CN218342751U - Injection mold and ejection mechanism for injection mold - Google Patents

Abstract

The utility model relates to a product field of moulding plastics especially relates to an injection mold and be used for injection mold's ejection mechanism. Comprises a shovel base, an inclined guide post, a slide, a stop block, an elastic pin, an elastic piece, an upper die and a fixed die. The inclined guide post is arranged on the shovel machine, the slide is in sliding fit with the inclined guide post, the stop block is arranged on the shovel base, the stop block is provided with a vertical surface and an inclined surface, the elastic needle is arranged in the slide, the elastic needle is respectively abutted against the stop block and a product, and the elastic piece is sleeved on the elastic needle. During the die sinking, the bullet needle is motionless and withstands the product, and the shovel base drives oblique guide pillar and dog upward movement, and the product motion is kept away from to the line position to compress the elastic component, the vertical face butt of bullet needle and dog this moment. When the shovel base continues to move upwards, the elastic needle is abutted against the inclined plane of the stop block, and the elastic needle moves away from the product under the elastic action of the elastic piece to release the product. Effectively prevent to result in the risk that the product is stretched and damaged because of the product adhesion on the mould, improved the yields.

Description

Injection mold and ejection mechanism for injection mold

Technical Field

The utility model relates to a product field of moulding plastics especially relates to an injection mold and be used for injection mold's ejection mechanism.

Background

Injection molding is a method of manufacturing plastic articles by injecting molten plastic into a plastic article mold under pressure and cooling to form various desired plastic parts.

Traditional injection mold is in process of production, and the movable mould of mould is kept away from the cover half and when the mould was opened, the product easily adhered on the movable mould, leads to the product by tensile deformation, and then the rejection rate is higher. For avoiding product and movable mould adhesion, current mould has increased ejection mechanism, and ejection mechanism includes the bullet needle, bullet needle one end and shovel base butt, the other end can with fashioned product butt. When the mold is opened, the elastic needle is pushed to the direction of the product by the shovel base, so that the elastic needle is pushed to the product; when the shovel base servo mould moves for a certain distance, the shovel base is not abutted to the elastic needle any more, and the elastic needle is separated from the product under the action of elasticity. This kind of scheme can solve the problem of product and movable mould adhesion through setting up the bullet needle.

When the elastic needle abuts against the product which is not completely cooled, certain viscosity is still kept between the elastic needle and the product, and when the elastic needle is reset, the elastic needle is separated from the product at a high speed under the action of elastic force, so that the risk of damaging the local structure of the product is caused, and the product is not well formed.

Further, one end of the pogo pin directly slides against the shovel base, and the shovel base may be worn. The shovel base influences the butt effect to the bullet needle after wearing and tearing to influence product drawing of patterns quality, consequently need in time change. The shovel base is large in structural size, complex in shape and high in cost for replacing the shovel base.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection mold and an ejection mechanism for the injection mold, which solves the problem that when the mold is opened, a product is adhered to a movable mold, so that the product is stretched and damaged; the problem that when the elastic needle is reset, the elastic needle is separated from the product quickly under the action of elastic force, the local structure of the product is damaged, and the product is not formed well is solved; still solved the direct and shovel base slip butt of bullet needle one end, and then the problem of wearing and tearing shovel base.

In order to realize the purpose, the following technical scheme is provided:

a ejection mechanism for injection mold, injection mold include mould and cover half, go up the mould and set up in the top of line position, and the cover half sets up in the below of line position, goes up mould, line position and cover half and encloses into the die cavity, should be used for injection mold ejection mechanism to include:

the shovel base comprises a shovel base main body and a stop block, the stop block is detachably arranged on the shovel base main body, the shovel base main body is fixed with the upper die, the stop block is provided with a vertical surface and a first inclined surface connected with the bottom end of the vertical surface, and the first inclined surface inclines from top to bottom in the direction away from the cavity;

the inclined guide pillar is arranged on the shovel base, the inclined guide pillar is inclined from top to bottom in the direction away from the cavity, the inclined guide pillar is slidably arranged in the slide, and the upper die drives the inclined guide pillar to move up and down and simultaneously drives the slide to move horizontally;

one end of the elastic needle can be abutted against the vertical surface of the stop block, so that the other end of the elastic needle can extend into the cavity to be abutted against a formed product;

the elastic piece is connected with the elastic needle in an abutting mode, and the elastic piece can drive the elastic needle to move towards the direction away from the product.

