Vacuum cup vacuum welding process

Abstract

The invention discloses a vacuum welding process for a vacuum cup. Comprising the following steps that S1, a deformation part is formed at the cup bottom of a cup body, part of the edge of the deformation part is disconnected from the cup bottom, and a gap is formed; s2, the cup body is placed in a vacuum container in an inverted mode, and the vacuum container is vacuumized; s3, promoting the deformation part at the gap and / or the cup bottom to melt through the welding head so as to seal the exhaust port; and S4, taking out the cup body. When the deformation part of the cup bottom is formed, a plurality of disconnected gaps are synchronously formed to serve as the exhaust ports, the exhaust ports directly act on the gaps during welding operation, the gaps with small widths are closed through melting of the parts on the two sides of the gaps, the production qualification rate is increased, the production cost is reduced, the outer surface of the cup bottom is more attractive, and the production efficiency is improved. And further polishing operation is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of thermos cups, in particular to a vacuum welding process for thermos cups. Background Art

[0002] A thermos cup is generally a water container made of ceramic or stainless steel with a vacuum layer. It has a lid on the top and is tightly sealed. The vacuum insulation layer can delay the heat dissipation of the water or other liquids inside to achieve the purpose of heat preservation.

[0003] During the manufacturing process of the thermos cup, the air in the cavity is generally evacuated through an exhaust port connected to the vacuum layer cavity, and then the exhaust port is closed by melting a spherical metal block placed at the exhaust port, such as the disclosed patent document CN112894109B.

[0004] This method requires additional spherical metal blocks, which are easy to fall during the transfer of the cup body, thereby affecting the qualified rate of the cup body. At the same time, the spherical metal blocks also increase the production cost. For this reason, the applicant proposes another form of vacuum welding process for thermos cups. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a vacuum welding process for a thermos cup, which simultaneously forms a plurality of disconnected gaps as exhaust ports when the deformation portion of the cup bottom is formed, and directly acts on the gaps during welding, and closes the gaps with smaller widths by melting the portions on both sides of the gaps, thereby improving the production qualification rate, reducing the production cost, and making the outer surface of the cup bottom more beautiful without the need for further polishing.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions: A vacuum welding process for a thermos cup comprises the following steps: S1. A deformation portion is formed at the bottom of the cup body, and a portion of the edge of the deformation portion is disconnected from the bottom of the cup to form a gap; S2, placing the cup body upside down in a vacuum container, and evacuating the vacuum container; S3, using a welding head to melt the deformed portion at the gap and / or the cup bottom to close the exhaust port; S4. Take out the cup body.

[0007] In the above technical solution, preferably, the cup body comprises an outer cup body and an inner liner, and a cavity which can communicate with the external fluid only through the gap is formed between the outer cup body and the inner liner.

[0008] In the above technical solution, preferably, the shape of the edge of the deformation portion is circular, and the gaps are evenly distributed around the circumference.

[0009] In the above technical solution, preferably, the edge of the deformation portion is in a square shape, and includes a reinforcement portion at the edge, and the gap is located between two adjacent reinforcement portions.

[0010] In the above technical solution, preferably, in step S2, a plurality of cup bodies are placed upside down in a box body, and then the box body is placed in a vacuum container, and then the vacuum container is evacuated.

