CN210148608U - A secondary ejection injection mold - Google Patents

Abstract

The utility model discloses a secondary ejection injection mold, which comprises an upper mold and a lower mold, wherein the lower mold comprises a lower mold body, a lower mold base plate, a movable part and a plurality of thimbles; the lower die body is provided with a concave part for molding a product, and the ejector pin is used for ejecting the product; the lower die body is provided with a telescopic block which can stretch out of the end part of the lower die body in a protruding way, and the movable part is provided with a push rod; when the part of the telescopic block protruding out of the end part of the lower die body is pushed by the push rod, the lower die body can move; the end part of the lower die base plate is provided with a lug, and the lug and the telescopic block are respectively provided with a first inclined plane and a second inclined plane; when the telescopic block rises relative to the convex block, the first inclined plane presses against the second inclined plane, the telescopic block retracts, and the telescopic block is separated from the push rod. Realize that the secondary is ejecting through single moving part, lower mould body, lug and flexible piece, be applicable to the mould that has darker die cavity, under moving part, lower mould body, lug and flexible piece interact, make the working of plastics realize automatic drawing of patterns, both practiced thrift manufacturing cost, greatly guaranteed the working of plastics quality.

Description

A secondary ejection injection mold

technical field

The utility model relates to a mold, in particular to a secondary ejection injection mold.

Background technique

In the existing demolding technology, most of them use a single movable part to realize single ejection, with simple structure and simple action; When the product is removed, automatic demolding cannot be realized, which not only wastes manpower and material resources, but also increases the production cost. For some plastic parts with deep cavity structure, forcibly ejecting them at one time will have a great impact on the quality of the products.

Utility model content

In order to overcome the deficiencies of the prior art and solve the problem that the quality of the ejected products in the prior art is poor, the technical scheme adopted by the present utility model is:

A secondary ejection injection mold, comprising an upper mold and a lower mold, the lower mold includes a lower mold body, a lower mold base plate, and a movable part arranged in sequence; the lower mold body is provided with a concave part for molding a product, and the movable part A number of thimbles are arranged, the lower mold base plate and the lower mold body are both provided with through holes for accommodating the ejector pins, the through holes of the lower mold body are connected to the cavity, and the ejector pins are used to eject the product; the lower mold body is provided with a protruding out The telescopic block at its end, and the end of the movable piece corresponding to the telescopic block is provided with a push rod; when the part of the telescopic block protruding from the end of the lower mold body is pushed by the push rod, the lower mold body can move; the lower mold base plate The end of the corresponding telescopic block is provided with a convex block, and the convex block and the telescopic block are respectively provided with a first inclined surface and a second inclined surface; when the telescopic block rises relative to the convex block, the pressing force of the first inclined surface on the second inclined surface is used to drive the telescopic block to return. The telescopic block is released from the push rod.

According to another specific embodiment of the present invention, it further includes an insert for forming the concave portion of the product, the upper end of the insert is connected to the cavity, and the lower end of the insert is connected to the lower mold base plate; the lower mold body rises , the connection of the lower mold base plate to the insert is used to control the insert from the cavity.

According to another specific embodiment of the present utility model, further, the movable part includes an upper plate and a lower plate that are detachably connected; the disassembly of the upper plate and the lower plate is used for disassembling and assembling the ejector pin; the upper plate and the lower plate When the board is disassembled, the thimble can be pulled away from the upper board and the lower board.

According to another specific embodiment of the present invention, further, a first inclined plane and a chute are arranged side by side on the side of the bump close to the lower mold base plate; the chute is used for accommodating the push rod to slide up and down, The chute is also used to control the directional sliding of the push rod.

According to another specific embodiment of the present invention, further, an elastic member is provided on the lower die body, and the elastic member is used to drive the retractable block to protrude and reset.

According to another specific embodiment of the present invention, further, the lower mold body includes a floating plate and a lower mold core, and the upper mold includes an upper mold core; when the upper mold core and the lower mold core are attached, the two Surrounding cavity.

