CN112622183B

CN112622183B - Door frame forming die and forming process thereof

Info

Publication number: CN112622183B
Application number: CN202011408830.XA
Authority: CN
Inventors: 顾鸣
Original assignee: Courage Mould Plastic Suzhou Co ltd
Current assignee: Courage Mould Plastic Suzhou Co ltd
Priority date: 2020-12-05
Filing date: 2020-12-05
Publication date: 2022-05-03
Anticipated expiration: 2040-12-05
Also published as: CN112622183A

Abstract

The application relates to the field of injection molds, in particular to a door frame forming mold which comprises a first half mold and a second half mold, wherein the first half mold and the second half mold surround a forming cavity, a first movable module and a second movable module are arranged in a surrounding ring of the forming cavity on the first half mold, the first movable module and the second movable module participate in surrounding the inner side wall of the forming cavity, a first inclined rod and a second inclined rod are arranged on the second half mold, a first inclined hole matched with the first inclined rod is arranged on the first movable module, and a second inclined hole matched with the second inclined rod is arranged on the second movable module; the first movable module and the second movable module are enclosed to form a groove, the second half module is provided with a protruding part matched with the groove in the process of die assembly, push plates pushed by a driving mechanism are arranged on the inner side wall of the groove in pairs, and the push plates are used for pushing and pressing the side surfaces of the protruding part and the two push plates in each pair are opposite in pushing direction. The problem of leave the seam between down tube outer wall and the inclined hole inner wall and lead to product size to change has been solved in this application, has improved production quality.

Description

Door frame forming die and forming process thereof

Technical Field

The application relates to the field of injection molds, in particular to a door frame forming mold and a forming process thereof.

Background

The injection mold is divided into a thermosetting plastic mold and a thermoplastic plastic mold according to the molding characteristics; according to the forming process, the method is divided into a transfer mold, a blow mold, a cast mold, a hot forming mold, a hot pressing mold (compression mold), an injection mold and the like, wherein the hot pressing mold can be divided into a flash type, a semi-flash type and a non-flash type by a flash mode, and the injection mold can be divided into a cold runner mold and a hot runner mold by a pouring system; the loading and unloading mode can be divided into a movable mode and a fixed mode.

After the upper die and the lower die of the original injection mold are closed, the upper die and the lower die are only stabilized and positioned by the guide post of the mold, the inclined rod is additionally arranged in the injection mold along with the continuous improvement of the requirement on the production efficiency, and the action of the inclined rod refers to the straight rod mentioned in the patent with the authorization publication number of CN 211101526U. When the die is closed, the inclined rod drives the movable module and the rest part of the die to jointly enclose a die cavity; when the mold is opened, the inclined rod drives the movable module to be separated from the molded product, so that the product can be rapidly demoulded.

Generally, the included angle between the diagonal rod and the guide post is an acute angle, and when the mold is opened, the two half molds move along the length direction of the guide post; the movable module is usually moved along the length direction of the movable module in the direction perpendicular to the guide post. The diagonal rod is fittingly inserted into the diagonal hole on the movable module, but the diagonal rod and the movable module are not strictly matched in a threaded manner. In order to prevent the inclined rod from being locked in the inclined hole and to make the inclined rod slide relatively to the inner wall of the inclined hole quickly and smoothly in consideration of factors such as machining precision, matching precision and abrasion after matching operation of the inclined rod and the inclined hole, a gap needs to be reserved between the outer wall of the inclined rod and the inner wall of the inclined hole for oil injection, and an annular lubricating oil layer needs to be formed.

Fig. 1 is a square plastic door frame of a refrigerator customized by a customer, the customer has a high requirement on the dimensional accuracy of the product, the remaining seam is favorable for the movable module to slide on the diagonal rod, but the inner wall of a cavity defined by the movable module deviates, so that the local size of the product is changed.

Disclosure of Invention

In order to solve the problem that the gap is left between the inclined rod outer wall and the inclined hole inner wall to lead to the size change of a product, the application provides a door frame forming die and a forming process thereof.

First aspect, this application provides a door frame forming die, adopts following technical scheme:

a door frame forming die comprises a first half die and a second half die which surround a forming cavity, wherein a first movable module and a second movable module are arranged in a surrounding ring of the forming cavity on the first half die, the first movable module and the second movable module participate in surrounding the inner side wall of the forming cavity, a first inclined rod and a second inclined rod are arranged on the second half die, a first inclined hole matched with the first inclined rod is formed in the first movable module, and a second inclined hole matched with the second inclined rod is formed in the second movable module; the first movable module and the second movable module are enclosed to form a groove, the second half module is provided with a protruding part matched with the groove in the process of die assembly, push plates pushed by a driving mechanism are arranged on the inner side wall of the groove in pairs, and the push plates are used for pushing and pressing the side surfaces of the protruding part and the two push plates in each pair are opposite in pushing direction.