Optionally, there are a plurality of elastic needles, and each elastic needle is correspondingly provided with a stop.

Optionally, the stopper is provided in plurality, each capable of abutting at least one pogo pin.

Optionally, a through hole is formed in the slide, the bullet needle penetrates through the through hole in a sliding mode, the elastic piece is sleeved on the bullet needle, one section of the elastic piece is abutted against the slide, and the other end of the elastic piece is abutted against or connected with the bullet needle.

Optionally, the bullet needle comprises a first shaft section, a second shaft section and a third shaft section, and the shaft diameter of the second shaft section is larger than that of the first shaft section and that of the third shaft section; the through-hole includes first hole section, second hole section and third hole section, the aperture and the first shaft section adaptation of first hole section, the aperture and the second shaft section adaptation of second hole section, the aperture and the third shaft section adaptation of third hole section, the length of second hole section is greater than the axial dimension of second shaft section.

Optionally, the slide comprises a slide block and a lower die, the lower die is detachably connected with the slide block, the first hole section and the second hole section are located in the slide block, and the third hole section is located in the lower die; the lower die, the upper die and the fixed die are enclosed to form a cavity.

Optionally, the resilient member is sleeved over the third shaft section and within the second bore section.

Optionally, the spring needle further comprises a fourth shaft section, the fourth shaft section is located in the lower die, the shaft diameter of the fourth shaft section is smaller than that of the third shaft section, and the fourth shaft section abuts against the product; the through hole further comprises a fourth hole section, and the hole diameter of the fourth hole section is matched with that of the fourth shaft section.

Optionally, the injection mold ejection mechanism further comprises a wear-resistant block, the wear-resistant block is tightly arranged on the shovel base, the wear-resistant block and the slide are both provided with second inclined planes, slopes of the wear-resistant block and the slide are the same, and the wear-resistant block and the slide are in sliding fit.

An injection mold comprising:

the ejection mechanism for the injection mold is disclosed.

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

the utility model provides an injection mold and be used for injection mold's ejection mechanism, during the die sinking, the shovel base drives oblique guide pillar and dog upward movement, and the product direction removal and compression spring are kept away from to the capable position, and the bullet needle is motionless and respectively with the vertical face of dog and product butt this moment to prevent that the product adhesion from leading to being stretched the damage on the mould. When bullet needle and dog inclined plane butt, the product direction motion is slowly kept away from to the bullet needle under the elastic action of elastic component, releases the product to be convenient for the product to take out, and avoided the bullet needle to break away from the product fast under the effect of spring elastic force and made the bullet needle destroy product local structure, have the problem that the product shaping is not good. The bullet needle has solved the problem of bullet needle wearing and tearing shovel base with the dog butt, can guarantee the butt effect of bullet needle and product through changing the dog, and the cost of changing the dog is lower.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural view of an injection mold and an ejection mechanism for the injection mold provided by the present invention;

fig. 2 is a schematic view of an assembly structure of the shovel base, the stop block, the elastic needle and the wear-resistant block provided by the present invention;

fig. 3 is a schematic structural view of the bullet needle provided by the present invention;

fig. 4 is a cross-sectional view of a slide through hole provided by the present invention;

fig. 5 is a sectional view of the assembly position of the slide, the pogo pin, and the elastic member according to the present invention.

Reference numerals:

1. a shovel base; 11. a shovel base body; 12. a stopper; 121. a vertical plane; 122. a first inclined plane;

2. an inclined guide post;

3. a line bit; 31. a slider; 32. a lower die;

41. an upper die; 42. fixing a mold;

5. a needle is flicked; 51. a first shaft section; 52. a second shaft section; 53. a third shaft section; 54. a fourth shaft section;

6. an elastic member;

7. a wear-resistant block; 71. a second inclined plane;

8. producing a product;

9. a through hole; 91. a first bore section; 92. a second bore section; 93. a third bore section; 94. a fourth bore section.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

