CN215750456U - Injection molding mold for micro thermal protector - Google Patents

Abstract

The utility model relates to an injection molding die for a miniature thermal protector, which is characterized by comprising a male die and a female die, wherein a molding convex part is arranged on the male die, a molding groove is arranged on the female die, an injection hole penetrating to the bottom of the molding groove is also arranged on the outer surface of the female die, the molding convex part is embedded in the molding groove, a molding cavity is formed in front of the outer surface of the molding convex part and the wall of the molding groove and matched with a shell of the miniature thermal protector, the bottom of the molding groove corresponds to the outer surface of the shell of the miniature thermal protector, a clamping cavity is also arranged between the male die and the female die, and one end of the clamping cavity is communicated with the molding cavity. Through the structural design, the injection hole can avoid the complex concave-convex structure of the inner wall of the thermal protector shell, so that the manufacturing difficulty of the injection molding mold of the miniature thermal protector can be reduced, the molding quality of the thermal protector shell can be effectively improved, the shell can be stably injected on other parts, and the reliability and the stability are very good.

Description

Injection molding mold for micro thermal protector

Technical Field

The utility model relates to the field of thermal protector production equipment, in particular to an injection molding mold for a miniature thermal protector.

Background

At present, in order to improve the application range of the thermal protector, the volume of the thermal protector is made smaller and smaller. The conventional thermal protector shell is mostly formed by injection molding, and more holes, grooves and/or protrusions are required to be formed on the thermal protector shell, so that a complex concave-convex structure is formed on the thermal protector shell. Therefore, when the volume of the thermal protector shell is small, the situation of difficult injection molding is caused, and the situation of poor molding quality of the thermal protector shell is easily caused.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solve the above problems and disadvantages and to provide an injection mold for a micro thermal protector, in which a groove bottom of a molding groove corresponds to an outer surface of a housing of the micro thermal protector and an injection hole penetrates through the groove bottom of the molding groove, so that the injection hole can avoid a complex concave-convex structure of an inner wall of the housing of the thermal protector, which not only reduces a manufacturing difficulty of the injection mold for the micro thermal protector but also effectively improves a molding quality of the housing of the thermal protector, and the injection mold for the micro thermal protector can stably inject the housing onto other parts, and has excellent reliability and stability.

The technical scheme of the utility model is realized as follows:

the utility model provides a miniature thermal protector injection moulding mould, its characteristics lie in including terrace die, wherein are equipped with the shaping convex part on the terrace die, the shaping groove has been seted up on the die, still set up the filling hole that runs through to the shaping groove tank bottom on the surface of die, the shaping convex part is set in the shaping groove, is formed with the shaping chamber before on the surface of shaping convex part and the cell wall of shaping groove, the shaping chamber matches with miniature thermal protector shell, the tank bottom of shaping groove corresponds the surface of miniature thermal protector shell, still seted up between terrace die and the die and pressed from both sides the dress chamber to the one end that makes to press from both sides the dress chamber is linked together with the shaping chamber.

Preferably, a positioning convex column is arranged on the cavity wall at the other end of the clamping cavity, and the positioning convex column is of a circular truncated cone structure with a small outer end and a large inner end.

Preferably, an observation hole is formed in the side wall of the female die, penetrates through the other end of the clamping cavity and is opposite to the positioning convex column.

Preferably, the injection molding mold for the miniature thermal protector further comprises a first telescopic piece, a positioning clamping groove is formed in the end portion of the first telescopic piece, the first telescopic piece is embedded on the male mold in a sliding mode, and the end portion of the first telescopic piece is placed in the clamping cavity.

Preferably, the injection molding mold for the miniature thermal protector further comprises a second telescopic piece, a cylindrical hole groove is formed in the end face of one end of the second telescopic piece, the second telescopic piece is embedded on the male mold in a sliding mode, and one end of the second telescopic piece is arranged in the molding cavity.

Preferably, the injection mold for the miniature thermal protector further comprises a third telescopic piece, wherein a convex column part is arranged on one end face of the third telescopic piece, the third telescopic piece is embedded on the convex mold in a sliding mode, and one end of the third telescopic piece is arranged in the forming cavity.

