CN216760694U - Ejecting limit structure of mould - Google Patents

Abstract

The utility model provides a mold ejection limiting structure, which belongs to the technical field of molds. It solves the problem of damage to the moving module or product caused by the wrong ejection of the existing mold. The mold ejection limit structure, the mold includes a fixed module, a movable module arranged slidably along the lateral direction, and an ejector plate located below the fixed module and capable of sliding vertically, the movable module and the fixed module are closed to form a molding cavity, and the ejection The plate is fixed with an ejector rod that ejects the products in the molding cavity when the ejector plate slides vertically. The ejector limit structure includes a base fixed on the movable module and a movable module that slides vertically through the fixed module. Between the guide rod and the movable guide rod, there is a connecting rod that can drive the movable guide rod to move vertically. When the fixed module and the movable module are opened, the base drives the connecting rod to swing so that the movable guide rod moves upward to separate from the ejector plate. The mold ejection limit structure avoids the damage to the product caused by the wrong ejection.

Description

A mold ejection limit structure

technical field

The utility model belongs to the technical field of moulds, and relates to a mould ejection limiting structure.

Background technique

Existing injection molds usually form a cavity by clamping the movable module and the fixed module, and inject unformed plastic into the cavity from the injection port. After injection molding, the molded part is usually ejected through the ejector pin in the mold. , so as to complete the demoulding, and the existing mold demolding directions include horizontal demoulding and vertical demoulding, both of which are relatively common.

For example, Chinese patent application [Authorization Announcement No.: CN210969787U] discloses a super-hemispherical resin optical protective cover injection molding demoulding, including a mold base plate, and the mold base bottom plate is sequentially provided with a first thimble fixing plate and a first thimble plate from bottom to top , The second thimble fixing plate and the second thimble plate, the right end of the bottom plate of the mold base is provided with a limit rod for limiting the ejection stroke, and the upper end of the limit rod passes through the first thimble fixing plate, the first thimble plate and the second thimble in turn The fixing plate and the second thimble plate are fixed on the lower surface of the back mold pad, and the second thimble fixing plate is provided with a thimble for ejecting the product.

Although the above structure limits the ejection stroke by the limit rod, and the ejector pin pushes out the product, the setting of the limit rod limits the stroke of the first ejector pin fixing plate and the first ejector pin plate, and also limits the stroke of the second ejector pin. The fixed plate and the second thimble plate are guided to make the whole demolding process smoother. During the mold opening process, since the thimble is directly set around the cavity, it is convenient for the product to be directly ejected after the product is formed. During the molding process, since the ejector pin moves forward with the second ejector pin fixing plate and the second ejector pin plate to eject the product in the cavity, during this process, it cannot be guaranteed that the ejector pin will eject the product after the mold is completely opened. , If the mold is in the mold opening process, the ejector pin may be ejected by mistake, and the ejector pin directly ejects will cause damage to the components in the mold and the product, thereby affecting the qualification rate of the product and the service life of the mold.

SUMMARY OF THE INVENTION

The purpose of this utility model is to solve the above-mentioned problems in the existing technology, and propose a mold ejection limit structure. The technical problem to be solved by this utility model is: how to solve the damage to the moving module or product caused by the wrong ejection The problem.

The purpose of this utility model can be realized by following technical scheme:

A mold ejection limit structure, the mold includes a fixed module, a movable module arranged slidably along the lateral direction, and an ejector plate positioned below the fixed module and capable of sliding vertically, and a molding cavity is formed between the movable module and the fixed module. , the ejector plate is fixedly connected with an ejector rod that ejects the product in the molding cavity when the ejector plate slides vertically, and it is characterized in that the ejection limit structure includes a base fixed on the movable module and a flange. The movable guide rod vertically slides through the fixed module, and a connecting rod that can drive the movable guide rod to move vertically is arranged between the base and the movable guide rod. When the movable module and the fixed module are in the clamping state, the movable guide rod The lower end is vertically pressed against the ejector plate, and when the fixed module and the movable module are opened, the base drives the connecting rod to swing so that the movable guide rod moves upward to separate from the ejector plate.

