Injection mold and injection molding method for a copper bush insert product

Abstract

The application discloses an injection mold for a copper sleeve embedded product and an injection production method, and the injection mold comprises an upper mold and a lower mold, the upper mold is provided with an upper mold insert, the lower mold is provided with a lower mold insert, a slider insert is arranged between the upper mold insert and the lower mold insert, the lower mold is provided with a floating positioning column penetrating through the lower mold insert, the end of the floating positioning column is provided with a positioning head for sleeving the copper sleeve, a spring needle positioning mechanism is arranged on one side of the floating positioning column, and the floating positioning column is provided with a floating core pulling mechanism. The floating core pulling mechanism is used for driving the floating positioning column to upwardly press and move together with the copper sleeve, even if the thickness tolerance of the copper sleeve is different, the copper sleeve can be tightly attached to the bottom surface of the slider insert, there is no gap in the injection process, the situation that flash or glue overflow is avoided, and the situation that the slider insert is rubbed or even collided with the copper sleeve in the movement process is avoided, so that the production stability of the product is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molding, and particularly relates to an injection mold and an injection molding production method for a copper sleeve insert product. BACKGROUND

[0002] The copper sleeve is often molded together with the plastic in the embedded injection mold to form a copper sleeve insert product. Figure 1 As shown in the copper sleeve insert product, due to the limitation of the product structure, the slide block insert is needed to be molded when the injection mold is designed, the copper sleeve is located below the slide block insert, and the conventional injection molding method has the following defects:

[0003] 1. If the copper sleeve thickness size tolerance band is small, the slide block insert bottom surface is easy to rub against the copper sleeve, which can scratch out metal chips and enter the product in the injection molding process, causing product defects; and when the slide block insert bottom surface rubs against the copper sleeve, the copper sleeve rubbing surface can be scratched, causing product defects;

[0004] 2. If the copper sleeve thickness size tolerance band is large, when the copper sleeve thickness is lower than the design theoretical value, the copper sleeve position can produce flash or overflow glue and the like in the injection molding process, causing defective products; when the copper sleeve thickness is higher than the design theoretical size, the copper sleeve is high, and the slide block insert can hit the high part of the copper sleeve when the mold is closed, causing part damage or copper sleeve damage.

[0005] Due to the above reasons, the product production is greatly disturbed, and therefore the injection mold and the injection molding production method for the copper sleeve insert product are proposed to solve the problems in the prior art. SUMMARY

[0006] The purpose of the present application is to provide an injection mold and an injection molding production method for a copper sleeve insert product to solve the above problems in the prior art.

[0007] In order to achieve the above purpose, in the first aspect, the present application adopts the following technical scheme: an injection mold for a copper sleeve insert product, comprising an upper mold and a lower mold, the upper mold is provided with an upper mold insert, the lower mold is provided with a lower mold insert, a slide block insert is arranged between the upper mold insert and the lower mold insert, the lower mold is provided with a floating positioning column penetrating through the lower mold insert, the end of the floating positioning column is provided with a positioning head for sleeving the copper sleeve, one side of the floating positioning column is provided with a needle positioning mechanism, the needle positioning mechanism is used for positioning the copper sleeve on the positioning head when the mold is opened; the floating positioning column is provided with a floating core pulling mechanism, the floating core pulling mechanism is used for driving the floating positioning column to move upward when the mold is closed, so that the copper sleeve is separated from the constraint of the needle positioning mechanism and approaches the slide block insert.

[0008] As an optional implementation form of the above technical solution, the floating core pulling mechanism comprises a floating seat, a core pulling bent pin and a core pulling driving assembly, the floating seat is slidingly arranged in the inner side of the lower mold, the floating seat is connected with the floating positioning column, the floating seat is provided with an inclined guide hole matched with the core pulling bent pin, the core pulling driving assembly is connected with the core pulling bent pin, and the core pulling driving assembly is used for driving the floating seat to ascend and descend through the core pulling bent pin, so as to control the ascending and descending of the floating positioning column.

