An injection mold

Abstract

This invention provides an injection mold, relating to the field of injection molding technology. The mold includes a mold base and a mold cover. The mold cover has a first cavity, and the mold base has a second cavity. The mold cover is located on top of the mold base. When the mold cover and the mold base are connected, the first cavity and the second cavity are connected. The mold base also has a connecting hole, and the second cavity is connected to the connecting hole. A guide member is provided in the second cavity, including a first guide portion and a second guide portion that are connected. The first guide portion passes through the central hole of an insert and passes through the mold cover to connect to the injection tube. As the second guide portion moves away from the first guide portion, its size gradually increases, and it abuts against the insert. The second guide portion has a fixing rod that inserts into the connecting hole. An elastic element is provided in the connecting hole, and the elastic element abuts against the bottom end of the fixing rod. This improves the integrity of the insert injection molding and reduces indentations on the contact surface.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and more specifically to an injection mold. Background Technology

[0002] Inserts are embedded in a mold, and the surface of the inserts is injection molded to obtain an injection-molded product covered by the inserts. To prevent the inserts from falling off, fasteners are usually used to secure them. However, during the injection molding process, because there is a contact area between the fastener and the insert, the fastener at this contact area blocks the injection liquid from flowing into the surface of the insert at the contact area, affecting the coverage of the insert at the contact area and causing problems such as incomplete coverage or indentations. Summary of the Invention

[0003] The purpose of this invention is to provide an injection mold, and the technical problem to be solved is to improve the coverage integrity of insert injection molding and reduce indentations on the contact surface.

[0004] This invention is achieved through the following technical solution: An injection mold includes a mold base and a mold cover, wherein the mold cover has a first cavity and the mold base has a second cavity, and the mold cover is disposed on the top of the mold base. When the mold cover and the mold base are connected, the first cavity and the second cavity are connected. The aforementioned mold base is also provided with a connecting hole, and the aforementioned second cavity is connected to the connecting hole; The second cavity described above is provided with a flow guide, which includes a first flow guide portion and a second flow guide portion that are connected. The aforementioned first guide section is used to pass through the center hole of the insert and through the mold cap to connect to the injection tube; As the second guide portion moves away from the first guide portion, the size of the second guide portion gradually increases, and the second guide portion is used to abut against the insert; The second guide section is provided with a fixing rod, which is inserted into a connecting hole. An elastic element is provided in the connecting hole, and the elastic element abuts against the bottom end of the fixing rod.

[0005] The first cavity on the mold cover and the second cavity on the mold base are connected when the mold cover and the mold base are connected. This design allows the plastic melt to flow smoothly from the first cavity into the second cavity or from the second cavity into the first cavity, achieving continuity and uniformity in injection molding, thereby improving the integrity of the insert injection molding.

[0006] The connecting holes on the mold base, through the cooperation of the elastic element and the fixing rod, provide stable support for the guide element, thereby providing support and positioning for the insert. The guide element directs the molten plastic to the lower end face of the insert, and injecting the molten plastic from the lower end face solves the problem that when the molten plastic is injected from the upper end face of the insert, it cannot cover the lower end face. This method ensures that the molten plastic can uniformly and fully cover the insert surface, enhancing the encapsulation effect of the injection molding. As the second guide portion moves away from the first guide portion, its size gradually increases, which helps reduce the resistance of the plastic melt during flow, allowing the melt to more smoothly cover the insert surface. Simultaneously, the second guide portion abuts against the insert, ensuring the stability of the insert during injection molding and preventing positional shifts from affecting the injection molding effect.

[0007] The elastic element inside the aforementioned connecting hole abuts against the bottom end of the fixing rod, which not only plays a buffering role during the injection molding process, reducing the direct contact pressure between the insert and the mold, but also reduces or avoids indentations on the surface of the insert.

[0008] Furthermore, the injection mold is also provided with an ejector, which passes through the mold base and connects to the guide member; the ejector is used to apply thrust to the guide member, causing the guide member to move up and down.