According to another specific embodiment of the present invention, further, the lower mold body is provided with a cooling flow channel, the cooling flow channel partially surrounds the concave portion, and the cooling flow channel is used for flowing a cooling medium.

According to another specific embodiment of the present invention, further, the lower die body includes a floating plate and a lower die core, the upper end of the floating plate is provided with a concave hole for accommodating the lower die core, and the concave portion is provided on the lower die core ; The input port and output port of the cooling channel are arranged on the side wall of the floating plate, and the cooling channel includes an input section, a surrounding section and an output section that are connected in sequence. The mold core is used to surround the recess.

According to another specific embodiment of the present invention, further, the connection position between the input section and the surrounding section and the connection position between the surrounding section and the output section are provided with sealing rings.

The injection mold for secondary ejection adopted by the utility model has the following beneficial effects and realizes secondary ejection through a single movable part, a lower mold body, a convex block and a telescopic block, and is suitable for a mold with a deep cavity. Under the interaction of a single movable part, the lower mold body, the convex block and the telescopic block, the plastic parts can be automatically demolded, which not only saves the production cost, but also greatly guarantees the quality of the plastic parts.

Description of drawings

Fig. 1 is the sectional view of the utility model mould;

Fig. 2 is the structural representation of the lower die of the utility model;

3 is a cross-sectional view of the first cutting position of the lower die of the present invention;

Fig. 4 is the sectional view of the second cutting position of the lower die of the utility model;

FIG. 5 is a flow chart of the lower die action of the present invention.

Detailed ways

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , a secondary ejection injection mold includes an upper mold 1 and a lower mold 2 , and the upper mold 1 includes an upper mold fixing plate 11 and an upper mold core 12 . As shown in FIG. 1 to FIG. 5 , the lower mold 2 includes a lower mold body 21, a lower mold base plate 22, and a movable member 23 arranged in sequence; the lower mold body 21 includes a floating plate 21a and a lower mold core, and the lower mold core is connected to the upper mold core. When the mold core 12 is closed, the cavity is formed. The lower mold body 21 is provided with a concave portion for molding the product 3, a plurality of ejector pins 24 are arranged on the movable part 23, the lower mold base plate 22 and the lower mold body 21 are both provided with through holes for accommodating the ejector pins 24, and the through holes of the lower mold body 21 are provided. The hole is connected to the cavity, and the ejector pin 24 is used to eject the product 3; the lower die body 21 is provided with a telescopic block 25 that can protrude out of its end, and the end of the movable piece 23 corresponding to the telescopic block 25 is provided with a push rod 26 When the part of the telescopic block 25 protruding from the end of the lower die body 21 is pushed by the push rod 26, the lower die body 21 can move; 27 and the telescopic block 25 are respectively provided with a first inclined plane 27a and a second inclined plane 25a; when the telescopic block 25 rises relative to the convex block 27, the pressing of the first inclined plane 27a against the second inclined plane 25a is used to drive the telescopic block 25 to retract, and the telescopic block 25 disengages the push rod 26.

In the injection molding machine, the lower mold 2 is connected to the frame through a guide structure, such as guide rods, guide grooves, and guide rails. The lower mold 2 is connected with a first sliding force member, which is used to drive the lower mold 2 away from the upper mold 1 ; the first sliding force member is mainly connected to the lower mold base plate 22 . When the first sliding force member drives the lower mold base plate 22 to slide, it drives the lower mold body 21 to move based on the friction between the product 3, the ejector pin 24, the insert 28, the push rod 26, etc.; or, the first inclined surface 27a drives the second slope 25a to move down.

The movable member 23 is connected with a second sliding power member, and the second sliding power member is used to drive the movable member 23 to slide. Both the first sliding power member and the second sliding power member can be air cylinders or hydraulic cylinders; or motors and other transmission structures, such as screw nut pairs and crank slider structures.

