Cutter, in-mold hot cutting mechanism and injection mold

Abstract

The utility model relates to a cutter, an in-mold hot cutting mechanism and an injection mold, the cutter comprises a cutter face, a circulating groove and a communicating groove, and the cutter face is arranged at the top of the cutter; the runner groove is formed in the cutter face in a sunken mode and used for being communicated with a runner in the injection mold. The communicating groove is concavely formed in the cutter surface and is used for communicating a product injection molding cavity with the runner groove; a flow guide structure in angular connection with the cutter face is arranged on the side, away from the runner groove, of the communicating groove. The top of the cutter is provided with the runner groove and the communicating groove which are sunken in the cutter face, when the cutter face cuts off a sprue, redundant injection molding raw materials at the sprue enter the communicating groove and move towards the runner groove with the large volume under the action of a flow guide structure of the communicating groove, and therefore the sprue is cut off. Excessive raw materials are squeezed into the runner groove and the runner communicated with the runner groove, so that the extrusion resistance of the cutter at the sprue can be reduced, the sprue can be completely cut, a product can be completely separated from the runner, and the shearing effect of automatically cutting the sprue is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of injection molding technology, and in particular to a cutter, an in-mold hot cutting mechanism, and an injection mold. Background Art

[0002] As the scope of use of plastic products continues to expand, their production volume is also growing. In order to meet the growing demand for plastic parts production, a large number of companies use injection molds to achieve mass production of plastic parts.

[0003] After a plastic part is molded in the mold, the sprue and the product are connected by the gate. After the mold is opened, workers must manually remove the gate and gating system waste, consuming a significant amount of post-processing time. Furthermore, because the gate is sheared only after the mold is opened, the plastic part and runner have already cooled and formed. This results in an unsightly gate surface after shearing, resulting in a poor quality product. Repeated manual trimming and polishing are required to achieve a smooth gate, further increasing worker intensity and labor costs.

[0004] When a cutter is used in the prior art to automatically remove the gate, a large amount of excess injection molding material (such as plastic) exists at the gate, which will produce a large extrusion resistance to the cutter, and it is easy to cause problems such as the gate not being cut off or the cut part being unsightly, and the shearing effect of the automatic gate removal cannot be guaranteed. Utility Model Content

[0005] The present application provides a cutter, an in-mold hot cutting mechanism and an injection mold to solve the technical problem in the prior art that the cutter is subject to large extrusion resistance and cannot ensure the shearing effect of automatically cutting off the gate.

[0006] In a first aspect, the present application provides a cutter, comprising:

[0007] A cutting surface, which is provided on the top of the cutting knife;

[0008] A runner groove is recessed on the cutting surface and is used to communicate with the runner in the injection mold;

[0009] The connecting groove is recessed on the cutting surface and is used to connect the product injection molding cavity and the runner groove. A flow guide structure connected to the cutting surface at an angle is provided on the side of the connecting groove away from the runner groove.

[0010] Optionally, the guide structure includes a first inclined surface and a second inclined surface, the first inclined surface is connected to the cutting surface to form a sharp edge line, and the second inclined surface is set at an angle to the first inclined surface for squeezing the injection molding material into the runner groove.

[0011] Optionally, the front end of the cutter is provided with a curved surface structure.

[0012] Optionally, the curved surface structure is provided on a side edge of the front end of the cutter.

[0013] In a second aspect, the present application provides an in-mold hot cutting mechanism, comprising the cutter provided in the first aspect of the present application, and also comprising a driving member connected to the cutter to drive the cutter to move relative to the flow channel.

[0014] Optionally, the in-mold hot cutting mechanism further includes a transmission member, one end of the transmission member is detachably connected to the driving member, and the other end of the transmission member is detachably connected to the cutter.

[0015] In the third aspect, the present application provides an injection mold, including the in-mold hot cutting mechanism provided in the second aspect of the present application, and also including a female mold and a male mold, the cutter is movably arranged inside the male mold, and there is a first preset distance between the cutting surface and the female mold.

[0016] Optionally, a sliding cavity is provided on the male mold, and cutter limiters are provided on both sides of the sliding cavity, and the cutter is slidably connected to the cutter limiters.

[0017] Optionally, guide parts are provided on both sides of the cutter, and the guide parts are arranged in sliding contact with the cutter limiter.

[0018] Optionally, a wear-resistant part is provided inside the sliding cavity, and the cutter is arranged in sliding contact with the wear-resistant part.

