Curing oven sealing device

Abstract

The utility model belongs to the technical field of curing oven equipment, and particularly relates to a curing oven sealing device which comprises a lifting mechanism and a sealing pressing mechanism, the lifting mechanism is arranged on the outer side wall of a curing oven, and the sealing pressing mechanism comprises a sealing plate and two limiting pressing pieces. The limiting pressing pieces are symmetrically arranged on the two sides close to a material conveying opening of the curing oven, the sealing plate is arranged on the lifting mechanism, sealing plate clamping pieces connected with the limiting pressing pieces in a clamped mode are arranged at the two ends of the sealing plate, and the lifting mechanism drives the sealing plate to move, so that the sealing plate clamping pieces are connected with the limiting pressing pieces in a clamped mode, and the sealing plate is pressed on the material conveying opening. According to the device, the sealing plate is moved to the material conveying opening of the curing oven through the lifting mechanism, and the sealing plate clamping pieces on the two sides of the sealing plate are clamped and pressed through the limiting pressing pieces, so that the material conveying opening is effectively sealed, the nitrogen usage amount in the high-temperature curing process is reduced, energy is saved, consumption is reduced, the production cost is reduced, meanwhile, the oxygen content in the curing oven is effectively controlled, and the curing efficiency is improved. And the product performance stability is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the solidification furnace equipment technical field, and especially relates to a solidification furnace sealing device. BACKGROUND

[0002] SMD is surface mounted component, through directly mounting electronic component on circuit board, realizes high density assembly, significantly reduces the volume and quality of product. In the production stage, production personnel need to fix electronic component on circuit board after dispensing, then are transported to solidification furnace and are carried out high temperature solidification. But traditional solidification furnace is the closed space of both ends open, solidification furnace is equipped with chain type conveyer, and SMD is transported to next process after completing solidification in solidification furnace. SMD is solidified, and silver layer on the surface of electronic component is easy to carry out oxidation reaction with oxygen in solidification furnace under high temperature, leads to unstable product performance, influences product quality, and in order to reduce this kind of situation, currently, mainly through the nitrogen gas that is inhaled to solidification furnace to control the oxygen content in solidification furnace, to reduce the situation of oxygen content exceeding the standard, but because solidification furnace is open, part nitrogen gas will diffuse out through the material delivery port of solidification furnace, which undoubtedly increases the production cost of SMD, and the oxygen content in solidification furnace is not easy to effectively control in an ideal range, leading to unstable product performance.

[0003] Therefore, it is urgent to design a sealing device capable of effectively closing the material delivery port of the solidification furnace to solve the above problems. INVENTION CONTENTS

[0004] In order to overcome the problems in the background art, the utility model provides a solidification furnace sealing device, which comprises a lifting mechanism and a sealing and pressing mechanism. The lifting mechanism is arranged on the outer side wall of the solidification furnace. The sealing and pressing mechanism comprises a sealing plate and two limiting and pressing members. The limiting and pressing members are symmetrically arranged on both sides of the material delivery port of the solidification furnace. The sealing plate is arranged on the lifting mechanism. Both ends of the sealing plate are provided with sealing plate clamping members which are clamped with the limiting and pressing members. The lifting mechanism drives the sealing plate to move, so that the sealing plate clamping members are clamped with the limiting and pressing members, and the sealing plate is tightly sealed on the material delivery port.

[0005] Further, the sealing and pressing mechanism further comprises an elastic pressing assembly and a sealing ring. One end of the elastic pressing assembly is fixedly connected with the lifting mechanism. The other end of the elastic pressing assembly is connected with the outer side surface of the sealing plate. The sealing ring is fixed on the inner side surface of the sealing plate.

[0006] Further, the elastic pressing assembly comprises an L-shaped connecting plate, a guide column and a reset elastic member. The horizontal plate of the L-shaped connecting plate is fixedly connected with the lifting mechanism. The guide column passes through the vertical plate of the L-shaped connecting plate and is fixedly connected with the sealing plate. The reset elastic member is sleeved on the guide column and located between the L-shaped connecting plate and the end of the guide column. The L-shaped connecting plate slides under the action of the reset elastic member.

