CN115782090A - Thin-wall shell mold - Google Patents

Abstract

The invention provides a thin-wall shell mold which comprises an upper mold component and a lower mold component, wherein the upper mold component comprises an upper mold core component, the lower mold component comprises a lower mold core component, the upper mold core component comprises an upper mold core and a cover plate, a cavity penetrating to the top of the upper mold core is arranged on the upper mold core, the cover plate is arranged on the top of the upper mold core, the cover plate covers the top of the cavity, and the side wall of the cavity inclines towards the middle of the cavity; the lower mould kernel component comprises a lower mould kernel and a fixing plate, the lower mould kernel is provided with a mould core, the fixing plate is provided with a sleeving hole, the fixing plate is sleeved on the lower mould kernel through the sleeving hole, and the side wall of the mould core inclines towards the middle of the mould core. Can increase the distance between thin-walled shell product and die cavity, the core fast when the drawing of patterns, reduce adhesion time, avoid adhesion once more to reduce thin-walled shell's the drawing of patterns degree of difficulty, reduce the mar of inside and outside surface, improve the transmittance, strengthen transparent effect.

Description

Thin-wall shell mold

Technical Field

The invention relates to the field of mold equipment, in particular to a thin-wall shell mold.

Background

Many medications are packaged in medication boxes, and particularly medications in the form of pills are particularly suited for packaging using transparent medication boxes in which the pills are stacked while still allowing the transparent medication to be seen through and the pill contents to be seen. The medicine box is flat and rectangular as a whole and has the characteristic of high and thin as a whole. The medicine box is a thin-wall shell, and the thin-wall shell has a larger vertical surface due to the characteristics of flatness, height, thinness and the like during injection molding.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a thin-wall shell mold and an injection mold to solve the technical problem of the prior art that the mold release difficulty of the thin-wall shell is large.

One of the purposes of the invention is realized by adopting the following technical scheme:

a thin-wall shell mold comprises an upper mold assembly and a lower mold assembly, wherein the upper mold assembly comprises an upper mold core assembly, the lower mold assembly comprises a lower mold core assembly, the upper mold core assembly comprises an upper mold core and a cover plate, a cavity penetrating to the top of the upper mold core is formed in the upper mold core, the cover plate is arranged at the top of the upper mold core, the cover plate covers the top of the cavity, and the side wall of the cavity inclines towards the middle of the cavity;

the lower mold core component comprises a lower mold core and a fixing plate, the lower mold core is provided with a mold core, the fixing plate is provided with a sleeve hole, the fixing plate is sleeved on the lower mold core through the sleeve hole, and the side wall of the mold core inclines towards the middle of the mold core.

Optionally, a cavity is arranged in the lower die core, and a vent hole communicated with the cavity is formed in the top of the mold core;

the lower die assembly is provided with a demolding assembly, the demolding assembly comprises a first gas pipeline, and the first gas pipeline extends into the cavity.

Optionally, the drawing of patterns subassembly still include with the outlet duct of first gas pipeline intercommunication, the outlet duct stretches into be used for the shutoff to flow in the vent hole and mould, the outlet duct upper end with the air outlet clearance has between the vent hole, the upper end of outlet duct is sealed, be equipped with the side opening on the upper end lateral wall of outlet duct.

Optionally, the cavity is in a long hole shape, the demolding assembly further comprises a supporting tube, the supporting tube is arranged in the cavity, the upper end of the supporting tube abuts against the lower end of the air outlet tube, and the supporting tube is connected with the first air pipeline.

Optionally, a mounting groove for mounting the upper die core assembly is formed in the lower die assembly, a lower sealing groove corresponding to the cavity is formed in the bottom of the mounting groove, and a lower sealing ring is arranged in the lower sealing groove;

the lower extreme of stay tube is equipped with the clamping ring, the clamping ring supports and presses lower sealing washer.

Optionally, the lower end of the air outlet pipe extends into the cavity, and a ring protruding out of the outer circumferential surface of the air outlet pipe is arranged at the lower end of the air outlet pipe;

the demoulding assembly further comprises an elastic piece, the elastic piece is located above the circular ring, the lower end of the elastic piece is abutted to the circular ring, and the upper end of the elastic piece is abutted to the inner wall of the top of the cavity.