[0011] In the above technical scheme, preferably, in step S2 and step S3, several cup bodies are placed upside down in a box, and then the box is placed in a pre-evacuation chamber. At this time, the pre-evacuation chamber and the low-temperature heating chamber, the low-temperature heating chamber and the high-temperature heating chamber, and the high-temperature heating chamber and the welding chamber are isolated from each other by partitions, and the low-temperature heating chamber, the high-temperature heating chamber and the welding chamber are in a vacuum state. After covering the pre-evacuation chamber, the pre-evacuation chamber is evacuated. After reaching the set vacuum degree, the partition between the pre-evacuation chamber and the low-temperature heating chamber is opened, and the box is transferred to the low-temperature heating chamber and the corresponding partition is closed. After staying at the set value, the partition between the low-temperature heating chamber and the high-temperature heating chamber is opened, and the box is transferred to the high-temperature heating chamber and the corresponding partition is closed. After staying at the set value, the partition between the high-temperature heating chamber and the welding chamber is opened, and the box is transferred to the welding chamber and the corresponding partition is closed. After welding is completed, the cooling chamber is evacuated. After reaching the set vacuum degree, the partition between the welding chamber and the cooling chamber is opened, and the box is transferred to the cooling chamber. After closing the corresponding partition, the box is taken out from the cooling chamber.

[0012] In the above technical scheme, preferably, in step S2, a number of cup bodies are placed upside down in a box, and then the box is placed in a pre-vacuum chamber, and the pre-vacuum chamber is covered and evacuated to reach a set vacuum degree, and then the box is transferred to a low-temperature heating chamber, and the low-temperature heating chamber is evacuated to a set vacuum degree. After the box is heated in the low-temperature heating chamber for a set time, the box is transferred to a high-temperature heating chamber, and the high-temperature heating chamber is evacuated to a set vacuum degree. After the box is heated in the high-temperature heating chamber for a set time, the box is transferred to a welding chamber, and the welding chamber is evacuated to a set vacuum degree and then the welding operation of step S3 is performed.

[0013] In the above technical solution, preferably, in step S3, the welding head is a laser head or an electron beam welding machine.

[0014] In the above technical solution, preferably, the width of the gap is 0.1-0.2 mm.

[0015] In the above technical solution, preferably, the deformation portion and the gap are formed simultaneously during stamping.

[0016] The beneficial effects of the present invention are: The present invention forms a plurality of disconnected gaps as exhaust ports simultaneously when the deformation portion of the cup bottom is formed. During welding, the gaps are directly acted upon and the gaps with a smaller width are closed by melting the portions on both sides of the gaps. This improves the production qualification rate, reduces the production cost, and makes the outer surface of the cup bottom more beautiful without the need for further polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cup body of the circular deformation portion of the present invention.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of point D in the middle.

[0019] Figure 3 It is a schematic diagram of the cup body of the square deformation part of the present invention.

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of point E in the middle. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Example 1

[0022] See also Figure 1-Figure 4 , a vacuum welding process for a thermos cup, comprising the following steps: S1. A deformation portion 2 is formed at the bottom of the cup body 1 to form an edge 21 between the deformation portion 2 and the cup body 1. The deformation portion 2 at least includes a state of being concave toward the inside of the cup body 1 and a state of being convex toward the outside of the cup body. Part of the edge 21 of the deformation portion 2 is disconnected from the bottom of the cup and a gap 22 is formed. The cup body includes an outer cup body and an inner liner, and a cavity is formed between the outer cup body and the inner liner, which can only be connected to the external fluid through the gap.

[0023] S2, placing the cup body upside down in a vacuum container, and evacuating the vacuum container; S3, using a welding head to melt the deformed portion at the gap and / or the cup bottom to seal the exhaust port, the welding head being a laser head or an electron beam welding machine; S4. Take out the cup body.

[0024] The gap 22 formed on the cup body can be one or more places, and the shape of the edge 21 of the deformation part 2 can be specifically selected according to actual needs. As one of the options, the shape of the edge 21 of the deformation part 2 is circular, and the gap 22 is evenly distributed around the edge 21 of the deformation part 2, such as Figure 1 , Figure 2As shown; as one option, the shape of the edge 21 of the deformation portion 2 is square, and the edge 21 includes a reinforcement portion 23, and the gap 22 is located between two adjacent reinforcement portions 23.

[0025] The deformation part can be arranged at the center of the cup bottom, and it is recessed into the cup body to enhance the anti-deformation effect of the cup body.

