Injection mold and injection molding method for forming collecting ring of automobile air conditioner motor

Abstract

The invention relates to the technical field of injection molds, in particular to an injection mold for forming a collecting ring of an automobile air conditioner motor, the injection mold comprises a lower mold base and an upper mold base, a lower cavity is formed in a lower mold core of the lower mold base, and an inner mounting notch and an outer mounting notch are formed in the lower cavity; the lower mold core is provided with a side insert and a side slide, the side insert is provided with a first forming part, and the side slide is provided with a second forming part; after the inner pin of the inner ring copper bar is inserted into the inner mounting notch and the outer pin of the outer ring copper bar is inserted into the outer mounting notch, the upper die holder and the lower die holder are closed to link the side insert to move outwards and the side slide to move inwards; the first forming part covers the inner mounting gap and abuts against the inner pin, and the second forming part covers the outer mounting gap and abuts against the outer pin. The invention further relates to an injection molding method for forming the collecting ring of the automobile air conditioner motor. Compared with the prior art, the inner ring copper bar and the outer ring copper bar are ensured not to deviate, the rejection rate of products is reduced, and the production yield of the collector ring is further improved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold and injection method for molding slip rings for automotive air conditioning motors. Background Technology

[0002] In related technologies, motor slip rings are core components for achieving reliable connections between stationary and rotating parts of the circuit. Please refer to [further details omitted]. Figure 1 This is the specific structure of the stator part of the motor slip ring produced by the inventor, including a plastic substrate 300 and an inner ring copper strip and an outer ring copper strip integrally formed on the plastic substrate 300. The inner ring copper strip has multiple inner ring pins 3001 exposed on the bottom of the plastic substrate 300, and the outer ring copper strip has multiple outer pins 3002 exposed on the bottom of the plastic substrate 300. The inner ring pins 3001 and the outer pins 3002 are in contact with the conductive ring of the rotor part.

[0003] Based on the specific structure of the motor slip ring described above, the inventor's method for producing the stator part of the slip ring is as follows: before injection molding the motor slip ring, the inner and outer copper strips need to be fed into the molding cavity of the injection mold, and after the upper and lower mold bases are closed, the plastic matrix is ​​injection molded, and the inner and outer copper strips are embedded in the plastic matrix.

[0004] However, the inventors discovered in actual production that the inner and outer copper strips need to be installed into the molding cavity before the upper and lower mold bases are closed. However, due to the structural limitations of the injection mold, vibrations can easily occur during the mold closing process after the inner and outer copper strips are installed into the molding cavity, which can lead to misalignment of the inner and outer copper strips. Once the inner and outer copper strips are misaligned, the inner and outer pins exposed at the bottom of the plastic substrate will not meet the design requirements, resulting in scrap and seriously affecting the production yield of the slip ring.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Summary of the Invention

[0006] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide an injection mold for molding slip rings of automotive air conditioning motors, effectively solving the technical defect of low production yield in the injection molds used for injection molding slip rings in the prior art.

[0007] This invention provides an injection mold for molding slip rings of automotive air conditioning motors, comprising: The lower mold base is equipped with a lower mold core; The upper mold base is movable up and down and is located on the lower mold base; the upper mold base is provided with an upper mold core; when the upper mold base and the lower mold base are closed, the upper mold core and the lower mold core can form a molding cavity for injection molding of plastic substrate; The lower mold core is provided with a recessed cavity, which has an inner mounting notch and an outer mounting notch; the lower mold core is provided with a movable side insert and a side slide, the side insert has a first forming part, and the side slide has a second forming part; When the inner pin of the inner ring copper strip is inserted into the inner mounting notch and the outer pin of the outer ring copper strip is inserted into the outer mounting notch, the upper mold base and the lower mold base can move the side insert outward and the side slide inward in linkage, so that the first forming part covers the inner mounting notch and abuts against the inner pin and the second forming part covers the outer mounting notch and abuts against the outer pin.

[0008] The beneficial effects of the injection mold for molding the slip ring of an automotive air conditioning motor provided by the present invention are as follows: Compared with the prior art, by setting an inner mounting notch and an outer mounting notch, and setting a first molding part on the side insert and a second molding part on the side slide; when the inner pin of the inner ring copper strip is inserted into the inner mounting notch and the outer pin of the outer ring copper strip is inserted into the outer mounting notch, the mold base and the lower mold base can close the mold so that the first molding part covers the inner mounting notch and abuts against the inner pin, and the second molding part covers the outer mounting notch and abuts against the outer pin, thereby ensuring that the inner ring copper strip and the outer ring copper strip will not be misaligned during the injection molding of the plastic substrate, thus ensuring that the injection molded slip ring meets the design requirements, reducing the scrap rate of the product, and further improving the production yield of the slip ring.

[0009] As a preferred embodiment, the top of the lower mold base is provided with a mold core moving plate that can move up and down. The upper surface of the mold core moving plate is provided with a mold core mounting cavity for the lower mold core to be inserted. The mold core mounting cavity passes through the upper and lower surfaces of the mold core moving plate. The recessed cavity is recessed downward on the upper surface of the lower mold core, and the inner mounting notch and the outer mounting notch are recessed downward on the surface of the recessed cavity; the inner mounting notch and the outer mounting notch extend upward to have insertion support parts, which are used to insert into the V-shaped notches of the inner pin and the outer pin.

[0010] As a preferred embodiment, the lower mold core is provided with a core pillar clearance cavity, which extends through the upper and lower surfaces of the lower mold core; the lower mold core is provided with multiple insert limiting plates around the core pillar clearance cavity, and the multiple insert limiting plates are arranged in a circular array with equal spacing, and the insert limiting plates between each pair of insert limiting plates form an insert movement notch for restricting the side inserts, and a side insert is movably installed in an insert movement notch.

