Side core-pulling type shell injection mold

Abstract

The utility model discloses a side core-pulling type shell injection mold which comprises an upper mold, a lower mold, a first hole forming sliding block structure, a second hole forming sliding block structure, a side core-pulling mechanism and a glue injection mechanism, the upper mold is provided with an upper mold core, the bottom of the upper mold core is provided with a first forming surface, the lower mold is provided with a lower mold core, and the top of the lower mold core is provided with a second forming surface; a third forming face is arranged on the side, close to the lower mold core, of the first sliding block, and a through hole forming part is arranged on the third forming face. The side, close to the lower mold core, of the insert is provided with a fourth forming face, the end, close to the insert, of the second sliding block is connected with a core used for forming an inner cavity of a shell, the core penetrates through the insert to be arranged between the upper mold core and the lower mold core, and the side, close to the lower mold core, of the third sliding block is provided with a fifth forming face. The top of the third sliding block is downwards provided with a glue inlet runner exposed out of the fifth forming face. Glue can be fed from the side face of the shell, water gap marks are prevented from being left on the top face of the shell, and the attractiveness of the shell is better.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a side-pulling type shell injection mold. Background Technology

[0002] Injection molds are tools used to produce plastic products, and they also give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and then obtaining the molded product after cooling and solidification.

[0003] When manufacturing complex housing structures, deep grooves are cut into the sides of the housing, and a mounting part with a through groove is provided at the bottom. This type of housing structure has a large length dimension. In mold design, the opening of the deep groove is usually oriented downwards for vertical demolding. The overall vertical dimension of this type of injection mold is too large, which increases the mold manufacturing cost. If a side core pulling method is used to demold the deep groove horizontally, the injection will leave a sprue mark on the top surface of the housing, affecting the aesthetics of the housing. Therefore, how to rationally design the injection mold to improve the aesthetics of the housing and reduce the mold manufacturing cost is a key research direction in the industry.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0005] In view of the above, this utility model addresses the deficiencies of the existing technology and its main objective is to provide a side-pulling type shell injection mold. By incorporating a side-pulling mechanism, the mold can be demolded through side-pulling, which facilitates internal layout and makes the overall design more compact. It is further complemented by a glue injection mechanism opposite to the side-pulling mechanism. The glue injection mechanism includes a third slider, the top of which has a glue inlet channel exposed on the fifth molding surface. Positioning the glue inlet channel on the third slider allows glue to be injected from the side of the shell, avoiding sprue marks on the top surface and improving the shell's aesthetics. Simultaneously, a sprue ejector component is provided at the bottom of the third slider corresponding to the glue inlet channel, facilitating sprue removal. The structural design is ingenious. Furthermore, a through-hole forming part is provided on the first slider, allowing the shell to be formed directly in one step, avoiding the need for subsequent through-groove processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A side-pulling core type injection mold for a housing includes an upper mold, a lower mold, a first hole forming slider structure, a second hole forming slider structure, a side-pulling core mechanism, and an injection mechanism. The upper mold is provided with an upper mold core, and the bottom of the upper mold core is provided with a first forming surface. The lower mold is provided with a lower mold core, and the top of the lower mold core is provided with a second forming surface.

[0008] The first hole forming slider structure and the second hole forming slider structure are disposed on opposite sides of the lower mold core. Both the first hole forming slider structure and the second hole forming slider structure include a first slider, a first shovel base for locking the first slider, and a first inclined guide post for driving the first slider to slide. The first slider is slidably disposed on the lower mold. A third forming surface is provided on the side of the first slider near the lower mold core. The third forming surface is provided with a through hole forming part. The first shovel base and the first inclined guide post are both disposed on the upper mold.

[0009] The side core-pulling mechanism and the glue injection mechanism are located on opposite sides of the lower mold core. The side core-pulling mechanism includes an insert, a second slider, a hydraulic cylinder for driving the second slider to slide, and a second shovel base for locking the second slider. The insert is located on the side of the lower mold core. A fourth forming surface is provided on the side of the insert near the lower mold core. The second slider is slidably located in the lower mold. A core for forming the inner cavity of the shell is connected to the end of the second slider near the insert. The core passes through the insert and is placed between the upper mold core and the lower mold core. The second shovel base is located in the upper mold.

[0010] The injection mechanism includes a third slider, a third shovel base for locking the third slider, and a second inclined guide post for driving the third slider to slide. The third slider is slidably disposed in the lower mold. A fifth molding surface is provided on the side of the third slider near the lower mold core. A glue inlet channel is opened downward on the top of the third slider and exposed on the fifth molding surface. A sprue ejection assembly is provided at the bottom of the third slider corresponding to the glue inlet channel. The third shovel base and the second inclined guide post are both disposed in the upper mold.

