Injection mold with side inverted buckle forming mechanism

Abstract

The utility model discloses an injection mold with a side back-off molding mechanism, which comprises a mold frame and a mold core, a molding cavity is arranged in the mold core and is arranged in the mold frame, and the injection mold is characterized in that the side back-off molding mechanism is arranged in a front mold core of the mold core and comprises a nylon mold locker, a driving wedge and an inclined sliding block, the nylon mold locker is arranged on the top plate of the mold frame and is connected with the driving wedge, and the top plate drives the driving wedge to perform linear displacement along the mold opening movement direction through the nylon mold locker when performing mold opening movement; the inclined sliding block is connected with the driving wedge in a sliding mode, the driving wedge which conducts linear motion drives the inclined sliding block to conduct sliding displacement in the direction away from the forming cavity, and therefore forming machining of the side inverted buckle is completed. In the mold closing injection molding process, the sliding block slides in the reverse direction, the mold cannot be damaged, the technical problems existing in the prior art are solved, and the purpose of one-time lossless molding machining is achieved.

Description

An injection mold with a side-clamping molding mechanism Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to an injection mold with a side-clamping molding mechanism. Background Technology

[0002] As shown in Figure 1, the product has a large inner groove, and a side buckle is provided on the side of the large inner groove. The side buckle is opened at the side wall of the large inner groove and is a through groove that extends from the opening of the large inner groove to its bottom surface; the two side buckles are symmetrically distributed.

[0003] There are two main methods for injection molding to process the structural features of the product shown in Figure 1. One is the traditional processing method, which requires a secondary molding process for the side undercut structure after the product is first injection molded and demolded. The other processing method, in which a few molds can complete the molding process in one go, cannot retract the side undercut structure in time when the mold is closed again after demolding. This can easily lead to mold collision during the mold opening process, resulting in mold damage and rendering the mold unusable.

[0004] In summary, how to achieve the one-time, non-destructive molding process of the undercut is one of the technical problems that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an injection mold with a side-drip molding mechanism.

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

[0007] An injection mold with a side-clamping molding mechanism includes a mold frame and a mold core. The mold core has a molding cavity and is installed inside the mold frame. The side-clamping molding mechanism is characterized in that: a side-clamping molding mechanism is provided inside the front core of the mold core, and the side-clamping molding mechanism includes a nylon clamping device, a drive wedge, and a slanted slider, wherein:

[0008] The nylon mold clamp is mounted on the top plate of the mold frame and connected to the drive wedge. During the mold opening movement, the top plate drives the drive wedge to move linearly along the mold opening direction through the nylon mold clamp.

[0009] The inclined slider is slidably connected to the drive wedge. The drive wedge, which moves in a straight line, drives the inclined slider to slide away from the forming cavity to complete the side undercut forming process.

[0010] More preferably, the two inclined sliders are symmetrically distributed on both sides of the driving wedge;

[0011] The linear motion driving wedge drives the two inclined sliders to slide together.

[0012] More preferably, the drive wedge has a guide groove, and the inclined slider is provided with a drive rail adapted to the guide groove;

[0013] The inclined slider is slidably connected to the guide groove of the drive wedge via a drive slide rail.

[0014] More preferably, the drive wedge is provided with a limiting protrusion to limit the displacement distance of the drive wedge.

[0015] More preferably, the mold frame includes a front module and a rear module, the front module including a top plate, a front mold pad, and a front template, wherein:

[0016] The top plate is fixedly connected to the front mold pad;

[0017] The nylon mold clamp passes through the front mold pad and is fixedly connected to the top plate;

[0018] The drive wedge passes through the front template and connects to the nylon mold clamp.

[0019] More preferably, the inclined slider is placed in the embedding hole opened in the front mold core.

[0020] More preferably, the mold frame includes a rear module, the rear module includes a base plate, a square iron, and a rear template, the base plate, the square iron, and the rear template enclosing an ejection cavity;

[0021] The rear module also includes an ejection mechanism assembled in the ejection cavity. The ejection mechanism includes an ejection plate assembly and an ejector pin assembly. The ejector pin assembly is connected to the ejector plate assembly and is driven by the ejection plate assembly to perform ejection displacement.

[0022] More preferably, the ejector pin assembly includes an ejector pin, a sleeve ejector pin, and an angled ejector pin.