[0007] Further, the limiting and pressing part comprises a fixing part, a connecting part and a limiting part which are integrally formed, the fixing part is fixedly connected with the outer side wall of the curing furnace, the connecting part is vertically connected with the fixing part, the limiting part is vertically connected with the connecting part, and the inner side surface of the limiting part is a slope surface which inclines outward from top to bottom.

[0008] Further, the sealing plate clamping part comprises a sealing plate fixing part, the sealing plate fixing part is fixedly connected with the sealing plate, and a rolling part is arranged on the outer side surface of the sealing plate fixing part, and when the lifting mechanism drives the sealing plate to move up and down, the rolling part slides in abutment with the slope surface.

[0009] Further, the rolling part is a metal bearing.

[0010] Further, the lifting mechanism comprises a cylinder fixing part and a lifting cylinder, the cylinder fixing part is fixedly connected with the outer side wall of the curing furnace, the lifting cylinder is fixedly installed on the cylinder fixing part, and the piston rod of the lifting cylinder is fixedly connected with the horizontal plate of the L-shaped connecting plate.

[0011] Further, the lifting mechanism further comprises a guide sliding block, the guide sliding block is slidably connected to the side surface of the lifting cylinder, the top end of the guide sliding block is provided with a cylinder connecting part, the lower end surface of the cylinder connecting part is connected with the piston rod of the lifting cylinder, and the upper end surface of the cylinder connecting part is fixedly connected with the horizontal plate of the L-shaped connecting plate.

[0012] Further, the lifting mechanism further comprises a sensor switch for controlling the lifting cylinder to move up and down, and the sensor switch is fixed on the lifting cylinder.

[0013] Compared with the prior art, the sealing device of the curing furnace has the following beneficial effects:

[0014] (1) The sealing plate is moved to the material conveying port of the curing furnace through the lifting mechanism, and the sealing plate clamping parts on both sides of the sealing plate are clamped and pressed through the limiting and pressing part, so that the material conveying port of the curing furnace is effectively sealed, the use amount of nitrogen in the high-temperature curing process is reduced, energy consumption is saved, the production cost of SMD is reduced, and the oxygen content in the curing furnace can be effectively controlled, thereby ensuring the product performance stability.

[0015] (2) The rolling parts on both sides of the sealing plate slide in abutment with the slope surface of the limiting and pressing part through the sliding of the L-shaped connecting plate on the guide column, and then the sealing plate is sealed and pressed on the material conveying port of the curing furnace, so that the sealing performance of the inlet and outlet of the curing furnace is ensured, the structure is simple, the control is convenient, and the design is ingenious. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the sealing device of this utility model installed on the unsealed material conveying port of the curing oven;

[0018] Figure 2 This is a schematic diagram of the sealing device of this utility model installed on a curing oven to seal the material conveying port;

[0019] Figure 3 This is a schematic diagram of the overall structure of the sealing device of this utility model;

[0020] Figure 4 In the sealing device of this utility model Figure 1 A side sectional view of the structure;

[0021] Figure 5 In the sealing device of this utility model Figure 2 A side sectional view of the structure;

[0022] Figure 6 This is a schematic diagram of the limiting and clamping component in the sealing device of this utility model;

[0023] Wherein: 1-Lifting mechanism, 11-Cylinder fixing component, 12-Lifting cylinder, 120-Piston rod, 13-Guide slider, 14-Sensor switch, 15-Cylinder connector, 2-Sealing and pressing mechanism, 21-Sealing plate, 22-Limiting and clamping component, 220-Fixing part, 221-Connecting part, 222-Limiting part, 2220-Slope surface, 23-Sealing plate clamping component, 230-Sealing plate fixing component, 231-Rolling component, 24-Elastic pressing assembly, 240-L-shaped connecting plate, 241-Guide column, 242-Reset elastic component, 25-Sealing ring, 3-Curing oven, 31-Material conveying port. Detailed Implementation

[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The following is combined with Figures 1 to 6And the specific embodiment discusses the utility model in detail.

