In-mold cutting mechanism and injection mold

Abstract

The utility model relates to a kind of in-mold cutting mechanism and injection mold thereof, in-mold cutting mechanism includes cutter, guide cutting sleeve and drive group, the cutter is connected with drive group, and by drive group drive and carry out cutting movement along the opening mould direction;Guide cutting sleeve is set up guide cutting groove, cutter is extended into guide cutting groove, and reciprocating linear cutting movement is carried out in guide cutting groove;The cutter has obliquely arranged blade, the guide cutting sleeve is set up pad groove corresponding blade one end, and the pad groove is the part of cavity for glue injection introduction. The utility model realizes excess material efficient and automatic cutting by cutter along the opening mould direction movement, effectively avoids the problem that artificial pruning is needed after forming, to greatly improve processing efficiency, reduce processing cost, improve product processing quality.

Description

Technical Field

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

[0002] like Figure 1 Product A shown has a thin-walled shell structure with several through holes. Due to these structural features, the gate B is enlarged in injection molding to increase the flowability of the injection molding compound and to effectively fill the mold cavity quickly. After cooling and molding, the enlarged gate B forms a larger piece of excess material. This excess material is removed from the mold along with the finished product and requires manual trimming to obtain the desired finish. Figure 1 The product shown clearly has the disadvantages of product A, such as low processing efficiency and high processing cost.

[0003] Therefore, how to effectively solve the technical problem of automatic in-mold trimming is one of the technical problems that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model is to provide an in-mold cutting mechanism and an injection mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An in-mold cutting mechanism includes a cutter, a guide sleeve, and a drive assembly, wherein:

[0007] The cutter is connected to the drive assembly and is driven by the drive assembly to perform a cutting motion along the mold opening direction;

[0008] The guide sleeve has a guide groove, and the cutter extends into the guide groove and performs a reciprocating linear cutting motion within the guide groove.

[0009] The cutter has an inclined blade, and the guide sleeve has a groove at one end corresponding to the blade. This groove is part of the cavity for injecting and introducing adhesive.

[0010] More preferably, the cutter is fixed on the cutter drive seat, and the cutter drive seat is located at the drive end of the drive assembly.

[0011] A further preferred option includes a limiting seat;

[0012] The limiting seat is placed on the cutter drive seat and is located close to the guide sleeve;

[0013] A limiting rod is inserted into the limiting seat, and there is a distance between the limiting rod and the cutter drive seat to meet the requirements of the material removal movement.

[0014] More preferably, the drive assembly includes a pneumatic drive body and an ejector rod, wherein the pneumatic drive body drives the cutter to perform a cutting motion via the ejector rod.

[0015] More preferably, the ejector rod is equipped with a spring.

[0016] An injection mold includes a mold frame and a mold core, wherein the mold core is provided with a product molding cavity and is installed in the mold frame, characterized in that: it further includes an in-mold cutting mechanism installed in the mold frame, wherein the in-mold cutting mechanism is the aforementioned in-mold cutting mechanism.

[0017] More preferably, the mold frame is also equipped with a core-pulling mechanism, which is installed in the front module of the mold frame.

[0018] In a further preferred embodiment, the front mold core of the mold core has a residual material forming groove, which is aligned with the pad groove to form a slow-flow cavity.

[0019] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This invention designs an in-mold cutting mechanism that uses a cutter moving along the mold opening direction to efficiently and automatically remove excess material, effectively avoiding the need for manual trimming after molding, thereby greatly improving processing efficiency, reducing processing costs, and enhancing product quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the product structure;

[0022] Figure 2 This is a three-dimensional structural schematic diagram of the in-mold cutting mechanism described in this embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of the cutter described in this embodiment of the utility model;

[0024] Figure 4 yes Figure 3 The front view of the structure shown;

[0025] Figure 5 yes Figure 4 Side view of the structure shown;

[0026] Figure 6 This is a three-dimensional schematic diagram of the guide sleeve described in the embodiment of this utility model;

[0027] Figure 7 This is a schematic diagram of the internal structure of the injection mold described in this embodiment of the utility model. Figure 1 ;

[0028] Figure 8This is a schematic diagram of the internal structure of the injection mold described in this embodiment of the utility model. Figure 2 .

