Thermistor injection mold

Abstract

The utility model discloses a thermistor injection mold which comprises an upper mold structure and a lower mold structure, the upper mold structure comprises an upper mold cavity block, the upper mold cavity block comprises an upper mold cavity I and an upper mold cavity II, the lower mold structure comprises a lower mold cavity block, the lower mold cavity block comprises a lower mold cavity I and a lower mold cavity II, and when the upper mold structure and the lower mold structure are closed, the upper mold cavity block and the lower mold cavity block are closed. The first upper mold cavity and the first lower mold cavity are combined to form a first finished mold cavity, the second upper mold cavity and the second lower mold cavity are combined to form a second finished mold cavity, and a flow guide channel is arranged on the lower mold cavity block and used for guiding injection molding liquid into the first mold cavity and the second mold cavity. The problem of secondary injection molding caused by shrinkage deformation of a product is solved, bad scrapping caused by shrinkage deformation is reduced, and dual-mold production is achieved.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a thermistor injection mold. Background Art

[0002] Thermistor production requires injection molding as the final step. However, this process can be challenging to wrap around the wires. Workers must maneuver mold components to wrap the wires, resulting in high workload, low efficiency, mold damage, and significant product quality risks. Furthermore, shrinkage of the molded parts makes secondary wrapping difficult, leading to poor injection molding and reduced production efficiency. The following proposes a solution to these problems. Utility Model Content

[0003] The utility model aims to provide a thermistor injection mold, which has the advantages of being able to realize secondary injection molding, reducing the work intensity of employees, and improving the yield of finished products.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A thermistor injection mold includes an upper mold structure and a lower mold structure, the upper mold structure includes an upper mold cavity block, the upper mold cavity block includes an upper mold cavity one and an upper mold cavity two, the lower mold structure includes a lower mold cavity block, the lower mold cavity block includes a lower mold cavity one and a lower mold cavity two, when the upper mold structure and the lower mold structure are closed, the upper mold cavity one and the lower mold cavity one are combined to form a completed mold cavity one, and the upper mold cavity two and the lower mold cavity two are combined to form a completed mold cavity two, and the lower mold cavity block is provided with a flow guide, which is used to drain the injection liquid into the mold cavity one and the mold cavity two.

[0006] Preferably, the upper mold cavity block is provided with two upper mold cavities one and two upper mold cavities two, the two upper mold cavities one are located at the same end of the guide channel, and the two upper mold cavities two are located at the other end of the guide channel, and the lower mold cavity block is provided with two lower mold cavities one and two lower mold cavities two, the two lower mold cavities one respectively correspond to the positions of the two upper mold cavities one, and the two lower mold cavities two respectively correspond to the positions of the two lower mold cavities two, and the guide channel is provided with a number of branch channels, and the injection liquid in the guide channel flows into the two mold cavities one and the two mold cavities two through the branch channels.

[0007] Preferably, a flow channel regulating valve is further provided on the lower mold cavity block, and the flow channel regulating valve is slidingly connected to the lower mold cavity block, one end of the flow channel regulating valve horizontally passes through the guide channel, and a guide groove is provided on the flow channel regulating valve. When the flow channel regulating valve moves to the conducting position, the guide groove and the guide channel are located at the same position; when the flow channel regulating valve moves to the blocking position, the guide groove and the guide channel are completely separated, and the flow channel regulating valve is used to regulate the injection liquid flowing to the mold cavity one.

[0008] Preferably, the upper mold structure also includes an upper mold fixing plate and an upper mold paneling, the upper mold fixing plate is fixedly connected to the upper mold paneling, the upper mold cavity block is embedded in the upper mold paneling, and the lower end surface of the upper mold cavity block is flush with the lower end surface of the upper mold paneling, an injection tube is embedded in the upper mold paneling, the lower end of the injection tube passes through the center position of the upper mold cavity block and is communicated with the guide channel, a guide groove is opened on the upper mold fixing plate, and the lower end of the guide groove is communicated with the upper end of the injection tube.

[0009] Preferably, a retaining ring is embedded in the upper mold fixing plate, and the retaining ring is fixed in the guide groove. The height of the upper end of the retaining ring is higher than the height of the upper end surface of the upper mold fixing plate.

