A four-outlet tube cavity mold

Abstract

The utility model relates to a four-outlet tube cavity mold, including an upper mold and a lower mold, the top bulge of the lower mold forms an injection molding table, the bottom of the upper mold is provided with an avoidance groove for covering the injection molding table, and the intersection of the injection molding table and the avoidance groove is provided with an injection molding groove for injection molding a four-way tube, and the two injection molding grooves are spliced ​​to form a complete injection molding cavity. The utility model relates to the technical field of four-way tube production. The four-outlet tube cavity mold can limit the space in the injection molding cavity formed when the upper mold and the lower mold are molded together through the setting piece, so that the fluid entering the injection molding cavity is squeezed by the setting piece and filled in the gap between the setting piece and the injection molding cavity, so that the fluid is wrapped on the outside of the setting piece, and then the setting piece is pulled out to complete the injection molding of the four-way tube, so that the molding and demolding difficulty of the four-way tube is greatly reduced, and the production efficiency of the four-way tube is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of four-way pipe production, in particular to a four-outlet tube cavity mold. Background Art

[0002] Pipe fittings are a general term for parts in pipeline systems that play the role of connection, control, direction change, diversion, sealing, support, etc. For example, the cross pipe is a connector for daily life pipelines. It is widely used in the building materials industry. Especially in today's society that advocates energy conservation and technological innovation, plastic pipe fittings will once again set off a pipe fittings boom.

[0003] In the prior art, when a pipe is formed by a mold, an intermediate shaft is needed to limit the space in the mold so that the injected liquid is blocked by the intermediate shaft and fills the remaining space, thereby forming a hollow tube hole in the middle of the blank after molding. The four-way pipe has multiple interlaced tube holes, which makes it difficult to set the intermediate shaft, thereby affecting the injection molding of the four-way pipe. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a four-outlet tube cavity mold so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A four-outlet tube cavity mold comprises an upper mold and a lower mold, wherein the top bulge of the lower mold forms an injection molding platform, the bottom of the upper mold is provided with an avoidance groove for covering the injection molding platform, the intersection of the injection molding platform and the avoidance groove is provided with an injection molding groove for injection molding a four-way tube, the two injection molding grooves are spliced ​​to form a complete injection molding cavity, the top of the upper mold is provided with an injection molding port connected to the injection molding groove, and the outer side wall of the upper mold is provided with a shaping piece for inserting into the injection molding groove.

[0007] Furthermore, the shaping piece is composed of a long axis and two short axes, the inner side wall of the avoidance groove at one of the branches of the injection molding groove is provided with a positioning slot, and the inner side walls of the avoidance groove at the other three branches of the injection molding groove are all provided with positioning holes that penetrate the upper mold;

[0008] The long axis is inserted into the positioning insertion hole opposite to the positioning slot, and one end of the long axis close to the injection slot passes through the injection slot and is inserted into the positioning slot;

[0009] The two short shafts are respectively arranged on both sides of the long shaft, and one end of the two short shafts close to the injection groove passes through the corresponding positioning plug hole and contacts with the long shaft.

[0010] Furthermore, the short axis is symmetrically provided with two inclined surfaces at the end near the long axis, and the two inclined surfaces are rounded at the edges and corners near one side of the long axis so that the middle surface of the two inclined surfaces forms a circular surface for smooth transition, and the outer side wall of the long axis is provided with a positioning groove that fits with the inclined surface.

[0011] Furthermore, the upper mold is provided with a threaded hole at the opening of the positioning socket, and is threadedly connected with an adjusting knob, and the ends of the long axis and the short axis away from the injection groove are rotatably connected to the corresponding adjusting knobs respectively.

[0012] Furthermore, the adjusting knob is composed of a threaded sleeve, a rotor and a torque assembly. The threaded sleeve is threadedly connected in the threaded groove. An adjusting groove is provided on the side of the threaded sleeve away from the injection groove. A rotor is rotatably connected to the opening of the adjusting groove. An over-tightening-preventing torque assembly is provided between the rotor and the adjusting groove.

[0013] Furthermore, the torsion assembly includes a ball, a slide and a spring. The slide is slidably arranged in the adjustment groove, a spring is arranged on the side of the slide away from the rotor, a plurality of balls are arranged in a circular array on the side of the slide close to the rotor, and a ball groove for placing the balls is opened on the side of the rotor close to the slide.

