Pipe fitting part mold with replaceable mold core
By designing a pipe fitting and fitting mold with replaceable cores, the problem of lack of flexibility in the production of PVC-U drainage pipe fitting accessories is solved, and the rapid replacement of the core and the improvement of production efficiency is achieved, ensuring product quality and accuracy.
Patent Information
- Application Number
- CN202421187140.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In the production of PVC-U drainage pipe fittings, due to unstable material composition and seasonal changes, the product shape becomes larger and the product mouth size becomes smaller, making it difficult to meet quality standards, and the injection molded core lacks flexibility and cannot meet different production needs.
Design a pipe fitting accessories mold with replaceable cores, and quickly replace the core by disassemblying the core tiles to meet the injection molding needs of different pipe fitting accessories. The mold includes A plate, B plate and bottom plate. B plate can be detachably installed on the bottom plate, A plate and B plate can be detachably connected, and the core can be slidably installed on the B plate, and the core is installed through the mounting part.
It realizes rapid replacement of cores, adapts to different production needs, improves product quality and production efficiency, and ensures the coordination accuracy and quality standards of pipe fittings and fittings.
Smart Images
Figure CN222768878U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding equipment, and more specifically, to a pipe fitting mold with a replaceable core. Background Art
[0002] In the production of PVC pipe fittings, injection molding machines are generally used for production, and different PVC products are produced by setting different injection molds. In actual production, due to the instability of material composition and the changes in the spring, summer, autumn and winter seasons, the ellipticity of the product shape becomes larger. At the same time, the size of the product mouth will become smaller due to the lack of support points in the product space, which does not meet the product size quality standards and does not match the pipe well. Therefore, it is necessary to put forward requirements for the core during injection molding to ensure that it can properly support the internal shape of the product. At present, some manufacturers at home and abroad have carried out research on PVC-U drainage pipe fittings, but most of them are limited to traditional processing methods such as adding and subtracting steel in the cavity to meet the functional requirements of the product. There are still certain unstable factors for the precision brought by the forming of PVC-U drainage pipe fittings. With the continuous deepening of related research, the ellipticity product size quality standard has gradually developed from theoretical research to quantitative research. The quality and production efficiency of the product need to be improved, and there is no more perfect solution. In the future, the matching precision requirements of high-quality PVC-U drainage pipe fittings will be higher. In actual production, due to the instability of material composition, there is currently only one model core in a set of models. With the changes of the four seasons, there are floating changes in the product coordination position and shape per unit time. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a pipe fitting mold with a replaceable core, which can be replaced by disassembling the core block to adapt to different pipe fitting injection molding requirements and realize rapid replacement of the core.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pipe fitting mold with a replaceable core, comprising an A plate, a B plate and a bottom plate, the B plate being detachably mounted on the bottom plate, the A plate being arranged directly above the B plate, the A plate and the B plate being detachably connected, a mold core being arranged between the A plate and the B plate, core blocks being respectively arranged at both ends of the mold core along the axial direction, the core blocks being mounted on the B plate and slidably connected thereto, a mounting portion for mounting the core being provided on a side of the core block close to the mold core, the mold core comprising an upper mold core and a lower mold core, the upper mold core being fixed to the lower surface of the A plate, the lower mold core being fixed to the upper surface of the B plate, and a cavity for accommodating the core being formed between the upper mold core and the lower mold core.