[0009] As an optional implementation form of the above technical solution, the core pulling driving assembly comprises a driving cylinder and a core pulling seat, the movable end of the driving cylinder is connected with the core pulling seat, and a plurality of core pulling bent pins are arranged on the core pulling seat.

[0010] As an optional implementation form of the above technical solution, the upper mold insert is provided with an upper positioning column, the sliding block insert is provided with a positioning hole, and one end of the upper positioning column is in contact with the copper sleeve after penetrating through the positioning hole.

[0011] As an optional implementation form of the above technical solution, the outer diameter of the positioning head matches the inner diameter of the copper sleeve, and the end of the positioning head can penetrate through the copper sleeve and extend into the inside of the upper positioning column.

[0012] As an optional implementation form of the above technical solution, a floating gap is left between the core pulling bent pin and the inclined guide hole, the floating seat is provided with an elastic top driving piece, and the elastic top driving piece is used for driving the floating seat to move upward with the floating positioning column, so that the copper sleeve is kept in close contact with the sliding block insert or the upper positioning column.

[0013] As an optional implementation form of the above technical solution, the elastic top driving piece comprises a top driving spring, and the top driving spring is arranged at the bottom of the floating seat.

[0014] As an optional implementation form of the above technical solution, the inner side of the lower mold is provided with a supporting and limiting table, and the supporting and limiting table is used for supporting and limiting the end of the core pulling bent pin.

[0015] As an optional implementation form of the above technical solution, the supporting and limiting table is in an L-shaped structure.

[0016] As an optional implementation form of the above technical solution, the elastic pin positioning mechanism comprises an elastic pin, a pin seat and a positioning spring, one end of the elastic pin is connected with the pin seat, the lower mold insert is provided with a sliding groove, the pin seat and the positioning spring are arranged in the sliding groove, and the positioning spring is used for driving the pin seat to move close to the floating positioning column with the elastic pin, so that the elastic pin is inserted into the annular groove in the side wall of the copper sleeve to realize the pre-positioning function of the copper sleeve.

[0017] In the second aspect, the present application adopts the following technical solution: an injection molding production method of a copper sleeve insert product, which adopts the injection mold described above, and the injection molding production method comprises the following steps:

[0018] Step A: the upper mold and the lower mold are opened, the floating core pulling mechanism drives the floating positioning column and the positioning head to move downward together by a distance, so that the side wall of the positioning head approaches the needle positioning mechanism;

[0019] Step B: the copper sleeve is placed on the positioning head, the needle positioning mechanism is used to position the copper sleeve on the positioning head, so as to avoid upward movement of the copper sleeve and realize the pre-positioning function of the copper sleeve;

[0020] Step C: the upper mold and the lower mold are closed, the slider insert moves above the copper sleeve and is fixed;

[0021] Step D: the floating core pulling mechanism drives the floating positioning column and the positioning head to move upward together by a distance, so that the copper sleeve is out of the constraint of the needle positioning mechanism and moves upward and contacts the slider insert or the upper positioning column;

[0022] Step E: after injection, pressure maintaining and cooling, the floating core pulling mechanism drives the floating positioning column and the positioning head to move downward together by a distance, the copper sleeve is left on the plastic, and the copper sleeve insert product is obtained after the upper mold and the lower mold are opened.

[0023] As an optional implementation form of the above technical solution, in step A, the floating core pulling mechanism drives the floating positioning column and the positioning head to move downward together by a distance, so that the side wall of the positioning head approaches the needle positioning mechanism, including: the driving cylinder drives the core pulling seat to retreat, the core pulling seat drives the core pulling bent pin to retreat, the core pulling bent pin gradually exits the inclined guide hole and drives the floating seat and the floating positioning column to move downward together by a distance, so that the side wall of the positioning head approaches the needle;

[0024] In step B, the needle positioning mechanism is used to position the copper sleeve on the positioning head, including: the positioning spring drives the needle seat and the needle to move laterally, so that one end of the needle is clamped in the annular groove of the side wall of the copper sleeve;

