CN217395595U - Injection mold for back-off demolding - Google Patents

Abstract

The utility model provides an injection mold for back-off demolding, which comprises an upper mold, a lower mold and a demolding mechanism; the upper die comprises: the device comprises a plate A, an upper mold core embedded in the plate A and a bearing plate arranged above the plate A; the lower die comprises: the lower die core is embedded in the plate B; the demolding mechanism comprises: the elastic plate is arranged between the bearing plate and the plate A and can move up and down, and the inclined elastic insert is connected with the elastic plate; an upper mold core insert is arranged in the upper mold core, and the inclined elastic insert is embedded into the upper mold core insert through an insert groove matched with the upper mold core insert; forming cavities are formed between the upper die core and the lower die core, and when the die is opened, the product formed by reversely buckling the inclined elastic insert moves downwards to realize reverse buckling and demoulding; the utility model is suitable for being used when the space is not enough by arranging the inclined elastic insert to back-off the product; stability, flexibility are strong, and production efficiency is high to compare the drawing of patterns mode of oblique top and interior line bit architecture, required drawing of patterns space is still less.

Description

Injection mold of back-off drawing of patterns

Technical Field

The utility model relates to an injection mold technical field, more specifically the injection mold of back-off drawing of patterns that says so.

Background

The mold is widely used in industrial production, the mold is various molds and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods, the injection mold is often used for producing plastic products such as mobile phone shells, earphone charging box shells and the like, and the injection mold is used for injecting heated and melted materials into a mold cavity from high pressure, and obtaining formed products after cooling and solidification; because the structure of present plastic products is more and more complicated, demoulding mechanisms are often needed to be used in moulds for producing the products, common demoulding modes comprise back-off demoulding, pitched roof demoulding, thread demoulding and the like, along with the increasing and more complicated product structure, the existing demoulding mechanisms are easily blocked by buckles during demoulding, forced demoulding easily damages the products, the demoulding mechanisms in most of present injection moulds have some defects in design, the demoulding mechanisms cause the mould to move unsmoothly, the defects of poor positioning precision, low production efficiency, high maintenance cost and the like are often existed, especially, the demoulding mechanisms with few front mould back-off parts have insufficient demoulding space, pitched roof and internal positions cannot be made, the buckle positions can be pulled to be damaged by forced demoulding, and the production requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an injection mold of back-off drawing of patterns.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an injection mold for back-off demolding comprises an upper mold, a lower mold and a demolding mechanism; the upper die comprises: the upper die core is embedded in the plate A, and the bearing plate is arranged above the plate A; the lower die comprises: the lower die core is embedded in the plate B; the demolding mechanism comprises: the elastic plate is arranged between the bearing plate and the plate A and can move up and down, and the inclined elastic insert is connected with the elastic plate; an upper mold core insert is arranged in the upper mold core, and the inclined elastic insert is embedded into the upper mold core insert through an insert groove matched with the upper mold core insert; and forming cavities are formed between the upper die core and the lower die core, and when the die is opened, a product formed by reversely buckling the inclined elastic insert moves downwards to realize reverse buckling and demoulding.

In the preferred technical scheme, the slant elastic insert consists of two inserts which are bilaterally symmetrical, the two inserts are in a slant structure and are embedded into the slant elastic insert through an opening on the elastic plate, and a pressing block is arranged above the slant elastic insert; the inclined elastic insert realizes the back-off of the product through the outer sides of the bottoms of the two inserts.

In the preferred technical scheme, the top of the upper mold core insert is provided with a mold core insert pressing block for connecting the upper mold core.

In the preferred technical scheme, a forming part is embedded in the upper mold core insert.

In the preferred technical scheme, the elastic plate is at least provided with two needle grooves, and the needle grooves are provided with reset needles; the upper part of the reset needle is embedded into the elastic plate through the needle groove, the lower part of the reset needle penetrates through the upper die core, and the bottom of the reset needle is abutted against the upper surface of the lower die core.

In the preferred technical scheme, at least two middle support washers are embedded into the bottom of the spring plate, and the top of each middle support washer is connected with the bearing plate.

In the preferred technical scheme, a plurality of spring positioning needles are embedded in the bottom of the spring plate, and the tops of the spring positioning needles are connected with the bearing plate.