[0011] The first molding surface, the second molding surface, the third molding surface, the fourth molding surface, the fifth molding surface, the core, and the through-hole molding part together form an injection mold cavity for molding the shell.

[0012] As a preferred embodiment, the upper mold includes a top plate, a hot runner plate, and an upper template arranged sequentially from top to bottom. The hot runner plate is connected to the glue inlet channel through the gating channel. The first shovel base, the second shovel base, the third shovel base, the first inclined guide post, and the second inclined guide post are all fixed on the upper template. The second shovel base is fixed to the bottom of the hot runner plate and passes downward through the upper template.

[0013] As a preferred embodiment, the bottom of the upper template is recessed upwards with a first groove, the top of the second slider extends into the first groove, the bottom of the upper mold core is recessed upwards with a second groove, and the top of the insert extends into the second groove.

[0014] As a preferred embodiment, the lower mold includes a mounting plate, a lower template, and a base plate arranged sequentially from top to bottom. The first slider, the second slider, and the third slider are all disposed on the mounting plate, and the lower mold core is disposed on the lower template and passes upward through the mounting plate.

[0015] As a preferred embodiment, the sprue ejection assembly includes a first ejector rod, an ejector rod mounting base, a second ejector rod, and an ejection plate. The ejector rod mounting base is disposed at the bottom of the third slider. The first ejector rod is slidably disposed in the ejector rod mounting base and constrained by the bottom wall of the ejector rod mounting base. A first spring is sleeved on the outer periphery of the first ejector rod for pressing the first ejector rod against the bottom wall of the ejector rod mounting base. The mounting plate has a first clearance groove that passes vertically through the ejector rod mounting base for sliding clearance. The ejection plate is movably disposed on the base plate. A second spring is disposed between the ejection plate and the upper template for driving the ejection plate to return to its downward position. The second ejector rod is disposed on the ejection plate and can pass through the upper template to push the first ejector rod upward.

[0016] As a preferred embodiment, the second push rod protrudes into the first clearance groove, and correspondingly, the bottom wall of the push rod mounting base is provided with a second clearance groove for the second push rod to pass through.

[0017] As a preferred embodiment, a product ejection structure is provided between the lower template and the base plate. The product ejection structure includes an upper top plate, a lower top plate, and multiple third ejector rods, with the third ejector rods passing upward through the lower template and the lower mold core.

[0018] As a preferred embodiment, the mounting plate extends outward from the side of the mounting plate and protrudes from the outer periphery of the lower template. The hydraulic cylinder is fixed to the side of the extension plate away from the mounting plate. A first position sensor and a second position sensor are provided on the extension plate. Correspondingly, a first sensing element corresponding to the first position sensor and a second sensing element corresponding to the second position sensor are provided on the second slider.

[0019] As a preferred embodiment, the through-hole forming part is provided with two holes arranged at a distance.

[0020] As a preferred embodiment, the fifth forming surface is provided with two spaced hole forming parts, which can extend into the core.

[0021] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0022] The main features include a side core-pulling mechanism that allows for mold release via side core-pulling, facilitating mold layout and resulting in a more compact overall design. It is complemented by a corresponding injection mechanism, which includes a third slider with a downward-facing injection channel exposed on the fifth molding surface. This injection channel allows for injection from the side of the shell, preventing sprue marks from appearing on the top surface and improving the shell's aesthetics. Additionally, a sprue ejector assembly is located at the bottom of the third slider to facilitate sprue removal. The design is ingenious. Furthermore, a through-hole forming section on the first slider allows for one-time molding of the shell, eliminating the need for subsequent slot processing.

[0023] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a perspective view of a preferred embodiment of the present utility model;

[0025] Figure 2 This is a cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0026] Figure 3 This is another cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0027] Figure 4 This is a three-dimensional schematic diagram of the lower mold of a preferred embodiment of the present invention;

[0028] Figure 5 This is a three-dimensional schematic diagram of the upper mold of a preferred embodiment of the present invention;

[0029] Figure 6 yes Figure 2 A magnified view of a portion of point A in the middle.

[0030] Explanation of reference numerals in the attached diagram:

[0031] 10. Upper mold 11. Upper mold core

[0032] 111. First molding surface; 112. Second groove

[0033] 12. Top plate 13. Hot runner plate

[0034] 131. Casting runner; 14. Upper formwork.

