-metallic mold body, including a first mold parting structure and a second mold parting structure, wherein at least one side of the first mold parting structure is provided with at least one injection port and at least one vent port, and a first stop portion and a second stop portion are respectively provided around both ends of the first mold parting structure and the second mold parting structure, the first mold parting structure and the second mold parting structure being joined together to form an inner mold cavity, the inner mold cavity being provided with a shape corresponding to a tube body, such that each of the first stop portions and each of the second stop portions... The baffles abut against the pipe body respectively; the injection port provides a water-based reactive cold insulation slurry to be injected into the inner mold cavity, and the vent is used to expel the air in each of the inner mold cavities. The water-based reactive cold insulation slurry is blocked by each of the first baffles and each of the second baffles. After the water-based reactive cold insulation slurry is cured, the first mold parting structure and the second mold parting structure are removed. The cured water-based reactive cold insulation slurry forms a cold insulation layer of predetermined thickness, flame retardant, water-proof and cold-insulating on the pipe body.

2. A cold insulation material injection mold, comprising: a mold body with compressive strength lower than that of a metal mold, wherein the mold body is manufactured by 3D printing using a computer program that automatically generates a three-dimensional pattern based on the specifications of a tube, and is reusable; the mold body includes a first parting structure and a second parting structure, wherein at least one side of the first parting structure is provided with at least one injection port and at least one vent port, and a first stop portion and a second stop portion are respectively provided around both ends of the first parting structure and the second parting structure; the first parting structure and the second parting structure are coupled to form an inner mold cavity, the inner mold cavity providing... Corresponding to the shape of the tube, each of the first stop portions and each of the second stop portions abut against the tube body respectively; the injection port provides a water-based reactive cold insulation slurry for injection into the inner mold cavity, and the vent is used to expel air from each of the inner mold cavities. The water-based reactive cold insulation slurry is blocked by each of the first stop portions and each of the second stop portions. After the water-based reactive cold insulation slurry has solidified, the first parting structure and the second parting structure are removed. The solidified water-based reactive cold insulation slurry has a predetermined thickness on the tube body and has the functions of flame retardancy, water resistance, and cold insulation.

3. The cold insulation material injection mold as described in claim 1 or 2, wherein the first mold parting structure and the second mold parting structure have equal lengths, and on the side where the first mold parting structure and the second mold parting structure are joined, a plurality of first joint portions and a plurality of second joint portions are respectively provided outwardly, the first mold parting structure and the second mold parting structure are joined, and each of the first joint portions and each of the second joint portions abuts against each other, and each of the first joint portions and each of the second joint portions is fixed by a plurality of locking elements.

4. The cold insulation material injection mold as described in claim 1 or 2, wherein the second parting structure is further provided with an extension tube mold, and a third stop is provided inside the end of the extension tube mold, thereby covering the mold body on the outside of a tee pipe, and the extension tube mold covering one branch of the tee pipe.

5. The cold insulation material injection mold as described in claim 1 or 2, wherein the first mold parting structure and the second mold parting structure are further provided with a first wide diameter portion and a second wide diameter portion, thereby allowing the mold body to be covered on the outside of a flange tube, and the first wide diameter portion and the second wide diameter portion to cover the flange of the flange tube.

6. The cold insulation material injection mold as described in claim 1 or 2, wherein the first mold parting structure and the second mold parting structure are further provided with a first curved portion and a second curved portion, thereby covering the outside of a bent tube, and the bending radius of the first curved portion and the second curved portion matches the bending radius of the bent tube.

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