[0005] In this technical solution, when producing pipe fittings, firstly, force is continuously applied to the A plate and the B plate, so that the upper mold core installed on the A plate and the B plate is in close contact with the lower mold core, so as to ensure that there will be no leakage in the subsequent injection molding process. The core block is fixed at both ends of the mold core, and the openings at both ends of the mold core are blocked to ensure the closedness of the injection molding space during the injection molding process. The upper mold core and the lower mold core are pressed together to form a cavity, which can only determine the external shape of the pipe fitting, while the interior of the pipe fitting is a hollow structure, and a structure is required to maintain the internal structure of the pipe fitting during injection molding. A mounting portion is also provided on one side of the core block close to the mold core, and a core is installed on the mounting portion. When the core block is in close contact with both ends of the mold core, the core is also inserted into the cavity. The injection molding space is a closed space enclosed by the core, the core block, the upper mold core and the lower mold core, wherein the core block is inserted into the cavity, and the space occupied by the core is the internal space of the pipe fitting after injection molding. The A plate is also provided with an injection port, and an injection channel is provided below the injection port to connect to the mold core. After the material is injected into the injection port, the upper mold core, the lower mold core and the core block are opened after the material is cooled and solidified to complete the injection molding production process of the pipe fittings. Due to the instability of the material composition and the changes in the spring, summer, autumn and winter seasons, the ellipticity of the product shape becomes larger, and the size of the product mouth will become smaller due to the lack of support points in the product vacancy, which does not meet the product size quality standard and does not match the pipe material well. Therefore, different requirements need to be put forward for the core during injection molding under different states. The core block is detachably mounted on the upper surface of the B plate and slidably connected thereto. When the injection molding is completed and the product needs to be taken out, the A plate and the B plate are opened and the core block is slid on the B plate until the core is removed from the cavity, and the product can be taken out. When the core needs to be replaced, the core block can be disassembled and slid out of the B plate, and the core located on the core block is replaced and then the core block is installed back, thereby realizing the replacement of different cores to meet the injection molding requirements of pipe fittings under different conditions.
[0006] Preferably, a plurality of slide rails are installed on the upper surface of the B plate, and each of the slide rails is respectively installed on both sides of the mold core along the axial ends, and both sides of the core block are respectively slidably connected to the slide rails.
[0007] Preferably, it also includes a fixing pin, and the A plate and the B plate are both provided with through holes, and the fixing pin is inserted into the through holes on the A plate and the B plate so that the fixing pin abuts against a side of the core block away from the mold core.
[0008] Preferably, a surface of the core block away from the mold core has an inclined surface inclined from top to bottom in a direction away from the mold core, and the fixing pin is parallel to the inclined surface of the core block.
[0009] Preferably, the mounting portion is a countersunk structure, and the end of the core is inserted into the countersunk structure in the mounting portion.
[0010] Preferably, a first threaded hole is provided at the bottom of the countersunk hole of the mounting portion, a second threaded hole is provided at the end of the core, and the first threaded hole is threadedly connected to the second threaded hole.
[0011] Preferably, the core includes a first body and a second body, the first body and the second body are respectively inserted into the cavity from both ends, a protruding block is provided on the end face of one end of the first body inserted into the cavity, and the other end of the first body is connected to the core block, a connecting groove is provided on the end face of one end of the second body inserted into the cavity, and the other end of the second body is connected to the core block, and the protruding block on the first body can be inserted into the connecting groove of the second body.
[0012] Preferably, raised portions are provided at the four corners of the lower surface of the upper mold core, and grooves are provided on the upper surface of the lower mold core corresponding to the raised portions, and the raised portions can be inserted into the grooves.
[0013] Preferably, a support member is further provided between the B plate and the bottom plate so that there is an overhead space between the B plate and the bottom plate, and the overhead space is provided with an ejection portion, which passes through the B plate and is slidably connected to the B plate, and the upper end of the ejection portion abuts against the bottom surface of the A plate.
[0014] Preferably, the ejection portion includes an ejector pin, an ejector pin plate and an elastic member, the ejector pin plate is installed in the overhead space between the bottom plate and the B plate, the lower end of the ejector pin is fixedly connected to the ejector pin plate, the upper end of the ejector pin passes through the B plate and abuts against the bottom surface of the A plate, and the two ends of the elastic member abut against the ejector pin plate and the B plate respectively.