[0025] In step D, the floating core pulling mechanism drives the floating positioning column and the positioning head to move upward together by a distance, so that the copper sleeve is out of the constraint of the needle positioning mechanism and moves upward and contacts the upper positioning column, including: the driving cylinder drives the core pulling seat to advance, the core pulling seat drives the core pulling bent pin to advance, the core pulling bent pin gradually inserts into the inclined guide hole and drives the floating seat and the floating positioning column to move upward together by a distance, so that the copper sleeve is out of the constraint of the needle and moves upward and contacts the end of the upper positioning column; the top driving spring drives the floating positioning column and the positioning head to press upward together, so that the copper sleeve is in close contact with the upper positioning column;

[0026] In step E, the floating core pulling mechanism drives the floating positioning column and the positioning head to move downward together by a distance, including: the driving cylinder drives the core pulling seat to retreat, the core pulling seat drives the core pulling bent pin to retreat, the core pulling bent pin gradually exits the inclined guide hole and drives the floating seat and the floating positioning column to move downward together by a distance.

[0027] The present application has the following advantages:

[0028] The present application drives the floating positioning column with the copper sleeve to move upwards by using the floating core pulling mechanism, so that the copper sleeve can be tightly attached to the bottom surface of the slider insert even if there is a difference in the thickness tolerance of the copper sleeve, and there is no gap during the injection molding process, thereby avoiding the generation of flash or overflow of glue, and the slider insert will not rub or even collide with the copper sleeve during the movement, thereby ensuring the production stability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of a copper sleeve insert product in an embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of an injection mold in an embodiment of the present application;

[0031] Figure 3 is a structural schematic diagram of a lower mold in an embodiment of the present application;

[0032] Figure 4 is a layout structural schematic diagram of an upper mold insert, a slider insert and a floating core pulling mechanism in an embodiment of the present application;

[0033] Figure 5 is a layout structural schematic diagram of an upper mold insert, a lower mold insert and a slider insert in an embodiment of the present application;

[0034] Figure 6 is a cross-sectional structural schematic diagram of an upper mold insert, a lower mold insert and a slider insert in an embodiment of the present application;

[0035] Figure 7 is a structural schematic diagram of a floating positioning column and an upper positioning column in an embodiment of the present application;

[0036] Figure 8 is a structural schematic diagram of a floating core pulling mechanism in an embodiment of the present application.

[0037] In the figure: 1-upper mold; 2-lower mold; 3-upper mold insert; 4-lower mold insert; 5-slider insert; 6-floating positioning column; 7-positioning head; 8-floating seat; 9-core pulling bent pin; 10-driving air cylinder; 11-core pulling seat; 12-upper positioning column; 13-top driving spring; 14-supporting limiting table; 15-spring needle; 16-needle seat; 17-positioning spring; 18-copper sleeve; 19-copper sleeve insert product. DETAILED DESCRIPTION

[0038] As shown in Figures 2-8 , the present embodiment provides an injection mold for a copper sleeve insert product, which is used for producing a copper sleeve insert product as shown in Figure 1The copper sleeve insert product is shown. As Figures 2-6 The injection mold shown includes an upper mold 1 and a lower mold 2, the upper mold 1 is provided with an upper mold insert 3, the lower mold 2 is provided with a lower mold insert 4, and the upper mold insert 3 and the lower mold insert 4 are provided with two slider inserts 5, which can move forward and backward to form the product. The lower mold 2 is provided with a floating positioning column 6 penetrating through the lower mold insert 4, the end of the floating positioning column 6 is provided with a positioning head 7 for sleeving the copper sleeve 18, one side of the floating positioning column 6 is provided with a spring needle positioning mechanism for positioning the copper sleeve 18 on the positioning head 7 when the mold is opened; the floating positioning column 6 is provided with a floating core pulling mechanism, which is used to drive the floating positioning column 6 to move upward when the mold is closed, so that the copper sleeve 18 is released from the constraint of the spring needle positioning mechanism and approaches the slider insert 5.

[0039] After the mold is opened, the floating core pulling mechanism first drives the floating positioning column 6 to move downward by a distance, then the copper sleeve 18 is placed on the positioning head 7, and the copper sleeve 18 is pre-positioned by the spring needle positioning mechanism to avoid upward movement of the copper sleeve 18; after the mold is closed, the slider insert 5 moves above the copper sleeve 18, and the floating core pulling mechanism drives the floating positioning column 6 to move upward by a distance, so that the copper sleeve 18 is released from the constraint of the spring needle positioning mechanism, and the copper sleeve 18 continues to move upward and contacts the bottom surface of the slider insert 5.

