Reset resistance-free secondary ejection mechanism

Abstract

The reset resistance-free secondary ejection mechanism comprises a rear fixing plate, an ejector pin plate, a secondary ejection plate, an ejector rod, a swing rod fixing block, a positioning elastic piece, a buckling block, a clamping block, an insertion rod binding block, a swing rod, a shifting block, an insertion rod and a connecting piece. The side face of one end of the swing rod is provided with a protrusion, the other end of the swing rod is connected with the ejector plate through a swing rod fixing block, the opposite faces of the end with the protrusion are each provided with an inclined face, one inclined face is located on the side with the protrusion, the face, opposite to the inclined face, of the protrusion is provided with a buckle, and the buckle can be clamped with a clamping groove in the clamping block. During ejection, the shifting block can insert the swing rod to be separated from the clamping block, secondary ejection is continued, the swing rod can be bounced off by the positioning elastic piece, and the secondary ejection plate can be directly reset after ejection is completed. According to the invention, the secondary ejection plate is directly reset through the reset resistance-free secondary ejection mechanism, so that the resistance generated during elastic clamping reset in the conventional mechanism is eliminated, and the problem of incomplete reset of the secondary ejection plate caused by the resistance is solved.

Description

[Technical field]

[0001] The invention relates to the technical field of molds, in particular to a reset resistance-free secondary ejection mechanism. [Background technology]

[0002] In plastic molds, secondary ejection is often set up to facilitate product removal because of the existence of products such as straight ejectors with ribs inside or flat ejectors that clamp products. During the secondary ejection process, the ejector plate and the secondary ejector plate participate in the ejection together during the first ejection, and only the secondary ejector plate participates in the ejection during the second ejection. Therefore, the common secondary ejection mechanism needs to engage the secondary ejector plate and the ejector plate when the secondary ejector plate is reset. At present, the engagement of the secondary ejector plate in the secondary ejection mechanism mainly relies on the elastic force of the elastic part. However, when the elastic force of the elastic part is relatively small, the secondary ejector plate cannot be engaged in place; when the elastic force of the elastic part is relatively large, there will be resistance when the secondary ejector plate is reset, and the elastic part will push back the engagement structure, resulting in the secondary ejector plate being unable to reset to the bottom. In view of this, it is necessary to provide a secondary ejection mechanism with no resistance to reset to solve the above problems. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is that the secondary ejector plate on the current secondary ejector mechanism is reset by the elastic force of the elastic member, and the locking effect cannot be achieved when the elastic force is small. However, when the elastic force is large, there will be resistance when the secondary ejector plate is reset, and the elastic force reacts on the locking structure, resulting in the secondary ejector plate being unable to be completely reset.

[0004] The present invention solves the technical problem by providing a reset-free resistance secondary ejection mechanism, which includes a rear fixed plate, an ejector plate, a secondary ejector plate, an ejector rod, a rocker rod fixing block, a positioning elastic member, a buckle block, a clamping block, an insert rod bundle block, a rocker rod, a shifting block, an insert rod, and a connecting member. The rocker rod is inserted by the insert rod and the shifting block, and the secondary ejection plate can be connected to or disconnected from the ejector plate through the rocker rod, and the rocker rod will not hinder the reset of the secondary ejection plate when the secondary ejection is completed.

[0005] A rear fixing plate, wherein one side of the rear fixing plate faces the lower ejector plate, and the other side faces away from the ejector plate.

[0006] The ejector plate comprises an upper ejector plate and a lower ejector plate, the upper ejector plate can be between the lower ejector plate and the secondary ejector plate, the lower ejector plate is between the rear fixing plate and the upper ejector plate, and the two ejector plates are fixed together.

[0007] The secondary ejector plate comprises a secondary upper ejector plate and a secondary lower ejector plate, the secondary lower ejector plate is between the secondary upper ejector plate and the ejector pin plate, the secondary upper ejector plate is between the secondary lower ejector plate and the male mold plate, and the two secondary ejector plates are fixed together.