[0023] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0024] This invention utilizes a nylon mold clamping device to drive a drive wedge to move linearly along the mold opening direction, thereby driving the inclined slider to slide away from the product to pull the core. This enables the side-locking molding and demolding of the product. At the same time, during the mold closing and injection molding process, the slider slides in the opposite direction, which will not damage the mold. This solves the technical problems existing in the prior art and achieves the purpose of one-time non-destructive molding processing. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the product structure;

[0026] Figure 2 is a cross-sectional view of the internal structure of the injection mold with the side-dangling molding mechanism described in the embodiment of this utility model;

[0027] Figure 3 is a three-dimensional schematic diagram of the injection mold with the side undercut molding mechanism described in this embodiment of the present invention, after omitting the front mold assembly and the front mold core;

[0028] Figure 4 is a cross-sectional view of the internal structure of the injection mold with the side-dangling molding mechanism described in the embodiment of this utility model;

[0029] Figure 5 is a cross-sectional view of the internal structure of the injection mold with the side-dangling molding mechanism described in the embodiment of this utility model.

[0030] The markings on the accompanying drawings in the above specification are explained as follows:

[0031] A. Product; A1. Side buckle;

[0032] 110. Top plate; 120. Front mold pad; 130. Front mold plate; 140. Nylon mold clamp; 150. Drive wedge; 160. Angled slider; 171. Drive block; 172. Core; 181. Molding insert; 182. Molding rod;

[0033] 210. Base plate; 220. Square iron; 230. Rear template; 241. Ejector plate assembly; 242. Ejector sleeve; 243. Ejector pin; 244. Angled ejector pin;

[0034] 310. Anterior mold core; 320. Rear mold core. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Example

[0038] This utility model discloses an injection mold with a side-duck forming mechanism, the purpose of which is to process product A as shown in Figure 1.

[0039] As shown in Figure 1, product A is provided with a large inner groove. A side buckle A1 is provided on the side of the large inner groove. The side buckle A1 is opened at the side wall of the large inner groove. The side buckle A1 is a through groove that extends from the opening of the large inner groove to its bottom surface. The two side buckles A1 are symmetrically distributed.

[0040] As shown in Figure 2, the injection mold with the side-clamping molding mechanism includes a mold frame, a mold core, and a core-pulling mechanism. The mold frame includes a front mold assembly and a rear mold assembly that can be interlocked with each other. The mold core is provided with a molding cavity corresponding to product A as shown in Figure 1. It includes a front mold core 310 and a rear mold core 320 that are interlocked with each other. The front mold core 310 is installed in the front mold assembly, the rear mold core 320 is installed in the rear mold assembly, and the core-pulling mechanism is installed in the front mold assembly.

[0041] As shown in Figures 2, 4, and 5, the front module includes an adjacent top plate 110, a front mold pad 120, and a front template 130. The front mold pad 120 is disposed in close contact with the top plate 110 and the front template 130. An injection nozzle is also provided, which penetrates the top plate 110, the front mold pad 120, and the front template 130. The injection nozzle is connected to an injection molding machine. A front mold groove is provided on the side of the front template 130 facing away from the top plate 110. The front mold core 310 is inserted into the front mold groove and connected to the front template 130, so that the front mold core 310 and the front template 130 perform mold opening movements synchronously.

[0042] As shown in Figures 2, 4, and 5, the rear module includes a base plate 210, square iron blocks 220, a rear template 230, and an ejection mechanism. Two square iron blocks 220 are symmetrically distributed and erected on the base plate 210. The rear template 230 is fixed to the two square iron blocks 220. The base plate 210, the rear template 230, and the two square iron blocks 220 enclose an ejection cavity, into which the ejection mechanism is installed. The ejection mechanism includes an ejection plate assembly 241 and an ejector pin assembly. The ejector pin assembly is fixed to the ejection plate assembly 241, which is normally positioned close to the base plate 210. An ejection cylinder passes through the base plate 210 and connects to the top plate assembly 110, driving the ejection plate assembly 241 to move towards the rear template 230, thereby ejecting and demolding the formed product A. The rear template 230 has a rear mold groove facing the front module, and the rear mold core 320 is fixed in the rear mold groove, thereby connecting with the rear template 230 and being linked by the rear module.

[0043] It should be noted that the ejector pin assembly includes ejector pin 243, ejector sleeve ejector pin 242 and angled ejector pin 244. Ejector pin 243, ejector sleeve ejector pin 242 and angled ejector pin 244 are set at different positions corresponding to product A as shown in Figure 1, so as to adapt to ejecting the molded product A out of the mold and achieve the purpose of demolding product A.

[0044] It should be noted that, as shown in Figure 4, in order to effectively limit the ejection distance, a positioning block is provided on the ejection plate assembly 241. The positioning block is fixed on the ejection plate assembly 241 facing the rear template 230 and locked with screws, so as to achieve stable installation and convenient disassembly and replacement.

