CN214000434U - Secondary ejection seesaw structure of mold - Google Patents

Abstract

The utility model discloses an ejecting seesaw structure of mould secondary, the fluting hole on the lower thimble board of mould, through round pin axle installation seesaw in the slotted hole, the seesaw both ends are pushed up respectively and are touched thimble and short ejector pin, utilize the public template to push down short ejector pin, make the seesaw structure other end perk, push up the thimble once more and touch to it is ejecting to realize the secondary of mould, uses the spring of suit on the thimble simultaneously, rebounds the thimble after the mould resets, realizes the automatic re-setting of thimble. The utility model overcomes the ejecting structure of traditional secondary needs the polylith thimble board, blocks down the thimble board at the mould foot, and the layering is ejecting to lead to the mould structure complicated, and the problem of mould cost increase reduces the quantity of thimble board through using the seesaw structure, and ejecting structural optimization, the ejecting effect of mould secondary is better, improves the ejecting structure of the effectual simplification mould of above-mentioned, has practiced thrift the mould cost, improves mould production efficiency.

Description

Secondary ejection seesaw structure of mold

Technical Field

The utility model belongs to the technical field of the ejecting technique of mould and specifically relates to an ejecting seesaw structure of mould secondary is related to.

Background

The mold secondary ejection structure is commonly used in the production of injection molds, is also called as run-away, and is generally used for molds with complex product structures, namely, the ejector pins are fixed with the two ejection plates. When demoulding, the ejector pins advance simultaneously, and when the primary ejection position is limited, the secondary ejector pins can continue to advance until the product is dragged down.

The common secondary ejection structure for mold is to fix several ejector pins with several ejector pin plates. Generally, two ejector plates are used for fixing ejector pins for primary ejection, then two ejector plates are mounted on the two ejector plates for fixing ejector pins for secondary ejection, the upper ends of the ejector pins for secondary ejection are flush, and four ejector plates move simultaneously during ejection to perform primary ejection; after the first ejection is finished, the lower ejector plate stops ejecting movement by utilizing the blocking of the mold foot, and the upper ejector plate continues moving to drive the ejector pin to perform secondary ejection.

Therefore, compared with a common mold which uses two ejector plates, the mold with the secondary ejection structure has a complex structure and increases the cost of the mold. However, for products with special shapes or requiring automatic mass production, if the finished products are still in the mold cavity after being ejected once, or the finished products cannot fall off automatically, the production efficiency is affected; part of the ejection stroke needs a larger product, secondary ejection is needed to reduce the force applied by the ejector pin during ejection, and the defect of the product during ejection is avoided; or the secondary ejection of the die is indispensable under the condition that the forming time of the finished product is required to be prolonged. Therefore, the ejection structure which is simple in structure and cost-saving and can realize the reliable secondary ejection function is needed.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the above-mentioned current ejecting structure of mould secondary, the utility model provides an utilize seesaw structure to realize the ejecting structure of mould secondary.

The utility model relates to an ejecting seesaw structure of mould secondary, mainly used simplifies the ejecting structure of mould secondary, practices thrift the mould cost. The utility model provides a scheme that its technical problem adopted is: a secondary ejection seesaw structure of a die comprises a lower ejector plate, an upper ejector plate, a seesaw, an ejector pin and a short ejector rod, wherein a groove is formed in the lower ejector plate of the die;

the upper ejector plate is provided with through holes, the ejector pins and the short ejector pins penetrate through the corresponding through holes, the lower ends of the through holes for mounting the ejector pins are partially shielded by the lower ejector plate, so that the ejector pins cannot fall into the slotted holes of the lower ejector plate, meanwhile, the protruding points at the long arm end of the seesaw are not influenced to push and contact the ejector pins, and the upper ends of the short ejector pins are exposed out of the upper ejector plate and do not contact the male template of the mold;

the ejector pin is longer than the short ejector rod, the weight of the ejector pin is larger, the short ejector rod cannot tilt the ejector pin through the seesaw under the condition of no stress, meanwhile, the ejector pin is blocked by the lower ejector plate and cannot fall down, and the seesaw can be kept in a horizontal state under a natural state.

Further, the thimble lower extreme is provided with and keeps off the platform, keeps off the platform and is located thimble board upside, keeps off the bench installation spring, and the spring suit is on the thimble, and the spring other end top touches in public template below, utilizes the firm thimble state of spring, realizes the automatic resilience of thimble simultaneously and resets.

Further, the lower end of the short ejector rod is provided with a blocking platform, the upper ejector plate is provided with a groove matched with the blocking platform, the blocking platform of the short ejector rod is arranged in the groove of the upper ejector plate, the bottom surface of the blocking platform is flush with the lower surface of the upper ejector plate, and the blocking platform is used for preventing the short ejector rod from being separated.