[0011] As a preferred embodiment, the side insert includes an insert body, a through-hole forming part A integrally formed on the top of the insert body, and an insert moving part integrally formed on the bottom of the insert body, wherein the first forming part is integrally formed on the outer side of the through-hole forming part A. The top of the insert limiting plate extends outward to form a through hole forming part B. When the upper mold base and the lower mold base are closed and multiple side inserts move outward in linkage, the side inserts can enter the insert moving notch, so that the through hole forming part A and the through hole forming part B form a through hole forming protrusion for injection molding the central through hole of the plastic matrix.

[0012] 5. The injection mold for molding the slip ring of an automotive air conditioning motor according to claim 4, characterized in that a mold core mounting base plate is provided at the bottom of the mold core mounting cavity, the lower mold core, the mold core moving plate and the mold core mounting base plate form an insert moving cavity for horizontal displacement of the insert moving part, and the mold core mounting base plate is provided with a first clearance hole penetrating its upper and lower surfaces, the first clearance hole being inclined inward from bottom to top. The insert moving part is provided with a first driving hole that penetrates its upper and lower surfaces. The first driving hole is inclined from bottom to top and inward. The first clearance hole is connected to the first driving hole and the same inclination angle is provided. It also includes a core column fixing plate fixedly installed on the top of the lower mold base. The core column fixing plate is provided with a plurality of first drive rods. The first drive rods are inclined from bottom to top and inward. The first drive rods can be inserted into the first drive hole through the first clearance hole. When the upper mold base moves downward relative to the lower mold base, the first drive rod can move the side insert outward and insert the top of the first drive rod into the first drive hole; when the upper mold base moves upward relative to the lower mold base, the first drive rod can move the side insert inward and withdraw the top of the first drive rod from the first drive hole.

[0013] As a preferred embodiment, an intermediate core post is fixedly installed on the upper surface of the core post fixing plate, and the intermediate core post extends upward through the core post clearance cavity; When the upper mold base moves down relative to the lower mold base, it can move the side inserts outward and move the middle core pillar up relative to the lower mold core, so that the outer side of the middle core pillar abuts against the inner side of each side insert.

[0014] As a preferred embodiment, the top periphery of the central core column is provided with multiple first abutting inclined surfaces and multiple second abutting inclined surfaces, all of which are inclined inward from bottom to top. Multiple first abutting slopes are arranged in a circular array, multiple second abutting slopes are arranged in a circular array, and one second abutting slope is located between two first abutting slopes; The inner side of the side insert is provided with a third abutting slope, and the insert limiting plate is provided with a fourth abutting slope; the first abutting slope abuts against the third abutting slope, and when the upper mold base moves down relative to the lower mold base, the second abutting slope abuts against the fourth abutting slope.

[0015] As a preferred embodiment, the lower mold core and the mold core moving plate are surrounded by a sliding notch, and the side slide can be installed in the sliding notch in a horizontally movable manner. The bottom of the upper mold base is provided with a second drive rod, which is inclined from top to bottom and outward; the side slide is provided with a second drive hole, which passes through the upper and lower surfaces of the side slide and is inclined from top to bottom and outward. After the upper mold base moves upward relative to the lower mold base for the first time, it can move outward through the linkage of the side slide via the second drive rod; after the upper mold base moves upward relative to the lower mold base for the second time, it can move the mold core moving plate upward and cause the insert block linked by the first drive rod to move inward.

[0016] As a preferred embodiment, the lower mold base is provided with an ejector plate that can move up and down, and the upper surface of the ejector plate is provided with a plurality of ejector pins that extend upward to the surface of the lower cavity; When the ejector plate moves up, the top of the ejector pin can be linked to bulge upward from the surface of the concave cavity to eject the plastic substrate.

[0017] This invention also provides an injection molding method for molding a slip ring for an automotive air conditioning motor, applied to the aforementioned injection mold for molding a slip ring for an automotive air conditioning motor; wherein, the injection molding method includes... Step 1: Provide an injection molding machine, assemble the injection mold for molding the slip ring of the automotive air conditioning motor onto the injection molding machine, and connect the upper mold base and ejector plate through the ejection system of the injection molding machine; Step 2: Provide an inner copper strip and an outer copper strip; insert the inner copper strip into the inner mounting notch one by one, so that the inner copper strip except for the inner pins is exposed above the recessed cavity; insert the outer copper strip into the outer mounting notch one by one, so that the outer copper strip except for the inner pins is exposed above the recessed cavity. Step 3: The ejection system moves the upper mold base down relative to the lower mold base to close the mold, and moves the side insert outward and the side slide inward. The first molding part covers the inner mounting notch and abuts against the inner pin, and the second molding part covers the outer mounting notch and abuts against the outer pin. Step 4: The injection molding machine provides hot melt paste through the extrusion system and injects it into the molding chamber through the injection nozzle; the hot melt paste is allowed to cool for 30 to 60 seconds to form the plastic matrix; Step 5: The ejection system moves the upper mold base upward for the first time, causing the upper mold base to move upward relative to the lower mold base by a first distance, so that the upper mold core is demolded from the plastic substrate, and the side slide moves outward through the second drive rod to complete the demolding with the plastic substrate; Step 6: The ejection system moves the upper mold base upward for the second time, so that the upper mold base moves upward relative to the lower mold base by a second distance. The second drive rod moves the side slide outward to the maximum stroke and moves the mold core moving plate upward. At the same time, the middle core pillar moves downward relative to the mold core moving plate, so that the first drive rod moves the side insert inward and completes demolding from the plastic substrate. Step 7: The ejector system moves the ejector plate upward, causing the ejector pin to protrude upward from the surface of the concave cavity, thus ejecting the plastic substrate from the concave cavity and feeding it out. Step 8: Repeat steps 2-7 to continuously injection mold the motor slip ring and unload it.

