Motor case forming die

Abstract

The application discloses a motor box forming die, which comprises an upper die assembly and a lower die assembly matched with each other, the upper die assembly comprises an upper die box body and an upper die core arranged in the upper die box body, the lower die assembly comprises a lower die box body and a lower die core arranged in the lower die box body, the upper die core adopts a left-right split type splicing structure and comprises a left upper die core and a right upper die core spliced with each other along a horizontal direction, the lower die core also adopts a left-right split type splicing structure and comprises a left lower die core and a right lower die core spliced with each other along a horizontal direction, the upper die core and the lower die core jointly form a die cavity when they are matched with each other, a mounting hole is formed in the lower die core, a sleeve top rod mechanism comprises a top rod and a replaceable bushing, the replaceable bushing is detachably embedded in the mounting hole, the top rod is slidably arranged in the replaceable bushing, and the front end of the top rod is used for extending into the die cavity to perform a ejection action. The application can effectively reduce the manufacturing cost and maintenance cost of the die and improve the replacement efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of injection molding molds, specifically to a motor housing molding mold. Background Technology

[0002] In the field of injection molding of motor housings, traditional injection molds typically use a one-piece mold core. While this one-piece mold core has a simple structure and good overall rigidity, it has many shortcomings in actual production and use.

[0003] Firstly, the manufacturing of one-piece mold cores requires machining as a whole, which is difficult and demands high-end equipment, resulting in high mold manufacturing costs. When a part of the mold core wears or is damaged, the entire mold core often needs to be replaced, leading to extremely high repair costs and long repair cycles, severely impacting production efficiency.

[0004] Secondly, the ejector mechanism in existing injection molds typically uses a structure where the ejector pin is directly inserted into the mold core. During the injection molding process, the ejector pin needs to repeatedly extend and retract to eject the molded workpiece from the mold. The long-term relative movement between the ejector pin and the mold core can easily cause wear and burrs at the contact points. Once burrs are generated, it not only affects the smoothness of the ejector pin's movement but may also leave marks on the surface of the workpiece during ejection, affecting product quality.

[0005] Currently, when wear or burrs appear in the ejector pin channel within the mold core, the common approach is to replace the entire mold core or disassemble and repair it. Replacing the entire mold core is extremely costly, and the disassembly and assembly process is complex, requiring professional personnel and resulting in significant equipment downtime. Repairing the mold core, on the other hand, requires re-machining the ejector pin channel, which is not only cumbersome but also renders the mold core unusable due to dimensional discrepancies after multiple repairs.

[0006] Therefore, it is particularly important to design an injection mold for motor housing that can effectively reduce mold manufacturing and maintenance costs and improve replacement efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a motor housing molding die to solve the existing problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a motor housing molding die, comprising an upper mold assembly and a lower mold assembly that fit together. The upper mold assembly includes an upper mold housing and an upper mold core disposed within the upper mold housing. The lower mold assembly includes a lower mold housing and a lower mold core disposed within the lower mold housing. The upper mold core adopts a split-type splicing structure, which includes a left upper mold core and a right upper mold core spliced ​​together in the horizontal direction; the left upper mold core and the right upper mold core together constitute the upper mold core body, which is used to form the shape of the outer lower surface of the motor box workpiece.

[0009] The lower mold core adopts a split left-right splicing structure, which includes a lower left mold core and a lower right mold core spliced ​​together in the horizontal direction; the lower left mold core and the lower right mold core together constitute the main body of the lower mold core, which is used to form the internal shape and bottom structure of the motor housing workpiece; and the splicing surface of the lower mold core and the upper mold core is precision machined, and the gap of the splicing seam after splicing is relatively small, ultimately avoiding the formation of products with almost no seam lines in the middle; When the mold is closed, the upper mold core and the lower mold core are aligned to form a complete mold cavity for injection molding of motor housing parts. The contact surfaces of the upper and lower mold cores are matched to ensure the integrity and sealing of the mold cavity. The lower mold core has an axially extending mounting hole for mounting the sleeve push rod mechanism. A sleeve ejector mechanism includes an ejector rod and a replaceable bushing. The replaceable bushing is detachably fitted into the mounting hole. The ejector rod slides through the replaceable bushing, and the front end of the ejector rod is used to extend into the mold cavity to perform an ejection action. The inner wall of the replaceable bushing forms a sliding guide channel for the ejector rod. When the long-term reciprocating motion of the ejector rod causes wear or burrs on the inner wall of the replaceable bushing, the replaceable bushing can be directly removed from the mounting hole of the lower mold core and replaced with a new replaceable bushing without replacing the entire lower mold core.