[0029] The markings on the accompanying drawings in the above specification are explained as follows:

[0030] A. Product; B. Gate; C. Residual material;

[0031] 110. Top plate; 120. Front mold pad; 130. Front template;

[0032] 210. Base plate; 220. Square iron; 230. Rear template; 241. Ejector plate assembly; 242. Ejector pin; 243. Angled ejector;

[0033] 310. Anterior mold core; 320. Rear mold core;

[0034] 410. Cutting blade; 411. Blade; 420. Guide sleeve; 421. Guide groove; 422. Pad groove; 430. Cutting blade drive seat; 440. Ejector rod; 441. Limit seat; 442. Limit rod; 450. Fixing plate; 460. Spring;

[0035] 510. Core-pulling drive block; 520. Core-pulling slider; 530. Core. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] Example

[0039] like Figure 1 Product A shown has a thin-walled shell structure with several through holes. Due to these structural features, the gate B is enlarged in the injection molding mold to increase the flowability of the injection molding compound and to effectively fill the mold cavity quickly. After cooling and molding, the enlarged gate B forms a larger piece of excess material C, which needs to be manually cut. (See...) Figure 1 If the through-hole size of product A is small, the manual trimming technique is required to ensure the yield of product A.

[0040] like Figure 2 As shown, in order to effectively increase the processing efficiency of product A and reduce the difficulty of manual operation, a structure for cutting the aforementioned material is designed inside the injection mold, namely: an in-mold cutting mechanism. The in-mold cutting mechanism includes a drive group and a cutting group. The drive group is connected to the cutting group and drives the cutting group to complete the expected cutting inside the injection mold.

[0041] like Figure 2 As shown, the drive assembly includes an air pipe, a pneumatic drive body, and an ejector rod 440. The air pipe is connected to the pneumatic drive body, and the ejector rod 440 is stacked on the pneumatic drive body and driven by the pneumatic drive body to perform cutting displacement. Specifically, in this embodiment, multiple air pipes are provided, and adjacent air pipes are connected to form an air pipe group. The air pipe group has an air inlet that is connected to the atmosphere. The pneumatic drive body can be a cylinder, and the air inlet section of the cylinder is connected to the air outlet of the air pipe group. The ejector rod 440 is placed at the output section of the cylinder. The pneumatic cylinder drives the ejector rod 440 to reciprocate along the axial direction of the ejector rod 440, thereby realizing the drive of the cutting assembly to complete in-mold cutting.

[0042] like Figure 2 As shown, the cutting assembly includes a cutter 410 and a guide sleeve 420. The cutter 410 is connected to the drive assembly and is driven to move along the axis of the ejector rod 440 to perform a cutting motion. The guide sleeve 420 is fixedly installed inside the mold, and the cutter 410 passes through the guide sleeve 420 to complete the cutting motion, ensuring the accuracy of the cutting direction of the cutter 410.

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, one end of the cutter 410 is connected to the drive assembly, and the other end is the cutting edge 411 of the cutter 410, which is located below the scrap C. Specifically, the cutter 410 includes an integrally formed drive section and a cutting section. The length of the drive section along the cutting motion direction is much greater than the length of the cutting section along the cutting motion direction; in addition, the thickness of the drive section is greater than the thickness of the cutting section. To ensure effective transmission of cutting power, the thickness of the drive section needs to be relatively large. To achieve precise cutting, the cutting section needs to be designed as a thin body. The thickness of the drive section and the cutting section gradually decreases to connect with the drive assembly. Specifically, the end of the drive section connected to the cutting section is designed with a concave arc-shaped section, which ensures a stable connection while effectively introducing the driving force to the cutting section; the cutting edge 411 is provided at the end of the cutting section furthest from the drive section. Figure 5 As shown, the blade 411 is inclined, that is, one end of the blade 411 is lower than the other end, and the blade 411 is a straight blade 411, thus forming an inclined blade 411 structure.

[0044] like Figure 4 and Figure 5 As shown, it should be noted that: both sides of the blade 411 are provided with side walls that are inclined toward the driving section of the cutter 411, and the two side walls have different inclination angles.

[0045] Additionally, such as Figure 2 As shown, it also includes a cutter drive seat 430, which is positioned above the ejector rod 440. Specifically, the ejector rod 440 abuts against the cutter drive seat 430, and the cutter 410 is locked to the cutter drive seat 430 by screws. When the ejector rod 440 abuts against the cutter drive seat 430, the cutter drive seat 430 drives the cutter 410 to perform a cutting motion. It should be noted that a spring 460 is installed at the end of the ejector rod 440 connected to the cutter drive seat 430. The two ends of the spring 460 abut against the cutter drive seat 430 and the ejector rod 440 respectively, to drive the cutter 410 to return to its original position.

[0046] like Figure 6 As shown, the guide sleeve 420 is fixedly installed inside the mold and positioned away from the drive assembly. The guide sleeve 420 has a through-cutting groove 421 and a pad groove 422 at one end away from the drive assembly. This pad groove 422 is an internal groove and forms part of the residual material C forming cavity. Specifically, the guide groove 421 is located on the side of the guide sleeve 420 and consists of a through-cutting section and an exit section. The width of the inlet section is greater than the width of the exit section. The sidewall and bottom of the exit section extend into the groove, forming a protruding structure that closely adheres to the cutting section of the cutter 410. This effectively guides the cutter 410 to the accurate cutting position, ensuring the accuracy of residual material C removal.

