Manufacturing method of crystal liner and crystal liner

Abstract

The invention belongs to the technical field of crystal liners, and particularly relates to a manufacturing method of a crystal liner and the crystal liner. The manufacturing method of the crystal liner comprises the following steps: performing injection molding on the lower liner and the upper liner; casting a flange; the flange and the upper container are both clamped on two opposite stations of an injection molding machine, the two stations are spaced, and the flange is arranged on the upper container in an injection molding mode so that an end socket can be formed between the flange and the end socket end of the upper container; welding the upper liner welding end and the lower liner welding end to connect the upper liner and the lower liner to form an injection molding crystal liner; and a peripheral fiber layer is arranged on the outer wall of the injection molding crystal liner. The connection between the flange and the sealing head is more stable, the sealing performance is good, and the phenomenon of water leakage of the inner container at the bolt penetrating part is avoided; the wall thicknesses of the upper container and the lower container are more uniform, and the bottom and the side wall of the inner container are not prone to water seepage.

Description

Technical Field

[0001] The present application belongs to the technical field of crystal gallbladders, and specifically relates to a method for manufacturing a crystal gallbladder and a crystal gallbladder. Background Art

[0002] The main structure of the storage type electric water heater includes: inner tank, heating tube, thermostat, water level controller, safety valve, etc. Among them, the inner tank is the core component of the storage type electric water heater, which is a closed container for storing hot water.

[0003] The end cap of the inner tank is equipped with a flange, which is used to connect the inner tank and the water storage type electric water heater shell for installation and maintenance. However, in the current technical level, the inner tank has at least the following two technical problems.

[0004] At present, plastic liners have appeared. Most of these plastic liners are produced by blow molding. However, the wall thickness of the plastic liners produced by blow molding is uneven. During daily use, the bottom and side walls of the plastic liners are prone to water seepage, posing a safety risk. Summary of the invention

[0005] In order to solve the above-mentioned problems in the prior art, the present application provides a manufacturing method and a crystal tank, wherein a head is injection molded by an injection molding process and the flange and the head are injection molded as one body at the same time, a lower tank and an upper tank are injection molded by an injection molding process, and the upper tank and the lower tank are welded to form an inner tank, and then an outer fiber layer is wrapped around the outer wall of the inner tank to reinforce the strength and water sealing of the inner tank, thereby improving or avoiding the problem of easy water seepage at the bottom and side walls of the inner tank, and ensuring the safe use of the electric water heater.

[0006] In a first aspect, an embodiment of the present application provides a method for manufacturing a crystal gallbladder, comprising the following steps: injection molding a lower gallbladder and an upper gallbladder; wherein, one end of the lower gallbladder is opened to form a lower gallbladder welding end, and both ends of the upper gallbladder are opened to form an upper gallbladder welding end and an upper gallbladder head end; casting a flange; clamping the flange and the upper gallbladder on two opposite workstations with a spacing on an injection molding machine, and injection molding the flange on the upper gallbladder to form a head between the flange and the upper gallbladder head end; wherein the head wraps at least a portion of the flange; welding the upper gallbladder welding end and the lower gallbladder welding end to connect the upper gallbladder and the lower gallbladder to form an injection-molded crystal gallbladder; and providing an outer fiber layer on the outer wall of the injection-molded crystal gallbladder.

[0007] In the optional technical scheme of the manufacturing method of the above-mentioned crystal gallbladder, the injection molding of the lower gallbladder, the upper gallbladder or the injection molding of the flange on the head end of the upper gallbladder includes: using a center-injection molding method to inject the lower gallbladder, the upper gallbladder or the injection molding of the flange on the head end of the upper gallbladder, wherein the injection gate is located at the center of the injection mold, the injection gate is sheet-shaped, and the gate is cut off after the injection molding is completed.

[0008] In the optional technical solution of the manufacturing method of the above-mentioned crystal gall, the cast flange comprises: a cast annular shell; wherein the shell has an inner cavity and an opening connected to the inner cavity, the inner cavity has a plurality of reinforcing rib groups, each of the reinforcing rib groups is evenly spaced around the circumference of the shell, each reinforcing rib group has at least two reinforcing ribs arranged at intervals, and the shell is located in the accommodating cavity of the head.

[0009] In an optional technical solution of the above-mentioned method for manufacturing the crystal gallbladder, the casting of the annular shell includes: casting an annular shell having an inner extending edge; wherein the inner extending edge is a first flange extending toward the inner ring of the shell, and the inner extending edge is located in the accommodating cavity.

