Injection mold with rear mold inclined pulling structure

Abstract

The utility model provides an injection mold with a rear mold inclined pulling structure, which is characterized in that a rear mold core is designed into a structure consisting of a rear mold core fixed plate and two rear mold core movable plates, the two rear mold core movable plates are oppositely arranged and can be laterally and movably arranged, and then an inclined pulling insert for forming an open hole is arranged on the rear mold core fixed plate in a penetrating manner to form positioning assembly; the driving insert is fixed on the rear mold core movable plate and is in inclined guide fit with the inclined pulling insert, so that the inclined pulling insert and the rear mold core movable plate form linkage, and in this way, when the mold is opened, the rear mold core movable plate moves outwards to drive the inclined pulling insert to return to be far away from the forming core, and a product is pulled away; the problem that a core of an insert arranged on a rear mold is difficult to pull is solved. And meanwhile, the two rear mold core movable plates can be laterally and movably arranged, so that mold opening is more sufficient, the contact area between the product and the mold before ejection is reduced to a greater extent, and ejection of the product is more facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold field, concretely relates to an injection mold with rear mold inclined extraction structure. BACKGROUND

[0002] Injection mold is a tool for producing plastic products, and is also a tool for giving plastic products complete structure and accurate size, injection molding is a processing method used in batch production of some complex-shaped parts, specifically refers to the high-pressure injection of heated and melted plastic into a mold cavity by an injection molding machine, and the shaped product is obtained after cooling and solidification.

[0003] As shown in the injection product, Figure 1 The handle part 2 of the product 1 has two relatively arranged openings 3, during molding, one opening 3 can be matched and molded by setting inserts on the front mold, and the other opening 3 can only be matched and molded by setting inserts on the rear mold, but the rear mold core is generally fixed on the rear mold, which makes it difficult to realize the extraction of the inserts set on the rear mold, and finally leads to abnormal product demolding. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an injection mold with rear mold inclined extraction structure, which can realize linkage extraction when the inserts are set on the rear mold.

[0005] In order to achieve the above purpose, the utility model provides the technical scheme as follows:

[0006] An injection mold with rear mold inclined extraction structure, comprising a front mold, a rear mold, a front mold core arranged on the front mold, and a rear mold core arranged on the rear mold; the rear mold core comprises a rear mold core fixed plate and two rear mold core movable plates, the rear mold core fixed plate is fixedly assembled on the rear mold, the two rear mold core movable plates are located on the surface of the rear mold core fixed plate, and the two rear mold core movable plates are oppositely arranged and can move laterally, the front mold core, the rear mold core fixed plate and the two rear mold core movable plates jointly enclose an injection cavity; further comprising a rear mold inclined extraction structure, the rear mold inclined extraction structure comprises a driving part, a molding core, an inclined extraction insert and a driving insert, the driving part is drivingly connected with the molding core to drive the molding core to extend into or pull out of the injection cavity of the injection mold, the inclined extraction insert is movably arranged on the rear mold core fixed plate and corresponds to the molding core, the driving insert is fixed on the rear mold core movable plate and forms an inclined guide cooperation with the inclined extraction insert, and the lateral outward movement of the rear mold core movable plate drives the inclined extraction insert to retreat away from the molding core through the driving insert.

[0007] Further, an inclined guide hole inclined to the movement direction of the rear mold core movable plate is formed in the inclined extraction insert, and the driving insert is arranged in the inclined guide hole of the inclined extraction insert to form an inclined guide cooperation with the inclined extraction insert.

[0008] Further, the end of the inclined pulling insert located at the bottom of the rear mold core fixing plate extends radially outward to form an abutting portion, a reset spring is arranged between the abutting portion and the rear mold core fixing plate, and the reset spring applies an elastic force to the inclined pulling insert away from the forming core.

