A kind of thermos pot and its manufacturing method

Abstract

The invention discloses a thermos pot and a manufacturing method thereof, comprising a pot cover, an outer shell, and an inner liner, wherein the inner liner is contained in the outer shell, the inner liner mouth is connected to the outer shell mouth and forms a vacuum layer, the pot cover is covered on the outer shell and respectively contacts the outer shell and the inner liner, the outer shell mouth is provided with an upper flange, a middle flange, and a lower flange connected in sequence, the inner side of the middle flange is connected to the inner liner mouth, the outer side of the middle flange contacts the pot cover, the upper flange and the middle flange are perpendicular to each other, and the lower flange contacts the pot cover. Through the above design, the invention makes the sealing performance and structural strength of the thermos pot better.

Description

Technical Field

[0001] The invention relates to the technical field of thermos pots, and in particular to a thermos pot and a manufacturing method thereof. Background Art

[0002] Thermos pots are designed mainly for the inherent characteristics of homes, conferences and other places. They evolved from thermos bottles and cups. The sealing performance of thermos pots currently on the market is often difficult to guarantee, especially the matching structure error between the inner liner and the outer shell is large, which affects the product quality, so improvements need to be made. Summary of the invention

[0003] Aiming at the defects in the prior art that the sealing performance is difficult to ensure, the present invention provides a new thermos pot and a manufacturing method thereof.

[0004] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0005] A thermos pot comprises a pot cover, an outer shell, and an inner liner, wherein the inner liner is accommodated in the outer shell, the inner liner mouth is connected to the outer shell mouth to form a vacuum layer, the pot cover covers the outer shell and respectively contacts the outer shell and the inner liner, the outer shell mouth is provided with an upper flange, a middle flange, and a lower flange connected in sequence, the inner side of the middle flange is connected to the inner liner mouth, the outer side of the middle flange contacts the pot cover, the upper flange and the middle flange are perpendicular to each other, and the lower flange contacts the pot cover.

[0006] The vacuum layer is used for heat preservation, which improves the heat preservation performance of the present invention. The outer shell mouth is designed to be composed of three parts: an upper flange, a middle flange, and a lower flange. The flange structure can reduce the accumulated errors of each process in the manufacturing process. The inner side of the middle flange is connected to the inner liner mouth, and the outer side of the middle flange is in conflict with the pot lid. The design of the concentrated connection area reduces the matching error and improves the sealing performance of the present invention. The lower flange is in conflict with the pot lid, which improves the local structural strength, thereby improving the stability of the present invention. Through the above design, the present invention makes the sealing performance and structural strength of the thermos pot better.

[0007] Preferably, in the thermos pot described above, the inner shell mouth is provided with an outwardly inclined portion and a transition portion which are connected in sequence, the outwardly inclined portion is connected to the inner side of the middle flange, and the outwardly inclined portion is connected to the inner shell via the transition portion.

[0008] The outwardly inclined portion is used to connect the middle flange, which reduces the matching error and further improves the sealing performance of the invention. The transition portion plays the role of buffering and connecting the outwardly inclined portion, thereby improving the local structural strength and stability.

[0009] Preferably, in the thermos pot described above, the bottom of the outer shell is provided with a connecting end surface and a vacuum bottom, and the vacuum bottom is connected to the outer shell via the connecting end surface.

[0010] The connecting end surface is used for connecting the vacuum bottom, thereby improving the local structural strength and stability of the vacuum bottom connection.

[0011] Preferably, in the thermos pot described above, the vacuum bottom is provided with a welding arc and a transition arc which are connected in sequence, and the upper end surface of the welding arc is connected to the connecting end surface.

[0012] The welding arc is used for welding with the connecting end face, which can reduce the shrinkage caused by high temperature during welding and prevent the appearance of large pits after welding that affect product quality. The transition arc is used to buffer the connecting welding arc, so that the influence of deformation during welding is limited to the connection between the welding arc and the connecting end face, further improving the local structural strength and stability.

[0013] Preferably, in the thermos pot described above, the welding arc is tangent to a perpendicular line of the connecting end surface.