[0010] Preferably, the lower mold structure includes a lower mold fixing plate, a lower mold support plate and a lower mold panel, the lower mold support plate is fixed to the upper end surface of the lower mold fixing plate, the lower mold panel is fixed to the upper end of the lower mold support plate, the lower mold cavity block is embedded in the lower mold panel, and the upper end surface of the lower mold cavity block is flush with the upper end surface of the lower mold panel.

[0011] Preferably, the lower mold panel is provided with a plurality of positioning holes, and the lower end surface of the upper mold panel is fixedly provided with a plurality of positioning columns, and the plurality of positioning columns are plug-fitted into the plurality of positioning holes.

[0012] Preferably, positioning grooves are provided on both sides of the lower mold panel, and a positioning block is fixed on the lower end surface of the upper mold panel, and the positioning block is snap-connected with the positioning grooves.

[0013] Preferably, a plurality of upper limit columns are fixed on the lower end surface of the upper mold panel, and a plurality of lower limit columns are fixed on the corresponding positions of the upper end surface of the lower mold panel. The upper limit columns and the lower limit columns are offset from each other to limit the closing distance between the upper mold structure and the lower mold structure.

[0014] The beneficial effects of this utility model include: This innovative mold structure utilizes a tunnel slider to address the difficulty of encapsulating wires, allowing workers to simply insert the wires. The 2+2 structural design allows for immediate secondary injection molding after the first injection, allowing for on-site adjustments and resolving the secondary molding challenge caused by product shrinkage and deformation. This reduces defective products resulting from shrinkage and deformation, enabling dual-mold production on a vertical machine. This improves product qualification rates, reduces enterprise management costs, and overcomes management and technical challenges. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment;

[0016] Figure 2 This is a schematic structural diagram of an embodiment for illustrating an upper mold structure;

[0017] Figure 3 This is a schematic structural diagram of an embodiment for illustrating the lower mold structure;

[0018] Figure 4 for Figure 3 Magnified view of area A in the middle.

[0019] Figure markings: 1. Upper mold cavity block; 11. Upper mold cavity one; 12. Upper mold cavity two; 2. Lower mold cavity block; 21. Lower mold cavity one; 22. Lower mold cavity two; 3. Guide channel; 31. Flow channel regulating valve; 32. Branch channel; 4. Upper mold fixing plate; 41. Guide groove; 42. Retaining ring; 5. Upper mold panel; 51. Injection tube; 52. Positioning column; 53. Positioning block; 54. Upper limit column; 6. Lower mold fixing plate; 7. Lower mold support plate; 8. Lower mold panel; 81. Positioning hole; 82. Positioning groove; 83. Lower limit column. DETAILED DESCRIPTION

[0020] The following is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions under the concept of the present invention should fall within the scope of protection of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0021] like Figures 1 to 4 As shown, a thermistor injection mold includes an upper mold structure and a lower mold structure. The upper mold structure comprises an upper mold cavity block 1, an upper mold fixing plate 4, and an upper mold panel 5. The upper mold panel 5 is fixed to the lower end surface of the upper mold fixing plate 4. The upper mold cavity block 1 is embedded in the upper mold panel 5, and the lower end surface of the lower mold cavity block 2 is flush with the lower end surface of the lower mold panel 8.

[0022] The lower mold structure comprises a lower mold cavity block 2, a lower mold fixing plate 6, a lower mold support plate 7, and a lower mold panel 8. The lower mold support plate 7 is fixed to the upper end of the lower mold fixing plate 6 and has a cavity inside for mounting buffer springs, bolts, and other fasteners. The lower mold panel 8 is fixed to the upper end of the lower mold support plate 7. The lower mold cavity block 2 is embedded within the lower mold panel 8, with the upper end of the lower mold cavity block 2 flush with the upper end of the lower mold panel 8.

[0023] Upper mold cavity block 1 includes upper mold cavity 11 and upper mold cavity 2 12, and lower mold cavity block 2 includes lower mold cavity 1 21 and lower mold cavity 2 22. When the upper mold structure and lower mold structure are closed, upper mold cavity 1 11 and lower mold cavity 1 21 combine to form the completed mold cavity 1, and upper mold cavity 2 12 and lower mold cavity 2 22 combine to form the completed mold cavity 2. In this design, two upper mold cavity 1 1, upper mold cavity 2 12, lower mold cavity 1 21, and lower mold cavity 2 22 are each provided. That is, after the upper mold structure and lower mold structure are closed, there will be two mold cavities 1 and two mold cavities 2, which can simultaneously inject two thermistors.

