In-mold water porting mold structure

Abstract

The utility model relates to mould technical field discloses a kind of in-mould cutting nozzle mould structure, including back mould, the die core being arranged in the inside of back mould, and it is equipped with the in-mould cutter being set through back mould, die core;And it is equipped with the ejector pin module of driving in-mould cutter twice cutting nozzle;And it is equipped with the auxiliary ejector pin that nozzle is supported and thereby auxiliary cutting;By setting die core in the inside of back mould and setting in-mould cutter therebetween, the direct cutting of product nozzle is realized. Ejector pin module is responsible for driving in-mould cutter twice cutting, so that nozzle can be segmented stress, gradually cut, avoid the nozzle pull wool or product break caused by one-time cutting. At the same time, auxiliary ejector pin supports and is tightly closed to nozzle during cutting process, so that nozzle position is stable, cutting stress is more uniform, to improve cut quality, reduce subsequent edging process, overall improve production efficiency and finished product appearance quality.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and specifically to a mold structure for in-mold gate cutting. Background Technology

[0002] A mold is a specialized piece of equipment used to shape materials. By applying pressure, temperature, or other conditions within a cavity of a specific shape, it molds the raw material into the desired shape and size of a part. Molds are widely used in injection molding, stamping, die casting, forging, extrusion, and other processing fields. The following problems exist in the current market: After the current products are formed, there are inevitably sprue marks, which require an additional sprue-cutting process, resulting in low production efficiency. The technical problem to be solved by this utility model is to provide a mold structure that can cut the sprue inside the mold. Utility Model Content

[0003] The technical problem this invention addresses is: providing a mold structure capable of cutting sprues within the mold; by setting a mold core inside the rear mold and inserting an in-mold cutter therebetween, direct removal of sprues from the product is achieved. The ejector pin assembly drives the in-mold cutter to perform two cuts, allowing the sprue to be subjected to segmented force and gradually sheared, avoiding sprue roughening or product breakage caused by a single cut. Simultaneously, the auxiliary ejector pins support and clamp the sprue during the cutting process, stabilizing the sprue position and ensuring more even cutting force, thereby improving cut quality, reducing subsequent trimming processes, and improving overall production efficiency and finished product appearance quality. After product molding, the in-mold cutter cuts off the sprue, reducing subsequent sprue processing stations, saving costs, and effectively improving yield and efficiency.

[0004] An in-mold gate cutting mold structure includes a rear mold, a mold core disposed inside the rear mold, and an in-mold cutter disposed through the rear mold and the mold core; an ejector module for driving the in-mold cutter to cut the gate twice; and an auxiliary ejector for holding the gate against to assist in cutting.

[0005] Preferably, the bottom of the rear mold is provided with two guard plates spaced apart; and a bottom plate is provided below the rear mold; the bottom plate is fixedly connected to the two guard plates; and the ejector pin assembly is disposed between the rear mold and the bottom plate.

[0006] Preferably, the ejector plate module includes an ejector plate; and a plurality of guide pillars are fixedly provided at the bottom of the rear mold; and the ejector plate and the guide pillars are slidably fitted together; and a buffer spring is sleeved on the guide pillars.

[0007] Preferably, the bottom of the in-mold cutter is fixedly connected to the ejector plate; and the bottom of the auxiliary ejector pin is also fixedly connected to the ejector plate.

[0008] Preferably, the ejector plate is also provided with several ejector pins for ejecting and demolding the product parts.

[0009] Preferably, the ejector plate is provided with several straight rods; and each straight rod is provided with an ejector angled rod to assist in ejecting the product part.

[0010] Preferably, both ends of the top of the ejector plate are detachably equipped with limiting blocks to limit the cutting distance of the in-mold cutter.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: The in-mold gate cutting mold structure of this utility model achieves direct removal of the sprue from the product by setting a mold core inside the rear mold and inserting an in-mold cutter within it. The ejector pin assembly drives the in-mold cutter to perform two cuts, allowing the sprue to be subjected to force in segments and gradually cut off, avoiding sprue roughening or product breakage caused by a single cut. Simultaneously, the auxiliary ejector pins support and clamp the sprue during the cutting process, stabilizing the sprue position and ensuring more uniform cutting force, thereby improving the cut quality, reducing subsequent trimming processes, and ultimately improving overall production efficiency and the appearance quality of the finished product.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the rear mold of this utility model.