[0010] In the optional technical scheme of the manufacturing method of the above-mentioned crystal gall, the casting of the annular shell with an inner extension edge includes: casting an annular shell with an inner extension edge, a reinforcement edge and an outer extension edge; wherein the reinforcement edge is hooked and connected with the inner extension edge, and the reinforcement edge extends to the outside of the shell through the opening, and the end of each of the reinforcing ribs facing the opening is abutted against the reinforcement edge, and there is a gap between the reinforcement edge and the inner ring of the shell, and the head is filled in the gap; wherein the outer extension edge is a second flange extending toward the outer ring of the shell, and the outer extension edge is located outside the accommodating cavity.

[0011] In an optional technical solution of the above-mentioned method for manufacturing the crystal gallbladder, the casting of the annular shell comprises: casting an annular shell having a plurality of side positioning holes; wherein the side positioning holes are located on the outer ring of the shell and are evenly spaced around the circumference of the shell, each of the side positioning holes is connected to the inner cavity, and the side positioning holes are used to position the flange when the flange is connected to the upper gallbladder by injection molding.

[0012] In the optional technical scheme of the manufacturing method of the above-mentioned crystal gall, the casting annular shell includes: casting an annular shell having multiple main top holes; wherein the main top holes are located on the end surface of the shell away from the opening, a main top hole is arranged between two adjacent reinforcing rib groups, and the head has multiple avoidance openings corresponding to each of the main top holes one by one, the main top holes and the avoidance openings are used to install pre-connected bolts, and the pre-connected bolts are used to connect the shell and the electric water heater shell.

[0013] In the optional technical scheme of the manufacturing method of the above-mentioned crystal gallbladder, the injection molding of the lower gallbladder and the upper gallbladder includes: injection molding a lower gallbladder and an upper gallbladder with multiple overflow grooves; wherein the overflow grooves are respectively located on the inner side of the lower gallbladder welding end, the outer side of the lower gallbladder welding end, the inner side of the upper gallbladder welding end and the outer side of the upper gallbladder welding end, and the overflow grooves on the lower gallbladder welding end correspond to the overflow grooves on the upper gallbladder welding end; injection molding a lower gallbladder whose outer wall is a smoothly extended inclined surface, and the smoothly extended inclined surface intersects with the lower gallbladder welding end; injection molding an upper gallbladder whose outer wall is a smoothly extended inclined surface, and the smoothly extended inclined surface intersects with the upper gallbladder welding end; the smoothly extended inclined surface of the lower gallbladder intersects with the smoothly extended inclined surface of the upper gallbladder.

[0014] In the optional technical scheme of the manufacturing method of the above-mentioned crystal gallbladder, the welding of the upper gallbladder welding end and the lower gallbladder welding end includes: welding the upper gallbladder welding end and the lower gallbladder welding end by a welding process of vibration friction welding or infrared welding, and after the welding is completed, the outer overflow of the outer wall of the injection-molded crystal gallbladder is removed by turning.

[0015] In a second aspect, the embodiments of the present application provide a crystal gallbladder manufactured using the above-mentioned method for manufacturing a crystal gallbladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the connection structure between the upper chamber and the flange in the crystal chamber in one embodiment of the present application;

[0018] Figure 2 It is a cross-sectional schematic diagram of a flange and an upper chamber in a crystal chamber in an embodiment of the present application;

[0019] Figure 3 It is a cross-sectional schematic diagram of a flange, an upper chamber and a lower chamber in a crystal chamber in an embodiment of the present application;

[0020] Figure 4 yes Figure 3 A magnified view of part A;

[0021] Figure 5 This is a schematic diagram of the connection structure between the upper chamber and the flange in the crystal chamber in another embodiment of the present application;

[0022] Figure 6 It is a flow chart of the method for manufacturing the crystal gallbladder provided in the embodiment of the present application.

[0023] Reference numerals:

[0024] 100-lower gallbladder; 110-lower gallbladder welding end;

[0025] 200-upper gallbladder; 210-upper gallbladder welding end; 220, upper gallbladder head end;

[0026] 300-flange; 310-inner extension edge; 320-reinforcement edge; 330-outer extension edge; 340-main top hole; 350-side positioning hole;

[0027] 400-head;

[0028] 500-peripheral fiber layer;

[0029] 600-Reinforcement ribs;

[0030] 700-Overflow chute;

[0031] 800-Pre-attached bolts.