As shown in fig. 1, the utility model provides an injection mold, this injection mold include lower mould 32, go up mould 41, cover half 42 and be used for injection mold's ejection mechanism, go up mould 41 and set up in the top of lower mould 32, and cover half 42 sets up in the below of lower mould 32, goes up mould 41, lower mould 32 and cover half 42 and encloses into the die cavity, and product 8 after injection moulding is located the die cavity. The ejection mechanism of the injection mold comprises a shovel base 1, an inclined guide post 2, a spring needle 5 and an elastic piece 6. The shovel base 1 comprises a shovel base main body 11 and a stop block 12, the stop block 12 is detachably arranged on the shovel base main body 11, the shovel base main body 11 is fixed to the upper die 41, a vertical surface 121 and a first inclined surface 122 connected with the bottom end of the vertical surface 121 are arranged on the stop block 12, and the first inclined surface 122 inclines from top to bottom in the direction away from the cavity. The inclined guide post 2 is arranged on the shovel base 1, and the inclined guide post 2 inclines from top to bottom in the direction away from the cavity. The oblique guide pillar 2 is slidably arranged in the slide 3 in a penetrating manner, and the upper die 41 drives the oblique guide pillar 2 to move up and down and simultaneously the oblique guide pillar 2 pushes the slide 3 to move horizontally. One end of the pogo pin 5 can abut against the vertical face 121 of the stopper 12 so that the other end of the pogo pin 5 can extend into the cavity to abut against the molded product 8. The elastic member 6 abuts or is connected with the latch 5, and the elastic member 6 can drive the latch 5 to move towards the direction away from the product 8.

When the mold is opened, the upper mold 41 drives the shovel base main body 11, the stop block 12 and the inclined guide post 2 to move upward together, and meanwhile, the inclined guide post 2 is in sliding fit with the slide 3, so that the slide 3 moves in a direction away from the product 8 and compresses the elastic piece 6. At this time, the elastic needle 5 is in sliding fit with the row 3, and two ends of the elastic needle 5 are respectively abutted with the vertical surface 121 of the stopper 12 and the product 8. Thus, at this stage the latch 5 does not move and the latch 5 continues to hold against the product 8. Therefore, at this stage, when the cavity is opened, the product 8 is held by the elastic needle 5, so that the product 8 is prevented from being stretched and deformed due to adhesion of the product 8 to the upper die 41. When the shovel base main body 11, the stopper 12, the inclined guide post 2 and the slide 3 continue to move, and the first inclined surface 122 of the stopper 12 contacts the pogo pin 5, the pogo pin 5 slowly moves away from the product 8 under the elastic force of the elastic member 6. At this stage, the latch 5 no longer holds the product 8, thereby releasing the product 8. This embodiment sets up dog 12 on shovel machine 1, has avoided effectively that bullet needle 5 is direct to cause the problem of shovel base 1 wearing and tearing when taking place relative slip with shovel base 1 butt. The influence is to the butt effect of bullet needle 5 after 1 wearing and tearing of shovel base, and then influences product drawing of patterns quality, and this problem has been avoided in setting up of dog 12. And the stop block 12 is convenient to disassemble and assemble and has lower cost. The shovel base 1 is large in structural size, complex in shape and high in cost for replacing the shovel base. In addition, since the product 8 is not completely cooled rapidly after being molded, a certain viscosity still exists between the elastic needle 5 and the product 8 when the elastic needle abuts against the product 8. To this problem, set up first inclined plane 122 on dog 12, played the effect that makes bullet needle 5 slow moving, avoided bullet needle 5 to break away from product 8 fast under the effect of elastic force, made bullet needle 5 destroy the local structure of product 8, caused the not good problem of product 8 shaping.

Specifically, in the present embodiment, as shown in fig. 1, the ejection mechanism for an injection mold has rows 3 on both left and right sides, and each row 3 includes a lower mold 32 and a slider 31; each slide 3 is provided with a spring pin 5 and a spring 6. Each product 8 is abutted by two left and right pogo pins 5.

Further, as shown in fig. 2, there are a plurality of the latch needles 5, and each latch needle 5 is correspondingly provided with a stopper 12.

Further, the stopper 12 is provided in plurality, and each stopper 12 can abut against at least one latch 5. This scheme can suitably lengthen the length of dog 12, makes a dog 12 can with a plurality of bullet needle 5 butts, can make the butt more firm, in addition, reaches one multi-purpose, easy dismounting's effect.

