A mould structure for producing a tee fitting

Abstract

The utility model discloses a mould structure for producing tee pipe fitting, including upper die body, lower die body, first mould core and second mould core, be provided with the forming mould cavity between upper die body and lower die body, and the forming mould cavity is by intercommunication first forming cavity and second forming cavity composition, first mould core sets up in second forming cavity, second mould core is by interadhesion long mould core and short mould core composition, and long mould core and short mould core set up in first forming cavity, and first mould core is close to second mould core one end and long mould core adhesion, is provided with cooling runner in long mould core, and cooling runner extends to the meeting place of first forming cavity and second forming cavity. Compared with prior art, split second mould core into interadhesion long mould core and short mould core, and set up the cooling runner of extending to the meeting place of first forming cavity and second forming cavity in long mould core, make the area that originally because three mould cores intersect and difficultly arrange cooling structure, can realize accurate, high -efficient cooling through the cooling runner in long mould core.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold structure for producing tee fittings. Background Technology

[0002] Currently, most mainstream tee fitting forming molds in the industry adopt a combined mold core structure, typically consisting of an upper mold body, a lower mold body, a first mold core, a second mold core, and a third mold core. The upper and lower mold bodies form a closed cavity, while the three mold cores correspond to the three interface sections of the tee fitting. Specifically, the first and second mold cores are positioned horizontally and fit together, forming the two horizontal interface forming sections of the tee fitting; the third mold core is located in front of the first and second mold cores, with its rear end tightly fitted to both, corresponding to the vertical interface forming section of the tee fitting. This structural design achieves the forming of complex cavities through the combination of mold cores, simplifying the mold processing difficulty to a certain extent.

[0003] However, this structure faces significant technical bottlenecks in practical applications. The intersection of the three mold cores forms a complex three-dimensional structure, with the mating surfaces of the first, second, and third mold cores intersecting in the intersecting area, resulting in extremely limited and irregular internal space. This characteristic makes it difficult to arrange traditional straight or annular cooling channels here. Forcing the installation of channels would not only compromise the structural strength of the mold cores but also hinder the flow of the cooling medium due to excessive bends and long paths, thus preventing effective cooling.

[0004] Defects in the cooling system directly affect the molding quality of tee fittings. During injection molding, the molten plastic needs to cool and solidify rapidly after filling the cavity. The intersection of the tee fittings, as the core area where the melt converges, has concentrated heat and a long heat dissipation path. Under the existing mold structure, due to the lack of effective cooling channels, the heat in this area is difficult to dissipate quickly, resulting in a cooling rate that lags far behind other areas. This phenomenon easily leads to a series of problems: First, the molten plastic at the intersection cannot solidify quickly due to untimely cooling, and is prone to deformation due to its own weight or internal stress after the injection pressure is removed, resulting in dimensional deviations; Second, uneven cooling leads to inconsistent shrinkage rates between this area and other areas, causing internal stress concentration, which in turn leads to defects such as cracking and warping; Third, excessively long cooling times prolong the molding cycle, reduce production efficiency, and increase production costs. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a mold structure for producing tee fittings.

[0006] A mold structure designed for producing tee fittings includes an upper mold body, a lower mold body, a first mold core, and a second mold core.

[0007] A molding cavity is provided between the upper mold body and the lower mold body, and the molding cavity is composed of a first molding cavity and a second molding cavity that are interconnected with each other.

[0008] The first mold core is disposed within the second molding cavity;

[0009] The second mold core is composed of a long mold core and a short mold core that fit together. The long mold core and the short mold core are disposed in the first molding cavity, and the end of the first mold core near the second mold core is fitted with the long mold core.

[0010] The long mold core is provided with a cooling channel, which extends to the intersection of the first molding cavity and the second molding cavity.

[0011] Preferably, the long mold core and the short mold core are arranged side by side;

[0012] The right end of the long mold core extends into the first molding cavity to the right of the second molding cavity;

[0013] The short mold core is located in the first molding cavity to the right of the second molding cavity.

[0014] Preferably, the right end of the long mold core is provided with a first pair of inserts, and the left end of the short mold core is provided with a second pair of inserts, wherein the first pair of inserts and the second pair of inserts are interlocked.

[0015] Preferably, the upper mold body is provided with an injection flow channel that communicates with the molding cavity.

[0016] Preferably, the lower mold body is movably provided with a first sliding seat, and the long mold core is fixedly disposed on the first sliding seat.

