CN220008668U - Pipe fitting inner hole forming mechanism applied to injection mold and injection mold - Google Patents

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a pipe fitting inner hole forming mechanism applied to an injection mold and the injection mold, comprising a sliding mounting seat, a pressing piece, an insert pin sleeve, a first elastic piece, a first mounting groove, a second mounting groove, a forming insert pin and a second elastic piece.

Description

Pipe fitting inner hole forming mechanism applied to injection mold and injection mold

[ field of technology ]

The utility model belongs to the technical field of injection molds, and particularly relates to a pipe fitting inner hole forming mechanism applied to an injection mold and the injection mold.

[ background Art ]

When the existing injection mould is used for injection molding of pipe fitting products with inner holes, a line needle is required to extend into a space between a front mould core and a rear mould core to jointly form a pipe fitting cavity so as to injection mold the pipe fitting products, the inner holes on the pipe fitting products are required to be formed by inserting molding insert needles into the pipe fitting cavity through injection molding, the existing molding insert needles cannot be tightly abutted against the line needle in the injection molding process after being inserted into the pipe fitting cavity, a gap is formed between the molding insert needles and the line needle, and burrs are generated in the inner holes on the injection molded pipe fitting products.

[ utility model ]

The utility model provides a pipe fitting inner hole forming mechanism applied to an injection mold aiming at the problems pointed out by the background technology.

The utility model is realized by the following technical scheme:

be applied to pipe fitting hole forming mechanism of injection mould, include:

the sliding installation seat is arranged on the upper die or the lower die, a first chute is arranged on the sliding installation seat, and a second chute communicated with the first chute, a third chute communicated with the second chute and a fourth chute communicated with the third chute are sequentially arranged on one side, close to the upper die or the lower die, of the sliding installation seat;

the pressing piece is movably arranged in the first sliding groove, and one end of the pressing piece extends into the second sliding groove;

one end of the needle embedding sleeve is movably arranged in the fourth chute, and the other end of the needle embedding sleeve extends into the second chute and is connected with the pressing piece;

the first elastic piece is arranged in the third sliding groove and sleeved on the needle inserting sleeve, and is used for enabling the needle inserting sleeve to keep a trend of moving towards the direction close to the first sliding groove, namely pushing the pressing piece to enable the pressing piece to keep a trend of moving towards the direction of extending out of the sliding mounting seat;

the first mounting groove is formed in one end, close to the needle embedding sleeve, of the pressing piece;

the second mounting groove is formed in one end, close to the pressing piece, of the insert needle sleeve, and is communicated with the first mounting groove;

one end of the molding insert pin movably extends into the second mounting groove, and the other end extends out of the insert pin sleeve;

and the second elastic piece is arranged between the forming insert pin and the pressing piece and is used for keeping the trend of moving the forming insert pin away from the pressing piece.

The pipe fitting inner hole forming mechanism applied to the injection mold as described above further comprises:

the first limiting protrusion is arranged at one end of the pressing piece, which is positioned in the second sliding groove, and is used for limiting the pressing piece to move in the direction away from the needle embedding sleeve;

the second limiting protrusion is arranged at one end of the forming insert pin extending into the second mounting groove.

The pipe fitting inner hole forming mechanism is applied to the injection mold, the second limiting bulge is provided with the limiting notch, the second mounting groove is internally provided with the limiting boss matched with the limiting notch, and when the second limiting bulge is positioned in the second mounting groove, the limiting boss is matched with the limiting notch so as to limit the forming insert pin to rotate relative to the insert pin sleeve.

The pipe fitting inner hole forming mechanism applied to the injection mold is provided with the connecting holes, and the two connecting holes are oppositely arranged on two sides of the first sliding groove.

The pipe fitting inner hole forming mechanism applied to the injection mold is characterized in that the circumference side of the insert sleeve, which is close to one end of the pressing piece, is provided with the insert sleeve convex ring, and the first elastic piece is arranged between the bottom of the third chute and the insert sleeve convex ring.