[0032] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0035] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more optional or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way.

[0036] As mentioned above, the main structure of the storage type electric water heater includes: inner tank, heating tube, thermostat, water level controller, safety valve, etc. Among them, the inner tank is the core component of the storage type electric water heater, which is a closed container for storing hot water.

[0037] The end cap of the inner tank is equipped with a flange, which is used to connect the inner tank and the water storage type electric water heater shell for installation and maintenance. However, in the current technical level, the inner tank has at least the following two technical problems.

[0038] Technical problem 1: The flange on the inner tank head is fixed to the inner tank by bolting. The bolts penetrate the inner tank head. During the long-term use of the storage electric water heater, the inner tank will expand and contract periodically. Over time, the inner tank is prone to leakage at the bolt joints.

[0039] Technical problem 2: Currently, there are plastic liners, most of which are produced by blow molding. However, the wall thickness of the plastic liners produced by blow molding is uneven. During daily use, the bottom and side walls of the plastic liners are prone to water seepage, posing a safety risk.

[0040] Therefore, in order to improve or solve the above technical problems, the embodiments of the present application provide a method for manufacturing a crystal bladder and a crystal bladder. In the technical solution provided by the embodiments of the present application, first, the flange is directly embedded in the head of the upper bladder, and the head of the upper bladder covers the flange. Instead of using the traditional connection method of bolts passing through the head, the connection between the flange and the head is particularly stable and has good sealing performance. The inner bladder will not leak easily at the bolt joint due to the periodic thermal expansion and contraction of the inner bladder. Second, the upper bladder and the lower bladder are both manufactured and welded using the injection molding process, and the wall thickness is more uniform. In daily use, the bottom and side walls of the inner bladder are not easy to seep water; the flange and the upper bladder are connected using the injection molding process, and the connection is more stable and firm, and the water sealing performance is better.

[0041] Reference below Figure 1-Figure 6 The manufacturing method of the crystal gall and the crystal gall provided in the embodiments of the present application are described in detail.

[0042] Figure 6 This is a flow chart of the method for manufacturing a crystal gallbladder provided in the embodiment of the present application. Please refer to Figure 6 The present invention provides a method for manufacturing a crystal gallbladder, comprising the following steps:

[0043] S101: Injection molding the lower liner 100 and the upper liner 200; wherein, one end of the lower liner 100 is opened to form a lower liner welding end 110, and both ends of the upper liner 200 are opened to form an upper liner welding end 210 and an upper liner sealing end 220.

[0044] Injection molding the lower liner 100 and the upper liner 200 includes: adding materials into the material bin of the injection molding machine, using one or more injection molding machines to respectively mold the lower liner 100 and the upper liner 200, and temporarily storing the surplus lower liner 100 and the upper liner 200. The reason why the lower liner 100 and the upper liner 200 are separately molded instead of directly molding the crystal liner as a whole is that if the crystal liner as a whole is directly molded, due to the higher difficulty of injection molding, it may cause uneven wall thickness of the crystal liner, which is easy to crack and leak in later use. After separately molding the lower liner 100 and the upper liner 200 and then welding, the difficulty of injection molding can be reduced, and the wall thickness of the crystal liner can be further ensured to be uniform, so as to avoid cracking and leaking of the crystal liner in later use.

[0045] Please refer to Figure 3 and Figure 4 , illustratively, one end of the lower gallbladder 100 is opened to form a lower gallbladder welding end 110, and both ends of the upper gallbladder 200 are opened to form an upper gallbladder welding end 210 and an upper gallbladder sealing end 220. The lower gallbladder 100 and the upper gallbladder 200 both have a plurality of overflow grooves 700, which are respectively located on the inner side of the lower gallbladder welding end 110, the outer side of the lower gallbladder welding end 110, the inner side of the upper gallbladder welding end 210, and the outer side of the upper gallbladder welding end 210, and the overflow grooves 700 on the lower gallbladder welding end 110 correspond to the overflow grooves 700 on the upper gallbladder welding end 210.

[0046] Please refer to Figure 3 and Figure 4 Exemplarily, the outer wall of the lower gallbladder 100 has a smoothly extended inclined surface, which intersects with the lower gallbladder welding end 110; the outer wall of the upper gallbladder 200 has a smoothly extended inclined surface, which intersects with the upper gallbladder welding end 210; the smoothly extended inclined surface of the lower gallbladder 100 intersects with the smoothly extended inclined surface of the upper gallbladder 200.