Optionally, the upper core assembly further comprises a second gas duct, the second gas duct partially extending into the cover plate;

the bottom of the cover plate is provided with a vent groove arranged around the cavity, and the vent groove is communicated with the second gas pipeline;

the bottom of the cover plate is provided with a forming surface which is positioned at the top of the cavity, and the bottom of the cover plate is also provided with a ventilation gap which extends from the ventilation groove to the forming surface.

Optionally, the thin-walled shell mold further comprises a lower cooling assembly, the lower cooling assembly comprises a lower cooling tube and a lower heat conducting member, one end of the lower heat conducting member is connected with the lower cooling tube, and the other end of the lower heat conducting member extends into the core.

Optionally, the thin-walled shell mold further comprises an upper cooling assembly, the upper cooling assembly comprises a cover plate cooling pipe and an upper cooling pipe, the cover plate cooling pipe extends into the cover plate, and the upper cooling pipe extends into the upper mold core.

Optionally, a positioning cavity is arranged at the bottom of the upper die core, and an upward protruding positioning protrusion is arranged on the fixing plate;

when the upper die assembly and the lower die assembly are assembled, the positioning bulge is embedded into the positioning cavity.

Compared with the prior art, the invention has the beneficial effects that:

the thin-wall shell mold has the angle inclined towards the middle of the cavity, so that the thin-wall shell can be separated from the cavity under the condition of slight demolding during demolding, and the thin-wall shell can be rapidly separated from the cavity; the side wall of the core has an angle inclined towards the middle of the core, and similarly, the thin-wall shell can be separated from the core under the condition of slight demoulding of the thin-wall shell, so that the separation speed of the thin-wall shell and the core is improved. When die cavity lateral wall and core lateral wall inclination, the thin wall casing can break away from with die cavity, core fast, reduces the adhesion time of thin wall casing product and die cavity, core, especially can reduce the relative movement that produces when the adhesion, and the distance between thin wall casing product and die cavity, the core increases along with the drawing of patterns, avoids thin wall casing product and die cavity, core to take place the adhesion once more, avoids or reduces the mar that the thin wall casing produced when the drawing of patterns. Therefore, in the embodiment, the distance between the thin-wall shell product and the cavity and the distance between the thin-wall shell product and the mold core can be quickly increased during demolding, the adhesion time is shortened, and secondary adhesion is avoided, so that the demolding difficulty of the thin-wall shell is reduced, scratches on the inner surface and the outer surface are reduced, the transmittance is improved, and the transparent effect is enhanced.

Drawings

FIG. 1 is a schematic perspective view of a thin-walled shell mold of the present invention;

FIG. 2 is a cut-away schematic view of the thin-walled shell mold of the present invention;

FIG. 3 is an exploded view of the thin-walled shell mold of the present invention;

FIG. 4 is an exploded view of the mold insert of the thin-walled housing mold of the present invention;

FIG. 5 is a schematic view of an outlet tube in the thin-walled shell mold of the present invention;

FIG. 6 is an enlarged view of a portion A of FIG. 2;

FIG. 7 is an enlarged view of a portion B of FIG. 2; .

In the figure:

1. a top plate;

2. upper template

3. An upper mold core assembly; 31. loading a mold core; 311. a cavity; 312. a cover plate groove; 313. a positioning cavity; 32. a cover plate; 321. a vent channel; 322. an upper seal groove; 33. a second gas conduit;

4. a base plate;

5. a lower template; 51. mounting grooves; 52. a lower seal groove;

6. a lower mold core assembly; 61. a lower die core; 611. a core; 612. a vent hole; 613. a cavity; 62. a fixing plate; 621. positioning a projection;

7. demolding the assembly; 71. a first gas conduit; 72. an air outlet pipe; 721. a circular ring; 722. side holes; 73. supporting a tube; 731. pressing a ring; 74. an elastic member;

8. a lower cooling assembly; 81. a lower cooling tube; 82. a lower heat conducting member.

Detailed Description

The present invention will be further described with reference to fig. 1 to 7 and the detailed description thereof, and it should be noted that, in the case of conflict, any combination of the embodiments or technical features described below may form a new embodiment.