Compared with the prior art, the utility model has the following advantages:

the utility model provides a pipe fitting inner hole forming mechanism applied to an injection mold, which comprises a sliding mounting seat, a pressing piece, an insert pin sleeve, a first elastic piece, a first mounting groove, a second mounting groove, a forming insert pin and a second elastic piece, wherein when the mold is closed, the pressing piece pushes the insert pin sleeve to compress the first elastic piece and pushes the forming insert pin to move towards the direction close to a cavity so as to be inserted into the cavity, and the second elastic piece keeps the forming insert pin away from the trend of the pressing piece, so that the forming insert pin inserted into the cavity keeps abutting against a slide pin, the forming insert pin is tightly abutted against the slide pin in the injection molding process, and the inner hole of a product after injection molding is effectively prevented from spreading.

The utility model also provides an injection mold, which comprises the pipe fitting inner hole forming mechanism applied to the injection mold, an upper mold, a lower mold opposite to the upper mold and a row needle arranged between the upper mold and the lower mold, wherein a cavity is arranged among the upper mold, the lower mold and the row needle, the sliding mounting seat is arranged on the lower mold, when the mold is closed, the pressing piece pushes the needle sleeve to compress the first elastic piece and pushes the forming needle to move towards the direction close to the cavity so as to be inserted into the cavity, and the second elastic piece is used for keeping the forming needle to move towards the direction far away from the pressing piece so as to keep the forming needle inserted into the cavity in contact with the row needle.

As described above, in the injection mold, when the molding insert pin is abutted against the slide pin, a distance d is provided between the bottom of the second mounting groove and the second limiting protrusion.

As described above, the injection mold comprises an upper mold blank and an upper mold core embedded on the upper mold blank, wherein an upper parting surface is arranged on the lower surface of the upper mold core, the lower mold comprises a lower mold blank and a lower mold core embedded on the lower mold blank, a lower parting surface is arranged on the upper surface of the lower mold core, a line needle is arranged between the upper parting surface and the lower parting surface, and the upper parting surface, the lower parting surface and the line needle jointly form the cavity.

The injection mold further comprises an insert pin jacking mechanism, wherein the insert pin jacking mechanism is used for jacking the jacking piece to move towards the direction close to the cavity when the mold is closed, so that the molding insert pin is pushed to be inserted into the cavity.

As described above, the sliding mounting seat is embedded on the lower die core, and the lower die core is provided with a yielding through groove for the insert pin jacking mechanism to jack the jacking piece.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

FIG. 1 is a schematic perspective view of an injection mold according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 in the direction A-A;

FIG. 3 is an enlarged view of portion a of FIG. 2;

FIG. 4 is an enlarged view of section b of FIG. 3;

fig. 5 is a schematic perspective view of a molded insert according to an embodiment of the present utility model.

[ detailed description ] of the utility model

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

When embodiments of the present utility model refer to the ordinal terms "first," "second," etc., it is to be understood that they are merely used for distinguishing between them unless the order of their presentation is indeed dependent on the context.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In a specific embodiment, as shown in fig. 1-5, the pipe inner hole forming mechanism applied to the injection mold comprises a sliding mounting seat 71, a pressing piece 72, a needle sleeve 73, a first elastic piece 74, a first mounting groove 81, a second mounting groove 82, a forming needle 5 and a second elastic piece 84. The sliding mounting seat 71 is arranged on the upper die or the lower die, a first chute 9 is arranged on the sliding mounting seat 71, and a second chute 10 communicated with the first chute 9, a third chute 11 communicated with the second chute 10 and a fourth chute 20 communicated with the third chute 11 are sequentially arranged on one side, close to the upper die or the lower die, of the sliding mounting seat 71; the pressing piece 72 is movably arranged in the first chute 9, and one end of the pressing piece extends into the second chute 10; one end of the needle inserting sleeve 73 is movably arranged in the fourth chute 20, and the other end of the needle inserting sleeve extends into the second chute 10 to be connected with the pressing piece 72; the first elastic member 74 is disposed in the third sliding groove 11 and sleeved on the needle inserting sleeve 73, and is used for keeping the needle inserting sleeve 73 moving towards the direction close to the first sliding groove 9, i.e. pushing the pushing member 72 to keep the pushing member 72 moving towards the direction extending out of the sliding mounting seat 71; the first mounting groove 81 is arranged at one end of the pressing piece 72 close to the needle inserting sleeve 73; the second mounting groove 82 is arranged at one end of the insert sleeve 73 close to the pressing piece 72, and the second mounting groove 82 is communicated with the first mounting groove 81; one end of the molding insert 5 movably extends into the second mounting groove 82, and the other end extends out of the insert sleeve 73; the second elastic member 84 is disposed between the molding insert 5 and the pressing member 72, and is used for maintaining the tendency of the molding insert 5 to move away from the pressing member 72. When the mold is closed, the pressing piece slides to push the needle sleeve to compress the first elastic piece and push the molding needle to move towards the direction close to the mold cavity so as to be inserted into the mold cavity, and the second elastic piece enables the molding needle to keep a trend of moving away from the pressing piece, so that the molding needle inserted into the mold cavity keeps abutting against the line needle, the molding needle and the line needle are tightly abutted against each other in the injection molding process, and the inner hole of a product after injection molding is effectively prevented from spreading a burr. When the mold is opened, the first elastic member 74 resets and pushes the insert sleeve 73 to drive the pressing member 72 to extend out of the first sliding groove 9, and drives the molded insert 5 to be pulled away from the cavity 4, and cooperates with the bottom of the second sliding groove 10 through the first limiting protrusion 75 to prevent the pressing member 72 from being separated from the sliding mounting seat 71.