[0008] The ejector rod is fixed on the rear fixed plate, and the action surface in the ejection direction contacts the secondary ejection plate, and the ejection effect directly acts on the secondary ejection plate.

[0009] A rocker rod fixing block is fixed on one side of the lower ejector plate. A groove is provided on the surface of the rocker rod fixing block facing the movement direction of the insertion rod. The groove can accommodate the insertion of one end of the rocker rod with a hole. The rocker rod fixing block connects the rocker rod and the lower ejector plate and determines the position of the rocker rod when it is in an open state.

[0010] A positioning elastic member, one end of which is fixed to one side of the upper ejector plate, the positioning elastic member and the swing rod fixing block are fixed on the same side, one end of which contacts the swing rod and exerts a force on the swing rod away from the ejector plate.

[0011] A buckle block is fixed on one side between two secondary ejection plates, and the buckle block and the swing arm fixing block are fixed on the same side; a block groove is opened on the surface of the buckle block close to the secondary ejection plate, and the block groove is used to place the block and limit the rotation range of the block.

[0012] A card block is arranged in a card block slot of the buckle block. A card slot and an elastic member matching the buckle on the swing rod are arranged on the surface of the card block close to the secondary ejection plate. The card slot is located at one end of the card block close to the swing rod; the elastic member is fixed at the other end; a hole is arranged on the side surface adjacent to the surface with the card slot and the elastic member, and the hole is equidistant from the two ends of the card block. The connecting member passes through the hole to connect the card block and the buckle block.

[0013] An insert rod bundle block is fixed on one side of the secondary ejector plate, and the insert rod bundle block and the swing rod fixing block are fixed on the same side; a guide groove is opened on the connecting end surface of the insert rod bundle block and the secondary ejector plate along the movement direction of the insert rod, one end of the swing rod provided with a buckle is in the guide groove, and the side with the buckle faces the clamping block; when the mold is closed, the insert rod is inserted into the guide groove, and the swing rod is constrained by the guide groove.

[0014] A rocker arm, wherein a protrusion is provided on the side surface of one end of the rocker arm, and an inclined surface is respectively provided on the opposite surface of the end with the protrusion, one of the inclined surfaces is on the side with the protrusion, and a buckle is provided on the surface of the protrusion opposite to the inclined surface, and the buckle can be engaged with the slot on the card block; a hole is provided on the side surface of the other end, and the side surface where the protrusion is located and the side surface where the hole is located are adjacent surfaces, and a connecting piece can pass through the hole to connect the rocker arm and the rocker arm fixing block.

[0015] A shift block, one end of which is fixed on one side of the male template, and the shift block and the swing rod fixing block are on the same side; the other end is provided with an inclined surface on the side away from the ejector plate, and the inclination degree of the inclined surface is the same as that of the inclined surface on the side of the swing rod containing the raised part.

[0016] An insert rod, one end of which is fixed on one side of the mother template, and the insert rod and the swing rod fixing block are on the same side; the other end is provided with an inclined surface on the side facing the ejector plate, and the inclination degree of the inclined surface is the same as the inclined surface on the opposite side of the raised part on the swing rod.

[0017] Preferably, the positioning elastic member may be composed of an elastic pin and a spring, wherein the elastic pin passes through both ends of the spring, one end of the elastic pin is connected to one side of the ejector plate, and the other end of the elastic pin supports the swing rod.

[0018] Preferably, the elastic member may be a spring.

[0019] Preferably, the buckle block can be fixed by a pin.

[0020] Preferably, the connecting member may be a rotating shaft.

