A sealing structure and reflow soldering furnace

Abstract

The utility model relates to reflow soldering furnace body sealing technical field, concretely relates to a sealing structure and reflow soldering furnace, including the inner sealing component and outer sealing component of strip shape, the inner sealing component is side by side and located the one side of outer sealing component, the outer sealing component includes the concave sealing strip of being located on the both sides of lower hearth and the convex sealing strip of being located on the both sides of upper hearth, the concave sealing strip includes the concave support part and the concave contact part of being located on the concave support part, the convex sealing strip includes the convex support part and the convex contact part of being located on the convex support part, the concave contact part and convex contact part close contact cooperation. Adopt double -layer sealing structure, through the inner sealing component and outer sealing component bear the weight of upper hearth together and carry out high -efficient sealing to the protective gas in the stove, while the inner sealing component can effectively block and reduce the heat escape in the stove, and further delay the aging speed of outer sealing component, improve the service life and sealing performance of sealing structure.

Description

Technical Field

[0001] The utility model relates to the technical field of the sealing of a reflow soldering furnace body, and particularly relates to a sealing structure and a reflow soldering furnace. Background Art

[0002] At present, a reflow soldering furnace is often used to implement the surface soldering process of a printed circuit board (PCB); during the soldering process of the printed circuit board (PCB), some areas in the reflow soldering furnace need to maintain a relatively high temperature, and the reflow soldering furnace usually needs to be filled with an inert gas as a protective gas; in order to ensure the heating temperature in the reflow soldering furnace and prevent the inert gas from escaping from the reflow soldering furnace, a sealing strip is often provided between the upper furnace chamber and the lower furnace chamber of the reflow soldering furnace.

[0003] The upper and lower furnace chambers of the existing reflow soldering furnace are sealed by a single sealing strip, and the sealing strip needs to bear the weight of the upper furnace chamber and the high temperature in the reflow soldering furnace, so it is easy to age, resulting in a poor sealing effect of this sealing method.

[0004] Therefore, the applicant hereby proposes a sealing structure and a reflow soldering furnace to solve the above problems. Summary of the Utility Model

[0005] To solve the deficiencies of the existing technology, the utility model provides a sealing structure and a reflow soldering furnace.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a sealing structure for sealing between the upper furnace chamber and the lower furnace chamber of a reflow soldering furnace, including a long strip-shaped inner sealing component and an outer sealing component; the inner sealing component is arranged side by side on one side of the outer sealing component, and the outer sealing component includes a concave sealing strip arranged on both sides of the lower furnace chamber and a convex sealing strip arranged on both sides of the upper furnace chamber;

[0008] The concave sealing strip includes a concave supporting part and a concave contact part arranged on the concave supporting part;

[0009] The convex sealing strip includes a convex supporting part and a convex contact part arranged on the convex supporting part;

[0010] The concave contact part and the convex contact part are in a closed contact fit.

[0011] Further, the inner sealing component includes a long strip-shaped limiting plate arranged on the lower furnace chamber and a sealing member arranged inside the limiting plate, and the top of the sealing member can be in close contact fit with the corresponding bottom surface of the upper furnace chamber.

[0012] Further, the cross-section of the limiting plate is in a U shape.

[0013] Furthermore, both the concave and convex contact portions have hollow interiors.

[0014] Furthermore, both the concave and convex contact portions have buffer through holes along their length.

[0015] Furthermore, both the concave and convex contact portions have a rounded transition on their outer surfaces.

[0016] Furthermore, both the concave and convex sealing strips are made of elastic material.

[0017] This utility model also provides a reflow oven, including an upper furnace chamber, a lower furnace chamber, and the aforementioned sealing structure. The upper and lower furnace chambers are arranged opposite to each other, and a sealing structure is detachably provided between the two sides of the upper and lower furnace chambers along their length direction, and the sealing structures on both sides are symmetrically arranged.

[0018] The beneficial effects achieved by this utility model are as follows:

[0019] The present invention provides a sealing structure and reflow oven, which adopts a double-layer sealing structure. The inner sealing component and the outer sealing component jointly bear the weight of the upper furnace chamber and efficiently seal the protective gas in the furnace. At the same time, the inner sealing component can effectively block and reduce the heat loss from the furnace, thereby slowing down the aging rate of the outer sealing component and improving the service life and sealing performance of the sealing structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation of the sealing structure of this utility model with a reflow oven.

[0021] Figure 2 yes Figure 1 Enlarged image.

[0022] Figure 3 This is a three-dimensional schematic diagram of the sealed structure.

[0023] Figure 4 This is a cross-sectional view of the sealing structure. Detailed Implementation

[0024] To facilitate understanding of this utility model by those skilled in the art, the specific embodiments of this utility model are clearly described below with reference to the accompanying drawings. Obviously, the specific embodiments described are merely preferred embodiments of this utility model, and not all embodiments.

[0025] like Figure 1-4As shown, the present invention provides a sealing structure for improving the sealing performance between the upper furnace chamber 101 and the lower furnace chamber 102 of a reflow oven 100, and preventing the protective gas inside the reflow oven 100 from leaking out; it includes a strip-shaped inner sealing component 1 and an outer sealing component 2; the inner sealing component 1 is arranged side by side on one side of the outer sealing component 2, and the outer sealing component 2 includes a concave sealing strip 21 on both sides of the lower furnace chamber 102 and a convex sealing strip 22 on both sides of the upper furnace chamber 101;

[0026] The concave sealing strip 21 includes a concave support portion 211 and a concave contact portion 212 disposed on the concave support portion 211;

[0027] The convex sealing strip 22 includes a convex support portion 221 and a convex contact portion 222 disposed on the convex support portion 221;

[0028] The concave contact portion 212 and the convex contact portion 222 are in closed contact and fit together; a double-layer sealing structure is adopted, in which the inner sealing component and the outer sealing component jointly bear the weight of the upper furnace and efficiently seal the protective gas in the furnace. At the same time, the inner sealing component can effectively block and reduce the heat loss from the furnace, thereby slowing down the aging rate of the outer sealing component and improving the service life and sealing performance of the sealing structure.