Working principle: After the movable module and the fixed module are closed, the unformed plastic is injected into the molding cavity. At this time, the movable module and the fixed module are closed, and the lower end of the movable guide rod on the base has been vertically abutting against the ejector plate. , to limit the position of the ejector plate to avoid the upward movement of the ejector plate. When demoulding, the movable module opens the mold in the lateral direction, and the movable module drives the base fixedly connected with the movable module to move laterally together, and the movement of the base will cause It drives the swing of the connecting rod hinged with the base, and drives the movable guide rod connected with the connecting rod to move upward. At this time, the movable guide rod is separated from the ejector plate. The product is ejected to avoid that the ejector plate will drive the ejector pins to move up when the movable module and the fixed module are not opened. Since the movable module needs to move laterally when demoulding, and the ejector plate needs to move vertically, the ejection limit The mechanism is provided with a connecting rod, which drives the movable guide rod to move upwards to release the limit on the ejector plate. In this solution, the movable module must drive the base to move the movable guide rod upwards, and then the ejector plate can be lifted up. It avoids the damage to the moving module or the product caused by the wrong ejection of the ejector pin, thereby improving the qualification rate of the product and the service life of the mold.

In the above-mentioned mold ejection limit structure, one end of the connecting rod is hinged with the base, and the other end of the connecting rod is hinged with the movable guide rod. When the movable module and the fixed module are in the clamping state, the connecting rod and the movable The guide rods are coaxially arranged, and when the movable module opens the mold laterally, the connecting rod moves with the base to be inclined toward the mold opening direction and drives the movable guide rods to slide vertically.

When the mold is in the clamping state, the connecting rod and the movable guide rod are coaxially arranged, and both the connecting rod and the movable guide rod are set vertically at this time, so that the movable guide rod can limit the ejector plate more stably, and the connecting rod is vertical The setting can be more stably abutted with the base without displacement, and when the movable module is laterally opened, the connecting rod is inclined with the base, and the movable guide rod is limited by the fixed module. The vertical sliding makes the movable guide rod separate from the ejector plate, which improves the stability of the ejector limit structure.

In the above-mentioned mold ejection limit structure, the fixed module is provided with a ceding chute for the base to be placed, the base can slide laterally along the ceding chute, and the bottom surface of the base is always in line with the ceding chute. The lower groove wall of the bit chute is fitted.

By opening the escaping chute, the sliding of the base can be guided, and at the same time, the lower groove wall of the slackening chute can support the bottom surface of the base. At this time, most of the weight of the base can be transferred to the fixed module, so that when the base When most of the seat slides out of the yield chute, the lower groove wall of the yield chute always supports the base, which further ensures that the base has little influence on the moving module during the sliding process, and also facilitates the moving module to drive the base. The seat slides, so that after the movable module slides, the movable guide rod connected with the base can move up quickly without affecting the demoulding of the mold.

In the above-mentioned mold ejection limit structure, one end of the base is provided with an installation groove vertically penetrating the base, one end of the connecting rod is embedded in the installation groove and hinged with the base, and the installation groove has a direction toward the base. When the fixed module and the movable module open the mold, the connecting rod swings until part of the opening is located in the recessed opening.

The setting of the installation groove makes the rotation of the connecting rod smoother, and the setting of the abdication opening allows the base to give way to the connecting rod to the maximum extent while ensuring the structural strength, so as to avoid the connection when the connecting rod rotates. The rod causes interference, so that the movable guide rod can move up quickly when the mold is opened, without affecting the mold opening efficiency.

In the above-mentioned mold ejection limit structure, the base is provided with a fixing hole 1 and a fixing hole 2, both located on one side of the connecting rod. The ejection limit structure further includes a positioning pin and a fastener. The first fixing hole is located at one end away from the connecting rod, the fastener is inserted in the fixing hole 1 from top to bottom and the moving module is fixedly connected with the base, and the positioning pin is passed through the fixing hole 2 from the bottom to the top. It is arranged in the moving module to position the moving module and the base.

The fasteners are inserted in the fixing hole 1 from top to bottom, and the positioning pins are inserted in the moving module from bottom to top. Through the connection in different directions from top to bottom, the fasteners can be prevented from shaking when the base is shaken. Provide upward pulling force, and the positioning pin can provide upward supporting force, which ensures the connection between the base and the moving module is more stable, avoids the loosening of the fasteners during long-term use, and further improves the ejection The stability of the limit structure.