Specifically, the pipe inner hole forming mechanism applied to the injection mold further comprises a first limit protrusion 75 and a second limit protrusion 83. The first limiting protrusion 75 is disposed at one end of the pressing piece 72 located in the second chute 10, and is used for limiting the pressing piece 72 to move away from the needle inserting sleeve 73, so as to prevent the pressing piece 72 from being separated from the sliding mounting seat 71; the second limiting protrusion 83 is disposed on one end of the molding insert 5 extending into the second mounting groove 82, so as to prevent the molding insert from being separated from the insert sleeve 73.

In addition, the second limiting protrusion 83 is provided with a limiting notch 12, a limiting boss 13 matched with the limiting notch 12 is disposed in the second mounting groove 82, and when the second limiting protrusion 83 is located in the second mounting groove 82, the limiting boss 13 is matched with the limiting notch 12 to limit the rotation of the molded insert 5 relative to the insert sleeve 73.

Further, the sliding mounting seat 71 is provided with a connecting hole 21, and the two connecting holes 21 are oppositely disposed at two sides of the first chute 9. The bolts are matched with the connecting holes 21 to detachably mount the sliding mounting seat 71, so that the sliding mounting seat is convenient to detach and replace.

More specifically, the circumference of the insert sleeve 73 near one end of the pressing member 72 is provided with an insert sleeve convex ring 731, and the first elastic member 74 is disposed between the bottom of the third chute 11 and the insert sleeve convex ring 731. The first elastic member 74 is pressed against by the insert sleeve convex ring 731 on the one hand, and the contact area between the insert sleeve 73 and the presser 72 is increased by providing the insert sleeve convex ring 731 on the other hand.

The utility model also provides an injection mold, comprising the pipe fitting inner hole forming mechanism applied to the injection mold, an upper mold 1, a lower mold 2 opposite to the upper mold 1 and a slide pin 3 arranged between the upper mold 1 and the lower mold 2, wherein a cavity 4 is arranged between the upper mold 1, the lower mold 2 and the slide pin 3, the sliding mounting seat 71 is arranged on the lower mold 2, when the mold is closed, the ejector pin sleeve 73 is pushed by the ejector pin 72 to compress the first elastic piece 74 and push the forming insert 5 to move towards the direction approaching to the cavity 4 so as to be inserted into the cavity 4, and the second elastic piece 84 is used for keeping the forming insert 5 to move away from the ejector pin 72 so as to keep the forming insert 5 inserted into the cavity 4 to be in contact with the slide pin 3.

Further, when the molding insert 5 abuts against the slide pin 3, a distance d is provided between the bottom of the second mounting groove 82 and the second limiting protrusion 83. After the die assembly is ensured, the forming insert 5 stops moving in the direction away from the pressing piece 72 under the interference of the slide pin 3, and the forming insert 5 is kept to be in interference with the slide pin 3. Specifically, the spacing d=0.5 mm.