[0021] The beneficial effects of the present invention are as follows: currently, the reset of the secondary ejector plate in the secondary ejection mechanism mostly relies on the elastic force of the elastic part to press together, but if the elastic force of the elastic part is too small, the mechanism cannot be engaged, and if the elastic force of the elastic part is too large, it will hinder the reset of the secondary ejector plate, resulting in the inability of the secondary ejector plate to be completely reset. The reset-resistance-free secondary ejection mechanism of the present invention inserts the rocker arm through the insertion rod when the mold is closed, and the rocker arm can be stuck in the slot on the card block to connect the secondary ejector plate and the ejector plate; although the insertion rod is removed when the mold is opened, the rocker arm can continue to connect the secondary ejector plate and the ejector plate due to the force of the buckle; during the ejection process, the shift block will insert the rocker arm, and finally the rocker arm and the card block will be separated, and at this time the secondary ejector plate will also be separated from the ejector plate; the ejector rod can continue to eject the secondary ejector plate until the secondary ejection is completed; at this time, the rocker arm is in an open state under the elastic force of the positioning elastic part, and at this time the secondary ejector plate can be directly reset, and there is no resistance to reset.

Brief Description of the Drawings

[0022] Figure 1 It is a structural schematic diagram of the assembly when the clamping block is installed on the buckle block.

[0023] Figure 2 It is a structural diagram of the resistance-free secondary ejection mechanism before mold closing.

[0024] Figure 3 It is a structural diagram of the resistance-free secondary ejection mechanism when mold closing is completed.

[0025] Figure 4 It is a structural schematic diagram of a secondary ejection mechanism in which the ejection block is ejected for a certain distance and the rocker rod is inserted to reset without resistance.

[0026] Figure 5 It is a structural schematic diagram of the secondary ejection mechanism that resets without resistance when the secondary ejection is completed.

[0027] Figure 6 It is a schematic diagram of the structure of the rocker arm and the clamping block during the mold closing process. [Specific implementation method]

[0028] In order to further illustrate the technical means and effects adopted by the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings.

[0029] The present invention provides a reset resistance-free secondary ejection mechanism, comprising: a rear fixing plate 20, an ejector plate 21, a secondary ejection plate 22, an ejector rod 23, a swing rod fixing block 24, a positioning elastic member 25, a buckle block 26, a clamping block 27, an insertion rod bundle block 28, a swing rod 29, a shifting block 12, an insertion rod 11, and connecting members 200 and 201. The swing rod 29 is inserted by the insertion rod 11 and the shifting block 12, so that the secondary ejection plate 22 can be connected to or disconnected from the ejector plate 21 through the swing rod 29, and the swing rod 29 will not hinder the reset of the secondary ejection plate 22 when the secondary ejection is completed.

[0030] The rear fixing plate 20 has one side facing the lower ejector plate 212 and the other side facing away from the ejector plate 21 .

[0031] The ejector plate 21 includes an upper ejector plate 211 and a lower ejector plate 212. The upper ejector plate 211 is between the secondary ejector plate 22 and the lower ejector plate 212. The lower ejector plate 212 is between the upper ejector plate 211 and the rear fixing plate 20. The two ejector plates 211 and 212 are fixed together.

[0032] The secondary ejector plate 22 includes a secondary ejector upper ejector plate 221 and a secondary ejector lower ejector plate 222. The secondary ejector lower ejector plate 222 is between the ejector plate 21 and the secondary ejector upper ejector plate 211. The secondary ejector upper ejector plate 221 is between the secondary ejector lower ejector plate 212 and the male mold plate. The two secondary ejector plates 221 and 222 are fixed together.

[0033] The ejector rod 23 is fixed on the rear fixed plate 20 , and its action surface in the ejection direction contacts the secondary ejection plate 22 , so that the ejection effect directly acts on the two secondary ejection plates 221 , 222 .

[0034] The rocker bar fixing block 24 is fixed on one side of the lower ejector plate 212. A groove 241 is provided on the surface of the rocker bar fixing block 24 facing the movement direction of the insertion rod 11. The groove 241 can accommodate the insertion of one end of the rocker bar 29 with the hole 294. The rocker bar fixing block 24 connects the rocker bar 29 and the lower ejector plate 212, and determines the position of the rocker bar 29 when it is in the open state.