[0018] The beneficial effects of the injection molding method for forming slip rings for automotive air conditioning motors provided by the present invention are as follows: Compared with the prior art, firstly, by setting an inner mounting notch and an outer mounting notch, and setting a first molding part and a second molding part on the side insert, when the inner pin of the inner ring copper strip is inserted into the inner mounting notch and the outer pin of the outer ring copper strip is inserted into the outer mounting notch, the mold base and the lower mold base can close the mold so that the first molding part covers the inner mounting notch and abuts against the inner pin, and the second molding part covers the outer mounting notch and abuts against the outer pin, thereby ensuring that the inner ring copper strip and the outer ring copper strip will not be misaligned during the injection molding of the plastic substrate, thereby ensuring that the injection-molded slip ring meets the design requirements, reducing the scrap rate of the product, and further improving the production yield of the slip ring; Secondly, the mold opening action of the injection mold is achieved by driving the upper mold base to move upward for the first time and moving the side slide outward to demold, and then driving the upper mold base to move upward for the second time and moving the mold core moving plate and side insert inward to demold. This mold opening process involves fewer actions and does not require additional hydraulic cylinders for demolding. This not only simplifies the overall structure of the injection mold but also shortens the mold opening time, thereby improving the production efficiency of the injection mold and reducing the usage cost of the injection mold. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the slip ring of the automotive air conditioning motor currently manufactured by the inventor; Figure 2 This is a three-dimensional structural schematic diagram of the injection mold for molding the slip ring of an automotive air conditioning motor provided in an embodiment of this application; Figure 3 yes Figure 2 The diagram shows a three-dimensional structure of the lower mold base of an injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 4 yes Figure 1 The diagram shows a three-dimensional structure of the upper mold base of an injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 5yes Figure 2 The image shows a cross-sectional view at the CC section of an injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 6 yes Figure 5 The diagram shown is a partial enlarged view of point F of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 7 yes Figure 3 The image shows a top view of the lower mold base of an injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 8 yes Figure 7 The image shown is a partial enlarged view of point A on the lower mold base of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 9 yes Figure 7 The figure shown is a three-dimensional cross-sectional view of the lower mold base at point AA of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 10 yes Figure 9 The image shown is a partial enlarged view of point B on the lower mold base of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 11 yes Figure 7 The figure shown is a three-dimensional cross-sectional view of the BB section of the lower mold base of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 12 yes Figure 11 The image shown is a partial enlarged view of point C on the lower mold base of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 13 yes Figure 3 The diagram shows a partial three-dimensional structure of the lower mold base of the injection mold used to mold the slip ring of an automotive air conditioning motor. Figure 14 yes Figure 13 The enlarged view of part D in the partial three-dimensional structure schematic diagram of the lower mold base of the injection mold used to mold the slip ring of the automotive air conditioning motor is shown. Figure 15 yes Figure 13 The enlarged view of part E in the partial three-dimensional structure schematic diagram of the lower mold base of the injection mold used to mold the slip ring of the automotive air conditioning motor; Figure 16 yes Figure 2 The diagram shows a three-dimensional structure of a motor slip ring injection molded using an injection mold for molding an automotive air conditioning motor slip ring. Figure 17 yes Figure 16 The diagram shows the arrangement of the inner and outer copper strips of the motor slip ring. Figure 18 yes Figure 16The diagram shows a three-dimensional structure of the motor slip ring from another angle.

[0021] The following are the labeling elements in the figure: 100. Injection molds used for molding slip rings for automotive air conditioning motors; 10. Lower mold base; 11. Lower mold core; 111. Lower recessed cavity; 112. Inner mounting notch; 113. Outer mounting notch; 1131. Outer notch A; 1132. Outer notch B; 114. Insertion support part; 115. Core pillar clearance cavity; 1151. Insert limiting plate; 1152. Insert moving notch; 1153. Through hole forming part B; 1154. Fourth abutment inclined surface; 116. First locking hole; 117. Copper strip support part; 1171. Support notch; 12. Side insert; 121. First forming part; 122. Insert main body part; 123. Through hole forming part A; 124. Insert moving part; 125. First driving hole; 126. 13. Third abutting slope; 13. Side slide; 131. Second forming part; 1311. Forming part A; 1312. Forming part B; 132. Second drive hole; 14. Mold core moving plate; 141. Mold core mounting cavity; 142. Mold core mounting base plate; 1421. First clearance hole; 143. Insert moving cavity; 144. Slide moving notch; 145. First guide limiting hole; 15. Core pillar fixing plate; 151. Intermediate core pillar; 1511. First abutting slope; 1512. Second abutting slope; 1513. Locking protrusion; 152. First drive rod; 153. Guide limiting post; 16. Ejector plate; 161. Ejector pin; 17. Spring; 20. Upper mold base; 21. Upper mold core; 211. Upper cavity; 212. Locking hole; 22. Second drive rod; 23. Injection port; 24. Injection channel; 25. Second guide limiting hole; 30. Molding chamber; 200. Motor slip ring; 2001. Plastic substrate; 2002. Inner ring copper strip; 2003. Outer ring copper strip; 20031. Outer copper strip A; 20032. Outer copper strip B; 2004. Inner pin; 2005. Outer pin; 2006. V-shaped notch; 2007. Outer snap-fit; 300, Plastic substrate; 3001, Inner ring pin; 3002, Outer ring pin; r1, the first virtual circle; r2, the second virtual circle. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Please refer to the following: Figures 1 to 18 The injection mold 100 for molding the slip ring of an automotive air conditioning motor, provided in the embodiments of this application, will now be described. The injection mold 100 for molding the slip ring of an automotive air conditioning motor includes a lower mold base 10 and an upper mold base 20.

