CN114347492A - Manufacturing method of heat shield for reflow soldering machine and heat shield manufactured by same - Google Patents
Manufacturing method of heat shield for reflow soldering machine and heat shield manufactured by same Download PDFInfo
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- CN114347492A CN114347492A CN202210061449.3A CN202210061449A CN114347492A CN 114347492 A CN114347492 A CN 114347492A CN 202210061449 A CN202210061449 A CN 202210061449A CN 114347492 A CN114347492 A CN 114347492A
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- heat shield
- heat insulation
- layer leather
- leather
- reflow soldering
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- 238000005476 soldering Methods 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000010985 leather Substances 0.000 claims abstract description 73
- 238000009413 insulation Methods 0.000 claims abstract description 53
- 229920000742 Cotton Polymers 0.000 claims abstract description 34
- 238000005520 cutting process Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000009958 sewing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 37
- 239000004744 fabric Substances 0.000 claims description 16
- 239000003365 glass fiber Substances 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000000741 silica gel Substances 0.000 claims description 13
- 229910002027 silica gel Inorganic materials 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims description 6
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims description 6
- 238000003490 calendering Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000004595 color masterbatch Substances 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 239000012856 weighed raw material Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract description 7
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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Abstract
The invention relates to the field of heat insulation protection of welding equipment, in particular to a method for manufacturing a heat insulation cover for a reflow soldering machine and the heat insulation cover manufactured by the same, wherein the manufacturing method comprises the following steps: step a, dimension measurement and drawing; step b, processing outer-layer leather; c, cutting and sewing the outer leather; d, cutting and placing the inner layer heat insulation cotton; step e, sewing the bag opening; and f, installing the heat shield. The heat shield manufactured by the manufacturing method has the advantages that the heat insulation cotton is filled into the bag sewn by the outer-layer leather, dust in the heat insulation cotton can be prevented from polluting a dust-free workshop, the heat insulation efficiency of the heat shield is greatly improved, the heating time and the energy consumption cost of the reflow welding machine are effectively reduced, the heat emission amount in the environment is effectively reduced, the temperature of the workshop is reduced, and the refrigeration energy consumption cost of the workshop is saved.
Description
Technical Field
The invention relates to the field of heat insulation protection of welding equipment, in particular to a method for manufacturing a heat insulation cover for a reflow soldering machine and the heat insulation cover manufactured by the method.
Background
At present, printed circuit board's welding mainly adopts reflow soldering machine to go on, because reflow soldering machine's heating mechanism includes heating-up area, the heat preservation district, a plurality of regions such as cooling space, consequently reflow soldering machine's is bulky, and in the use, reflow soldering machine's shell temperature can reach 55 ~ 60 degrees centigrade, consequently, reflow soldering machine's use causes a large amount of heats to give off in the environment, not only cause reflow soldering machine thermal loss, reflow soldering machine's heating time and energy consumption cost have been increased, still greatly influence the workshop temperature, cause refrigeration energy consumption cost to increase. In the prior art, a heat insulation cover is covered on the surface of a reflow soldering machine for heat insulation, but the heat insulation cover in the prior art is directly made of heat insulation cotton, so that more dust is contained in the heat insulation cotton, a dust-free workshop is polluted, and the production quality of a printed circuit board is influenced; and the heat shield has a poor heat insulating effect. Therefore, the drawbacks of the prior art are obvious, and a solution is needed.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings in the prior art, and provides a method for manufacturing a heat shield for a reflow soldering machine and the heat shield manufactured by the method, so that the heating time and the energy consumption cost of the reflow soldering machine are effectively reduced, and the refrigeration energy consumption cost of a workshop is saved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing method of a heat shield for a reflow soldering machine comprises a base and a heating mechanism positioned above the base, and is characterized in that the heat shield consists of an outer-layer leather material and an inner-layer heat-insulating cotton; the manufacturing method comprises the following steps:
step a, dimension measurement and drawing: dividing a shell of the heating mechanism into a plurality of parts, respectively measuring the size of each part, obtaining the size of an outer layer leather material and heat insulation cotton required by each part according to the size of the shell of each part, and drawing an outer layer leather material cutting picture, a heat insulation cotton cutting picture and an outer layer leather material sewing picture of each part;
step b, processing outer-layer leather: weighing raw materials; mixing: adding the weighed raw materials into an internal mixer, and carrying out pressurization mixing to obtain a mixed rubber material; ③ open smelting: adding the mixed rubber material into an open mill for thinning and pressure refining to obtain an open mill rubber material; rolling: erecting the glass fiber cloth on a feeding rack of a calender, and calendering the open-mill sizing material on the glass fiber cloth by the calender according to the required thickness of the outer-layer leather material to obtain a calendered leather material; baking and vulcanizing: baking and vulcanizing the rolled leather through a drying tunnel to obtain outer leather; cooling and rolling: carrying out opposite side winding on the outer-layer leather material from the drying channel in a winding machine;
step c, cutting and sewing outer leather: cutting the outer-layer leather according to the outer-layer leather cutting picture of each part, cutting two pieces of outer-layer leather of each part, sewing the two pieces of outer-layer leather according to the outer-layer leather sewing picture of each part, wherein one surfaces of the glass fiber cloth of the two pieces of outer-layer leather are opposite to each other during sewing, and one reserved side is not sewn to obtain an outer-layer leather bag of each part;
d, cutting and placing inner layer heat insulation cotton: cutting the heat insulation cotton according to the cutting pattern of the heat insulation cotton of each part, cutting two pieces of heat insulation cotton of each part, and flatly placing the two pieces of heat insulation cotton of each part into the corresponding outer-layer leather bags;
step e, bag opening sewing: sewing the bag opening of the outer layer leather bag of each part to obtain the heat insulation cover of each part;
step f, installing a heat shield: the heat shield of each part is laid on the shell of the heating mechanism in sequence, and the edge of the heat shield of each part is pressed by a magnetic pressing strip.
Further, the housing of the heating mechanism is divided into a plurality of parts, specifically, the housing of the heating mechanism is divided into a left part, a right part and a main body part, wherein the main body part is further divided into a first part, a second part, a third part, a fourth part and a fifth part.
Further, the raw materials comprise, by weight: 55-65 parts of 30-degree silica gel, 25-33 parts of calcium bicarbonate, 2-8 parts of a flame retardant, 0.3-1 part of yellow silica gel color master batch and 2-9 parts of a vulcanizing agent.
Further, the raw materials comprise, by weight: 60 parts of 30-degree silica gel, 30 parts of calcium bicarbonate, 5 parts of a flame retardant, 0.5 part of yellow silica gel color master batch and 3-5 parts of a vulcanizing agent.
Further, the drying tunnel sequentially comprises four sections of areas, wherein the baking and vulcanizing temperature of the first section of area is 120 ℃, the baking and vulcanizing temperature of the second section of area is 130 ℃, the baking and vulcanizing temperature of the third section of area is 140 ℃, and the baking and vulcanizing temperature of the fourth section of area is 160 ℃.
Furthermore, the thickness of the glass fiber cloth is 0.2-0.45 mm, and the thickness of the outer-layer leather is 0.35-0.75 mm.
Further, the thickness of the glass fiber cloth is 0.3mm, and the thickness of the outer layer leather is 0.55 mm.
The invention also provides a heat shield for the reflow soldering machine, which is manufactured by the manufacturing method of any one of the heat shields for the reflow soldering machine.
The invention has the beneficial effects that:
1. the overall size of the reflow welding machine is larger, so that the shell of the heating mechanism is divided into a plurality of parts, and then the heat shield is manufactured according to the size of each part, so that the heat shield is convenient to process and install;
2. the heat insulation cotton is put into the bag sewed by the outer layer leather, so that dust in the heat insulation cotton can be prevented from polluting a dust-free workshop, and the heat insulation efficiency of the heat insulation cover is greatly improved by using the outer layer leather;
3. the use of the heat shield effectively prevents the heat loss of the reflow soldering machine, greatly improves the heat insulation efficiency of the reflow soldering machine, and effectively reduces the heating time and the energy consumption cost of the reflow soldering machine.