In the above-mentioned mold ejection limit structure, the fixed module is provided with a placement slot that communicates with the escaping chute, one end of the movable guide rod is located in the placement slot, and the outer wall of the movable guide rod is connected to the placement slot. There are gaps between the side walls.

There is a gap between the outer wall of the movable guide rod and the side wall of the placement slot, so that the friction between the movable guide rod and the fixed module is reduced during the up and down sliding process of the movable guide rod, and the sticking of the movable guide rod is avoided. The rotation of the connecting rod also reduces the demoulding force required to push the moving module, making the demoulding of the mold more convenient and fast.

In the above-mentioned mold ejection limit structure, the fixed module is provided with a through hole at the bottom of the placement groove for the movable guide rod to pass through, and the outer wall of the movable guide rod is in contact with the hole wall of the through hole. , one end of the movable guide rod has a limit ring that protrudes radially outward, and the outer diameter of the limit ring is larger than the diameter of the through hole.

The setting of the through hole prevents the moving guide rod from tilting when the connecting rod drives the moving guide rod to move up, and the setting of the limit ring can limit the moving guide rod. The upper end of the guide rod can be stably arranged in the placement groove, which improves the stability of the ejection limit structure.

In the above-mentioned mold ejection limiting structure, the lower end of the fixed module is provided with a notch communicating with the through hole, the movable guide rod is partially located in the notch, and there is a gap between the movable guide rod and the notch.

The setting of the gap and the above-mentioned gap makes the upper and lower ends of the moving guide rod not in contact with the fixed module, and the middle part of the moving guide rod is limited by the through hole, so that the sliding stability of the moving guide rod can be ensured while also being stable. The friction between the movable guide rod and the fixed module is reduced, and the larger force required for the movable module to open the mold is reduced, so that the mold opening is more labor-saving.

In the above-mentioned mold ejection limiting structure, the movable guide rod includes a connecting portion hinged with the connecting rod and an extension portion capable of abutting against the ejection plate, and one end of the connecting portion is fixedly connected with one end of the extension portion.

The connection part and the extension part are arranged, so that when the ejection limit structure needs to be applied to different molds, the extension part of different length can be replaced, so that in the mold clamping state, the bottom of the extension part can abut against the ejector plate That is, so as to enhance the applicability of the ejection limiting structure.

In the above-mentioned mold ejection limiting structure, one end of the elongated portion protrudes to form a threaded column, and one end of the connecting portion is provided with a threaded hole, and the threaded column can be inserted into the threaded hole to fix the connecting portion and the elongated portion. even.

The arrangement of the structure makes the connection between the extension part and the connecting part more convenient, and the screw connection is more stable, and the phenomenon of dislocation after connection will not occur.

Compared with the prior art, the mold ejection limit structure has the following advantages:

1. When the movable module and the fixed module are clamped, the lower end of the movable guide rod on the base always vertically abuts against the ejector plate to prevent the ejector plate from moving upward. When demoulding, the movable module drives the movable module to be firmly connected to the movable module. The base moves laterally together, the movement of the base will drive the swing of the connecting rod hinged with the base, and drive the moving guide rod connected with the connecting rod to move upward, at this time the moving guide rod is separated from the ejector plate, and the ejector plate The upward movement can drive the ejector needle to move upward to eject the product in the molding cavity, so as to avoid that the ejector plate will drive the ejector needle to move up when the movable module and the fixed module are not opened.

2. The setting of the side chute makes the base slide only with the moving module without falling, etc., and the support of the lower groove wall of the side chute to the lower side of the base makes the base When the moving module slides, when most of the base slides out of the way-out chute, the lower groove wall of the way-out chute always supports the base, which further ensures that the base has less influence on the moving module during the sliding process. Small.

3. The fasteners are inserted in the fixing hole 1 from top to bottom, and the positioning pins are inserted in the moving module from bottom to top. Through the connection in different directions from top to bottom, it avoids tightening when the base shakes. The fasteners can provide upward pulling force, and the positioning pin can provide upward supporting force, which ensures a more stable connection between the base and the moving module, avoids the fasteners being easily loosened during long-term use, and further improves the The stability of the ejector limit structure.

