CN223803002U - An injection mold with a rear mold angled pull structure - Google Patents

Abstract

The utility model provides an injection mold with a rear mold oblique-drawing structure, wherein a rear mold core is designed into a structure comprising a rear mold core fixing plate and two rear mold core movable plates, the two rear mold core movable plates are oppositely arranged and can be laterally movably arranged, an oblique-drawing insert for forming an opening is arranged on the rear mold core fixing plate in a penetrating manner to form positioning assembly, and a driving insert is fixed on the rear mold core movable plate and forms oblique guide fit with the oblique-drawing insert, so that the oblique-drawing insert is in linkage with the rear mold core movable plate, and when the mold is opened, the outward movement of the rear mold core movable plate drives the oblique-drawing insert to retract to be far away from a forming core, so that a product is drawn away, and the problem that the insert arranged on the rear mold is difficult to loose core is solved. Meanwhile, the two rear mold core movable plates can be laterally movably arranged, so that the mold opening is more sufficient, the contact area between the product and the mold before ejection is reduced to a greater extent, and the ejection of the product is more facilitated.

Description

Injection mold with rear mold inclined drawing structure

Technical Field

The utility model relates to the field of injection molds, in particular to an injection mold with a rear mold inclined drawing structure.

Background

The injection mold is a tool for producing plastic products, is also a tool for endowing the plastic products with complete structures and accurate dimensions, is a processing method used for mass production of parts with complex shapes, and specifically refers to a method for injecting heated and melted plastic into a mold cavity by an injection molding machine under high pressure, and obtaining a formed product after cooling and solidifying.

In the injection molding product shown in fig. 1, since the handle portion 2 of the product 1 has two openings 3 arranged opposite to each other, during molding, one opening 3 can be formed by arranging an insert on the front mold, and the other opening 3 can be formed by only arranging an insert on the rear mold, but the rear mold core is generally fixed on the rear mold, which results in difficulty in removing the insert arranged on the rear mold and finally results in abnormal demolding of the product.

Disclosure of utility model

Therefore, the utility model provides the injection mold with the rear mold oblique drawing structure, and the insert can form linkage drawing when being arranged on the rear mold.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

The injection mold comprises a front mold, a rear mold, a front mold core arranged on the front mold, a rear mold core arranged on the rear mold, a rear mold core moving plate arranged on the rear mold, a driving part, a forming core, an oblique drawing insert and a driving insert, wherein the rear mold core comprises a rear mold core fixing plate and two rear mold core moving plates, the rear mold core fixing plate is fixedly assembled on the rear mold, the two rear mold core moving plates are positioned on the surface of the rear mold core fixing plate, the two rear mold core moving plates are oppositely arranged and can move laterally, the front mold core, the rear mold core fixing plate and the two rear mold core moving plates are enclosed together to form an injection cavity, the rear mold oblique drawing structure comprises a driving part, a forming core, an oblique drawing insert and a driving insert, the driving part is connected with the forming core so as to drive the forming core to extend into or draw out the injection cavity of the injection mold, and the driving insert is movably arranged on the rear mold insert fixing plate in a penetrating manner and corresponds to the forming core, and the driving insert is fixed on the rear mold core moving plate and forms an oblique drawing insert to form an oblique drawing guide and forms an oblique drawing cavity, and the oblique drawing insert is far away from the forming core and moves laterally and is far away from the forming core.

Furthermore, the oblique drawing insert is provided with an oblique guide hole oblique to the moving direction of the rear mold core moving plate, and the driving insert is arranged in the oblique guide hole of the oblique drawing insert in a penetrating manner to form oblique guide fit with the oblique drawing insert.

Further, the end part of the inclined drawing insert, which is positioned at the bottom of the rear die core fixing plate, is radially outwards extended to form an abutting part, a reset spring is arranged between the abutting part and the rear die core fixing plate, and the reset spring applies elastic force to the inclined drawing insert, which is far away from the forming core.

