Temperature sensor and processing equipment thereof

Abstract

The invention discloses a temperature sensor and processing equipment thereof, the temperature sensor comprises a temperature sensing module, a metal shell formed by drawing a sheet metal part and an insulating plug, the metal shell is provided with a concave cavity, the temperature sensing module is attached to the bottom of the concave cavity, and the temperature sensing module comprises a thermistor and an insulating layer; the bottom of an extraction electrode of the thermistor is separated from the metal shell through an insulating layer; the insulating plug is matched with the concave cavity in a positioning and inserting mode, a conductive contact is arranged at the inner end of the insulating plug and electrically connected with the leading-out electrode, and a lead is arranged at the outer end of the insulating plug and electrically connected with the conductive contact. The temperature sensing module is firstly arranged on the sheet metal part, when the sheet metal part is drawn to the metal shell, the temperature sensing module is formed on the inner bottom surface of the metal shell and is matched with the insulation plug to be in positioning insertion connection with the metal shell, the insulation plug can be connected with the thermistor of the temperature sensing module, and rapid installation of the temperature sensor is achieved; and the position of the temperature sensing module of each temperature sensor is fixed, and the consistency is high.

Description

[0001] Divisional application, original application number: 202310498650.2, application date: May 5, 2023; invention title: temperature sensor and its processing technology and processing equipment. Technical Field

[0002] This invention relates to a temperature sensor, and more particularly to a temperature sensor and its processing equipment. Background Technology

[0003] Current temperature sensors consist of a metal casing and a thermistor. The metal casing has an inner cavity with an open tail. The thermistor has lead electrodes that are electrically connected to the temperature sensing signal lead. The thermistor is encapsulated in the inner cavity by an insulating thermally conductive material, while the temperature sensing signal lead extends out of the cavity. Because the metal casing is fabricated independently, it needs to be rearranged and assembled with the thermistor after processing, resulting in a large workload. Furthermore, since the thermistor is only connected by leads and cannot be positioned within the metal casing, it requires potting with an insulating thermally conductive material. The thermistor can only be encapsulated and positioned after the insulating thermally conductive material has dried. These factors contribute to the current low production capacity of temperature sensors and their unstable parameters. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature sensor with a simple and reasonable structure, convenient installation, high-efficiency production, and stable quality, as well as its processing technology and equipment.

[0005] The objective of this invention is achieved as follows: A temperature sensor includes a temperature sensing module, a metal housing formed by deep drawing sheet metal, and an insulating plug. The metal housing has a cavity, and the temperature sensing module is attached to the bottom of the cavity. The temperature sensing module includes a thermistor and an insulating layer. The bottom of the lead electrode of the thermistor is separated from the metal housing by the insulating layer. The insulating plug is positioned and inserted into the cavity. The inner end of the insulating plug has a conductive contact that is electrically connected to the lead electrode. The outer end of the insulating plug has a lead wire that is electrically connected to the conductive contact.

[0006] The objective of this invention can also be achieved by the following technical measures: As a more specific embodiment, a limiting boss is provided on the inner side of the cavity opening end of the metal shell, and a guide positioning groove is provided on the side wall of the insulating plug in the axial direction corresponding to the limiting boss. An anti-disengagement hook is provided on the bottom of the guide positioning groove corresponding to the limiting boss. A thermally conductive insulating potting layer is provided in the gap between the insulating plug and the cavity.

[0007] As a further embodiment, a thermally conductive layer is provided between the thermistor and the bottom of the cavity.

[0008] As a further embodiment, the inner end of the insulating plug is provided with a sliding groove hole, one end of the conductive contact is slidably engaged with the sliding groove hole, the other end of the conductive contact extends out of the sliding groove hole and contacts the lead electrode of the thermistor, the lead wire extends into the sliding groove hole, and a conductive spring is also provided in the sliding groove hole, the conductive spring being pressed between the conductive contact and the lead wire.

[0009] As a further embodiment, the insulating plug is injection molded and integrated with the lead wire. The insulating plug has an internal injection channel that leads to the outer top surface and inner surface of the insulating plug.

[0010] A temperature sensor molding process involves pre-setting a temperature sensing module on a sheet metal part; then, a deep drawing process is used to draw the sheet metal part to form a cavity, with the temperature sensing module formed on the inner end face of the cavity; next, the opening of the cavity is punched to make the top surface of the opening of the cavity flush, and an inwardly convex limiting boss is formed on the side of the cavity; after the insulating plug is inserted into the cavity, it is engaged with the limiting boss; finally, a thermally conductive insulating potting layer is injected into the gap between the insulating plug and the cavity.