[0010] Preferably, an L-shaped lifting platform is provided on the splicing surface where the lower left mold core and the lower right mold core mate. The L-shaped lifting platform extends along the width direction of the lower left mold core. A limiting notch that mates with the L-shaped lifting platform is provided at the bottom of the splicing surface where the lower right mold core and the lower left mold core mate. The bottom of the L-shaped lifting platform is threaded to the bottom of the limiting notch by a screw passing through the L-shaped lifting platform.

[0011] Preferably, the replaceable bushing and the mounting hole on the lower mold core are in a transition fit or interference fit to ensure that the replaceable bushing is securely installed in the lower mold core and does not move axially. One end of the replaceable bushing is provided with a limiting boss for limiting the axial position, and the limiting boss abuts against the end face of the lower mold core.

[0012] Preferably, the splicing surfaces of the upper left mold core and the upper right mold core are provided with mutually cooperating positioning structures to ensure the relative positional accuracy of the upper left mold core and the upper right mold core during splicing. The positioning structure includes a protrusion on the side of the upper left mold core and a groove on the side of the upper right mold core. The protrusion engages with the groove to ensure the splicing accuracy of the relative position of the upper left mold core and the upper right mold core after splicing.

[0013] Preferably, a left demolding assembly for forming the left side of the product, a right demolding assembly for forming the right side of the product, a front demolding assembly for forming the front of the product, and a rear demolding assembly for forming the rear of the product are slidably connected around the lower mold box. The left demolding assembly includes two first hydraulic cylinders fixed to the side of the lower mold box, a left mold base, and a left slider. The push rods of the two first hydraulic cylinders are connected to one side of the left mold base, and the other side of the left mold base is connected to the left slider. A left inclined block is provided on the left mold base. The right demolding assembly includes two second hydraulic cylinders fixed to the side of the lower mold housing, a right mold base, and a right slider. The push rods of the two second hydraulic cylinders are connected to one side of the right mold base, and the other side of the right mold base is connected to the right slider. The right mold base is provided with a right inclined block, and the right slider is provided with a liquid injection nozzle communicating with the lower mold core. The upper mold housing is provided with a liquid injection port communicating with the liquid injection nozzle. The aforementioned front demolding assembly includes a third hydraulic cylinder, a front mold base, and a front slider fixed to the front end of the lower mold box. The push rod of the third hydraulic cylinder is connected to one side of the front mold base, and the other side of the front mold base is connected to the front slider. A front inclined block is provided on the front mold base. The rear demolding assembly includes a fourth hydraulic cylinder, a rear mold base, and a rear slider fixed to the rear end of the lower mold box. The push rod of the fourth hydraulic cylinder is connected to one side of the rear mold base, and the other side of the rear mold base is connected to the rear slider. A rear inclined block is provided on the rear mold base.

[0014] Preferably, the upper mold box is provided with a left wedge block that cooperates with the left inclined block, a right wedge block that cooperates with the right inclined block, a front wedge block that cooperates with the front inclined block, and a rear wedge block that cooperates with the rear inclined block.

[0015] Preferably, the upper mold box has a guide hole on the left and right sides, and the lower mold box has guide rods around its sides that cooperate with the guide holes.

[0016] This invention also discloses an easy-maintain structure for a motor housing molding die, characterized in that it includes: The lower mold core is located inside the lower mold box. The lower mold core adopts a left and right split splicing structure, including a left lower mold core and a right lower mold core spliced ​​together in the horizontal direction. The lower mold core is provided with a longitudinally extending push rod channel. A replaceable bushing that is detachably and fixedly installed in the top rod channel; A push rod, which is slidably inserted axially into the replaceable bushing, is used to push the injection-molded workpiece. Preferably, the replaceable bushing is made of wear-resistant metal material, and the wear resistance of the replaceable bushing is lower than that of the ejector pin. Since the inner wall of the replaceable bushing and the outer wall of the ejector pin are in sliding fit, the hardness of the replaceable bushing is configured to be lower than that of the ejector pin, so that the replaceable bushing is the first wear part when the ejector pin reciprocates. When the replaceable bushing is worn, only the replaceable bushing needs to be replaced, while the ejector pin and the lower mold core can be reused.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. Since the upper mold assembly and the lower mold assembly are set independently, and both the upper mold core and the lower mold core adopt a left-right split splicing structure, each mold core component can be processed independently, which reduces the processing difficulty and the requirements for large processing equipment, significantly reducing the manufacturing cost of the mold. At the same time, when a mold core component is damaged, only the damaged half of the mold core needs to be replaced, without the need to replace the whole mold core, further reducing maintenance costs.