Further, the driving part comprises a sliding block and a first shovel base, the sliding block is slidably arranged on the rear die and fixedly connected with the forming core, the first shovel base is fixed on the front die and forms oblique guide fit with the sliding block, and the sliding block is driven to slide by the front die and the opening die of the rear die through the first shovel base so as to drive the forming core to loose core.

The die comprises a front die, a rear die core moving plate, a front die and a rear die core moving plate, and is characterized by further comprising a second shovel base, wherein the second shovel base is provided with two groups, the two groups of second shovel bases are fixed on the front die and respectively form oblique guide fit with the two rear die core moving plate, and the front die and the rear die are opened to drive the two rear die core moving plates to separate laterally outwards through the two groups of second shovel bases.

Further, the mold clamping device also comprises two mold clamping driving blocks, wherein the two mold clamping driving blocks are fixed on the front mold and are respectively positioned at the outer sides of the two rear mold core movable plates, the inner sides of the mold clamping driving blocks and the outer sides of the corresponding rear mold core movable plates form oblique guide fit, and when the front mold and the rear mold are mutually close, the mold clamping driving blocks and the second shovel base drive the rear mold core movable plates to be clamped in place.

The front mold is further provided with a front mold side drawing structure, the front mold side drawing structure comprises a front mold sliding block, a front mold core and a front mold driving piece, the front mold sliding block is installed on the front mold in a laterally sliding mode, one end of the front mold core is fixed on the front mold sliding block, the other end of the front mold core penetrates through the front mold core to extend into the injection molding cavity, and the front mold driving piece is connected with the front mold sliding block to drive the front mold sliding block to slide.

Further, the front mould driving piece is a third shovel base, the front mould comprises a first front mould plate and a second front mould plate, the first front mould plate is detachably arranged on the surface of the second front mould plate, the front mould core and the front mould sliding block are both arranged on the second front mould plate, the third shovel base is fixed on the first front mould plate and forms oblique guide fit with the front mould sliding block, and the second shovel base is fixed on the second front mould plate.

Further, still include front mould mold insert and actuating spring, the first end of front mould mold insert is fixed by the centre gripping between first front mould board and second front mould board, actuating spring sets up between front mould mold insert and second front mould board in order to apply the elasticity towards first front mould board direction to front mould mold insert, the second end of front mould mold insert passes second front mould board and front mould benevolence in proper order and stretches into the chamber of moulding plastics, the front mould mold insert stretches into the second end in the chamber of moulding plastics corresponds the shaping core.

Further, the front mold insert is inclined to the mold opening and closing direction of the front mold and the rear mold, a connecting notch is further formed in the side face of the front mold insert, a pulling block is fixed on the first front mold plate, and the pulling block is inserted into the connecting notch of the front mold insert.

The technical scheme provided by the utility model has the following beneficial effects:

The rear mold core is designed into a structure comprising a rear mold core fixing plate and two rear mold core movable plates, the two rear mold core movable plates are oppositely arranged and can laterally movably arranged, afterwards, an oblique drawing insert for forming an opening is arranged on the rear mold core fixing plate in a penetrating manner to form positioning assembly, the driving insert is fixed on the rear mold core movable plate and forms oblique guide fit with the oblique drawing insert, so that the oblique drawing insert is in linkage with the rear mold core movable plate, and when the mold is opened, the outward movement of the rear mold core movable plate can drive the oblique drawing insert to retract and be far away from the forming core, so that a drawing product is realized, and the problem that the insert arranged on the rear mold is difficult to loose core is solved. Meanwhile, the two rear mold core movable plates can be laterally movably arranged, so that the mold opening is more sufficient, the contact area between the product and the mold before ejection is reduced to a greater extent, and the ejection of the product is more facilitated.

Drawings

FIG. 1 is a schematic view of the structure of an injection molded product;

FIG. 2 is a side view of an injection mold with a rear mold tilt-draw configuration in an embodiment;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a top view of an injection mold with a rear mold tilt-draw configuration according to an embodiment;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;

FIG. 7 is an enlarged schematic view of region D of FIG. 6;

fig. 8 is a schematic diagram showing an internal structure of the oblique drawing structure with the rear mold in the embodiment.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

In the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", and the like are used for convenience of description and simplicity of operation only, and do not denote or imply that the apparatus or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

The utility model will now be further described with reference to the drawings and detailed description.