[0009] Further, the driving portion comprises a sliding block and a first shovel base, the sliding block is slidably arranged on the rear mold and fixedly connected to the forming core, the first shovel base is fixed on the front mold and forms an inclined guide cooperation with the sliding block, and the mold opening of the front mold and the rear mold drives the sliding block to slide through the first shovel base to drive the forming core to core-pulling.

[0010] Further, it further comprises two groups of second shovel bases, the two groups of second shovel bases are fixed on the front mold and respectively form inclined guide cooperation with two rear mold core movable plates, and the mold opening of the front mold and the rear mold respectively drives two rear mold core movable plates to separate laterally outward through the two groups of second shovel bases.

[0011] Further, it further comprises two mold closing driving blocks, the two mold closing driving blocks are fixed on the front mold and respectively located outside the two rear mold core movable plates, the inner side of the mold closing driving block and the outer side of the corresponding rear mold core movable plate form inclined guide cooperation, and the front mold and the rear mold are driven to be closed in place through the mold closing driving block and the second shovel base when the front mold and the rear mold are close to each other.

[0012] Further, the front mold is further provided with a front mold side pulling structure, the front mold side pulling structure comprises a front mold sliding block, a front mold core and a front mold driving part, the front mold sliding block is laterally slidably mounted on the front mold, one end of the front mold core is fixed to the front mold sliding block, and the other end penetrates through the rear mold core to extend into the injection cavity, and the front mold driving part is connected to the front mold sliding block to drive the front mold sliding block to slide.

[0013] Further, the front mold driving part 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 separably arranged on the surface of the second front mold plate, the rear mold core and the front mold sliding block are arranged on the second front mold plate, the third shovel base is fixed on the first front mold plate and forms inclined guide cooperation with the front mold sliding block, and the second shovel base is fixed on the second front mold plate.

[0014] Further, it further comprises a front mold insert and a driving spring, 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 arranged between the front mold insert and the second front mold plate to apply an elastic force to the front mold insert in the direction of the first front mold plate, a second end of the front mold insert extends into the injection cavity in sequence through the second front mold plate and the rear mold core, and the second end of the front mold insert extending into the injection cavity corresponds to the forming core.

[0015] Further, the front mold insert is inclined to the opening and closing direction of the front mold and the rear mold, and a connecting gap is further formed in the side surface of the front mold insert.

[0016] The technical scheme has the following beneficial effects:

[0017] The rear mold core is designed as a structure of a rear mold core fixed plate and two rear mold core movable plates, the two rear mold core movable plates are oppositely arranged and can be laterally movably arranged, then, a slanting pulling insert for forming a hole is arranged on the rear mold core fixed plate to form positioning assembly, the driving insert is fixed on the rear mold core movable plate and forms a slanting guide cooperation with the slanting pulling insert, so that the slanting pulling insert forms linkage with the rear mold core movable plate, in this way, when the mold is opened, the outward movement of the rear mold core movable plate drives the slanting pulling insert to retreat and move away from the forming core, so that the product is pulled out, thereby solving the problem that the insert arranged on the rear mold is difficult to core-pulling. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 4 shows a structure schematic diagram of the product injected;

[0019] Figure 2 Fig. 5 shows a side view of the injection mold with the rear mold slanting pulling structure in the embodiment;

[0020] Figure 3 Fig. 6 shows a sectional view of Figure 2 line A-A in Fig. 5;

[0021] Figure 4 Fig. 7 shows a sectional view of Figure 2 line B-B in Fig. 5;

[0022] Figure 5 Fig. 8 shows a top view of the injection mold with the rear mold slanting pulling structure in the embodiment;

[0023] Figure 6 Fig. 9 shows a sectional view of Figure 5 line C-C in Fig. 5;

[0024] Figure 7 Fig. 10 shows an enlarged schematic diagram of Figure 6 area D in Fig. 5;

[0025] Figure 8 Fig. 11 shows a schematic diagram of the internal structure of the injection mold with the rear mold slanting pulling structure in the embodiment. DETAILED DESCRIPTION

[0026] To further illustrate the embodiments, the present application provides the accompanying drawings. These drawings are part of the disclosure of the present application, which are mainly used to illustrate the embodiments, and can be used to explain the operation principle of the embodiments in conjunction with the related description of the specification. With reference to these contents, those skilled in the art should be able to understand other possible implementations and the advantages of the present application. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] In the description of the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0028] The present application will be further described in conjunction with the drawings and specific embodiments.