[0018] 2. Because a detachable and replaceable bushing is installed inside the lower mold core, the ejector pin slides directly against the inner wall of the replaceable bushing, transferring the original wear problem of the lower mold core to the replaceable bushing. When the replaceable bushing develops burrs or wear due to the long-term movement of the ejector pin, it is only necessary to remove the replaceable bushing from the lower mold core and replace it with a new one, making the operation simple and convenient.

[0019] 3. Because the replaceable bushing adopts an independent and detachable structure and has a lower hardness than the ejector pin, the replaceable bushing is a priority wear part, which effectively protects the lower mold core and ejector pin, extends the service life of the lower mold core and ejector pin, and further reduces the long-term use cost of the mold. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a motor housing in the prior art; Figure 2 This is a schematic diagram of the overall structure of a motor housing molding die in Example 1; Figure 3 This is a schematic diagram of the bottom structure of the lower mold assembly in Example 1; Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the bottom structure of the lower mold assembly in Example 1 without the lower right mold core installed; Figure 6 for Figure 5 Enlarged view of point B; Figure 7 This is a schematic diagram of the bottom structure of the lower mold assembly in Example 1 without the right mold base, left mold base, front mold base, and rear mold base installed. Figure 8 This is a schematic diagram of the combined structure of the lower mold core in Example 1. Figure 1 ; Figure 9 This is a schematic diagram of the combined structure of the lower mold core in Example 1. Figure 2 ; Figure 10 This is an exploded structural diagram of the lower mold core in Example 1; Figure 11 This is a schematic diagram of the upper mold assembly; Figure 12 This is a schematic diagram of the bottom structure of the upper mold assembly; Figure 13 This is a schematic diagram of the combined structure of the upper mold core in Example 1; Figure 14 This is an exploded structural diagram of the upper mold core in Example 1.

[0021] In the diagram: Upper mold assembly 1, upper mold housing 101, upper mold core 102, upper left mold core 1021, upper right mold core 1022; Lower mold assembly 2, lower mold housing 201, lower mold core 202, lower left mold core 2021, lower right mold core 2022; Mounting hole 3, ejector pin 4, replaceable bushing 5, L-shaped lifting platform 6, limiting notch 7, screw 8, limiting boss 9, groove 10, protrusion 11, left demolding assembly 12, right demolding assembly 13, front demolding assembly 14, rear demolding assembly 15, first hydraulic cylinder. 121. Left mold base; 122. Left slider; 123. Left inclined block; 124. Second hydraulic cylinder; 131. Right mold base; 132. Right slider; 133. Right inclined block; 134. Injection nozzle; 17. Injection port; 16. Third hydraulic cylinder; 141. Front mold base; 142. Front slider; 143. Front inclined block; 144. Fourth hydraulic cylinder; 151. Rear mold base; 152. Rear slider; 153. Rear inclined block; 154. Left wedge; 18. Right wedge; 19. Front wedge; 20. Rear wedge; 21. Guide hole; 22. Guide rod; 23. Motor box; 24. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example 1 Please see Figures 1-7 As shown, this embodiment discloses a method for processing such as Figure 1 The motor housing 24 is provided with a motor housing molding die, comprising an upper mold assembly 1 and a lower mold assembly 2 that fit together. The upper mold assembly 1 includes an upper mold housing 101 and an upper mold core 102 disposed within the upper mold housing 101. The lower mold assembly 2 includes a lower mold housing 201 and a lower mold core 202 disposed within the lower mold housing 201. The upper mold core 102 adopts a left-right split splicing structure, which includes a left upper mold core 1021 and a right upper mold core 1022 spliced ​​together in the horizontal direction; the left upper mold core 1021 and the right upper mold core 1022 together constitute the upper mold core body, which is used to form the shape of the outer lower surface of the motor box workpiece.