[0029] The inner sealing assembly 1 includes a long strip-shaped limiting plate 11 disposed on the lower furnace chamber 102 and a detachable sealing element 12 disposed within the limiting plate 11. The limiting plate 11 has a U-shaped cross-section, and the top of the sealing element 12 can be in close contact with the corresponding bottom surface of the upper furnace chamber 101. In this embodiment, the sealing element 12 is preferably made of oil-free packing, such as polytetrafluoroethylene packing, etc., to prevent the leakage of protective gas in the reflow oven and to a certain extent block and reduce the rate of heat loss from the furnace.

[0030] Both the concave sealing strip 21 and the convex sealing strip 22 are made of elastic material, preferably plastic in this example; both the concave contact portion 212 and the convex contact portion 222 have hollow structures inside; specifically, both the concave contact portion 212 and the convex contact portion 222 have buffer through holes 23 along their length direction; the hollow structure allows the concave contact portion 212 and the convex contact portion 222 to undergo significant deformation under pressure, which is beneficial for the concave sealing strip and the convex sealing strip to tightly bond with each other, thereby achieving a seal between the upper furnace chamber 101 and the lower furnace chamber 102 and improving the sealing effect.

[0031] Both the concave contact portion 212 and the convex contact portion 222 have rounded transitions on their outer surfaces, thus guiding the concave and convex contact portions to make correct and tight closed contact.

[0032] like Figure 1-4As shown, this utility model also provides a reflow oven, including an upper furnace chamber 101, a lower furnace chamber 102 and the above-mentioned sealing structure. The upper furnace chamber 101 and the lower furnace chamber 102 are arranged opposite to each other. A sealing structure is detachably provided between the two sides of the upper furnace chamber 101 and the lower furnace chamber 102 along their length direction, and the sealing structures on both sides are symmetrically arranged. Specifically, the concave sealing strip 21 and convex sealing strip 22 in the outer sealing assembly 2 are detachably mounted on the same side contact surface of the lower furnace chamber 102 and the upper furnace chamber 101, respectively. The inner sealing assembly 1 is detachably mounted on the lower furnace chamber 102 and located inside the outer sealing assembly 1. When the upper furnace chamber 101 and the lower furnace chamber 102 are closed to seal them, the weight of the upper furnace chamber is jointly borne by the inner sealing assembly 1 and the outer sealing assembly 2 arranged side by side on both sides. The concave sealing strip 21 and convex sealing strip 22 in the outer sealing assembly 2 are tightly closed and in contact, so that a five-point closed contact is formed between the upper furnace chamber and the lower furnace chamber, which improves the sealing performance of the protective gas in the furnace and effectively blocks and reduces the rate of temperature escape from the furnace.

[0033] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A sealing structure for sealing between the upper furnace chamber (101) and the lower furnace chamber (102) of a reflow oven (100), characterized in that: It includes a strip-shaped inner sealing component (1) and an outer sealing component (2); the inner sealing component (1) is arranged side by side on one side of the outer sealing component (2), and the outer sealing component (2) includes concave sealing strips (21) provided on both sides of the lower furnace chamber (102) and convex sealing strips (22) provided on both sides of the upper furnace chamber (101); The concave sealing strip (21) includes a concave support portion (211) and a concave contact portion (212) provided on the concave support portion (211); The convex sealing strip (22) includes a convex support portion (221) and a convex contact portion (222) provided on the convex support portion (221); The concave contact portion (212) and the convex contact portion (222) are in closed contact and fit; 2. The sealing structure according to claim 1, characterized in that: The inner sealing component (1) includes a strip-shaped limit plate (11) provided on the lower furnace chamber (102) and a sealing member (12) provided inside the limit plate (11), and the top of the sealing member (12) can be in close contact and fit with the corresponding bottom surface of the upper furnace chamber (101); 3. The sealing structure according to claim 2, characterized in that: The cross-section of the limit plate (11) is in a U-shape; 4. A sealing structure according to any one of claims 1-3, characterized in that: Both the concave contact portion (212) and the convex contact portion (222) have a hollow structure inside; 5. A sealing structure according to claim 4, characterized in that: Buffer through holes (23) are provided along the length direction inside both the concave contact portion (212) and the convex contact portion (222); 6. A sealing structure according to claim 1, characterized in that: There are arc transitions on the outer surfaces of both the concave contact portion (212) and the convex contact portion (222); 7. A sealing structure according to claim 1, characterized in that: Both the concave sealing strip (21) and the convex sealing strip (22) are made of elastic materials; 8. A reflow oven, characterized in that: It includes an upper furnace chamber (101), a lower furnace chamber (102) and the sealing structure according to any one of claims 1-7, the upper furnace chamber (101) and the lower furnace chamber (102) are arranged opposite to each other, and the sealing structures are detachably provided along the length direction between both sides of the upper furnace chamber (101) and the lower furnace chamber (102), and the sealing structures on both sides are symmetrically arranged with each other.

Images