Preferably, the injection mold for the miniature thermal protector further comprises a fourth telescopic piece, a cavity groove is formed in the end face of one end of the fourth telescopic piece, the fourth telescopic piece is embedded on the male die in a sliding mode, and one end of the fourth telescopic piece is arranged in the forming cavity.

Preferably, the bottom of the forming groove is provided with a first pressing convex part.

Preferably, a second pressing convex part is arranged at the top of the forming convex part.

Preferably, the top surface of the forming protrusion is provided with at least one input hole.

The utility model has the beneficial effects that: in the injection molding die for the miniature thermal protector, the injection hole penetrates to the bottom of the molding groove, and the bottom of the molding groove corresponds to the outer surface of the thermal protector shell. This enables the filling hole and avoids the complicated concave-convex structure of thermal protector shell inner wall, and the surface of heat protection shell is comparatively level and smooth, can not only reduce this miniature thermal protector injection moulding mould's the manufacturing degree of difficulty like this, can also make things convenient for the filling hole to pour into fluid raw materials into to help improving the shaping quality of thermal protector shell, this miniature thermal protector injection moulding mould's overall structure is very reliable and stable. One end of the clamping cavity is communicated with the forming cavity through the opening of the clamping cavity. The one end that can conveniently press from both sides the dress location to conductive metal piece or strengthen the sheetmetal like this to just can conveniently directly mould plastics on conductive metal piece or strengthen the sheetmetal and go up the thermal protector casing, and then can process stable in structure's thermal protector accessory effectively, this miniature thermal protector injection moulding mould's reliability is very high.

Drawings

Fig. 1 is a schematic perspective view of a first injection mold according to the present invention.

FIG. 2 is a schematic sectional view of a first injection mold according to the present invention.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2 according to the present invention.

FIG. 4 is a schematic view of a disassembled structure of the first injection mold of the present invention.

FIG. 5 is a partial structural view of a male mold in the first injection mold.

FIG. 6 is a partial structural view of a female mold in the first injection mold.

FIG. 7 is a schematic structural view of a first injection mold in use according to the present invention.

FIG. 8 is a schematic perspective view of a second injection mold according to the present invention.

FIG. 9 is a schematic sectional view showing a second injection mold according to the present invention.

Fig. 10 is an enlarged structural view of the portion B of fig. 9 according to the present invention.

FIG. 11 is a schematic view of a second injection mold according to the present invention.

FIG. 12 is a partial structural view of a male mold in the second injection mold.

FIG. 13 is a partial structural view of a female mold in the second injection mold.

FIG. 14 is a schematic structural view showing a second injection mold in use according to the present invention.

Fig. 15 is a schematic view of an assembly structure of the upper case and the reinforcing metal sheet according to the present invention.

Fig. 16 is a schematic structural view of a reinforcing metal sheet according to the present invention.

Fig. 17 is a schematic view of an assembly structure of the lower case and the conductive metal sheet according to the present invention.

Fig. 18 is a second schematic view of the assembly structure of the lower case and the conductive metal sheet according to the present invention.

Fig. 19 is a schematic structural view of a conductive metal sheet according to the present invention.

FIG. 20 is a schematic view of the structure of the micro thermal protector of the present invention.

Detailed Description

As shown in fig. 1, 2, 5 and 6, the injection molding mold for the micro thermal protector comprises a male mold 1 and a female mold 2, wherein a molding convex part 11 is arranged on the male mold 1, a molding groove 21 is arranged on the female mold 2, an injection hole 22 penetrating to the bottom of the molding groove 21 is further arranged on the outer surface of the female mold 2, the molding convex part 11 is embedded in the molding groove 21, a molding cavity 10 is formed in front of the outer surface of the molding convex part 11 and the wall of the molding groove 21, the molding cavity 10 is matched with the micro thermal protector shell, the bottom of the molding groove 21 corresponds to the outer surface of the micro thermal protector shell, a clamping cavity 20 is further arranged between the male mold 1 and the female mold 2, and one end of the clamping cavity 20 is communicated with the molding cavity 10.