[0014] Furthermore, pin grooves are provided at four corners of a side of the upper die close to the lower die, and positioning pins inserted into the pin grooves are fixedly connected to the four corners of the lower die.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] 1. The four-outlet tube cavity mold can limit the space in the injection cavity formed when the upper mold and the lower mold are molded together by setting the shaping piece, so that the fluid entering the injection cavity is squeezed by the shaping piece and filled in the gap between the shaping piece and the injection cavity, so that the fluid is wrapped outside the shaping piece, and then the shaping piece is pulled out to complete the injection molding of the four-way tube, so that the molding and demoulding difficulty of the four-way tube is greatly reduced, and the production efficiency of the four-way tube is improved;

[0017] 2. This four-outlet tube cavity mold can make the installation of the forming part more stable and the molding effect of the four-way pipe better by setting the adjusting knob, and the torsion component in the adjusting knob can also provide protection for the long axis in the forming part to prevent it from bending due to excessive force, so that the wall thickness of the four-way pipe after molding can be kept the same, which can be used to improve the quality of the four-way pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The utility model is a structural schematic diagram of a four-outlet tube cavity mold.

[0020] Figure 2 The utility model is a schematic structural diagram of an upper mold in a four-outlet tube cavity mold.

[0021] Figure 3 The utility model is a schematic structural diagram of a four-outlet tube cavity mold when a shaped part is inserted into an upper mold.

[0022] Figure 4 The utility model is a schematic structural diagram of a middle and lower mold of a four-outlet tube cavity mold.

[0023] Figure 5 The utility model is a structural schematic diagram of a shaped part in a four-outlet tube cavity mold.

[0024] Figure 6 The utility model is a schematic structural diagram of an adjusting knob in a four-outlet tube cavity mold.

[0025] Figure 7 The utility model is a structural schematic diagram of a four-outlet tube cavity mold when injecting a four-way tube.

[0026] In the figure, 1, upper mold; 2, lower mold; 3, injection molding table; 4, avoidance groove; 5, injection molding groove; 6, injection molding port; 7, molding part; 71, long axis; 72, short axis; 8, positioning slot; 9, positioning socket; 10, inclined surface; 11, round surface; 12, positioning groove; 13, threaded hole; 14, adjusting knob; 141, threaded sleeve; 142, rotor; 143, torque assembly; 1431, ball; 1432, slide; 1433, spring; 15, adjusting groove; 16, pin groove; 17, positioning pin. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1 - Figure 7The utility model discloses a four-outlet tube cavity mold, including an upper mold 1 and a lower mold 2, the top of the lower mold 2 is convexly formed with an injection molding platform 3, the bottom of the upper mold 1 is provided with an avoidance groove 4 for covering the injection molding platform 3, the intersection of the injection molding platform 3 and the avoidance groove 4 is provided with an injection molding groove 5 for injecting a four-way pipe, two injection molding grooves 5 are spliced ​​to form a complete injection molding cavity, the top of the upper mold 1 is provided with an injection molding port 6 connected with the injection molding groove 5, and the outer side wall of the upper mold 1 is provided with a shaping piece 7 for inserting into the injection molding groove 5.

[0030] In this embodiment, because the four-way pipe has multiple paths interlaced together, it is difficult to inject the four-way pipe, and the demoulding operation after molding is also difficult. Figure 3 It can be found that the upper mold 1 is equipped with a shaping piece 7, so that after the shaping piece 7 and the upper mold 1 are installed, the upper mold 1 and the lower mold 2 are spliced, so that the injection grooves 5 of the upper mold 1 and the lower mold 2 form a complete injection cavity, and the shaping piece 7 is arranged in the injection cavity, so that when the injection is performed through the injection port 6, the fluid entering the injection cavity will be squeezed by the shaping piece 7 when filling the injection cavity, resulting in the fluid being sandwiched on the outside of the shaping piece 7 (such as Figure 7 As shown in A in the figure, the blank of the four-way pipe is formed.

[0031] After the fluid is completely cooled and shaped, the mold is opened to separate the upper mold 1 from the lower mold 2. The blank is then separated from the lower mold 2 by the pulling of the shaping piece 7. The shaping piece 7 is then pulled out to separate the blank from the upper mold 1. Finally, the mold line, burrs and water outlets on the surface of the blank are cleaned to obtain an integrally formed four-way pipe.

[0032] Among them, before closing the mold, it is necessary to apply a mold release agent to the inner wall of the injection groove 5 of the upper mold 1 and the lower mold 2, and the outer wall of the shaping part 7 used for shaping also needs to be coated with a mold release agent, which can make demolding the blank easier and reduce the damage to the blank during demolding.