[0011] A temperature sensor processing device includes a fixed mold and a drawing die head, a cutting auxiliary die head, and a boss forming auxiliary die head that selectively cooperate with the fixed mold; the fixed mold has a mold cavity, and the upper part of the mold cavity is provided with a side pressure head and a shear slide plate from bottom to top; The drawing die is used to draw the sheet metal part equipped with the temperature sensing module into a metal shell blank. The lower end of the drawing die is provided with a first relief groove corresponding to the temperature sensing module, and the upper end of the drawing die is connected to the first pressure device. The lower end of the cutting auxiliary die head is provided with a second clearance groove corresponding to the temperature sensing module. The cutting auxiliary die head is used to insert into the metal shell blank and support the lower side wall at the cut of the metal shell blank. The upper end of the cutting auxiliary die head is connected to the lifting drive device through a connecting rod. The shear slide is composed of two pieces. The shear slide is horizontally mounted on the fixed die. The shear slide is provided with a semi-circular clearance groove corresponding to the upper part of the metal shell blank. By controlling the horizontal movement of the shear slide, the material on the upper part of the metal shell blank can be cut. The boss forming auxiliary die head is connected to the lifting drive device and is used to insert into the cut metal shell blank. The side wall of the boss forming auxiliary die head is provided with a shaping concave surface corresponding to the side pressing head. The side pressing head pushes the upper wall of the metal shell blank towards the shaping concave surface to form the limiting boss. The side wall of the boss forming auxiliary die head is provided with a relief groove below the shaping concave surface. A telescopic pressure plate is provided in the relief groove. When the telescopic pressure plate extends, it presses against the side wall of the metal shell blank below the limiting boss. When the top of the telescopic pressure plate touches the bottom of the limiting boss, it retracts inward.

[0012] The bottom of the mold cavity of the fixed mold is also provided with a lower ejector rod, which is used to support the bottom of the sheet metal part and descends synchronously with the deep drawing die head during deep drawing.

[0013] It also includes an insulating plug sorting and storage mechanism for arranging, transferring and storing insulating plugs in an orderly manner, and a feeding mechanism for pushing the insulating plugs into the metal casing within the insulating plug sorting and storage mechanism.

[0014] It also includes a thermally conductive insulating potting compound injection mechanism, which injects the thermally conductive insulating potting compound between the metal shell and the insulating plug; the fixed mold is provided in two or more sets. After one set of fixed molds completes the injection of thermally conductive insulating potting compound, it is moved away and waits for the thermally conductive insulating potting compound to dry. Finally, the ejector rod pushes out the completed temperature sensor, and the fixed mold continues to install the next temperature sensor, and so on.

[0015] The beneficial effects of this invention are as follows: (1) The temperature sensing module of this temperature sensor is pre-set on the sheet metal part for forming the metal shell. When the sheet metal part is drawn and formed, the temperature sensing module is formed on the bottom surface of the cavity of the metal shell. It is connected to the metal shell with the insulating plug for positioning. The conductive contact of the insulating plug can be connected to the thermistor of the temperature sensing module, realizing the rapid installation of the temperature sensor. Moreover, the position of the temperature sensing module of each temperature sensor is fixed and the consistency is high.

[0016] (2) The metal shell, insulating socket installation and insulating thermal conductive material potting of this temperature sensor can be completed on the same mold, and multiple metal shells can be completed at one time. Therefore, the processing is more convenient and the production efficiency is higher. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 Enlarged structural diagram at point B.

[0019] Figure 3 This is an exploded structural diagram of the present invention.

[0020] Figure 4 This is a top view of the metal casing structure in this invention.

[0021] Figure 5 This is a top view of the insulating plug structure in this invention.

[0022] Figure 6 This is a schematic diagram of the process of assembling the temperature sensing module with the sheet metal parts in this invention.

[0023] Figure 7 This is a schematic diagram of the sheet metal part with a temperature sensing module before deep drawing in this invention.

[0024] Figure 8 This is a schematic diagram of the mold structure of the temperature sensor processing equipment in this invention.

[0025] Figure 9 and Figure 10 This is a schematic diagram of the deep drawing process of a sheet metal part equipped with a temperature sensing module in this invention.