[0035] 141. First groove 20. Lower mold

[0036] 21. Lower mold core; 211. Second molding surface

[0037] 22. Mounting plate; 221. Extension plate

[0038] 222. First clearance groove; 23. Lower template

[0039] 24. Base plate 25. Product ejection structure

[0040] 251. Upper Top Plate 252. Lower Top Plate

[0041] 253, Third push rod 30, First hole forming slider structure

[0042] 31. First slider; 311. Third forming surface

[0043] 312, Through-hole forming part; 32, First shovel base

[0044] 33. First inclined guide post; 40. Second hole forming slider structure

[0045] 50. Side core-pulling mechanism; 51. Insert.

[0046] 511. Fourth forming surface; 52. Second slider

[0047] 521, Core; 522, First Sensing Component

[0048] 523, Second sensing element; 53, Hydraulic cylinder

[0049] 54. Second shovel base; 60. Glue injection mechanism

[0050] 61. Third slider; 611. Fifth forming surface

[0051] 612. Glue inlet channel; 613. Hole forming section

[0052] 62. Third shovel base; 63. Second inclined guide column

[0053] 64. Sprue ejection assembly; 641. First ejector rod

[0054] 642. Top rod mounting bracket; 643. Second top rod

[0055] 644. Ejector plate; 645. First spring

[0056] 646. Second spring; 647. Second clearance groove

[0057] 70. First position sensor; 80. Second position sensor. Detailed Implementation

[0058] First, it should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] Please refer to Figures 1 to 6 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including an upper mold 10, a lower mold 20, a first hole forming slider structure 30, a second hole forming slider structure 40, a side core pulling mechanism 50, and a glue injection mechanism 60.

[0060] The upper mold 10 is provided with an upper mold core 11, and the bottom of the upper mold core 11 is provided with a first forming surface 111; specifically, the upper mold 10 includes a top plate 12, a hot runner plate 13, and an upper template 14 arranged sequentially from top to bottom, and the hot runner plate 13 has a gating channel 131.

[0061] The lower mold 20 is provided with a lower mold core 21, and the top of the lower mold core 21 is provided with a second forming surface 211; specifically, the lower mold 20 includes a mounting plate 22, a lower template 23, and a base plate 24 arranged sequentially from top to bottom; see reference Figure 1 and Figure 2 As shown, a product ejection structure 25 is provided between the lower template 23 and the base plate 24. The product ejection structure 25 includes an upper top plate 251, a lower top plate 252 and a plurality of third ejector rods 253. The third ejector rods 253 pass upward through the lower template 23 and the lower mold core 21. An extension plate 221 protruding from the outer periphery of the lower template 23 extends outward from the side of the mounting plate 22.

[0062] The first hole forming slider structure 30 and the second hole forming slider structure 40 are disposed on opposite sides of the lower mold core 21. Both the first hole forming slider structure 30 and the second hole forming slider structure 40 include a first slider 31, a first shovel base 32 for locking the first slider 31, and a first inclined guide post 33 for driving the first slider 31 to slide. The first slider 31 is slidably disposed on the lower mold 20. A third forming surface 311 is provided on the side of the first slider 31 closest to the lower mold core 21. The third forming surface 311 is provided with a through hole forming part 312. The first shovel base 32 and the first inclined guide post 33 are both disposed on the upper mold 10.

[0063] The side core-pulling mechanism 50 and the glue injection mechanism 60 are disposed on the other opposite sides of the lower mold core 21. The side core-pulling mechanism 50 includes an insert 51, a second slider 52, a hydraulic cylinder 53 for driving the second slider 52 to slide, and a second shovel base 54 for locking the second slider 52. The insert 51 is disposed on the side of the lower mold core 21. A fourth forming surface 511 is provided on the side of the insert 51 near the lower mold core 21. The second slider 52 is slidably disposed on the lower mold 20. A core 521 for forming the inner cavity of the shell is connected to one end of the second slider 52 near the insert 51. The core 521 passes through the insert 51 and is placed between the upper mold core 11 and the lower mold core 21. The second shovel base 54 is disposed on the upper mold 10.

[0064] The injection mechanism 60 includes a third slider 61, a third shovel base 62 for locking the third slider 61, and a second inclined guide post 63 for driving the third slider 61 to slide. The third slider 61 is slidably disposed on the lower mold 20. A fifth molding surface 611 is provided on the side of the third slider 61 near the lower mold core 21. The top of the third slider 61 has a downward-facing injection channel 612 exposed on the fifth molding surface 611. The injection channel 612 is horn-shaped. A sprue ejection assembly 64 is provided at the bottom of the third slider 61 corresponding to the injection channel 612. The third shovel base 62 and the second inclined guide post 63 are both disposed on the upper mold 10.