[0009] The main function of the ejector is to apply a thrust to the guide component after injection molding, causing it to move upward, thereby facilitating the demolding of the insert and the injection molded part.

[0010] The ejector mechanism described above ensures smooth separation of the insert and the injection-molded part during the demolding process. After injection molding, the ejector applies a pushing force, causing the guide component and the insert to move upwards together, thus easily removing the insert and injection-molded part from the mold. This greatly simplifies the demolding process and improves production efficiency.

[0011] The aforementioned connection design between the ejector and the guide helps maintain the stability and compactness of the mold structure. The ejector passes through the mold base and connects to the guide; this connection method not only ensures the effective transmission of thrust but also makes the overall mold structure more compact and stable, improving the mold's service life and reliability.

[0012] After the plastic melt is filled, the guide can be moved downward by the ejector. Since the plastic melt has been filled, the position of the insert is not significantly affected by the movement of the guide. Therefore, by moving the guide downward, the second guide part no longer contacts the insert, further reducing the indentation on the surface of the insert.

[0013] Furthermore, the first guide section includes a guide column, on which a plurality of guide holes are arranged, the length direction of which is the same as the axial direction of the guide column.

[0014] The aforementioned guide pillars, as the main component of the first guide section, ensure stable guidance of the molten plastic as it flows into the second cavity, preventing turbulence during melt flow. This design allows the melt to more evenly cover the surface of the insert, thereby improving the integrity of the injection molding coating.

[0015] The aforementioned flow guide holes provide flow channels for the melt. The flow guide holes are axially aligned with the flow guide columns, meaning that the melt can flow smoothly along these channels, further enhancing the melt's coverage effect on the insert surface.

[0016] In summary, the first flow guiding section, including the design of the flow guiding column and several flow guiding holes arranged on the flow guiding column, further improves the encapsulation integrity of the insert injection molding and reduces indentation on the contact surface by optimizing the flow path and flow state of the melt.

[0017] Furthermore, the second flow guide includes a flow guide plate, the flow guide plate having a raised center, and the raised position of the flow guide plate being connected to the first flow guide. Starting from the raised position of the aforementioned guide plate, guide grooves are arranged on the aforementioned guide plate; The aforementioned guide grooves and guide holes are set accordingly.

[0018] The raised central section of the aforementioned guide plate makes it smoother after connecting with the first guide section. Starting from the raised end, the guide grooves on the guide plate are arranged to correspond to the guide holes on the first guide section. This design allows the melt to flow smoothly through the guide grooves when flowing from the first guide section into the second guide section, further enhancing the fluidity and uniformity of the melt on the insert surface.

[0019] Due to the corresponding arrangement of the aforementioned flow channels and flow holes, the melt can form a continuous flow channel during the flow process, avoiding the splitting and turbulence of the melt during the flow process; this design helps to reduce the impact and pressure of the melt on the insert surface, thereby reducing or avoiding the formation of indentations.

[0020] Furthermore, along the direction away from the first guide section from the second guide section, the width of the guide groove gradually increases.

[0021] The gradual increase in the width of the aforementioned guide channels means that the melt has more space during its flow.

[0022] Firstly, as the melt flows from the first guide section to the second guide section, the resistance to the melt during the flow process is reduced. As the width of the guide channel increases, the obstacles encountered by the melt during the flow process gradually decrease, allowing the melt to more smoothly cover the insert surface, ensuring the melt's fluidity and coverage.

[0023] Secondly, it helps the melt to better fill the complex structure of the insert. When the melt flows through the gradually widening guide channel, it can more smoothly enter every corner and small space of the insert, reducing injection dead zones and material shortages, thereby improving the integrity of the injection molding coating.

[0024] Furthermore, a protrusion is formed between adjacent guide grooves, which is used to abut the insert.