[0028] The lower mold base 10 is provided with a lower mold core 11, and the upper mold base 20 is movable up and down on the lower mold base 10; the upper mold base 20 is provided with an upper mold core 21. When the upper mold base 20 and the lower mold base 10 are closed, the upper mold core 21 and the lower mold core 11 can form a molding cavity 30 for injection molding of plastic substrate 2001. The lower mold core 11 is provided with a recessed cavity 111, which is provided with an inner mounting notch 112 and an outer mounting notch 113. The lower mold core 11 is provided with a movable side insert 12 and a side slide 13. The side insert 12 is provided with a first forming part 121, and the side slide 13 is provided with a second forming part 131. When the inner pin 2004 of the inner ring copper strip 2002 is inserted into the inner mounting notch 112 and the outer pin 2005 of the outer ring copper strip 2003 is inserted into the outer mounting notch 113, the upper mold base 20 and the lower mold base 10 can close the mold together, which can move the side insert 12 outward and the side slide 13 inward, so that the first forming part 121 covers the inner mounting notch 112 and abuts against the inner pin 2004, and the second forming part 131 covers the outer mounting notch 113 and abuts against the outer pin 2005.

[0029] Specifically, by setting an inner mounting notch 112 and an outer mounting notch 113, and setting a first molding part 121 on the side insert 12 and a second molding part 131 on the side slide 13; when the inner pin 2004 of the inner ring copper strip 2002 is inserted into the inner mounting notch 112 and the outer pin 2005 of the outer ring copper strip 2003 is inserted into the outer mounting notch 113, the mold base 20 and the lower mold base 10 close the mold so that the first molding part 121 covers the inner mounting notch 112 and abuts against the inner pin 2004 and the second molding part 131 covers the outer mounting notch 113 and abuts against the outer pin 2005, thereby ensuring that the inner ring copper strip 2002 and the outer ring copper strip 2003 will not be misaligned during the injection molding of the plastic substrate 2001, thereby ensuring that the injection molded slip ring meets the design requirements, reducing the scrap rate of the product, and further improving the production yield of the slip ring.

[0030] More specifically, the upper mold core 21 has an upper recess 211 at its bottom; when the upper mold base 20 and the lower mold base 10 are closed, the upper recess 211 and the lower recess 111 can form a molding chamber 30 for injection molding of the plastic substrate 2001. The upper mold base 20 has a glue injection port 23, and the upper mold core 21 has a glue injection channel 24 that can be connected to the glue injection port 23. The other end of the glue injection channel 24 is connected to the molding chamber 30; when the upper mold base 20 and the lower mold base 10 are closed, the injection molding and extrusion system can provide hot melt slurry, which is injected from the glue injection port 23, flows through the glue injection channel 24 and is injected into the molding chamber 30. The hot melt slurry in the molding chamber 30 is cooled and solidified after 30 to 60 seconds to form the plastic substrate 2001.

[0031] It should be noted that the injection mold 100 for molding the slip ring of an automotive air conditioning motor provided in this embodiment is a double-cavity injection mold with two molding chambers 30 spaced apart on the left and right. The injection port 23 is connected to the two molding chambers 30 through the injection channel 24. After the hot melt slurry is injected from the injection port 23 at one time, it can flow into different molding chambers 30 through the injection channel 24.

[0032] In other embodiments, the top of the lower mold base 10 is provided with a mold core moving plate 14 that can move up and down. The upper surface of the mold core moving plate 14 is provided with a mold core mounting cavity 141 for the lower mold core 11 to be inserted. The mold core mounting cavity 141 penetrates the upper and lower surfaces of the mold core moving plate 14. The lower recess 111 is recessed downward on the upper surface of the lower mold core 11. The inner mounting notch 112 and the outer mounting notch 113 are recessed downward on the surface of the lower recess 111. The inner mounting notch 112 and the outer mounting notch 113 extend upward to provide a plug-in support portion 114. The plug-in support portion 114 is used to insert into the V-shaped notch 2006 of the inner pin 2004 and the outer pin 2005.

[0033] Specifically, there are multiple inner mounting notches 112 arranged in a circular array, and these notches are collinear on the first virtual circle r1. The outer mounting notches 113 include outer notches A1131 and B1132, also arranged in a circular array. One outer notch B1132 is located between two outer notches A1131, and all outer notches A1131 and B1132 are collinear on the second virtual circle r2. The diameter of the first virtual circle r1 is smaller than the diameter of the second virtual circle r2. Correspondingly, the outer copper strip 2003 has outer copper strips A20031 and B20032, and outer pins 2005 are correspondingly located at the bottom of outer copper strips A20031 and B20032.

[0034] More specifically, the surface of the recessed cavity 111 is provided with multiple copper strip support portions 117 protruding upwards. Each copper strip support portion 117 has a support notch 1171, which penetrates the upper surface of the copper strip support portion 117 and the side surface extending in the direction of the virtual circle. The copper strip support portion 117 is located between the inner mounting notch 112 and the outer mounting notch 113. When each outer pin 2005 of the outer ring copper strip 2003 is inserted into the outer mounting notch 113, the outer ring copper strip 2003 can be engaged in the support notch 1171. The position of the outer ring copper strip 2003 is maintained by the copper strip support portions 117, which helps to further improve the positional deviation of the outer ring copper strip 2003 during the mold closing process of the upper mold base 20 and the lower mold base 10 and the subsequent hot melt slurry injection process, thereby further improving the production yield.