[0014] The above design further ensures the local structural strength and stability of the present invention.

[0015] Preferably, in the thermos pot described above, the welding arc is obliquely intersected with a perpendicular line of the connecting end surface.

[0016] The above design improves the applicability of the present invention, making it more difficult to form a pit after welding, thereby improving the local structural strength and sealing performance of the present invention.

[0017] Preferably, in the thermos pot described above, the pot lid comprises an upper cover, a middle ring and a mouth ring, the mouth ring is sleeved outside the outer shell mouth and respectively abuts against the middle flange and the lower flange, the middle ring is sleeved outside the outer shell mouth and covers the mouth ring, the middle ring is provided with a handle, the upper cover is connected to the middle ring, and the upper cover is provided with a small cover.

[0018] The upper cover is used to open and close the lid. The middle ring is used to improve the local structural strength, and a handle is provided for easy carrying, which improves the convenience of the invention. The mouth ring is used to improve the local structural strength, and further improves the sealing performance of the invention. The small cover is used for drinking water or adding ice cubes. The size of the small cover can be adapted to the size of ice cubes used for daily beverages, which improves the convenience of the invention.

[0019] Preferably, in the thermos pot described above, a small cover sealing ring is provided in the small cover, and an upper cover sealing ring is provided in the upper cover.

[0020] The small cover sealing ring and the upper cover sealing ring further improve the sealing performance of the present invention.

[0021] Preferably, in the thermos pot described above, an upper cover insulation layer is provided inside the upper cover, and a small cover insulation layer is provided inside the small cover.

[0022] The upper cover insulation layer and the small cover insulation layer further improve the thermal insulation performance of the present invention.

[0023] Preferably, the method for manufacturing the thermos pot described above comprises the following steps:

[0024] S1: Take a raw material tube for the shell, cut the tube, swell the tube with water, divide the tube into cups, cut the head, press the shoulders and bottom, flatten the mouth and bottom, flanging, press the flanging, flatten the flanging, and punch positioning grooves on the raw material tube for the shell in sequence to form an upper flanging, a middle flanging, and a lower flanging connected in sequence to obtain a shell, then take a raw material tube for the liner, cut the tube, swell the tube with water, divide the tube into cups, cut the head, trim the bottom, shrink the mouth, cut the head, press the shoulders, flatten the mouth and bottom, and press the mouth on the raw material tube for the liner in sequence to obtain a liner;

[0025] S2: placing the inner container into the outer shell, matching the inner container with the outer shell, then welding the inner side of the middle flange to the inner container opening, then taking the vacuum bottom, and welding the vacuum bottom to the bottom of the outer shell to obtain a semi-finished pot;

[0026] S3: Take the mouth ring, and put the mouth ring on the outer shell mouth of the semi-finished pot, then take the middle ring, and put the middle ring on the outer shell mouth of the semi-finished pot and cover the mouth ring, and finally take the upper cover, and cover the upper cover on the middle ring to complete the manufacture of the thermos pot.

[0027] Step S1 is used to manufacture the outer shell and the inner liner, and the design of the upper flange, the middle flange, and the lower flange can reduce the cumulative error of each process, thereby reducing the matching error of the present invention and improving the sealing performance and local structural strength of the present invention. Step S2 is used for welding the joint and the bottom, which improves the sealing performance of the present invention. Step S3 is used to assemble the pot lid, which ensures the user experience of the present invention and improves the convenience of the present invention.

[0028] Preferably, in the manufacturing method of the thermos pot described above, the process of flanging the outer shell raw material tube in step S1 includes: after flanging the outer shell raw material tube, a semi-finished inner liner is obtained, mold A is taken, and the semi-finished inner liner is placed in the lower mold of mold A, so that the punch of mold A is in contact with the lower flange, and then the upper mold of mold A is pressed down to start mold closing, so that the half of mold A is tightened and pushed toward the middle flange, and the movable plate of mold A is pressed down to tighten the upper flange to complete the flanging process.