[0015] Figure 2 This is a utility model Figure 1 A schematic diagram of the internal structure.

[0016] Figure 3 This is a schematic diagram of the limiting block structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the in-mold cutting blade position structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the auxiliary ejector pin structure of this utility model.

[0019] In the diagram: 1. Rear mold; 2. Mold core; 3. In-mold cutter; 5. Auxiliary ejector pin; 6. Protective plate; 7. Base plate; 8. Ejector plate; 9. Guide pillar; 10. Buffer spring; 11. Ejector pin; 12. Straight rod; 13. Ejector angle rod; 14. Limiting block; 15. Product part. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that the terms "first," "second," etc., used in this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with this disclosure.

[0022] Please see Figures 1-5 In this embodiment of the utility model, an in-mold gate cutting mold structure includes a rear mold 1 and a mold core 2 disposed inside the rear mold 1; and an in-mold cutter 3 disposed through the rear mold 1 and the mold core 2; and an ejector module for driving the in-mold cutter 3 to cut the gate twice; and an auxiliary ejector 5 for pressing the gate to assist in cutting.

[0023] Specifically, by setting a mold core 2 inside the rear mold 1 and inserting an in-mold cutter 3 therebetween, the sprue of the product can be directly removed. The ejector module is responsible for driving the in-mold cutter 3 to make two cuts, so that the sprue can be subjected to force in segments and gradually cut off, avoiding sprue burrs or product breakage caused by cutting off in one go; for example, the sprue can be cut off in the first cut and then cut and trimmed flat in the second cut; at the same time, the auxiliary ejector pin 5 supports and clamps the sprue during the cutting process, so that the sprue position is stable and the cutting force is more uniform, thereby improving the cut quality, reducing the subsequent trimming process, and improving the overall production efficiency and finished product appearance quality; the ejector module also needs to be driven by an external drive mechanism according to existing technology, which will not be elaborated here.

[0024] Furthermore, the bottom of the rear mold 1 is provided with two guard plates 6 spaced apart; and the bottom plate 7 is provided below the rear mold 1; and the bottom plate 7 is fixedly connected to the two guard plates 6; and the ejector pin module is disposed between the rear mold 1 and the bottom plate 7.

[0025] Specifically, two protective plates 6 are installed at the bottom of the rear mold 1, and are fixedly connected to the protective plates 6 via a base plate 7, forming a stable support frame, thereby enhancing the overall structural strength and durability of the rear mold 1. The ejector pin assembly is arranged between the rear mold 1 and the base plate 7, which not only facilitates installation and maintenance, but also helps to ensure the stability of the ejector pin movement and the even transmission of force. Through the coordinated support of the protective plates 6 and the base plate 7, vibration or displacement caused by the ejector pin assembly during operation can be effectively avoided, improving the accuracy and reliability of the cutting action of the in-mold cutter 3, thereby ensuring a more stable sprue cutting effect and more consistent product quality.

[0026] Furthermore, the ejector module includes an ejector plate 8; and several guide pillars 9 are fixedly provided at the bottom of the rear mold 1; the ejector plate 8 and the guide pillars 9 are slidably engaged; and a buffer spring 10 is sleeved on the guide pillars 9.

[0027] Specifically, by setting several guide pillars 9 at the bottom of the rear mold 1 and making the ejector plate 8 slide with the guide pillars 9, the guiding accuracy of the ejector plate 8 during its up-and-down movement is ensured, avoiding uneven force on the cutter or sprue cutting errors caused by misalignment. The buffer spring 10, which is sleeved on the guide pillars 9, provides elastic return and buffering effect during the reset and movement of the ejector plate 8, which can reduce the impact force at the moment of cutting, protect the in-mold cutter 3 and related parts, and extend their service life. At the same time, this structure makes the ejector movement more stable and the cutting process smoother, which is conducive to improving the sprue cutting quality and production stability.

[0028] Furthermore, the bottom of the in-mold cutter 3 is fixedly connected to the ejector plate 8; and the bottom of the auxiliary ejector 5 is also fixedly connected to the ejector plate 8.

[0029] Specifically, by fixing the bottom of the in-mold cutter 3 to the ejector plate 8, and simultaneously fixing the bottom of the auxiliary ejector pin 5 to the ejector plate 8, the two can achieve synchronous movement under the drive of the ejector plate 8. When the ejector plate 8 rises, the in-mold cutter 3 cuts the sprue, while the auxiliary ejector pin 5 simultaneously positions and clamps the sprue, ensuring that the sprue does not shift or lift during the cutting process, thus resulting in more uniform cutting force and a cleaner cut. This synchronization mechanism simplifies the transmission structure, improves the coordination and stability of the movements, ensures consistent sprue cutting quality, and is beneficial for improving product appearance and production efficiency.