Specifically, in this embodiment, there are shovel bases 1 on both sides, and both ends and the bottom that every shovel base 1 is relative all are provided with dog 12. The stoppers 12 at the two ends of the shovel base 1 are respectively abutted with one elastic needle 5, and the stoppers 12 at the bottom of the shovel base 1 can be abutted with a plurality of elastic needles 5.

Further, be provided with through-hole 9 in the position 3, in the through-hole 9 is worn to locate by bullet needle 5 slides, and elastic component 6 cover is established on bullet needle 5, and the one end and the 3 butt in position, the other end and the butt of bullet needle 5 of elastic component 6 or be connected. The slide 3 provides a sliding space for the latch 5, and the elastic member 6 provides an elastic force to slide the latch 5 in the through hole 9.

Further, as shown in fig. 3, the latch 5 includes a first shaft segment 51, a second shaft segment 52 and a third shaft segment 53, the second shaft segment 52 has a larger shaft diameter than the first shaft segment 51 and the third shaft segment 53; as shown in fig. 4, the through hole 9 includes a first hole section 91, a second hole section 92, and a third hole section 93, the first hole section 91 has a hole diameter adapted to the first shaft section 51, the second hole section 92 has a hole diameter adapted to the second shaft section 52, the third hole section 93 has a hole diameter adapted to the third shaft section 53, and the second hole section 92 has a length greater than the axial dimension of the second shaft section 52. This scheme sets up through-hole 9 into a plurality of hole sections, and is spacing for bullet needle 5 when providing the sliding space, and the step face of first hole section 91 and second hole section 92 has restricted bullet needle 5 can not be popped out by elastic component 6 and has moved position 3.

Further, the slide 3 comprises a slide block 31 and a lower die 32, the lower die 32 and the slide block 31 are detachably connected, the first hole section 91 and the second hole section 92 are positioned in the slide block 31, and the third hole section 93 is positioned in the lower die 32; the lower die 32, the upper die 41 and the fixed die 42 enclose a cavity. According to the scheme, the slide 3 is set to be the detachable slide block 31 and the detachable lower die 32, so that the elastic needle 5 and the elastic piece 6 in the slide block are conveniently detached.

Alternatively, the lower die 32 and the slider 31 are connected by bolts.

Further, as shown in fig. 5, the elastic member 6 is disposed on the third shaft section 53 and located in the second hole section 92. This arrangement allows the elastic member 6 to abut against the latch 5 and the row 3, respectively, whereby the elastic member 6 can provide elastic force to the latch 5.

Alternatively, the elastic member 6 may be a spring, which is low in cost.

Further, the latch 5 further includes a fourth shaft section 54, the fourth shaft section 54 is located in the lower die 32, the shaft diameter of the fourth shaft section 54 is smaller than that of the third shaft section 53, and the fourth shaft section 54 abuts against the product 8; the through-hole 9 further comprises a fourth hole section 94, and the hole diameter of the fourth hole section 94 is matched with the fourth shaft section 54. The fourth shaft section 54 of the bullet needle 5 is set to be a small shaft diameter in the scheme, so that when the product 8 is small in overall structure, complex in surface structure and incapable of providing a large contact area, a small shaft section is required to abut against the product; the fourth bore section 94 is configured to slide with the fourth shaft section 54 and ensure that the injection solvent does not leak into the third shaft section 53.

Further, as shown in fig. 5, the ejection mechanism for the injection mold further includes a wear-resistant block 7, the wear-resistant block 7 is detachably disposed on the shovel base 1, the wear-resistant block 7 and the slide 3 are both provided with second inclined planes 71, and the slopes of the second inclined planes are the same, and the wear-resistant block 7 and the slide 3 are in sliding fit. The wear-resisting block 7 prevents the abrasion between the shovel base 1 and the slide 3, the wear-resisting block 7 is replaceable, and the cost of the wear-resisting block 7 is low.

Optionally, the material of the wear-resistant block 7 is beryllium copper or oily steel.

Optionally, to this injection mold and be used for injection mold's ejection mechanism, an increase product derivation mechanism, after bullet needle 5 breaks away from product 8, product 8 can be derived by this product derivation mechanism, is convenient for high-efficiently collect product 8, prevents that product 8 from dropping everywhere.

Specifically, this product is derived mechanism includes thimble and drive arrangement, and the thimble setting is in the below of product 8, and the thimble is driven by drive arrangement and is removed to product 8, and then with 8 ejecting moulds of product to be convenient for take out product 8.