[0029] The present application provides an injection mold with a rear mold inclined extraction structure, which is used for molding a product as shown in Figure 1 Referring to Figures 2 to 8 The injection mold includes 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. Specifically, the rear mold core includes a rear mold core fixed plate 22 and two rear mold core movable plates 23. The rear mold core fixed plate 22 is fixedly assembled on the rear mold 12, and the two rear mold core movable plates 23 are located on the surface of the rear mold core fixed plate 22. The two rear mold core movable plates 23 are oppositely arranged and can move laterally. The opening and closing direction of the front mold 11 and the rear mold 12 is defined as the Z-axis direction. The lateral movement of the two rear mold core movable plates 23 means that they can move along the X-axis direction perpendicular to the Z-axis direction, so as to move away from each other or move close to each other. Specifically, a sliding groove is arranged on the rear mold 12, and the 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 fixed plate 22 and the two rear mold core movable plates 23 jointly form an injection cavity, which is used for injection molding Figure 1 Specifically, a forming column 221 is fixedly assembled on the rear mold core fixed plate 22, which is used for forming a cup-shaped cavity of the product 1. Of course, in other embodiments, whether to arrange the forming column 221 can be selected according to the structure of the product 1.

[0030] Specifically, the injection mold further comprises a front mold insert 31 and a rear mold inclined pulling structure, the rear mold inclined pulling structure comprises a driving part 247, a forming core 241, an inclined pulling insert 242 and a driving insert 243, the driving part 247 is drivingly connected to the forming core 241 to drive the forming core 241 to extend into or pull out of an injection cavity of the injection mold, the forming core 241 is used for forming a hollow inner cavity of a handle 2 of the 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 forming core 241, and the front mold insert 31 is used for forming one of the openings 3, the inclined pulling insert 242 is movably arranged on the rear mold kernel fixed plate 22 and corresponds to the forming core 241, and the inclined pulling insert 242 is used for forming the other opening 3 on the handle 2 of the product 1.

[0031] The driving insert 243 is fixed on the rear mold kernel movable plate 23 and forms an inclined guide cooperation with the inclined pulling insert 242, and the rear mold kernel movable plate 23 is laterally outwardly movable and drives the inclined pulling insert 242 to retreat away from the forming core 241 through the driving insert 243.

[0032] The working principle of the injection mold is as follows: in the mold closing state, the forming core 241, the front mold insert 31 and the inclined pulling insert 242 all extend into the injection cavity to participate in the injection of the product; after the product 1 is solidified and formed, the mold opening is started, the front mold 11 and the rear mold 12 start to separate, the front mold insert 31 is separated from the product 1, the front mold kernel 21 is also separated from the product, the two rear mold kernel movable plates 23 are laterally outwardly separated and separated from the product 1, in the process of the lateral outward movement of the rear mold kernel movable plate 23, the inclined pulling insert 242 is synchronously moved by the driving insert 243 to separate from the product, at the same time, the forming core 241 is also separated under the driving of the driving part 247; finally, after all the actions of the mold opening are completed, the product 1 is combined with only the rear mold kernel fixed plate 22 and the forming column 221. Finally, the product 1 is ejected by the ejector pin of the rear mold 12.

[0033] The above structure provided by the embodiment solves the problem that the insert (the inclined pulling insert 242) arranged on the rear mold 12 is difficult to be cored. At the same time, the lateral movement of the two rear mold kernel movable plates 23 makes the mold opening more sufficient, more greatly reduces the contact area of the product 1 with the mold before ejection (that is, after all the actions of the mold opening are completed, the product 1 is combined with only the rear mold kernel fixed plate 22 and the forming column 221), and is more beneficial to the ejection of the product 1.