4. The use of the heat shield effectively reduces the heat emission amount of the reflow soldering machine in the environment, reduces the temperature of a workshop, and saves the refrigeration energy consumption cost of the workshop.
Drawings
FIG. 1 is a schematic view of a reflow soldering machine according to the present invention.
Fig. 2 is an overall dimensional view of a heating mechanism housing of the reflow soldering machine of the present invention.
Fig. 3 is an exploded dimensional view of the heating mechanism housing of the reflow soldering machine of the present invention.
Fig. 4 is a cut-out view of the outer skin of the present invention.
FIG. 5 is a cut-out view of the heat insulating cotton of the present invention.
FIG. 6 is a stitching view of the outer layer of the cover of the present invention.
Description of reference numerals:
1-a base; 2-a body portion; 3-a first part; 4-a second part; 5-a third part; 6-fourth part; 7-the fifth part; 8-left part; 9-right part.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
As shown in fig. 1-2, the reflow soldering machine includes a base 1 and a heating mechanism located above the base 1, wherein the heating mechanism has a large overall size, and the entire heat shield is required to be manufactured to cover the heating mechanism, which not only makes the manufacturing process difficult, but also makes the installation inconvenient, and requires cooperation of a plurality of persons to complete the installation.
As shown in fig. 2-6, the invention provides a method for manufacturing a heat shield for a reflow soldering machine, wherein the heat shield specifically comprises an outer layer leather material and an inner layer heat insulation cotton; the manufacturing method comprises the following steps:
step a, dimension measurement and drawing: dividing a shell of the heating mechanism into a plurality of parts, respectively measuring the size of each part, obtaining the size of an outer layer leather material and heat insulation cotton required by each part according to the size of the shell of each part, and drawing an outer layer leather material cutting picture, a heat insulation cotton cutting picture and an outer layer leather material sewing picture of each part;
step b, processing outer-layer leather: weighing raw materials; mixing: adding the weighed raw materials into an internal mixer, and carrying out pressurization mixing to obtain a mixed rubber material; ③ open smelting: adding the mixed rubber material into an open mill for thinning and pressure refining to obtain an open mill rubber material; rolling: erecting the glass fiber cloth on a feeding rack of a calender, and calendering the open-mill sizing material on the glass fiber cloth by the calender according to the required thickness of the outer-layer leather material to obtain a calendered leather material; baking and vulcanizing: baking and vulcanizing the rolled leather through a drying tunnel to obtain outer leather; cooling and rolling: carrying out opposite side winding on the outer-layer leather material from the drying channel in a winding machine;
step c, cutting and sewing outer leather: cutting the outer-layer leather according to the outer-layer leather cutting picture of each part, cutting two pieces of outer-layer leather of each part, sewing the two pieces of outer-layer leather according to the outer-layer leather sewing picture of each part, wherein one surfaces of the glass fiber cloth of the two pieces of outer-layer leather are opposite to each other during sewing, and one reserved side is not sewn to obtain an outer-layer leather bag of each part;
d, cutting and placing inner layer heat insulation cotton: cutting the heat insulation cotton according to the cutting pattern of the heat insulation cotton of each part, cutting two pieces of heat insulation cotton of each part, and flatly placing the two pieces of heat insulation cotton of each part into the corresponding outer-layer leather bags;
step e, bag opening sewing: sewing the bag opening of the outer layer leather bag of each part to obtain the heat insulation cover of each part;
step f, installing a heat shield: the heat shield of each part is laid on the shell of the heating mechanism in sequence, and the edge of the heat shield of each part is pressed by a magnetic pressing strip.
In practical application, the shell of the heating mechanism is divided into a plurality of parts, and then the heat shield is manufactured according to the size of each part, so that the heat shield is convenient to process and install; and the heat insulation cotton is filled into the bag sewed by the outer layer leather material, so that dust in the heat insulation cotton can be prevented from polluting a dust-free workshop, and the heat insulation efficiency of the heat insulation cover is greatly improved by using the outer layer leather material.
