Terminal injection mold

Abstract

The terminal injection mold provided by the present invention can adapt to the injection molding of embedded terminals with complex structural designs by setting the mold core as a split upper mold core and a split lower mold core. By setting an upper limit pin between the left mold piece and the right mold piece of the upper mold core and a lower limit pin between the left clamping piece and the right clamping piece of the lower mold core, the terminal can be accurately positioned and the depth of the terminal inserted into the upper mold core and the lower mold core can be accurately controlled. By setting the upper mold core as a split design with a left mold piece and a right mold piece and by setting the lower mold core as a split design with a left clamping piece and a right clamping piece, the technical effect of convenient disassembly and assembly is achieved. By closing the left clamping piece and the right clamping piece and then inserting them into the mold core sleeve, the convenience of disassembling the terminal product after injection molding is further enhanced.

Description

Technical Field

[0001] The invention relates to the field of terminal manufacturing, and in particular to a terminal injection mold. Background Art

[0002] Terminals are components used to transmit electrical signals or conduct electricity. Due to their convenient connection performance, they are widely used in the connection of various electronic circuits. For example, a large number of terminals are used in automotive electronic products. With the development of automotive electronic products, terminal products formed by embedding copper terminals in plastic injection molding have gradually become mainstream. The excellent conductivity of copper terminals and the insulation of plastics make it possible to design and mold complex products. Embedded terminal injection molding parts are increasingly used in automotive electronic products. At the same time, automotive electronic products also have very strict functional requirements for embedded terminal injection molding parts, such as air tightness, resistance to electrical breakdown, cold and hot shock, etc. Traditional molds are difficult to adapt to the injection molding of embedded terminals with complex structural designs due to defects such as low positioning accuracy and inconvenient disassembly and assembly. There is an urgent need for a terminal injection mold with high positioning accuracy, convenient disassembly and assembly, and the ability to adapt to the injection molding of embedded terminals with complex structural designs. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a terminal injection mold for embedded terminal injection molding which has high positioning accuracy, is convenient for assembly and disassembly, and can adapt to complex structural designs.

[0004] To achieve the above object, the technical solution adopted by the present invention is a terminal injection mold, comprising:

[0005] An upper mold, wherein a first through hole is provided on the upper mold;

[0006] an upper mold core movably inserted into the first through hole;

[0007] A lower mold, wherein a second through hole is provided on the lower mold;

[0008] A lower mold core movably inserted into the second through hole;

[0009] The upper mold core comprises: a left mold piece, a right mold piece, and an upper limit pin. The right side surface of the left mold piece is provided with a first groove extending in the vertical direction and a second groove extending in the horizontal direction. The left side surface of the right mold piece is provided with a third groove extending in the vertical direction and a fourth groove extending in the horizontal direction. When the left mold piece and the right mold piece are molded together, a space for placing the upper part of the metal terminal is formed between the first groove and the third groove, and a space for placing the upper limit pin is formed between the second groove and the fourth groove. The upper limit pin is used to limit the length of the upper part of the metal terminal extending into the upper mold core.

[0010] The lower mold core comprises: a mold core sleeve, a left clamp, a right clamp, and a lower limit pin. The mold core sleeve is provided with a third through hole penetrating the mold core sleeve in the vertical direction. The right side surface of the left clamp is provided with a fifth groove extending in the vertical direction. The left side surface of the right clamp is provided with a sixth groove extending in the vertical direction and a seventh groove extending in the horizontal direction for placing the lower limit pin. The left clamp and the right clamp are inserted into the third through hole after being closed. A space for placing the lower part of the metal terminal is formed between the sixth groove and the seventh groove. The lower limit pin is used to limit the length of the lower part of the metal terminal extending into the lower mold core.

[0011] The bottom surface of the right mold piece is provided with a guide column extending downward, and the upper surface of the lower mold is also provided with a guide hole matching the guide column.

[0012] Preferably, the upper mold core further includes screws for locking the left mold piece and the right mold piece.

[0013] Further preferably, a spring is sleeved on the screw, and the spring is located between the right side surface of the left mold piece and the left side surface of the right mold piece.

[0014] Further preferably, a spring groove for accommodating the spring is also provided on the left side surface of the right mold piece.

[0015] Preferably, the upper portion of the outer surface of the upper mold core is inclined inwardly to form a guiding slope, and the guiding slope is used for guiding and positioning when the upper mold core is inserted into the first through hole.

[0016] Preferably, there are at least two guide posts, the diameters and / or cross-sectional shapes of the guide posts are different, and the guide holes are arranged in one-to-one correspondence with the guide posts.