[0065] The first molding surface 111, the second molding surface 211, the third molding surface 311, the fourth molding surface 511, the fifth molding surface 611, the core 521, and the through-hole molding part 312 together form an injection mold cavity for molding the shell.

[0066] Specifically, see Figure 2 , Figure 3 , Figure 5 As shown, the hot runner plate 13 is connected to the glue inlet runner 612 through the gating runner 131. The first shovel base 32, the second shovel base 54, the third shovel base 62, the first inclined guide post 33, and the second inclined guide post 63 are all fixed on the upper mold plate 14. The second shovel base 54 is fixed to the bottom of the hot runner plate 13 and passes downward through the upper mold plate 14. The bottom of the upper mold plate 14 is recessed upward with a first groove 141. The top of the second slider 52 extends into the first groove 141. The bottom of the upper mold core 11 is recessed upward with a second groove 112. The top of the insert 51 extends into the second groove 112.

[0067] See Figure 2 and Figure 4As shown, the first slider 31, the second slider 52, and the third slider 61 are all mounted on the mounting plate 22. The lower mold core 21 is mounted on the lower template 23 and passes upward through the mounting plate 22. The through-hole forming part 312 is provided with two spaced parts. The fifth forming surface 611 is provided with two spaced hole forming parts 613, and the hole forming parts 613 can extend into the core 521.

[0068] The hydraulic cylinder 53 is fixed to the side of the extension plate 221 away from the mounting plate 22. The extension plate 221 is provided with a first position sensor 70 and a second position sensor 80. Correspondingly, the second slider 52 is provided with a first sensing element 522 corresponding to the first position sensor 70 and a second sensing element 523 corresponding to the second position sensor 80.

[0069] See Figure 2 and Figure 6 As shown, the sprue ejection assembly 64 includes a first ejector rod 641, an ejector rod mounting base 642, a second ejector rod 643, and an ejection plate 644. The ejector rod mounting base 642 is disposed at the bottom of the third slider 61. The first ejector rod 641 is slidably disposed in the ejector rod mounting base 642 and is constrained by the bottom wall of the ejector rod mounting base 642. A first spring 645 is sleeved on the outer periphery of the first ejector rod 641 for pressing the first ejector rod 641 against the bottom wall of the ejector rod mounting base 642. The mounting plate 22 has a first clearance groove 222 that passes vertically through the ejector rod mounting base 642 for sliding clearance. The ejection plate 644 is movably disposed on the base plate 24. A second spring 646 is disposed between the ejection plate 644 and the upper template 14 for driving the ejection plate 644 to return downward. The second ejector rod 643 is disposed on the ejection plate 644 and can pass through the upper template 14 to push the first ejector rod 641 upward.

[0070] Specifically, the second push rod 643 protrudes into the first clearance groove 222, and correspondingly, the bottom wall of the push rod mounting base 642 is provided with a second clearance groove 647 for the second push rod 643 to pass through.

[0071] The key design feature of this utility model is:

[0072] The main features include a side core-pulling mechanism that allows for mold release via side core-pulling, facilitating mold layout and resulting in a more compact overall design. It is complemented by a corresponding injection mechanism, which includes a third slider with a downward-facing injection channel exposed on the fifth molding surface. This injection channel allows for injection from the side of the shell, preventing sprue marks from appearing on the top surface and improving the shell's aesthetics. Additionally, a sprue ejector assembly is located at the bottom of the third slider to facilitate sprue removal. The design is ingenious. Furthermore, a through-hole forming section on the first slider allows for one-time molding of the shell, eliminating the need for subsequent slot processing.