[0033] In a further preferred embodiment of the present invention, Figure 2 , Figure 3 and Figure 5 As shown, the shaping member 7 is composed of a long axis 71 and two short axes 72, the inner side wall of the avoidance groove 4 located at one of the branches of the injection groove 5 is provided with a positioning slot 8, and the inner side walls of the avoidance groove 4 located at the other three branches of the injection groove 5 are all provided with positioning holes 9 that penetrate the upper mold 1;

[0034] The long axis 71 is inserted into the positioning hole 9 opposite to the positioning slot 8, and one end of the long axis 71 close to the injection slot 5 passes through the injection slot 5 and is inserted into the positioning slot 8;

[0035] The two short shafts 72 are respectively arranged on both sides of the long shaft 71 , and one end of the two short shafts 72 close to the injection groove 5 passes through the corresponding positioning holes 9 and contacts with the long shaft 71 .

[0036] In this embodiment, because there are multiple interlaced paths in the four-way valve, it is difficult to form the four-way valve, and it is difficult to demould after forming. Figure 5 It can be found that the shaping piece 7 used as the intermediate shaft to shape the inner hole of the four-way pipe is divided into a detachable long shaft 71 and a short shaft 72. Figure 2 It can be found that positioning holes 9 for inserting the long axis 71 and the short axis 72 are opened on the three sides of the avoidance groove 4, and a positioning slot 8 is opened on the last side, which can be used to install the long axis 71 and the short axis of the shaping piece 7, making the installation of the shaping piece 7 and the upper mold 1 more convenient.

[0037] Final Observations Figure 3 It can be seen that after the long shaft 71 is inserted into the upper mold 1, the positioning slot 8 is used to fix the long shaft 71, and then the other two short shafts 72 are inserted into the upper mold 1, and the short shafts 72 are made to contact with the long shaft 71, so that a gap is left between the injection molding groove 5 and the molding piece 7, so that the fluid can be squeezed by the molding piece 7 after being injected into the injection molding groove 5 and wrapped around the outer wall of the molding piece 7, and after the blank is formed, the molding piece 7 is pulled out to complete the molding of the four-way pipe, so that the molding efficiency of the four-way pipe is higher, and the demolding effect after molding is better, which can effectively improve the production efficiency of the four-way pipe.

[0038] In a further preferred embodiment of the present invention, Figure 5 As shown, two inclined surfaces 10 are symmetrically provided at the end of the short axis 72 close to the long axis 71, and the two inclined surfaces 10 are rounded at the edges and corners of one side close to the long axis 71 so that the middle surface of the two inclined surfaces 10 forms a circular surface 11 for smooth transition, and the outer wall of the long axis 71 is provided with a positioning groove 12 that fits with the inclined surface 10.

[0039] In this embodiment, because the short axis 72 is in contact with the long axis 71 and both the short axis 72 and the long axis 71 need to be circular so that the tube wall of the four-way tube is evenly stressed, the short axis 72 and the long axis 71 are difficult to be perfectly spliced ​​together due to the circular curved surface when they are in contact.

[0040] So observe Figure 5It can be found that a slope 10 is symmetrically provided at the end of the short shaft 72 close to the long shaft 71, and a positioning groove 12 is provided on the outer wall of the long shaft 71 to fit the slope 10, so that the short shaft 72 can be inserted into the long shaft 71, which can effectively reduce the gap between the short shaft 72 and the long shaft 71 after installation, thereby avoiding the fluid from entering the gap to form burrs during injection molding, and effectively improving the smoothness of the inner wall of the four-way tube.

[0041] Before the short shaft 72 contacts the long shaft 71, it is difficult to ensure that the inclined surface 10 of the short shaft 72 is exactly parallel to the positioning groove 12, and the corners of the end of the short shaft 72 will contact the inner wall of the positioning groove 12. Then, the short shaft 72 will scratch the inner wall of the positioning groove 12 under the pressure of the press installation, resulting in the corners of the short shaft 72 being worn due to the scratching after the inclined surface 10 fits with the inner wall of the positioning groove 12, which increases the gap between the short shaft 72 and the long shaft 71, resulting in the increase of the burr of the inner wall of the blank after cooling and forming. Figure 5 It can be found that the corners of the inclined surface 10 are rounded to form a smooth round surface 11 between the two inclined surfaces 10. When the short shaft 72 contacts the positioning groove 12 of the long shaft 71, the round surface 11 can be used to reduce the pressure during contact, thereby reducing the loss caused when the short shaft 72 is inserted into the positioning groove 12, and can effectively avoid the increase of the gap between the short shaft 72 and the long shaft 71, which can be used to ensure the quality of the four-way pipe during production.