[0025] The aforementioned protrusions ensure a tighter contact between the second guide section and the insert. During injection molding, these protrusions directly abut against the surface of the insert, ensuring its stable position in the mold and preventing movement or deformation under melt pressure. This helps ensure that the melt evenly covers all parts of the insert during injection molding, improving encapsulation integrity.

[0026] The aforementioned protrusions also reduce the direct contact area between the insert and the mold, thereby lowering the risk of indentation caused by melt pressure. During injection molding, the melt exerts pressure on the insert and mold as it flows. If the contact area between the insert and the mold is too large, indentation can easily occur. The presence of protrusions can disperse this pressure, reducing direct pressure on the insert surface and effectively minimizing indentation formation.

[0027] In summary, by setting protrusions between adjacent guide channels, the encapsulation integrity of insert injection molding can be further improved, and indentations on the contact surface can be reduced.

[0028] Furthermore, the transverse cross-section of the aforementioned guide channel is arc-shaped.

[0029] The arc-shaped flow channels described above can better guide the flow of the melt. This allows the melt to form smoother, more continuous flow lines during the injection molding process, reducing potential defects or flaws and improving the overall aesthetics of the product. Compared to straight or planar shapes, the arc-shaped cross-section can better adapt to the flow characteristics of the melt, reduce flow resistance, and allow the melt to flow more smoothly through the flow channels and cover the surface of the insert.

[0030] The aforementioned arc-shaped guide grooves also serve to disperse melt pressure. During injection molding, the melt exerts pressure on the inserts and the mold. The arc design can better disperse this pressure, preventing excessive pressure concentration in specific areas and thus reducing indentations on the contact surface.

[0031] Furthermore, a sealing ring is fitted onto the aforementioned fixing rod, and the sealing ring is connected to the connection hole; the sealing ring is used to seal the connection hole.

[0032] The aforementioned sealing ring is malleable, ensuring smooth movement of the flow guide; it effectively prevents molten plastic from entering the connecting hole during injection molding. During injection molding, the molten plastic flows under high temperature and pressure. If the connecting hole is not effectively sealed, the molten plastic may enter the connecting hole from the second cavity, affecting the movement of the flow guide. The use of the sealing ring ensures the sealing of the connecting hole, prevents molten plastic leakage, and guarantees the smooth progress of the injection molding process.

[0033] The aforementioned sealing ring also reduces the flow resistance of the melt at the connection hole. If there is a gap in the connection hole, the melt will experience additional resistance during flow, affecting injection molding efficiency and product quality. The sealing ring fills the gap between the connection hole and the retaining rod, reducing the flow resistance of the melt and allowing it to flow more smoothly to the area that needs to be filled.

[0034] The aforementioned sealing rings also provide a certain degree of cushioning. During the injection molding process, due to changes in the pressure and temperature of the melt, various components of the mold may be subjected to impacts and vibrations. The sealing rings can absorb these impacts and vibrations to a certain extent, reducing damage and wear to the mold and extending its service life.

[0035] Compared with the prior art, the present invention has the following advantages and beneficial effects: The first cavity on the mold cover and the second cavity on the mold base are connected when the mold cover and the mold base are connected. This design allows the plastic melt to flow smoothly from the first cavity into the second cavity or from the second cavity into the first cavity, achieving continuity and uniformity in injection molding, thereby improving the integrity of the insert injection molding.

[0036] The connecting holes on the mold base, through the cooperation of the elastic element and the fixing rod, provide stable support for the guide element, thereby providing support and positioning for the insert. The guide element directs the molten plastic to the lower end face of the insert, and injecting the molten plastic from the lower end face solves the problem that when the molten plastic is injected from the upper end face of the insert, it cannot cover the lower end face. This method ensures that the molten plastic can uniformly and fully cover the insert surface, enhancing the encapsulation effect of the injection molding. As the second guide portion moves away from the first guide portion, its size gradually increases, which helps reduce the resistance of the plastic melt during flow, allowing the melt to more smoothly cover the insert surface. Simultaneously, the second guide portion abuts against the insert, ensuring the stability of the insert during injection molding and preventing positional shifts from affecting the injection molding effect.