[0026] Figures 11 to 14 This is a schematic diagram of the metal shell blank cutting process in this invention.

[0027] Figure 15 This is a schematic diagram of the structure for preparing a stamping limiting boss for the metal shell blank in this invention.

[0028] Figure 16 This is a schematic diagram of the auxiliary die head structure for protrusion forming in this invention.

[0029] Figures 17 to 21 This is a schematic diagram of the machining process of the limiting boss on the metal shell blank in this invention. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figures 1 to 21 As shown, a temperature sensor includes a temperature sensing module 3, a metal housing 1 formed by deep drawing sheet metal 10, and an insulating plug 2. The metal housing 1 has a cavity 12, and the temperature sensing module 3 is attached to the bottom of the cavity 12. The temperature sensing module 3 includes a thermistor 31 and an insulating layer 33. The bottom of the lead electrode 311 of the thermistor 31 is separated from the metal housing 1 by the insulating layer 33. The insulating plug 2 is positioned and inserted into the cavity 12. The inner end of the insulating plug 2 has a conductive contact 23, which is electrically connected to the lead electrode 311. The outer end of the insulating plug 2 has a lead wire 21, which is electrically connected to the conductive contact 23. The lead electrode 311 and the insulating layer 33 are connected by a gold-plated layer 34.

[0031] The inner side of the opening end of the cavity 12 of the metal shell 1 is provided with a limiting boss 11. The side wall of the insulating plug 2 is provided with a guide positioning groove 27 axially corresponding to the limiting boss 11. The guide positioning groove 27 is provided with an anti-disengagement hook 22 corresponding to the bottom of the limiting boss 11. A thermally conductive insulating potting layer 4 is provided between the insulating plug 2 and the cavity 12. The thermally conductive insulating potting layer 4 is an epoxy resin potting layer.

[0032] A thermally conductive layer 32 is provided between the thermistor 31 and the bottom of the cavity 12. The thermally conductive layer 32 is a graphene coating.

[0033] The inner end of the insulating plug 2 is provided with a sliding groove 24. One end of the conductive contact 23 is slidably engaged with the sliding groove 24, and the other end of the conductive contact 23 extends out of the sliding groove 24 and contacts the lead electrode 311 of the thermistor 31. The lead wire 21 extends into the sliding groove 24. A conductive spring 25 is also provided in the sliding groove 24, and the conductive spring 25 is pressed between the conductive contact 23 and the lead wire 21.

[0034] The insulating plug 2 is injection molded and integrated with the lead wire 21. The insulating plug 2 has an internal injection channel 28 that leads to the outer top surface and inner surface of the insulating plug 2. The thermally conductive insulating potting layer 4 is injected into the cavity 12 of the metal shell 1 and flows through the injection channel 28 to the gap between the metal shell 1 and the insulating plug 2.

[0035] A temperature sensor molding process involves pre-setting a temperature sensing module 3 on a sheet metal part 10; then, a deep drawing process is used to draw the sheet metal part 10 to form a cavity 12, with the temperature sensing module 3 formed on the inner end face of the cavity 12; next, the opening of the cavity 12 is punched to make the top surface of the opening of the cavity 12 flush, and an inwardly protruding limiting boss 11 is formed on the side of the cavity 12; after the insulating plug 2 is inserted into the cavity 12, it is engaged with the limiting boss 11; finally, a thermally conductive insulating potting layer 4 is injected into the gap between the insulating plug 2 and the cavity 12.

[0036] A temperature sensor processing device includes a fixed mold 6 and a drawing die 5, a cutting auxiliary die 8, and a boss forming auxiliary die 9 that selectively cooperate with the fixed mold 6; the fixed mold 6 is provided with a mold cavity 61, and the upper part of the mold cavity 61 is provided with a side pressure head 63 and a shear slide plate 62 from bottom to top.

[0037] The drawing die 5 is used to draw the sheet metal part 10 equipped with the temperature sensing module 3 into a metal shell 1 blank. The lower end of the drawing die 5 is provided with a first relief groove 51 corresponding to the temperature sensing module 3, and the upper end of the drawing die 5 is connected to the first pressure device (not shown in the figure).