By adopting the technical scheme, a gap is normally reserved between the outer wall of the inclined rod and the inner wall of the inclined hole, and the driving mechanism is utilized to control the push plates to stretch out during die assembly, so that all the push plates are abutted against the side surface of the protruding part, and therefore the first movable module and the second movable module reach accurate positions under the action of reaction force, and the size of a cavity enclosed by the first movable module and the second movable module is accurate.

Optionally, a concave pit for inserting the push plate is arranged on the side surface of the convex part.

By adopting the technical scheme, in order to conveniently demold the die, the side surface of the protruding part is generally designed into the inclined surface, and the push plate is propped against the inclined surface to be easy to slip, so that the concave pit is designed on the side surface of the protruding part for the push plate to be pushed in.

Optionally, the driving mechanism includes a telescopic cylinder, and the push plate is fixed on a piston rod of the telescopic cylinder.

By adopting the technical scheme, all the push plates can be controlled to extend out or retract simultaneously.

Optionally, the four corners of the first half module are respectively provided with a fixing seat, two adjacent side faces of the fixing seat are respectively connected with a first sliding module and a second sliding module in a sliding manner, the first sliding module and the second sliding module are respectively connected with the side faces of the fixing seat through the sliding fit of the guide rail and the guide groove, and the first sliding module and the second sliding module enclose the outer side wall of the cavity.

By adopting the technical scheme, on one hand, the first half module is convenient to disassemble and assemble, and on the other hand, the first sliding module and the second sliding module are separated from the product when the mold is opened, so that the product is convenient to demold.

Optionally, one side of the fixed seat, which faces away from the second half mold, is fixedly connected with a bottom plate, and the first movable module and the second movable module are connected with the bottom plate in a sliding manner through sliding fit of the guide rail and the guide groove.

By adopting the technical scheme, the guiding of the activities of the first activity module and the second activity module is realized in the limited space of the first half module.

Optionally, a third diagonal rod and a fourth diagonal rod are arranged on the second half module, a third diagonal hole matched with the third diagonal rod is arranged on the first sliding module, and a fourth diagonal hole matched with the fourth diagonal rod is arranged on the second sliding module.

By adopting the technical scheme, the third diagonal rod and the fourth diagonal rod move along with the second half die during die opening, and the first sliding module and the second sliding module can be driven to separate from a product.

Optionally, a backing plate is detachably connected to the inner side wall of the groove, and concave grains are arranged on the surface of the backing plate, which is in contact with the side surface of the protruding portion.

By adopting the technical scheme, the error of the side surface matching precision of the inner side wall of the groove and the side surface of the protruding part can be compensated by replacing the base plate with a proper size.

Optionally, the first movable module and the second movable module are located on the highest surface outside the groove, and have a triangular runner communicated with the injection molding opening, a part of the triangular runner is located outside the cavity, another part of the triangular runner is overlapped with the cavity, and the tip of the triangular runner is located outside the cavity.

Through adopting above-mentioned technical scheme, the fashioned triangle-shaped board of triangle-shaped runner department distributes on the long limit and the minor face of door frame, has improved the structural strength of door frame, makes the door frame drawing of patterns to cooling off the difficult deformation in this period completely. And after the door frame is completely cooled, cutting off the sharp corner of the triangular plate.

Optionally, the four corners of the cavity are provided with extending portions, and the extending directions of the extending portions are parallel to the mold opening direction.

By adopting the technical scheme, the product can be quickly demoulded.

In a second aspect, the present application provides a door frame forming process, which adopts the following technical scheme:

a door frame forming process comprises the following steps:

step1, controlling the driving mechanism to extend out of the push plates during die assembly, so that all the push plates are tightly pressed against the side surfaces of the protruding parts;

step2, injection molding;

step3, opening the mold after the product is molded, wherein the first diagonal rod and the second diagonal rod move along with the second half mold to force the first movable module and the second movable module to approach and separate from the product when the mold is opened, and the third diagonal rod and the fourth diagonal rod move along with the second half mold to force the two first sliding modules to separate from the product and the two second sliding modules to separate from the product when the mold is opened;

and step4, simultaneously pushing four extending parts to four corners of the product to push the product out of the cavity.