[0015] Compared with the prior art, the beneficial effects of the technical solution are as follows: the core block is detachably connected to the B plate, and the core installed on the core block can be quickly replaced. A slide rail is fixed on the B plate, and the core block is slidably connected to the slide rail, which is convenient for determining the position and movement trajectory of the core block when removing and installing the core block, and ensuring that the position of the core block will not be offset or collide with other components. A fixing pin is provided to ensure that the core block will not be offset after moving to the preset position. The core block is provided with an inclined surface, which forms a triangular support structure for the side of the core block close to the mold core. The fixing pin is parallel to and abuts the inclined surface, which increases the contact area between the fixing pin and the core block. The lower end of the fixing pin extends out of the surface of the B plate, so that when removing the fixing pin, the part of the fixing pin extending out of the surface of the B plate can be directly pushed by hand. A protruding block and a connecting groove are provided at the connection between the first body and the second body to ensure the coaxiality of the first body and the second body. The upper die core and the lower die core are provided with protrusions and grooves, which ensure that the upper die core and the lower die core are aligned in the vertical direction and avoid deviation between the upper die core and the lower die core. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional diagram of a pipe fitting mold with a replaceable core according to the utility model;
[0017] Figure 2 It is an exploded view of the pipe fitting mold with replaceable core of the utility model;
[0018] Figure 3 It is a three-dimensional diagram of the pipe fitting mold with replaceable core of the utility model after removing the A plate and the upper mold core;
[0019] Figure 4 It is a three-dimensional diagram of a core block of a pipe fitting mold with a replaceable core according to the utility model;
[0020] Figure 5 It is a three-dimensional diagram of the core of the pipe fitting mold with replaceable core of the utility model;
[0021] Figure 6 It is a three-dimensional diagram of the first body of the pipe fitting mold with replaceable core of the utility model;
[0022] Figure 7 It is a stereoscopic view of the second body of the pipe fitting mold with replaceable core of the utility model.
[0023] In the accompanying drawings: 1. Plate A; 2. Plate B; 3. Support member; 4. Bottom plate; 5. Mold core; 6. Core block; 7. Core; 8. Slide rail; 9. Fixing pin; 10. Ejector portion; 11. Ejector pin; 12. Ejector pin plate; 13. Elastic member; 41. Overhead space; 51. Upper mold core; 52. Lower mold core; 61. Mounting portion; 62. First threaded hole; 63. Inclined surface; 71. First body; 72. Second body; 73. Second threaded hole; 511. Protrusion; 521. Concave groove; 711. Protrusion block; 721. Connecting groove. DETAILED DESCRIPTION
[0024] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.
[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0026] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0027] Example 1
[0028] like Figure 1 , 2As shown in Figure 4, a pipe fitting mold with a replaceable core includes an A plate 1, a B plate 2 and a bottom plate 4, wherein the B plate 2 is mounted on the bottom plate 4, the A plate 1 is arranged directly above the B plate 2, the A plate 1 and the B plate 2 are detachably connected, a mold core 5 is arranged between the A plate 1 and the B plate 2, and core blocks 6 are respectively arranged at both ends of the mold core 5 along the axial direction, the core block 6 is mounted on the B plate 2 and slidably connected thereto, and a mounting portion 61 for mounting a core 7 is provided on a side of the core block 6 close to the mold core 5, the mold core 5 includes an upper mold core 51 and a lower mold core 52, the upper mold core 51 is fixed to the lower surface of the A plate 1, the lower mold core 52 is fixed to the upper surface of the B plate 1, and a cavity for accommodating the core 7 is formed between the upper mold core 51 and the lower mold core 52. When producing pipe fittings, the bottom plate 4 is mounted on the injection molding machine, the B plate is fixed on the bottom plate, and the A plate 1 is arranged directly above the B plate 2. First, continuously apply force to the A plate 1 and the B plate 2, so that the upper mold core 51 installed on the A plate 1 and the B plate 2 is in close contact with the lower mold core 525, to ensure that there will be no leakage in the subsequent injection molding process. The core block 6 is fixed to the two ends of the mold core 5, and the openings at both ends of the mold core 5 are blocked to ensure the closedness of the injection molding space during the injection molding process. The upper mold core 51 and the lower mold core 52 are pressed together to form a cavity, which can only determine the external shape of the pipe fitting, while the interior of the pipe fitting is a hollow structure, and a structure is required to maintain the internal structure of the pipe fitting during injection molding. A mounting portion 61 is also provided on one side of the core block 6 close to the mold core 5, and a core 7 is installed on the mounting portion 61. When the core block 6 is in close contact with both ends of the mold core 5, the core 7 is also inserted into the cavity. The injection molding space is a closed space enclosed by the core 7, the core block 6, the upper mold core 51 and the lower mold core 525. The core block 6 is inserted into the cavity, and the space occupied by the core 7 is the internal space of the pipe fitting after injection molding. An injection molding port is also provided on the A plate 1, and an injection molding channel is provided below the injection molding port and connected to the mold core 5. After the material is injected into the injection molding port, the upper mold core 51, the lower mold core 52 and the core block 6 are opened after the material is cooled and solidified, and the injection molding production process of the pipe fitting is completed. Due to the instability of material composition and the changes in the spring, summer, autumn and winter seasons, the ellipticity of the product shape becomes larger. At the same time, the size of the product mouth will become smaller due to the lack of support points in the product space, which does not meet the product size quality standards and does not match the pipe well. Therefore, different requirements need to be put forward for the core 7 during injection molding under different states. The core block 6 is detachably mounted on the upper surface of the B plate 2 and is slidably connected thereto. When the injection molding is completed and the product needs to be taken out, open the A plate 1 and the B plate 2 and slide the core block 6 on the B plate 2 until the core 7 is removed from the cavity, and the product can be taken out. When the core 7 needs to be replaced, just remove the core block 6, slide it out of the B plate 2, replace the core 7 on the core block 6, and then install the core block 6 back, thereby realizing the replacement of different cores 7 to meet the injection molding requirements of pipe fittings under different conditions.