[0024] The lower end surface of the upper mold panel 5 is also fixed with a number of upper limit posts 54, and the corresponding positions on the upper end surface of the lower mold panel 8 are fixed with a number of lower limit posts 83. When the upper and lower mold structures are closed, the lower ends of the upper limit posts 54 will abut the upper ends of the lower limit posts 83, preventing the upper and lower mold structures from getting closer, thereby preventing deformation of the mold cavity.

[0025] In this design, the upper and lower mold structures primarily consist of two positioning mechanisms. The first consists of a number of positioning holes 81 in the lower mold panel 8 and a number of positioning posts 52 on the lower end surface of the upper mold panel 5. When the upper and lower mold structures begin to close, the lower ends of the positioning posts 52 first insert into the positioning holes 81. The positions of the positioning posts 52 correspond one-to-one with the positioning holes 81, preventing the upper and lower mold structures from shifting.

[0026] The second part of the positioning structure is the positioning grooves 82 set on both sides of the lower mold panel 8 and the positioning blocks 53 set on the lower end surface of the upper mold panel 5. During the closing process of the upper mold structure and the lower mold structure, the two positioning holes 81 will be respectively inserted into the two positioning grooves 82, so that the upper mold structure and the lower mold structure will not be offset.

[0027] A flow guide 3 is provided on the lower mold cavity block 2. The two mold cavities 1 in this design are located on both sides of the same end of the flow guide 3, and the two mold cavities 2 are located on both sides of the other end of the flow guide 3. Branch channels 32 are provided at both ends of the flow guide 3. The injection liquid in the flow guide 3 flows into the two mold cavities 1 and the two mold cavities 2 through the branch channels 32.

[0028] An injection tube 51 is embedded in the upper mold panel 5. The lower end of the injection tube 51 passes through the center of the upper mold cavity block 1 and communicates with the flow guide 3. A guide groove 41 is formed in the upper mold fixing plate 4. In this design, the guide groove 41 is an inverted hemispherical surface, and the lower end of the guide groove 41 communicates with the upper end of the injection tube 51. The upper end of the guide groove 41 has a larger opening, acting as a funnel. External injection liquid is poured into the guide groove 41, which then guides the injection liquid into the injection tube 51 and ultimately flows out of the lower end of the injection tube 51 into the flow guide 3.

[0029] A retaining ring 42 is embedded in the upper mold fixing plate 4 and fixed in the guide groove 41. The uppermost end of the retaining ring 42 is higher than the upper end surface of the upper mold fixing plate 4. The retaining ring 42 prevents the injection molding liquid from splashing. It is equivalent to raising the sidewalls of the guide groove 41, making it difficult for the injection molding liquid to splash onto the end surface of the upper mold fixing plate 4.

[0030] This design is a mold that can perform secondary injection molding, in which the two mold cavities (one) are the locations for secondary injection molding. Before secondary injection molding, the first injection molding needs to be completed first. Therefore, a flow channel regulating valve 31 is set on the side of the flow guide 3 near the mold cavity (one).

[0031] The flow regulating valve 31 is slidably connected to the lower mold cavity block 2. One end of the flow regulating valve 31 extends transversely through the guide channel 3. The flow regulating valve 31 is provided with a guide groove. When the flow regulating valve 31 is moved to the conducting position, the guide groove and the guide channel 3 are located at the same position. When the flow regulating valve 31 is moved to the blocking position, the guide groove and the guide channel 3 are completely separated. When the flow regulating valve is moved to the blocking position, the guide channel 3 leading to the two mold cavities is blocked, preventing the injection liquid from flowing into the first mold cavity. After the first injection is completed, the guide channel 3 is moved to the conducting position again, and a second injection is performed in the first mold cavity.

[0032] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thermistor injection mold, comprising an upper mold structure and a lower mold structure, characterized in that: The upper mold structure comprises an upper mold cavity block (1), wherein the upper mold cavity block (1) comprises an upper mold cavity one (11) and an upper mold cavity two (12); the lower mold structure comprises a lower mold cavity block (2), wherein the lower mold cavity block (2) comprises a lower mold cavity one (21) and a lower mold cavity two (22); when the upper mold structure and the lower mold structure are closed, the upper mold cavity one (11) is combined with the lower mold cavity one (21) to form a completed mold cavity one, and the upper mold cavity two (12) is combined with the lower mold cavity two (22) to form a completed mold cavity two; a flow guide (3) is provided on the lower mold cavity block (2), and the flow guide (3) is used to guide the injection liquid into the mold cavity one and the mold cavity two.