[0047] For example, the lower liner 100 and the upper liner 200 are molded by a center-injection method, wherein the injection gate is located at the center of the injection mold, the injection gate is in a sheet shape, and the gate is cut off after the injection molding is completed. The center-injection method can ensure that the lower liner 100 and the upper liner 200 are filled evenly during injection molding.

[0048] S102: Casting flange 300.

[0049] The flange 300 is cast by a casting machine, and the raw material of the cast flange 300 can be an aluminum alloy material or BTC330R steel.

[0050] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 Exemplarily, the flange 300 includes: an annular shell, wherein the shell has an inner cavity and an opening communicating with the inner cavity.

[0051] Please refer to Figure 2 For example, a plurality of reinforcing rib groups are integrally formed in the inner cavity, and each reinforcing rib group is evenly spaced around the circumference of the shell, and each reinforcing rib group has at least two reinforcing ribs 600 arranged at intervals. The reinforcing ribs 600 can strengthen the overall structural strength of the flange 300, and when the flange 300 is connected to the upper bladder 200 by injection molding and the crystal bladder is used in daily life, sufficient strength of the injection molding connection and stability of the crystal bladder in daily use can be ensured.

[0052] Please refer to Figure 1 and Figure 2 Exemplarily, the shell has an inner extension edge 310, which is a first flange extending toward the inner circle of the shell. When the flange 300 is subsequently connected to the head 400 by injection molding, the inner extension edge 310 increases the contact area between the flange 300 and the head 400, thereby enhancing the firmness of the connection between the flange 300 and the head 400.

[0053] Please refer to Figure 1 and Figure 2 Exemplarily, the shell has a reinforcing edge 320, which is hooked and connected with the inner extension edge 310, and the reinforcing edge 320 extends to the outer peripheral side of the shell through the opening of the shell, and the ends of each reinforcing rib 600 facing the shell opening are all in contact with the reinforcing edge 320, and there is a gap between the reinforcing edge 320 and the inner circle of the shell. When the flange 300 and the head 400 are subsequently injection-molded, the reinforcing edge 320 increases the contact area between the flange 300 and the head 400, thereby strengthening the firmness of the connection between the flange 300 and the head 400.

[0054] Please refer to Figure 1 and Figure 2 Exemplarily, the shell has an outer extension edge 330, which is a second flange extending toward the outer ring of the shell. The outer extension edge 330 is located on the outer peripheral side of the shell. During injection molding, the mold can clamp the flange 300 through the outer extension edge 330, which is conducive to further stable positioning of the flange 300, further ensuring the connection stability between the flange 300 and the upper tank 200 after injection molding, and further improving the yield rate of injection molded crystal tanks.

[0055] Please refer to Figure 5 Exemplarily, the shell has a plurality of side positioning holes 350, which are located on the outer ring of the shell and are evenly spaced around the circumference of the shell. Each side positioning hole 350 is connected to the inner cavity. The side positioning holes 350 are used to position the flange 300 when the flange 300 is connected to the upper liner 200 by injection molding. When the flange 300 is connected to the upper liner 200 by injection molding, the mold can further position the circumference of the flange 300 through each side positioning hole 350, thereby improving the positioning accuracy of the flange 300.

[0056] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 Exemplarily, the shell has a plurality of main top holes 340, which are located on the end surface of the shell away from the outlet, and a main top hole 340 is arranged between two adjacent reinforcing rib groups, and each main top hole 340 is staggered with each side positioning hole 350. The main top hole 340 is used to install pre-connected bolts 800, and the pre-connected bolts 800 are used to connect the shell and the electric water heater shell. The main top hole 340 is also used for the mold insert to pass through the main top hole 340 and press on the flange 300, so as to increase the strength of the injection molding flange 300, and to avoid irregular deformation of the crystal gall during cooling and solidification.

[0057] S103: Clamp the flange 300 and the upper liner 200 on two opposite stations with a spacing therebetween of the injection molding machine, and injection-mold the flange 300 on the upper liner 200 to form a head 400 between the flange 300 and the upper liner head end 220; wherein the head 400 wraps at least a portion of the flange 300.