[0042] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the upper mold 1 is provided with a threaded hole 13 at the opening of the positioning socket 9 and is threadedly connected with an adjusting knob 14 , and the ends of the long axis 71 and the short axis 72 away from the injection groove 5 are rotatably connected to the corresponding adjusting knobs 14 .

[0043] In this embodiment, because the long axis 71 and the short axis 72 are separate parts, the long axis 71 and the short axis 72 need to be stably connected during injection molding to avoid a gap that causes the blank to be unable to be demolded. Figure 2 It can be found that a threaded hole 13 is provided at the opening of the positioning socket 9, and an adjusting knob 14 is connected to the inner thread of the threaded hole 13, and the long axis 71 and the short axis 72 are connected to the corresponding adjusting knob 14. The connection between the adjusting knob 14 and the threaded hole 13 can be used to position the long axis 71 and the short axis 72, so that the long axis 71 and the short axis 72 can remain stable during the injection molding process to ensure the quality of the four-way pipe blank after molding.

[0044] In a further preferred embodiment of the present invention, Figure 6As shown, the adjusting knob 14 is composed of a threaded sleeve 141, a rotor 142 and a torque assembly 143. The threaded sleeve 141 is threadedly connected in the thread groove. An adjusting groove 15 is provided on the side of the threaded sleeve 141 away from the injection groove 5. The rotor 142 is rotatably connected to the opening of the adjusting groove 15. An over-tightening-preventing torque assembly 143 is provided between the rotor 142 and the adjusting groove 15.

[0045] In this embodiment, the threaded sleeve 141 can be used to connect with the threaded hole 13, and because the outer wall of the long axis 71 is symmetrically provided with the positioning groove 12, the force of the long axis 71 at the positioning groove 12 becomes poor, and it is easy to be bent by the short axis 72, so a rotor 142 is rotatably provided in the threaded sleeve 141, and the rotor 142 and the threaded sleeve 141 are connected by a torque assembly 143, and then observe Figure 6 It can be found that the outer side of the rotor 142 is provided with a hexagonal slot for inserting a wrench. When the long shaft 71 is installed by the hexagonal wrench, under the action of the torque assembly 143, the rotor 142 will rotate with the threaded sleeve 141. When the long shaft 71 is fully inserted into the positioning slot 8, as the rotor 142 rotates, the pressure on the torque assembly 143 will increase until the torque assembly 143 is separated from the rotor 142, so that the rotor 142 rotates idly, which can effectively prevent the long shaft 71 from being bent due to excessive pressure. ; When the long shaft 71 is installed, the short shaft is inserted into the positioning hole 9, and then the rotor 142 is rotated to make the threaded sleeve 141 bring the short shaft 72 close to the long shaft 71. Then, after the short shaft 72 is fitted with the long shaft 71, the short shaft 72 will be blocked by the long shaft 71 and cannot move forward. Therefore, when the rotor 142 continues to rotate, the corresponding torque assembly 143 will be separated from the rotor 142, which can effectively prevent the long shaft 71 from being bent due to excessive force, so as to ensure the consistent wall thickness of the four-way pipe, and effectively improve the quality of the four-way pipe.

[0046] In a further preferred embodiment of the present invention, Figure 6 As shown, the torsion assembly 143 includes a ball 1431, a slide 1432 and a spring 1433. The slide 1432 is slidably set in the adjustment groove 15. The spring 1433 is set on the side of the slide 1432 away from the rotor 142. A plurality of balls 1431 are set in a circular array on the side of the slide 1432 close to the rotor 142. A ball groove for placing the balls 1431 is opened on the side of the rotor 142 close to the slide 1432.

[0047] In this embodiment, by providing a ball 1431 between the slide 1432 and the rotor 142, the ball 1431 can be used to connect the rotor 142 to the slide 1432, and then the slide 1432 can maintain a stable connection with the rotor 142 under the pressure provided by the spring 1433 to the slide 1432, so that when the rotor 142 rotates, it can rotate with the threaded sleeve 141 through the slide 1432, which is used for the installation of the short shaft 72 and the long shaft 71.

