CN221233034U - Ejection mechanism matched with die and secondary parting die - Google Patents

Abstract

The utility model discloses a matched die ejection mechanism and a secondary parting die in the technical field of product injection molding, and aims to solve the problems that an existing demolding product is difficult to eject, easy to change and the like. The device comprises a first pull rod, a second pull rod, a base and a limit switch; the first pull rod is inserted into the base; the limit switch is arranged in the base, the tail end of the limit switch is elastically connected with the base, and the front end of the limit switch is contacted with the first pull rod; the second pull rod penetrates through the base and the limit switch; when the first pull rod operates within a longitudinal preset travel range of the first pull rod, the second drag hook at the head part of the second pull rod is in a clamping state with the limit switch; when the first pull rod moves downwards relative to the base until the limit switch is extruded by the first pull rod at the head of the first pull rod to move rightwards to a transverse preset stroke, the second drag hook is in a non-clamping state with the limit switch, and the second pull rod moves upwards to be separated from the limit switch and the base; the utility model is suitable for demolding products, and can improve the demolding efficiency and quality of the products.

Description

Ejection mechanism matched with die and secondary parting die

Technical Field

The utility model relates to a matched die ejection mechanism and a secondary parting die, and belongs to the technical field of product injection molding.

Background

When the mold is designed, a plurality of structures are often designed due to the limitation of product modeling, and the opening and closing sequence is controlled to realize molding or ejection. The existing common structure has the following problems:

In the existing mold structure with the front mold tunnel sliding block, before the front mold and the rear mold are opened, whether the front mold tunnel sliding block moves in place or not cannot be judged/controlled, and then the male mold and the female mold are opened, so that a product can be kept and cannot be demolded in the front mold under the condition that the front mold tunnel sliding block does not move in place, and the product quality is affected; in addition, the existing mold has special structures, and the front mold tunnel sliding block collision condition is generated because the control cannot be precisely performed.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art and provides a matched die ejection mechanism and a secondary parting die; the matched die ejection mechanism has simple structure and low manufacturing cost; the product ejection device is arranged in a die, so that the ejection difficulty or ejection deformation of the product can be avoided.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

In a first aspect, the utility model provides a matched die ejection mechanism, which comprises a first pull rod, a second pull rod, a base and a limit switch; the first pull rod is inserted into the base; the limit switch is arranged in the base, the tail end of the limit switch is elastically connected with the base, and the front end of the limit switch is contacted with the first pull rod; the second pull rod penetrates through the base and the limit switch;

When the first pull rod moves downwards relative to the limit switch until the longitudinal preset stroke is completed, the second drag hook arranged on the head of the second pull rod is in a clamping state with the limit switch; when the first pull rod moves downwards relative to the limit switch to finish a longitudinal preset stroke, the first pull hook arranged at the head of the first pull rod extrudes the limit switch to move rightwards relative to the base until the transverse preset stroke is finished, the second pull hook and the limit switch are in a non-clamping state, and the second pull rod moves upwards, so that the second pull hook can be separated from the limit switch and the base.

Further, the end face of the first drag hook is provided with a first chamfer, a first vertical face and a second chamfer which are sequentially connected from bottom to top; the front end face of the limit switch is correspondingly provided with a third chamfer, a second straight vertical face and a fourth chamfer which are sequentially connected from bottom to top.

Further, a first assembly hole is formed in the base; one end of the spring extends out through the first assembly hole to be in contact with the tail end of the limit switch, and the other end of the spring is abutted against the tail of the headless screw; the headless screw is screwed in the first assembly hole; the sum of the original length of the spring and the length of the headless screw connection part is larger than the length of the first assembly hole.

Further, the outer diameter of the spring is smaller than the inner diameter of the first assembly hole, so that the spring can freely stretch in the first assembly hole.