[0037] The elastic element inside the aforementioned connecting hole abuts against the bottom end of the fixing rod, which not only plays a buffering role during the injection molding process, reducing the direct contact pressure between the insert and the mold, but also reduces or avoids indentations on the surface of the insert. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings: Figure 1 It is a plan sectional view of an injection mold; Figure 2 It is a sectional view of a mold base; Figure 3 It is a sectional view of a mold cover; Figure 4 It is a structural schematic diagram after a flow guide member and a fixing rod are connected; Figure 5 It is a structural schematic diagram of an insert;

[0039] The reference numerals in the drawings and the corresponding names of the components: 10. Mold cover; 11. First cavity; 12. Sealing ring; 20. Mold base; 21. Second cavity; 22. Connecting hole; 30. Flow guide member; 31. First flow guide portion; 32. Second flow guide portion; 33. Fixing rod; 34. Elastic member; 35. Flow guide hole; 36. Flow guide column; 37. Flow guide groove; 38. Protrusion; 39. Flow guide plate; 40. Ejector member. Specific embodiments

[0040] To make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the embodiments and the drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not used as a limitation to the present invention.

[0041] The following embodiments are mainly directed to inserts that need to be fully enclosed. The insert is formed by enclosing three plate members to form a "C" - shaped structure. Among them, a central hole is provided on the plate member used to connect the two plate members, as Figure 5 shown; because after injection molding, the plastic melt solidified at the central hole of the insert needs to be processed later by processing equipment to obtain the final product.

[0042] Embodiment 1: Combining Figures 2 to 4 , Embodiment 1 of the present invention provides an injection mold, including a mold base 20 and a mold cover 10. A first cavity 11 is provided on the mold cover 10, a second cavity 21 is provided on the mold base 20, the mold cover 10 is arranged on the top of the mold base 20, a fitting groove is provided on the top of the mold base 20, and a fitting protrusion is provided on the bottom of the mold cover 10. After the fitting protrusion is inserted into the fitting groove, the connection is achieved; when the mold cover 10 and the mold base are connected, the first cavity 11 and the second cavity 21 are communicated; The aforementioned mold base 20 is also provided with a connecting hole 22, and the aforementioned second cavity 21 is connected to the connecting hole 22; A flow guide 30 is provided inside the second cavity 21, and the flow guide 30 includes a first flow guide 31 and a second flow guide 32 that are connected. The first guide section 31 is used to pass through the center hole of the insert. The center of the mold cover 10 is provided with a through hole, and a sealing ring 12 is provided in the through hole. The sealing ring 12 has extensibility. The first guide section 31 passes through the mold cover 10 and is connected to the injection tube. The plastic melt is injected into the first guide section 31 through the injection tube, and then flows into the second guide section 32 through the first guide section 31, and sequentially fills the second cavity 21 and the first cavity 11. When the second guide portion 32 moves away from the first guide portion 31, the size of the second guide portion 32 gradually increases, forming a trumpet-shaped structure that passes through the insert of the first guide portion 31. As the width of the second guide portion 32 increases, it eventually abuts against the second guide portion 32. The second guide section 32 is provided with a fixing rod 33, which is inserted into the connecting hole 22. An elastic element 34 is provided in the connecting hole 22. The elastic element 34 can be a spring or a sheet. The elastic element 34 abuts against the bottom end of the fixing rod 33.

[0043] The first cavity 11 on the mold cover 10 and the second cavity 21 on the mold base 20 are connected when the mold cover 10 and the mold base 20 are connected. This design allows the plastic melt to flow smoothly from the first cavity 11 into the second cavity 21 or from the second cavity 21 into the first cavity 11, realizing the continuity and uniformity of injection molding, thereby improving the coverage integrity of insert injection molding.