[0045] As shown in Figure 5, the core-pulling mechanism is installed inside the front module. The core-pulling mechanism includes a drive block 171 and a core 172; the drive block 171 is arranged along the mold opening direction of the front module, and a drive section is arranged on the drive block 171 away from the top plate 110. The drive section is inserted into the drive hole opened in the core 172 to drive the core 172 to perform core-pulling displacement. Specifically: The drive block 171 includes an integrally connected connecting section and a drive section. The connecting section is fixed to the top plate 110 by screws and sequentially passes through the front mold pad 120 and the front template 130, thus allowing it to move synchronously with the displacement of the top plate 110. The drive section is inclined in the direction away from the mold core. The core 172 has a forming section that extends into the forming cavity through the cavity between the front mold core 310 and the rear mold core 320, cooperating with the forming of the side through hole of product A. The core 172 has a drive hole that is adapted to the drive section of the drive block 171. With the above structure, during the mold opening movement of the front and rear mold groups, the drive section of the drive block 171 drives the core 172 to move in a square direction away from the mold core, thereby completing the core pulling displacement.

[0046] As shown in Figures 2, 3, and 4, a side-undercut forming mechanism is provided inside the front mold core 310. The side-undercut forming mechanism includes a nylon clamping device 140, a drive wedge 150, and a sliding block 160. The drive wedge 150 and the sliding block 160 are both embedded in the embedding holes provided in the front mold core 310. The embedding holes are through holes provided through the front mold core 310. The nylon clamping device 140 is provided through the front mold pad 120 and installed on the top plate 110. The nylon clamping device 140 is connected to the drive wedge 150. That is, the nylon clamping device 140 is provided along the mold opening direction of this injection mold, and its two ends are connected to the top plate 110 and the drive wedge 150 respectively. When the top plate 110 is in the mold opening movement, the nylon clamping device 140 drives the drive wedge 150 to move linearly along the mold opening direction, thereby driving the sliding block 160 to slide and displace, thereby realizing the demolding of the side-undercut A1.

[0047] More detailed: As shown in Figures 2 and 3, the two inclined sliders 160 are symmetrically distributed on both sides of the drive wedge 150, forming a molding assembly. This molding assembly is used to adapt to the large inner groove on product A as shown in Figure 1, so that the two inclined sliders 160 are provided with a molding structure adapted to the side undercut A1 molding. It should be noted that the side of the drive wedge 150 that is in close contact with the inclined slider 160 is the driving inclined surface. The two driving inclined surfaces are symmetrically distributed, so that the end of the drive wedge 150 facing the molding cavity forms a pointed structure design. Combined with the above structural design, during the mold opening movement of the front mold assembly and the rear mold assembly, the top plate 110 drives the drive wedge 150 to move linearly along the mold opening direction through the nylon mold clamp 140, thereby driving the two inclined sliders 160 to slide in the direction of mutual convergence, completing the molding and demolding of the two symmetrically distributed inclined grooves.

[0048] Preferably, the driving surface of the driving wedge 150 is provided with a guide groove, and each of the inclined sliders 160 is provided with a driving slide rail that is adapted to the guide groove, thereby effectively improving the accuracy of the driving sliding core pulling and the stability of the linkage.

[0049] To effectively limit the displacement of the drive wedge 150, as shown in Figures 3 and 4, a limiting protrusion is formed on the drive wedge 150. The limiting protrusion is integrally formed with the drive wedge 150 and is part of the drive wedge 150. As shown in Figure 4, a limiting groove adapted to the limiting protrusion is formed on the front template 130. The drive wedge 150, which moves linearly, drives the limiting protrusion into the limiting groove and moves linearly within the limiting groove. When it moves to the preset limit position, the limiting protrusion abuts against the side of the limiting groove, thereby effectively limiting the displacement of the drive wedge 150 and achieving precise limiting. As shown in Figure 4, preferably, there are two limiting protrusions, which are respectively set on different sides of the drive wedge 150 for synchronous limiting, which also greatly improves the stability of limiting. It should be noted that, as shown in the cross-sectional position of Figure 4, the ejector pins 243 and ejector sleeve pins 242 installed on the top plate 110 are adapted to accommodate the ejection and demolding of product A.

[0050] As shown in Figure 5, the front template 130 is also provided with a hole forming module, which includes a forming insert 181 and a forming rod 182. An oblique through hole adapted to the installation of the forming insert 181 is provided in the front template 130. This oblique through hole penetrates the front template 130, allowing the forming insert 181 installed in the oblique through hole to be close to the front mold core 310. The forming rod 182 is fixedly connected to the forming insert 181 and passes through the front mold core 310, forming a through hole that communicates with the forming cavity, for forming the through hole on product A. Specifically, as shown in Figure 5, the forming insert 181 is fixed on the front mold pad 120 and placed in the oblique through hole of the front mold core 310. It should be noted that the front mold insert is inclined, and a limiting protrusion is provided at one end near the front mold core 310. This limiting protrusion is part of the molding insert 181. The side of the inclined through hole has a groove to cooperate with the limiting protrusion, thereby limiting the displacement of the molding insert 181. When the front mold pad 120 is separated from the front template 130, the front template 130 drives the molding insert 181 to move synchronously. The hole forming module moves synchronously or stops moving synchronously with the front template 130. It should be noted that, as shown in Figure 5, the ejector pins 243, sleeve ejector pins 242, and inclined ejector pins 244 are visually distributed in combination in the cross-sectional view at the next position to adapt to the molding and ejection demolding of various positions of product A.