As shown in fig. 1 and 2, the present invention provides a thin-walled housing mold for injection molding of a transparent thin-walled housing. The thin-wall shell die comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises a top plate 1, an upper die plate 2 and an upper die core assembly 3 arranged on the upper die plate 2, and the lower die assembly comprises a bottom plate 4, a lower die plate 5 and a lower die core assembly 6 arranged on the lower die plate 5.

The upper mold core assembly 3 includes an upper mold core 31 and a cover plate 32, the upper mold core 31 is provided with a cavity 311 penetrating through the top of the upper mold core 31, an upper opening of the cavity 311 is formed at the top of the upper mold core, the cover plate 32 is arranged at the top of the upper mold core 31, the cover plate 32 covers the top of the cavity 311, namely, the upper opening of the cavity 311 is covered, and the side wall of the cavity 311 inclines towards the middle of the cavity 311. The lower mold core assembly 6 comprises a lower mold core 61 and a fixing plate 62, the lower mold core 61 is provided with a mold core 611, the fixing plate 62 is provided with a sleeving hole, the fixing plate 62 is sleeved on the lower mold core 61 through the sleeving hole, and the side wall of the mold core 611 inclines towards the middle of the mold core 611.

After the thin-wall shell is injection molded, the thin-wall shell and the core 611 and the thin-wall shell and the cavity 311 are mutually closely adhered, and the thin-wall shell and the core 611 and the thin-wall shell and the cavity 311 are also easily adhered again due to secondary contact in the demolding process. In this embodiment, the side wall of the cavity 311 has an angle inclined toward the middle of the cavity 311, so that the thin-wall shell can be separated from the cavity 311 under the condition that the thin-wall shell is slightly demolded during demolding, and thus the thin-wall shell can be rapidly separated from the cavity 311; the side wall of the core 611 has an angle inclined towards the middle of the core 611, and similarly, under the condition that the thin-wall shell is slightly demoulded, the thin-wall shell can be separated from the core 611, so that the separation speed of the thin-wall shell from the core 611 is improved. When the side walls of the cavity 311 and the core 611 are inclined, the thin-wall shell can be quickly separated from the cavity 311 and the core 611, the adhesion time of the thin-wall shell product with the cavity 311 and the core 611 is shortened, particularly, the relative movement generated in adhesion can be shortened, the distance between the thin-wall shell product and the cavity 311 and the core 611 is increased along with the demolding, the thin-wall shell product is prevented from being adhered with the cavity 311 and the core 611 again, and scratches generated in the demolding process of the thin-wall shell are avoided or reduced. Therefore, in the embodiment, the distance between the thin-wall shell product and the cavity 311 and the distance between the thin-wall shell product and the core 611 can be increased rapidly during demolding, the adhesion time is shortened, and secondary adhesion is avoided, so that the demolding difficulty of the thin-wall shell is reduced, scratches on the inner surface and the outer surface are reduced, the transmittance is improved, and the transparent effect is enhanced.

Specifically, the side wall of the cavity 311 is inclined at an angle of 0.1 to 4 degrees.

Of course, in some further ranges, 0.2 to 2 degrees may be defined. Specific angles may be 0.2 degrees, 0.3 degrees, 0.4 degrees, 0.5 degrees, 0.6 degrees, 0.7 degrees, 0.8 degrees, 0.9 degrees, 1.1 degrees, 1.2 degrees, 1.3 degrees, 1.4 degrees, 1.5 degrees, 1.6 degrees, 1.7 degrees, 1.8 degrees, 1.9 degrees, 2 degrees, and other values between the foregoing example values.

Specifically, as shown in fig. 2 and 3, a cover plate groove 312 is formed in the top of the upper mold core 31, the shape of the cover plate groove 312 is matched with the shape of the cover plate 32, and the cover plate 32 is detachably fixed in the cover plate groove 312. Meanwhile, the cavity 311 penetrates up and down and to the bottom of the cover plate groove 312.

Of course, one, two or more than two cavities 311 may be provided in one upper core assembly 3, and correspondingly, one, two or more than two cores 611 may be provided in one lower core assembly 6.