[0035] Furthermore, the second molding part 131 includes molding part A1311 and molding part B1312. Molding part A1311 covers the outer notch A1131 and abuts against the outer pin 2005, and molding part B1312 covers the outer pin 2005. By dividing the outer copper strip into outer copper strip A20031 and outer copper strip B20032, while ensuring that the motor slip ring can be injection molded, the specific structure of outer copper strip A20031, outer copper strip B20032 and inner copper strip are improved as much as possible, thereby further simplifying the structure of the injection mold, reducing the use cost of the injection mold and making subsequent maintenance more convenient.

[0036] In other embodiments, the lower mold core 11 is provided with a core pillar clearance cavity 115, which penetrates the upper and lower surfaces of the lower mold core 11. The lower mold core 11 has multiple insert limiting plates 1151 around the core pillar clearance cavity 115. These insert limiting plates 1151 are arranged in a circular, equally spaced array. Between each pair of insert limiting plates 1151, an insert movement notch 1152 is formed to restrict the movement of the side insert 12. One side insert 12 is movably installed within one insert movement notch 1152. This structure, where the side insert 12 is movably installed within the insert movement notch 1152, improves the reliability and stability of the side insert 12 during horizontal movement, reducing the likelihood of mold burn-out.

[0037] Specifically, the side insert 12 includes an insert body 122, a through-hole forming part A123 integrally formed on the top of the insert body 122, and an insert moving part 124 integrally formed on the bottom of the insert body 122. The first forming part 121 is integrally formed on the outer side of the through-hole forming part A123. The top of the insert limiting plate 1151 extends outward with a through-hole forming part B1153. When the upper mold base 20 and the lower mold base 10 are closed and multiple side inserts 12 move outward in linkage, the side insert 12 can enter the insert moving notch 1152, so that the through-hole forming part A123 and the through-hole forming part B1153 form a through-hole forming protrusion for injection molding the central through-hole of the plastic substrate 2001.

[0038] More specifically, the bottom of the mold core mounting cavity 141 is provided with a mold core mounting base plate 142. The lower mold core 11, the mold core moving plate 14, and the mold core mounting base plate 142 form an insert moving cavity 143 for horizontal displacement of the insert moving part 124. The mold core mounting base plate 142 is provided with a first clearance hole 1421 penetrating its upper and lower surfaces. The first clearance hole 1421 is inclined inward from bottom to top. The insert moving part 124 is provided with a first driving hole 125 penetrating its upper and lower surfaces. The first driving hole 125 is inclined inward from bottom to top. The first clearance hole 1421 and the first driving hole 125 are connected and have the same inclination angle. It also includes a fixed device mounted on the lower mold. The core column fixing plate 15 at the top of the base 10 is provided with a plurality of first drive rods 152. The first drive rods 152 are inclined from bottom to top and inward. The first drive rods 152 can be inserted into the first drive hole 125 through the first clearance hole 1421. When the upper mold base 20 moves down relative to the lower mold base 10, the first drive rods 152 can move outward in conjunction with the side insert 12 and insert the top of the first drive rods 152 into the first drive hole 125. When the upper mold base 20 moves up relative to the lower mold base 10, the first drive rods 152 can move inward in conjunction with the side insert 12 and withdraw the top of the first drive rods 152 from the first drive hole 125.

[0039] Preferably, the bottom of the lower mold core 11 is provided with a first locking hole 116. When the upper mold base 20 is closed relative to the lower mold base 10, the first drive rod 152 can extend upward from the first drive hole 125 and be inserted into the first locking hole 116, thereby completing the locking of the side slide 13. This will prevent displacement during subsequent hot melt slurry injection and pressure holding operations, and improve the yield of injection molding.

[0040] In other embodiments, a middle core 151 is fixedly installed on the upper surface of the core 15 fixing plate 15. The middle core 151 extends upward through the core 115 clearance cavity. When the upper mold base 20 moves downward relative to the lower mold base 10, it can move the side inserts 12 outward and move the middle core 151 upward relative to the lower mold core 11, so that the outer side of the middle core 151 abuts against the inner side of each side insert 12.

[0041] Specifically, the top periphery of the central core pillar 151 is provided with multiple first abutting inclined surfaces 1511 and multiple second abutting inclined surfaces 1512, all of which are inclined inward from bottom to top. The multiple first abutting inclined surfaces 1511 are arranged in a circular array, and the multiple second abutting inclined surfaces 1512 are arranged in a circular array, with one second abutting inclined surface 1512 located between two first abutting inclined surfaces 1511. The inner side of the side insert 12 is provided with a third abutting inclined surface 126, and the insert limiting plate 1151 is provided with a fourth abutting inclined surface 1154. The first abutting inclined surface 1511 abuts against the third abutting inclined surface 126, and when the upper mold base 20 moves downward relative to the lower mold base 10, the second abutting inclined surface 1512 abuts against the fourth abutting inclined surface 1154.

[0042] It is understandable that by setting the intermediate core pillar 151 structure, after the upper mold base 20 and the lower mold base 10 are closed, the intermediate core pillar 151 can be used to abut against multiple side inserts 12, thereby maintaining the positional accuracy of multiple side inserts 12 after mold closing, and ensuring that multiple side inserts 12 will not be misaligned due to pressure during injection and pressure holding, thereby improving the yield of injection molded motor slip rings.

[0043] Preferably, the top of the intermediate core 151 is provided with a locking protrusion 1513, and the upper mold core 21 is provided with a locking hole 212 at the bottom of the upper cavity 211. When the upper mold base 20 and the lower mold base 10 are closed, the locking protrusion 1513 can be inserted into the locking hole 212 to achieve a locking effect, thereby further improving the reliability of the injection mold.