[0024] The lower mold core 202 adopts a split-type splicing structure, which includes a left lower mold core 2021 and a right lower mold core 2022 spliced ​​together horizontally. The left lower mold core 2021 and the right lower mold core 2022 together constitute the main body of the lower mold core, which is used to form the internal shape and bottom structure of the motor housing workpiece. Moreover, the splicing surface of the lower mold core 202 and the upper mold core 102 is precision machined, and the gap of the splicing seam after splicing is relatively small, ultimately avoiding the formation of a product with almost no gap in the middle. Seam line; Preferably, an L-shaped lifting platform 6 is provided on the splicing surface where the lower left mold core 2021 and the lower right mold core 2022 mate, the L-shaped lifting platform 6 extends along the width direction of the lower left mold core 2021, and a limiting notch 7 that mates with the L-shaped lifting platform 6 is provided at the bottom of the splicing surface where the lower right mold core 2022 and the lower left mold core 2021 mate, and the bottom of the L-shaped lifting platform 6 is threaded to the bottom of the limiting notch 7 by a screw 8 passing through the L-shaped lifting platform 6; When the mold is closed, the upper mold core 102 and the lower mold core 202 are aligned to form a complete mold cavity for injection molding of motor housing parts. The contact surfaces of the upper and lower mold cores are matched to ensure the integrity and sealing of the mold cavity. The lower mold core 202 has an axially extending mounting hole 3 inside, which is used to install the sleeve push rod mechanism. The sleeve ejector mechanism includes an ejector rod 4 and a replaceable bushing 5. The replaceable bushing 5 is detachably fitted into the mounting hole 3. The ejector rod 4 slides through the replaceable bushing 5, and the front end of the ejector rod 4 is used to extend into the mold cavity to perform an ejection action. The inner wall of the replaceable bushing 5 forms a sliding guide channel for the ejector rod. When the long-term reciprocating motion of the ejector rod causes wear or burrs on the inner wall of the replaceable bushing 5, the replaceable bushing 5 can be directly removed from the mounting hole 3 of the lower mold core 202 and replaced with a new replaceable bushing 5 without replacing the entire lower mold core.

[0025] Preferably, the replaceable bushing 5 and the mounting hole 3 on the lower mold core 202 are in transition fit or interference fit to ensure that the replaceable bushing 5 is securely installed in the lower mold core and does not move axially. One end of the replaceable bushing 5 is provided with a limiting boss 9 for limiting the axial position, and the limiting boss 9 abuts against the end face of the lower mold core.

[0026] Preferably, the splicing surfaces of the upper left mold core 1021 and the upper right mold core 1022 are provided with mutually cooperating positioning structures to ensure the relative positional accuracy of the upper left mold core 1021 and the upper right mold core 1022 during splicing. The positioning structure includes a protrusion 11 provided on the side of the upper left mold core 1021 and a groove 10 provided on the side of the upper right mold core 1022. The protrusion 11 engages with the groove 10 to ensure the splicing accuracy of the relative position of the upper left mold core 1021 and the upper right mold core 1022 after splicing. Preferably, a left demolding assembly 12 for forming the left side of the product, a right demolding assembly 13 for forming the right side of the product, a front demolding assembly 14 for forming the front of the product, and a rear demolding assembly 15 for forming the rear of the product are slidably connected around the lower mold box 201. The left demolding assembly 12 includes two first hydraulic cylinders 121 fixed to the side of the lower mold box 201, a left mold base 122 and a left slider 123. The push rods of the two first hydraulic cylinders 121 are connected to one side of the left mold base 122, and the other side of the left mold base 122 is connected to the left slider 123. A left inclined block 124 is provided on the left mold base 122. The right demolding assembly 13 includes two second hydraulic cylinders 131 fixed to the side of the lower mold housing 201, a right mold base 132, and a right slider 133. The push rods of the two second hydraulic cylinders 131 are connected to one side of the right mold base 132, and the other side of the right mold base 132 is connected to the right slider 133. A right inclined block 134 is provided on the right mold base 132, and an injection nozzle 17 communicating with the lower mold core 202 is provided on the right slider 133. An injection port 16 communicating with the injection nozzle 17 is provided on the upper mold housing 101. The front demolding assembly 14 includes a third hydraulic cylinder 141, a front mold base 142, and a front slider 143 fixed to the front end of the lower mold box 201. The push rod of the third hydraulic cylinder 141 is connected to one side of the front mold base 142, and the other side of the front mold base 142 is connected to the front slider 143. A front inclined block 144 is provided on the front mold base 142. The rear demolding assembly 15 includes a fourth hydraulic cylinder 151, a rear mold base 152, and a rear slider 153 fixed to the rear end of the lower mold housing 201. The push rod of the fourth hydraulic cylinder 151 is connected to one side of the rear mold base 152, and the other side of the rear mold base 152 is connected to the rear slider 153. A rear inclined block 154 is provided on the rear mold base 152.