In the injection molding die for the micro thermal protector, the injection hole 22 penetrates to the bottom of the molding groove 21, and the bottom of the molding groove 21 corresponds to the outer surface of the thermal protector shell. This enables filling hole 22 and avoids the complicated concave-convex structure of thermal protector shell inner wall, and the surface of heat protection shell is comparatively level and smooth, can not only reduce this miniature thermal protector injection moulding mould's the manufacturing degree of difficulty like this, can also make things convenient for filling hole 22 to pour into fluid raw materials into to help improving the shaping quality of thermal protector shell, this miniature thermal protector injection moulding mould's overall structure is very reliable and stable.

One end of the clamping cavity 20 is communicated with the forming cavity 10 through the opening of the clamping cavity 20. The one end that can conveniently press from both sides the dress location to conductive metal piece or strengthen the sheetmetal like this to just can conveniently directly mould plastics on conductive metal piece or strengthen the sheetmetal and go up the thermal protector casing, and then can process stable in structure's thermal protector accessory effectively, this miniature thermal protector injection moulding mould's reliability is very high.

The male die 1 and/or the female die 2 are provided with cooling structures (not shown in the figure). The cooling structure is a water cooling structure or an air cooling structure. This achieves a rapid cooling effect.

As shown in fig. 1, 2, 4, 7 to 9, 11, and 14 to 19, the above structure may be applied to two injection molds, namely, a first injection mold 100 and a second injection mold 200, respectively, the first injection mold 100 being used for forming an upper case 300 of the thermal protector, and the second injection mold 200 being used for forming a lower case 400 of the thermal protector. The upper case 300 is injection-molded on a reinforcing metal sheet 500, and the reinforcing metal sheet 500 serves to reinforce the structural strength of the upper case 300. The clamping cavity 20 of the first injection mold 100 is used for clamping and positioning the reinforcing metal sheet 500. The lower case 400 is injection-molded on the conductive metal sheet 600, and the conductive metal sheet 600 may be used not only as a static contact and an electrode sheet, but also to enhance the structural strength of the lower case 400. The clamping cavity 20 of the second injection mold 200 is used for clamping and positioning the conductive metal sheet 600.

As shown in fig. 20, when the micro thermal protector is assembled, the movable contact 700 of the micro thermal protector is inserted into the upper case 300 and the lower case 400, and the bimetal, the PTC block, and the like are placed in the upper case 300 and the lower case 400. Thus, the miniature thermal protector can be assembled.

As shown in fig. 15, 18 and 20, the hatched area C on the upper case 300 corresponds to the injection hole 22 on the first injection mold 100, and the hatched area D on the lower case 400 corresponds to the injection hole 22 on the second injection mold 200. Thus, the upper case 300 and the lower case 400 can be conveniently injection molded.

As shown in fig. 3, 5, 7, 11, 12 and 14, a positioning boss 201 is disposed on a cavity wall at the other end of the clamping cavity 20, and the positioning boss 201 is a circular truncated cone structure with a small outer end and a large inner end. The positioning convex column 201 can be used for limiting the position of the conductive metal sheet or the reinforcing metal sheet, so that the conductive metal sheet or the reinforcing metal sheet can be conveniently and accurately installed in place, and the reliability of the injection molding mold of the miniature thermal protector is further improved. Therefore, the conductive metal sheet or the reinforcing metal sheet can be sleeved conveniently, and the convenience of using the injection molding die of the miniature thermal protector is further improved.

As shown in fig. 3, 5, 7, 11, 12 and 14, the positioning boss 201 is located on the punch 1. Thus, the positioning convex column 201 can be conveniently processed and manufactured.

As shown in fig. 3, 5, 7, 11, 12 and 14, the positioning boss 201 is telescopically arranged on the punch 1. The positioning convex column 201 is linked with the structure on the injection molding machine tool to realize the telescopic action of the positioning convex column 201. This enables the positioning boss 201 to be detached from the conductive metal sheet 600 or the reinforcing metal sheet 500, thereby contributing to improvement of convenience in detachment of the injection-molded workpiece. In the actual manufacturing process, the positioning convex column 201 can be stretched and restored by the spring, which is helpful to improve the accuracy and stability of the movement of the positioning convex column 201. The part of the structure directly adopts the existing structure and is not explained in more detail here.