In some embodiments of the lower core assembly 6, as shown in fig. 2 and 4, a cavity 613 is formed in the lower core 61, and a vent 612 is formed at the top of the core 611 and communicates with the cavity 613. A demoulding assembly 7 is arranged on the lower mould assembly, and the demoulding assembly 7 comprises a first gas pipeline 71, and the first gas pipeline 71 extends into the cavity 613. In this way, before demolding, gas is injected between the core 611 and the thin-walled shell through the first gas conduit 71, the cavity 613 and the vent hole 612 to fill a gap between the inner wall of the thin-walled shell and the core 611 with the gas, and before demolding movement, the distance between the core 611 and the inner wall of the thin-walled shell is increased, and relative sliding during adhesion is avoided or reduced.

Further, as shown in fig. 5 and 6, the demolding assembly 7 further includes an air outlet pipe 72 communicated with the first air pipe 71, the air outlet pipe 72 extends into the vent hole 612 for blocking the flow plastic, an air outlet gap is formed between the upper end of the air outlet pipe 72 and the vent hole 612, the upper end of the air outlet pipe 72 is closed, and a side hole 722 is formed in the side wall of the upper end of the air outlet pipe 72. The vent hole 612 is relatively porous, and fluid plastic in a high-temperature fluid state during injection molding easily enters the cavity 613 from the vent hole 612, so that the shape of the thin-walled shell is influenced, and the demolding difficulty of the thin-walled shell is increased. Therefore, in this embodiment, the air outlet pipe 72 is arranged to seal the flow molding, specifically, the upper end of the air outlet pipe 72 is sealed, an air outlet gap is reserved between the upper end of the air outlet pipe 72 and the vent hole 612, and the side holes 722 are arranged, so that the gas can flow out through the side holes 722, then enter the air outlet gap, flow out along the vent hole 612, and finally, along with the enhancement of the gas pressure, the gas fills between the inner wall of the thin-wall shell and the core 611, thereby avoiding or reducing scratches on the inner wall of the thin-wall shell caused by the core 611, and improving the transparency effect of the product.

The side hole 722 may be a single side hole 722, two side holes 722 arranged oppositely, or a plurality of side holes 722 distributed uniformly along the circumference of the outlet tube 72.

Specifically, the outlet gap may be an elongated groove that is provided on the surface of the outlet pipe 72 and extends in the axial direction. Of course, the outlet gap may also be an annular groove provided along the outer circumference of the upper end of the outlet pipe 72, the annular groove extending all the way to the end of the outlet pipe 72, or put another way, the diameter of the section where the outlet gap is located is smaller than the diameter of the outlet pipe 72.

Further, as shown in fig. 2 and 6, the cavity 613 is elongated, and the demolding assembly 7 further includes a support tube 73, wherein the support tube 73 is disposed in the cavity 613, and specifically, the cross-sectional shape of the support tube 73 is matched with the cross-sectional shape of the cavity 613. The upper end of the support pipe 73 abuts against the lower end of the air outlet pipe 72, and the support pipe 73 is connected with the first air pipe 71. In this embodiment, the upper end of the support tube 73 supports the air outlet tube 72, so that the air outlet tube 72 maintains a fixed position, and the air outlet tube 72 can be used for blocking the plastic flow during injection molding.

As shown in fig. 3, the lower mold assembly is provided with a mounting groove 51 for mounting the upper mold core assembly 3, specifically, the lower mold plate 5 is provided with a mounting groove 51, the bottom of the mounting groove 51 is provided with a lower sealing groove 52 corresponding to the cavity 613, specifically, the lower mold plate 5 is provided with a lower sealing groove 52. A lower seal ring is arranged in the lower seal groove 52. As shown in fig. 4, a pressing ring 731 is provided at the lower end of the support pipe 73, and the pressing ring 731 presses the lower seal ring. In this embodiment, a pressing ring 731 is disposed at the lower end of the supporting tube 73, and the pressing ring 731 and the lower sealing ring form a seal for the cavity 613, so as to prevent the gas flowing through the first gas pipe 71 and the supporting tube 73 from leaking, improve the stripping pressure of the gas, and improve the permeation pressure of the gas in the gas outlet gap.