[0027] Preferably, the upper mold box 101 is provided with a left wedge block 18 that cooperates with the left inclined block 124, a right wedge block 19 that cooperates with the right inclined block 134, a front wedge block 20 that cooperates with the front inclined block 144, and a rear wedge block 21 that cooperates with the rear inclined block 154.

[0028] Preferably, the upper mold box 101 is provided with a guide hole 22 on the left and right sides, and the lower mold box 201 is provided with guide rods 23 that cooperate with the guide holes 22.

[0029] To protect the structure of the quick-replaceable bushing of the mold, this embodiment also discloses an easy-maintain structure for a motor housing molding mold, including: The lower mold core 202 is located inside the lower mold box 201. The lower mold core 202 adopts a left and right split splicing structure, including a left lower mold core 2021 and a right lower mold core 2022 spliced ​​together in the horizontal direction. The lower mold core 202 has a longitudinally extending push rod channel, and the push rod channel is the mounting hole 3 above. A replaceable bushing 5 is detachably and fixedly installed in the top rod channel; The push rod 4 is slidably inserted into the replaceable bushing 5 along the axial direction and is used to push the injection-molded workpiece.

[0030] Preferably, the replaceable bushing 5 is made of wear-resistant metal material, and the wear resistance of the replaceable bushing 5 is lower than that of the ejector rod 4. Since the inner wall of the replaceable bushing 5 and the outer wall of the ejector rod 4 are in sliding fit, the hardness of the replaceable bushing 5 is configured to be lower than that of the ejector rod 4, so that the replaceable bushing 5 is the priority wear part when the ejector rod 4 reciprocates. When the replaceable bushing 5 is worn, only the replaceable bushing 5 needs to be replaced, while the ejector rod 4 and the lower mold core 202 can be reused.

[0031] In this embodiment, since both the upper mold core 102 and the lower mold core 202 adopt a left-right split structure, and are equipped with a replaceable bushing tube ejector mechanism, the mold has significant advantages such as low processing cost, convenient maintenance and long service life, and has good prospects for industrial promotion and application.

[0032] Its working process is as follows: After injection molding, the upper mold assembly and the lower mold assembly open. The ejector mechanism inside the injection molding machine, which drives the ejector pin 4, operates, pushing the ejector pin forward and pushing the ejector plate. The ejector plate drives the ejector pin fixing plate, which in turn drives the ejector pin 4 to slide forward axially. The front end of the ejector pin 4 passes through the replaceable bushing 5 and extends into the mold cavity, ejecting the molded workpiece away from the lower mold core 202. It should be noted that... The structure and connection relationship of the ejector rod, ejector plate, ejector rod fixing plate, and return spring included in the ejector rod ejection mechanism are conventional technologies in this field, and therefore will not be described in detail. After ejection is completed, the ejector pin of the injection molding machine retracts, and the elastic force of the return spring in the ejector pin ejection mechanism drives the ejector pin fixing plate and the ejector plate to retract backward, driving the ejector pin 4 to retract and reset, so that the front end of the ejector pin 4 retracts to a position flush with the surface of the lower mold core 202, ready for the next mold closing injection.

[0033] Since the replaceable bushing 5 is an independent and detachable component, and as a component that wears out quickly, it needs to be replaced periodically after prolonged use. The replaceable bushing 5 of this invention is easy to replace and does not require replacing the entire lower mold core 202. The specific replacement steps are as follows: 1. Remove the old replaceable bushing Remove the lower mold core 202 from the lower mold housing 201. At this point, the upper surface of the lower mold housing 201 will not press against the bottom of the replaceable bushing 5. Then, by applying a downward force to the replaceable bushing 5 in the direction of the mold cavity, the replaceable bushing 5 is slowly pushed out of the mounting hole 3. After the limiting boss 9 of the replaceable bushing 5 is completely disengaged from the lower end face of the lower mold core 202, remove the old replaceable bushing 5 from the bottom of the lower mold core 202. During this process, the inner wall of the mounting hole 3 remains intact and requires no repair processing.