[0044] The connecting hole 22 on the mold base 20, through the cooperation of the elastic element 34 and the fixing rod 33, provides stable support for the guide element 30, thereby providing support and positioning for the insert. The guide element 30 guides the molten plastic to the lower end face of the insert, and injecting the molten plastic from the lower end face solves the problem that when the molten plastic is injected from the upper end face of the insert, it cannot cover the lower end face. This method ensures that the molten plastic can uniformly and fully cover the surface of the insert, enhancing the encapsulation effect of the injection molding. As the second guide portion 32 moves away from the first guide portion 31, its size gradually increases, which helps to reduce the resistance of the plastic melt during the flow process, allowing the melt to cover the insert surface more smoothly. At the same time, the second guide portion 32 is used to abut against the insert, which can ensure the stability of the insert during the injection molding process and avoid affecting the injection molding effect due to positional movement.

[0045] The elastic element 34 inside the connecting hole 22 abuts against the bottom end of the fixing rod 33, which can not only play a buffering role during the injection molding process, but also reduce the direct contact pressure between the insert and the mold, thereby reducing or avoiding indentations on the surface of the insert.

[0046] In a specific embodiment, the injection mold is further provided with an ejector 40. The ejector 40 can be a retractable device such as a hydraulic cylinder. The ejector 40 is located at the bottom of the mold base 20 and passes through the mold base 20 to connect to the bottom of the guide member 30. The ejector 40 is used to apply a pushing or pulling force to the guide member 30, so that the guide member 30 moves upward or downward.

[0047] The main function of the ejector 40 is to apply a thrust to the guide 30 after injection molding, so that it moves upward, thereby facilitating the demolding of the insert and the injection molded part.

[0048] The ejector 40 ensures smooth separation of the insert and the injection molded part during the demolding process. After injection molding, the ejector 40 applies a pushing force, causing the guide 30 and the insert to move upwards together, thus easily removing the insert and the injection molded part from the mold. This greatly simplifies the demolding process and improves production efficiency.

[0049] The connection design between the ejector 40 and the guide 30 helps maintain the stability and compactness of the mold structure. The ejector 40 passes through the mold base 20 and connects to the guide 30. This connection method not only ensures the effective transmission of thrust, but also makes the overall structure of the mold more compact and stable, improving the service life and reliability of the mold.

[0050] Example 2: Based on Example 1, the first guide section 31 includes a guide column 36, and a plurality of guide holes 35 are arranged on the guide column 36. The length direction of the guide holes 35 is the same as the axial direction of the guide column 36.

[0051] The aforementioned guide column 36, as the main part of the first guide section 31, ensures stable guidance of the molten plastic as it flows into the second cavity 21, avoiding turbulence during the melt flow process. This design allows the melt to more evenly cover the surface of the insert, thereby improving the integrity of the injection molding coating.

[0052] The aforementioned flow guide holes 35 provide flow channels for the melt. The flow guide holes 35 and the flow guide pillars 36 are axially aligned, meaning that the melt can flow smoothly along these channels, further enhancing the melt's coverage effect on the insert surface. This is suitable for complex insert structures requiring high coating integrity and can effectively reduce injection molding dead zones and material shortages.

[0053] In summary, the first flow guide section 31 includes the design of the flow guide column 36 and a plurality of flow guide holes 35 arranged on the flow guide column 36. By optimizing the flow path and flow state of the melt, it further improves the encapsulation integrity of the insert injection molding and reduces the indentation on the contact surface.

[0054] Furthermore, by rationally designing the number, size, and distribution of the flow guide holes 35, precise control of the melt flow rate and pressure can be achieved; this helps to reduce the impact and pressure of the melt on the insert surface during the flow process, thereby reducing or avoiding the formation of indentations.

[0055] Example 3: Based on Example 2, the second flow guide 32 includes a flow guide plate 39, the middle part of the flow guide plate 39 is raised, and the raised part of the flow guide plate 39 (i.e. the raised end) is connected to the first flow guide 31. Starting from the raised position of the aforementioned guide plate 39, guide grooves 37 are arranged on the aforementioned guide plate 39; The aforementioned flow guide grooves 37 and flow guide holes 35 are correspondingly provided, and each flow guide hole 35 is connected to a flow guide groove 37, forming a one-to-one correspondence.