[0030] Furthermore, the ejector plate 8 is also provided with several ejector pins 11 for ejecting and demolding the product parts.

[0031] Specifically, several ejector pins 11 are added to the ejector plate 8 to eject the product parts from the mold cavity. This allows the ejector plate 8 to continue the demolding operation after the in-mold cutter 3 completes the sprue cutting, thus integrating the sprue cutting and ejection actions. This not only reduces the need for additional demolding mechanisms and simplifies the mold structure, but also ensures that the product can be smoothly and steadily ejected after the cutting is completed, avoiding sticking or deformation, and improving production efficiency and product yield.

[0032] Furthermore, the ejector plate 8 is provided with several straight rods 12; and each straight rod 12 is provided with an ejector inclined rod 13 to assist in ejecting the product part.

[0033] Specifically, straight rods 12 are installed on the ejector plate 8, and ejection angled rods 13 are installed on each straight rod 12. When the ejector plate 8 is driven upward, the straight rods 12 drive the angled rods to generate an oblique thrust, thereby assisting in the ejection of the product part. This not only provides additional lateral or oblique release force on top of conventional ejector ejection, effectively preventing the product from being difficult to demold due to overmolding, undercuts, or sidewall friction, but also allows the product to leave the mold cavity more evenly and smoothly, reducing product deformation or tearing, and further improving demolding reliability and product appearance quality.

[0034] Furthermore, both ends of the top of the ejector plate 8 are detachably equipped with limiting blocks 14, thereby limiting the cutting distance of the in-mold cutter 3.

[0035] Specifically, by setting detachable limiting blocks 14 at both ends of the top of the ejector plate 8, the ejector plate 8 is physically limited during its upward movement, thereby precisely controlling the cutting stroke of the in-mold cutter 3. This prevents the cutter from cutting too deeply, causing damage to the product, or cutting too shallowly, resulting in incomplete removal of the sprue. The detachable design of the limiting blocks 14 allows for flexible adjustment of the cutting distance according to different products or sprue sizes, providing high adaptability and ease of adjustment. It also improves the stability and consistency of the cutting process, ensuring more reliable final product quality.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A mold structure for in-mold sprue cutting, comprising a rear mold (1) and a mold core (2) disposed inside the rear mold (1), characterized in that, It is provided with an in-mold cutter (3) that passes through the rear mold (1) and the mold core (2); and an ejector module that drives the in-mold cutter (3) to cut the gate twice; and an auxiliary ejector (5) that holds the gate in place to assist in cutting.

2. The in-mold gate cutting mold structure according to claim 1, characterized in that, The bottom of the rear mold (1) is provided with two guard plates (6) spaced apart; and the bottom plate (7) is provided below the rear mold (1); and the bottom plate (7) is fixedly connected to the two guard plates (6); and the ejector pin assembly is provided between the rear mold (1) and the bottom plate (7).

3. The in-mold gate cutting mold structure according to claim 2, characterized in that, The ejector module includes an ejector plate (8); and several guide pillars (9) are fixedly provided at the bottom of the rear mold (1); and the ejector plate (8) and the guide pillars (9) are slidably engaged; and a buffer spring (10) is sleeved on the guide pillars (9).

4. The in-mold gate cutting mold structure according to claim 3, characterized in that, The bottom of the in-mold cutter (3) is fixedly connected to the ejector plate (8); and the bottom of the auxiliary ejector (5) is also fixedly connected to the ejector plate (8).

5. The in-mold gate cutting mold structure according to claim 3, characterized in that, The ejector plate (8) is also provided with several ejector pins (11) for ejecting and demolding the product parts.

6. The in-mold gate cutting mold structure according to claim 3, characterized in that, The ejector plate (8) is provided with several straight rods (12); and each straight rod (12) is provided with an ejection diagonal rod (13) to assist in ejecting the product parts.

7. The in-mold gate cutting mold structure according to claim 3, characterized in that, Both ends of the top of the ejector plate (8) are detachably equipped with limiting blocks (14) to limit the cutting distance of the in-mold cutter (3).

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