[0044] More specifically, the lower mold core 11 and the mold core moving plate 14 form a sliding movement notch 144, and the side slide 13 can be horizontally moved inward and outward and installed in the sliding movement notch 144; the bottom of the upper mold base 20 is provided with a second drive rod 22, which is inclined from top to bottom and outward; the side slide 13 is provided with a second drive hole 132, which penetrates the upper and lower surfaces of the side slide 13 and is inclined from top to bottom and outward; when the upper mold base 20 moves upward relative to the lower mold base 10 for the first time, it can move the side slide 13 outward through the second drive rod 22; when the upper mold base 20 moves upward relative to the lower mold base 10 for the second time, it can move the mold core moving plate 14 upward and cause the first drive rod 152 to move the side insert 12 inward.

[0045] Preferably, the lower mold base 10 is provided with an ejector plate 16 that can move up and down. The upper surface of the ejector plate 16 is provided with a plurality of ejector pins 161, which extend upward to the surface of the lower cavity 111. When the ejector plate 16 moves upward, the top of the ejector pins 161 can be linked to protrude upward from the surface of the lower cavity 111 to eject the plastic substrate 2001 for feeding.

[0046] Furthermore, the core pillar fixing plate 15 has guide limiting posts 153 at its four corners (front, rear, left, and right) on its upper surface, with the guide limiting posts 153 extending vertically upwards; the mold core moving plate 14 has first guide limiting holes 145 at its four corners, which vertically penetrate the upper and lower surfaces of the mold core moving plate 14; the upper mold base 20 has second guide limiting holes 25 at its four corners, which vertically penetrate the upper and lower surfaces of the upper mold base 20; the first guide limiting holes 145 and the second guide limiting holes 25, located at the same corner position, are interconnected and allow the guide limiting posts 153 to be inserted, thereby providing guidance for the vertical movement of the mold core moving plate 14 and the upper mold base 20 using the guide limiting posts 153. Simultaneously, a spring 17 is provided between the core pillar fixing plate 15 and the mold core moving plate 14, which provides auxiliary elastic force during the upward movement of the mold core moving plate 14, thereby reducing the weight borne by the upper mold base 20 during the mold opening process when the mold core moving plate 14 moves upwards in conjunction with the mold core moving plate 14.

[0047] In other embodiments, an injection molding method for molding a slip ring for an automotive air conditioning motor is also provided. The injection molding method is applied to an injection mold 100 for molding the slip ring for the automotive air conditioning motor. The injection molding method includes the following steps: Step 1: Provide an injection molding machine, assemble the injection mold 100 for molding the slip ring of the automotive air conditioning motor onto the injection molding machine, and connect the upper mold base 20 and the ejector plate 16 through the ejection system of the injection molding machine; Step 2: Provide an inner copper strip 2002 and an outer copper strip 2003; insert the inner pins 2004 of the inner copper strip 2002 into the inner mounting notches 112 one by one, so that the portion of the inner copper strip 2002 except for the inner pins 2004 is exposed above the recessed cavity 111; insert the outer pins 2005 of the outer copper strip 2003 into the outer mounting notches 113 one by one, so that the portion of the outer copper strip 2003 except for the outer pins 2005 is exposed above the recessed cavity 111. Step 3: The ejection system moves the upper mold base 20 down relative to the lower mold base 10 to close the mold, and moves the side insert 12 outward and the side slide 13 inward. The first molding part 121 covers the inner mounting notch 112 and abuts against the inner pin 2004, and the second molding part 131 covers the outer mounting notch 113 and abuts against the outer pin 2005. Step 4: The injection molding machine provides hot melt paste through the extrusion system and injects it into the molding chamber 30 through the injection nozzle 23; the hot melt paste is cooled for 30 to 60 seconds to form the plastic matrix 2001; Step 5: The ejection system moves the upper mold base 20 upward for the first time, so that the upper mold base 20 moves upward relative to the lower mold base 10 by a first distance, so that the upper mold core 21 is demolded from the plastic substrate 2001, and the side slide 13 moves outward through the second drive rod 22 to complete the demolding with the plastic substrate 2001. Step 6: The ejection system moves the upper mold base 20 upward for the second time, so that the upper mold base 20 moves upward relative to the lower mold base 10 by a second distance. The second drive rod 22 moves the side slide 13 outward to the maximum stroke and moves the mold core moving plate 14 upward. At the same time, the middle core 151 moves downward relative to the mold core moving plate 14, so that the first drive rod 152 moves the side insert 12 inward to complete demolding from the plastic substrate 2001. Step 7: The ejector system moves the ejector plate 16 upward, causing the ejector pin 161 to protrude upward from the surface of the recessed cavity 111, thus ejecting the plastic substrate 2001 from the recessed cavity 111 for feeding. Step 8: Repeat steps 2-7 to continuously injection mold the motor slip ring 200 and unload it.

[0048] Specifically, in step 2, the inner copper strip 2002 and the outer copper strip 2003 are fed manually or by a robot. When feeding the outer copper strip 2003, it is necessary to ensure that the outer copper strip 2003 is inserted into the support notch 1171.

[0049] Furthermore, in step 3, during the process of the upper mold base 20 moving down relative to the lower mold base 10 to close the mold, the side slide 13 moves inward through the second drive rod 22 and the side insert 12 moves outward through the first drive rod 152, so that the upper mold core 21, lower mold core 11, side insert 12 and side slide 13 are injection molded to form the motor slip ring; and the molding part A1311 and molding part B1312 corresponding to the side slide 13 respectively cover the outer notch A1131 and outer notch B1132, thereby covering the outer copper strip A20031 and outer copper strip B20032 outer pins 2005 of the outer ring copper strip 2003.