[0029] By pressing the flanging by the mold A, the size error of the upper flanging, the middle flanging and the lower flanging is further reduced, and the sealing performance and local structural strength of the present invention are improved. The punch is adapted to the mouth of the shell, and the flanging is pressed from the inside to the outside when the mold A is closed. The half is tightened and the movable plate is pressed down to press out the flanging of the required size, with smaller error and higher manufacturing efficiency.

[0030] Preferably, in the above-mentioned method for manufacturing a thermos pot, after the inner liner raw material tube is pressed into a mouth in step S1, an outwardly inclined portion and a transition portion connected in sequence are formed.

[0031] The outwardly inclined portion is used to connect the center flange in the fitting process of the outer shell and the inner liner, which reduces the fitting error and improves the sealing performance of the invention. The transition portion plays the role of buffering and connecting the outwardly inclined portion, improving the local structural strength and stability.

[0032] Preferably, in the manufacturing method of a thermos pot described above, the matching process of the inner liner and the outer shell in step S2 includes: taking mold B, placing the outer shell on the lower positioning sleeve of the lower mold of mold B and making the upper flange abut against the fitting position, then placing the inner liner into the outer shell and making the mouth of the inner liner abut against the fitting position on the spring clip assembly of the lower mold of mold B, and then inserting the upper positioning sleeve of the upper mold of mold B between the outer shell and the inner liner to complete the positioning, then the upper mold of mold B starts to push downward, the spring clip assembly tightens the mouth of the inner liner, and the spring clip assembly moves downward together with the inner liner, so that the outwardly inclined portion abuts against the middle flange to the fitting position, and the matching process is completed.

[0033] Through the matching of mold B, the matching error of the outer shell and the inner liner is further reduced, and the manufacturing efficiency is higher. The lower positioning sleeve is used to locate the position of the outer shell, so that the outer shell is positioned more accurately, thereby reducing the error. The spring clip assembly is used to tighten the mouth of the inner liner, which solves the problem of difficulty in matching due to the out-of-roundness of the outer shell or the inner liner, improves the applicability of the present invention, and reduces the error. The upper positioning sleeve contacts the inner liner, and the force is more evenly applied, which avoids deformation of the inner liner, thereby reducing the error. At the same time, because the upper positioning sleeve is between the inner liner and the outer shell, the distance between the inner liner and the outer shell is guaranteed, which improves the stability of the present invention. On the other hand, the position where the upper positioning sleeve contacts the inner liner can be corrected by the arc taper without deliberate alignment, further reducing the error.

[0034] Preferably, in the manufacturing method of the thermos flask described above, welding the vacuum bottom to the bottom of the outer shell in step S2 includes: processing the vacuum bottom to form a welding arc and a transition arc, processing the bottom of the outer shell to form a connecting end face, welding the welding arc to the connecting end face, the welding arc is tangent to or obliquely intersects the vertical line of the connecting end face, and completing the welding of the vacuum bottom to the bottom of the outer shell.

[0035] The connecting end face is used to connect the vacuum bottom, which improves the local structural strength and stability of the vacuum bottom welding. The welding arc is used to weld with the connecting end face, which can reduce the shrinkage caused by high temperature during welding and prevent the appearance of large pits after welding that affect product quality. The transition arc plays a buffering and transition role, so that the influence of deformation during welding is limited to the connection between the welding arc and the connecting end face, further improving the local structural strength and stability. The welding arc is tangent or oblique to the vertical line of the connecting end face, which further improves the applicability of the present invention, making it more difficult to form pits after welding, and further improving the local structural strength and sealing performance of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention;

[0037] Figure 2 It is a partial cross-sectional view of the present invention;

[0038] Figure 3 for Figure 2 A magnified view of part A;

[0039] Figure 4 It is an exploded view of the pot cover in the present invention;

[0040] Figure 5 It is a schematic diagram of the local structure of the present invention;

[0041] Figure 6 It is a schematic diagram of the structure of the housing in the present invention;

[0042] Figure 7 It is a schematic diagram of the structure of the inner container in the present invention;

[0043] Figure 8 It is a structural schematic diagram of a semi-finished pot in the present invention;