It is noted that in the description herein, references to the description of "some embodiments," "other embodiments," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. An ejection mechanism for injection mold, injection mold includes last mould (41) and cover half (42), go up mould (41) and set up in the top of slide (3), cover half (42) set up in the below of slide (3), go up mould (41), slide (3) and cover half (42) enclose into the die cavity, its characterized in that, an ejection mechanism for injection mold includes:

the shovel base (1) comprises a shovel base main body (11) and a stop block (12), the stop block (12) is detachably arranged on the shovel base main body (11), the shovel base main body (11) is fixed with the upper die (41), a vertical surface (121) and a first inclined surface (122) connected with the bottom end of the vertical surface (121) are arranged on the stop block (12), and the first inclined surface (122) inclines from top to bottom in a direction away from the cavity;

the inclined guide post (2) is arranged on the shovel base (1), the inclined guide post (2) is inclined from top to bottom in the direction away from the cavity, and the inclined guide post (2) is slidably arranged in the slide (3) in a penetrating manner; the upper die (41) drives the inclined guide post (2) to move up and down, and simultaneously, the inclined guide post (2) drives the slide (3) to move horizontally;

one end of the elastic needle (5) can be abutted against the vertical surface (121) of the stop block (12), so that the other end of the elastic needle (5) can extend into the cavity to be abutted against the molded product (8);

the elastic piece (6) is abutted or connected with the elastic needle (5), and the elastic piece (6) can drive the elastic needle (5) to move towards the direction far away from the product (8).

2. The ejection mechanism for an injection mold according to claim 1, characterized in that the elastic needle (5) is plural, and each of the elastic needles (5) is provided with the stopper (12) correspondingly.

3. The ejection mechanism for injection molds according to claim 2, characterized in that said stop (12) is provided in plurality, each of which can abut against at least one of said pogo pins.

4. The ejection mechanism for the injection mold according to claim 3, characterized in that a through hole (9) is provided in the row seat (3), the elastic needle (5) is slidably disposed through the through hole (9), the elastic member (6) is sleeved on the elastic needle (5), one end of the elastic member (6) abuts against the row seat (3), and the other end of the elastic member abuts against or is connected to the elastic needle (5).

5. The ejection mechanism for an injection mold according to claim 4, characterized in that the pogo pin (5) includes a first shaft section (51), a second shaft section (52), and a third shaft section (53), the second shaft section (52) having a larger shaft diameter than the first shaft section (51) and the third shaft section (53); the through hole (9) comprises a first hole section (91), a second hole section (92) and a third hole section (93), the aperture of the first hole section (91) is matched with the first shaft section (51), the aperture of the second hole section (92) is matched with the second shaft section (52), the aperture of the third hole section (93) is matched with the third shaft section (53), and the length of the second hole section (92) is larger than the axial size of the second shaft section (52).

6. The ejection mechanism for an injection mold according to claim 5, wherein the slide (3) comprises a slider (31) and a lower die (32), the lower die (32) and the slider (31) being removably connected, the first hole section (91) and the second hole section (92) being located in the slider (31), the third hole section (93) being located in the lower die (32); the lower die (32), the upper die (41) and the fixed die (42) enclose a die cavity.

7. The ejection mechanism for an injection mold as claimed in claim 6, wherein the elastic member (6) is fitted over the third shaft section (53) and located within the second hole section (92).

8. The ejection mechanism for injection molds according to claim 6, characterized in that the pogo pin (5) further comprises a fourth shaft section (54), the fourth shaft section (54) being located inside the lower mold (32), a shaft diameter of the fourth shaft section (54) being smaller than a shaft diameter of the third shaft section (53), the fourth shaft section (54) abutting against the product (8); the through hole (9) further comprises a fourth hole section (94), and the hole diameter of the fourth hole section (94) is matched with that of the fourth shaft section (54).

9. The ejection mechanism for an injection mold according to any one of claims 1 to 8, characterized in that the ejection mechanism further comprises a wear-resistant block (7), the wear-resistant block (7) is tightly arranged on the shovel base (1), the wear-resistant block (7) and the slide (3) are both provided with a second inclined surface (71) and have the same slope, and the wear-resistant block (7) and the slide (3) are in sliding fit.

10. Injection mould, characterized in that it comprises an ejection mechanism for an injection mould according to any one of claims 1-9.

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