The injection mold with the rear mold inclined drawing structure provided by the embodiment is used for forming a product shown in fig. 1. Referring to fig. 2 to 8, the injection mold comprises a front mold 11, a rear mold 12, a front mold core 21 arranged on the front mold 11 and a rear mold core arranged on the rear mold 12, wherein the rear mold core comprises a rear mold core fixing plate 22 and two rear mold core movable plates 23, the rear mold core fixing plate 22 is fixedly assembled on the rear mold 12, the two rear mold core movable plates 23 are arranged on the surface of the rear mold core fixing plate 22, the two rear mold core movable plates 23 are oppositely arranged and can move laterally, the opening and closing directions of the front mold 11 and the rear mold 12 are defined as the Z-axis directions, and then the lateral movement of the two rear mold core movable plates 23 means that the two rear mold core movable plates can move along the X-axis directions perpendicular to the Z-axis directions so as to realize mutual distance or mutual approaching movement. Specifically, a sliding groove is formed in the rear mold 12, and two rear mold core movable plates 23 are assembled on the sliding groove of the rear mold 12 to realize movement. The front mold core 21, the rear mold core fixing plate 22 and the two rear mold core movable plates 23 are enclosed together to form an injection cavity, and the injection cavity is used for injecting the product 1 shown in fig. 1. Specifically, the rear mold insert fixing plate 22 is fixedly provided with a molding post 221 for molding the cup-shaped cavity of the product 1, and of course, in other embodiments, whether the molding post 221 is provided may be selected according to the structure of the product 1.

Specifically, the front mold insert 31 and the rear mold oblique drawing structure are further included, the rear mold oblique drawing structure comprises a driving part 247, a molding core 241, an oblique drawing insert 242 and a driving insert 243, the driving part 247 is in driving connection with the molding core 241 so as to drive the molding core 241 to extend into or draw out of an injection cavity of an injection mold, the molding core 241 is used for molding a hollow cavity of a handle 2 of a product 1, a first end of the front mold insert 31 is assembled on the front mold 11, a second end of the front mold insert 31 extends into the injection cavity and corresponds to the molding core 241 and is used for molding one opening 3, and the oblique drawing insert 242 movably penetrates through the rear mold insert fixing plate 22 and corresponds to the molding core 241 and is used for molding the other opening 3 on the handle 2 of the product 1.

The driving insert 243 is fixed on the rear mold core moving plate 23 and forms an oblique guide fit with the oblique drawing insert 242, and the lateral outward movement of the rear mold core moving plate 23 drives the oblique drawing insert 242 to retract away from the molding core 241 through the driving insert 243.

The working principle of the injection mold is that in a mold closing state, a molding core 241, a front mold insert 31 and an inclined drawing insert 242 extend into an injection cavity to participate in injection molding, after a product 1 is solidified and molded, a front mold 11 and a rear mold 12 start to separate, the front mold insert 31 is separated from the product 1, a front mold insert 21 is separated from the product, two rear mold insert movable plates 23 are separated laterally outwards and separated from the product 1, in the process that the rear mold insert movable plates 23 move laterally outwards, the inclined drawing insert 242 is driven to synchronously move by a driving insert 243 so that the inclined drawing insert 242 is separated from the product, meanwhile, the molding core 241 is driven by a driving part 247 to also be separated, and finally, the product 1 is combined with a rear mold insert fixed plate 22 and a molding column 221 only after all the mold opening actions are completed. Finally, the product 1 is ejected out through the ejector pins of the rear mold 12.

The above structure provided in this embodiment solves the problem that the insert (referred to as the oblique drawing insert 242) provided in the rear mold 12 is difficult to draw core. Meanwhile, the side movable arrangement of the two rear mold insert movable plates 23 enables the mold opening to be more sufficient, so that the contact area between the product 1 and the mold before ejection is reduced to a greater extent (namely, after all actions of mold opening are completed, the product 1 is only combined with the rear mold insert fixed plates 22 and the forming columns 221), and ejection of the product 1 is facilitated.