Description of drawings

FIG. 1 is a schematic structural diagram of the mold ejection limit structure when the mold is closed.

FIG. 2 is a schematic structural diagram of the mold ejection limit structure when the mold is opened.

FIG. 3 is a partial enlarged view of A in FIG. 2 .

FIG. 4 is a schematic structural diagram of the ejection limiting structure of the mold.

FIG. 5 is a top view of the ejection limiting structure of the mold.

FIG. 6 is a cross-sectional view taken along A-A in FIG. 5 .

In the figure, 1, moving module; 2, fixed module; 21, yielding chute; 22, placing slot; 22a, gap; 23, through hole; 24, gap; 24a, gap; 3, ejector plate; 4, Molding cavity; 5, ejector rod; 6, base; 61, installation slot; 62, give way; 63, fixed hole one; 64, fixed hole two; 7, connecting rod; 8, movable guide rod; 81, limit Ring; 82, connecting part; 82a, threaded hole; 83, extension part; 83a, threaded post; 9, locating pin; 10, fastener.

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

As shown in Figure 1, the mold is ejected from the limit structure. The mold includes a fixed module 2, a movable module 1 that slides laterally, and an ejector plate 3 that is located below the fixed module 2 and can slide vertically. The movable module 1 A molding cavity 4 is formed by mold clamping with the fixed module 2 , and the ejector plate 3 is fixedly connected with an ejector rod 5 for ejecting the products in the molding cavity 4 when the ejector plate 3 slides vertically.

Specifically, as shown in FIGS. 1-6 , the ejection limiting structure includes a base 6 fixed on the movable module 1 and a movable guide rod 8 that slides through the fixed module 2 in the vertical direction. The base 6 is connected to the movable module 2 . A connecting rod 7 that can drive the movable guide rod 8 to move vertically is provided between the guide rods 8. When the movable module 1 and the fixed module 2 are in the clamping state, the lower end of the movable guide rod 8 is vertically pressed against the ejector plate 3, When the fixed module 2 and the movable module 1 are opened, the base 6 drives the connecting rod 7 to swing so that the movable guide rod 8 moves upward to separate from the ejector plate 3 .

Working principle: In this scheme, the movable module is opened horizontally. After the movable module 1 and the fixed module 2 are closed, the unformed plastic is injected into the molding cavity 4. At this time, the movable module 1 and the fixed module 2 are closed. The lower end of the movable guide rod 8 on the base 6 has been vertically abutting against the ejector plate 3 to prevent the ejector plate 3 from moving upward. The base 6 fixedly connected to the module 1 moves laterally together, the movement of the base 6 will drive the swing of the connecting rod 7 hinged with the base 6, and drive the movable guide rod 8 connected with the connecting rod 7 to move upward. The rod 8 is separated from the ejector plate 3, and the ejector plate 3 can move upward to drive the ejector pin to move upward to eject the product in the molding cavity 4, so as to avoid the ejector plate 3 driving the mold when the movable module 1 and the fixed module 2 are not opened. When the ejector pin moves up, since the moving direction of the movable module 1 and the ejector plate 3 are inconsistent, the movable module 1 needs to move laterally when demoulding, while the ejector plate 3 needs to move vertically, so the ejector limit mechanism is provided with a connecting rod 7. Drive the moving guide rod 8 to move upward through the connecting rod 7 to release the limit on the ejector plate 3. In this solution, the moving module 1 must drive the base 6 to move the moving guide rod 8 upward. At this time, the ejector plate 3 It can be moved up, avoiding the damage to the movable module 1 or the product caused by the wrong ejection of the ejector pin, thereby improving the qualification rate of the product and the service life of the mold.

As shown in Figure 1-3, one end of the connecting rod 7 is hinged with the base 6, and the other end of the connecting rod 7 is hinged with the movable guide rod 8. When the movable module 1 and the fixed module 2 are in the clamping state, the connecting rod 7 and the movable guide rod 8 are hinged. The guide rods 8 are coaxially arranged, and when the movable module 1 opens the mold horizontally, the connecting rod 7 moves with the base 6 to be inclined toward the mold opening direction and drives the movable guide rods 8 to slide vertically; The escalating chute 21 on which the base 6 is placed, the base 6 can slide laterally along the escalating chute 21 and the bottom surface of the base 6 is always in contact with the lower groove wall of the escalating chute 21 .