[0017] Preferably, the lower mold body is movably provided with a second sliding seat, and the short mold core is fixedly disposed on the second sliding seat.

[0018] Preferably, the lower mold body is movably provided with a third sliding seat, and the first mold core is fixedly disposed on the third sliding seat.

[0019] Compared with existing technologies, this invention effectively solves the cooling problem at the intersection of tee fittings. The second mold core is divided into two interlocking long and short mold cores. A cooling channel extending to the intersection of the first and second forming cavities is provided within the long mold core. This allows for precise and efficient cooling of areas where cooling structures were previously difficult to arrange due to the intersection of the three mold cores, through the cooling channel within the long mold core. The cooling medium can directly act on the cavity area corresponding to the intersection of the tee fitting, significantly improving the cooling speed and uniformity at this location. This avoids problems such as deformation and cracking caused by untimely cooling, and greatly improves the forming quality of the tee fitting. Attached Figure Description

[0020] Figure 1 This is one of the cross-sectional structural schematic diagrams of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 3 This is an exploded structural diagram of the present invention;

[0023] Figure 4 This is the second cross-sectional structural schematic diagram of this utility model. Detailed Implementation

[0024] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0027] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0028] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0029] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0030] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0031] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0032] See Figures 1-4A mold structure for producing tee pipe fittings includes an upper mold body 10, a lower mold body 20, a first mold core 40, and a second mold core 50. A molding cavity 310 is provided between the upper mold body 10 and the lower mold body 20. The molding cavity 310 is composed of a first molding cavity 311 and a second molding cavity 312 that are interconnected. The upper mold body 10 is provided with an injection runner 320 that is interconnected with the molding cavity 310. The first mold core 40 is disposed in the second molding cavity 312. The second mold core 50 is composed of a long mold core 510 and a short mold core 520 that are fitted together. The long mold core 510 and the short mold core 520 are disposed in the first molding cavity 311. The end of the first mold core 40 near the second mold core 50 is fitted with the long mold core 510. A cooling runner 511 is provided in the long mold core 510, and the cooling runner 511 extends to the intersection of the first molding cavity 311 and the second molding cavity 312.

[0033] During operation, the mold structure used for producing tee fittings first achieves a closed molding space through the closing action of the upper mold body 10 and the lower mold body 20. The first molding cavity 311 and the second molding cavity 312 of the molding cavity 310 are interconnected, together forming the cavity outline of the tee fitting. At this time, the first mold core 40 is precisely embedded in the second molding cavity 312, while the long mold core 510 and the short mold core 520 of the second mold core 50 are tightly fitted within the first molding cavity 311. Furthermore, the end of the first mold core 40 closest to the second mold core 50 is tightly fitted with the long mold core 510, ensuring the dimensional accuracy of each part of the cavity.

[0034] During the injection molding stage, the molten plastic melt is injected into the molding cavity 310 through the injection runner 320 provided on the upper mold body 10. Under pressure, the melt fills the first molding cavity 311 and the second molding cavity 312 along the runner until it completely fills the entire cavity. During this process, the melt gradually forms the basic shape of a three-way pipe fitting, with its three interface parts corresponding to the first molding cavity 311, the second molding cavity 312, and the junction of the two, respectively.

[0035] Once the melt is filled, the cooling system begins operation. The cooling medium (such as cooling water) circulates through the cooling channels 511 within the long mold core 510. Since the cooling channels 511 extend to the intersection of the first molding cavity 311 and the second molding cavity 312, they can directly and efficiently cool the melt at the intersection of the tee fittings. Cooling channels are also provided in both the first mold core 40 and the short mold core 520 to allow cooling water to circulate. During its flow, the cooling medium continuously absorbs heat from the melt and carries it out of the mold, allowing the melt inside the cavity to gradually cool and solidify from the intersection towards other areas.

[0036] As the cooling process continues, the plastic melt gradually loses its fluidity and solidifies, eventually forming a tee fitting that conforms to the shape of the molding cavity 310. After the fitting is completely solidified, the upper mold body 10 separates from the lower mold body 20, completing the mold opening action. Then, the molded tee fitting is removed from the cavity through the corresponding ejection mechanism, thus completing a full molding cycle.