[0034] Further, in the embodiment, an inclined guide hole inclined to the movement direction of the rear mold kernel movable plate 23 is arranged on the inclined pulling insert 242, the driving insert 243 is arranged in the inclined guide hole of the inclined pulling insert 242 to form an inclined guide cooperation with the inclined pulling insert 242, and the cooperation between the inclined pulling insert 242 and the driving insert 243 is more reliable by using the cooperation mode of the inclined guide hole.

[0035] The oblique extraction insert 242 is radially outwardly extended at the end of the bottom of the rear mold core fixed plate 22 to form an abutting portion, a reset spring 244 is arranged between the abutting portion and the rear mold core fixed plate 22, and the reset spring 244 applies an elastic force to the oblique extraction insert 242 away from the forming core 241. In this way, the reset spring 244 further ensures the reset of the oblique extraction insert 242, so that the reset of the oblique extraction insert 242 is more timely and less likely to be stuck. Of course, in other embodiments, the structure of the reset spring 244 can not be used.

[0036] The driving portion 247 includes a sliding block 245 and a first shovel base 246. The sliding block 245 is slidably arranged on the rear mold 12 and fixedly connected to the forming core 241. The first shovel base 246 is fixed on the front mold 11 and forms an inclined guide cooperation with the sliding block 245. The mold opening of the front mold 11 and the rear mold 12 drives the sliding block 245 to slide through the first shovel base 246 to drive the forming core 241 to core-pulling. In this embodiment, the first shovel base 246 is an inclined guide rod inclined to the Z axis, and an inclined guide hole is formed on the sliding block 245. The first shovel base 246 is fixed on the front mold 12 and inserted into the inclined guide hole of the sliding block 245. In this way, the core-pulling of the forming core 241 is driven by the mold opening 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 sliding block 245 and the forming core 241 are synchronously core-pulling through the first shovel base 246, without the need for external driving components to drive, simplifying the structure, and the action is more synchronous. Specifically, the cooperation of the sliding block 245 and the first shovel base 246 also synchronously drives the forming core 241 to insert into the injection cavity when the front mold 11 and the rear mold 12 are closed.

[0037] In this embodiment, the structure for driving the two rear mold core movable plates 23 to act is as follows: a second shovel base 27 is further included, the second shovel base 27 has two groups, and the two groups of second shovel bases 27 are fixed on the front mold 11 and respectively form inclined guide cooperation with the two rear mold core movable plates 23; the mold opening of the front mold 11 and the rear mold 12 respectively drives the two rear mold core movable plates 23 to laterally separate outward through the two groups of second shovel bases 27. That is, the action of the two rear mold core movable plates 23 is also driven by the mold opening and closing action of the front mold 11 and the rear mold 12. Further, the second shovel base 27 is an inclined guide rod inclined to the Z axis, and an inclined guide hole is arranged on the rear mold core movable plate 23. 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.

[0038] Furthermore, it also includes two mold closing drive blocks 25, which are fixed on the front mold 11 and located on the outer side of the two rear mold core movable plates 23 respectively. The inner side of the mold closing drive block 25 and the outer side of the corresponding rear mold core movable plate 23 form an inclined guide fit, that is, the inner side of the mold closing drive block 25 and the outer side of the rear mold core movable plate 23 both form inclined surfaces. When the front mold 11 and the rear mold 12 approach each other (i.e. when the mold is closed), the two rear mold core movable plates 23 not only move closer to each other through the cooperation of the second shovel base 27, but also, when the mold closing is about to be completed, the two rear mold core movable plates 23 are driven into place by the mold closing drive blocks 25 on both sides; the mold closing is more reliable.