[0056] The raised design in the middle of the aforementioned guide plate 39 makes it smoother after connecting with the first guide section 31. Starting from the raised end, the guide grooves 37 arranged on the guide plate 39 are corresponding to the guide holes 35 on the first guide section 31. This design allows the melt to flow smoothly through the guide grooves 37 when it flows from the first guide section 31 into the second guide section 32, further enhancing the fluidity and uniformity of the melt on the insert surface.

[0057] Due to the corresponding arrangement of the aforementioned flow channels 37 and flow holes 35, the melt can form a continuous flow channel during the flow process, avoiding the splitting and turbulence of the melt during the flow process; this design helps to reduce the impact and pressure of the melt on the insert surface, thereby reducing or avoiding the generation of indentations.

[0058] Precise control of the melt flow path can be achieved by rationally designing the shape, size, and distribution of the flow channels 37. This helps reduce the resistance of the melt during the flow process and allows the melt to better fill the complex structure of the insert, thereby improving the encapsulation integrity of the injection molding.

[0059] Example 4: Based on Example 3, the width of the guide groove 37 gradually increases along the direction away from the first guide section 31 in the second guide section 32.

[0060] The gradual increase in the width of the aforementioned guide channel 37 means that the melt has more space during the flow process.

[0061] Firstly, as the melt flows from the first guide section 31 to the second guide section 32, the resistance to the melt during the flow process is reduced. As the width of the guide channel 37 increases, the obstacles encountered by the melt during the flow process will gradually decrease, allowing the melt to cover the insert surface more smoothly, ensuring the fluidity and coverage of the melt.

[0062] Secondly, it helps the melt to better fill the complex structure of the insert. When the melt flows through the gradually widening guide channel 37, it can more smoothly enter every corner and small space of the insert, reducing injection dead zones and material shortages, thereby improving the integrity of the injection molding coating.

[0063] Thirdly, by rationally designing the varying gradient of the width of the guide channel 37, precise control of the melt flow rate and pressure can be achieved; this control helps to reduce the impact and pressure of the melt on the insert surface during the flow process, thereby reducing or avoiding the generation of indentations.

[0064] Example 5: Based on Example 4, a protrusion 38 is formed between adjacent guide grooves 37, and the protrusion 38 is used to abut the insert.

[0065] The protrusions 38 ensure a tighter contact between the second guide portion 32 and the insert. During injection molding, these protrusions 38 directly abut against the surface of the insert, ensuring its stable position in the mold and preventing movement or deformation under melt pressure. This helps ensure that the melt evenly covers all parts of the insert during injection molding, improving the integrity of the coating.

[0066] The aforementioned protrusion 38 also reduces the direct contact area between the insert and the mold, thereby lowering the risk of indentation caused by melt pressure. During injection molding, the melt exerts pressure on the insert and mold as it flows. If the contact area between the insert and the mold is too large, indentation is likely to occur. The presence of protrusion 38 disperses this pressure, reducing direct pressure on the insert surface and effectively minimizing indentation formation.

[0067] In summary, by providing protrusions 38 between adjacent guide channels 37, the integrity of insert injection molding can be further improved and indentations on the contact surface can be reduced.

[0068] Example 6: Based on Example 4 or Example 5, the transverse cross-section of the above-mentioned guide groove 37 is arc-shaped.

[0069] The arc-shaped guide channel 37 can better guide the flow of the melt. This allows the melt to form a smoother and more continuous flow line during the injection molding process, reducing potential defects or flaws and improving the overall aesthetics of the product. Compared with straight or planar shapes, the arc-shaped cross-section can better adapt to the flow characteristics of the melt, reduce flow resistance, and allow the melt to flow more smoothly through the guide channel 37 and cover the surface of the insert.

