CN214982923U

CN214982923U - Mould with secondary ejection structure

Info

Publication number: CN214982923U
Application number: CN202120603491.4U
Authority: CN
Inventors: 陈炎; 苏朋龙; 肖松林
Original assignee: Dongguan Dongxin Mould Co ltd
Current assignee: Dongguan Dongxin Mould Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-03
Anticipated expiration: 2031-03-25

Abstract

The utility model relates to the technical field of dies, in particular to a die with a secondary ejection structure, which comprises an upper die component, a lower die component and an ejection mechanism, wherein the ejection mechanism comprises a top plate, a primary ejector rod component and a secondary ejector rod component, the top plate is arranged below the lower die component, the primary ejector rod component is provided with a plurality of primary ejector rods, the lower end of the primary ejector rod is positioned and installed on the top plate, and the upper end of the primary ejector rod penetrates through the lower die component and movably penetrates through a lower die cavity; the secondary ejector rod assembly comprises a secondary ejector rod and a pushing mechanism, the pushing mechanism is arranged on the top plate, the upper end of the secondary ejector rod penetrates through the lower die assembly and movably penetrates through the cavity of the lower die, and the lower end of the secondary ejector rod is in power fit with the pushing mechanism; the ejection speed of the product can be accelerated, the production efficiency is improved, the yield of defective products is reduced, the product is easy to take down, and the automatic production is easy to realize.

Description

Mould with secondary ejection structure

Technical Field

The utility model relates to the technical field of mold, specifically be a mold with ejecting structure of secondary.

Background

The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate sizes; injection molding is a processing method used for mass production of parts with complex shapes; injecting the heated and melted plastic into a mold cavity at high pressure by an injection molding machine, and cooling and solidifying to obtain a formed product;

at present, through mould shaping plastic product after, need ejecting with the plastic product, prior art generally adopts once ejecting mode, to the thin plastic product of preparation thickness, in order to realize the ejecting with the product is stable, need design a plurality of bone positions, and ejecting back, the dark easy die bonding of bone position leads to the product to be difficult to take out, can give people and bring following problem: the production efficiency is low, the defective products are high, the automatic production of the products is difficult to realize, the production quality is stable and poor, and great production cost loss is caused; therefore, a technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

In order to achieve the above object, the utility model provides a following technical scheme: a mould with a secondary ejection structure comprises an upper mould component, a lower mould component and an ejection mechanism, wherein an upper mould cavity is arranged on the upper mould component, a lower mould cavity is arranged on the lower mould component, a sliding limiting rod is arranged between the upper mould component and the lower mould component, and the upper mould component and the lower mould component are in sliding fit through the sliding limiting rod, so that the upper mould cavity and the lower mould cavity complete mould closing and mould opening operations;

the ejection mechanism comprises a top plate, a primary ejector rod assembly and a secondary ejector rod assembly, the top plate is arranged below the lower die assembly, the primary ejector rod assembly is provided with a plurality of primary ejector rods, the lower ends of the primary ejector rods are positioned and mounted on the top plate, and the upper ends of the primary ejector rods penetrate through the lower die assembly and are movably arranged in the lower die cavity in a penetrating manner; the secondary ejector rod assembly comprises a secondary ejector rod and a pushing mechanism, the pushing mechanism is arranged on the top plate, the upper end of the secondary ejector rod penetrates through the lower die assembly and is movably arranged in the lower die cavity in a penetrating mode, and the lower end of the secondary ejector rod is in power fit with the pushing mechanism.

Preferably, the pushing mechanism comprises a seesaw member, a shaft pin, a short rod and a return spring, a containing cavity is arranged in the top plate, the shaft pin is arranged in the containing cavity, the middle part of the seesaw member rotates around the shaft pin, a first connecting hole and a second connecting hole are respectively arranged on the top plate in a penetrating way corresponding to positions above two ends of the seesaw member, the short rod is vertically arranged, the lower end of the short rod slides and stretches along the first connecting hole, and the lower end of the short rod abuts against one end of the seesaw member; the lower end of the secondary ejection rod slides and stretches along the second connecting hole, and abuts against the other end of the warping plate; reset spring sets up in the second connecting hole, and reset spring and secondary knock-out lever elastic fit.

Preferably, the number of the secondary ejector rod assemblies is four, and the four secondary ejector rod assemblies respectively correspond to the four corners of the lower die cavity.

Preferably, the lower end of the first connecting hole is provided with a limiting groove, the lower end of the short rod is provided with a limiting part, and the limiting groove is in blocking fit with the limiting part; the position of the containing cavity corresponding to the lower part of the short rod is provided with an expansion part for the limiting part to extend into.