In the preferred technical scheme, the spring positioning needle is sleeved with a spring, and the upper end and the lower end of the spring are respectively contacted with the bearing plate and the elastic plate.

Known through foretell technical scheme, compare with prior art, the utility model discloses following beneficial technological effect has:

the utility model is suitable for being used when the space is not enough by arranging the inclined elastic insert to back-off the product; when the mold is opened, the B plate and the lower mold core move downwards, the elastic plate moves downwards to push the inclined elastic insert to move downwards to realize back-off demolding, the stability and the flexibility are high, the production efficiency is high, and in addition, compared with a demolding mode with an inclined top structure and an inner slide structure, the required demolding space is less.

Drawings

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

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is a schematic view of a partial structure of the present invention.

Fig. 3 is a schematic perspective view of the canted spring insert.

Reference numerals: 120. a, a plate; 110. a carrier plate; 130. an upper die core; 210. b, plate; 220. a lower die core; 310. a spring plate; 320. obliquely bouncing the insert; 140. an upper mold core insert; 141. an insert pocket; 230. A molding cavity; 330. briquetting; 150. pressing the mold core insert; 160. a forming member; 311. a reset needle; 312. a middle support; 313. a spring locator pin; 314. a spring.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1-3, the injection mold for producing earphone shell in this embodiment of the present invention is an injection mold for producing earphone shell, but the product that can be produced by the present invention is not limited to this embodiment; the utility model comprises an upper die, a lower die and a demoulding mechanism; the upper die comprises: the supporting structure comprises an A plate 120, a supporting plate 110 and an upper mold core 130, wherein the upper mold core 130 is signed in the A plate 120, and the supporting plate 110 is arranged above the A plate 120; the lower die comprises a B plate 210 and a lower die core 220, and the lower die core 220 is embedded and fixed in the B plate 210; the demoulding mechanism is provided with an elastic plate 310, the elastic plate 310 is arranged in an elastic plate groove formed between the bearing plate 110 and the A plate 120, and the elastic plate 310 can move up and down in the elastic plate groove; the elastic plate 310 is connected with an inclined elastic insert 320, an upper core insert 140 is arranged in the upper core 130, an insert groove 141 matched with the inclined elastic insert 320 is formed in the upper core insert 140, the top of the inclined elastic insert 320 is fixed on the elastic plate 310, and the bottom of the inclined elastic insert 320 is embedded in the upper core insert 140 through the insert groove 141; a molding cavity 230 is formed between the upper mold core 130 and the lower mold core 220, the earphone shell produced by the utility model is injection molded in the molding cavity 230, and a groove body, a flow channel and the like for molding are also arranged in the molding cavity 230 under general conditions, but the groove body, the flow channel and the like are the prior art and are not described in more detail, and the drawing is not shown; when the product is molded in the molding cavity 230 and then the mold is opened, the elastic plate 310 drives the inclined elastic insert 320 to move downwards to realize the inverted demolding.

Furthermore, the slant spring insert 320 is composed of two inserts which are symmetrical left and right, the two inserts are in a slant structure and are embedded into the slant spring insert 310 through an opening on the spring plate 310, a pressing block 330 is arranged above the slant spring insert 320, and the pressing block 330 fixes the slant spring insert 320 to move along with the movement of the spring plate 310; the inclined elastic insert 320 realizes the reverse buckling of the product through the outer sides of the bottoms of the two inserts, and the inclined elastic structure is suitable for a demoulding mode with small demoulding space.

Furthermore, a mold core insert pressing block 150 for connecting the upper mold core 130 is arranged at the top of the upper mold core insert 140, a forming member 160 is embedded in the upper mold core insert 140, the mold core insert pressing block 150 presses the upper mold core insert 140 and the forming member 160, the forming member 160 is located between the two inserts of the inclined elastic insert 320, the forming member 160 is used for forming a product, and the inserts arranged at two sides of the forming member 160 are simultaneously turned over when the product is formed.