Furthermore, the pin shaft is sleeved with a torsion spring for stabilizing the seesaw, simultaneously, the stress of the seesaw is improved, and the ejector pin is prevented from being ejected out due to mistaken touch, so that the quality of the die is influenced.

Further, the lower ejector plate and the upper ejector plate are fixed through bolts.

Further, install the gasket between spring and the public template, prevent that direct contact produces wearing and tearing between the structure.

The beneficial effects of the utility model

The utility model discloses a secondary ejection structure for mould, this secondary ejection structure uses the seesaw to realize the secondary ejecting of mould, utilize short ejector pin to be pushed down by the public template of mould, the thimble that will be located the seesaw other end carries out the secondary perk, the secondary that realizes the mould is ejecting, simultaneously because the seesaw length of seesaw both sides is different, the lower stroke footpath of short ejector pin is enlarged through the seesaw, increase the ejecting stroke of thimble, strengthen the ejecting effect of secondary, use the seesaw structure can reduce a thimble board, the mould structure has been simplified, the mould cost has been practiced thrift.

The torsion spring is arranged on the seesaw shaft, so that the stability of the seesaw is controlled, the seesaw structure is prevented from shaking due to stress, meanwhile, the seesaw can be triggered only due to stress when the seesaw is ejected for the second time, and unnecessary product defects caused by ejection of the ejector pins due to mistaken contact of a mold are prevented; the short ejector rod is provided with the baffle table, the structure of the short ejector rod is optimized, the seesaw can be kept horizontal, and the short ejector rod can be prevented from being separated easily.

The ejector pin is sleeved with a spring structure to prevent the ejector pin from shaking, and the ejector pin is automatically rebounded and reset by the spring when the mold is contracted; the addition of the gasket prevents the structures from directly contacting and wearing.

Drawings

FIG. 1: the cross section of the seesaw structure is installed in the mould.

FIG. 2: the schematic diagram of the one-step ejection cross section structure of the mold.

FIG. 3: the cross-sectional structure of the mold is determined twice.

FIG. 4: the see-saw structure is partially enlarged.

Reference numbers in the figures: the device comprises a lower ejector plate 1, an upper ejector plate 2, a seesaw 3, an ejector pin 4, a short ejector rod 5, a torsion spring 6, a long arm 31, a short arm 32 and a salient point 33.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example 1: as shown in fig. 1, the secondary ejection seesaw structure of the mold comprises a lower ejector plate 1, an upper ejector plate 2, a seesaw 3, an ejector pin 4 and a short ejector rod 5, wherein a groove is formed in the lower ejector plate 1 of the mold, the seesaw 3 is arranged in the groove hole through a pin shaft, the groove hole is large enough, and the seesaw 3 can freely move in the groove hole;

the salient points 33 are arranged at the end parts of the two sides of the seesaw 3 and are used for jacking the thimble 4 and the short ejector rod 5, the contact area of the salient points 33 is small, and the salient points cannot be clamped or cause other problems in the jacking process;

the end salient point 33 of the seesaw long arm 31 is propped against the lower end surface of the ejector pin 4, the end salient point 33 of the seesaw short arm 32 is propped against the lower end surface of the short ejector rod 5, and the stroke of the short ejector rod 5 can be amplified in the tilting process by utilizing the length difference between the long arm 31 and the short arm 32, so that the ejector pin 4 can be pushed out by the maximum ejection distance in short movement, and the effect of ejecting the die is improved;

the upper ejector plate 2 is provided with through holes, the ejector pins 4 and the short ejector pins 5 penetrate through the corresponding through holes, the upper end portions of the ejector pins 4 penetrate through the male template at the same time, the upper end surfaces of the ejector pins 4 are flush with the surface of the male template, and the positions and the moving directions of the ejector pins and the short ejector pins are limited by the through holes of the upper ejector plate 2.

The lower end of a through hole for installing the thimble 4 is partially shielded by the lower thimble plate 1, so that the thimble 4 cannot fall into a slotted hole of the lower thimble plate 1, meanwhile, the salient point of the long arm end of the seesaw is not influenced to push against the thimble 4, the thimble 4 and the lower thimble plate 1 are both made of metal, the lower thimble plate 1 is partially shielded to support the thimble 4, and the salient point can move in a smaller hole due to small area and does not influence the ejection action of the seesaw 3.

When the ejection action is not performed, the upper end of the short ejector rod 5 is exposed out of the upper ejector plate 2, the upper end of the short ejector rod 5 is not in contact with a male template of the mold, the length of the short ejector rod 5 is determined according to the one-time ejection distance of the mold, and the distance between the upper end of the short ejector rod 5 and the male template is the one-time ejection stroke of the mold.

The mold ejection process is as shown in fig. 2 and fig. 3, the upper ejector plate and the lower ejector plate of the mold move upwards to drive the ejector pins 4 and the short ejector rods 5 to move synchronously, the ejector pins 4 eject the mold, and the short ejector rods 5 move to contact the male mold plate to complete one-time ejection of the mold.