As shown in fig. 3, 4, 6, 7, 10, 11, 13 and 14, an observation hole 23 is opened on the side wall of the female die 2, and the observation hole 23 is made to penetrate to the other end of the clamping cavity 20, and the observation hole 23 is made to face the positioning boss 201. Through observing hole 23, can conveniently observe electrically conductive sheetmetal or strengthen the assembly status of sheetmetal and location projection 201 to in time discover the inaccurate condition in location, such structure helps further to improve the convenience that this miniature thermal protector injection moulding mould used.

The middle part of the clamping cavity 20 is tightly clamped on the middle part of the conductive metal sheet or the reinforcing metal sheet so as to prevent the molding cavity 10 from being communicated with the other end of the clamping cavity 20, thereby preventing the observation hole 23 from being communicated with the molding cavity 10, and effectively improving the molding quality.

As shown in fig. 3, 4, 10 and 11, the positioning protrusion 201 and the observation hole 23 can be applied to the first injection mold 100 and the second injection mold 200.

As shown in fig. 3, 5, 10 and 12, the injection mold for the micro thermal protector further includes a first extensible member 3, a positioning slot 31 is formed on an end portion of the first extensible member 3, the first extensible member 3 is slidably embedded on the male mold 1, and the end portion of the first extensible member 3 is placed in the clamping cavity 20. The positioning clamping groove 31 can clamp and position the conductive metal sheet or the reinforcing metal sheet, so that the stability and reliability of the installation and positioning of the conductive metal sheet or the reinforcing metal sheet are further improved. Through inlaying first extensible member 3 slip dress at terrace die 1, can satisfy the flexible gliding demand of first extensible member 3, this just can make first extensible member 3 break away from electrically conductive sheetmetal or strengthen the sheetmetal after the shaping is accomplished to help further improving the convenience that the work piece that the shaping appears is detached, this convenience that helps further to improve this miniature thermal protector injection moulding mould and use.

As shown in fig. 5 and 12, the positioning slot 31 is a slot structure with a large opening and a small inner side. Therefore, the conductive metal sheet or the reinforcing metal sheet can be conveniently embedded in the positioning clamping groove 31, and the convenience and the accuracy of installation of the conductive metal sheet or the reinforcing metal sheet are further improved.

In the actual use process, the first telescopic part 3 is linked with a structure on an injection molding machine tool to realize the telescopic action of the first telescopic part 3. This enables the first extensible member 3 to be detached from the conductive metal sheet 600 or the reinforcing metal sheet 500, so that the convenience of detaching the injection-molded workpiece can be improved. In the actual manufacturing process, the first telescopic member 3 can be stretched and restored through a spring, which is helpful to improve the accuracy and stability of the action of the first telescopic member 3. The part of the structure directly adopts the existing structure and is not explained in more detail here.

As shown in fig. 3, 6, 7, 10, 13 and 14, a viewing hole 24 is formed in a side wall of the female die 2, the viewing hole 24 is inserted into the clamping cavity 20, and the viewing hole 24 is opposite to the first extensible member 3. Through looking over hole 24, can conveniently observe electrically conductive sheetmetal or strengthen the sheetmetal and positioning groove 31's equipment situation to in time discover the inaccurate condition in location, such structure helps further improving the convenience that this miniature thermal protector injection moulding mould used.

During injection molding, the conductive metal sheet or the reinforcing metal sheet can block the opening of the clamping cavity 20 on the molding cavity 10, so that the communication between the viewing hole 24 and the molding cavity 10 can be avoided, and the molding quality can be improved.

As shown in fig. 3, 5, 10 and 12, the first expansion part 3 and the viewing hole 24 can be applied to the first injection mold 100 and the second injection mold 200.

As shown in fig. 3 and 5, the injection mold for the micro thermal protector further comprises a second extensible member 4, a cylindrical hole groove 41 is formed in an end face of one end of the second extensible member 4, the second extensible member 4 is slidably embedded in the male mold 1, and one end of the second extensible member 4 is placed in the molding cavity 10. Through the cylindrical hole groove 41, the convex column can be conveniently formed on the thermal protector shell, so that the thermal protector shell can be conveniently assembled. Through inlaying second extensible member 4 slip dress at terrace die 1, can satisfy the flexible gliding demand of second extensible member 4, this just can accomplish the back at the shaping, conveniently makes second extensible member 4 break away from the boss that the shaping came out to help further improving the convenience that the work piece that the shaping appears is detached, this convenience that helps further improving this miniature thermal protector injection moulding mould and uses.