[0051] Referring to Figures 2 to 5, based on the above structural configuration, an injection mold with a side-clamping molding mechanism is obtained. The demolding distance of product A from this injection mold is as follows:

[0052] Step 1: Mold making;

[0053] The front module drives the front mold core 310 to separate from the rear mold core 320 in the rear module. It should be noted that the top plate 110 and the front mold pad 120 separate before the front mold plate 130. The following actions are completed during the separation process:

[0054] 1. The top plate 110 drives the drive block 171 to perform the mold opening movement. The drive block 171, which is driven to move linearly along the mold opening direction, drives the core 172 to perform the core pulling movement in the direction away from the mold core.

[0055] 2. The top plate 110 drives the drive wedge 150 to move linearly along the mold opening direction through the nylon mold clamping device 140, thereby driving the two inclined sliders 160 to move relative to each other, thereby realizing the molding and demolding of the inclined groove;

[0056] In summary, after the top plate 110 and the front mold pad 120 have completed a certain distance of mold opening movement, the limiting protrusion is used to drive the front template 130 and the front mold core 310 to continue the mold opening movement synchronously. The front template 130 drives the forming insert 181 to be pulled out obliquely along the direction of the oblique through hole, thereby driving the forming rod 182 to complete the forming process of the through hole, thus completing the mold opening operation.

[0057] Step 2: Eject;

[0058] The ejector cylinder passes through the base plate 210 and is connected to the ejector plate assembly 241. The ejector plate assembly 241 drives the ejector pin 243, the ejector sleeve pin 242 and the angled ejector to perform ejection operations synchronously, thereby ejecting product A from the mold core and demolding it, thus achieving the purpose of demolding product A.

[0059] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An injection mold with a side-clamping molding mechanism, comprising a mold frame and a mold core, wherein the mold core has a molding cavity and is fitted into the mold frame, characterized in that: The front mold core of the mold is provided with a side undercut forming mechanism, which includes a nylon mold clamp, a drive wedge, and a slanted slider. The nylon mold clamp is mounted on the top plate of the mold frame and connected to the drive wedge. During the mold opening movement, the top plate drives the drive wedge to move linearly along the mold opening direction through the nylon mold clamp. The slanted slider is slidably connected to the drive wedge. The linearly moving drive wedge drives the slanted slider to slide away from the forming cavity to complete the side undercut forming process.

2. The injection mold with a side-buckling molding mechanism according to claim 1, characterized in that: The two inclined sliders are symmetrically distributed on both sides of the driving wedge; the linearly moving driving wedge drives the two inclined sliders to slide together.

3. An injection mold with a side-duck forming mechanism according to claim 1 or 2, characterized in that: The drive wedge has a guide groove, and the inclined slider is provided with a drive rail adapted to the guide groove; the inclined slider is slidably connected to the guide groove of the drive wedge through the drive rail.

4. The injection mold with a side-buckling molding mechanism according to claim 1, characterized in that: The drive wedge is provided with a limit protrusion to limit the displacement distance of the drive wedge.

5. An injection mold with a side-buckling molding mechanism according to claim 1, characterized in that: The mold frame includes a front module and a rear module. The front module includes a top plate, a front mold pad, and a front template, wherein: the top plate is fixedly connected to the front mold pad; the nylon mold clamp passes through the front mold pad and is fixedly connected to the top plate; and the drive wedge passes through the front template and is connected to the nylon mold clamp.

6. An injection mold with a side-buckling molding mechanism according to claim 5, characterized in that: The inclined slider is placed in the embedding hole opened in the front mold core.

7. An injection mold with a side-buckling molding mechanism according to claim 1 or 5, characterized in that: The mold frame includes a rear mold assembly, which includes a base plate, square iron, and a rear template. The base plate, square iron, and rear template enclose an ejection cavity. The rear mold assembly also includes an ejection mechanism assembled at the ejection cavity. The ejection mechanism includes an ejection plate assembly and an ejector pin assembly. The ejector pin assembly is connected to the ejector plate assembly and is driven by the ejection plate assembly to perform ejection displacement.

8. An injection mold with a side-buckling molding mechanism according to claim 7, characterized in that: The ejector pin assembly includes an ejector pin, a sleeve ejector pin, and an oblique ejector pin.

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