Still further, the upper die 1 includes an upper die blank 101 and an upper die core 102 embedded on the upper die blank 101, an upper parting surface 16 is provided on a lower surface of the upper die core 102, the lower die 2 includes a lower die blank 201 and a lower die core 202 embedded on the lower die blank 201, a lower parting surface 17 is provided on an upper surface of the lower die core 202, the row position needle 3 is disposed between the upper parting surface 16 and the lower parting surface 17, and the upper parting surface 16, the lower parting surface 17 and the row position needle 3 jointly form the cavity 4. Different cavities 4 can be formed by replacing the upper die core 102 and the lower die core 202, so that the cost is reduced and the production efficiency is improved.

Specifically, the injection mold further comprises an insert pin pushing mechanism 6, and the insert pin pushing mechanism 6 is used for pushing the pushing piece 72 to move towards the direction approaching to the cavity 4 when the mold is closed, so as to push the molding insert pin 5 to be inserted into the cavity 4. The insert pin jacking mechanism 6 may be configured to jack the jacking member 72 by using a pin that is disposed below the jacking member 72 and is movable up and down, and to move in a direction approaching the cavity 4, and to drive the pin to move up and down by using an air cylinder or the like.

More specifically, the insert pin pushing mechanism 6 of the present utility model includes a linkage push rod 61 movably disposed on the lower die 2 up and down, and a linkage pushing block 62 hinged on the lower die 2, wherein the lower end of the linkage push rod 61 is abutted against the linkage pushing block 62, the upper end of the linkage pushing block 62 can move upwards to extend out of the lower die 2, one end of the linkage pushing block 62 away from the linkage push rod 61 is abutted against the pushing block 72, when the mold is closed, the upper die 1 moves down to push the upper end of the linkage push rod 61 to move down, the linkage push rod 61 moves down to push the linkage pushing block 62 to enable the linkage pushing block 62 to overturn around a hinge shaft to push the pushing block 72, and then the pushing block 72 pushes the formed insert pin 5 to extend into the cavity 4 and collide with the slide pin 3. The linkage of the linkage push rod 61 and the linkage pressing block 62 is adopted to drive the forming insert pin 5 to be automatically inserted into the cavity 4 when the upper die and the lower die are closed, and the cavity 4 is automatically pulled out when the upper die and the lower die are opened, so that the production efficiency is improved.

In addition, the sliding mounting seat 71 is embedded on the lower die core 202, and the lower die core 202 is provided with a relief through groove 18 for the insert pin pressing mechanism 6 to press the pressing member 72. The ejector pin can extend into the ejector pin 72 for ejecting through the abdication through groove 18, or the linkage push rod 61 and the linkage ejector pin 62 can move.

Finally, the injection mold for preventing the inner hole from running out of the flash of the insert needle of the lower mold further comprises a row position driving mechanism 19 for driving the row position needle 3 to extend into or withdraw from between the upper mold core 102 and the lower mold core 202. And the production efficiency is improved.

The above description of one embodiment provided in connection with the specific content does not set forth limitation to the specific implementation of the present utility model, and is not limited to the above designations but is not limited to english designations due to the different industry designations. The method, structure, etc. similar to or identical to those of the present utility model, or some technical deductions or substitutions are made on the premise of the inventive concept, should be regarded as the protection scope of the present utility model.

Claims (10)

1. Be applied to pipe fitting hole forming mechanism of injection mould, its characterized in that includes:

the sliding installation seat (71) is arranged on the upper die or the lower die, a first chute (9) is arranged on the sliding installation seat (71), and a second chute (10) communicated with the first chute (9), a third chute (11) communicated with the second chute (10) and a fourth chute (20) communicated with the third chute (11) are sequentially arranged on one side, close to the upper die or the lower die, of the sliding installation seat (71);

a pressing piece (72) movably arranged in the first chute (9) and one end of which extends into the second chute (10);

one end of the needle inserting sleeve (73) is movably arranged in the fourth chute (20), and the other end of the needle inserting sleeve extends into the second chute (10) to be connected with the pressing piece (72);

a first elastic member (74) which is arranged in the third sliding groove (11) and sleeved on the needle inserting sleeve (73) and is used for keeping the needle inserting sleeve (73) to move towards the direction close to the first sliding groove (9), namely pushing the pushing piece (72) to keep the pushing piece (72) to move towards the direction extending out of the sliding mounting seat (71);

a first mounting groove (81) provided at one end of the presser (72) close to the insert sleeve (73);

a second mounting groove (82) which is arranged at one end of the insert sleeve (73) close to the pressing piece (72), wherein the second mounting groove (82) is communicated with the first mounting groove (81);

one end of the molding insert pin (5) movably extends into the second mounting groove (82), and the other end extends out of the insert pin sleeve (73);

and a second elastic member (84) provided between the molding insert (5) and the presser (72) for maintaining the tendency of the molding insert (5) to move away from the presser (72).