[0058] Please refer to Figure 2 , Figure 3 and Figure 5 Exemplarily, the shell is located in the accommodating cavity of the head 400, and only the outer extension edge 330 is located outside the head 400. The inner extension edge 310 and the reinforcement edge 320 are both located in the accommodating cavity of the head 400. A part of the head 400 is filled in the gap between the reinforcement edge 320 and the inner circle of the shell. The head 400 has multiple avoidance openings corresponding to each main top hole 340.

[0059] The flange 300 is injection molded on the upper gallbladder head end 220 by using a center-injection injection molding method, wherein the injection gate is located at the center of the injection mold, and the injection gate is in a sheet shape, and the gate is cut off after the injection molding is completed. The center-injection injection molding method can ensure that the flange 300 is injection molded on the upper gallbladder head end 220 during injection molding.

[0060] The flange 300 is directly embedded in the head 400 of the upper liner 200. The head 400 of the upper liner 200 covers the flange 300. Instead of adopting the traditional connection method of bolts passing through the head 400, the connection between the flange 300 and the head 400 is particularly stable and has good sealing performance. The inner liner will not leak easily at the bolt joint due to the periodic thermal expansion and contraction of the inner liner.

[0061] S104: welding the upper chamber welding end 210 and the lower chamber welding end 110 to connect the upper chamber 200 and the lower chamber 100 to form an injection-molded crystal chamber.

[0062] Exemplarily, the upper gallbladder welding end 210 and the lower gallbladder welding end 110 are welded by a welding process of vibration friction welding or infrared welding. After the welding is completed, the outer overflow of the outer wall of the injection-molded crystal gallbladder is removed by turning. The advantages of vibration friction welding include: fast and flexible, the welding process is stable and repeatable, the welding quality is excellent, it does not have to rely on skilled welders, the preparation work can be reduced to a minimum, no flux is required, it is beneficial to the environment, and no welding fumes are generated. The advantages of infrared welding include: fast, efficient, energy-saving, environmentally friendly and many other advantages. Compared with traditional welding methods, infrared welding can greatly reduce heat transfer losses and material consumption, thereby improving production efficiency and reducing production costs. In addition, infrared welding does not produce harmful substances such as waste gas and waste slag, and is environmentally friendly.

[0063] When the upper liner 200 and the lower liner 100 are welded, the excess solder will enter the overflow groove 700, reducing the adverse effects of excessive solder overflow on the inner and outer joint surfaces of the upper liner 200 and the lower liner 100. The outer welding seams of the upper liner 200 and the lower liner 100 are set as inclined surfaces extending smoothly toward the two ends of the injection-molded crystal liner, avoiding the traditional process of cutting off the stepped outer welding seams of the upper liner 200 and the lower liner 100, which not only improves the production efficiency, but also strengthens the welding firmness of the upper liner 200 and the lower liner 100.

[0064] The upper liner 200 and the lower liner 100 are both manufactured and welded by injection molding, and the wall thickness is more uniform. During daily use, the bottom and side walls of the inner liner are not easy to seep water.

[0065] S105: Arrange an outer fiber layer 500 on the outer wall of the injection-molded crystal bladder.

[0066] Please refer to Figure 2 , Figure 3 and Figure 4 The outer fiber layer 500 tightly wraps the injection molded crystal bladder. Specifically, the outer fiber layer 500 can be wrapped around the injection molded crystal bladder in a circle, that is, the outer fiber layer 500 itself includes a multi-layer structure. The outer fiber layer 500 covers the connection between the flange 300 and the upper bladder 200. The outer fiber layer 500 wraps and constrains the upper bladder 200 and the flange 300, further strengthening the connection firmness and sealing of the flange 300 and the upper bladder 200. The outer fiber layer 500 also strengthens the overall structural strength and sealing of the injection molded crystal bladder.

[0067] The embodiment of the present application also provides a crystal bulb, which is manufactured using the above-mentioned method for manufacturing the crystal bulb.

[0068] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0069] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0070] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0071] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0072] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for manufacturing a crystal gallbladder, characterized in that: The following steps are involved: Injection molding of the lower bladder and the upper bladder; wherein one end of the lower bladder is opened to form a lower bladder welding end, and both ends of the upper bladder are opened to form an upper bladder welding end and an upper bladder sealing end; Casting flange; The flange and the upper liner are clamped on two opposite stations with a distance between them on an injection molding machine, and the flange is injection-molded on the upper liner to form a head between the flange and the upper liner head end; wherein the head wraps at least a portion of the flange; Welding the upper chamber welding end and the lower chamber welding end to connect the upper chamber and the lower chamber to form an injection-molded crystal chamber; An outer fiber layer is arranged on the outer wall of the injection-molded crystal bladder.