Preferably, the upper end of the second connecting hole is provided with a spring stop ring, the lower end of the secondary ejection rod is provided with a spring stop part, the return spring is sleeved on the secondary ejection rod, and the return spring is limited between the spring stop ring and the spring stop part; the spring blocking part is in blocking fit with the opening of the accommodating cavity.

Preferably, the middle part of the seesaw member is provided with a shaft hole, the seesaw member rotates around the shaft pin through the shaft hole, and the positions from the middle part to the two ends of the seesaw member are respectively provided with a concave part; the lower part of the tilting plate is provided with a supporting part which is close to the lower position of the secondary ejection rod.

Preferably, the upper end of the top plate is provided with a limiting column, and the upper end of the limiting column is lower than the upper end of the short rod; the top plate is in limit fit with the lower die assembly through the limit columns.

Preferably, the roof is including ejector pin panel and ejector pin bottom plate, and first connecting hole and second connecting hole set up on the ejector pin panel, hold the chamber setting on the ejector pin bottom plate.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the ejection mechanism comprises a top plate, a primary ejector rod assembly and a secondary ejector rod assembly, the top plate is operated in the mold opening process, the top plate is enabled to ascend, a primary ejection rod and a secondary ejection rod are pushed to ascend together, a product is ejected, after the product is ejected to a certain height, the pushing mechanism operates, the secondary ejection rod continues to ascend, and therefore the product is driven to continue to operate upwards, and the product is automatically separated from the primary ejection rod; through the design, the ejection speed of the product can be accelerated, the production efficiency is improved, the yield of defective products is reduced, the product is easy to take down, and the automatic production is easy to realize.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the upper mold cavity, the lower mold cavity and the ejection mechanism of the present invention;

fig. 3 is a schematic structural view of fig. 2 without the top bar panel, the limiting post and the primary top bar assembly;

FIG. 4 is a schematic structural view of the connection position between the pushing mechanism and the bottom plate of the ejector rod of the present invention;

fig. 5 is a schematic cross-sectional structure diagram of the connection position between the pushing mechanism and the top plate of the present invention.

The reference numerals and names in the figures are as follows:

the upper die assembly 10, the lower die assembly 20, the ejection mechanism 30, the upper die cavity 11, the sliding limit rod 12, the lower die cavity 21, the top plate 31, the secondary ejector rod assembly 33, the limit column 34, the ejector rod panel 35, the ejector rod bottom plate 36, the accommodating cavity 311, the first connecting hole 312, the second connecting hole 313, the limit groove 314, the spring stop ring 315, the expanding part 316, the limit part 317, the spring stop part 318, the primary ejector rod 321, the secondary ejector rod 331, the pushing mechanism 332, the rocker piece 333, the shaft pin 334, the short rod 335, the return spring 336, the shaft hole 337, the recessed part 338 and the supporting part 339.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, in an embodiment of the present invention, a mold with a secondary ejection structure includes an upper mold assembly 10, a lower mold assembly 20 and an ejection mechanism 30, wherein the upper mold assembly 10 is provided with an upper mold cavity 11, the lower mold assembly 20 is provided with a lower mold cavity 21, a sliding limiting rod 12 is provided between the upper mold assembly 10 and the lower mold assembly 20, and the upper mold assembly 10 and the lower mold assembly 20 are in sliding fit through the sliding limiting rod 12, so that the upper mold cavity 11 and the lower mold cavity 21 complete mold closing and opening operations;

the ejection mechanism 30 comprises a top plate 31, a primary ejector rod assembly and a secondary ejector rod assembly 33, wherein the top plate 31 is arranged below the lower die assembly 20, the primary ejector rod assembly is provided with a plurality of primary ejector rods 321, the lower ends of the primary ejector rods 321 are positioned and installed on the top plate 31, and the upper ends of the primary ejector rods 321 penetrate through the lower die assembly 20 and movably penetrate through the lower die cavity 21; the secondary ejector rod assembly 33 comprises a secondary ejector rod 331 and a pushing mechanism 332, the pushing mechanism 332 is disposed on the top plate 31, the upper end of the secondary ejector rod 331 penetrates through the lower die assembly 20 and movably penetrates through the lower die cavity 21, and the lower end of the secondary ejector rod 331 is in power fit with the pushing mechanism 332.