[0017] Preferably, the lower end of the guide post is provided with an outer arc chamfer for facilitating the insertion of the guide post into the guide hole.

[0018] Further preferably, the outer surface of the guide column is connected to the outer arc chamfer via an outer transition surface, and the outer transition surface extends downwardly and inwardly.

[0019] Preferably, an inner arc chamfer is provided at the edge of the guide hole to facilitate the guide post to be inserted into the guide hole.

[0020] Further preferably, the inner wall of the guide hole is connected to the inner arc chamfer via an inner transition surface, and the inner transition surface extends upward and outward in an inclined manner.

[0021] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0022] The terminal injection mold provided by the present invention can adapt to the injection molding of embedded terminals with complex structural designs by setting the mold core as a split upper mold core and a split lower mold core. By setting an upper limit pin between the left mold piece and the right mold piece of the upper mold core and a lower limit pin between the left clamping piece and the right clamping piece of the lower mold core, the terminal can be accurately positioned and the depth of the terminal inserted into the upper mold core and the lower mold core can be accurately controlled. By setting the upper mold core as a split design with a left mold piece and a right mold piece and by setting the lower mold core as a split design with a left clamping piece and a right clamping piece, the technical effect of convenient disassembly and assembly is achieved. By closing the left clamping piece and the right clamping piece and then inserting them into the mold core sleeve, the convenience of disassembling the terminal product after injection molding is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the assembly of the present invention.

[0024] Figure 2 It is a three-dimensional schematic diagram of the upper mold core in the present invention.

[0025] Figure 3 It is a bottom view schematic diagram of the upper mold core in the present invention.

[0026] Figure 4 for Figure 3 Schematic cross-sectional view along the AA direction.

[0027] Figure 5 It is a right-side stereoscopic schematic diagram of the right mold piece in the present invention.

[0028] Figure 6 It is a left-side stereoscopic schematic diagram of the right mold piece in the present invention.

[0029] Figure 7 It is a right-side stereoscopic schematic diagram of the left mold piece in the present invention.

[0030] Figure 8 It is a bottom view schematic diagram of the present invention.

[0031] Fig. 9 for Figure 8 Schematic cross-sectional view along the BB direction.

[0032] Fig.10 It is a bottom view schematic diagram of the lower mold core and the lower mold after they are matched in the present invention.

[0033] Fig.11 for Fig.10 Schematic cross-sectional view in the CC direction.

[0034] Fig.12 for Fig.11 A partial enlarged view of point D in the middle.

[0035] Wherein: 10. upper mold; 101. first through hole; 20. upper mold core; 201. left mold piece; 2011. right side; 2012. first groove; 2013. second groove; 202. right mold piece; 2021. left side; 2022. third groove; 2023. fourth groove; 2024. spring groove; 203. upper limit pin; 204. screw; 205. spring; 206. first guide column; 2061. first outer arc chamfer; 2062. first outer transition surface; 2063. outer surface; 207. second guide column; 2071. second outer arc chamfer; 2072 .Second outer transition surface; 2073. Outer surface; 208. Guide slope; 30. Lower mold; 301. Second through hole; 302. First guide hole; 3021. First inner arc chamfer; 3022. First inner transition surface; 3023. Inner wall; 303. Second guide hole; 3031. Second inner arc chamfer; 40. Lower mold core; 401. Core sleeve; 4011. Third through hole; 402. Left clamp; 4021. Right side; 4022. Fifth groove; 403. Right clamp; 4032. Sixth groove; 4033. Seventh groove; 404. Lower limit pin; 50. Copper terminal. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0037] The left and right directions described in the present invention are Figure 1 The left and right directions in the present invention refer to the up and down directions. Figure 1 The up and down directions in .

[0038] like Figure 1-12 As shown, the terminal injection mold provided by the present invention includes: an upper mold 10, an upper mold core 20, a lower mold 30, and a lower mold core 40, wherein the upper mold 10 is provided with a first through hole 101, and the upper mold core 20 can be inserted in the first through hole 101 movably up and down, and the lower mold 30 is provided with a second through hole 301, and the lower mold core 40 can be inserted in the second through hole 301 movably up and down, and when the upper mold 10 and the lower mold 40 are closed, the lower surface of the upper mold 10 and the upper surface of the lower mold 40 are fitted together, the upper mold core 20 is fixed in the first through hole 101, and the lower mold core 40 is inserted in the second through hole 301.