Furthermore, the lower end of the outlet pipe 72 extends into the cavity 613, and the lower end of the outlet pipe 72 is provided with a ring 721 protruding from the outer circumferential surface of the outlet pipe 72. Demolding assembly 7 further includes a resilient member 74, wherein resilient member 74 is located above circular ring 721, a lower end of resilient member 74 abuts circular ring 721, and an upper end of resilient member 74 abuts the top inner wall of cavity 613. In this embodiment, the elastic member 74 applies pressure to the ring 721 to force the lower end of the outlet pipe 72, i.e. the ring 721, to press the support pipe 73, so as to prevent the outlet pipe 72 from protruding out of the core 611; in addition, under the elastic force of the elastic member 74, the air outlet pipe 72 can continuously apply pressure to the support pipe 73, so that the pressing ring 731 at the lower end of the support pipe 73 can continuously apply pressure to the lower sealing ring, and the sealing effect and the sealing continuity are improved.

Specifically, the elastic member 74 is a compression spring or an elastic rubber member.

Also, as for the aforementioned long hole-like cavity 613, the entire length is three sections, with the main portion of the cavity 613 being located in the middle for accommodating the support tube 73. The upper section of the cavity 613 has an inner diameter smaller than that of the main body portion for receiving the lower end of the outlet pipe 72 and the elastic member 74. The lower section of cavity 613 has an inner diameter greater than the inner diameter of the main body portion to accommodate pressure ring 731.

In some embodiments of the upper core assembly 3, as shown in fig. 3, the upper core assembly 3 further comprises a second gas conduit 33, the second gas conduit 33 extending partially into the cover plate 32. The bottom of the cover plate 32 is provided with a vent groove 321 surrounding the cavity 311, specifically, surrounding the upper opening of the cavity 311, and the vent groove 321 is communicated with the second gas pipe 33. The bottom of the cover plate 32 has a molding surface located at the top of the cavity 311, and the bottom of the cover plate 32 is further provided with a vent gap extending from the vent groove 321 to the molding surface. The vent groove 321 injects gas into the cavity 311 in the cavity 311 through the vent gap, and the gas fills the gap between the inner wall of the cavity 311 and the thin-wall shell under the action of higher gas pressure, so that the distance between the inner wall of the cavity 311 and the outer wall of the thin-wall shell is increased before demolding movement, and relative sliding generated during adhesion is avoided or reduced, thereby avoiding or reducing scratches generated by the inner wall of the cavity 311 on the outer wall of the thin-wall shell, and improving the transparent effect of the product.

Further, as shown in fig. 4 and 6, an upper seal groove 322 surrounding the vent groove 321 is provided at the bottom of the cover plate 32, and an upper seal ring is provided in the upper seal groove 322. When the lid 32 is mounted on the top of the upper mold core, the upper sealing ring seals the gap between the lid 32 and the upper mold core, specifically, the gap between the bottom of the lid 32 and the bottom of the lid groove 312, which surrounds the outer region of the vent groove 321. Thus, the leakage of the gas from the gas groove 321 is avoided or reduced, the mold release pressure of the gas is increased, and the permeation pressure of the gas in the gas passage gap is increased.

In some embodiments, as shown in fig. 4, the thin-walled shell mold further comprises a lower cooling assembly 8, wherein the lower cooling assembly 8 comprises a lower cooling pipe 81 and a lower heat conducting member 82, one end of the lower heat conducting member 82 is connected to the lower cooling pipe 81, and the other end of the lower heat conducting member extends into the core 611. Through cooling module 8 cooling rate of accelerating thin wall casing down, reduce injection moulding's cycle, improve production efficiency.

Specifically, the lower heat-conducting member 82 may be an aluminum pipe, a copper pipe, an aluminum sheet, a copper sheet, or the like

In some embodiments, the thin-walled shell mold further comprises an upper cooling assembly comprising cover plate 32 cooling tubes and upper cooling tubes, the cover plate 32 cooling tubes extending into the cover plate 32, and the upper cooling tubes extending into the upper core 31. Through last cooling module spare with higher speed the cooling rate of thin-walled shell, reduce injection moulding's cycle, improve production efficiency.