Further, the base comprises a limit groove, a first assembly groove and a second assembly groove; the first assembly groove and the second assembly groove are longitudinally communicated with the base and are respectively used for inserting the first pull rod and the second pull rod; the limit groove transversely penetrates through the first assembly groove and the second assembly groove, and the limit switch is arranged in the limit groove; the width of the first assembly groove is equal to that of the first draw hook; the width of the second assembly groove is equal to that of the second draw hook.

Furthermore, an avoidance groove is formed in the limit switch and used for enabling the second pull rod to pass through; the width of the avoidance groove is equal to that of the second assembly groove.

Further, the end face of the avoidance groove is provided with a third vertical face and a fifth inclined face which are connected from bottom to top; the end face of the second drag hook is correspondingly provided with a sixth chamfer surface and a fourth straight vertical surface which are connected from bottom to top.

Further, the tail parts of the first pull rod and the second pull rod respectively extend out of the first fixing block and the second fixing block correspondingly, so that the first pull rod and the second pull rod are L-shaped and are convenient to install on a corresponding die which is matched with the first pull rod and the second pull rod.

In a second aspect, the present utility model provides a secondary parting mold, including a primary ejector plate, a secondary ejector plate, and the mating mold ejector mechanism of any one of the first aspects; the base is fixed on the primary ejector plate; the first pull rod is fixed on the bottom plate below the primary ejector plate through a first fixed block; the second pull rod is fixed on the secondary ejector plate through a second fixing block;

When the ejector rod penetrates through the bottom plate and the primary top plate to push the secondary ejector plate to move in a longitudinal preset travel range, the second drag hook is clamped with the limit switch to drive the primary ejector plate to move upwards; when the ejector rod pushes the secondary ejector plate to exceed a longitudinal preset stroke, the first draw hook extrudes the limit switch to move until the transverse preset stroke is completed, the second draw hook is separated from the limit switch, and the primary ejector plate continues to move upwards under the thrust action of the ejector rod.

Further, threaded mounting holes are respectively formed in the bottom plate, the primary ejector plate and the secondary ejector plate; the first bolt penetrates through the base and is screwed into a threaded mounting hole on the primary ejector plate; the second bolt penetrates through the first fixed block and is screwed into the threaded mounting hole on the bottom plate; the third bolt penetrates through the second fixing block and is screwed into the threaded mounting hole on the secondary ejector plate.

Compared with the prior art, the utility model has the beneficial effects that:

The utility model provides a matched die ejection mechanism, which has simple integral structure and is convenient to manufacture and assemble; the second pull rod penetrates through the base and the limit switch, and a second draw hook and the limit switch arranged at the head of the second pull rod are in a clamping state under the elastic action; when the second pull rod is pulled upwards or the first pull rod is pulled downwards, the second draw hook and the limit switch are always in a clamping state as long as the first pull rod runs upwards or downwards within a longitudinal preset travel range; when the second pull rod is pulled upwards or the first pull rod is pulled downwards, the first pull rod exceeds the longitudinal preset travel range, the elastic connection point contracts under the action of the pressure of the first drag hook to enable the limit switch to move rightwards and rightwards, the second drag hook and the base form a non-clamping state, and the second drag hook is separated from the withdrawing base to move upwards. The matched die ejection mechanism is arranged on the die, and in the process of ejecting the product, the matched die ejection mechanism can solve the sequence of die opening and closing of the die plate according to the structural design of the matched die ejection mechanism, so that the die collision caused by the die opening sequence problem of the die or the incomplete die stripping caused by errors can be avoided.

The application is matched with a die ejection mechanism, so that the opening and closing sequence of the male die plate and the male die pad plate can be ensured, and the structural design of the die is simplified. In the mold with the secondary ejection structure, for example, the product cavity on the male mold side is too deep or the product is provided with an inclined ejection structure, and the backward space is limited. If the product ejection distance is smaller than the full ejection distance of the product, the product ejection mechanism is matched with the die ejection mechanism to ensure the safe ejection of the product of the die.