[0050] Specifically, in step 5, the ejection system moves the upper mold base 20 upward by 5cm for the first time, which is the first mold opening action. During the first mold opening action, the upper mold core 21 and the plastic substrate 2001 are demolded, and multiple side slides 13 are moved outward through the second drive rod 22, so that the multiple side slides 13 and the plastic substrate 2001 are demolded. Then, the outer snap-fit ​​2007 is injection molded onto the plastic substrate 2001 with the help of the molding part A1311 and the molding part B.

[0051] Specifically, in step 6, the ejection system moves the upper mold base 20 upward for the second time by 10cm on the basis of the first upward movement, which is the second mold opening action. During the second mold opening action, the second drive rod 22 moves the side slide 13 outward to the maximum stroke. At this time, the side slide 13 is stuck and does not move. When the upper mold base 20 moves upward for the second time, the mold core moving plate 14 moves upward relative to the lower mold base 10 through the second drive rod 22 and the side slide 13 without moving. At this time, the middle core 151 moves downward relative to the mold core moving plate 14, and moves multiple side inserts 12 inward through the first drive rod 152, so that the side inserts 12 and the plastic substrate 2001 are demolded.

[0052] The above are merely preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present invention.

Claims

1. An injection mold for forming a motor ring of an automobile air conditioner, comprising a lower mold base (10) provided with a lower mold core (11); an upper mold base (20) movably arranged on the lower mold base (10); the upper mold base (20) is provided with an upper mold core (21); when the upper mold base (20) and the lower mold base (10) are closed, the upper mold core (21) and the lower mold core (11) can form a molding chamber (30) for injection molding a plastic base (2001); characterized in that the lower mold core (11) is provided with a lower cavity (111), the lower cavity (111) is provided with an inner mounting notch (112) and an outer mounting notch (113); the lower mold core (11) is provided with a movable side insert block (12) and a side position (13), the side insert block (12) is provided with a first forming part (121), and the side position (13) is provided with a second forming part (131); when the inner pin (2004) of the inner copper bar (2002) is inserted into the inner mounting notch (112) and the outer pin (2005) of the outer copper bar (2003) is inserted into the outer mounting notch (113), the upper mold base (20) and the lower mold base (10) are closed to move the side insert block (12) outward and the side position (13) inward, so that the first forming part (121) covers the inner mounting notch (112) and abuts against the inner pin (2004), and the second forming part (131) covers the outer mounting notch (113) and abuts against the outer pin (2005).

2. The injection mold for molding a current collector ring of an automotive air conditioner motor according to claim 1, characterized by, The top of the lower mold base (10) is provided with a mold core moving plate (14) which can move up and down, the upper surface of the mold core moving plate (14) is provided with a mold core mounting cavity (141) for accommodating the lower mold core (11), and the mold core mounting cavity (141) penetrates the upper and lower surfaces of the mold core moving plate (14); the lower cavity (111) is concave downward on the upper surface of the lower mold core (11), and the inner mounting notch (112) and the outer mounting notch (113) are concave downward on the surface of the lower cavity (111); the inner mounting notch (112) and the outer mounting notch (113) extend upwardly to form a plug-in support part (114), which is used for being inserted into the V-shaped notch (2006) of the inner pin (2004) and the outer pin (2005).

3. The injection mold for molding a current collector ring of an automotive air conditioning motor according to claim 1 or 2, characterized in that, The lower mold core (11) is provided with a core column avoiding cavity (115) which penetrates the upper and lower surfaces of the lower mold core (11); the lower mold core (11) is provided with a plurality of insert block limiting plates (1151) around the core column avoiding cavity (115), the plurality of insert block limiting plates (1151) are arranged in a circular and equidistant array, and a mold block moving gap (1152) for limiting the movement of the side insert block (12) is formed between every two insert block limiting plates (1151), and one side insert block (12) can be movably arranged in one mold block moving gap (1152).

4. The injection mold for molding a current collector ring of an automotive air conditioner motor according to claim 3, characterized by, The side insert block (12) comprises a block main part (122), a through hole forming part A (123) integrally formed on the top of the block main part (122), and a block moving part (124) integrally formed on the bottom of the block main part (122), and the first forming part (121) is integrally formed on the outer side surface of the through hole forming part A (123). The top of the insert limiting plate (1151) extends outwardly with a through hole forming part B (1153), when the upper die seat (20) and the lower die seat (10) are closed and the plurality of side inserts (12) are moved outwardly, the side inserts (12) can enter the insert moving gap (1152), so that the through hole forming part A (123) and the through hole forming part B (1153) surround the through hole forming convex part for injection molding the central through hole of the plastic base (2001).

5. The injection mold for molding a current collector ring of an automotive air conditioner motor according to claim 4, characterized by, The bottom of the die core mounting cavity (141) is provided with a die core mounting base plate (142), the lower die core (11), the die core moving plate (14) and the die core mounting base plate (142) surround the insert moving cavity (143) for horizontal displacement of the insert moving part (124), the die core mounting base plate (142) is provided with a first avoiding hole (1421) penetrating through the upper and lower surfaces thereof, the first avoiding hole (1421) is inwardly inclined from bottom to top; The insert moving part (124) is provided with a first driving hole (125) penetrating through the upper and lower surfaces thereof, the first driving hole (125) is inwardly inclined from bottom to top, the first avoiding hole (1421) is in conductive connection with the first driving hole (125) and has the same inclination angle; Further comprising a core column fixing plate (15) fixedly installed on the top of the lower die seat (10), the core column fixing plate (15) is provided with a plurality of first driving rods (152), the first driving rods (152) are inwardly inclined from bottom to top, the first driving rods (152) can be inserted into the first driving hole (125) through the first avoiding hole (1421); When the upper die seat (20) is lowered relative to the lower die seat (10), the first driving rods (152) can drive the side inserts (12) to move outwardly and make the top of the first driving rods (152) inserted into the first driving hole (125); when the upper die seat (20) is raised relative to the lower die seat (10), the first driving rods (152) can drive the side inserts (12) to move inwardly and make the top of the first driving rods (152) withdrawn from the first driving hole (125).