[0026] In this embodiment, the width of the gap is 0.1-0.2 mm, the wall thickness of the outer cup body is 0.6-0.9 mm, and the wall thickness of the inner liner is 0.4-0.6 mm.

[0027] In this embodiment, the deformation portion and the gap are formed simultaneously during stamping. Example 2

[0028] See also Figure 1-Figure 4 , a vacuum welding process for a thermos cup, comprising the following steps: S1. A deformation portion 2 is formed at the bottom of the cup body 1 to form an edge 21 between the deformation portion 2 and the cup body 1. The deformation portion 2 at least includes a state of being concave toward the inside of the cup body 1 and a state of being convex toward the outside of the cup body. Part of the edge 21 of the deformation portion 2 is disconnected from the bottom of the cup and a gap 22 is formed. The cup body includes an outer cup body and an inner liner, and a cavity is formed between the outer cup body and the inner liner, which can only be connected to the external fluid through the gap.

[0029] S2, placing a plurality of cup bodies upside down in a box, then placing the box body in a vacuum container, and then evacuating the vacuum container; S3, using a welding head to melt the deformed portion at the gap and / or the cup bottom to seal the exhaust port, the welding head being a laser head or an electron beam welding machine; S4. Take out the cup body.

[0030] The gap 22 formed on the cup body can be one or more places, and the shape of the edge 21 of the deformation part 2 can be specifically selected according to actual needs. As one of the options, the shape of the edge 21 of the deformation part 2 is circular, and the gap 22 is evenly distributed around the edge 21 of the deformation part 2, such as Figure 1 , Figure 2 As shown; as one option, the shape of the edge 21 of the deformation portion 2 is square, and the edge 21 includes a reinforcement portion 23, and the gap 22 is located between two adjacent reinforcement portions 23.

[0031] The deformation part can be arranged at the center of the cup bottom, and it is recessed into the cup body to enhance the anti-deformation effect of the cup body.

[0032] In this embodiment, the width of the gap is 0.1-0.2 mm, the wall thickness of the outer cup body is 0.6-0.9 mm, and the wall thickness of the inner liner is 0.4-0.6 mm.

[0033] In this embodiment, the deformation portion and the gap are formed simultaneously during stamping. Example 3

[0034] See also Figure 1-Figure 4 A vacuum welding process for a thermos cup, the production line involved includes a pre-evacuation chamber, a low-temperature heating chamber, a high-temperature heating chamber, a welding chamber and a cooling chamber which are arranged adjacent to each other in sequence.

[0035] In this embodiment, the pre-evacuation chamber has an opening on the top and a cover plate for sealing the opening. The pre-evacuation chamber has an opening on the right side and is connected to the low-temperature heating chamber through the opening, and a partition plate for isolating and sealing the opening is provided at the opening.

[0036] In this embodiment, the low temperature heating chamber is connected to the pre-evacuation chamber on the left side, and is also connected to the high temperature heating chamber on the right side through a corresponding opening, and a partition is provided at the opening for isolating and sealing the opening.

[0037] In this embodiment, the high temperature heating chamber is connected to the low temperature heating chamber on the left side, and is also connected to the welding chamber on the right side through a corresponding opening, and a partition is provided at the opening for isolating and sealing the opening.

[0038] In this embodiment, in addition to the left side of the welding chamber being connected to the high-temperature heating chamber, the right side of the welding chamber is also connected to the cooling chamber through a corresponding opening, and a partition is provided at the opening for isolating and sealing the opening.

[0039] In this embodiment, the cooling chamber is connected to the welding chamber on the left side, and an opening for taking out materials is provided on the top or right side thereof, and a cover plate is provided to cover the opening.

[0040] The specific steps are as follows: S1. A deformation portion 2 is formed at the bottom of the cup body 1 to form an edge 21 between the deformation portion 2 and the cup body 1. The deformation portion 2 at least includes a state of being concave toward the inside of the cup body 1 and a state of being convex toward the outside of the cup body. Part of the edge 21 of the deformation portion 2 is disconnected from the bottom of the cup and a gap 22 is formed. The cup body includes an outer cup body and an inner liner, and a cavity is formed between the outer cup body and the inner liner, which can only be connected to the external fluid through the gap.