[0039] like Figure 1-7As shown, the upper mold core 20 includes: a left mold piece 201, a right mold piece 202, and an upper limit pin 203, wherein the right side 2011 of the left mold piece 201 is provided with a first groove 2012 extending in the vertical direction and penetrating the upper and lower surfaces of the left mold piece 201, and a second groove 2013 extending in the horizontal direction and penetrating the left and right sides of the left mold piece 201, and the left side 2021 of the right mold piece 202 is provided with a third groove 2022 extending in the vertical direction and penetrating the upper and lower surfaces of the right mold piece 202, and a third groove 2023 extending in the horizontal direction and penetrating the left and right sides of the left mold piece 201. The fourth groove 2023 extends outward, and when the left mold piece 201 and the right mold piece 202 are molded together, the left mold piece 201 is embedded in the right mold piece 202, and a space for placing the upper part of the copper terminal 50 is formed between the first groove 2012 and the third groove 2022, and a space for placing the upper limit pin 203 is formed between the second groove 2013 and the fourth groove 2023. The lower surface of the upper limit pin 203 presses against the upper end surface of the copper terminal 50, and the upper limit pin 203 is used to limit the length of the upper part of the copper terminal extending into the upper mold core 20.

[0040] like Figure 1 As shown, the lower mold core 40 includes: a mold core sleeve 401, a left clamping piece 402, a right clamping piece 403, and a lower limit pin 404, wherein the mold core sleeve 401 is provided with a third through hole 4011 penetrating the mold core sleeve 401 in the vertical direction, the right side surface 4021 of the left clamping piece 402 is provided with a fifth groove 4022 extending in the vertical direction and penetrating the upper and lower surfaces of the left clamping piece 402, and the left side surface of the right clamping piece 403 is provided with a sixth groove 4022 extending in the vertical direction and penetrating the upper and lower surfaces of the right clamping piece 403. 032. The seventh groove 4033 for placing the lower limit pin 404 extends in the horizontal direction and passes through the left and right sides of the right clamp 403. After the left clamp 402 and the right clamp 403 are closed, they are inserted into the third through hole 4011. A space for placing the lower part of the copper terminal 50 is formed between the sixth groove 4032 and the seventh groove 4033. The upper surface of the lower limit pin 404 supports the lower end surface of the copper terminal 50. The lower limit pin 404 is used to limit the length of the lower part of the copper terminal 50 extending into the lower mold core 40.

[0041] like Figure 3-7As shown, the upper mold core 20 also includes a screw 204 for locking the left mold piece 201 and the right mold piece 202. The screw rod of the screw 204 passes through the countersunk hole on the right mold piece 202 and is tightened in the internal threaded hole on the left mold piece 201. The screw head of the screw 204 sinks into the countersunk hole to lock the left mold piece 201 and the right mold piece 202. A spring 205 is also sleeved on the screw rod of the screw 204. The spring 205 is located on the right side 201 of the left mold piece 201. 1 and the left side surface 2021 of the right mold piece 202, when the screw 204 is tightened, the spring 205 is in a compressed state, and the spring 205 has a tendency to drive the left mold piece 201 and the right mold piece 202 to separate. A spring groove 2024 for accommodating the spring 205 is also provided on the left side surface 2021 of the right mold piece 202, so that when the screw 204 is loosened, the spring 205 can drive the left mold piece 201 and the right mold piece 202 to separate in the horizontal direction.

[0042] like Figure 1 As shown, the bottom surface of the right mold piece 202 is provided with a first guide column 206 and a second guide column 207 extending downward, the cross-sections of the first guide column 206 and the second guide column 207 are both circular, the diameter of the first guide column 206 is half of the diameter of the second guide column 207, and the upper surface of the lower mold 30 is also provided with guide holes corresponding to the above-mentioned guide columns one by one. The above-mentioned one-to-one correspondence means that the upper surface of the lower mold 30 is provided with a first guide hole 302 matching the first guide column 206 and a second guide hole 303 matching the second guide column 207, and the second guide column 207 can only be inserted into the second guide hole 303, which can prevent the lower mold core 40 from being reversely inserted on the lower mold 30 to achieve the anti-foolproof function. Of course, the anti-foolproof function can also be achieved by designing the cross-sections of the first guide column 206 and the second guide column 207 into different shapes.

[0043] In this embodiment, except for the different diameters, the first guide column 206 and the second guide column 207 have the same specific structure and the matching structure with the guide hole. The first guide column 206 and the first guide hole 302 are used as an example for description below.