The utility model also provides a secondary parting mould, which is provided with a matched mould ejection mechanism, so that the quality and efficiency of demoulding of a secondary parting mould product can be improved, and the condition of collision or no falling of the mould is avoided.

Drawings

FIG. 1 is a schematic diagram of the installation of a mating mold ejection mechanism provided by the present utility model;

FIG. 2 is a schematic diagram of the operation of a mating mold ejection mechanism;

FIG. 3 is a schematic perspective view of the front face of a mating mold ejection mechanism;

Fig. 4 is a perspective view of the base;

FIG. 5 is a schematic perspective view of the back of a mating mold ejection mechanism;

FIG. 6 is a detailed structural schematic of the base, first tie rod and second tie rod;

FIG. 7 is an assembly schematic of a secondary parting mold equipped with a mating mold ejection mechanism;

In the figure: 1. a first pull rod; 2. a second pull rod; 3. a base; 4. a limit switch; 5. a primary ejector plate; 6. a secondary ejector plate; 7. a bottom plate; 8. a push rod; a. longitudinally presetting a stroke; b. transversely presetting a stroke;

11. A first drag hook; 12. a first fixed block; 13. a pin hole; 111. A first chamfer; 112. a first vertical face; 113. a second chamfer;

21. A second drag hook; 22. a second fixed block; 211. a sixth chamfer; 212. a fourth vertical face;

31. a first fitting hole; 32. a limit groove; 33. a first fitting groove; 34. a second fitting groove;

41. An avoidance groove; 42. a spring; 43. a headless screw; 44. a third chamfer; 45. a second vertical face; 46. a fourth chamfer 46; 411. a third vertical face; 412. a fifth chamfer;

51. A first bolt; 61. a third bolt; 71. and a second bolt.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

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 can be understood by those of ordinary skill in the art in a specific case.

Example 1

Referring to fig. 1 to 6, the present embodiment provides a matched mold ejection mechanism, which includes a first pull rod 1, a second pull rod 2, a base 3 and a limit switch 4. The first pull rod 1 is inserted on the base 3 in a penetrating way, the limit switch 4 is arranged inside the base 3, the tail of the limit switch 4 is connected with the base 3 through elasticity, and the front end of the limit switch is contacted with the first pull rod 1. A certain stroke length is set on the first pull rod 1 according to the requirement. Referring to fig. 2, when the first pull rod 1 moves downward relative to the limit switch 4 (pulls down the first pull rod 1 or moves up the base 3) so as to complete the longitudinal preset stroke a on the first pull rod 1, the first pull hook 11 provided at the head of the first pull rod 1 extrudes the limit switch 4, so that the limit switch 4 can move right relative to the base 3 to complete the transverse preset stroke b.

The second pull rod 2 longitudinally penetrates through the base 3 and the limit switch 4, and a second draw hook 21 is arranged at the head of the second pull rod 2. When the first pull rod 1 runs relative to the base 3 within the range of the longitudinal preset travel a, the second pull hook 21 and the limit switch 4 are in a clamping state, and the limit switch 4 is acted by the spring 42 to clamp the second pull hook 21, so that the second pull rod 2 is limited to be separated from the limit switch 4 to move upwards. Or an upward force is applied to the second pull rod 2, and the second pull rod 2 drives the limit switch 4 and the base 3 to move upwards together, so that the first pull rod 1 moves downwards relative to the base 3 within the range of a longitudinal preset stroke a. When the first pull rod 1 continues to move downwards relative to the base 3 until the base 3 moves rightwards to the transverse preset stroke b, the second draw hook 21 and the limit switch 4 are in a non-clamping state. The second pull rod 2 moves upwards by continuing to apply force, so that the second draw hook 21 is completely separated from the limit switch 4 and the base 3, and continues to move upwards.