[0026] The utility model provides a solidification furnace sealing device, including elevating system 1 and sealing and pressing mechanism 2, elevating system 1 sets up on the outside wall of solidification furnace 3, wherein: sealing and pressing mechanism 2 includes sealing plate 21 and two limit and pressing parts 22, limit and pressing part 22 symmetry sets up near the material conveying mouth 31 both sides of solidification furnace 3, sealing plate 21 sets up on elevating system 1, and the both ends of sealing plate 21 are equipped with the sealing plate clamping piece 23 of limit and pressing part 22 clamping, elevating system 1 moves with sealing plate 21, makes sealing plate clamping piece 23 with limit and pressing part 22 clamping, sealing plate 21 is sealed and pressed on material conveying mouth 31.

[0027] In the utility model, the number of sealing devices is adapted to the number of material conveying mouths 31 on the solidification furnace 3, and a person skilled in the art can set multiple material conveying mouths 31 and sealing devices according to actual production needs, wherein the material conveying mouths 31 are divided into feeding ports and discharge ports and are symmetrically arranged on the two side walls of the solidification furnace 3. In the embodiment, the material conveying mouths 31 are two, one sealing device is arranged on each of the feeding port and the discharge port, and a nitrogen gas transmission pipeline is arranged on the outer side wall of the solidification furnace 3. Nitrogen gas is input into the solidification furnace 3 through the nitrogen gas transmission pipeline, and an oxygen content analyzer and a regulating valve are further arranged on the solidification furnace 3 to monitor and control the oxygen content in the solidification furnace 3. In the embodiment, the sealing plate 21 is a rectangular metal plate capable of completely covering and pressing the material conveying mouth 31, and the elevating system 1, the sealing plate 21, and the sealing plate clamping piece 23 are all arranged below the material conveying mouth 31. In the initial state, the feeding port and the discharge port are both closed by the sealing devices. When the SMD after dispensing reaches the feeding port of the solidification furnace 3, the elevating system 1 drives the sealing plate 21 to move downward, the sealing plate clamping pieces 23 at the two ends of the sealing plate 21 are disengaged from the clamping of the limit and pressing parts 22, the feeding port is opened, and after the SMD enters the chain type conveying belt in the solidification furnace 3, the elevating system 1 drives the sealing plate 21 to move upward to the feeding port and clamps and presses the sealing plate clamping pieces 23 on the two sides of the sealing plate 21 through the limit and pressing parts 22, thereby achieving effective sealing of the feeding port on the solidification furnace 3. After the SMD in the solidification furnace 3 is solidified, the discharge port is opened, the SMD is conveyed out of the discharge port, and the discharge port is again closed by the sealing device. During the high-temperature solidification process, the nitrogen gas input into the solidification furnace 3 cannot diffuse out through the material conveying mouth 31 of the solidification furnace, thereby reducing the amount of nitrogen gas used during the high-temperature solidification process, saving energy and reducing consumption, reducing the production cost of the SMD, and effectively controlling the oxygen content in the solidification furnace 3, so that the oxygen content in the solidification furnace 3 is maintained within an ideal range, thereby ensuring the stability of product performance.

[0028] Specifically, referring to Figures 1-5The sealing and pressing mechanism 2 in the embodiment further comprises an elastic pressing assembly 24 and a sealing ring 25. One end of the elastic pressing assembly 24 is fixedly connected with the lifting mechanism 1, the other end of the elastic pressing assembly 24 is connected with the outer side of the sealing plate 21, and the sealing ring 25 is fixed on the inner side of the sealing plate 21. The sealing ring 25 in the embodiment is a rubber rectangular ring, and the sealing effect of the sealing plate 21 on the material conveying port 31 is further improved by arranging the sealing ring 25.