As shown in fig. 5, the cylindrical hole groove 41 has a cylindrical groove structure.

As shown in fig. 5, in the actual manufacturing process, more than two cylindrical holes 41 may be formed on the end surface of the second expansion piece 4. Therefore, more than two convex columns can be conveniently formed on the thermal protector shell, so that the assembling reliability of the thermal protector shell is improved.

As shown in fig. 5, in the actual manufacturing process, at least one cylindrical hole 41 may be provided on the punch 1, and a groove 42 may be provided on the punch 1 and/or a protrusion 43 may be provided on the second telescopic member 4. This facilitates the manufacture of different thermal protector shells.

In the actual use process, the second telescopic part 4 is linked with a structure on an injection molding machine tool to realize the telescopic action of the second telescopic part 4. This enables the second telescopic member 4 to be disengaged from the formed boss, thereby improving the convenience of detaching the injection-molded workpiece. In the actual manufacturing process, the second telescopic element 4 can be stretched and restored through a spring, which is helpful for improving the accuracy and stability of the action of the second telescopic element 4. The part of the structure directly adopts the existing structure and is not explained in more detail here.

As shown in fig. 3 and 5, the second telescopic member 4 is mainly applied to the first injection mold 100. Of course, the second telescopic member 4 may be applied to the second injection mold 200 if necessary.

As shown in fig. 10 and 12, the injection mold for the micro thermal protector further includes a third expansion piece 5, a protruding column 51 is disposed on an end surface of one end of the third expansion piece 5, the third expansion piece 5 is slidably embedded on the male mold 1, and one end of the third expansion piece 5 is placed in the molding cavity 10. Through the arrangement of the convex column part 51, the embedded hole groove can be conveniently formed on the thermal protector shell, so that the thermal protector shell can be conveniently assembled. Through inlaying the slip of third extensible member 5 in terrace die 1, can satisfy the flexible gliding demand of third extensible member 5, this just can make projection 51 break away from the inlay dress hole groove that the shaping came out after the shaping is accomplished to help further improving the convenience that the work piece that the shaping appears is detached, this convenience that helps further improving this miniature thermal protector injection moulding mould and use.

As shown in fig. 12, in the actual manufacturing process, more than two third telescopic members 5 may be provided on the male die 1. This can be convenient for the shaping goes out a plurality of inlaying dress hole grooves to improve the reliability of heat protection device shell equipment.

As shown in fig. 12, the shape and size of each third expansion element 5 can be made different during the actual manufacturing process. For example, the third telescopic member 5 is made into a rod-shaped structure with a circular or rectangular cross section.

In the actual use process, the third extensible member 5 is linked with the structure on the injection molding machine tool, so that the third extensible member 5 can extend and contract. This enables the boss 51 to be separated from the molded insert hole groove, thereby improving the convenience of detaching the injection-molded workpiece. In the actual manufacturing process, the third telescopic element 5 can be stretched and restored through a spring, which is helpful for improving the accuracy and stability of the action of the third telescopic element 5. The part of the structure directly adopts the existing structure and is not explained in more detail here.

As shown in fig. 10 and 12, the third expansion part 5 is mainly applied to the second injection mold 200. Of course, the third telescopic element 5 may also be applied to the first injection mold 100, if desired.

As shown in fig. 12, the injection mold for the micro thermal protector further comprises a fourth expansion piece 6, a cavity groove 61 is formed in an end face of one end of the fourth expansion piece 6, the fourth expansion piece 6 is slidably embedded on the male mold 1, and one end of the fourth expansion piece 6 is placed in the molding cavity 10. Through the arrangement of the cavity groove 61, a protruding structure can be conveniently formed on the thermal protector shell, so that other parts of the thermal protector can be conveniently positioned. Through inlaying fourth extensible member 6 slip dress at terrace die 1, can satisfy the flexible gliding demand of fourth extensible member 6, this just can accomplish the back at the shaping, conveniently makes fourth extensible member 6 break away from the protruding structure that the shaping came out to help further improving the convenience that the work piece that comes appears and detach, this convenience that helps further improving this miniature thermal protector injection moulding mould and use.

As shown in fig. 12, the cavity 61 has a rectangular groove structure.