[0035] The positioning elastic member 25 has one end fixed to one side of the upper ejector plate 211 , and the positioning elastic member 25 and the swing rod fixing block 24 are fixed on the same side, and one end contacts the swing rod 29 , and exerts a force on the swing rod 29 away from the ejector plate 21 .

[0036] The buckle block 26 is fixed on one side between the two secondary ejection plates 221 and 222, and the buckle block 26 and the swing arm fixing block 24 are fixed on the same side; a block groove 267 is formed on the contact surface between the buckle block 26 and the secondary ejection plate 221, and the block groove 267 is used to place the block 27 and limit the rotation range of the block 27.

[0037] The card block 27 is arranged in the buckle block card block groove 267. A card slot 271 and an elastic member 272 matching the buckle 291 on the swing rod 29 are provided on the surface of the card block 27 close to the secondary ejection plate 221. The card slot 271 is located at one end of the card block 27 close to the swing rod 29; the elastic member 272 is close to the other end; a hole 273 is provided on the side surface adjacent to the surface provided with the card slot 271 and the elastic member 272, and the hole 273 is equidistant from the two ends of the card block 27. The connecting member 200 can pass through the hole 273 to connect the card block 27 and the buckle block 26.

[0038] The insert rod bundle block 28 is fixed on one side of the secondary top ejection plate 221, and the insert rod bundle block 28 and the rocker arm fixing block 24 are fixed on the same side; a guide groove 281 is opened on the connecting end surface of the insert rod bundle block 28 and the secondary top ejection plate 221 along the movement direction of the insert rod 11, and one end of the rocker arm 29 provided with a buckle 291 is in the guide groove 281, and the side with the buckle 291 faces the block 27; when the mold is closed, the insert rod 11 can be inserted into the guide groove 281 and the rocker arm 29 can be inserted under the constraint of the guide groove 281.

[0039] The swing rod 29 has a protrusion on the side surface of one end of the swing rod 29, and a slope 292 is respectively provided on the opposite surface of the end with the protrusion, one of the slopes 293 is on the side with the protrusion, and a buckle 291 is provided on the surface of the protrusion opposite to the slope 282, and the buckle 291 can be engaged with the groove 271 on the block 27; there is a hole 294 on the side surface of the other end, the side surface 292 where the protrusion is located and the side surface where the hole 294 is located are adjacent surfaces, and the connecting piece 201 can pass through the hole 294 to connect the swing rod 29 and the swing rod fixing block 24.

[0040] The shift block 12 has one end fixed to one side of the male template, and the shift block 12 and the swing rod 29 fixing block are on the same side; the other end is provided with an inclined surface 111 on the side away from the ejector plate 21, and the inclination degree of the inclined surface 111 is the same as the inclined surface 293 on the side of the protruding portion on the swing rod 29.

[0041] The insert rod 11 has one end fixed to one side of the mother template, and the insert rod 11 is on the same side as the rocker arm fixing block 24; the other end is provided with a slope 121 on the side facing the ejector plate 21, and the inclination degree of the slope 121 is the same as that of the slope 293 on the opposite side of the raised part of the rocker arm 29.

[0042] The positioning elastic member 25 may be composed of an elastic pin and a spring. The elastic pin passes through two ends of the spring, one end of which is connected to one side of the ejector plate 21 and the other end of which supports the swing rod 29 .

[0043] The elastic member 272 may be a spring.

[0044] The buckle block 26 can be fixed by pins.

[0045] Wherein, the connecting members 200 and 201 may be rotating shafts.