In the above embodiment, the ejection mechanism 30 is provided to include the top plate 31, the primary ejector rod assembly and the secondary ejector rod assembly 33, during the mold opening process, the top plate 31 is operated to lift the top plate 31, the primary ejector rod 321 and the secondary ejector rod 331 are pushed to lift together to eject the product, after the product is ejected to a certain height, the pushing mechanism 332 is operated, the secondary ejector rod 331 continues to lift, so as to drive the product to continue to move upwards, and the product is automatically separated from the primary ejector rod 321; through the design, the ejection speed of the product can be accelerated, the production efficiency is improved, the yield of defective products is reduced, the product is easy to take down, and the automatic production is easy to realize.

As further shown in fig. 4-5, the pushing mechanism 332 includes a tilting plate member 333, a shaft pin 334, a short rod 335 and a return spring 336, wherein an accommodating cavity 311 is provided in the top plate 31, the shaft pin 334 is provided in the accommodating cavity 311, the middle part of the tilting plate member 333 rotates around the shaft pin 334, a first connecting hole 312 and a second connecting hole 313 are respectively provided through the top plate 31 corresponding to positions above two ends of the tilting plate member 333, the short rod 335 is vertically provided, the lower end of the short rod 335 slides and extends along the first connecting hole 312, and the lower end of the short rod 335 abuts against one end of the tilting plate member 333; the lower end of the secondary ejection rod 331 slides and extends along the second connection hole 313, and the lower end of the secondary ejection rod 331 abuts against the other end of the warping plate 333; a return spring 336 is disposed in the second coupling hole 313, and the return spring 336 is elastically engaged with the secondary eject lever 331.

In the above embodiment, by designing the seesaw member 333, the shaft pin 334, the short bar 335 and the return spring 336, according to the lever principle, in the process of the ascending of the top plate 31, the short rod 335 ascends by the pushing of the top plate 31, at this time, the primary ejector rod 321 and the secondary ejector rod 331 ascend simultaneously to eject the product, after short rod 335 has been pushed up against the lower end of lower die assembly 20, short rod 335 does not continue to move upward, the pushing plate still needs to be lifted for a certain distance according to the stroke setting, at this time, the short rod 335 presses the tilting plate 333, so that one end of the tilting plate 333, which is positioned at the short rod 335, faces downwards, one end of the tilting plate which is positioned at the second ejection rod faces upwards, thereby driving the secondary ejector rod 331 to make acceleration rise, making the upper end of the secondary ejector rod 331 gradually higher than the upper end of the primary ejector rod 321, finally driving the product to separate from the primary ejector rod 321, with this structural design, the secondary ejection lever 331 can automatically perform the re-ejection operation.

As further shown in fig. 3, four secondary ram assemblies 33 are provided, and the four secondary ram assemblies 33 respectively correspond to four corners of the lower die cavity 21; the stability of the re-ejection operation is improved.

As further shown in fig. 5, the lower end of the first connection hole 312 is provided with a limiting groove 314, the lower end of the short rod 335 is provided with a limiting portion 317, and the limiting groove 314 and the limiting portion 317 are in blocking fit; an expansion part 316 into which the limiting part 317 extends is arranged at the position of the accommodating cavity 311 corresponding to the lower part of the short rod 335; with this design, the short bar 335 can be restrained on the top plate 31, and also one end of the seesaw member 333 can be pressed downward.

As further shown in fig. 5, a spring stop ring 315 is disposed at an upper end of the second connection hole 313, a spring stop portion 318 is disposed at a lower end of the secondary ejection rod 331, a return spring 336 is sleeved on the secondary ejection rod 331, and the return spring 336 is limited between the spring stop ring 315 and the spring stop portion 318; the spring stopper 318 is in blocking fit with the opening of the receiving cavity 311; through the design, the secondary ejection rod 331 can be limited on the top plate 31, the secondary ejection operation is completed upwards, and the secondary ejection rod 331 is returned to the original position through the return spring 336 after the secondary ejection operation is completed.

As further shown in fig. 4 to 5, a shaft hole 337 is formed in the middle of the rocker member 333, the rocker member 333 rotates around the shaft pin 334 through the shaft hole 337, and a recess 338 is formed between the middle and each end of the rocker member 333; a support part 339 is arranged at the lower part of the tilting plate part 333, and the support part 339 leans against the lower position of the secondary ejection rod 331; in the above embodiment, by providing the recess 338, the fit between the short rod 335 and the rocker 333 and the secondary ejector rod 331 and the rocker 333 can be more stable; the supporting portion 339 is arranged to improve the supporting force of the secondary ejector rod 331 and prevent the secondary supporting rod portion from sinking into the accommodating groove to influence the matching of the upper end of the secondary ejector rod 331 and the lower die cavity 21.

As further shown in fig. 2, the upper end of the top plate 31 is provided with a limiting column 34, and the upper end of the limiting column 34 is lower than the upper end of the short rod 335; the top plate 31 is in limit fit with the lower die assembly 20 through the limit column 34, and plays a role in buffering and protecting the short rod 335.