Alternatively, as shown in fig. 6, the end surface of the first retractor 11 includes a first chamfer 111, a first upright surface 112, and a second chamfer 113. The first chamfer 111, the first vertical surface 112 and the second chamfer 113 are connected in sequence from bottom to top. The front end face of the limit switch 4 corresponding to the end face of the first draw hook 11 comprises a third chamfer surface 44, a second vertical surface 45 and a fourth chamfer surface 46. The third chamfer 44, the second straight vertical surface 45 and the fourth chamfer 46 are connected in sequence from bottom to top. When the first pull rod 1 moves downwards to complete the range of the longitudinal preset stroke a, the first chamfer surface 111 of the first pull hook 11 contacts with the fourth chamfer surface 46 of the limit switch 4 and runs relatively, then contacts with the second straight vertical surface 45 of the limit switch 4 through the first straight vertical surface 112 of the first pull hook 11 and runs relatively, and when the force is continuously applied, the first pull hook 11 is separated from the base 3. When the first pull rod 1 after being separated moves upwards relative to the base 3, first, the second chamfer 113 of the first pull hook 11 contacts with the third chamfer 44 of the limit switch 4 and moves upwards. After the first vertical surface 112 contacts the second vertical surface 45 and moves relatively (the compression limit switch 4 moves rightwards), the first draw hook 11 is blocked by the limit switch 4, and is restored to the state of being inserted into the base 3.

Optionally, the base 3 is provided with a first assembly hole 31. One end of the spring 42 extends into the first assembly hole 31 and then extends out, and contacts with the tail end of the limit switch 4 inserted in the inner side of the assembly hole, and the other end abuts against the tail of the headless screw 43 screwed in the first assembly hole 31. When the first draw hook 11 of the first pull rod 1 presses the limit switch 4, the spring 42 contracts a distance to limit the right-shift distance of the limit switch 4. The external diameter of the spring 42 is smaller than the internal diameter of the first assembly hole 31, so that the expansion and contraction of the spring 42 are prevented from being hindered by the inner wall of the first assembly hole 31, and the flexibility of opening and closing the limit switch 4 is prevented. The original length of the spring 42 is set to: when the headless screw 43 is screwed to the base 3, the spring 42 is not compressed, and one end thereof is in contact with the headless screw 43, and the other end thereof is protruded beyond the first fitting hole 31. That is, the sum of the original length of the spring 42 and the length of the screwed portion of the headless screw 43, which is the portion where the headless screw 43 is connected to the limit switch 4, is greater than the length of the first fitting hole 31.

Alternatively, as shown in fig. 4, the base 3 includes a limit groove 32, a first fitting groove 33, and a second fitting groove 34. The first assembly groove 33 and the second assembly groove 34 are longitudinally and penetratingly formed in the base 3, the first pull rod 1 is inserted into the first assembly groove 33, and the second pull rod 2 is inserted into the second assembly groove 34. The limiting groove 32 transversely penetrates the first fitting groove 33 and the second fitting groove 34. The width of the first fitting groove 33 is equal to the width of the first retractor 11, and the width of the second fitting groove 34 is equal to the width of the second retractor 21.

As shown in fig. 4, the limit switch 4 is provided with an avoidance groove 41, and the second pull rod 2 passes through the avoidance groove 41, so that the limit switch 4 limits the second drag hook 21 under the elastic action. The width of the escape groove 41 is set to be equal to the width of the second fitting groove 34. When the limit switch 4 is extruded by the first draw hook 11 to move right, the avoidance groove 41 and the second assembly groove 34 are aligned to be out of position, so that the second draw hook 21 can conveniently withdraw from the avoidance groove 41 and the second assembly groove 34. When the first draw hook 11 exits the first assembly groove 33 or the limit switch 4 contacts with the longitudinal preset travel a of the first draw rod 1, the limit switch 4 is offset to the left by the offset of the avoidance groove 41 under the action of the spring 42. Is not aligned with the notch of the second fitting groove 34, and restricts the second retractor 21 from being pulled upward.