[0029] like Figure 2 , Figure 3As shown, a plurality of slide rails 8 are installed on the upper surface of the B plate 2, and each slide rail 8 is installed on both sides of the two ends of the mold core 5 along the axial direction, and the two sides of the core block 6 are respectively connected to the slide rails 8 for sliding. The mold core 5 is located in the center between the A plate 1 and the B plate 2, so the upper and lower parts of the space around the mold core 5 are occupied by the A plate 1 and the B plate 2, so that the core block 6 can only move from the gap between the A plate 1 and the B plate 2 to the two ends of the mold core 2. Due to the obstruction of the A plate 1 and the B plate 2, it is difficult to fix the core block 6 after it moves and it is difficult to determine the position of the core block 6. Since the core block 6 is fixed with a core 7, the core 7 determines the internal structure of the pipe fittings. The deviation of the position of the core block 6 will cause the core 7 to deviate and then cause the internal structure of the pipe fittings after injection molding to change, resulting in unqualified products. Therefore, it is necessary to set a structure to guide the movement of the core block 6 between the A plate 1 and the B plate 2. The slide rails 8 are installed on the upper surface of the B plate 2, respectively installed at the two ends of the mold core 5, and the two sides of the core block 6 are connected to the slide rails 8 for sliding. The slide rail 8 has a limiting effect on the movement of the core block 6, so that the core block 6 can only move along the length direction of the slide rail 8. The slide rail 8 is installed on the upper surface of the B plate 2 and cannot move. It is only necessary to ensure that the position of the slide rail 8 is correct to ensure that the position of the core block 6 will not deviate. After the core block 6 moves to the two ends of the mold core 5, it is only necessary to lock the movement of the core block 6 along the slide rail 8 in a direction away from the mold core 5 to achieve the fixation of the position of the core block 6. The core block 6 can slide out from the end of the slide rail 8 away from the mold core 5. When the core block 6 needs to be removed, it is only necessary to slide the core block 6 out of the slide rail 8, and the installation is the same.
[0030] like Figure 2 As shown, it also includes a fixing pin 9. Both the A plate 1 and the B plate 2 are provided with through holes. The fixing pin 9 is inserted into the through holes on the A plate 1 and the B plate 2 so that the fixing pin 9 abuts against the side of the core block 6 away from the mold core 5. When the injection molding operation is performed, the core block 6 squeezed by the material will move along the slide rail 8 in the direction away from the mold core 5. After the fixing pin 9 is inserted into the through holes provided on the A plate 1 and the B plate 2, it just abuts against the side of the core block 6 away from the mold core 5. When the core block 6 is subjected to the pressure of the material being squeezed outward, the fixing pin 9 abuts against the core block 6, providing a supporting force for the core block 6 in the direction of the mold core 5, offsetting the outward squeezing force of the material, and ensuring that the core block 6 will not be displaced.
[0031] like Figure 2 As shown, the side of the core block 6 away from the mold core 5 has an inclined surface 63 inclined from top to bottom in the direction away from the mold core 5, and the fixing pin 9 is parallel to the inclined surface 63 of the core block 6. The side of the core block 6 close to the mold core 5 needs to withstand the extrusion force of the material during injection molding. The inclined surface 63 provided on the core block 6 forms a triangular support structure for the side of the core block 6 close to the mold core 5. The fixing pin 9 is also inclined at a certain angle and parallel to the inclined surface 63 of the core block 6, so that the fixing pin 9 and the core block 6 have a larger contact surface.