[0034] 2. Install new replaceable bushings Step 1: Cleaning and inspection. Clean the inner wall of the mounting hole 3 of the lower mold core 202 to remove dust and debris, and check whether there are scratches or deformations on the inner wall of the mounting hole 3. If the inner wall of the mounting hole 3 is intact, the new replaceable bushing can be installed directly.

[0035] Step 2: Install the new replaceable bushing. Take the new replaceable bushing 5 and apply an appropriate amount of grease or anti-seize agent to its outer wall. Align the new replaceable bushing 5 with the mounting hole 3 from the bottom of the lower mold core 202, ensuring that the limiting boss 9 of the replaceable bushing 5 is away from the mold cavity. Use a pressing tool to press the new replaceable bushing 5 smoothly into the mounting hole 3 along the axial direction until the limiting boss 9 is tightly against the lower end face of the lower mold core 202 and flush with the bottom of the lower mold core 202. During the pressing process, ensure that the axis of the replaceable bushing 5 coincides with the axis of the mounting hole 3 to avoid skewing. Step 3: Simply install the lower mold core 202 into the lower mold housing 201. Disassembly is quick and easy, and it will not wear down the lower mold core 202, further reducing costs. Replacement is also convenient and quick, greatly improving mold maintenance efficiency.

[0036] Therefore, the present invention has the following advantages: 1. Since the upper mold assembly and the lower mold assembly are set independently, and both the upper mold core and the lower mold core adopt a left-right split splicing structure, each mold core component can be processed independently, which reduces the processing difficulty and the requirements for large processing equipment, significantly reducing the manufacturing cost of the mold. At the same time, when a mold core component is damaged, only the damaged half of the mold core needs to be replaced, without the need to replace the whole mold core, further reducing maintenance costs.

[0037] 2. Because a detachable and replaceable bushing is installed inside the lower mold core, the ejector pin slides directly against the inner wall of the replaceable bushing, transferring the original wear problem of the lower mold core to the replaceable bushing. When the replaceable bushing develops burrs or wear due to the long-term movement of the ejector pin, it is only necessary to remove the replaceable bushing from the lower mold core and replace it with a new one, making the operation simple and convenient.

[0038] 3. Because the replaceable bushing adopts an independent and detachable structure and has a lower hardness than the ejector pin, the replaceable bushing is a priority wear part, which effectively protects the lower mold core and ejector pin, extends the service life of the lower mold core and ejector pin, and further reduces the long-term use cost of the mold.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A motor housing molding die, comprising an upper mold assembly (1) and a lower mold assembly (2) that fit together, wherein the upper mold assembly (1) comprises an upper mold housing (101) and an upper mold core (102) disposed within the upper mold housing (101), and the lower mold assembly (2) comprises a lower mold housing (201) and a lower mold core (202) disposed within the lower mold housing (201), characterized in that: The upper mold core (102) adopts a left-right split splicing structure, which includes a left upper mold core (1021) and a right upper mold core (1022) spliced ​​together in the horizontal direction. The lower mold core (202) adopts a left and right split splicing structure, which includes a left lower mold core (2021) and a right lower mold core (2022) spliced ​​together in the horizontal direction. When the upper mold core (102) and the lower mold core (202) are closed, they together form a mold cavity; The lower mold core (202) has an installation hole (3) inside; The sleeve ejector mechanism includes an ejector rod (4) and a replaceable bushing (5), the replaceable bushing (5) being detachably fitted into the mounting hole (3), the ejector rod (4) being slidably inserted into the replaceable bushing (5), and the front end of the ejector rod (4) being used to extend into the mold cavity to perform an ejection action.