2. The method for manufacturing a crystal gallbladder according to claim 1, characterized in that: The step of injection molding the lower bladder and the upper bladder or the step of injection molding the flange on the upper bladder head end comprises: The lower liner and the upper liner are injected by a center-pouring injection molding method, or the flange is injected on the upper liner head end, wherein the injection gate is located at the center of the injection mold, and the injection gate is sheet-shaped, and the gate is cut off after the injection molding is completed.

3. The method for manufacturing a crystal gallbladder according to claim 1, characterized in that: The cast flange comprises: A cast annular shell; wherein the shell has an inner cavity and an opening connected to the inner cavity, the inner cavity has a plurality of reinforcing rib groups, each of the reinforcing rib groups is evenly spaced around the circumference of the shell, each reinforcing rib group has at least two reinforcing ribs arranged at intervals, and the shell is located in the accommodating cavity of the head.

4. The method for manufacturing a crystal gallbladder according to claim 3, characterized in that: The cast annular casing comprises: An annular shell having an inner extending edge is cast; wherein the inner extending edge is a first flange extending toward the inner ring of the shell, and the inner extending edge is located in the accommodating cavity.

5. The method for manufacturing a crystal gallbladder according to claim 4, characterized in that: The casting has an annular shell with an inner extending edge, comprising: A ring-shaped shell is cast with an inner extension edge, a reinforcement edge and an outer extension edge; wherein the reinforcement edge is hooked and connected with the inner extension edge, and the reinforcement edge extends to the outside of the shell through the opening, and the end of each reinforcing rib facing the opening is in contact with the reinforcement edge, and there is a gap between the reinforcement edge and the inner ring of the shell, and the head is filled in the gap; wherein the outer extension edge is a second flange extending toward the outer ring of the shell, and the outer extension edge is located outside the accommodating cavity.

6. The method for manufacturing a crystal gallbladder according to any one of claims 3 to 5, characterized in that: The cast annular casing comprises: A ring-shaped shell is cast with a plurality of side positioning holes; wherein the side positioning holes are located on the outer ring of the shell and are evenly spaced around the circumference of the shell, each of the side positioning holes is connected to the inner cavity, and the side positioning holes are used to position the flange when the flange is connected to the upper liner by injection molding.

7. The method for manufacturing a crystal gallbladder according to any one of claims 3 to 5, characterized in that: The cast annular casing comprises: A ring-shaped shell having a plurality of main top holes is cast; wherein the main top holes are located on the end surface of the shell away from the opening, a main top hole is arranged between two adjacent reinforcing rib groups, the end cover has a plurality of avoidance openings corresponding one to one with each of the main top holes, the main top holes and the avoidance openings are used for installing pre-connected bolts, and the pre-connected bolts are used to connect the shell and the outer shell of the electric water heater.

8. The method for manufacturing a crystal gallbladder according to claim 1, characterized in that: The injection molded lower bladder and upper bladder include: Injection molding a lower bladder and an upper bladder with a plurality of overflow grooves; wherein the overflow grooves are respectively located on the inner side of the lower bladder welding end, the outer side of the lower bladder welding end, the inner side of the upper bladder welding end and the outer side of the upper bladder welding end, and the overflow groove on the lower bladder welding end corresponds to the overflow groove on the upper bladder welding end; The injection molded outer wall is a lower bladder with a smoothly extending inclined surface, and the smoothly extending inclined surface intersects with the welding end of the lower bladder; The injection-molded outer wall is an upper bladder with a smoothly extending inclined surface, and the smoothly extending inclined surface intersects with the welding end of the upper bladder; the smoothly extending inclined surface of the lower bladder intersects with the smoothly extending inclined surface of the upper bladder.

9. The method for manufacturing a crystal gallbladder according to claim 1, characterized in that: The step of welding the upper gallbladder welding end and the lower gallbladder welding end comprises: The upper gallbladder welding end and the lower gallbladder welding end are welded by a welding process of vibration friction welding or infrared welding. After the welding is completed, the outer overflow of the outer wall of the injection-molded crystal gallbladder is removed by turning.

10. Crystal gallbladder, characterized in that, The crystal gallbladder is manufactured by the manufacturing method of any one of claims 1 to 9.

Images