As shown in Figures 3-6, one end of the base 6 is provided with an installation groove 61 vertically extending through the base 6, one end of the connecting rod 7 is embedded in the installation groove 61 and hinged with the base 6, and the installation groove 61 has an inward depression When the fixed module 2 and the movable module 1 are opened, the connecting rod 7 swings to be partially located in the opening 62, and the base 6 is provided with a fixing hole 63 located on one side of the connecting rod 7 and a fixed hole 63. Hole two 64, this ejection limit structure also includes a positioning pin 9 and a fastener 10, a fixing hole 63 is located at one end away from the connecting rod 7, and the fastener 10 is penetrated from top to bottom in the fixing hole one 63 and is The moving module 1 is fixedly connected with the base 6 , and the positioning pin 9 passes through the second fixing hole 64 from bottom to top and is inserted into the moving module 1 to position the moving module 1 and the base 6 .

The setting of the installation groove 61 makes the rotation of the connecting rod 7 smoother, and the setting of the relinquishment opening 62 enables the base 6 to give way to the connecting rod 7 to the maximum extent while ensuring the structural strength, and the fasteners 10 is penetrated in the fixing hole 1 63 from top to bottom, and the positioning pin 9 is penetrated in the moving module 1 from bottom to top. The fastener 10 can provide an upward pulling force, and the positioning pin 9 can provide an upward supporting force, which ensures a more stable connection between the base 6 and the moving module 1, and prevents the fastener 10 from being easily loosened during long-term use. , which further improves the stability of the ejector limit structure.

As shown in Figures 1-3, the fixed module 2 is provided with a placement slot 22 that communicates with the escaping chute 21, one end of the movable guide rod 8 is located in the placement slot 22, and the outer wall of the movable guide rod 8 is in contact with the placement slot 22. There is a gap 22a between the side walls, the fixed module 2 is provided with a through hole 23 at the bottom of the slot 22 for the movable guide rod 8 to pass through, and the outer wall of the movable guide rod 8 is fitted with the hole wall of the through hole 23, One end of the movable guide rod 8 has a limit ring 81 that protrudes radially outward. The outer diameter of the limit ring 81 is larger than the diameter of the through hole 23. The lower end of the fixed module 2 is provided with a gap 24 communicating with the through hole 23. The rod 8 is partially located in the notch 24 , and there is a gap 24 a between the movable guide rod 8 and the notch 24 .

The gap 24a and the gap 22a are set so that the upper and lower ends of the movable guide rod 8 are not in contact with the fixed module 2, and the middle of the movable guide rod 8 is limited by the through hole 23, so as to ensure the sliding of the movable guide rod 8. The stability can also reduce the friction between the movable guide rod 8 and the fixed module 2, reduce the large force required for the movable module 1 to open the mold, and make the mold opening more labor-saving.

As shown in FIG. 6 , the movable guide rod 8 includes a connecting portion 82 hinged with the connecting rod 7 and an extension portion 83 that can abut against the ejector plate 3 . One end of the connecting portion 82 is fixedly connected to one end of the extension portion 83 , and the extension portion One end of 83 protrudes to form a threaded post 83a, and one end of the connecting portion 82 is provided with a threaded hole 82a.

The connection portion 82 and the extension portion 83 are arranged so that when the ejection limiting structure needs to be applied to different molds, the extension portion 83 with different lengths can be replaced, so that in the mold clamping state, the bottom of the extension portion 83 can match the top portion. The ejection plates 3 only need to abut against each other, thereby enhancing the applicability of the ejection limiting structure.

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or replace them in similar ways, but will not deviate from the spirit of the present invention or go beyond the appended claims the defined range.