[0040] The present application uses the floating core pulling mechanism to drive the floating positioning column 6 to press the copper sleeve 18 upward, even if there is a difference in the thickness tolerance of the copper sleeve 18, the copper sleeve 18 can be tightly attached to the bottom surface of the slider insert 5, there is no gap during the injection molding process, avoiding the generation of flash or overflow of the product, and the slider insert 5 will not rub or even collide with the copper sleeve 18 during the movement process, ensuring the production stability of the product.

[0041] The injection molding method of the copper sleeve insert product 19 includes the following steps:

[0042] Step A: the upper mold 1 and the lower mold 2 are opened, the floating core pulling mechanism drives the floating positioning column 6 and the positioning head 7 to move downward by a distance, so that the side wall of the positioning head 7 approaches the spring needle positioning mechanism;

[0043] Step B: place the copper sleeve 18 on the positioning head 7, and use the spring needle positioning mechanism to position the copper sleeve 18 on the positioning head 7 to avoid upward movement of the copper sleeve 18, realizing the pre-positioning function of the copper sleeve 18;

[0044] Step C: the upper mold 1 and the lower mold 2 are closed, and the slider insert 5 moves above the copper sleeve 18 and remains fixed;

[0045] Step D: The floating core mechanism drives the floating positioning column 6 and the positioning head 7 to move upward together for a distance, so that the copper sleeve 18 is out of the constraint of the needle positioning mechanism, and the copper sleeve 18 moves upward and contacts the slider insert 5; the elastic top driving part drives the floating positioning column 6 and the positioning head 7 to move upward together, so that the copper sleeve 18 is kept in close contact with the slider insert 5.

[0046] Step E: After the injection, pressure maintaining and cooling, the floating core mechanism drives the floating positioning column 6 and the positioning head 7 to move downward together for a distance, so that the copper sleeve 18 is left on the plastic, and the upper mold 1 and the lower mold 2 are opened to obtain the copper sleeve insert product 19.

[0047] In the embodiment, as shown in the figure, Figure 8 the floating core mechanism includes a floating seat 8, a core pulling bent pin 9 and a core pulling driving assembly, the floating seat 8 is slidably arranged inside the lower mold 2, the floating seat 8 is connected with the floating positioning column 6, the floating seat 8 is provided with a slant guide hole matched with the core pulling bent pin 9, the core pulling driving assembly is connected with the core pulling bent pin 9, and the core pulling driving assembly is used to drive the floating seat 8 to move up and down through the core pulling bent pin 9, so as to control the up and down movement of the floating positioning column 6. Specifically, the core pulling driving assembly includes a driving cylinder 10 and a core pulling seat 11, the movable end of the driving cylinder 10 is connected with the core pulling seat 11, and the core pulling seat 11 is provided with a plurality of core pulling bent pins 9. The driving cylinder 10 drives the core pulling seat 11 to move forward and backward with the core pulling bent pins 9, the core pulling bent pins 9 control the floating seat 8 to move up and down through the slant guide hole, and the up and down movement of the floating positioning column 6 is realized.

[0048] In the embodiment, as shown in the figure, Figure 6 the needle positioning mechanism includes a needle 15, a needle seat 16 and a positioning spring 17, one end of the needle 15 is connected with the needle seat 16, the lower mold insert 4 is provided with a sliding groove, the needle seat 16 and the positioning spring 17 are arranged in the sliding groove, and the positioning spring 17 is used to drive the needle seat 16 to move close to the floating positioning column 6 with the needle 15, so that the needle 15 is inserted into the annular groove in the side wall of the copper sleeve 18 to realize the pre-positioning function of the copper sleeve 18. The needle 15 can move left and right, and under the action of the positioning spring 17, the needle 15 can be inserted into the annular groove in the side wall of the copper sleeve 18 to realize the pre-positioning function of the copper sleeve 18.