2. A thermistor injection mold according to claim 1, characterized in that: The upper mold cavity block (1) is provided with two upper mold cavities (11) and two upper mold cavities (12), the two upper mold cavities (11) are located at the same end of the flow guide (3), and the two upper mold cavities (12) are located at the other end of the flow guide (3); the lower mold cavity block (2) is provided with two lower mold cavities (21) and two lower mold cavities (22), the two lower mold cavities (21) respectively correspond to the positions of the two upper mold cavities (11), and the two lower mold cavities (22) respectively correspond to the positions of the two lower mold cavities (22); the flow guide (3) is provided with a plurality of branch channels (32), and the injection liquid in the flow guide (3) flows into the two mold cavities (1) and the two mold cavities (2) through the branch channels (32).

3. The thermistor injection mold according to claim 2, characterized in that: The lower mold cavity block (2) is also provided with a flow channel regulating valve (31), the flow channel regulating valve (31) is slidably connected to the lower mold cavity block (2), one end of the flow channel regulating valve (31) passes through the guide channel (3) transversely, and the flow channel regulating valve (31) is provided with a guide groove. When the flow channel regulating valve (31) moves to the conducting position, the guide groove and the guide channel (3) are located at the same position; when the flow channel regulating valve (31) moves to the blocking position, the guide groove and the guide channel (3) are completely separated, and the flow channel regulating valve (31) is used to regulate the injection liquid flowing to the mold cavity one.

4. The thermistor injection mold according to claim 1, characterized in that: The upper mold structure also includes an upper mold fixing plate (4) and an upper mold panel (5), wherein the upper mold fixing plate (4) is fixedly connected to the upper mold panel (5), the upper mold cavity block (1) is embedded in the upper mold panel (5), and the lower end surface of the upper mold cavity block (1) is flush with the lower end surface of the upper mold panel (5), an injection tube (51) is embedded in the upper mold panel (5), the lower end of the injection tube (51) passes through the center position of the upper mold cavity block (1) and is communicated with the guide channel (3), and a guide groove (41) is opened on the upper mold fixing plate (4), and the lower end of the guide groove (41) is communicated with the upper end of the injection tube (51).

5. The thermistor injection mold according to claim 4, characterized in that: A retaining ring (42) is embedded on the upper die fixing plate (4), and the retaining ring (42) is fixed in the guide groove (41). The height of the upper end of the retaining ring (42) is higher than the height of the upper end surface of the upper die fixing plate (4).

6. The thermistor injection mold according to claim 5, characterized in that: The lower mold structure comprises a lower mold fixing plate (6), a lower mold supporting plate (7) and a lower mold panel (8); the lower mold supporting plate (7) is fixed to the upper end surface of the lower mold fixing plate (6); the lower mold panel (8) is fixed to the upper end of the lower mold supporting plate (7); the lower mold cavity block (2) is embedded in the lower mold panel (8), and the upper end surface of the lower mold cavity block (2) is flush with the upper end surface of the lower mold panel (8).

7. The thermistor injection mold according to claim 6, characterized in that: The lower mold panel (8) is provided with a plurality of positioning holes (81), and the lower end surface of the upper mold panel (5) is fixedly provided with a plurality of positioning columns (52), and the plurality of positioning columns (52) are plug-fitted with the plurality of positioning holes (81).

8. The thermistor injection mold according to claim 7, characterized in that: Both sides of the lower mold panel (8) are provided with positioning grooves (82), and the lower end surface of the upper mold panel (5) is fixedly provided with a positioning block (53), and the positioning block (53) is snap-connected with the positioning groove (82).

9. The thermistor injection mold according to claim 8, characterized in that: The lower end surface of the upper mold panel (5) is also fixed with a plurality of upper limit columns (54), and the corresponding positions of the upper end surface of the lower mold panel (8) are fixed with a plurality of lower limit columns (83), and the upper limit columns (54) and the lower limit columns (83) are abutted against each other to limit the closing distance between the upper mold structure and the lower mold structure.

Images