As further shown in fig. 2 and 5, the top plate 31 includes a top plate 35 and a bottom plate 36, the first connection hole 312 and the second connection hole 313 are disposed on the top plate 35, and the accommodation cavity 311 is disposed on the bottom plate 36; it is convenient to mount the short bar 335, the secondary eject bar 331, the primary eject bar 321, and the seesaw member 333 on the top plate 31.

To further explain the above technical means, the following working principles will be explained in more detail:

the working principle is as follows:

opening the mold, driving the top plate 31 to drive the primary ejection rod 321, the secondary ejection rod 331 and the short rod 335 to ascend, the primary ejection rod 321 and the secondary ejection rod 331 to eject the molded product upward, when the top plate 31 ascends to the short rod 335 to eject the lower mold component 20, the short rod 335 stops ascending, applying downward pressing force to the tilting plate member 333, so that one end of the tilting plate member 333 corresponding to the short rod 335 descends, and one end of the tilting plate member 331 upwards corresponds to the secondary ejection rod 331, thereby driving the secondary ejection rod 331 to ascend at an accelerated speed, gradually raising the upper end of the secondary ejection rod 331 above the upper end of the primary ejection rod 321, finally driving the product to be separated from the primary ejection rod 321, taking down the product after the product is separated from the primary ejection rod 321, resetting the push plate, and resetting the secondary ejection rod 331 under the action of the reset spring 336, so that the secondary ejection rod 331 returns to the original state corresponding to the height of the primary ejection rod 321 again.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A mould with a secondary ejection structure comprises an upper mould component, a lower mould component and an ejection mechanism, wherein an upper mould cavity is arranged on the upper mould component, a lower mould cavity is arranged on the lower mould component, a sliding limiting rod is arranged between the upper mould component and the lower mould component, and the upper mould component and the lower mould component are in sliding fit through the sliding limiting rod, so that the upper mould cavity and the lower mould cavity complete mould closing and mould opening operations; the method is characterized in that:

2. The mold with the double ejection structure according to claim 1, wherein: the pushing mechanism comprises a seesaw part, a shaft pin, a short rod and a reset spring, a containing cavity is arranged in the top plate, the shaft pin is arranged in the containing cavity, the middle part of the seesaw part rotates around the shaft pin, a first connecting hole and a second connecting hole are respectively arranged on the top plate in a penetrating way corresponding to positions above two ends of the seesaw part, the short rod is vertically arranged, the lower end of the short rod stretches and retracts in a sliding way along the first connecting hole, and the lower end of the short rod abuts against one end of the seesaw part; the lower end of the secondary ejection rod slides and stretches along the second connecting hole, and abuts against the other end of the warping plate; reset spring sets up in the second connecting hole, and reset spring and secondary knock-out lever elastic fit.

3. A mold having a double ejection structure according to any one of claims 1 to 2, wherein: the number of the secondary ejector rod assemblies is four, and the four secondary ejector rod assemblies respectively correspond to the four corners of the lower die cavity.

4. The mold with the double ejection structure according to claim 2, wherein: the lower end of the first connecting hole is provided with a limiting groove, the lower end of the short rod is provided with a limiting part, and the limiting groove is in blocking fit with the limiting part; the position of the containing cavity corresponding to the lower part of the short rod is provided with an expansion part for the limiting part to extend into.

5. The mold with the double ejection structure according to claim 2, wherein: the upper end of the second connecting hole is provided with a spring stop ring, the lower end of the secondary ejection rod is provided with a spring stop part, a reset spring is sleeved on the secondary ejection rod, and the reset spring is limited between the spring stop ring and the spring stop part; the spring blocking part is in blocking fit with the opening of the accommodating cavity.

6. The mold with the double ejection structure according to claim 2, wherein: the middle part of the seesaw part is provided with a shaft hole, the seesaw part rotates around a shaft pin through the shaft hole, and the positions from the middle part to the two ends of the seesaw part are respectively provided with a concave part; the lower part of the tilting plate is provided with a supporting part which is close to the lower position of the secondary ejection rod.

7. A mold having a double ejection structure according to any one of claims 4 to 6, wherein: the upper end of the top plate is provided with a limiting column, and the upper end of the limiting column is lower than the upper end of the short rod; the top plate is in limit fit with the lower die assembly through the limit columns.

8. The mold with the double ejection structure according to claim 7, wherein: the roof is including ejector pin panel and ejector pin bottom plate, and first connecting hole and second connecting hole set up on the ejector pin panel, hold the chamber setting on the ejector pin bottom plate.