It also includes an insert 28 (core) for forming the concave part of the product 3. The upper end of the insert 28 is connected to the cavity, and the lower end of the insert 28 is connected to the lower mold base plate 22; when the lower mold body 21 rises, the lower mold base plate The connection 22 to the insert 28 is used to control the disengagement of the insert 28 from the cavity. A mounting plate for fixing the insert is provided on the lower mold base plate 22 . As shown in the figures, the portion of the insert 28 for forming the recess of the product is smaller, and the middle portion thereof is larger; part of the ejector pin passes through.

The movable part 23 includes an upper plate 23a and a lower plate 23b that are detachable and connected; the upper plate 23a and the lower plate 23b are disassembled for disassembling and assembling the ejector pin 24; when the upper plate 23a and the lower plate 23b are disassembled, the ejector pin 24 can be withdrawn away from the upper plate 23a and the lower plate 23b.

A first inclined surface 27a and a sliding groove 27b are arranged side by side on the side of the convex block 27 close to the lower mold base plate 22; slip.

The lower die body 21 is provided with an elastic piece, and the elastic piece is used to drive the telescopic block 25 to protrude and reset. The elastic member can be a spring, a disc spring, elastic plastic, or other elastic materials.

The lower die body 21 includes a floating plate 21a and a lower die core 21b, and the upper die 1 includes an upper die 1 core; when the upper die 1 core and the lower die core 21b are attached, they enclose a cavity.

The lower mold body 21 is provided with a cooling flow channel, the cooling flow channel partially surrounds the concave portion, and the cooling flow channel is used for flowing a cooling medium.

The lower die body 21 includes a floating plate 21a and a lower die core 21b, the upper end of the floating plate 21a is provided with a concave hole for accommodating the lower die core 21b, and the concave portion is set on the lower die core 21b; the input port and output of the cooling channel are The port is arranged on the side wall of the floating plate 21a, and the cooling flow channel includes an input section, a surrounding section and an output section which are connected in sequence. recess. As shown in FIG. 3 , the connection position between the input section and the surrounding section and the connection position between the surrounding section and the output section are all provided with sealing rings. The input direction of the cooling medium is the V1 direction as shown in Figures ₂ and 3, and the output direction of the cooling medium is the V2 direction shown in Figures ₂ and 3.

As shown in FIG. 1 and FIG. 5 , an injection molding method includes steps a to f. In step a, the upper mold 1 and the lower mold 2 are closed, and the material is injected into the cavity; in step b, the lower mold 2 is kept away from the upper mold 1; The protruding part of the telescopic block 25 is pushed out from the end of the lower mold body 21, the lower mold base plate 22 is suspended, the lower mold body 21 drives the product 3 to rise synchronously, and the insert 28 gradually separates from the product 3; Step d, the lower mold body 21 rises After the height of H1, the first inclined surface 27a of the bump 27 connected to the lower mold base plate 22 presses against the second inclined surface 25a of the telescopic block 25. While the telescopic block 25 is gradually retracted into the lower mold body 21, the lower mold body 21 and the thimble 24 continues to rise; step e, the telescopic block 25 is retracted in place, the telescopic block 25 is separated from the push rod 26, the movable piece 23 drives the ejector pin 24 to continue to rise, and the ejector pin 24 pushes the product 3 out of the lower die body 21 gradually; step f, the product 3 is taken out. After leaving, the lower mold base plate 22 and the lower mold body 21 rise;

When the lower mold base plate 22 stops rising, the second inclined surface 25a is separated from the first inclined surface 27a, and the elastic member drives the telescopic block 25 to be in a protruding state;

During the rising process of the lower mold base plate 22, the lower mold body 21 rises by the frictional force of the insert 28 and/or the push rod 26, the lower mold body 21 is firstly attached to the upper mold 1, and then the lower mold base plate 22 continues to rise, and the telescopic block 25 gradually rises. Or, during the rising process of the lower mold base 22, the lower mold base 22 is raised relative to the lower mold body 21, the telescopic block 25 is gradually protruded and reset, and then the lower mold base 22 pushes the lower mold body 21 to rise.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial direction", "circumferential direction", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying the indicated device. Or the elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integration; it can be mechanical connection, electrical connection or communication with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction relationship between the two elements , unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be included within the scope of the technical solutions of the present invention.