[0044] Fig. 9 It is a structural schematic diagram of the mold A in the present invention;

[0045] Fig.10 It is a schematic diagram of the structure of mold B in the present invention. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-10 The present invention is further described in detail with specific embodiments, but they are not intended to limit the present invention:

[0047] Example 1

[0048] A thermos pot comprises a pot cover 1, an outer shell 2, and an inner liner 3. The inner liner 3 is accommodated in the outer shell 2. The mouth of the inner liner 3 is connected to the mouth of the outer shell 2 to form a vacuum layer 21. The pot cover 1 covers the outer shell 2 and contacts the outer shell 2 and the inner liner 3 respectively. The mouth of the outer shell 2 is provided with an upper flange 22, a middle flange 23, and a lower flange 24 connected in sequence. The inner side of the middle flange 23 is connected to the mouth of the inner liner 3, and the outer side of the middle flange 23 contacts the pot cover 1. The upper flange 22 and the middle flange 23 are perpendicular to each other, and the lower flange 24 contacts the pot cover 1.

[0049] Preferably, the mouth of the inner liner 3 is provided with an outwardly inclined portion 31 and a transition portion 32 which are connected in sequence, the outwardly inclined portion 31 is connected to the inner side of the middle flange 23 , and the outwardly inclined portion 31 is connected to the inner liner 3 via the transition portion 32 .

[0050] Preferably, a connecting end surface 25 and a vacuum bottom 26 are provided at the bottom of the outer shell 2 , and the vacuum bottom 26 is connected to the outer shell 2 via the connecting end surface 25 .

[0051] Preferably, a welding arc 261 and a transition arc 262 which are connected in sequence are provided on the vacuum bottom 26 , and an upper end surface of the welding arc 261 is connected to the connecting end surface 25 .

[0052] Preferably, the pot lid 1 includes an upper cover 11, a middle ring 12, and a mouth ring 13. The mouth ring 13 is sleeved outside the mouth of the outer shell 2 and respectively contacts the middle flange 23 and the lower flange 24. The middle ring 12 is sleeved outside the mouth of the outer shell 2 and covers the mouth ring 13. A handle 121 is provided on the middle ring 12. The upper cover 11 is connected to the middle ring 12. A small cover 111 is provided on the upper cover 11.

[0053] Preferably, a small cover sealing ring 112 is provided in the small cover 111 , and an upper cover sealing ring 113 is provided in the upper cover 11 .

[0054] Preferably, an upper cover insulation layer 114 is provided in the upper cover 11 , and a small cover insulation layer 115 is provided in the small cover 111 .

[0055] As a preference, the method comprises the following steps:

[0056] S1: Take a raw material tube for the shell, cut the tube, swell the tube with water, divide the tube into cups, cut the head, press the shoulders and bottom, flatten the mouth and bottom, flanging, press the flanging, flatten the flanging, and punch positioning grooves on the raw material tube for the shell, so as to form an upper flanging 22, a middle flanging 23, and a lower flanging 24 connected in sequence and obtain the shell 2, then take a raw material tube for the liner, cut the tube, swell the tube with water, divide the tube into cups, cut the head, trim the bottom, shrink the mouth, cut the head, press the shoulders, flatten the mouth and bottom, and press the mouth on the raw material tube for the liner, so as to obtain the liner 3;

[0057] S2: putting the inner pot 3 into the outer shell 2, matching the inner pot 3 with the outer shell 2, then welding the inner side of the middle flange 23 to the mouth of the inner pot 3, then taking the vacuum bottom 26, and welding the vacuum bottom 26 to the bottom of the outer shell 2 to obtain a semi-finished pot;

[0058] S3: Take the mouth ring 13, and put the mouth ring 13 on the mouth of the outer shell 2 of the semi-finished pot, then take the middle ring 12, and put the middle ring 12 outside the mouth of the outer shell 2 of the semi-finished pot and cover the mouth ring 13, finally take the upper cover 11, and cover the upper cover 11 on the middle ring 12 to complete the manufacture of the thermos pot.