[0049] In a specific embodiment, as shown in the figure, Figure 7 in order to reduce the contact between the copper sleeve 18 and the slider insert 5, the upper mold insert 3 is provided with an upper positioning column 12, the slider insert 5 is provided with a positioning hole, and one end of the upper positioning column 12 passes through the positioning hole and contacts the copper sleeve 18. Preferably, the outer diameter of the positioning head 7 matches the inner diameter of the copper sleeve 18, and the end of the positioning head 7 can pass through the copper sleeve 18 and extend into the inside of the upper positioning column 12. The copper sleeve 18 is in close contact with the upper positioning column 12, and even if there is a difference in the thickness tolerance of the copper sleeve 18, there will be no flash, glue overflow and friction or even collision, which ensures the product quality.

[0050] In a specific embodiment, a floating gap is left between the core-pulling bent pin 9 and the inclined guide hole, and the floating seat 8 is provided with an elastic top driving piece for driving the floating seat 8 to move upward with the floating positioning column 6, so that the copper sleeve 18 is kept in close contact with the upper positioning column 12. Specifically, as shown in the figure, the elastic top driving piece includes a top driving spring 13 arranged at the bottom of the floating seat 8. The inside of the lower mold 2 is provided with a supporting and limiting table 14 for supporting and limiting the end of the core-pulling bent pin 9, and the supporting and limiting table 14 has an L-shaped structure. After the copper sleeve 18 contacts with the sliding block insert 5 or the upper positioning column 12, the top driving spring 13 is used to drive the copper sleeve 18 to tightly press the sliding block insert 5 or the upper positioning column 12, so as to ensure the product production quality. Figure 7

[0051] The embodiment also provides an injection molding production method of the copper sleeve insert product, and the injection molding production method comprises the following steps:

[0052] Step A: the upper mold 1 and the lower mold 2 are opened, the driving cylinder 10 drives the core-pulling seat 11 to retreat, the core-pulling seat 11 drives the core-pulling bent pin 9 to retreat, the core-pulling bent pin 9 gradually exits the inclined guide hole and drives the floating seat 8 and the floating positioning column 6 to move downward by a distance, so that the side wall of the positioning head 7 is close to the elastic needle 15;

[0053] Step B: the copper sleeve 18 is placed on the positioning head 7 at the top of the floating positioning column 6, the needle seat 16 and the elastic needle 15 move transversely under the action of the positioning spring 17, so that one end of the elastic needle 15 is clamped in the annular groove in the side wall of the copper sleeve 18, the upward movement of the copper sleeve 18 is avoided, and the pre-positioning function of the copper sleeve 18 is realized;

[0054] Step C: the upper mold 1 and the lower mold 2 are closed, the sliding block insert 5 moves above the copper sleeve 18 and keeps fixed, and one end of the upper positioning column 12 penetrates through the sliding block insert 5 and is opposite to the copper sleeve 18;

[0055] Step D: the driving cylinder 10 drives the core-pulling seat 11 to advance, the core-pulling seat 11 drives the core-pulling bent pin 9 to advance, the core-pulling bent pin 9 gradually inserts into the inclined guide hole and drives the floating seat 8 and the floating positioning column 6 to move upward by a distance, so that the copper sleeve 18 is separated from the constraint of the elastic needle 15, the copper sleeve 18 moves upward and contacts with the end of the upper positioning column 12; the top driving spring 13 drives the floating positioning column 6 and the positioning head 7 to move upward and press, so that the copper sleeve 18 is kept in close contact with the upper positioning column 12;

[0056] Step E: after injection, pressure maintaining and cooling, the driving cylinder 10 drives the core-pulling seat 11 to retreat, the core-pulling seat 11 drives the core-pulling bent pin 9 to retreat, the core-pulling bent pin 9 gradually exits the inclined guide hole and drives the floating seat 8 and the floating positioning column 6 to move downward by a distance, and the copper sleeve 18 is left on the plastic, and the upper mold 1 and the lower mold 2 are opened to obtain the copper sleeve insert product 19. ​

[0057] Compared with the prior art, the present application has the following advantages:

[0058] 1. The mold structure is compact and reasonable in design, and is convenient to use.