[0039] Furthermore, the Figure 1 The outer side of product 1 also has a cavity 4. In this embodiment, the front mold 11 of the injection mold is further provided with a front mold side-pulling structure for forming the cavity 4. The front mold side-pulling structure includes a front mold slider 42, a front mold core 41, and a front mold drive 43. The front mold slider 42 is laterally slidably mounted on the front mold 11. One end of the front mold core 41 is fixed to the front mold slider 42, and the other end passes through the front mold core 21 to extend into the injection cavity, participating in the molding of the cavity 4 structure of product 1. The front mold drive 43 connects to the front mold slider 42 to drive the front mold slider 42 to slide, thereby achieving core pulling of the front mold core 41.

[0040] Specifically, the front mold drive component 43 is a third shovel base 44. The front mold 12 includes a first front template 111 and a second front template 112. The first front template 111 is detachably disposed on the surface of the second front template 112. The front mold core 21 and the front mold slider 42 are both disposed on the second front template 112. The third shovel base 44 is fixed on the first front template 111 and forms an oblique guide fit with the front mold slider 42. The second shovel base 27 is also fixed on the second front template 112. When the mold is opened, the first front template 111 and the second front template 112 are first separated. At this time, the third shovel base 44 drives the front mold slider 42 to slide outward, thereby realizing the core pulling of the front mold core 41. The structural design is simple and does not require additional drive components for driving. Of course, in other embodiments, if the product 1 does not have a cavity 4 structure, the injection mold may not need to design the above-mentioned front mold side pulling structure.

[0041] Further, in the embodiment, the front mold insert 31 is inclined to the Z-axis direction, so the mold opening action of the front mold 11 and the rear mold 12 cannot directly drive the front mold insert 31 to core-pulling. Therefore, in the embodiment, two structures are added, one is to add the structure of the driving spring 32, the 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 arranged between the front mold insert 31 and the second front mold plate 112 to apply a spring force to the front mold insert 31 in the direction of the first front mold plate 111, the second end of the front mold insert 31 passes through the second front mold plate 112 and the front mold core 21 in turn and extends into the injection cavity, and the second end of the front mold insert 31 extending into the injection cavity corresponds to the forming core 241. When the first front mold plate 111 and the second front mold plate 112 start to separate, the front mold insert 31 loses the fixation, at this time, the front mold insert 31 moves in the direction of the first front mold plate 111 under the action of the driving spring 32, so as to core-pulling. The second structure is that the side surface of the front mold insert 31 is also provided with a connecting notch 311, the first front mold plate 111 is fixed with a pulling block 33, and the pulling block 33 is inserted into the connecting 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 movement of the first front mold plate 111 in the Z-axis direction pulls the front mold insert 31 away through the pulling block 33, and when moving to a certain distance, the pulling block 33 is separated from the connecting notch 311 of the front mold insert 31. The two structures work together to make the core-pulling action of the front mold insert 31 more timely and reliable. Of course, in other embodiments, the two structures can be selected one of them, or when the product 1 has only one rear opening 3, the structure of the front mold insert 31 can also not be designed.

[0042] Although the utility model is specifically shown and introduced in combination with the preferred embodiment, it should be understood by those skilled in the art that various changes can be made to the utility model in form and detail without departing from the spirit and scope of the utility model defined in the appended claims, and all are within the protection scope of the utility model.

Claims

1. An injection mold with a back mold inclined pulling structure, comprising 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; characterized in that: The rear mold core includes a rear mold core fixing plate and two rear mold core movable plates. The rear mold core fixing plate is fixedly assembled on the rear mold. The two rear mold core movable plates are located on the surface of the rear mold core fixing plate and are arranged opposite each other and can move laterally. The front mold core, the rear mold core fixing plate, and the two rear mold core movable plates together enclose and form an injection cavity. It also includes a rear mold inclined pull structure. The rear mold inclined pull structure includes a driving part, a molding core, an inclined pull insert, and a driving insert. The driving part drives and connects to the molding core to drive the molding core to extend into or pull out of the injection cavity of the injection mold. The inclined pull insert is movably inserted through the rear mold core fixing plate and corresponds to the molding core. The driving insert is fixed on the rear mold core movable plate and forms an inclined guide fit with the inclined pull insert. The lateral outward movement of the rear mold core movable plate drives the inclined pull insert to retract away from the molding core through the driving insert.