[0073] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A side-pulling type shell injection mold, characterized in that: The system includes an upper mold, a lower mold, a first hole forming slider structure, a second hole forming slider structure, a side core-pulling mechanism, and a glue injection mechanism. The upper mold is provided with an upper mold core, and the bottom of the upper mold core is provided with a first forming surface. The lower mold is provided with a lower mold core, and the top of the lower mold core is provided with a second forming surface. The first hole forming slider structure and the second hole forming slider structure are disposed on opposite sides of the lower mold core. Both the first hole forming slider structure and the second hole forming slider structure include a first slider, a first shovel base for locking the first slider, and a first inclined guide post for driving the first slider to slide. The first slider is slidably disposed on the lower mold. A third forming surface is provided on the side of the first slider near the lower mold core. The third forming surface is provided with a through hole forming part. The first shovel base and the first inclined guide post are both disposed on the upper mold. The side core-pulling mechanism and the glue injection mechanism are located on opposite sides of the lower mold core. The side core-pulling mechanism includes an insert, a second slider, a hydraulic cylinder for driving the second slider to slide, and a second shovel base for locking the second slider. The insert is located on the side of the lower mold core. A fourth forming surface is provided on the side of the insert near the lower mold core. The second slider is slidably located in the lower mold. A core for forming the inner cavity of the shell is connected to the end of the second slider near the insert. The core passes through the insert and is placed between the upper mold core and the lower mold core. The second shovel base is located in the upper mold. The injection mechanism includes a third slider, a third shovel base for locking the third slider, and a second inclined guide post for driving the third slider to slide. The third slider is slidably disposed in the lower mold. A fifth molding surface is provided on the side of the third slider near the lower mold core. A glue inlet channel is opened downward on the top of the third slider and exposed on the fifth molding surface. A sprue ejection assembly is provided at the bottom of the third slider corresponding to the glue inlet channel. The third shovel base and the second inclined guide post are both disposed in the upper mold. The first molding surface, the second molding surface, the third molding surface, the fourth molding surface, the fifth molding surface, the core, and the through-hole molding part together form an injection mold cavity for molding the shell.

2. The side-pulling type housing injection mold according to claim 1, characterized in that: The upper mold includes a top plate, a hot runner plate, and an upper template arranged sequentially from top to bottom. The hot runner plate is connected to the glue inlet channel through the pouring channel. The first shovel base, the second shovel base, the third shovel base, the first inclined guide post, and the second inclined guide post are all fixed on the upper template. The second shovel base is fixed to the bottom of the hot runner plate and passes downward through the upper template.

3. The side-pulling type shell injection mold according to claim 2, characterized in that: The bottom of the upper template is recessed upwards with a first groove, the top of the second slider extends into the first groove, the bottom of the upper mold core is recessed upwards with a second groove, and the top of the insert extends into the second groove.

4. The side-pulling type housing injection mold according to claim 1, characterized in that: The lower mold includes a mounting plate, a lower template, and a base plate arranged sequentially from top to bottom. The first slider, the second slider, and the third slider are all disposed on the mounting plate. The lower mold core is disposed on the lower template and passes upward through the mounting plate.

5. A side-pulling type housing injection mold according to claim 4, characterized in that: The sprue ejection assembly includes a first ejector rod, an ejector rod mounting base, a second ejector rod, and an ejection plate. The ejector rod mounting base is located at the bottom of the third slider. The first ejector rod is slidably mounted in the ejector rod mounting base and is constrained by the bottom wall of the ejector rod mounting base. A first spring is sleeved on the outer periphery of the first ejector rod to press the first ejector rod against the bottom wall of the ejector rod mounting base. The mounting plate has a first clearance groove that passes through vertically to allow the ejector rod mounting base to slide and avoid. The ejection plate is movably mounted on the base plate. A second spring is provided between the ejection plate and the upper template to drive the ejection plate to reset downwards. The second ejector rod is mounted on the ejection plate and can pass through the upper template to push the first ejector rod upwards.

6. A side-pulling type housing injection mold according to claim 5, characterized in that: The second push rod protrudes into the first clearance groove, and correspondingly, the bottom wall of the push rod mounting seat is provided with a second clearance groove for the second push rod to pass through.

7. A side-pulling type housing injection mold according to claim 4, characterized in that: A product ejection structure is provided between the lower template and the base plate. The product ejection structure includes an upper top plate, a lower top plate, and multiple third ejector rods. The third ejector rods pass upward through the lower template and the lower mold core.

8. A side-pulling type housing injection mold according to claim 4, characterized in that: The mounting plate extends outward from the side of the mounting plate, with an extension plate protruding from the outer periphery of the lower template. The hydraulic cylinder is fixed to the side of the extension plate away from the mounting plate. A first position sensor and a second position sensor are provided on the extension plate. Correspondingly, a first sensing element corresponding to the first position sensor and a second sensing element corresponding to the second position sensor are provided on the second slider.

9. A side-pulling type shell injection mold according to claim 1, characterized in that: The through-hole forming part has two holes arranged at a distance.

10. A side-pulling type shell injection mold according to claim 1, characterized in that: The fifth forming surface is provided with two hole forming parts arranged at a distance, and the hole forming parts can extend into the core.

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