[0047] like Figure 2As shown, the cutter drive seat 430 is stacked with a limiting seat 441, which is a single piece with a limiting hole along the cutting movement direction. A limiting rod 442 is installed in the limiting hole. It should be noted that one end of the limiting rod 442 extends into the mold to fix the limiting rod 442, and the other end of the limiting rod 442 extends into the limiting hole. It should be noted that the limiting rod 442 is not connected to the limiting hole, and the other end of the limiting rod 442 is at a certain distance from the cutter drive seat 430. This distance should be sufficient for the cutting movement of the cutter 410. The limiting seat 441 should be at a certain distance from the corresponding surface of the mold, and this distance should not be less than the distance between the limiting rod 442 and the cutter drive seat 430. According to the above structural design, when the cutter 410 is driven by the cutter drive seat 430 to perform the cutting motion, the cutter 410 and the cutter drive seat 430 perform the cutting motion together until the cutter drive seat 430 abuts against the limit rod 442 to limit the cutting of the cutter 410.

[0048] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, based on the above structural design, the working principle of the in-mold cutting mechanism is as follows:

[0049] The air pipe supplies air to the cylinder. The driven section of the cylinder drives the ejector rod 440 to move. The driven ejector rod 440 drives the cutter 410 to perform a cutting motion through the cutter drive seat 430. The cutter 410 performs a cutting motion within the guide sleeve 420. While the cutter drive seat 430 is performing a cutting motion, the cutting motion of the cutter 410 is limited by the cooperation of the limit seat 441 and the limit rod 442, thereby ensuring that the cutting motion is performed within the membrane. In addition, the cutter 410 is reset by the spring 460 sandwiched between the ejector rod 440 and the cutter drive seat 430, in preparation for the next cutting motion.

[0050] An injection mold having the above-mentioned in-mold cutting mechanism is used to process materials such as... Figure 1 Product A, the injection mold includes a mold frame, a mold core, a core-pulling mechanism, and an in-mold cutting mechanism, all of which are installed inside the mold frame.

[0051] like Figure 7 and Figure 8 As shown, the mold core is provided with a molding cavity adapted to product A, and it includes a front mold core 310 and a rear mold core 320 that are interlocked with each other.

[0052] like Figure 7 and Figure 8As shown, the mold frame includes a front mold assembly and a rear mold assembly. The front mold assembly includes a top plate 110, a front mold pad 120, and a front template 130 arranged sequentially. The front template 130 has a front mold groove facing the rear mold assembly, and the front mold core 310 is fixed in the front mold groove. It should be noted that the top plate 110 is fixedly connected to the front mold pad 120, and the front mold pad 120 is in close contact with the front template 130. This structural design is to allow the front mold pad 120 and the front template 130 to be separated relative to each other during the mold opening process, i.e., to achieve secondary mold opening. The rear mold assembly includes a bottom plate 210, a square iron 220, and a rear template 230. The two square iron blocks 220 are fixed on the same base plate 210. The rear template 230 is fixed on 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. An ejection mechanism is installed in the ejection cavity. The rear template 230 has a rear mold groove facing the front mold assembly. The rear mold core 320 is fixed in the rear mold groove. The ejection mechanism includes an ejection plate assembly 241, an ejector pin 242 and an inclined ejector 243. The ejector pin 242 and the inclined ejector 243 are fixed on the ejection plate assembly 241 and are driven by the ejection plate assembly 241 to perform a reciprocating linear ejection motion in the ejection cavity.

[0053] like Figure 7 As shown, the in-mold cutting mechanism is installed in the rear module. The air pipe is embedded in the base plate 210. The pneumatic drive is fixed on the base and connected to the air pipe. The ejector rod 440 is placed on the pneumatic drive and extends through the ejector plate assembly 241 into the rear template 230. When the ejector rod 440 extends into the rear template 230, it needs to pass through the fixing plate 450 embedded in the rear template 230. The cutter drive seat 430 is placed on the fixing plate 450, and the limiting seat 441 is placed on the cutter drive seat 430. The cutter 410 passes through the rear template 230 and the rear mold core 320 in sequence and extends into the lower part of the molding cavity of product A. The guide cutting sleeve 420 is fixedly embedded in the rear mold core 320. The cutter 410 extends into the guide cutting groove 421 of the guide cutting sleeve 420 to remove the excess material C.

[0054] The ejector pin 242 passes through the rear mold plate 230 and the rear mold core 320, extends into the lower part of the molding cavity, and is positioned close to the guide sleeve 420. It should be noted that a C-shaped guide groove is provided on one side of the cutter drive seat 430, and the ejector pin 242 is placed in the C-shaped guide groove to guide the ejection operation of product A.