[0070] The aforementioned arc-shaped guide groove 37 also serves to disperse melt pressure. During injection molding, the melt exerts a certain pressure on the insert and mold. The arc-shaped design can better disperse this pressure, avoiding excessive pressure concentration in specific areas, thereby reducing the formation of indentations on the contact surface.

[0071] Example 7: Based on any of the above embodiments, a sealing ring is fitted onto the fixing rod 33, and the sealing ring is connected to the connecting hole 22; the sealing ring is used to seal the connecting hole 22.

[0072] The aforementioned sealing ring is malleable, ensuring the smooth movement of the guide component 30. It effectively prevents molten plastic from entering the connecting hole 22 during injection molding. During injection molding, the molten plastic flows under high temperature and pressure. If the connecting hole 22 is not effectively sealed, the molten plastic may enter from the second cavity 21, affecting the movement of the guide component 30. The sealing ring ensures the sealing of the connecting hole 22, preventing molten plastic leakage and guaranteeing the smooth progress of the injection molding process.

[0073] The aforementioned sealing ring also reduces the flow resistance of the melt at the connecting hole 22. If there is a gap in the connecting hole 22, the melt will experience additional resistance during flow, affecting injection molding efficiency and product quality. The sealing ring fills the gap between the connecting hole 22 and the fixing rod 33, reducing the flow resistance of the melt and allowing it to flow more smoothly to the area that needs to be filled.

[0074] The aforementioned sealing rings also provide a certain degree of cushioning. During the injection molding process, due to changes in the pressure and temperature of the melt, various components of the mold may be subjected to impacts and vibrations. The sealing rings can absorb these impacts and vibrations to a certain extent, reducing damage and wear to the mold and extending its service life.

[0075] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An injection mold, characterized in that, It includes a mold base (20) and a mold cover (10). The mold cover (10) is provided with a first cavity (11), and the mold base (20) is provided with a second cavity (21). The mold cover (10) is located on the top of the mold base (20). When the mold cover (10) and the mold base (20) are connected, the first cavity (11) and the second cavity (21) are connected. The mold base (20) is also provided with a connecting hole (22), and the second cavity (21) and the connecting hole (22) are connected; The second cavity (21) is provided with a flow guide (30), which includes a first flow guide (31) and a second flow guide (32) that are connected. The first guide section (31) is used to pass through the center hole of the insert and through the mold cap (10) to connect to the injection tube; As the second guide portion (32) moves away from the first guide portion (31), the size of the second guide portion (32) gradually increases, and the second guide portion (32) is used to abut against the insert; The second guide section (32) is provided with a fixing rod (33), which is inserted into the connecting hole (22). An elastic element (34) is provided in the connecting hole (22), and the elastic element (34) abuts against the bottom end of the fixing rod (33). The first guide section (31) includes a guide column (36), and a plurality of guide holes (35) are arranged on the guide column (36). The length direction of the guide holes (35) is the same as the axial direction of the guide column (36). The second flow guide (32) includes a flow guide plate (39), the middle part of which is raised, and the raised part of the flow guide plate (39) is connected to the first flow guide (31); Starting from the raised position of the guide plate (39), guide grooves (37) are arranged on the guide plate (39); The flow guide groove (37) and the flow guide hole (35) are respectively provided; Along the direction away from the first guide section (31) from the second guide section (32), the width of the guide groove (37) gradually increases; A protrusion (38) is formed between adjacent guide grooves (37), the protrusion (38) being used to abut the insert; The transverse cross-section of the guide channel (37) is arc-shaped.

2. The injection mold according to claim 1, characterized in that, The injection mold is also provided with an ejector (40), which passes through the mold base (20) and connects to the guide (30); the ejector (40) is used to apply a thrust to the guide (30) so that the guide (30) moves up and down.

3. The injection mold according to claim 1, characterized in that, A sealing ring is fitted onto the fixing rod (33), and the sealing ring is connected to the connecting hole (22); the sealing ring is used to seal the connecting hole (22).

Images