[0038] The lower end of the cutting auxiliary die head 8 is provided with a second clearance groove 811 corresponding to the temperature sensing module 3. The cutting auxiliary die head 8 is used to insert into the metal shell 1 blank and support the lower side wall at the cut of the metal shell 1 blank. The cutting auxiliary die head 8 includes a die head body 81 and a connecting rod 82. The connecting rod 82 is located at the upper end of the die head body 81 and is connected to the lifting drive device. The diameter of the connecting rod 82 is smaller than the diameter of the die head body 81 (about 1 / 3). The shear slide plate 62 is composed of two pieces. The shear slide plate 62 is horizontally mounted on the fixed die 6. The shear slide plate 62 is provided with a semi-circular clearance groove corresponding to the upper part of the metal shell 1 blank. By controlling the horizontal movement of the shear slide plate 62, the material on the upper part of the metal shell 1 blank can be cut.

[0039] The boss forming auxiliary die head 9 is connected to the lifting drive device and is used to insert into the cut metal shell 1 blank. The side wall of the boss forming auxiliary die head 9 is provided with a shaping concave surface 921 corresponding to the side pressing head 63. The side pressing head 63 pushes the upper wall of the metal shell 1 blank towards the shaping concave surface 921 to form the limiting boss 11. The side wall of the boss forming auxiliary die head 9 is provided with a relief groove below the shaping concave surface 921. A telescopic pressure plate 93 is provided in the relief groove. When the telescopic pressure plate 93 extends, it presses against the side wall of the metal shell 1 blank below the limiting boss 11. When the top of the telescopic pressure plate 93 touches the bottom of the limiting boss 11, it retracts inward.

[0040] The boss forming auxiliary die head 9 includes a lower die head 95 and an upper die head 92 connected to each other. A shaping concave surface 921 is provided on the left and right sides of the upper die head 92. The bottom of the lower die head 95 has a third clearance groove 951 corresponding to the temperature sensing module 3. A cavity 952 is provided inside the lower die head 95. Inclined sliding grooves 97 are provided on both sides of the cavity 952 below the shaping concave surface 921. The telescopic pressure plate 93 slides obliquely up and down within the inclined sliding grooves 97 (the inclined surface guiding the oblique sliding of the telescopic pressure plate 93 is shown in the figure). Figure 16 As shown by arrow I2, a linkage pad 96 and a compression spring 94 are sequentially arranged between the bottom of the telescopic pressure plate 93 and the cavity 952. The compression spring 94 keeps the telescopic pressure plate 93 in a raised and outward protruding state under normal conditions. The upper mold head 92 has a central hole communicating with the cavity 952. A support rod 91 is provided in the central hole. The support rod 91 can move up and down, and the lower end of the support rod 91 is also provided with a cone. When the support rod 91 is inserted into the cavity 952, it can push the two telescopic pressure plates 93 outward and prevent the telescopic pressure plates 93 from retracting inward.

[0041] The lower end of the boss forming auxiliary die 9 is provided with a cavity 952, and the two sides of the middle part of the cavity 952 are provided below the shaping concave surface 921. The bottom of the cavity 61 of the fixed mold 6 is also provided with a lower ejector rod 7, which is used to support the bottom of the sheet metal part 10 and descends synchronously with the deep drawing die head 5 during deep drawing.

[0042] It also includes an insulating plug sorting and storage mechanism for orderly arranging, transferring, and storing the insulating plugs 2, and a feeding mechanism for pushing the insulating plugs 2 from the insulating plug sorting and storage mechanism into the metal housing 1, which are not shown in the figure. The insulating plug sorting and storage mechanism can be a combination of a vibrating plate for sorting the insulating plugs 2 and a storage cassette. The feeding mechanism can be a pneumatic push rod that moves the insulating plug sorting and storage mechanism until its outlet aligns with the cavity of the metal housing 1, and then pushes the insulating plugs 2 into the metal housing 1 via the pneumatic push rod.

[0043] It also includes a thermally conductive insulating potting compound injection mechanism (not shown in the figure), which injects the thermally conductive insulating potting compound between the metal shell 1 and the insulating plug 2; the fixed mold 6 is provided in two or more sets. After one set of fixed mold 6 completes the injection of thermally conductive insulating potting compound, it is moved away and waits for the thermally conductive insulating potting compound to dry. Finally, the lower ejector rod 7 ejects the completed temperature sensor, and the fixed mold 6 continues to install the next temperature sensor, and so on.