[0055] It should be noted that: such as Figure 7As shown, the front mold core 310 has a residual material C forming groove, which is provided in accordance with the pad groove 422 of the guide sleeve 420. The residual material C forming groove and the pad groove 422 are opposite to each other and connected, forming a slow flow cavity during the injection of glue at the gate B. This slow flow cavity is the forming cavity of the residual material C. Specifically, the slow flow cavity is a structure that can guide the glue during the injection process of the injection machine into the mold.

[0056] like Figure 8 As shown, the core-pulling mechanism includes a core-pulling drive block 510, a core-pulling slider 520, and a core 530. The core-pulling drive block 510 is mounted on the front mold plate 130 and is fixed to the front mold pad by screws. The core 530 is fixedly connected to the core-pulling slider 520. The core 530 passes through the front mold core 310 and extends into the molding cavity of product A. The driving end of the core-pulling drive block 510 extends into the driving hole of the core-pulling slider 520, thereby driving the core-pulling slider 520 to move away from the mold core for core-pulling displacement, adapting to the molding process of product A.

[0057] like Figure 8 As shown, the inclined ejector 243 is fixed on the ejector plate assembly 241 and driven by the ejector plate assembly 241 to perform the inclined ejector 243 operation, which adapts to the molding of product A and removes product A from the rear mold core 320.

[0058] like Figures 2 to 8 As shown, manufacturing as Figure 1 The product A shown uses an injection mold, and its demolding principle is as follows:

[0059] Step 1: Mold making:

[0060] The top plate 110 separates from the front mold pad 120 and the front template 130 to achieve one mold opening. The front mold pad 120, which performs the mold opening movement, drives the core pulling drive block 510 to move along the mold opening direction. The driven core pulling drive block 510 drives the core pulling slider 520 and the core 530 to perform core pulling operations simultaneously.

[0061] Subsequently, the front mold plate 130 also performs the mold opening movement. At this time, the front mold plate 130 drives the front mold core 310 to separate from the injection-molded product A.

[0062] Step 2; Remove excess material C;

[0063] The pneumatic drive unit drives the ejector rod 440, which in turn drives the cutter 410 to perform a cutting motion via the cutter drive seat 430, thereby removing the excess material C. The cutting distance of the cutter 410 is limited by the cooperation of the limit seat 441 and the limit rod 442, and the cutter 410 is driven to reset by the spring 460, thus completing the expected cutting motion.

[0064] Step 3: Eject and demold;

[0065] The ejector plate assembly 241 drives the ejector pins 242 and the angled ejector 243 to work synchronously, so that product A is ejected from the rear mold core 320, completing the demolding of product A.

[0066] 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 in-mold cutting mechanism, characterized in that: It includes a cutter, a guide sleeve, and a drive assembly, wherein: The cutter is connected to the drive assembly and is driven by the drive assembly to perform a cutting motion along the mold opening direction; The guide sleeve has a guide groove, and the cutter extends into the guide groove and performs a reciprocating linear cutting motion within the guide groove. The cutter has an inclined blade, and the guide sleeve has a groove at one end corresponding to the blade. This groove is part of the cavity for injecting and introducing adhesive.

2. The in-mold cutting mechanism according to claim 1, characterized in that: The cutter is fixed on the cutter drive seat, and the cutter drive seat is located at the drive end of the drive assembly.

3. The in-mold cutting mechanism according to claim 2, characterized in that: It also includes a limiting seat; The limiting seat is placed on the cutter drive seat and is located close to the guide sleeve; A limiting rod is inserted into the limiting seat, and there is a distance between the limiting rod and the cutter drive seat to meet the requirements of the material removal movement.

4. The in-mold cutting mechanism according to claim 1, characterized in that: The drive assembly includes a pneumatic drive body and an ejector rod. The pneumatic drive body drives the cutter to perform cutting motion through the ejector rod.

5. The in-mold cutting mechanism according to claim 4, characterized in that: The ejector rod is equipped with a spring.

6. An injection mold, comprising a mold frame and a mold core, wherein the mold core is provided with a molding cavity for the product and is installed within the mold frame, characterized in that: It also includes an in-mold cutting mechanism installed in the mold frame, wherein the in-mold cutting mechanism is the in-mold cutting mechanism as described in any one of claims 1 to 5.

7. The injection mold according to claim 6, characterized in that: The mold frame is also equipped with a core-pulling mechanism, which is installed in the front module of the mold frame.

8. The injection mold according to claim 6, characterized in that: The front core of the mold core has a material forming groove, which is matched with the pad groove to form a slow-flow cavity.

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