Further, in the present embodiment, the oblique guiding hole inclined to the moving direction of the rear mold core moving plate 23 is formed in the oblique drawing insert 242, the driving insert 243 is inserted into the oblique guiding hole of the oblique drawing insert 242 to form an oblique guiding fit with the oblique drawing insert 242, and the oblique drawing insert 242 and the driving insert 243 are more firmly matched in a matching manner of the oblique guiding hole.

The end of the oblique insert 242 at the bottom of the rear mold insert fixing plate 22 extends radially outwards to form an abutting part, a return spring 244 is arranged between the abutting part and the rear mold insert fixing plate 22, and the return spring 244 applies an elastic force to the oblique insert 242 away from the molding core 241. By the arrangement, the inclined drawing insert 242 further ensures the retraction of the inclined drawing insert 242 through the elastic force exerted by the return spring 244, so that the retraction of the inclined drawing insert 242 is more timely and is not easy to be blocked. Of course, the return spring 244 may not be used in other embodiments.

The driving part 247 comprises a sliding block 245 and a first shovel base 246, the sliding block 245 is slidably arranged on the rear die 12 and fixedly connected with the molding core 241, the first shovel base 246 is fixed on the front die 11 and forms oblique guide fit with the sliding block 245, and the opening dies of the front die 11 and the rear die 12 drive the sliding block 245 to slide through the first shovel base 246 so as to drive the molding core 241 to loose core. In this embodiment, the first shovel base 246 is a guide bar inclined to the Z axis, the slide block 245 is provided with an inclined guide hole, the first shovel base 246 is fixed on the front mold 12 and inserted into the inclined guide hole of the slide block 245, so that the core pulling of the molding core 241 is driven by the mold opening actions of the front mold 11 and the rear mold 12, that is, when the front mold 11 and the rear mold 12 are separated, the first shovel base 246 drives the slide block 245 and the molding core 241 to synchronously pull the core, no external driving component is required to be adopted for driving, the structure is simplified, and the actions are more synchronous. Specifically, the cooperation of the slider 245 and the first shovel base 246 also enables the front mold 11 and the rear mold 12 to synchronously drive the molding core 241 to be inserted into the injection cavity when the front mold 11 and the rear mold 12 are closed.

In this embodiment, the structure for driving the two rear mold core moving plates 23 to move is as follows, the structure further comprises a second shovel base 27, the second shovel base 27 has two groups, the two groups of second shovel bases 27 are fixed on the front mold 11 and respectively form oblique guide fit with the two rear mold core moving plates 23, and the front mold 11 and the rear mold 12 are opened to drive the two rear mold core moving plates 23 to separate laterally outwards through the two groups of second shovel bases 27. Namely, the two rear mold insert moving plates 23 are driven by the mold opening and closing actions of the front mold 11 and the rear mold 12. Further, the second shovel base 27 is a guide bar inclined to the Z axis, the rear mold core movable plate 23 is provided with an inclined guide hole, and the second shovel base 27 is fixed on the front mold 11 and inserted into the inclined guide hole of the rear mold core movable plate 23, thereby realizing linkage.

Further, the mold clamping device also comprises two mold clamping driving blocks 25, wherein the two mold clamping driving blocks 25 are fixed on the front mold 11 and are respectively positioned at the outer sides of the two rear mold cavity movable plates 23, the inner sides of the mold clamping driving blocks 25 and the outer sides of the corresponding rear mold cavity movable plates 23 form oblique guide fit, namely, the inner sides of the mold clamping driving blocks 25 and the outer sides of the rear mold cavity movable plates 23 form inclined planes, the front mold 11 and the rear mold 12 are mutually close (namely, when in mold clamping), the two rear mold cavity movable plates 23 are mutually close to each other through the fit of the second shovel base 27, and when the mold clamping is completed quickly, the two rear mold cavity movable plates 23 are driven to be in place through the mold clamping driving blocks 25 at the two sides, so that the mold clamping is more reliable.