[0059] Preferably, the flanging process of the shell raw material tube in step S1 includes: after flanging the shell raw material tube, a semi-finished inner liner is obtained, mold A is taken, and the semi-finished inner liner is placed in the lower mold of mold A, so that the punch 4 of mold A contacts the lower flange 24, and then the upper mold of mold A is pressed down to start mold closing, so that the half 5 of mold A is tightened and pushed against the middle flange 23, and the movable plate 6 of mold A presses down and presses the upper flange 22 to complete the flanging process.

[0060] Preferably, after the inner liner raw material tube is pressed in step S1, an outwardly inclined portion 31 and a transition portion 32 which are connected in sequence are formed.

[0061] Preferably, the matching process of the inner liner 3 and the outer shell 2 in step S2 includes: taking mold B, placing the outer shell 2 on the lower positioning sleeve 7 of the lower mold of mold B and making the upper flange 22 abut against the fitting position, then placing the inner liner 3 into the outer shell 2 and making the mouth of the inner liner 3 abut against the fitting position on the spring clip assembly 8 of the lower mold of mold B, and then inserting the upper positioning sleeve 9 of the upper mold of mold B between the outer shell 2 and the inner liner 3 to complete the positioning, then the upper mold of mold B starts to push downward, the spring clip assembly 8 tightens the mouth of the inner liner 3, and the spring clip assembly 8 moves downward together with the inner liner 3, so that the outwardly inclined portion 31 abuts against the middle flange 23 to the fitting position, and the matching process is completed.

[0062] Preferably, welding the vacuum bottom 26 to the bottom of the outer shell 2 in step S2 includes: processing the vacuum bottom 26 to form a welding arc 261 and a transition arc 262, processing the bottom of the outer shell 2 to form a connecting end face 25, welding the welding arc 261 to the connecting end face 25, the welding arc 261 is tangent to or obliquely intersects a vertical line of the connecting end face 25, and completing the welding of the vacuum bottom 26 to the bottom of the outer shell 2.

[0063] Example 2

[0064] Preferably, the welding arc 261 is tangent to a perpendicular line of the connecting end surface 25 .

[0065] The rest is the same as Example 1.

[0066] Example 3

[0067] Preferably, the welding arc 261 is obliquely intersected with a perpendicular line of the connecting end surface 25 .

[0068] The rest is the same as Example 1.