[0029] Specifically, referring to Figures 1-5 The elastic pressing assembly 24 in the embodiment comprises an L-shaped connecting plate 240, a guide column 241 and a reset elastic member 242. The horizontal plate of the L-shaped connecting plate 240 is fixedly connected with the lifting mechanism 1, the guide column 241 passes through the vertical plate of the L-shaped connecting plate 240 and is fixedly connected with the sealing plate 21, the reset elastic member 242 is sleeved on the guide column 241 and located between the L-shaped connecting plate 240 and the end of the guide column 241, and the L-shaped connecting plate 240 slides under the action of the reset elastic member 242. In the embodiment, the reset elastic member 242 is preferably a cylindrical coil spring which has simple structure and stable rigidity.

[0030] Specifically, referring to Figures 1-6 The limiting and pressing member 22 in the embodiment comprises an integrally formed fixed part 220, a connecting part 221 and a limiting part 222. The fixed part 220 is fixedly connected with the outer side wall of the curing furnace 3, the connecting part 221 is perpendicularly connected with the fixed part 220, and the limiting part 222 is perpendicularly connected with the connecting part 221. The inner side of the limiting part 222 is a slope surface 2220 which inclines outward from top to bottom.

[0031] Specifically, referring to Figures 1-6 The sealing plate clamping member 23 in the embodiment comprises a sealing plate fixing member 230 which is fixedly connected with the sealing plate 21. The outer side of the sealing plate fixing member 230 is provided with a rolling member 231. When the lifting mechanism 1 drives the sealing plate 21 to move up and down, the rolling member 231 slides in abutment with the slope surface 2220.

[0032] Specifically, referring to Figure 1 、 Figure 2 、 Figure 4 and Figure 5When the material conveying port 31 is in the open state, the sealing plate 21 with the sealing ring 25 is not in contact with the outer side wall of the curing furnace 3, and the reset elastic member 242 is in a natural state; with the lifting mechanism 1 driving the L-shaped connecting plate 240 to move upwards, the rolling member 231 is in abutment with the limiting portion 222 and slides inwards along the inclined surface 2220, thereby driving the sealing plate 21 to move towards the outer side wall of the curing furnace 3; at the same time, the guide column 241 arranged on the sealing plate 21 also moves towards the outer side wall of the curing furnace 3; since the L-shaped connecting plate 240 is not moved in the horizontal direction, the reset elastic member 242 between the L-shaped connecting plate 240 and the end of the guide column 241 is compressed; when the lifting mechanism 1 stops moving upwards, the top surface of the rolling member 231 is in abutment with the lower end surface of the connecting portion 221, and the sealing plate 21 with the sealing ring 25 is sealed and pressed on the material conveying port 31, so that the sealing operation of the material conveying port 31 of the curing furnace is realized; when the material conveying port 31 needs to be opened again, the lifting mechanism 1 drives the L-shaped connecting plate 240 to move downwards; at this time, the rolling member 231 is in abutment with the limiting portion 222 and slides outwards along the inclined surface 2220, and the sealing plate 21 moves away from the outer side wall of the curing furnace 3; at the same time, the guide column 241 arranged on the sealing plate 21 also moves away from the outer side wall of the curing furnace 3, and the reset elastic member 242 is reset from the compressed state to the natural state, thereby driving the sealing plate 21 to move away from the curing furnace 3 and away from the contact with the outer wall of the material conveying port 31, so that the sealing strip 25 is prevented from being abraded. Through the sliding of the L-shaped connecting plate 240 on the guide column 241, the rolling member 231 on both sides of the sealing plate 21 is in abutment and slides with the inclined surface 2220 of the limiting and pressing member 22, thereby sealing and pressing the sealing plate 21 on the material conveying port 31, so that the sealing performance of the material conveying port 31 is ensured, the structure is simple, control is facilitated, and the design is ingenious.

[0033] Specifically, referring to Figures 1-6 In the embodiment, the rolling member 231 is a metal bearing. On the one hand, the metal bearing can reduce the friction coefficient of the rolling member 231 and the inclined surface 2220, so that the lifting of the sealing plate 21 is smoother; on the other hand, the metal bearing will not generate debris when sliding with the inclined surface 2220, so that the product performance is prevented from being affected due to the debris falling on the SMD, and the requirement of the SMD product for the clean production environment is met.