Further, the outside of the product 1 of fig. 1 has a cavity 4. The front mold 11 of the injection mold of this embodiment is further provided with a front mold side-drawing structure for forming the cavity 4. The front mold side drawing structure comprises a front mold sliding block 42, a front mold core 41 and a front mold driving piece 43, wherein the front mold sliding block 42 is installed on the front mold 11 in a side sliding way, one end of the front mold core 41 is fixed on the front mold sliding block 42, the other end of the front mold core 41 penetrates through the front mold core 21 to extend into the injection cavity for participating in the cavity 4 structure of a molded product 1, and the front mold driving piece 43 is connected with the front mold sliding block 42 to drive the front mold sliding block 42 to slide. Core pulling of the front mold core 41 is realized.

Specifically, the front mold driving member 43 is a third shovel base 44, the front mold 12 includes a first front mold plate 111 and a second front mold plate 112, the first front mold plate 111 is detachably disposed on the surface of the second front mold plate 112, the front mold insert 21 and the front mold slide block 42 are both disposed on the second front mold plate 112, the third shovel base 44 is fixed on the first front mold plate 111 and forms an oblique guide fit with the front mold slide block 42, and the second shovel base 27 is also fixed on the second front mold plate 112. When the die is opened, the first front die plate 111 and the second front die plate 112 are separated, and at this time, the front die sliding block 42 is driven to slide outwards by the third shovel base 44, so that the core pulling of the front die core 41 is realized, the structural design is simple, and no additional driving part is required for driving. Of course, in other embodiments, if the product 1 does not have the cavity 4, the injection mold may not need to be designed with the front mold side-draw structure.

Further, in the present embodiment, the front mold insert 31 is inclined to the Z-axis direction, and thus the front mold 11 and the rear mold 12 cannot be directly driven to draw core by the mold opening operation. For this reason, in the present embodiment, two structures are added, one is a structure in which a driving spring 32 is added, a first end of the front mold insert 31 is clamped and fixed between the first front mold plate 111 and the second front mold plate 112, the driving spring 32 is disposed between the front mold insert 31 and the second front mold plate 112 to apply an elastic force to the front mold insert 31 toward the first front mold plate 111, a second end of the front mold insert 31 sequentially passes through the second front mold plate 112 and the front mold insert 21 to extend into the injection cavity, and a second end of the front mold insert 31 extends into the injection cavity to correspond to the molding core 241. When the first front mold plate 111 and the second front mold plate 112 start to separate, the fixation of the front mold insert 31 is lost, and at this time, the front mold insert 31 moves in the direction of the first front mold plate 111 by the drive spring 32, thereby performing core pulling. The second structure is that a connection notch 311 is further formed on the side surface of the front mold insert 31, a pulling block 33 is fixed on the first front mold plate 111, the pulling block 33 is inserted into the connection notch 311 of the front mold insert 31, when the first front mold plate 111 and the second front mold plate 112 start to separate, the front mold insert 31 is pulled to separate by the movement of the first front mold plate 111 along the Z-axis direction through the pulling block 33, and when the front mold insert 31 moves to a certain distance, the pulling block 33 is separated from the connection notch 311 of the front mold insert 31. The two structures act together, so that the core pulling action of the front mold insert 31 is more timely and reliable. Of course, in other embodiments, either of the above structures may be optional, or the front mold insert 31 may not be configured when the product 1 has only one rear opening 3.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The injection mold with the back mold oblique drawing structure comprises a front mold, a back mold, a front mold core arranged on the front mold and a back mold core arranged on the back mold, and is characterized in that the back mold core comprises a back mold core fixing plate and two back mold core movable plates, the back mold core fixing plate is fixedly assembled on the back mold, the two back mold core movable plates are positioned on the surface of the back mold core fixing plate, the two back mold core movable plates are oppositely arranged and can move laterally, the front mold core, the back mold core fixing plate and the two back mold core movable plates are enclosed together to form an injection cavity, the back mold oblique drawing structure comprises a driving part, a forming core, an oblique drawing insert and a driving insert, the driving part is in driving connection with the forming core so as to drive the forming core to stretch into or draw out of an injection cavity of the injection mold, the oblique drawing insert is movably arranged on the back mold core fixing plate in a penetrating manner and corresponds to the forming core, and the driving insert is fixed on the back mold core movable plate and forms an oblique drawing insert to form an oblique drawing cavity, and the oblique drawing insert is driven to move laterally away from the oblique drawing insert and move away from the forming core.