2. The motor housing forming mold according to claim 1, characterized in that: An L-shaped lifting platform (6) is provided on the splicing surface where the lower left mold core (2021) and the lower right mold core (2022) meet. The L-shaped lifting platform (6) extends along the width direction of the lower left mold core (2021). A limiting notch (7) that meets the L-shaped lifting platform (6) is provided at the bottom of the splicing surface where the lower right mold core (2022) and the lower left mold core (2021) meet. The bottom of the L-shaped lifting platform (6) is threaded to the bottom of the limiting notch (7) after passing through the L-shaped lifting platform (6) with a screw (8).

3. The motor housing forming mold according to claim 1, characterized in that: The replaceable bushing (5) and the mounting hole (3) on the lower mold core (202) are in transition fit or interference fit. One end of the replaceable bushing (5) is provided with a limiting boss (9) for limiting the axial position.

4. The motor housing forming mold according to claim 1, characterized in that: The upper left mold core (1021) and the upper right mold core (1022) are provided with mutually cooperating positioning structures on their splicing surfaces to ensure the relative position accuracy of the upper left mold core (1021) and the upper right mold core (1022) during splicing. The positioning structure includes a protrusion (11) on the side of the upper left mold core (1021) and a groove (10) on the side of the upper right mold core (1022). The protrusion (11) engages with the groove (10).

5. The motor housing forming mold according to claim 1, characterized in that: The lower mold box (201) is slidably connected around its perimeter with a left demolding assembly (12) for forming the left side of the product, a right demolding assembly (13) for forming the right side of the product, a front demolding assembly (14) for forming the front of the product, and a rear demolding assembly (15) for forming the rear of the product. The left demolding assembly (12) includes two first hydraulic cylinders (121) fixed to the side of the lower mold box (201), a left mold base (122) and a left slider (123). The push rods of the two first hydraulic cylinders (121) are connected to one side of the left mold base (122), and the other side of the left mold base (122) is connected to the left slider (123). A left inclined block (124) is provided on the left mold base (122). The right demolding assembly (13) includes two second hydraulic cylinders (131) fixed to the side of the lower mold box (201), a right mold base (132), and a right slider (133). The push rods of the two second hydraulic cylinders (131) are connected to one side of the right mold base (132), and the other side of the right mold base (132) is connected to the right slider (133). The right mold base (132) is provided with a right inclined block (134), and the right slider (133) is provided with an injection nozzle (17) communicating with the lower mold core (202). The upper mold box (101) is provided with an injection port (16) communicating with the injection nozzle (17). The front demolding assembly (14) includes a third hydraulic cylinder (141), a front mold base (142), and a front slider (143) fixed to the front end of the lower mold box (201). The push rod of the third hydraulic cylinder (141) is connected to one side of the front mold base (142), and the other side of the front mold base (142) is connected to the front slider (143). A front inclined block (144) is provided on the front mold base (142). The rear demolding assembly (15) includes a fourth hydraulic cylinder (151), a rear mold base (152), and a rear slider (153) fixed to the rear end of the lower mold box (201). The push rod of the fourth hydraulic cylinder (151) is connected to one side of the rear mold base (152), and the other side of the rear mold base (152) is connected to the rear slider (153). A rear inclined block (154) is provided on the rear mold base (152).

6. The motor housing forming mold according to claim 5, characterized in that: The upper mold box (101) is provided with a left wedge (18) that cooperates with the left inclined block (124), a right wedge (19) that cooperates with the right inclined block (134), a front wedge (20) that cooperates with the front inclined block (144), and a rear wedge (21) that cooperates with the rear inclined block (154).

7. The motor housing forming mold according to claim 5, characterized in that: The upper mold box (101) is provided with a guide hole (22) on the left and right sides, and the lower mold box (201) is provided with a guide rod (23) that cooperates with the guide hole (22) on the sides.

8. A maintenance-friendly structure for a motor housing molding die, characterized in that, include: The lower mold core (202) is located inside the lower mold box (201). The lower mold core (202) adopts a left and right split splicing structure, including a left lower mold core (2021) and a right lower mold core (2022) spliced ​​together in the horizontal direction. The lower mold core (202) has a longitudinally extending push rod channel. Replaceable bushing (5) that is detachably and fixedly installed in the top rod channel; The push rod (4) is slidably inserted into the replaceable bushing (5) along the axial direction and is used to push the injection-molded workpiece.

9. The easy-maintain structure of a motor housing molding die according to claim 8, characterized in that, The replaceable bushing (5) is made of wear-resistant metal material, and the wear resistance of the replaceable bushing (5) is lower than that of the top rod (4).

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