In the present embodiment, the housing of the heating mechanism is divided into a plurality of sections, specifically, the housing of the heating mechanism is divided into a left section 8, a right section 9 and a main body section 2, wherein the main body section 2 is further divided into a first section 3, a second section 4, a third section 5, a fourth section 6 and a fifth section 7.
In practical application, the specific structure and size of the shell of the heating mechanism are combined, and the shell of the heating mechanism is divided specifically, so that the heat shield is convenient to manufacture, and the manufactured heat shield is matched with the shell of the heating mechanism.
In this embodiment, the raw materials include, by weight: 55-65 parts of 30-degree silica gel, 25-33 parts of calcium bicarbonate, 2-8 parts of a flame retardant, 0.3-1 part of yellow silica gel color master batch and 2-9 parts of a vulcanizing agent.
In this embodiment, the raw materials include, by weight: 60 parts of 30-degree silica gel, 30 parts of calcium bicarbonate, 5 parts of a flame retardant, 0.5 part of yellow silica gel color master batch and 3-5 parts of a vulcanizing agent.
In practical application, according to the color of the shell of the reflow welding machine, yellow silica gel color master is added into the outer layer skin material, so that the surface color of the heat shield is similar to the color of the reflow welding machine, and the attractiveness is improved.
In this embodiment, the drying tunnel sequentially includes four sections, where the baking and vulcanizing temperature in the first section is 120 ℃, the baking and vulcanizing temperature in the second section is 130 ℃, the baking and vulcanizing temperature in the third section is 140 ℃, and the baking and vulcanizing temperature in the fourth section is 160 ℃.
In the embodiment, the thickness of the glass fiber cloth is 0.2-0.45 mm, and the thickness of the outer-layer leather is 0.35-0.75 mm.
In this embodiment, the thickness of the glass fiber cloth is 0.3mm, and the thickness of the outer skin material is 0.55 mm.
In practical application, multiple experiments verify that the specific thickness of the obtained glass fiber cloth is 0.3mm, the specific thickness of the outer-layer leather is 0.55mm, and the use of raw materials is reduced as much as possible on the basis of ensuring the heat insulation effect of the heat insulation cover.
In this embodiment, a heat shield for a reflow soldering machine is provided, which is manufactured by the method for manufacturing a heat shield for a reflow soldering machine according to any one of the above embodiments.
The following table is a comparison table of the reflow soldering machine surface temperature with and without the heat shield:
| without heat shield | With heat shields | |
| Surface temperature of reflow machine (summer) | 55.3℃ | 32.5℃ |
According to the data on the upper surface, the heat loss of the reflow soldering machine is effectively prevented by using the heat insulation cover, the heat insulation efficiency of the reflow soldering machine is greatly improved, and the heating time and the energy consumption cost of the reflow soldering machine are effectively reduced. Furthermore, the heat shield effectively reduces the heat emission amount of the reflow soldering machine in the environment, reduces the temperature of a workshop, and saves the refrigeration energy consumption cost of the workshop.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
The above-mentioned embodiments only express a plurality of embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A manufacturing method of a heat shield for a reflow soldering machine comprises a base (1) and a heating mechanism positioned above the base (1), and is characterized in that the heat shield consists of an outer-layer leather material and an inner-layer heat-insulating cotton; the manufacturing method comprises the following steps:
step a, dimension measurement and drawing: dividing a shell of the heating mechanism into a plurality of parts, respectively measuring the size of each part, obtaining the size of an outer layer leather material and heat insulation cotton required by each part according to the size of the shell of each part, and drawing an outer layer leather material cutting picture, a heat insulation cotton cutting picture and an outer layer leather material sewing picture of each part;