By adopting the technical scheme, the rapid forming and demoulding of the door frame are realized, and the production efficiency is improved; the dimensional accuracy of the door frame forming is also improved, and the production quality is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the rapid forming and demoulding of the door frame are realized, and the production efficiency is improved;

2. the dimensional accuracy of door frame shaping is improved, production quality has been improved.

Drawings

Fig. 1 is a schematic structural diagram of a door frame in the background art of the present application;

fig. 2 is a schematic structural diagram of a door frame forming mold in an embodiment of the present application;

FIG. 3 is a schematic view of the structure of a first mold half according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of the first half mould after hiding a first sliding module and a second sliding module in the embodiment of the application;

FIG. 5 is a top view of a second mold half according to an embodiment of the present application;

FIG. 6 is a schematic view of a product formed in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a first activity module in an embodiment of the present application;

FIG. 8 is a high level partial block diagram of a first activity module in an embodiment of the present application;

fig. 9 is a perspective view of a second mold half in an embodiment of the present application.

Description of reference numerals: 1. a first mold half; 2. a second mold half; 3. a cavity; 4. a first activity module; 5. a second activity module; 6. a first diagonal member; 7. a second diagonal member; 8. a first inclined hole; 9. a second inclined hole; 10. a groove; 11. a projection; 12. pushing the plate; 13. a guide post; 14. a guide hole; 15. a pit; 16. a telescopic cylinder; 17. a fixed seat; 18. a first slip module; 19. a second slip module; 20. a base plate; 21. a third diagonal member; 22. a fourth diagonal bar; 23. a third inclined hole; 24. a fourth inclined hole; 25. a backing plate; 26. lines; 27. a triangular flow channel; 28. an injection molding port; 29. a protruding portion; 30. producing a product; 31. a guide rail; 32. a guide groove; 33. a triangular plate; 34. the module is not moved.

Detailed Description

The present application is described in further detail below with reference to figures 2-6.

The embodiment of the application discloses door frame forming die. Referring to fig. 2, the doorframe forming mold includes a first mold half 1 and a second mold half 2 enclosing a forming cavity 3 (see fig. 3), and after demolding, a formed product 30 (doorframe) is left in the first mold half 1.

Referring to fig. 3, the first mold half 1 includes four fixing seats 17, two first sliding modules 18, two second sliding modules 19, a first movable module 4 and a second movable module 5, the fixing seats 17 are located at four corners of the first mold half 1, the fixing seats 17 are fixed relative to the injection molding apparatus, and the first sliding modules 18 and the second sliding modules 19 can slide in the same plane relative to the fixing seats 17.

Referring to fig. 2 and 3, a bottom plate 20 is fixed on the four fixing seats 17, the bottom plate 20 is located on a side of the first half mold 1 opposite to the second half mold 2, the guide posts 13 are fixed on the bottom plate 20, and the second half mold 2 has guide holes 14 matched with the guide posts 13. The first movable module 4 and the second movable module 5 are both located between the second half mold 2 and the bottom plate 20 and both located in the enclosure of the cavity 3, and the first movable module 4 and the second movable module 5 participate in enclosing the inner side wall of the cavity 3.

Referring to fig. 4, the first movable module 4 and the second movable module 5 are slidably connected to the bottom plate 20 through a sliding fit between a guide rail 31 and a guide groove 32, the guide rail 31 is fixed on the bottom plate 20, the guide groove 32 is provided at the bottom of the first movable module 4 and the bottom of the second movable module 5, and a sliding direction of the first movable module 4 and the second movable module 5 is perpendicular to a central axis of the guide post 13.

Referring to fig. 3, two adjacent side surfaces of the fixed seat 17 are connected with the first sliding module 18 and the second sliding module 19 in a sliding manner, and the first sliding module 18 and the second sliding module 19 are connected with the side surfaces of the fixed seat 17 through the sliding fit of the guide rail 31 and the guide groove 32. A guide groove 32 can be arranged on the side surface of the fixed seat 17, and a guide rail 31 is arranged on the side surfaces of the first sliding module 18 and the second sliding module 19; the side surface of the fixed seat 17 may be provided with a guide rail 31, and the side surfaces of the first sliding module 18 and the second sliding module 19 may be provided with a guide groove 32. The two first sliding modules 18 and the two second sliding modules 19 participate in enclosing four faces of the outer side wall of the cavity 3, and when the product 30 is molded, the four faces of the outer wall of the product 30 are attached to the two first sliding modules 18 and the two second sliding modules 19.