[0041] S2. Place several cups upside down in a box, and then place the box in a pre-evacuation chamber. At this time, the pre-evacuation chamber and the low-temperature heating chamber, the low-temperature heating chamber and the high-temperature heating chamber, and the high-temperature heating chamber and the welding chamber are isolated from each other by partitions, and the low-temperature heating chamber, the high-temperature heating chamber and the welding chamber are in a vacuum state (the vacuum operation can be performed in advance, and the specific value of the vacuum degree can refer to the existing design). After covering the pre-evacuation chamber, the pre-evacuation chamber is evacuated. After reaching the set vacuum degree (the specific value of the vacuum degree can refer to the existing design), the partition between the pre-evacuation chamber and the low-temperature heating chamber is opened, the box is transferred to the low-temperature heating chamber and the corresponding partition is closed, and after staying for the set value (such as 10-20 minutes), the partition between the low-temperature heating chamber and the high-temperature heating chamber is opened, and the box is transferred to the high-temperature heating chamber and the corresponding partition is closed. After staying for the set value (such as 10-30 minutes), the partition between the high-temperature heating chamber and the welding chamber is opened, and the box is transferred to the welding chamber and the corresponding partition is closed; S3. The deformation part and / or the cup bottom at the gap are melted by a welding head to seal the exhaust port. The welding head is a laser head or an electron beam welding machine. After the welding is completed, the cooling chamber is evacuated. After reaching the set vacuum degree (the specific value of the vacuum degree can refer to the existing design), the partition between the welding chamber and the cooling chamber is opened, and the box is transferred to the cooling chamber; S4. After closing the partition between the welding chamber and the cooling chamber, take out the box containing the cup body.

[0042] When the welding chamber and the cooling chamber are isolated and closed by a partition and the cover of the cooling chamber is closed, the effect of evacuating the cooling chamber is to prevent external air from entering the welding chamber, the high-temperature heating chamber, and the low-temperature heating chamber. During the cup body transfer process, only the cooling chamber needs to be evacuated to reduce energy consumption.

[0043] The gap 22 formed on the cup body can be one or more places, and the shape of the edge 21 of the deformation part 2 can be specifically selected according to actual needs. As one of the options, the shape of the edge 21 of the deformation part 2 is circular, and the gap 22 is evenly distributed around the edge 21 of the deformation part 2, such as Figure 1 , Figure 2 As shown; as one option, the shape of the edge 21 of the deformation portion 2 is square, and the edge 21 includes a reinforcement portion 23, and the gap 22 is located between two adjacent reinforcement portions 23.

[0044] The deformation part can be arranged at the center of the cup bottom, and it is recessed into the cup body to enhance the anti-deformation effect of the cup body.

[0045] In this embodiment, the width of the gap is 0.1-0.2 mm, the wall thickness of the outer cup body is 0.6-0.9 mm, and the wall thickness of the inner liner is 0.4-0.6 mm.

[0046] In this embodiment, the deformation portion and the gap are formed simultaneously during stamping. Example 4

[0047] See also Figure 1-Figure 4 A vacuum welding process for a thermos cup, the production line involved includes a pre-evacuation chamber, a low-temperature heating chamber, a high-temperature heating chamber, a welding chamber and a cooling chamber which are arranged adjacent to each other in sequence.

[0048] In this embodiment, the pre-evacuation chamber has an opening on the top and a cover plate for sealing the opening. The pre-evacuation chamber has an opening on the right side and is connected to the low-temperature heating chamber through the opening, and a partition plate for isolating and sealing the opening is provided at the opening.

[0049] In this embodiment, the low temperature heating chamber is connected to the pre-evacuation chamber on the left side, and is also connected to the high temperature heating chamber on the right side through a corresponding opening, and a partition is provided at the opening for isolating and sealing the opening.