[0046] The working process of the present invention is as follows: before mold closing, the positioning elastic member 25 exerts an elastic force on the rocker arm 29 in the direction away from the clamping block 27, and the rocker arm 29 is tilted in this direction by the elastic force, and the rocker arm 29 is in an open state at this time; during mold closing, the insertion rod 11 fixed on one side of the mother template is inserted into the insertion rod bundle block 28, and the rocker arm 29 is inserted along the guide groove 281 on the insertion rod bundle block 28; the buckle 291 on the rocker arm 29 gradually enters the clamping groove 271 on the clamping block 27, and the clamping block 27 rotates around the rotating shaft 200 at this time, and the spring 272 fixed on the other end of the clamping block 27 is compressed due to the position change of the rotation of the clamping block 27. When the mold is closed, the buckle 291 on the rocker arm 29 completely enters the slot 271. Since the buckle 291 is located farther from the rotating shaft 201 connected to the rocker arm 29 and has a larger lever arm, the force of the buckle 291 engaging the rocker arm 29 will be much greater than the force of the positioning elastic member 25 to bounce the rocker arm 29 open. At this time, the rocker arm 29 can be connected to the ejector plate 21 and the secondary ejector plate 22. At this time, even if the insertion rod 11 is detached, the buckle 291 can still clamp the rocker arm 29.

[0047] During ejection, although the ejector rod 23 only acts on the secondary ejection plate 22, the rocker rod 29 connects the secondary ejection plate 22 and the ejector plate 21, and the ejector plate 21 is also ejected. When the ejection proceeds to the point where the shift block 12 inserts the rocker rod 29, as the ejection proceeds, the buckle 291 on the rocker rod 29 will disengage from the slot 271 on the clamping block 27. At this time, the ejector plate 21 is separated from the secondary ejection plate 22, and the secondary ejection plate 22 can continue to be ejected under the action of the ejector rod 23; at the same time, the rocker rod 29 is opened by the elastic force of the positioning elastic member 25 and returns to the open state before mold closing. When the secondary ejection is completed, the rocker rod 29 is still in the open state, and the secondary ejection plate 22 can be directly reset, and there is no resistance during the reset.

[0048] The beneficial effects of the present invention are as follows: the common secondary ejection mechanism uses the elastic force of the spring to press the secondary ejection plate 22 when it is reset. When the spring elastic force is small, the secondary ejection plate 22 cannot be engaged; when the spring elastic force is large, the secondary ejection plate 22 has resistance when it is reset and cannot be reset to the bottom. The resistance-free reset secondary ejection mechanism of the present invention inserts the rocker 29 through the insertion rod 11 fixed on the mother mold when the mold is closed, and the buckle 291 on the rocker 29 clamps the card slot 271 on the card block 27. At this time, the rocker 29 connects the secondary ejection plate 22 and the ejector plate 21, and the ejector plate 21 can be ejected together with the secondary ejection plate 22. When the ejection proceeds to the point where the shift block 12 inserts the swing rod 29, the buckle 291 on the swing rod 29 is disengaged from the slot 271 under the insertion of the shift block 12; at this time, the secondary ejection plate 22 is separated from the ejector plate 21, and the secondary ejection plate 22 continues to be ejected under the action of the ejector rod 23, and the swing rod 29 is tilted away from the ejector plate 21 by the positioning elastic member 25 and maintains this open state. When the secondary ejection is completed, since the swing rod 29 is in the open state at this time, the secondary ejection plate 22 can be directly reset without any resistance.