step b, processing outer-layer leather: weighing raw materials; mixing: adding the weighed raw materials into an internal mixer, and carrying out pressurization mixing to obtain a mixed rubber material; ③ open smelting: adding the mixed rubber material into an open mill for thinning and pressure refining to obtain an open mill rubber material; rolling: erecting the glass fiber cloth on a feeding rack of a calender, and calendering the open-mill sizing material on the glass fiber cloth by the calender according to the required thickness of the outer-layer leather material to obtain a calendered leather material; baking and vulcanizing: baking and vulcanizing the rolled leather through a drying tunnel to obtain outer leather; cooling and rolling: carrying out opposite side winding on the outer-layer leather material from the drying channel in a winding machine;
step c, cutting and sewing outer leather: cutting the outer-layer leather according to the outer-layer leather cutting picture of each part, cutting two pieces of outer-layer leather of each part, sewing the two pieces of outer-layer leather according to the outer-layer leather sewing picture of each part, wherein one surfaces of the glass fiber cloth of the two pieces of outer-layer leather are opposite to each other during sewing, and one reserved side is not sewn to obtain an outer-layer leather bag of each part;
d, cutting and placing inner layer heat insulation cotton: cutting the heat insulation cotton according to the cutting pattern of the heat insulation cotton of each part, cutting two pieces of heat insulation cotton of each part, and flatly placing the two pieces of heat insulation cotton of each part into the corresponding outer-layer leather bags;
step e, bag opening sewing: sewing the bag opening of the outer layer leather bag of each part to obtain the heat insulation cover of each part;
step f, installing a heat shield: the heat shield of each part is laid on the shell of the heating mechanism in sequence, and the edge of the heat shield of each part is pressed by a magnetic pressing strip.
2. The method for manufacturing a heat shield for a reflow soldering machine according to claim 1, characterized in that: the shell of the heating mechanism is divided into a plurality of parts, specifically, the shell of the heating mechanism is divided into a left part (8), a right part (9) and a main body part (2), wherein the main body part (2) is further divided into a first part (3), a second part (4), a third part (5), a fourth part (6) and a fifth part (7).
3. The method for manufacturing a heat shield for a reflow soldering machine according to claim 1, characterized in that: the raw materials comprise the following components in parts by weight: 55-65 parts of 30-degree silica gel, 25-33 parts of calcium bicarbonate, 2-8 parts of a flame retardant, 0.3-1 part of yellow silica gel color master batch and 2-9 parts of a vulcanizing agent.
4. The method of manufacturing a heat shield for a reflow soldering machine according to claim 3, characterized in that: the raw materials comprise the following components in parts by weight: 60 parts of 30-degree silica gel, 30 parts of calcium bicarbonate, 5 parts of a flame retardant, 0.5 part of yellow silica gel color master batch and 3-5 parts of a vulcanizing agent.
5. The method for manufacturing a heat shield for a reflow soldering machine according to claim 1, characterized in that: the drying tunnel sequentially comprises four sections of areas, wherein the baking and vulcanizing temperature of the first section of area is 120 ℃, the baking and vulcanizing temperature of the second section of area is 130 ℃, the baking and vulcanizing temperature of the third section of area is 140 ℃, and the baking and vulcanizing temperature of the fourth section of area is 160 ℃.
6. The method for manufacturing a heat shield for a reflow soldering machine according to any one of claims 1 to 5, characterized in that: the thickness of the glass fiber cloth is 0.2-0.45 mm, and the thickness of the outer-layer leather is 0.35-0.75 mm.
7. The method of manufacturing a heat shield for a reflow soldering machine according to claim 6, characterized in that: the thickness of the glass fiber cloth is 0.3mm, and the thickness of the outer layer leather is 0.55 mm.
8. A heat shield for a reflow soldering machine, characterized in that the heat shield is produced by the method for producing a heat shield for a reflow soldering machine according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210061449.3A CN114347492A (en) | 2022-01-19 | 2022-01-19 | Manufacturing method of heat shield for reflow soldering machine and heat shield manufactured by same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210061449.3A CN114347492A (en) | 2022-01-19 | 2022-01-19 | Manufacturing method of heat shield for reflow soldering machine and heat shield manufactured by same |
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| 山东化学工学院: "简明图解橡胶成型手册", 西北工业大学出版社 * |
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Application publication date: 20220415 |