[0050] In this embodiment, the high temperature heating chamber is connected to the low temperature heating chamber on the left side, and is also connected to the welding chamber on the right side through a corresponding opening, and a partition is provided at the opening for isolating and sealing the opening.

[0051] In this embodiment, in addition to the left side of the welding chamber being connected to the high-temperature heating chamber, the right side of the welding chamber is also connected to the cooling chamber through a corresponding opening, and a partition is provided at the opening for isolating and sealing the opening.

[0052] In this embodiment, the cooling chamber is connected to the welding chamber on the left side, and an opening for taking out materials is provided on the top or right side thereof, and a cover plate is provided to cover the opening.

[0053] The specific steps are as follows: S1. A deformation portion 2 is formed at the bottom of the cup body 1 to form an edge 21 between the deformation portion 2 and the cup body 1. The deformation portion 2 at least includes a state of being concave toward the inside of the cup body 1 and a state of being convex toward the outside of the cup body. Part of the edge 21 of the deformation portion 2 is disconnected from the bottom of the cup and a gap 22 is formed. The cup body includes an outer cup body and an inner liner, and a cavity is formed between the outer cup body and the inner liner, which can only be connected to the external fluid through the gap.

[0054] S2. Place several cups upside down in the box, and then place the box in the pre-evacuation chamber. After covering the pre-evacuation chamber, evacuate the pre-evacuation chamber. After reaching the set vacuum degree (the specific value of the vacuum degree can refer to the existing design), transfer the box to the low-temperature heating chamber, close the low-temperature heating chamber and evacuate to the set vacuum degree (the specific value of the vacuum degree can refer to the existing design). After the box is heated in the low-temperature heating chamber for a set time (such as 10-20 minutes), transfer the box to the high-temperature heating chamber, close the high-temperature heating chamber and evacuate to the set vacuum degree (the specific value of the vacuum degree can refer to the existing design). After the box is heated in the high-temperature heating chamber for a set time (such as 10-30 minutes), transfer the box to the welding chamber, close the welding chamber and evacuate to the set vacuum degree (the specific value of the vacuum degree can refer to the existing design); S3. The deformation part and / or the cup bottom at the gap are melted by a welding head to seal the exhaust port. The welding head is a laser head or an electron beam welding machine. After the welding is completed, the cooling chamber is evacuated. After reaching the set vacuum degree (the specific value of the vacuum degree can refer to the existing design), the partition between the welding chamber and the cooling chamber is opened, and the box is transferred to the cooling chamber; S4. After closing the partition between the welding chamber and the cooling chamber, take out the box containing the cup body.

[0055] When the welding chamber and the cooling chamber are isolated and closed by a partition and the cover of the cooling chamber is closed, the effect of evacuating the cooling chamber is to prevent external air from entering the welding chamber, the high-temperature heating chamber, and the low-temperature heating chamber. During the cup body transfer process, only the cooling chamber needs to be evacuated to reduce energy consumption.

[0056] The gap 22 formed on the cup body can be one or more places, and the shape of the edge 21 of the deformation part 2 can be specifically selected according to actual needs. As one of the options, the shape of the edge 21 of the deformation part 2 is circular, and the gap 22 is evenly distributed around the edge 21 of the deformation part 2, such as Figure 1 , Figure 2 As shown; as one option, the shape of the edge 21 of the deformation portion 2 is square, and the edge 21 includes a reinforcement portion 23, and the gap 22 is located between two adjacent reinforcement portions 23.

[0057] The deformation part can be arranged at the center of the cup bottom, and it is recessed into the cup body to enhance the anti-deformation effect of the cup body.

[0058] In this embodiment, the width of the gap is 0.1-0.2 mm, the wall thickness of the outer cup body is 0.6-0.9 mm, and the wall thickness of the inner liner is 0.4-0.6 mm.