[0049] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A reset resistance-free secondary ejection mechanism, characterized in that: include: Ejector plate, secondary ejector plate, ejector rod, positioning elastic part, buckle block, card block, plug rod bundle block, swing rod, shift block, plug rod; An ejector plate, wherein one side of the ejector plate faces the secondary ejector plate and the other side faces away from the secondary ejector plate; A secondary ejector plate, the secondary ejector plate being arranged between the ejector plate and the male plate; An ejector rod, wherein the action surface of the ejector rod in the ejection direction contacts the secondary ejector plate, and the ejection effect directly acts on the two secondary ejector plates; A positioning elastic member, one end of which is fixed to one side of the ejector plate, and one end of which is in contact with the swing rod and exerts a force on the swing rod in a direction away from the ejector plate; A buckle block is fixed at the middle position of one side of the secondary ejection plate, and the buckle block and the positioning elastic member are fixed on the same side; a clamping block groove is opened on the surface of the buckle block facing the movement direction of the insertion rod, and the clamping block groove is used to place the clamping block and limit the rotation range of the clamping block; The card block is arranged in the card block slot of the buckle block, and a card slot and an elastic member matching the buckle on the swing rod are arranged on the card block facing the moving direction of the insertion rod, the card slot is located at one end of the card block close to the swing rod; the elastic member is close to the other end; a hole is arranged on the side surface adjacent to the surface with the card slot and the elastic member, the hole is equidistant from the two ends of the card block, and a connecting member passes through the hole to connect the card block and the buckle block; The plug rod bundle block is fixed on one side of the secondary ejection plate, and the plug rod bundle block and the positioning elastic member are fixed on the same side; a guide groove is provided on the end surface connecting the plug rod bundle block and the secondary ejection plate along the moving direction of the plug rod, one end of the swing rod provided with a buckle is in the guide groove, and the side provided with the buckle faces the block, and the plug rod is inserted into the guide groove when the mold is closed, and the swing rod is constrained by the guide groove to be inserted; A swing rod, wherein a convexity is provided on one end of the swing rod, and an inclined surface is respectively provided on the opposite surface of the end with the convexity, wherein one inclined surface is on the side with the convexity, and a buckle is provided on the surface of the convexity opposite to the inclined surface, and the buckle can be engaged with the slot on the clamping block, and the other end can be connected to one side of the ejector plate, and the side where the swing rod is located is the same side as the positioning elastic member; A shift block, one end of which is fixed to one side of the male template, and the shift block and the positioning elastic member are on the same side; the other end of which is away from the ejector plate and is provided with an inclined surface, and the inclination of the inclined surface is the same as that of the inclined surface on the side of the convex part of the swing rod; An insert rod, one end of which is fixed on one side of the mother template, and the insert rod and the positioning elastic member are on the same side; the other end is provided with an inclined surface on the side facing the ejector plate, and the inclination degree of the inclined surface is the same as that of the inclined surface on the opposite side of the raised part on the swing rod.

2. The positioning elastic member according to claim 1, characterized in that: The positioning elastic member may be composed of a spring and an elastic pin. The elastic pin passes through both ends of the spring, one end of which is connected to one side of the ejector plate and the other end of which supports the swing rod.

3. The elastic member according to claim 1, characterized in that: The elastic member may be a spring.

4. The buckle block according to claim 1, characterized in that: The buckle block can be fixed by a pin.

5. The connector according to claim 1, characterized in that: The connecting member may be a rotating shaft.

6. The ejector plate according to claim 1, characterized in that: The ejector plate may include an upper ejector plate and a lower ejector plate, the upper and lower ejector plates are fixed together, the upper ejector plate is arranged between the secondary ejector plate and the lower ejector plate, and the lower ejector plate is arranged between the upper ejector plate and the rear fixing plate.

7. The secondary ejector plate according to claim 1, characterized in that: The secondary ejector plate comprises a secondary upper ejector plate and a secondary lower ejector plate. The two ejector plates are fixed together. The secondary upper ejector plate is between the secondary lower ejector plate and the male mold plate, and the secondary lower ejector plate is between the secondary upper ejector plate and the upper ejector plate.

8. The swing rod according to claim 1, characterized in that: The swing rod is connected with the lower ejector plate through a swing rod fixing block.

9. The positioning elastic member according to claim 2, characterized in that: One end of the positioning elastic member is fixed to one side of the upper ejector plate.

10. The buckle block according to claim 4, characterized in that: The buckle block can be fixed on one side between the secondary upper ejection plate and the secondary lower ejection plate with the surface with the slot facing the secondary upper ejection plate, and the side is the same side as the fixing side of the positioning elastic member.

11. The push rod according to claim 1, characterized in that: The ejector rod is fixed on the rear fixing plate, one side of the rear fixing plate faces the ejector plate, and the other side faces away from the ejector plate and the secondary ejector plate.

12. The plunger cluster block according to claim 1, characterized in that: The rod insertion bundle block is fixed on one side of the ejection plate on the secondary ejector.

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