[0069] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A thermos pot, comprising a pot cover (1), an outer shell (2), and an inner liner (3), wherein the inner liner (3) is accommodated in the outer shell (2), an opening of the inner liner (3) is connected to an opening of the outer shell (2) to form a vacuum layer (21), and the pot cover (1) covers the outer shell (2) and contacts the outer shell (2) and the inner liner (3), respectively, characterized in that: The mouth of the outer shell (2) is provided with an upper flange (22), a middle flange (23), and a lower flange (24) which are connected in sequence; the inner side of the middle flange (23) is connected to the mouth of the inner liner (3); the outer side of the middle flange (23) contacts the pot lid (1); the upper flange (22) and the middle flange (23) are perpendicular to each other; the lower flange (24) contacts the pot lid (1); the bottom of the outer shell (2) is provided with a connecting end surface (25) and a vacuum bottom (26); the vacuum bottom (26) is connected to the outer shell (2) via the connecting end surface (25); the vacuum bottom (26) is provided with a welding arc (261) and a transition arc (262) which are connected in sequence; The upper end surface of the welding arc (261) is connected to the connecting end surface (25), and the vertical line of the welding arc (261) and the connecting end surface (25) is obliquely intersected. The pot cover (1) comprises an upper cover (11), a middle ring (12), and a mouth ring (13). The mouth ring (13) is sleeved outside the mouth of the shell (2) and respectively contacts the middle flange (23) and the lower flange (24). The middle ring (12) is sleeved outside the mouth of the shell (2) and covers the mouth ring (13). A handle (121) is provided on the middle ring (12). The upper cover (11) is connected to the middle ring (12). A small cover (111) is provided on the upper cover (11). The manufacturing method comprises the following steps: S1: Take a raw material tube for the shell, and sequentially perform tube cutting, water swelling, cup division, head cutting, shoulder pressing, bottom pressing, flat mouth and flat bottom, flanging, flanging, flat flanging, and positioning groove punching on the raw material tube for the shell, so as to form an upper flanging (22), a middle flanging (23), and a lower flanging (24) connected in sequence to obtain a shell (2), and then take a raw material tube for the liner, and sequentially perform tube cutting, water swelling, cup division, head cutting, bottom adjustment, mouth shrinking, head cutting, shoulder pressing, flat mouth and flat bottom, and mouth pressing on the raw material tube for the liner, so as to obtain a liner (3); S2: placing the inner container (3) into the outer shell (2), matching the inner container (3) with the outer shell (2), then welding the inner side of the middle flange (23) to the mouth of the inner container (3), then taking the vacuum bottom (26), and welding the vacuum bottom (26) to the bottom of the outer shell (2), thereby obtaining a semi-finished pot; S3: taking the mouth ring (13), and putting the mouth ring (13) on the mouth of the outer shell (2) of the semi-finished pot; then taking the middle ring (12), and putting the middle ring (12) outside the mouth of the outer shell (2) of the semi-finished pot and covering the mouth ring (13); finally taking the upper cover (11), and putting the upper cover (11) on the middle ring (12), thereby completing the manufacture of the thermos pot; The process of flanging the shell raw material tube in step S1 comprises: after flanging the shell raw material tube, a semi-finished inner liner is obtained, mold A is taken, and the semi-finished inner liner is placed in the lower mold of mold A, so that the convex mold (4) of mold A abuts against the lower flanging (24), and then the upper mold of mold A is pressed down to start mold closing, so that the half (5) of mold A is tightened and pressed against the middle flanging (23), and the movable plate (6) of mold A is pressed down to press the upper flanging (22) tightly, and the flanging process is completed; In step S1, after the inner liner raw material tube is pressed, an outwardly inclined portion (31) and a transition portion (32) connected in sequence are formed; The process of matching the inner liner (3) and the outer shell (2) in step S2 comprises: taking a mold B, placing the outer shell (2) on the lower positioning sleeve (7) of the lower mold of the mold B and making the upper flange (22) abut against the fitting position, then placing the inner liner (3) into the outer shell (2) and making the mouth of the inner liner (3) abut against the fitting position on the spring clamp assembly (8) of the lower mold of the mold B, then inserting the upper positioning sleeve (9) of the upper mold of the mold B between the outer shell (2) and the inner liner (3) to complete the positioning, then the upper mold of the mold B starts to push downward, the spring clamp assembly (8) tightens the mouth of the inner liner (3), and the spring clamp assembly (8) moves downward together with the inner liner (3) so that the outwardly inclined portion (31) abuts against the middle flange (23) to the fitting position, thereby completing the matching process.

2. The thermos pot according to claim 1, characterized in that: The mouth of the inner liner (3) is provided with an outwardly inclined portion (31) and a transition portion (32) which are connected in sequence; the outwardly inclined portion (31) is connected to the inner side of the middle flange (23); and the outwardly inclined portion (31) is connected to the inner liner (3) via the transition portion (32).

3. The thermos pot according to claim 1, characterized in that: A small cover sealing ring (112) is arranged in the small cover (111), and an upper cover sealing ring (113) is arranged in the upper cover (11).

4. The thermos pot according to claim 1, characterized in that: An upper cover heat-insulating layer (114) is provided in the upper cover (11), and a small cover heat-insulating layer (115) is provided in the small cover (111).

5. The method for manufacturing a thermos pot according to claim 1, characterized in that: In step S2, welding the vacuum bottom (26) to the bottom of the outer shell (2) comprises: processing the vacuum bottom (26) to form a welding arc (261) and a transition arc (262), processing the bottom of the outer shell (2) to form a connecting end face (25), welding the welding arc (261) to the connecting end face (25), wherein the vertical line of the welding arc (261) and the connecting end face (25) are obliquely intersected, thereby completing the welding of the vacuum bottom (26) to the bottom of the outer shell (2).

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