Alternatively, as shown in fig. 6, the end surface of the relief groove 41 includes a third vertical surface 411 and a fifth chamfer surface 412. The third vertical face 411 and the fifth chamfer face 412 are connected from bottom to top. Correspondingly, the end face of the second draw hook 21 is correspondingly arranged. The end surface of the second retractor 21 includes a sixth chamfer 211 and a fourth straight elevation 212. The sixth chamfer 211 and the fourth straight elevation 212 are connected from bottom to top. When in operation, the working principle is consistent with that of the end faces of the first draw hook 11 and the limit switch 4, so that the second draw hook 21 can conveniently withdraw from or enter into the avoidance groove 41 relatively.

Optionally, the tail of the first pull rod 1 is provided with a first fixing block 12, and the tail of the second pull rod 2 is provided with a second fixing block 22. So that the first pull rod 1 and the second pull rod 2 are respectively L-shaped. The first pull rod 1 and the second pull rod 2 are conveniently installed into corresponding moulds for fixing in the later period.

Specifically, pin holes 13 are respectively formed in the first pull rod 1, the second pull rod 2 and the base 3, so that the later-stage pin matched pin holes 13 are conveniently mounted on a die, and quick positioning and mounting are performed.

Example two

The embodiment provides an assembling method of the ejection mechanism of the matched mould in the first embodiment, which comprises the following steps:

Step one: the limit switch 4 is arranged in the limit groove 32 in the base 3, the first pull rod 1 is arranged in the first assembly groove 33 of the base 3 in a penetrating way, the first pull hook 11 completely extends out of the base 3, the second pull rod 2 sequentially passes through the second assembly groove 34 and the limit groove 32, and the second pull hook 21 extends out of the avoiding groove 41.

Step two: the spring 42 is fed into the first fitting hole 31, one end of the spring 42 abuts against the limit switch 4, the other end is fed into the first fitting hole 31 by the headless screw 43, and the headless screw 43 is screwed into the first fitting hole 31.

Step three: and (3) finishing the installation of the matched die ejection mechanism, and sending the matched die ejection mechanism to a corresponding die for installation and use.

Example III

As shown in fig. 7, this embodiment provides a secondary parting mold, which includes a primary ejector plate 5, a secondary ejector plate 6, and any of the mating mold ejector mechanisms described in the first embodiment. The bottom plate 7 is arranged at the bottom of the primary ejector plate 5, and the secondary ejector plate 6 is arranged above the primary ejector plate 5. The ejector rod 8 penetrates through the bottom plate 7 and the primary ejector plate 5, is connected with the secondary ejector plate 6 and is used for ejecting the secondary ejector plate 6.

The pre-installed matched die ejection mechanism is installed on the secondary parting die. Wherein, base 3 is fixed on the first thimble board 5, and first pull rod 1 is last to be fixed on bottom plate 7 through first fixed block 12, and second pull rod 2 is fixed on the secondary thimble board 6 through second fixed block 22. When the ejector rod 8 pushes the secondary ejector plate 6 to move upwards, and the moving stroke does not exceed the range of the longitudinal preset stroke a, the second draw hook 21 and the limit switch 4 are in a clamping state, and the second draw hook 21 drives the base 3 and the primary ejector plate 5 to move upwards. When the ejector rod 8 pushes the upward movement stroke of the secondary ejector plate 6 to exceed the longitudinal preset stroke a, the first draw hook 11 extrudes the limit switch 4 to move until the transverse preset stroke b is completed (the notch of the avoidance groove 41 and the notch of the second assembly groove 34 are aligned), the second draw hook 21 is separated from the limit switch 4, and the primary ejector plate 5 continues to move upward under the thrust action of the ejector rod 8.