In the actual use process, the fourth extensible member 6 is linked with the structure on the injection molding machine tool, so that the fourth extensible member 6 can be extended and retracted. This enables the fourth telescopic member 6 to be released from the formed boss structure, thereby improving the convenience of detaching the injection-molded workpiece. In the actual manufacturing process, the fourth telescopic element 6 can be stretched and restored through a spring, which is helpful to improve the accuracy and stability of the action of the fourth telescopic element 6. The part of the structure directly adopts the existing structure and is not explained in more detail here.

As shown in fig. 12, the fourth telescopic element 6 is mainly applied to the second injection mold 200. Of course, the fourth telescopic element 6 may also be applied to the first injection mold 100, if desired.

As shown in fig. 6, a first pressing protrusion 211 is provided at the bottom of the forming groove 21. The first pressing protrusion 211 may be used to press the conductive metal sheet or the reinforcing metal sheet, so that the conductive metal sheet or the reinforcing metal sheet can be stably located in the molding cavity 10, thereby further improving the quality of injection molding.

As shown in fig. 6, the first pressing protrusion 211 is mainly applied to the first injection mold 100. Of course, the first press convex portion 211 may be applied to the second injection mold 200 as needed.

As shown in fig. 3, the first pressing projection 211 presses the reinforcing metal sheet 500, and the reinforcing metal sheet 500 is pressed against the top surface of the forming projection 11. This stably positions the reinforcing metal sheet 500.

As shown in fig. 12, a second pressing protrusion 111 is provided on the top of the forming protrusion 11. The second pressing protrusion 111 may be used to press the conductive metal sheet or the reinforcing metal sheet, so that the conductive metal sheet or the reinforcing metal sheet can be stably located in the molding cavity 10, thereby contributing to further improving the quality of injection molding.

As shown in fig. 12, the second pressing protrusion 111 is mainly applied to the second injection mold 200. Of course, the second press convex portion 111 may be applied to the first injection mold 100 if necessary.

As shown in fig. 10 and 19, the conductive metal sheet 600 is bent to form a bent portion 601 at the bottom of the forming groove 21, and the second pressing projection 111 presses the bent portion 601 to press the bent portion 601 against the bottom of the forming groove 21. This stably positions the conductive metal sheet 600.

As shown in fig. 12, the top surface of the forming protrusion 11 is provided with at least one input hole 112. The input hole 112 functions as the injection hole 22 for inputting the fluid material, which facilitates the injection of the fluid material on both sides of the conductive metal sheet or the reinforcing metal sheet, thereby contributing to the improvement of the uniformity of the fluid diffusion and further contributing to the improvement of the injection molding quality.

As shown in fig. 12 and 17, the structure with the input hole 112 is only suitable for the thermal protector case which needs glue injection on both sides of the conductive metal sheet or the reinforced metal sheet and is provided with the large flat-bottom groove 110.

As shown in fig. 17, the E-shaded areas on the lower case 400 correspond to the input holes 112, respectively. Thus, the lower case 400 can be easily injection molded.

When characters or patterns need to be formed on the heat protector shell, the characters or the patterns can be formed only by processing corresponding shapes on the male die 1.

As shown in fig. 12, the input hole 112 is mainly applied to the second injection mold 200. Of course, the input hole 112 may be applied to the first injection mold 100, if necessary.

As shown in fig. 7, 14-19, in the actual manufacturing process, the transfer of the part may be accomplished by a metal belt to pass the part through the various processing stations in sequence. The following is a technical scheme of injection molding through the first metal belt 800 and the second metal belt 900, specifically: the first metal belt 800 is formed by punching to form a plurality of reinforcing metal sheets 500 arranged side by side, and the second metal belt 900 is formed by punching to form a plurality of conductive metal sheets 600 arranged side by side. In this manner, the reinforcing metal sheets 500 of the first metal belt 800 are sequentially passed through the first injection mold 100, and the upper case 300 is formed on the reinforcing metal sheets 500. The lower case 400 is formed on the conductive metal sheet 600 by sequentially passing the conductive metal sheets 600 on the second metal tape 900 through the second injection mold 200. The processing mode can facilitate the processing and management of the micro thermal protector, thereby being beneficial to improving the injection molding efficiency.