[0032] like Figure 4 As shown, the mounting portion 61 is a countersunk hole structure, and the end of the core 7 is inserted into the countersunk hole in the mounting portion 61. When the core 7 is inserted into the mounting portion 61, the outer peripheral surface of the portion of the core 7 inserted into the mounting portion 61 conflicts with the hole wall of the countersunk hole structure of the mounting portion 61 in all directions, so that the position of the core 7 in the vertical direction is determined by the countersunk hole structure.
[0033] like Figure 4 , Figure 5 As shown, the bottom of the countersunk hole of the mounting portion 61 is provided with a first threaded hole 62, and the end of the core 7 is provided with a second threaded hole 73, and the first threaded hole 62 is threadedly connected with the second threaded hole 73. The mounting portion 61 and the core 7 are threadedly connected through the first threaded hole 62 and the second threaded hole 73, which ensures the stability of the connection. When the core 7 needs to be replaced, it is only necessary to screw out the connected bolts to realize the disassembly of the core 7, and then insert the required core 7 into the mounting portion 61, and screw the bolts into the first threaded hole 62 and the second threaded hole 73, and the replacement of the core 7 can be completed.
[0034] Example 2
[0035] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 6 , 7 As shown, the core 7 includes a first body 71 and a second body 72, the first body 71 and the second body 72 are respectively inserted into the cavity from both ends, a protruding block 711 is provided on the end surface of one end of the first body 71 inserted into the cavity, and the other end of the first body 71 is connected to the core block 6, a connecting groove 721 is provided on the end surface of one end of the second body 72 inserted into the cavity, and the other end of the second body 72 is connected to the core block 6, and the protruding block 711 on the first body 71 can be inserted into the connecting groove 721 of the second body 72. The insertion of the protruding block 711 into the connecting groove 721 can ensure the coaxiality of the first body 71 and the second body 72, and avoid the deviation of the relative position of the first body 71 and the second body 72, which causes the pipe fittings after injection molding to be unqualified.
[0036] Example 3
[0037] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 2 As shown, the four corners of the lower surface of the upper mold core 51 are provided with protrusions 511, and the upper surface of the lower mold core 52 is provided with grooves 521 corresponding to the protrusions 511, and the protrusions 511 can be inserted into the grooves 521. This arrangement can ensure that the upper mold core 51 and the lower mold core 52 are aligned in the vertical direction by inserting the protrusions 511 into the grooves 521, thereby avoiding the unqualified pipe fittings after injection molding due to the position deviation of the upper mold core 51 and the lower mold core 52.
[0038] like Figure 1 As shown, a support member 3 is also provided between the B plate 2 and the bottom plate 4 so that there is an overhead space 41 between the B plate 2 and the bottom plate 4. The overhead space 41 is provided with an ejector 10, which runs through the B plate 2 and is slidably connected to the B plate 2, and the upper end of the ejector 10 abuts against the bottom surface of the A plate 1. After the injection molding is completed, the ejector 10 moves upward. Since the ejector 10 is slidably connected to the B plate 2, the movement of the ejector 10 will not affect the B plate 2. At the same time, the upper end of the ejector 10 abuts against the bottom surface of the A plate 1. When the ejector 10 moves upward, the top of the ejector 10 will also push the A plate 1 to move upward, while the B plate 2 remains stationary, so that the distance between the A plate 1 and the B plate 2 is enlarged, and then separated, and the product can be taken out through the space between the A plate 1 and the B plate 2.
[0039] like Figure 2 As shown, the ejector 10 includes an ejector pin 11, an ejector plate 12 and an elastic member 13. The ejector plate 12 is installed in the space between the bottom plate 4 and the B plate 2. The lower end of the ejector pin 11 is fixedly connected to the ejector plate 12. The upper end of the ejector pin 11 passes through the B plate 2 and abuts against the bottom surface of the A plate 1. The two ends of the elastic member 13 abut against the ejector plate 12 and the B plate 2 respectively. An ejection hole is provided on the bottom plate 4. When the injection molding is completed, the injection molding machine applies force to the ejector plate 12 through the ejection hole, and starts the ejector pin 11 to move and push the A plate 1 and the B plate 2 apart. The elastic member 13 plays the role of automatic reset after ejection, and pushes the ejector plate 12 back to the initial position after the ejection is completed.
[0040] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.