Referring to fig. 5, the second mold half 2 is fixed with a first diagonal bar 6, a second diagonal bar 7, a third diagonal bar 21, and a fourth diagonal bar 22.

Referring to fig. 4, a first inclined hole 8 matched with the first inclined rod 6 is formed in the first movable module 4, a second inclined hole 9 matched with the second inclined rod 7 is formed in the second movable module 5, a third inclined hole 23 (see fig. 3 for details) matched with the third inclined rod 21 is formed in the first sliding module 18, and a fourth inclined hole 24 matched with the fourth inclined rod 22 is formed in the second sliding module 19.

Referring to fig. 5, the first diagonal member 6 and the second diagonal member 7 are symmetrical about a central axis of the cavity 3 in the length direction, and an end of the first diagonal member 6 away from the second mold half 2 and an end of the second diagonal member 7 away from the second mold half 2 are close to each other. The end of the third diagonal bar 21 away from the second half mold 2 and the end of the fourth diagonal bar 22 away from the second half mold 2 both point in a direction away from the cavity 3.

Referring to fig. 3, the first movable mold 4 and the second movable mold 5 are composed of a high portion and a low portion, the first inclined hole 8 and the second inclined hole 9 are both located on the low portion, a plurality of triangular flow channels 27 are formed on the highest surface of the high portion, and the triangular flow channels 27 are communicated with the injection molding opening 28. One part of the triangular flow passage 27 is positioned in the die cavity 3, the other part of the triangular flow passage 27 is superposed with the die cavity 3, and the tip of the triangular flow passage 27 is positioned outside the die cavity 3.

Referring to fig. 6, the triangular plates 33 formed at the triangular flow channels 27 are distributed on the long and short sides of the door frame, so that the structural strength of the door frame can be improved, and the door frame is not easily deformed during the period from the demolding to the complete cooling. After the door frame is completely cooled, the sharp corner of the triangular plate 33 is cut off.

Referring to fig. 2, when the product 30 is formed, the high portions of the first movable mold piece 4 and the second movable mold piece 5 are attached to the long side portion of the product 30, and the short side portion of the product 30 is attached to the stationary mold piece 34 fixed to the base plate 20. The cavity 3 is provided at four corners with protrusions 29 (see fig. 4), the stationary mold block 34 is located between two adjacent protrusions 29, and the protrusion direction of the protrusions 29 is parallel to the central axis of the guide post 13.

Referring to fig. 3, the high portion of the first movable mold piece 4, the high portion of the second movable mold piece 5 and the two stationary mold pieces 34 define a groove 10, and the second mold half 2 is provided with a protrusion 11 (see fig. 5) which is engaged with the groove 10 when the mold is closed.

Referring to fig. 4, a pad 25 is detachably attached to the inner wall of the groove 10 by screws, and the pad 25 is sandwiched between the inner wall of the groove 10 and the side surface of the projection 11 when the mold is closed. The surface of the backing plate 25 in contact with the side of the projection 11 is provided with a recessed ridge 26, and the ridge 26 is used for containing lubricating oil.

Referring to fig. 4 and 7, push plates 12 pushed by a driving mechanism are arranged on the inner side walls of the grooves 10 in pairs, and the two push plates 12 in each pair push in opposite directions.

Referring to fig. 8, the driving mechanism is a telescopic cylinder 16 housed inside the first movable module 4 and the second movable module 5, and the push plate 12 is connected to a piston rod of the telescopic cylinder 16.

Referring to fig. 9, for the convenience of demolding, the side surface of the protrusion 11 is an inclined surface, and a concave pit 15 is formed on the inclined surface for the push plate 12 to push in.