[0037] See Figure 4 The long mold core 510 and the short mold core 520 are arranged side-by-side. The right end of the long mold core 510 extends into the first molding cavity 311 to the right of the second molding cavity 312. The short mold core 520 is located within the first molding cavity 311 to the right of the second molding cavity 312. For cooling, the extension of the long mold core into the first molding cavity to the right of the second molding cavity allows its internal cooling channels to be closer to this area and its junction with the second molding cavity. This arrangement allows the cooling medium to absorb heat from these critical areas more efficiently as it flows through the channels. Combined with the fit between the long mold core and the first mold core, this enhances heat transfer efficiency and creates favorable conditions for rapid cooling and solidification of the melt in critical areas.

[0038] See Figure 4 The long mold core 510 has a first pair of inserts 512 at its right end, and the short mold core 520 has a second pair of inserts 521 at its left end. The first pair of inserts 512 and the second pair of inserts 521 are interlocked. This interlocking method provides a precise positioning reference for the assembly of the long and short mold cores. During mold assembly, the first pair of inserts and the second pair of inserts can quickly find their mating positions, effectively avoiding misalignment or displacement of the long and short mold cores when they are arranged left and right. This ensures that the two form a stable and design-compliant combination structure within the first molding cavity on the right side of the second molding cavity, laying a solid foundation for the precise molding of the subsequent cavity.

[0039] The first pair of inserts 512 are grooves, and the second insert 521 is a protrusion. The two are inserted and engaged in the long mold core 510 and the short mold core 520 to achieve positioning and insertion.

[0040] Furthermore, the lower mold body 20 is movably provided with a first sliding seat 610, and the long mold core 510 is fixedly disposed on the first sliding seat 610. The sliding arrangement facilitates the connection of linear actuators such as cylinders to achieve rapid demolding or mold closing.

[0041] Furthermore, the lower mold body 20 is movably provided with a second sliding seat 620, and the short mold core 520 is fixedly disposed on the second sliding seat 620. The sliding arrangement facilitates the connection of linear actuators such as cylinders to achieve rapid demolding or mold closing.

[0042] Furthermore, the lower mold body 20 is movably provided with a third sliding seat 630, and the first mold core 40 is fixedly disposed on the third sliding seat 630. The sliding arrangement facilitates the connection of linear actuators such as cylinders to achieve rapid demolding or mold closing.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mold structure for producing tee pipe fittings, characterized in that: It includes an upper mold body (10), a lower mold body (20), a first mold core (40), and a second mold core (50); A molding cavity (310) is provided between the upper mold body (10) and the lower mold body (20), and the molding cavity (310) is composed of a first molding cavity (311) and a second molding cavity (312) that are interconnected. The first mold core (40) is disposed in the second molding cavity (312); The second mold core (50) is composed of a long mold core (510) and a short mold core (520) that are attached to each other. The long mold core (510) and the short mold core (520) are disposed in the first molding cavity (311). The end of the first mold core (40) near the second mold core (50) is attached to the long mold core (510). The long mold core (510) is provided with a cooling channel (511), which extends to the intersection of the first molding cavity (311) and the second molding cavity (312).

2. The mold structure for producing tee fittings according to claim 1, characterized in that: The long mold core (510) and the short mold core (520) are arranged side by side; The right end of the long mold core (510) extends into the first molding cavity (311) to the right of the second molding cavity (312); The short mold core (520) is disposed in the first molding cavity (311) to the right of the second molding cavity (312).

3. The mold structure for producing tee fittings according to claim 1, characterized in that: The right end of the long mold core (510) is provided with a first pair of inserts (512), and the left end of the short mold core (520) is provided with a second pair of inserts (521). The first pair of inserts (512) and the second pair of inserts (521) are inserted into each other.

4. The mold structure for producing tee fittings according to claim 1, characterized in that: The upper mold body (10) is provided with an injection flow channel (320) that communicates with the molding cavity (310).

5. The mold structure for producing tee fittings according to claim 1, characterized in that: The lower mold body (20) is movably provided with a first sliding seat (610), and the long mold core (510) is fixedly provided on the first sliding seat (610).

6. The mold structure for producing tee fittings according to claim 1, characterized in that: The lower mold body (20) is movably provided with a second sliding seat (620), and the short mold core (520) is fixedly provided on the second sliding seat (620).

7. The mold structure for producing tee fittings according to claim 1, characterized in that: The lower mold body (20) is movably provided with a third sliding seat (630), and the first mold core (40) is fixedly provided on the third sliding seat (630).

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