[0034] Specifically, referring to Figures 1-5 The specific structure of the lifting mechanism 1 is not limited in the application, as long as the lifting structure of the sealing and pressing mechanism 2 belongs to the protection range of the application. In an alternative embodiment, the lifting mechanism 1 comprises a cylinder fixing member 11 and a lifting cylinder 12; the cylinder fixing member 11 is fixedly connected with the outer side wall of the curing furnace 3; the lifting cylinder 12 is fixedly installed on the cylinder fixing member 11; and the piston rod 120 of the lifting cylinder 12 is fixedly connected with the horizontal plate of the L-shaped connecting plate 240.

[0035] Specifically, referring to Figures 1-5 The lifting mechanism 1 further comprises a guide sliding block 13 which is slidingly connected to the side of the lifting cylinder 12. The top end of the guide sliding block 13 is provided with a cylinder connecting piece 15. The lower end surface of the cylinder connecting piece 15 is connected to the piston rod 120 of the lifting cylinder 12, and the upper end surface of the cylinder connecting piece 15 is fixedly connected to the horizontal plate of the L-shaped connecting plate 240. In this embodiment, the cylinder fixing piece 11 is a rectangular metal fixing piece which is fixedly connected to the outer side wall of the curing furnace 3 by means of bolts. The lifting cylinder 12 is provided with a groove, and the guide sliding block 13 is provided with a guide rail which is matched with the groove. The lifting cylinder 12 drives the guide sliding block 13 to move up and down along the groove, thereby driving the L-shaped connecting plate 240 to slide up and down, so as to realize the smooth sliding of the sealing plate 21 up and down, and make the whole sealing device run more stably and reliably.

[0036] Specifically, referring to Figures 1-5 In this embodiment, the lifting mechanism 1 further comprises a sensor switch 14 which controls the lifting cylinder 12 to move up and down. The sensor switch 14 is fixedly connected to the lifting cylinder 12. Preferably, the sensor switch 14 is a magnetic induction switch. The sensor switch 14 is connected to an electrical control assembly (not shown in the figure). The electrical control assembly accurately controls the lifting distance of the lifting cylinder 12 through the sensor switch 14, and is sensitive, reliable, has a long service life and low production cost.

[0037] The working principle of the sealing device of the curing furnace is as follows:

[0038] (1) In the initial state, the inlet and outlet of the curing furnace 3 are in a closed state. When the SMD is sent into the curing furnace 3, the sensor switch 14 controls the lifting cylinder 12 to move downward, thereby driving the sealing plate 21 to move downward. At the same time, the rolling elements 231 on both sides of the sealing plate 21 abut against the limiting portions 222 and slide outward along the inclined surfaces 2220, so that the sealing plate 21 moves away from the outer side wall of the curing furnace 3, and the inlet is opened.

[0039] (2) After the SMD is sent into the curing furnace 3, the sensor switch 14 controls the lifting cylinder 12 to move upward, thereby driving the sealing plate 21 to move upward. When the sealing plate 21 moves to a certain distance, the rolling elements 231 on both sides of the sealing plate 21 abut against the limiting portions 220 and slide inward along the inclined surfaces 2220, so that the sealing plate 21 is tightly sealed on the inlet of the curing furnace 3, and the high-temperature curing of the SMD in the curing furnace is started.

[0040] (3) When the SMD curing is completed, the SMD is sent to the discharge port of the curing furnace 3 by the conveying belt, the sensor switch 14 controls the lifting cylinder 12 to move downward, at this time the rolling elements 231 on both sides of the sealing plate 21 abut against the limiting portions 220 and slide outward from the inside along the inclined surfaces 2220, the sealing plate 21 is away from the outer side wall of the curing furnace 3, the discharge port is opened, and the cured SMD is taken out through the discharge port;

[0041] (4) When the SMD is taken out, the sensor switch 14 controls the lifting cylinder 12 to move upward, and drives the sealing plate 21 to move upward, after moving to a certain distance, the rolling elements 231 on both sides of the sealing plate 21 abut against the limiting portions 220 and slide inward from the outside along the inclined surfaces 2220, so that the sealing plate 21 is tightly sealed on the discharge port of the curing furnace 3, and thus the high-temperature curing process of the SMD in the curing furnace 3 is completed.