2. The injection mold with the back mold oblique-drawing structure of claim 1, wherein the oblique-drawing insert is provided with an oblique guide hole oblique to the moving direction of the back mold core movable plate, and the driving insert is arranged in the oblique guide hole of the oblique-drawing insert in a penetrating manner to form oblique guide fit with the oblique-drawing insert.

3. The injection mold with the rear mold oblique-drawing structure of claim 1, wherein the end part of the oblique-drawing insert, which is positioned at the bottom of the rear mold insert fixing plate, is radially outwards extended to form an abutting part, a return spring is arranged between the abutting part and the rear mold insert fixing plate, and the return spring applies elastic force to the oblique-drawing insert, which is far away from the molding core.

4. The injection mold with the back mold oblique drawing structure as set forth in claim 1, wherein the driving part comprises a slide block and a first shovel base, the slide block is slidably arranged on the back mold and fixedly connected with the molding core, the first shovel base is fixed on the front mold and forms oblique guide fit with the slide block, and the opening molds of the front mold and the back mold drive the slide block to slide through the first shovel base so as to drive the molding core to draw core.

5. The injection mold with the back mold oblique drawing structure of claim 1, further comprising a second shovel base, wherein the second shovel base is provided with two groups, the two groups of second shovel bases are fixed on the front mold and respectively form oblique guide fit with the two back mold core movable plates, and the front mold and the back mold are opened to respectively drive the two back mold core movable plates to separate laterally outwards through the two groups of second shovel bases.

6. The injection mold with the back mold oblique-drawing structure of claim 5, further comprising two mold closing driving blocks, wherein the two mold closing driving blocks are fixed on the front mold and are respectively positioned at the outer sides of the two back mold core movable plates, the inner sides of the mold closing driving blocks and the outer sides of the corresponding back mold core movable plates form oblique guide fit, and the mold closing driving blocks and the second shovel base drive the back mold core movable plates to be closed together when the front mold and the back mold are mutually close.

7. The injection mold with the back mold oblique drawing structure as set forth in claim 5, wherein the front mold is further provided with a front mold side drawing structure, the front mold side drawing structure comprises a front mold slide block, a front mold core and a front mold driving piece, the front mold slide block is installed on the front mold in a laterally sliding manner, one end of the front mold core is fixed on the front mold slide block, the other end of the front mold core penetrates through the front mold core to extend into the injection cavity, and the front mold driving piece is connected with the front mold slide block to drive the front mold slide block to slide.

8. The injection mold with the back mold oblique-drawing structure of claim 7, wherein the front mold driving piece is a third shovel base, the front mold comprises a first front mold plate and a second front mold plate, the first front mold plate is detachably arranged on the surface of the second front mold plate, the front mold core and the front mold sliding block are both arranged on the second front mold plate, the third shovel base is fixed on the first front mold plate and forms oblique guide fit with the front mold sliding block, and the second shovel base is fixed on the second front mold plate.

9. The injection mold with the back mold oblique drawing structure as set forth in claim 8, further comprising a front mold insert and a driving spring, wherein a first end of the front mold insert is clamped and fixed between the first front mold plate and the second front mold plate, the driving spring is disposed between the front mold insert and the second front mold plate to apply an elastic force to the front mold insert toward the first front mold plate, a second end of the front mold insert sequentially penetrates through the second front mold plate and the front mold insert to extend into the injection cavity, and a second end of the front mold insert extends into the injection cavity to correspond to the molding core.

10. The injection mold with the back mold oblique drawing structure of claim 9, wherein the front mold insert is inclined to the mold opening and closing direction of the front mold and the back mold, a connecting notch is further formed in the side surface of the front mold insert, a pulling block is fixed on the first front mold plate, and the pulling block is inserted into the connecting notch of the front mold insert.