The forming process of the door frame forming die provided by the embodiment of the application comprises the following steps:

firstly, controlling a driving mechanism to extend out of the push plates 12 during die assembly, so that all the push plates 12 are tightly pressed against the side surfaces of the protruding parts 11;

secondly, injection molding;

thirdly, opening the mold after the product 30 is formed, wherein the first diagonal rod 6 and the second diagonal rod 7 move along with the second half mold 2 to force the first movable module 4 and the second movable module 5 to approach and separate from the product 30 when the mold is opened, and the third diagonal rod 21 and the fourth diagonal rod 22 move along with the second half mold 2 to force the two first sliding modules 18 to separate from the product 30 and force the two second sliding modules 19 to separate from the product 30;

and fourthly, simultaneously pushing the four extending parts 29 against four corners of the product 30 to push the product 30 out of the cavity 3.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a door frame forming die, is including first half mould (1) and second half mould (2) that surround into die cavity (3), its characterized in that: a first movable module (4) and a second movable module (5) are arranged in an enclosing ring of the cavity (3) on the first half die (1), the first movable module (4) and the second movable module (5) participate in enclosing to form an inner side wall of the cavity (3), a first diagonal rod (6) and a second diagonal rod (7) are arranged on the second half die (2), the first diagonal rod (6) and the second diagonal rod (7) are symmetrical about a central axis of the cavity (3) in the length direction, and one end, far away from the second half die (2), of the first diagonal rod (6) and one end, far away from the second half die (2), of the second diagonal rod (7) are close to each other; be equipped with on first movable mould piece (4) with first down tube (6) complex first inclined hole (8), be equipped with on second movable mould piece (5) with second down tube (7) complex second inclined hole (9), first movable mould piece (4) and second movable mould piece (5) enclose into recess (10), be equipped with on second half module (2) during the compound die with recess (10) complex bulge (11), be equipped with push pedal (12) that promote by actuating mechanism on recess (10) inside wall in pairs, push pedal (12) are used for bulldozing in the side of bulge (11) and every two push pedal (12) promotion opposite direction.

2. The door frame molding die of claim 1, wherein: the side surface of the convex part (11) is provided with a concave pit (15) for inserting the push plate (12).

3. The door frame molding die of claim 1, wherein: the driving mechanism comprises a telescopic cylinder (16), and the push plate (12) is fixed on a piston rod of the telescopic cylinder (16).

4. The door frame molding die of claim 1, wherein: the four corners department of first half mould (1) all is equipped with fixing base (17), and two adjacent sides of fixing base (17) slide respectively and connect first module (18), the second module (19) that slides, and first module (18) and the second module (19) that slides all pass through the sliding fit of guide rail (31) and guide slot (32) and are connected with the side of fixing base (17), and first module (18) and the second module (19) that slides have enclosed the lateral wall of die cavity (3).

5. The door frame molding die of claim 4, wherein: one side of the fixed seat (17) back to the second half die (2) is fixedly connected with a bottom plate (20), and the first movable module (4) and the second movable module (5) are connected with the bottom plate (20) in a sliding mode through sliding fit of the guide rail (31) and the guide groove (32).

6. The door frame molding die of claim 4, wherein: and a third inclined rod (21) and a fourth inclined rod (22) are arranged on the second half die (2), a third inclined hole (23) matched with the third inclined rod (21) is formed in the first sliding module (18), and a fourth inclined hole (24) matched with the fourth inclined rod (22) is formed in the second sliding module (19).

7. The door frame molding die of claim 1, wherein: the inner side wall of the groove (10) is detachably connected with a backing plate (25), and the surface of the backing plate (25) contacted with the side surface of the convex part (11) is provided with concave grains (26).

8. The door frame molding die of claim 1, wherein: the first movable module (4) and the second movable module (5) are positioned on the highest surface outside the groove (10) and are provided with triangular flow channels (27) communicated with the injection molding opening (28), one part of each triangular flow channel (27) is positioned outside the cavity (3), the other part of each triangular flow channel is superposed with the cavity (3), and the tips of the triangular flow channels (27) are positioned outside the cavity (3).

9. The door frame molding die of claim 6, wherein: and four corners of the cavity (3) are provided with extending parts (29), and the extending direction of the extending parts (29) is parallel to the mold opening direction.

10. The door frame forming die forming process of claim 9, characterized by comprising the following steps:

step1, controlling the driving mechanism to extend out of the push plates (12) during die assembly, and enabling all the push plates (12) to tightly abut against the side surfaces of the protruding parts (11);

step2, injection molding;

step3, opening the mold after the product (30) is formed, wherein the first diagonal rod (6) and the second diagonal rod (7) move along with the second half mold (2) to force the first movable module (4) and the second movable module (5) to approach and separate from the product (30) when the mold is opened, and the third diagonal rod (21) and the fourth diagonal rod (22) move along with the second half mold (2) to force the two first sliding modules (18) to separate from the product (30) and the two second sliding modules (19) to separate from the product (30);

and Step4, simultaneously pushing the four extending parts (29) against the four corners of the product (30) to push the product (30) out of the cavity (3).