The primary thimble plate 5, the secondary thimble plate 6 and the bottom plate 7 can be reserved with positioning holes, so that each pin can conveniently penetrate through the pin holes on the base 3, the first pull rod 1 and the second pull rod 2 and the corresponding positioning holes thereof for positioning.

Specifically, screw thread mounting holes are respectively arranged on the bottom plate 7, the primary thimble plate 5 and the secondary thimble plate 6. The first bolt 51 is threaded through the base 3 into a threaded mounting hole in the primary ejector plate 5. The second bolt 71 penetrates through the first fixed block 12 and is screwed into a threaded mounting hole on the character bottom plate 7; the third bolt 61 penetrates through the second fixing block 22 and is screwed into a threaded mounting hole on the secondary thimble plate 6.

The length of the product, which is matched with the component by one-time demolding, can be preset by matching the mold ejection mechanism in the mold structure with the secondary ejection, and the longitudinal preset stroke a on the first pull rod 1 is correspondingly set according to the length. The purpose is that when the ejector rod 8 completes the longitudinal preset stroke a, the product is just demoulded once, so that the product is completely separated from the component. The product is secondarily demolded (ejected out of the secondary parting mould), and the ejector rod 8 continues to move upwards, so that the first draw hook 11 extrudes the limit switch 4 to move rightwards relative to the base 3 until the transverse preset stroke b is completed (the slot 41 is avoided and the slot opening of the second assembly slot 34 is aligned). At this time, the second retractor 21 is smoothly moved upward away from the base 3 without being restricted by the escape groove 41. And meanwhile, the ejector rod 8 smoothly ejects the product out of the secondary parting die. Avoid being difficult to eject, incompletely separated or ejected and deformed because of the product.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims (1)

1. The secondary parting die is characterized by comprising a primary ejector plate, a secondary ejector plate and a matched die ejection mechanism; the matched die ejection mechanism comprises a first pull rod, a second pull rod, a base and a limit switch; the first pull rod is inserted into the base; the limit switch is arranged in the base, the tail end of the limit switch is elastically connected with the base, and the front end of the limit switch is contacted with the first pull rod; the second pull rod penetrates through the base and the limit switch;

When the first pull rod moves downwards relative to the limit switch until the longitudinal preset stroke is completed, the second drag hook arranged on the head of the second pull rod is in a clamping state with the limit switch; when the first pull rod moves downwards relative to the limit switch to finish a longitudinal preset stroke, the first pull hook arranged at the head of the first pull rod extrudes the limit switch to move rightwards relative to the base until the transverse preset stroke is finished, the second pull hook and the limit switch are in a non-clamping state, and the second pull rod moves upwards, so that the second pull hook can be separated from the limit switch and the base; the tail parts of the first pull rod and the second pull rod respectively extend out of the first fixing block and the second fixing block correspondingly, so that the first pull rod and the second pull rod are L-shaped;

The base is fixed on the primary ejector plate; the first pull rod is fixed on the bottom plate below the primary ejector plate through a first fixed block; the second pull rod is fixed on the secondary ejector plate through a second fixing block; when the ejector rod penetrates through the bottom plate and the primary top plate to push the secondary ejector plate to move in a longitudinal preset travel range, the second drag hook is clamped with the limit switch to drive the primary ejector plate to move upwards; when the ejector rod pushes the secondary ejector plate to exceed a longitudinal preset stroke, the first draw hook extrudes the limit switch to move until the transverse preset stroke is completed, the second draw hook is separated from the limit switch, and the primary ejector plate continues to move upwards under the thrust action of the ejector rod;

Screw thread mounting holes are respectively formed in the bottom plate, the primary ejector plate and the secondary ejector plate; the first bolt penetrates through the base and is screwed into a threaded mounting hole on the primary ejector plate; the second bolt penetrates through the first fixed block and is screwed into the threaded mounting hole on the bottom plate; the third bolt penetrates through the second fixing block and is screwed into the threaded mounting hole on the secondary ejector plate.