[0059] In this embodiment, the deformation portion and the gap are formed simultaneously during stamping.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum welding process for a thermos cup, characterized in that: The following steps are involved: S1. A deformation portion is formed at the bottom of the cup body, and a portion of the edge of the deformation portion is disconnected from the bottom of the cup to form a gap; S2, placing the cup body upside down in a vacuum container, and evacuating the vacuum container; S3, using a welding head to melt the deformed portion at the gap and / or the cup bottom to close the exhaust port; S4. Take out the cup body.

2. A vacuum welding process for a thermos cup according to claim 1, characterized in that: The cup body comprises an outer cup body and an inner liner, and a cavity which can communicate with an external fluid only through the gap is formed between the outer cup body and the inner liner.

3. A vacuum welding process for a thermos cup according to claim 1 or 2, characterized in that: The edge of the deformation portion is circular in shape, and the gaps are evenly distributed around the circumference.

4. A vacuum welding process for a thermos cup according to claim 1 or 2, characterized in that: The edge of the deformation portion is in a square shape and includes a reinforcement portion at the edge, and the gap is located between two adjacent reinforcement portions.

5. The vacuum welding process for a thermos cup according to claim 1, characterized in that: In step S2, a plurality of cup bodies are placed upside down in a box body, and then the box body is placed in a vacuum container, and then the vacuum container is evacuated.

6. A vacuum welding process for a thermos cup according to claim 1, characterized in that: In step S2 and step S3, several cup bodies are placed upside down in a box body, and then the box body is placed in a pre-evacuation chamber. At this time, the pre-evacuation chamber and the low-temperature heating chamber, the low-temperature heating chamber and the high-temperature heating chamber, and the high-temperature heating chamber and the welding chamber are isolated from each other by partitions, and the low-temperature heating chamber, the high-temperature heating chamber and the welding chamber are in a vacuum state. After covering the pre-evacuation chamber, the pre-evacuation chamber is evacuated. After reaching the set vacuum degree, the partition between the pre-evacuation chamber and the low-temperature heating chamber is opened, and the box body is transferred to the low-temperature heating chamber and the corresponding partition is closed. After staying at the set value, the partition between the low-temperature heating chamber and the high-temperature heating chamber is opened, and the box body is transferred to the high-temperature heating chamber and the corresponding partition is closed. After staying at the set value, the partition between the high-temperature heating chamber and the welding chamber is opened, and the box body is transferred to the welding chamber and the corresponding partition is closed. After welding is completed, the cooling chamber is evacuated. After reaching the set vacuum degree, the partition between the welding chamber and the cooling chamber is opened, and the box body is transferred to the cooling chamber. After closing the corresponding partition, the box body is taken out from the cooling chamber.

7. The vacuum welding process for a thermos cup according to claim 1, characterized in that: In step S2, several cups are placed upside down in a box, and then the box is placed in a pre-vacuum chamber. After the pre-vacuum chamber is covered, the pre-vacuum chamber is evacuated. After reaching the set vacuum degree, the box is transferred to the low-temperature heating chamber. The low-temperature heating chamber is evacuated to the set vacuum degree. After the box is heated in the low-temperature heating chamber for a set time, the box is transferred to the high-temperature heating chamber. The high-temperature heating chamber is evacuated to the set vacuum degree. After the box is heated in the high-temperature heating chamber for a set time, the box is transferred to the welding chamber. After the welding chamber is evacuated to the set vacuum degree, the welding operation of step S3 is performed.

8. A vacuum welding process for a thermos cup according to any one of claims 1 or 5-7, characterized in that: In step S3, the welding head is a laser head or an electron beam welding machine.

9. The vacuum welding process for a thermos cup according to claim 1, characterized in that: The width of the gap is 0.1-0.2 mm.

10. The vacuum welding process for a thermos cup according to claim 1, characterized in that: The deformation portion and the gap are formed simultaneously during stamping.

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