Claims (9)

1. A secondary ejection injection mold, characterized in that: it comprises an upper mold (1) and a lower mold (2), and the lower mold (2) includes a lower mold body (21), a lower mold base plate ( 22), a movable part (23); the lower mold body (21) is provided with a concave portion for molding the product (3), the movable part (23) is provided with a number of thimbles (24), the lower mold base plate (22) and the lower mold body (21) are provided with through holes for accommodating the ejector pins (24), the through holes of the lower mold body (21) are connected to the cavity, and the ejector pins (24) are used to eject the product (3); the lower mold body (21) There is a telescopic block (25) that can protrude out of its end, and the end of the movable piece (23) corresponding to the telescopic block (25) is provided with a push rod (26); When the end part of the die body (21) is pushed by the push rod (26), the lower die body (21) can move; the end part of the lower die base plate (22) corresponding to the telescopic block (25) is provided with a bump (27) , the convex block (27) and the telescopic block (25) are respectively provided with a first inclined plane (27a) and a second inclined plane (25a); when the telescopic block (25) rises relative to the convex block (27), the first inclined plane (27a) is opposite to the first inclined plane (27a). The pressing of the two inclined surfaces (25a) is used to drive the telescopic block (25) to retract, and the telescopic block (25) is separated from the push rod (26). 2. A secondary ejection injection mold according to claim 1, characterized in that: it further comprises an insert (28) for forming the concave portion of the product (3), and the upper end of the insert (28) is connected to the In the cavity, the lower end of the insert (28) is connected to the lower mold substrate (22); when the lower mold body (21) rises, the connection of the lower mold substrate (22) to the insert (28) is used to control the insert (28) out of the cavity. 3. The injection mold for secondary ejection according to claim 1 or 2, wherein the movable part (23) comprises an upper plate (23a) and a lower plate (23b) that are detachable and connected. ; The disassembly of the upper plate (23a) and the lower plate (23b) is used to disassemble and assemble the ejector pin (24); when the upper plate (23a) and the lower plate (23b) are disassembled, the ejector pin (24) can be pulled away from the upper plate (23a) ) and the lower plate (23b). 4 . The injection mold for secondary ejection according to claim 1 , wherein a side of the bump ( 27 ) close to the lower mold base plate ( 22 ) is provided with a first slope ( 27 a ) side by side. 5 . ) and a chute (27b); the chute (27b) is used for accommodating the push rod (26) to slide up and down, and the chute (27b) is also used to control the directional sliding of the push rod (26). 5. A secondary ejection injection mold according to claim 1 or 4, characterized in that: the lower mold body (21) is provided with an elastic member, and the elastic member is used to drive the telescopic block (25) to protrude stretch reset. 6. A secondary ejection injection mold according to claim 1 or 2, characterized in that: the lower mold body (21) comprises a floating plate (21a) and a lower mold core (21b), and the upper mold (1) The upper mold (1) kernel is included; when the upper mold (1) kernel and the lower mold kernel (21b) fit together, the two enclose a cavity. 7. A secondary ejection injection mold according to claim 1 or 2, characterized in that: the lower mold body (21) is provided with a cooling flow channel, the cooling flow channel partially surrounds the concave portion, and the cooling flow channel For flowing cooling medium. 8. A secondary ejection injection mold according to claim 7, wherein the lower mold body (21) comprises a floating plate (21a) and a lower mold core (21b), and the floating plate (21a) ) is provided with a concave hole for accommodating the lower die core (21b), and the concave part is provided on the lower die core (21b); the input port and the output port of the cooling channel are arranged on the side wall of the floating plate (21a), and the cooling channel includes The input section, the surrounding section and the output section are connected in sequence. The input section and the output section are all arranged on the floating plate (21a), and the surrounding section is arranged on the lower die core (21b) and used to surround the recess. 9 . The injection mold for secondary ejection according to claim 8 , wherein the connection position between the input section and the surrounding section and the connection position between the surrounding section and the output section are provided with sealing rings. 10 .

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