Furthermore, two sides above the springboard 310 are respectively provided with a needle slot, the number of the needle slots is not limited to this embodiment, and the needle slots are provided with the reset needles 311; the upper part of the reset needle 311 is embedded into the elastic plate 310 through a needle groove, the lower part of the reset needle penetrates through the upper mold core 130, and the bottom of the reset needle is propped against the upper surface of the lower mold core 220; when the mold is opened, the B plate 210 and the lower mold core 220 move downwards, and the elastic plate 310 drives the inclined elastic insert 320 to move downwards to realize back-off demolding; when the mold is closed, the lower mold core 220 moves upwards, the reset needle 311 at the bottom of the lower mold core 220, which is opposite to the upper surface of the lower mold core 220, is pressed upwards, and the reset needle 311 moves upwards to reset the elastic plate 310 upwards.

Furthermore, two middle supporting parts 312 are embedded in the bottom of the spring plate 310, the number of the middle supporting parts is not limited to this embodiment, the top of the middle supporting part 312 is connected with the carrier plate 110, and the middle supporting part 312 plays a positioning and guiding role on the spring plate 310, so that the spring plate 310 can move up and down more stably; the bottom of the elastic plate 310 is embedded with three spring positioning pins 313, the number of the spring positioning pins 313 is not limited to the embodiment, and the tops of the spring positioning pins 313 are connected with the carrier plate 110; the spring 314 is sleeved on the spring positioning pin 313, the upper end and the lower end of the spring 314 are respectively contacted with the bearing plate 110 and the elastic plate 310, when the mold is opened, the B plate 210 and the lower mold core 220 move downwards, and the elastic plate 310 is pushed to automatically move downwards under the action of the spring 314 due to the fixed bearing plate 110, so that the spring 320 can be driven to move downwards to complete the back-off demolding.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. An injection mold for back-off demolding comprises an upper mold, a lower mold and a demolding mechanism; the method is characterized in that: the upper die comprises: the device comprises an A plate (120), an upper die core (130) embedded in the A plate (120) and a bearing plate (110) arranged above the A plate (120); the lower die comprises: a board B (210) and a lower mold core (220) embedded in the board B (210); the demolding mechanism comprises: the elastic plate (310) is arranged between the bearing plate (110) and the A plate (120) and can move up and down, and the inclined elastic insert (320) is connected with the elastic plate (310); an upper mold core insert (140) is arranged in the upper mold core (130), and the inclined elastic insert (320) is embedded into the upper mold core insert (140) through an insert groove (141) which is arranged on the upper mold core insert (140) and matched with the inclined elastic insert; a molding cavity (230) is formed between the upper mold core (130) and the lower mold core (220), and when the mold is opened, a product which is formed by back-off molding through the inclined elastic insert (320) moves downwards to realize back-off demolding.

2. The injection mold of claim 1, wherein: the slant elastic insert (320) consists of two inserts which are bilaterally symmetrical, the two inserts are of slant structures and are embedded into the slant elastic insert (320) through an opening on the elastic plate (310), and a pressing block (330) is arranged above the slant elastic insert (320); the inclined elastic insert (320) realizes back-off of the product through the outer sides of the bottoms of the two inserts.

3. The injection mold of claim 1, wherein: the top of the upper mould core insert (140) is provided with a mould core insert pressing block (150) connected with the upper mould core (130).

4. The injection mold of claim 1, wherein: the upper mold core insert (140) is embedded with a forming part (160).

5. The injection mold of claim 1, wherein: the elastic plate (310) is provided with at least two needle grooves, and the needle grooves are provided with reset needles (311); the upper part of the reset needle (311) is embedded into the elastic plate (310) through the needle groove, the lower part of the reset needle penetrates through the upper die core (130), and the bottom of the reset needle is propped against the upper surface of the lower die core (220).

6. The injection mold of claim 1, wherein: the bottom of the elastic plate (310) is embedded with at least two middle supports (312), and the top of the middle supports (312) is connected with the carrier plate (110).

7. The injection mold of claim 1, wherein: a plurality of spring positioning pins (313) are embedded in the bottom of the elastic plate (310), and the tops of the spring positioning pins (313) are connected with the bearing plate (110).

8. The injection mold of claim 7, wherein: the spring positioning needle (313) is sleeved with a spring (314), and the upper end and the lower end of the spring (314) are respectively contacted with the bearing plate (110) and the elastic plate (310).

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