[0044] Its processing principle is: Combination Figure 6 As shown, a thermally conductive layer 32 is first applied (or printed) to the sheet metal part 10, followed by an insulating layer 33. Then, a thermistor 31 is placed on the sheet metal part 10 using a robotic arm (surface mount technology). Finally, a gold spraying layer 34 is applied between the lead-out electrodes 311 of the thermistor 31 and the top surface of the insulating layer 33, thus forming a temperature-sensing module 3 on the sheet metal part 10. Combined with... Figure 7 As shown, multiple temperature sensing modules 3 can be set on a large sheet metal part 10.

[0045] Combination Figure 8 As shown, the sheet metal part 10 equipped with the temperature sensing module 3 is placed on the mold, with the temperature sensing module 3 corresponding to the mold cavity 61 of the fixed mold 6. The drawing die head 5 moves above the temperature sensing module 3, and the cutting auxiliary die head 8 and the boss forming auxiliary die head 9 are ready to be used next to the drawing die head 5. The lower ejector rod 7 rises in the direction of arrow B, supporting the bottom surface of the sheet metal part 10 at the bottom of the temperature sensing module 3. Figure 9 The state shown; then, the drawing die head 5 and the lower ejector pin 7 descend synchronously along the directions of arrows C and D to the indicated state. Figure 10 The state shown indicates the formation of a metal outer shell blank 1. See also... Figure 11 As shown, the drawing die 5 is removed and moved aside to stand by. The cutting auxiliary die 8 is moved to face the die cavity 61 and descends in the direction of arrow E, inserting into the metal shell 1 blank. Then, the shear slide plate 62 is controlled to move horizontally back and forth in the direction of arrow F to cut off the excess edges of the metal shell 1 blank (see...). Figure 12 The image shown is a schematic diagram of the shear slide 62 in its in-situ position; see Figure 13 As shown, this is the edge material G1 cut by the first translation of the shear slide 62; see Figure 14 As shown, this is the edge material G2 cut by the second translation of the shear slide 62; edge materials G1 and G2 are connected as one piece), and the edge material is taken away when the cutting auxiliary die head 8 is lifted. Combined with... Figure 15As shown, the cutting auxiliary mold head 8 is lifted and moved away, and the boss forming auxiliary mold head 9 is moved to face the mold cavity 61. Then, it is inserted into the metal shell 1 (without forming the limiting boss 11) in the direction of arrow H1. After the boss forming auxiliary mold head 9 is fully inserted into the metal shell 1, the support rod 91 continues to be inserted into the cavity 952 in the direction of arrow H2, pushing the two telescopic pressure plates 93 outward and preventing the telescopic pressure plates 93 from retracting inward. Then, the left and right side pressure heads 63 are controlled to move in the directions of arrows J1 and J2, respectively. Figures 17 to 19 As shown; thus, the limiting boss 11 is machined into the metal casing 1. See also Figure 20 As shown, when raising the boss forming auxiliary die head 9, first raise the support rod 91 in the direction of arrow K, then raise the upper die head 92 and the lower die head 95. When the outer upper end of the telescopic pressure plate 93 (see...) Figure 16 (As shown at point I1) When the limiting boss 11 is touched, the telescopic pressure plate 93 moves downward and slides inward along the inclined surface of the inclined slide groove 97, thereby avoiding the limiting boss 11. Figure 21 As shown. The final metal casing 1 can be ejected by the lower push rod 7; or, the metal casing 1 can remain in place until the insulating plug 2 and the thermally conductive insulating potting layer 4 are installed to form a temperature sensor, after which it can be ejected by the lower push rod 7.

[0046] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A temperature sensor, comprising a temperature sensing module (3), characterized in that: It also includes a metal shell (1) formed by deep drawing sheet metal (10) and an insulating plug (2). The metal shell (1) has a cavity (12). The temperature sensing module (3) is attached to the bottom of the cavity (12). The temperature sensing module (3) includes a thermistor (31) and an insulating layer (33). The bottom of the lead electrode (311) of the thermistor (31) is separated from the metal shell (1) by the insulating layer (33). The insulating plug (2) is positioned and plugged into the cavity (12). The inner end of the insulating plug (2) is provided with a conductive contact (23). The conductive contact (23) is electrically connected to the lead electrode (311). The outer end of the insulating plug (2) is provided with a lead wire (21). The lead wire (21) is electrically connected to the conductive contact (23). The inner side of the opening end of the cavity (12) of the metal shell (1) is provided with a limiting boss (11), and the side wall of the insulating plug (2) is provided with a guide positioning groove (27) axially corresponding to the limiting boss (11). The guide positioning groove (27) is provided with an anti-detachment barb (22) corresponding to the bottom of the limiting boss (11); a thermally conductive insulating potting layer (4) is provided between the insulating plug (2) and the cavity (12).