The upper ejector pin plate and the lower ejector pin plate continue to move, the short ejector pin 5 pushes the male die plate to stop moving, the short arm of the seesaw 3 is pressed downwards, the other end of the seesaw 3 upwards tilts to jack the ejector pin 4, secondary ejection of the die is carried out, because of the length difference of the long arm 31 and the short arm 32, the stroke of the long arm 31 is increased, the ejection distance of the ejector pin 4 is increased, and secondary ejection distance change is realized.

Example 2: as shown in fig. 1-3, the thimble 4 is provided with a baffle table at a position close to the upper thimble plate 2, a spring is sleeved above the baffle table, the upper end of the spring is propped against the lower surface of the male template, and the thimble 4 is pressed on the upper thimble plate 2 by using the expansion force of the spring; when the mold is ejected, the ejector plate moves to compress the spring, and is further pressed by the ejector pin 4, so that the mold is firmly fixed; after the ejection action of the die is finished, the spring is stretched to rebound the thimble 4 to reset;

install the spring additional on thimble 4, not only can be with further reinforcement of thimble 4, the spring provides the resilience force simultaneously, at the mould reset in-process, with the automatic normal position that returns of thimble, improve mould efficiency.

The gasket installed between the spring and the male template reduces the contact between the spring and the male template, thereby reducing the friction loss between the spring and the male template.

The lower end of the short ejector rod 5 is provided with a baffle table, the lower surface of the upper ejector rod plate 2 is provided with a corresponding groove, the baffle table of the short ejector rod 5 is arranged in the groove, the lower surface of the baffle table is flush with the lower surface of the upper ejector rod plate 2, and the baffle table is used for preventing the short ejector rod from being separated.

Example 3: as shown in the seesaw structure in figure 4, the pin shaft is sleeved with a torsion spring, one end of the torsion spring is fixed on the seesaw arm, the other end of the torsion spring is contacted with the upper ejector plate 2, the torsion force of the torsion spring is utilized to keep the seesaw 3 in a stable state, and the seesaw 3 is prevented from shaking under an unstressed state.

Meanwhile, the upper ejector plate 2 and the lower ejector plate 1 are fixed through bolts and used for mounting the ejector pins 4, the short ejector rods 5 and the seesaw 3.

It is right through the above-mentioned embodiment the utility model discloses a part embodiment carries out simple description, and the structure of the ejecting structure of current secondary is complicated, and the mould is with high costs, improves the ejecting structure of secondary that can effectual simplification mould through the aforesaid, has practiced thrift the mould cost.

Claims (6)

1. A die secondary ejection seesaw structure is characterized by comprising a lower ejector plate (1), an upper ejector plate (2), a seesaw (3), an ejector pin (4) and a short ejector pin (5), wherein a groove hole is formed in the lower ejector plate (1) of the die, the seesaw (3) is installed in the groove hole through a pin shaft, salient points (33) are arranged at the end parts of two sides of the seesaw (3), the end part salient point (33) of a long seesaw arm (31) is abutted to the lower end surface of the ejector pin (4), the end part salient point (33) of a short seesaw arm (32) is abutted to the lower end surface of the short ejector pin (5), the upper ejector plate (2) is provided with a through hole, the ejector pin (4) and the short ejector pin (5) penetrate through the corresponding through holes, the lower end of the through hole where the ejector pin (4) is installed is partially shielded by the lower ejector plate (1), so that the ejector pin (4) cannot fall into the groove hole of the lower ejector pin (1), and the salient point at the end, the upper end of the short ejector rod (5) is exposed out of the upper ejector pin plate (2) and does not contact the male template of the die.

2. The mold double-ejection seesaw structure according to claim 1, wherein the lower end of the ejector pin (4) is provided with a baffle table, the baffle table is located on the upper side of the upper ejector pin plate (2), a spring is installed on the baffle table, the spring is sleeved on the ejector pin (4), and the other end of the spring is abutted against the lower part of the male mold plate.

3. The mold double ejection seesaw structure according to claim 1, wherein the short ejector pins (5) are provided with a stop at the lower end, the upper ejector pin plate (2) is provided with a groove matching with the stop, the stop of the short ejector pins (5) is placed in the groove of the upper ejector pin plate (2), and the bottom surface of the stop is flush with the lower surface of the upper ejector pin plate (2).

4. The mold double ejection seesaw structure of claim 1, wherein the pin is sleeved with a torsion spring (6) for stabilizing the seesaw (3).

5. The mold double ejection seesaw structure according to claim 1, wherein the lower ejector plate (1) and the upper ejector plate (2) are fixed by bolts.

6. The mold double ejection seesaw structure of claim 2, wherein a spacer is installed between the spring and the male mold plate.

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