[0059] 2. By increasing the implantation of the needle positioning mechanism, the copper sleeve 18 can be accurately positioned in the mold during the rotation cycle and the mold closing process of the mold rear mold.

[0060] 3. By increasing the timing movement of the implanted floating positioning column 6, it can be ensured that the copper sleeve 18 is kept away from the related parts during mold closing, and the slider insert 5 will not rub or even collide with the copper sleeve 18 during the movement process, which will cause various product defects or mold damage, and ensure the production stability.

[0061] In the description of the present application, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, which can be fixed connection, detachable connection, or integrated; can be mechanical connection or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements; for those skilled in the art, the specific meaning of the above terms in the present application can be understood. In addition, the specific features, structures and the like described in the embodiments are included in at least one embodiment, and those skilled in the art can combine the features of different embodiments without mutual contradiction. The protection scope of the present application is not limited to the above specific embodiments, according to the basic technical concept of the present application, those skilled in the art can easily think of the embodiments without creative labor, which are all within the protection scope of the present application.

Claims

1. An injection mold for a copper bush insert product, comprising an upper mold (1) and a lower mold (2), the upper mold (1) being provided with an upper mold insert (3), the lower mold (2) being provided with a lower mold insert (4), a slide insert (5) being provided between the upper mold insert (3) and the lower mold insert (4), characterized in that The lower mold (2) is provided with a floating positioning column (6) penetrating the lower mold insert (4), the end of the floating positioning column (6) is provided with a positioning head (7) for sleeving a copper sleeve (18), one side of the floating positioning column (6) is provided with a spring needle positioning mechanism, the spring needle positioning mechanism is used for positioning the copper sleeve (18) on the positioning head (7) when the mold is opened; the floating positioning column (6) is provided with a floating core pulling mechanism, the floating core pulling mechanism is used for driving the floating positioning column (6) to move upward when the mold is closed, so that the copper sleeve (18) is released from the constraint of the spring needle positioning mechanism and is close to the slider insert (5); The floating core pulling mechanism comprises a floating seat (8), a core pulling bent pin (9) and a core pulling driving assembly, the floating seat (8) is slidably arranged in the inner side of the lower mold (2), the floating seat (8) is connected with the floating positioning column (6), the floating seat (8) is provided with an inclined guide hole matched with the core pulling bent pin (9), the core pulling driving assembly is connected with the core pulling bent pin (9), and the core pulling driving assembly is used for driving the floating seat (8) to move up and down through the core pulling bent pin (9), so as to control the up and down movement of the floating positioning column (6); The core pulling bent pin (9) and the inclined guide hole are left with a floating gap, the floating seat (8) is provided with an elastic top driving piece, the elastic top driving piece is used for driving the floating seat (8) to move upward with the floating positioning column (6), so that the copper sleeve (18) is kept in close contact with the slider insert (5) or the upper positioning column (12); The elastic top driving piece comprises a top driving spring (13), and the top driving spring (13) is arranged at the bottom of the floating seat (8); The spring needle positioning mechanism comprises a spring needle (15), a needle seat (16) and a positioning spring (17), one end of the spring needle (15) is connected with the needle seat (16), the lower mold insert (4) is provided with a sliding groove, the needle seat (16) and the positioning spring (17) are arranged in the sliding groove, and the positioning spring (17) is used for driving the needle seat (16) to move close to the floating positioning column (6) with the spring needle (15), so that the spring needle (15) is inserted into the annular groove in the side wall of the copper sleeve (18) to realize the pre-positioning function of the copper sleeve (18).

2. The injection mold for a copper-inlay product of claim 1, wherein, The core pulling driving assembly comprises a driving air cylinder (10) and a core pulling seat (11), the movable end of the driving air cylinder (10) is connected with the core pulling seat (11), and a plurality of core pulling bent pins (9) are arranged on the core pulling seat (11).