2. The injection mold with a post-mold tapering extraction structure according to claim 1, characterized in that: The inclined pull insert has an inclined guide hole that is inclined to the direction of movement of the rear mold core movable plate. The drive insert passes through the inclined guide hole of the inclined pull insert and forms an inclined guide fit with the inclined pull insert.

3. The injection mold with a post mold tapering extraction structure of claim 1, wherein: The oblique insert extends radially outward from the end located at the bottom of the rear mold core fixing plate to form an abutment portion. A return spring is provided between the abutment portion and the rear mold core fixing plate. The return spring applies a spring force to the oblique insert away from the molding core.

4. The injection mold with a post mold tapering extraction structure of claim 1, wherein: The driving unit includes a slider and a first shovel base. The slider is slidably disposed on the rear mold and fixedly connected to the molding core. The first shovel base is fixed on the front mold and forms an oblique guide engagement with the slider. The opening of the front mold and the rear mold is achieved by the first shovel base driving the slider to slide, thereby driving the molding core to be pulled out.

5. The injection mold with a post-mold tapering extraction structure of claim 1, wherein: It also includes a second shovel base, which has two sets. The two sets of the second shovel base are fixed on the front mold and respectively form oblique guide cooperation with the two rear mold core movable plates; the opening of the front mold and the rear mold is achieved by the two sets of the second shovel base respectively driving the two rear mold core movable plates to separate laterally outward.

6. The injection mold with a post-mold tapering extraction structure according to claim 5, characterized in that: It also includes two mold closing drive blocks, which are fixed on the front mold and located on the outer side of the two rear mold core movable plates respectively. The inner side of the mold closing drive block and the outer side of the corresponding rear mold core movable plate form an oblique guide fit. When the front mold and the rear mold approach each other, the mold closing drive block and the second shovel base jointly drive the rear mold core movable plate to close into place.

7. The injection mold with a post mold tapering extraction structure of claim 5, wherein: The front mold is also provided with a front mold side-pull structure, which includes a front mold slider, a front mold core and a front mold drive component. The front mold slider is slidably mounted on the front mold. One end of the front mold core is fixed to the front mold slider, and the other end passes through the front mold core to extend into the injection cavity. The front mold drive component is connected to the front mold slider to drive the front mold slider to slide.

8. The injection mold with a post mold tapering extraction structure of claim 7, wherein: The front mold drive component is a third shovel base. The front mold includes a first front template and a second front template. The first front template is separably disposed on the surface of the second front template. The front mold core and the front mold slider are both disposed on the second front template. The third shovel base is fixed on the first front template and forms an oblique guide engagement with the front mold slider. The second shovel base is fixed on the second front template.

9. The injection mold with a post mold tapering extraction structure of claim 8, wherein: Also include a front mold insert and drive spring, the first end of the front mold insert is clamped between the first front mold plate and the second front mold plate, the drive spring is arranged between the front mold insert and the second front mold plate to apply a spring force to the front mold insert towards the first front mold plate, the second end of the front mold insert in turn through the second front mold plate and the front mold core into the injection cavity, the second end of the front mold insert into the injection cavity corresponds to the forming core.

10. The injection mold with a post-mold tapering extraction structure according to claim 9, characterized in that: The front mold insert is inclined to the opening and closing direction of the front mold and the rear mold, and a connecting notch is further formed in the side surface of the front mold insert. The first front mold plate is fixed with a pulling block, and the pulling block is inserted into the connecting notch of the front mold insert.

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