[0048] The spring 1433 is configured to deform when the pressure between the rotor 142 and the slide 1432 increases until the slide 1432 is separated from the rotor 142 , and can be used to separate the slide 1432 from the rotor 142 to provide protection for the long shaft 71 .

[0049] In a further preferred embodiment of the present invention, Figure 2 and Figure 4 As shown, pin grooves 16 are provided at four corners of the upper mold 1 close to the lower mold 2 , and positioning pins 17 inserted into the pin grooves 16 are fixedly connected to the four corners of the lower mold 2 .

[0050] In this embodiment, by providing the positioning pin 17 and the pin groove 16, the upper mold 1 and the lower mold 2 can be installed more conveniently, and the stability after installation can be improved, which can effectively improve the ease of use of the four-outlet tube cavity mold.

[0051] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A four-outlet tube cavity mold, comprising an upper mold (1) and a lower mold (2), characterized in that: The top of the lower mold (2) is convexly formed with an injection molding platform (3), the bottom of the upper mold (1) is provided with an avoidance groove (4) for covering the injection molding platform (3), the intersection of the injection molding platform (3) and the avoidance groove (4) is provided with an injection molding groove (5) for injection molding a four-way pipe, and the two injection molding grooves (5) are spliced ​​to form a complete injection molding cavity, the top of the upper mold (1) is provided with an injection molding port (6) connected to the injection molding groove (5), and the outer side wall of the upper mold (1) is provided with a shaping piece (7) for inserting into the injection molding groove (5).

2. A four-outlet tube cavity mold according to claim 1, characterized in that: The shaping member (7) is composed of a long axis (71) and two short axes (72); the inner side wall of the avoidance groove (4) located at one of the branches of the injection groove (5) is provided with a positioning slot (8); the inner side walls of the avoidance groove (4) located at the other three branches of the injection groove (5) are provided with positioning holes (9) penetrating the upper mold (1); The long axis (71) is inserted into the positioning insertion hole (9) opposite to the positioning slot (8), and one end of the long axis (71) close to the injection slot (5) passes through the injection slot (5) and is inserted into the positioning slot (8); The two short shafts (72) are respectively arranged on both sides of the long shaft (71), and one end of the two short shafts (72) close to the injection groove (5) passes through the corresponding positioning plug hole (9) and contacts the long shaft (71).

3. A four-outlet tube cavity mold according to claim 2, characterized in that: Two inclined surfaces (10) are symmetrically provided at the end of the short axis (72) close to the long axis (71); the two inclined surfaces (10) are rounded at the corners of one side close to the long axis (71), so that the middle surface of the two inclined surfaces (10) forms a round surface (11) for smooth transition; and the outer side wall of the long axis (71) is provided with a positioning groove (12) that fits the inclined surface (10).

4. A four-outlet tube cavity mold according to claim 2, characterized in that: The upper mold (1) is provided with a threaded hole (13) at the opening of the positioning insertion hole (9), and is threadedly connected to an adjusting knob (14); the ends of the long axis (71) and the short axis (72) away from the injection molding groove (5) are respectively rotatably connected to the corresponding adjusting knob (14).

5. A four-outlet tube cavity mold according to claim 4, characterized in that: The adjusting knob (14) is composed of a threaded sleeve (141), a rotor (142) and a torque assembly (143); the threaded sleeve (141) is threadedly connected in a threaded groove; an adjusting groove (15) is provided on a side of the threaded sleeve (141) away from the injection groove (5); a rotor (142) is rotatably connected to the opening of the adjusting groove (15); and an overtightening-preventing torque assembly (143) is provided between the rotor (142) and the adjusting groove (15).

6. A four-outlet tube cavity mold according to claim 5, characterized in that: The torque assembly (143) comprises a ball (1431), a slide (1432) and a spring (1433); the slide (1432) is slidably arranged in the adjustment groove (15); a spring (1433) is arranged on a side of the slide (1432) away from the rotor (142); a plurality of balls (1431) are arranged in a circular array on a side of the slide (1432) close to the rotor (142); and a ball groove for receiving the balls (1431) is provided on a side of the rotor (142) close to the slide (1432).

7. A four-outlet tube cavity mold according to claim 1, characterized in that: Pin grooves (16) are provided at four corners of one side of the upper mold (1) close to the lower mold (2), and positioning pins (17) inserted into the pin grooves (16) are fixedly connected to the four corners of the lower mold (2).

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