3. The injection mold for a copper-inlay product of claim 1, wherein, The upper mold insert (3) is provided with an upper positioning column (12), the slider insert (5) is provided with a positioning hole, one end of the upper positioning column (12) penetrates through the positioning hole and contacts the copper sleeve (18); the outer diameter of the positioning head (7) matches the inner diameter of the copper sleeve (18), and the end of the positioning head (7) can penetrate through the copper sleeve (18) and extend into the upper positioning column (12).

4. The injection mold for a copper-inlay product of claim 1, wherein, The inner side of the lower mold (2) is provided with a supporting limiting table (14), the supporting limiting table (14) is used for supporting and limiting the end of the core pulling bent pin (9); the supporting limiting table (14) has an L-shaped structure.

5. A method of injection molding a copper-inlay product, characterized in that, The injection molding method comprises the following steps: The injection molding method comprises the following steps: Step A: the upper mold (1) and the lower mold (2) are opened, the floating core pulling mechanism drives the floating positioning column (6) and the positioning head (7) to move downward together by a distance, so that the side wall of the positioning head (7) approaches the needle positioning mechanism; Step B: the copper sleeve (18) is placed on the positioning head (7), and the copper sleeve (18) is positioned on the positioning head (7) by the needle positioning mechanism, so as to avoid upward movement of the copper sleeve (18) and realize the pre-positioning function of the copper sleeve (18); Step C: the upper mold (1) and the lower mold (2) are closed, and the slider insert (5) moves above the copper sleeve (18) and remains fixed; Step D: the floating core pulling mechanism drives the floating positioning column (6) and the positioning head (7) to move upward together by a distance, so that the copper sleeve (18) is released from the constraint of the needle positioning mechanism, and the copper sleeve (18) moves upward and contacts the slider insert (5) or the upper positioning column (12); Step E: after injection, pressure maintaining and cooling, the floating core pulling mechanism drives the floating positioning column (6) and the positioning head (7) to move downward together by a distance, and the copper sleeve (18) is left on the plastic, and the copper sleeve insert product (19) is obtained after the upper mold (1) and the lower mold (2) are opened.

6. The injection molding production method of the copper sleeve insert product according to claim 5, characterized in that, in step A, the floating core pulling mechanism drives the floating positioning column (6) and the positioning head (7) to move downward together by a distance, so that the side wall of the positioning head (7) approaches the needle positioning mechanism, which comprises: driving the core pulling seat (11) to retreat by the driving cylinder (10), driving the core pulling bent pin (9) to retreat by the core pulling seat (11), gradually withdrawing the core pulling bent pin (9) from the inclined guide hole and driving the floating seat (8) and the floating positioning column (6) to move downward together by a distance, so that the side wall of the positioning head (7) approaches the needle (15); in step B, the needle positioning mechanism is used to position the copper sleeve (18) on the positioning head (7), which comprises: driving the needle seat (16) and the needle (15) to move laterally by the positioning spring (17), so that one end of the needle (15) is clamped in the annular groove in the side wall of the copper sleeve (18); in step D, the floating core pulling mechanism drives the floating positioning column (6) and the positioning head (7) to move upward together by a distance, so that the copper sleeve (18) is released from the constraint of the needle positioning mechanism, and the copper sleeve (18) moves upward and contacts the upper positioning column (12), which comprises: driving the core pulling seat (11) to advance by the driving cylinder (10), driving the core pulling bent pin (9) to advance by the core pulling seat (11), gradually inserting the core pulling bent pin (9) into the inclined guide hole and driving the floating seat (8) and the floating positioning column (6) to move upward together by a distance, so that the copper sleeve (18) is released from the constraint of the needle (15), and the copper sleeve (18) moves upward and contacts the end of the upper positioning column (12); the floating positioning column (6) and the positioning head (7) are pressed upward together by the top driving spring (13), so that the copper sleeve (18) is kept in close contact with the upper positioning column (12); In step E, the floating core pulling mechanism drives the floating positioning column (6) and the positioning head (7) to move downward together by a distance, including: driving the cylinder (10) to drive the core pulling seat (11) to retreat, the core pulling seat (11) drives the core pulling bend pin (9) to retreat, the core pulling bend pin (9) gradually exits the inclined guide hole and drives the floating seat (8) and the floating positioning column (6) to move downward together by a distance.

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