2. The temperature sensor according to claim 1, characterized in that: A thermally conductive layer (32) is provided between the thermistor (31) and the bottom of the cavity (12).

3. The temperature sensor according to claim 1, characterized in that: The inner end of the insulating plug (2) is provided with a sliding groove (24). One end of the conductive contact (23) is slidably engaged with the sliding groove (24), and the other end of the conductive contact (23) extends out of the sliding groove (24) and contacts the lead electrode (311) of the thermistor (31). The lead wire (21) extends into the sliding groove (24), and a conductive spring (25) is also provided in the sliding groove (24). The conductive spring (25) is pressed between the conductive contact (23) and the lead wire (21).

4. The temperature sensor according to claim 1, characterized in that: The insulating plug (2) is injection molded and connected to the lead wire (21) as a whole. The insulating plug (2) has an injection channel (28) inside, which leads to the outer top surface and inner surface of the insulating plug (2).

5. A processing apparatus for a temperature sensor according to claim 1, characterized in that: It includes a fixed mold (6) and a drawing die head (5) that selectively cooperates with the fixed mold (6), a cutting auxiliary die head (8), and a boss forming auxiliary die head (9); the fixed mold (6) is provided with a mold cavity (61), and the upper part of the mold cavity (61) is provided with a side pressure head (63) and a shear slide plate (62) from bottom to top respectively. The drawing die (5) is used to draw the sheet metal part (10) equipped with the temperature sensing module (3) into a metal shell (1) blank. The lower end of the drawing die (5) is provided with a first relief groove (51) corresponding to the temperature sensing module (3), and the upper end of the drawing die (5) is connected to the first pressure device. The lower end of the cutting auxiliary mold (8) is provided with a second relief groove (811) corresponding to the temperature sensing module (3). The cutting auxiliary mold (8) is used to insert into the blank of the metal shell (1) and support the lower side wall at the cut of the blank of the metal shell (1). The upper end of the cutting auxiliary mold (8) is connected to the lifting drive device through the connecting rod (82). The shear slide plate (62) is composed of two pieces. The shear slide plate (62) is horizontally mounted on the fixed mold (6). The shear slide plate (62) is provided with a semi-circular relief groove corresponding to the upper part of the blank of the metal shell (1). By controlling the horizontal movement of the shear slide plate (62), the material on the upper part of the blank of the metal shell (1) can be cut. The boss forming auxiliary die (9) is connected to the lifting drive device and is used to insert into the cut metal shell (1) blank. The side wall of the boss forming auxiliary die (9) is provided with a shaping concave surface (921) corresponding to the side pressure head (63). The side pressure head (63) pushes the upper wall of the metal shell (1) blank towards the shaping concave surface (921) to form the limiting boss (11). The side wall of the boss forming auxiliary die (9) is provided with a relief groove below the shaping concave surface (921). A telescopic pressure plate (93) is provided in the relief groove. When the telescopic pressure plate (93) extends, it presses against the side wall of the metal shell (1) blank below the limiting boss (11). When the top of the telescopic pressure plate (93) touches the bottom of the limiting boss (11), it retracts inward.

6. The processing equipment for the temperature sensor according to claim 5, characterized in that: The bottom of the cavity (61) of the fixed mold (6) is also provided with a lower ejector rod (7), which is used to support the bottom of the sheet metal part (10) and descends synchronously with the deep drawing die (5) during deep drawing.

7. The processing equipment for the temperature sensor according to claim 5, characterized in that: It also includes an insulating plug sorting and storage mechanism for arranging, transferring and storing the insulating plugs (2) in an orderly manner, and a feeding mechanism for pushing the insulating plugs (2) into the metal shell (1) within the insulating plug sorting and storage mechanism.

8. The processing equipment for the temperature sensor according to claim 5, characterized in that: It also includes a thermally conductive insulating potting compound injection mechanism, which injects the thermally conductive insulating potting compound between the metal shell (1) and the insulating plug (2); the fixed mold (6) is provided with two or more sets. After one set of fixed mold (6) completes the injection of thermally conductive insulating potting compound, it is removed and waits for the thermally conductive insulating potting compound to dry. Finally, the lower ejector rod (7) ejects the completed temperature sensor, and the fixed mold (6) continues to install the next temperature sensor, and so on.

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