In some embodiments, as shown in fig. 4, the bottom of the upper mold core 31 is provided with a positioning cavity 313, and the fixing plate 62 is provided with a positioning protrusion 621 protruding upward. When the upper mold assembly and the lower mold assembly are closed, the positioning projection 621 is fitted into the positioning cavity 313. Through setting up location chamber 313 and location arch 621, improve the cooperation precision of touching benevolence and lower mould benevolence 61 on, improve the shaping precision of thin wall casing.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. A thin-wall shell mold comprises an upper mold assembly and a lower mold assembly, wherein the upper mold assembly comprises an upper mold core assembly, the lower mold assembly comprises a lower mold core assembly, and the thin-wall shell mold is characterized in that the upper mold core assembly comprises an upper mold core and a cover plate, a cavity penetrating to the top of the upper mold core is formed in the upper mold core, the cover plate is arranged at the top of the upper mold core, the cover plate covers the top of the cavity, and the side wall of the cavity inclines towards the middle of the cavity;

the lower mould kernel component comprises a lower mould kernel and a fixing plate, the lower mould kernel is provided with a mould core, the fixing plate is provided with a sleeving hole, the fixing plate is sleeved on the lower mould kernel through the sleeving hole, and the side wall of the mould core inclines towards the middle of the mould core.

2. The thin-walled shell mold of claim 1, wherein a cavity is provided in the lower mold core, and a vent hole communicated with the cavity is provided at the top of the mold core;

the lower die assembly is provided with a demolding assembly, the demolding assembly comprises a first gas pipeline, and the first gas pipeline extends into the cavity.

3. The thin-walled shell mold of claim 2, wherein the demolding assembly further comprises an air outlet pipe communicated with the first air pipeline, the air outlet pipe extends into the vent hole to seal the flow plastic, an air outlet gap is formed between the upper end of the air outlet pipe and the vent hole, the upper end of the air outlet pipe is closed, and a side hole is formed in the side wall of the upper end of the air outlet pipe.

4. The thin-walled shell mold of claim 3, wherein the cavity is elongated, and the stripper assembly further comprises a support tube disposed within the cavity, an upper end of the support tube abutting a lower end of the outlet tube, the support tube being connected to the first gas conduit.

5. The thin-walled shell mold of claim 4, wherein the lower mold component is provided with a mounting groove for mounting the upper mold core component, the bottom of the mounting groove is provided with a lower sealing groove corresponding to the cavity, and a lower sealing ring is arranged in the lower sealing groove;

the lower extreme of stay tube is equipped with the clamping ring, the clamping ring supports and presses lower sealing washer.

6. The thin-walled shell mold of claim 5, wherein the lower end of the outlet tube extends into the cavity, and the lower end of the outlet tube is provided with a ring protruding from the outer circumferential surface of the outlet tube;

the drawing of patterns subassembly still includes the elastic component, the elastic component is located the ring top, the lower extreme butt of elastic component the ring, the upper end butt of elastic component the top inner wall of cavity.

7. The thin-walled shell mold of claim 1, wherein the upper core assembly further comprises a second gas conduit, the second gas conduit partially extending into the cover plate;

the bottom of the cover plate is provided with a vent groove arranged around the cavity, and the vent groove is communicated with the second gas pipeline;

the bottom of the cover plate is provided with a forming surface which is positioned at the top of the cavity, and the bottom of the cover plate is also provided with a ventilation gap which extends from the ventilation groove to the forming surface.

8. The thin-walled casing mold of claim 1 further comprising a lower cooling assembly comprising a lower cooling tube and a lower thermally conductive member, the lower thermally conductive member having one end connected to the lower cooling tube and another end extending into the core.

9. The thin-walled shell mold of claim 1, further comprising an upper cooling assembly, the upper cooling assembly comprising a cover plate cooling tube and an upper cooling tube, the cover plate cooling tube extending into the cover plate and the upper cooling tube extending into the upper core.

10. The thin-walled shell mold according to claim 1, wherein the bottom of the upper mold core is provided with a positioning cavity, and the fixing plate is provided with a positioning protrusion protruding upwards;

when the upper die assembly and the lower die assembly are assembled, the positioning bulge is embedded into the positioning cavity.

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