[0042] The above operation is repeated, so that the batch curing of the SMD can be realized.

[0043] The above is further described by means of specific embodiments, but it should be understood that the specific description herein should not be understood as limiting the essence and scope of the utility model, and various modifications made by those skilled in the art after reading the above description also belong to the scope of protection of the utility model.

Claims

1. A curing oven sealing device, characterized by, The sealing and pressing mechanism comprises a sealing plate and two limiting and pressing members, the limiting and pressing members are symmetrically arranged near the material conveying port of the curing furnace, the sealing plate is arranged on the lifting mechanism, both ends of the sealing plate are provided with sealing plate clamping members clamped with the limiting and pressing members, the lifting mechanism drives the sealing plate to move, the sealing plate clamping members are clamped with the limiting and pressing members, and the sealing plate is sealed and pressed on the material conveying port. The sealing and pressing mechanism further comprises an elastic pressing assembly and a sealing ring, one end of the elastic pressing assembly is fixedly connected with the lifting mechanism, the other end of the elastic pressing assembly is connected with the outer side surface of the sealing plate, and the sealing ring is fixed on the inner side surface of the sealing plate.

2. The curing oven seal apparatus of claim 1, wherein, The elastic pressing assembly comprises an L-shaped connecting plate, a guide column and a reset elastic member, the horizontal plate of the L-shaped connecting plate is fixedly connected with the lifting mechanism, the guide column passes through the vertical plate of the L-shaped connecting plate and is fixedly connected with the sealing plate, the reset elastic member is sleeved on the guide column and located between the L-shaped connecting plate and the end of the guide column, and the L-shaped connecting plate slides under the action of the reset elastic member.

3. The curing oven seal apparatus of claim 2, wherein, The limiting and pressing member comprises an integral forming fixed part, a connecting part and a limiting part, the fixed part is fixedly connected with the outer side wall of the curing furnace, the connecting part is perpendicularly connected with the fixed part, the limiting part is perpendicularly connected with the connecting part, and the inner side surface of the limiting part is a slope surface inclined outward from top to bottom.

4. The curing oven seal apparatus of claim 3, wherein, The sealing plate clamping member comprises a sealing plate fixing member, the sealing plate fixing member is fixedly connected with the sealing plate, and the outer side surface of the sealing plate fixing member is provided with a rolling member, the rolling member slides in abutment with the slope surface when the lifting mechanism drives the sealing plate to move up and down.

5. The curing oven seal of claim 4, wherein, The rolling member is a metal bearing.

6. The curing oven seal apparatus of claim 5, wherein, The lifting mechanism comprises a cylinder fixing member and a lifting cylinder, the cylinder fixing member is fixedly connected with the outer side wall of the curing furnace, the lifting cylinder is fixedly installed on the cylinder fixing member, and the piston rod of the lifting cylinder is fixedly connected with the horizontal plate of the L-shaped connecting plate.

7. The curing oven seal of claim 3, wherein, The lifting mechanism further comprises a guide sliding block, the guide sliding block is slidingly connected to the side surface of the lifting cylinder, the top end of the guide sliding block is provided with a cylinder connecting member, the lower end surface of the cylinder connecting member is connected with the piston rod of the lifting cylinder, and the upper end surface of the cylinder connecting member is fixedly connected with the horizontal plate of the L-shaped connecting plate.

8. The curing oven sealing apparatus of claim 7, wherein, The lifting mechanism further comprises a sensor switch for controlling the lifting cylinder to move up and down, and the sensor switch is fixed on the lifting cylinder.

9. The curing oven seal of claim 7, wherein, ​

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