Claims (10)

1. A mold ejection limiting structure comprises a fixed module (2), a movable module (1) arranged along a transverse sliding direction and an ejector plate (3) which is positioned below the fixed module (2) and can vertically slide, wherein a molding cavity (4) is formed by mold closing between the movable module (1) and the fixed module (2), an ejector rod (5) which ejects a product in the molding cavity (4) when the ejector plate (3) vertically slides is fixedly connected to the ejector plate (3), the mold ejection limiting structure is characterized by comprising a base (6) fixed on the movable module (1) and a movable guide rod (8) which vertically slides to penetrate through the fixed module (2), a connecting rod (7) capable of driving the movable guide rod (8) to vertically move is arranged between the base (6) and the movable guide rod (8), and when the movable module (1) and the fixed module (2) are vertically pressed against the ejector plate (3) at the lower end of the movable guide rod (8) in a mold closing state, when the fixed module (2) and the movable module (1) are opened, the base (6) drives the connecting rod (7) to swing so as to enable the movable guide rod (8) to move upwards to be separated from the ejector plate (3).

2. The die ejection limiting structure according to claim 1, wherein one end of the connecting rod (7) is hinged to the base (6), the other end of the connecting rod (7) is hinged to the movable guide rod (8), the connecting rod (7) and the movable guide rod (8) are coaxially arranged in a die assembly state of the movable die block (1) and the fixed die block (2), and the connecting rod (7) moves to be obliquely arranged towards a die opening direction along with the base (6) and drives the movable guide rod (8) to vertically slide when the movable die block (1) is transversely opened.

3. The mold ejection limiting structure according to claim 1, wherein the fixed mold block (2) is provided with an abdicating chute (21) for placing the base (6), the base (6) can transversely slide along the abdicating chute (21) and the bottom surface of the base (6) is always attached to the lower chute wall of the abdicating chute (21).

4. The mold ejection limiting structure according to claim 1, 2 or 3, wherein one end of the base (6) is provided with a mounting groove (61) vertically penetrating through the base (6), one end of the connecting rod (7) is embedded into the mounting groove (61) and hinged to the base (6), the mounting groove (61) is provided with an inward-recessed position-giving opening (62), and the connecting rod (7) swings to be partially positioned in the position-giving opening (62) when the fixed module (2) and the movable module (1) are opened.

5. The mold ejection limiting structure according to claim 1, 2 or 3, wherein the base (6) is provided with a first fixing hole (63) and a second fixing hole (64) which are both located on one side of the connecting rod (7), the mold ejection limiting structure further comprises a positioning pin (9) and a fastener (10), the first fixing hole (63) is located at one end far away from the connecting rod (7), the fastener (10) is arranged in the first fixing hole (63) in a penetrating manner from top to bottom and fixedly connects the movable module (1) with the base (6), and the positioning pin (9) passes through the second fixing hole (64) from bottom to top and is arranged in the movable module (1) in a penetrating manner to position the movable module (1) and the base (6).

6. The die ejection limiting structure according to claim 3, wherein a placing groove (22) communicated with the abdicating chute (21) is formed in the fixed die block (2), one end of the movable guide rod (8) is located in the placing groove (22), and a gap (22a) is formed between the outer wall of the movable guide rod (8) and the side wall of the placing groove (22).

7. The mold ejection limiting structure according to claim 6, wherein a through hole (23) through which the movable guide rod (8) can penetrate is formed in the bottom of the placing groove (22) of the fixed module (2), the outer wall of the movable guide rod (8) is attached to the wall of the through hole (23), a radially outwardly protruding limiting ring (81) is arranged at one end of the movable guide rod (8), and the outer diameter of the limiting ring (81) is larger than the diameter of the through hole (23).

8. The die ejection limiting structure according to claim 7, wherein a notch (24) communicated with the through hole (23) is formed at the lower end of the fixed die block (2), the movable guide rod (8) is partially positioned in the notch (24), and a gap (24a) is formed between the movable guide rod (8) and the notch (24).

9. The die ejection limiting structure according to claim 1, 2 or 3, wherein the movable guide rod (8) comprises a connecting portion (82) hinged to the connecting rod (7) and an elongated portion (83) capable of abutting against the ejection plate (3), and one end of the connecting portion (82) is fixedly connected with one end of the elongated portion (83).

10. The die ejection limiting structure according to claim 9, wherein a threaded column (83a) is formed at one end of the elongated portion (83) in a protruding manner, a threaded hole (82a) is formed at one end of the connecting portion (82), and the threaded column (83a) can be embedded into the threaded hole (82a) to fixedly connect the connecting portion (82) and the elongated portion (83).

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