Claims
1. A pipe fitting mold with a replaceable core, characterized in that: The invention comprises an A plate (1), a B plate (2), and a bottom plate (4), wherein the B plate (2) is mounted on the bottom plate (4), the A plate (1) is arranged directly above the B plate (2), the A plate (1) and the B plate (2) are detachably connected, a mold core (5) is arranged between the A plate (1) and the B plate (2), core blocks (6) are respectively arranged at two ends of the mold core (5) along the axial direction, and the core blocks (6) are mounted on the B plate (2) and connected to the mold core (5). The core block (6) is slidably connected, and a mounting portion (61) for mounting the core (7) is provided on a side of the core block (6) close to the mold core (5). The mold core (5) comprises an upper mold core (51) and a lower mold core (52). The upper mold core (51) is fixed to the lower surface of the A plate (1), and the lower mold core (52) is fixed to the upper surface of the B plate (2). A cavity for accommodating the core (7) is formed between the upper mold core (51) and the lower mold core (52).
2. A pipe fitting mold with a replaceable core according to claim 1, characterized in that: A plurality of slide rails (8) are installed on the upper surface of the B plate (2), and each of the slide rails (8) is installed on both sides of the mold core (5) along the axial direction, and both sides of the core block (6) are slidably connected to the slide rails (8).
3. A pipe fitting mold with a replaceable core according to claim 1, characterized in that: It also includes a fixing pin (9), and both the A plate (1) and the B plate (2) are provided with through holes, and the fixing pin (9) is inserted into the through holes on the A plate (1) and the B plate (2) so that the fixing pin (9) abuts against a side of the core block (6) away from the mold core (5).
4. A pipe fitting mold with a replaceable core according to claim 3, characterized in that: A side of the core block (6) away from the mold core (5) has an inclined surface (63) which is inclined from top to bottom in a direction away from the mold core (5), and the fixing pin (9) is parallel to the inclined surface (63) of the core block (6).
5. The pipe fitting mold with replaceable core according to claim 1, characterized in that: The mounting portion (61) is a countersunk hole structure, and the end of the core (7) is inserted into the countersunk hole in the mounting portion (61).
6. A pipe fitting mold with a replaceable core according to claim 5, characterized in that: A first threaded hole (62) is provided at the bottom of the countersunk hole of the mounting portion (61), a second threaded hole (73) is provided at the end of the core (7), and the first threaded hole (62) is threadedly connected to the second threaded hole (73).
7. A pipe fitting mold with a replaceable core according to claim 1, characterized in that: The core (7) comprises a first body (71) and a second body (72); the first body (71) and the second body (72) are respectively inserted into the mold cavity from two ends; a protruding block (711) is arranged on the end surface of one end of the first body (71) inserted into the mold cavity; the other end of the first body (71) is connected to the core block (6); a connecting groove (721) is arranged on the end surface of one end of the second body (72) inserted into the mold cavity; the other end of the second body (72) is connected to the core block (6); the protruding block (711) on the first body (71) can be inserted into the connecting groove (721) of the second body (72).
8. The pipe fitting mold with replaceable core according to claim 1, characterized in that: The four corners of the lower surface of the upper mold core (51) are provided with raised portions (511), and the upper surface of the lower mold core (52) is provided with grooves (521) corresponding to the raised portions (511), and the raised portions (511) can be inserted into the grooves (521).
9. The pipe fitting mold with replaceable core according to claim 1, characterized in that: A support member (3) is also provided between the B plate (2) and the bottom plate (4) so that an overhead space (41) is provided between the B plate (2) and the bottom plate (4); the overhead space (41) is provided with an ejection portion (10); the ejection portion (10) passes through the B plate (2) and is slidably connected to the B plate (2); the upper end of the ejection portion (10) abuts against the bottom surface of the A plate (1).
10. A pipe fitting mold with a replaceable core according to claim 9, characterized in that: The ejector portion (10) comprises an ejector pin (11), an ejector pin plate (12) and an elastic member (13); the ejector pin plate (12) is installed in a suspended position between the bottom plate (4) and the B plate (2); the lower end of the ejector pin (11) is fixedly connected to the ejector pin plate (12); the upper end of the ejector pin (11) passes through the B plate (2) and abuts against the bottom surface of the A plate (1); and the two ends of the elastic member (13) abut against the ejector pin plate (12) and the B plate (2) respectively.