2. The pipe fitting female forming mechanism for an injection mold of claim 1, further comprising:

a first limit protrusion (75) arranged at one end of the pressing piece (72) in the second chute (10) and used for limiting the pressing piece (72) to move away from the insert sleeve (73);

and the second limiting bulge (83) is arranged at one end of the forming insert pin (5) extending into the second mounting groove (82).

3. The pipe fitting inner hole forming mechanism applied to the injection mold according to claim 2, wherein the second limiting protrusion (83) is provided with a limiting notch (12), a limiting boss (13) matched with the limiting notch (12) is arranged in the second mounting groove (82), and when the second limiting protrusion (83) is located in the second mounting groove (82), the limiting boss (13) is matched with the limiting notch (12) so as to limit the forming insert pin (5) to rotate relative to the insert pin sleeve (73).

4. Pipe fitting inner hole forming mechanism applied to injection molding according to claim 1, characterized in that the sliding mounting seat (71) is provided with connecting holes (21), and the two connecting holes (21) are oppositely arranged at two sides of the first sliding groove (9).

5. The pipe fitting inner hole forming mechanism applied to the injection mold according to claim 1, wherein a needle-inserting sleeve convex ring (731) is arranged on the circumference side of the needle-inserting sleeve (73) close to one end of the pressing piece (72), and the first elastic piece (74) is arranged between the bottom of the third sliding groove (11) and the needle-inserting sleeve convex ring (731).

6. An injection mold, characterized by comprising the pipe fitting inner hole forming mechanism applied to the injection mold according to claim 2 or 3, an upper mold (1), a lower mold (2) opposite to the upper mold (1), and a row needle (3) arranged between the upper mold (1) and the lower mold (2), wherein a cavity (4) is arranged between the upper mold (1), the lower mold (2) and the row needle (3), a sliding mounting seat (71) is arranged on the lower mold (2), and when the mold is closed, a pressing piece (72) pushes a needle sleeve (73) to compress a first elastic piece (74) and pushes a forming needle (5) to move towards a direction close to the cavity (4) so as to be inserted into the cavity (4), and a second elastic piece (84) is used for keeping the forming needle (5) to move away from the pressing piece (72) so as to keep the forming needle (5) inserted into the cavity (4) to be in a trend of abutting against the row needle (3).

7. An injection mould according to claim 6, characterized in that when the forming insert (5) is in contact with the slide pin (3), a distance d is provided between the bottom of the second mounting groove (82) and the second limit projection (83).

8. An injection mold according to claim 6, wherein the upper mold (1) comprises an upper mold blank (101) and an upper mold core (102) embedded on the upper mold blank (101), an upper parting surface (16) is arranged on the lower surface of the upper mold core (102), the lower mold (2) comprises a lower mold blank (201) and a lower mold core (202) embedded on the lower mold blank (201), a lower parting surface (17) is arranged on the upper surface of the lower mold core (202), the slide pin (3) is arranged between the upper parting surface (16) and the lower parting surface (17), and the upper parting surface (16), the lower parting surface (17) and the slide pin (3) jointly form the cavity (4).

9. An injection mold according to claim 8, further comprising an insert pin pushing mechanism (6), wherein the insert pin pushing mechanism (6) is configured to push the pushing member (72) to move toward the cavity (4) when the mold is closed, so as to push the molding insert pin (5) into the cavity (4).

10. An injection mold according to claim 9, wherein the sliding mounting seat (71) is embedded on the lower mold core (202), and a yielding through groove (18) for the insert needle pressing mechanism (6) to press the pressing piece (72) is formed on the lower mold core (202).