As shown in fig. 7 and 14 to 19, the first metal belt 800 has a plurality of first sleeving holes 801 arranged side by side, and the second metal belt 900 has a plurality of second sleeving holes 901 arranged side by side. During injection molding, the first sleeving hole 801 is sleeved on the positioning convex column 201 on the first injection mold 100, and the second sleeving hole 901 is sleeved on the positioning convex column 201 on the second injection mold 200, so that the conductive metal sheet 600 and the reinforcing metal sheet 500 can be well positioned through the positioning convex column 201.

As shown in fig. 20, after the upper case 300 and the lower case 400 are assembled together, the reinforcing metal piece 500 is separated from the first metal strip 800, and the conductive metal piece 600 is separated from the second metal strip 900, so that the applicable micro thermal protector 120 can be obtained.

As shown in fig. 4 to 7 and 11 to 14, in the actual manufacturing process, two or more injection molding stations may be provided on the first injection mold 100 and the second injection mold 200, so that two or more parts can be simultaneously injection molded by the first injection mold 100 and the second injection mold 200.

Claims (10)

1. The utility model provides a miniature hot protector injection moulding mould which characterized in that: including terrace die (1), die (2), wherein be equipped with shaping convex part (11) on terrace die (1), shaping groove (21) have been seted up on die (2), injection hole (22) that run through to shaping groove (21) tank bottom have still been seted up on the surface of die (2), shaping convex part (11) are inlayed in shaping groove (21), are formed with before on the surface of shaping convex part (11) and the cell wall of shaping groove (21) into one piece chamber (10), shaping chamber (10) and miniature thermal protector shell match, the tank bottom of shaping groove (21) corresponds the surface of miniature thermal protector shell, clamp chamber (20) have still been seted up between terrace die (1) and die (2) to the one end that makes clamp chamber (20) is linked together with shaping chamber (10).

2. The injection mold for a miniature thermal protector according to claim 1, wherein: the cavity wall at the other end of the clamping cavity (20) is provided with a positioning convex column (201), and the positioning convex column (201) is of a circular truncated cone structure with a small outer end and a large inner end.

3. The injection mold for a miniature thermal protector according to claim 2, wherein: an observation hole (23) is formed in the side wall of the female die (2), the observation hole (23) penetrates through the other end of the clamping cavity (20), and the observation hole (23) is opposite to the positioning convex column (201).

4. The injection mold for a miniature thermal protector according to claim 1, wherein: the punch die further comprises a first telescopic piece (3), a positioning clamping groove (31) is formed in the end portion of the first telescopic piece (3), the first telescopic piece (3) is embedded on the punch die (1) in a sliding mode, and the end portion of the first telescopic piece (3) is placed in the clamping cavity (20).

5. The injection mold for a miniature thermal protector according to claim 1, wherein: the punch die is characterized by further comprising a second telescopic piece (4), a cylindrical hole groove (41) is formed in one end face of the second telescopic piece (4), the second telescopic piece (4) is embedded on the punch die (1) in a sliding mode, and one end of the second telescopic piece (4) is arranged in the forming cavity (10).

6. The injection mold for a miniature thermal protector according to claim 1, wherein: the die is characterized by further comprising a third telescopic piece (5), wherein a convex column part (51) is arranged on one end face of the third telescopic piece (5), the third telescopic piece (5) is embedded on the male die (1) in a sliding mode, and one end of the third telescopic piece (5) is arranged in the forming cavity (10).

7. The injection mold for a miniature thermal protector according to claim 1, wherein: the die is characterized by further comprising a fourth telescopic piece (6), wherein a cavity groove (61) is formed in one end face of the fourth telescopic piece (6), the fourth telescopic piece (6) is embedded on the male die (1) in a sliding mode, and one end of the fourth telescopic piece (6) is arranged in the forming cavity (10).

8. The injection mold for a miniature thermal protector according to claim 1, wherein: the bottom of the forming groove (21) is provided with a first jacking convex part (211).

9. The injection mold for a miniature thermal protector according to claim 1, wherein: and a second jacking convex part (111) is arranged at the top of the forming convex part (11).

10. The injection mold for a miniature thermal protector according to claim 1, wherein: the top surface of the molding convex part (11) is provided with at least one input hole (112).

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