6. The injection mold for molding a current collector ring of an automotive air conditioner motor according to claim 5, wherein The upper surface of the core column fixing plate (15) is fixedly installed with an intermediate core column (151), the intermediate core column (151) extends upwardly through the core column avoiding cavity (115); When the upper die seat (20) is lowered relative to the lower die seat (10), the side inserts (12) can be driven to move outwardly and make the intermediate core column (151) raised relative to the lower die core (11), so that the outer side surface of the intermediate core column (151) abuts against the inner side surface of each side insert (12).

7. The injection mold for molding a current collector ring of an automotive air conditioning motor according to claim 5 or 6, characterized in that, The top of the intermediate core column (151) is provided with a plurality of first abutting inclined surfaces (1511) and a plurality of second abutting inclined surfaces (1512), the plurality of first abutting inclined surfaces (1511) and the plurality of second abutting inclined surfaces (1512) are inwardly inclined from bottom to top; The plurality of first abutting inclined surfaces (1511) are arranged in a circular array, the plurality of second abutting inclined surfaces (1512) are arranged in a circular array, and one second abutting inclined surface (1512) is located between two first abutting inclined surfaces (1511); The third abutting slope (126) is arranged on the inner side of the side block (12), and the block limiting plate (1151) is provided with a fourth abutting slope (1154); the first abutting slope (1511) abuts against the third abutting slope (126), and after the upper die holder (20) is lowered relative to the lower die holder (10), the second abutting slope (1512) abuts against the fourth abutting slope (1154).

8. The injection mold for molding a current collector ring of an automotive air conditioner motor according to claim 7, characterized by, The lower die core (11) and the die core moving plate (14) are surrounded by a row position moving gap (144), and the row position (13) can be installed in the row position moving gap (144) horizontally and movably; The second driving rod (22) is arranged from top to bottom and outwardly inclined on the bottom of the upper die holder (20); the second driving hole (132) is arranged from top to bottom and outwardly inclined and penetrates through the upper and lower surfaces of the row position (13); After the upper die holder (20) is moved upward for the first time relative to the lower die holder (10), the row position (13) can be moved outwardly through the second driving rod (22); after the upper die holder (20) is moved upward for the second time relative to the lower die holder (10), the die core moving plate (14) can be moved upward and the first driving rod (152) can be linked to move the side block (12) inwardly.

9. The injection mold for molding a current collector ring of an automotive air conditioner motor according to claim 8, characterized by, The lower die holder (10) is provided with a ejector plate (16) which can be moved upward and downward, and the upper surface of the ejector plate (16) is provided with a plurality of ejector pins (161) which extend upward to the surface of the lower cavity (111); After the ejector plate (16) is moved upward, the top of the ejector pin (161) can be protruded upward from the surface of the lower cavity (111) to eject the plastic base (2001).

10. A method for injection molding an automobile air conditioner motor collector ring, applied to the injection molding mold (100) for forming an automobile air conditioner motor collector ring according to any one of claims 1-9, characterized in that, The injection molding method comprises Step 1, providing an injection molding machine, assembling an injection mold for molding a motor ring of an automobile air conditioner on the injection molding machine, and connecting the upper die holder (20) and the ejector plate (16) through the ejection system of the injection molding machine; Step 2, providing an inner ring copper strip (2002) and an outer ring copper strip (2003); inserting a plurality of inner pins (2004) of the inner ring copper strip (2002) into a plurality of inner mounting gaps (112) one by one, so that the inner ring copper strip (2002) is exposed above the lower cavity (111) except for the inner pin (2004) part; inserting a plurality of outer pins (2005) of the outer ring copper strip (2003) into a plurality of outer mounting gaps (113) one by one, so that the outer ring copper strip (2003) is exposed above the lower cavity (111) except for the outer pin (2005) part; Step 3, the ejection system links the upper die holder (20) to move downward relative to the lower die holder (10) to close the mold, and links the side block (12) to move outward and the row position (13) to move inward, and uses the first forming part (121) to cover the inner mounting gap (112) and abuts against the inner pin (2004), and uses the second forming part (131) to cover the outer mounting gap (113) and abuts against the outer pin (2005); Step 4, the injection molding machine provides hot melt slurry through the extrusion system and injects into the molding chamber (30); after the hot melt slurry is cooled for 30-60 seconds, the plastic base (2001) is formed; Step 5, the first time the ejection system linkage upper die moves up, the upper die (20) moves up relative to the lower die (10) by a first distance, the upper die core (21) is demoulded from the plastic base (2001), and the second drive rod (22) is linked to the right side (13) to move outward to complete the demoulding with the plastic base (2001); Step 6, the second time the ejection system linkage upper die moves up, the upper die (20) moves up relative to the lower die (10) by a second distance, the second drive rod (22) is linked to the right side (13) to move outward to the maximum stroke and link the die core moving plate (14) to move up, while the middle core column (151) moves down relative to the die core moving plate (14), the first drive rod (152) is linked to the side insert block (12) to move inward to complete the demoulding with the plastic base (2001); Step 7, the ejection system linkage ejector plate (16) moves up, the ejector pin (161) protrudes upward from the surface of the lower cavity (111), and the plastic base (2001) is ejected from the lower cavity (111) to unload; Step 8, repeat steps 2-7 to continuously injection mold the motor collector ring (200) and unload.

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