[0044] like Figure 1-12As shown, the lower end of the first guide column 206 is provided with a first outer arc chamfer 2061 protruding outward for facilitating the first guide column 206 to be inserted into the first guide hole 302, the outer surface 2063 of the first guide column 206 is connected to the first outer arc chamfer 2061 through a first outer transition surface 2062, the first outer transition surface 2062 extends downwardly and inwardly obliquely, and the edge of the first guide hole 302 is provided with a first inner arc chamfer 3021 protruding inward for facilitating the first guide column 206 to be inserted into the first guide hole 302, the inner wall 3023 of the first guide hole 302 is connected to the first inner arc chamfer 3021 through the first inner transition surface 3022, and the first inner transition surface 3022 extends upwardly and outwardly. It extends obliquely, and when the first guide column 206 is inserted into the first guide hole 302, the first outer transition surface 2062 fits with the first inner transition surface 3022, thereby achieving the technical effect of guiding and accurately positioning the upper mold core 20 when it is inserted into the lower mold 40. Since the upper part of the outer surface of the upper mold core 20 is provided with a guiding inclined surface 208 inclined toward the inside of the upper mold core 20, the upper mold core 20 can be guided and accurately positioned by the guiding inclined surface 208 when inserted into the first through hole 101, and the lower mold core 40 is inserted in the second through hole 301, thereby achieving accurate positioning of the upper mold 10, the upper mold core 20, the lower mold 30, and the lower mold core 40, so that the copper terminal 50 can be accurately positioned in the terminal injection mold.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A terminal injection mold, comprising: An upper mold, wherein a first through hole is provided on the upper mold; an upper mold core movably inserted into the first through hole; A lower mold, wherein a second through hole is provided on the lower mold; A lower mold core movably inserted into the second through hole; Features: The upper mold core comprises: a left mold piece, a right mold piece, and an upper limit pin. The right side surface of the left mold piece is provided with a first groove extending in the vertical direction and a second groove extending in the horizontal direction. The left side surface of the right mold piece is provided with a third groove extending in the vertical direction and a fourth groove extending in the horizontal direction. When the left mold piece and the right mold piece are molded together, a space for placing the upper part of the metal terminal is formed between the first groove and the third groove, and a space for placing the upper limit pin is formed between the second groove and the fourth groove. The upper limit pin is used to limit the length of the upper part of the metal terminal extending into the upper mold core. The lower mold core comprises: a mold core sleeve, a left clamp, a right clamp, and a lower limit pin. The mold core sleeve is provided with a third through hole penetrating the mold core sleeve in the vertical direction. The right side surface of the left clamp is provided with a fifth groove extending in the vertical direction. The left side surface of the right clamp is provided with a sixth groove extending in the vertical direction and a seventh groove extending in the horizontal direction for placing the lower limit pin. The left clamp and the right clamp are inserted into the third through hole after being closed. A space for placing the lower part of the metal terminal is formed between the sixth groove and the seventh groove. The lower limit pin is used to limit the length of the lower part of the metal terminal extending into the lower mold core. The bottom surface of the right mold piece is provided with a guide column extending downward, and the upper surface of the lower mold is also provided with a guide hole matching the guide column; The upper mold core also includes screws for locking the left mold piece and the right mold piece; The upper portion of the outer surface of the upper mold core is inclined inwardly to form a guiding slope, and the guiding slope is used for guiding and positioning when the upper mold core is inserted into the first through hole.

2. The terminal injection mold according to claim 1, characterized in that: A spring is sleeved on the screw, and the spring is located between the right side surface of the left mold piece and the left side surface of the right mold piece.

3. The terminal injection mold according to claim 2, characterized in that: A spring groove for accommodating the spring is also provided on the left side surface of the right mold piece.

4. The terminal injection mold according to claim 1, characterized in that: There are at least two guide posts, the diameters and / or cross-sectional shapes of the guide posts are different, and the guide holes are arranged in one-to-one correspondence with the guide posts.

5. The terminal injection mold according to claim 1, characterized in that: The lower end of the guide post is provided with an outer arc chamfer for facilitating the insertion of the guide post into the guide hole.

6. The terminal injection mold according to claim 5, characterized in that: The outer surface of the guide column is connected to the outer arc chamfer through an outer transition surface, and the outer transition surface extends downward and inwardly.

7. The terminal injection mold according to claim 1, characterized in that: An inner arc chamfer is arranged at the edge of the guide hole to facilitate the guide post to be inserted into the guide hole.

8. The terminal injection mold according to claim 7, characterized in that: The inner wall of the guide hole is connected to the inner arc chamfer via an inner transition surface, and the inner transition surface extends upward and outward in an inclined manner.

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