[0019] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0020] The top of the cutter provided in the embodiment of the present application is provided with a runner groove and a connecting groove recessed in the cutter surface, and a guide structure is provided on the side of the connecting groove away from the runner groove. When the cutter faces the gate for cutting, the excess injection molding material at the gate enters the connecting groove and, under the action of the guide structure of the connecting groove, moves toward the runner groove with a larger volume, thereby squeezing the excess injection molding material into the runner groove and the runner connected to the runner groove, which can reduce the extrusion resistance encountered by the cutter at the gate, is conducive to the complete removal of the gate, the complete separation of the product and the runner, and the guarantee of the shearing effect of automatic gate removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 A schematic diagram of the structure of a cutter provided in an embodiment of the present application;

[0025] Figure 2 A cross-sectional view of a cutter provided in an embodiment of the present application;

[0026] Figure 3 Provided in the embodiments of this application Figure 2 A magnified view of the details of part A;

[0027] Figure 4 A schematic diagram of the working of the in-mold hot cutting mechanism provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the cooperation between the in-mold hot cutting mechanism, the cutter limiter, and the wear-resistant part provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the interior of the injection mold provided in an embodiment of the present application in a mold-closed state;

[0030] Figure 7 The embodiment of this application provides Figure 6 Partial cross-sectional view of the middle BB;

[0031] Figure 8 Provided in the embodiments of this application Figure 7 A magnified view of the details of part C in the middle;

[0032] Figure 9 This is a schematic diagram of the interior of the injection mold provided in an embodiment of the present application after in-mold hot cutting is completed.

[0033] Description of reference numerals:

[0034] 1. Cutter; 11. Cutter surface; 12. Flow channel; 13. Connecting groove; 131. First inclined surface; 132. Second inclined surface; 14. Curved surface structure; 15. Guide portion; 16. Connecting portion;

[0035] 2. Driving parts;

[0036] 3. Transmission parts;

[0037] 4. Master mold;

[0038] 5. Male mold; 51. Sliding cavity; 52. Cutter limiter; 53. Wear-resistant parts;

[0039] 6. Runner;

[0040] 7. Product. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0043] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0044] In order to solve the technical problem in the prior art that the cutter 1 is unable to ensure the shearing effect of automatically cutting off the gate due to the large extrusion resistance, the present application provides a cutter 1, an in-mold hot cutting mechanism and an injection mold. The top of the cutter 1 is provided with a runner groove 12 and a connecting groove 13 recessed in the cutter surface 11. The connecting groove 13 is provided with a guide structure on the side away from the runner groove 12, which can discharge the excess injection molding material (i.e. plastic fluid, etc.) at the gate into the runner groove 12, reducing the excess injection molding material at the gate, thereby reducing the extrusion resistance encountered by the cutter 1 when cutting off the gate, which is conducive to the cutter 1 to completely cut off the gate and ensure the shearing effect of automatically cutting off the gate.

[0045] See also Figures 1 to 9 In a first aspect of the embodiment of the present application, a cutter 1 is provided, comprising a cutter surface 11, a flow channel groove 12 and a connecting groove 13. The cutter surface 11 is arranged at the top of the cutter 1 and is arranged opposite to the lower surface of the mother mold 4 in the injection mold. Figure 7 and Figure 8 As shown, when the cutter 1 moves relative to the mother mold 4, the gate of the product 7 can be cut off through the cutter surface 11.

[0046] See also Figure 1 、 Figure 2 and Figure 3 The runner groove 12 is recessed in the cutting surface 11 and is used to communicate with the runner 6 in the injection mold, thereby realizing the transmission of the injection molding raw material; the connecting groove 13 is recessed in the cutting surface 11 and is used to connect the product injection molding cavity and the runner groove 12; the injection molding raw material in the runner groove 12 can enter the product injection molding cavity through the connecting groove 13, thereby realizing the filling of the product injection molding cavity, thereby forming a product 7 of a preset shape. A guide structure is provided on the side of the connecting groove 13 away from the runner groove 12, which is connected to the cutting surface 11 at an angle. When the cutting surface 11 cuts off the gate, the excess injection molding material at the gate enters the connecting groove 13 and, under the action of the guide structure of the connecting groove 13, moves toward the runner groove 12 with a larger volume, thereby expelling the excess injection molding material into the runner groove 12 and the runner 6 connected to the runner groove 12. This can reduce the extrusion resistance encountered by the cutter 1 at the gate, which is conducive to the complete removal of the gate and the complete separation of the product 7 from the runner 6.

[0047] It should be noted that, since the cutter 1 cuts off the gate when the injection molding material has not yet solidified (i.e., hot cutting in the mold), the product 7 and the gate can be automatically separated, the gate mark can be removed beautifully, and secondary manual trimming can be reduced, which is beneficial to reducing the labor intensity of workers and the labor cost of the enterprise.

[0048] In some embodiments of this application, please refer to Figure 3The guide structure includes a first bevel 131 and a second bevel 132. The first bevel 131 connects with the cutting surface 11 to form a sharp edge line, which facilitates efficient gate removal. The second bevel 132 is set at an angle to the first bevel 131 and is used to push the injection molding material into the runner groove 12.

[0049] In some embodiments of this application, please refer to Figure 3 The angle between the first bevel 131 and the cutting surface 11 is α. In order to connect the cutting surface 11 and the first bevel 131 to form a sharp edge line, α is preferably an acute angle, which can be used to improve the sharpness of the sharp edge line so as to achieve efficient shearing of the injection molding material at the gate.

[0050] In some preferred embodiments of the present application, the value range of α is 30°-60°. This is because when the value of α is less than 30°, the sharp edge (equivalent to the cutting edge) formed by the connection between the cutting surface 11 and the first bevel 131 has low structural strength and is easily damaged; and when the value of α is greater than 60°, the sharp edge will be too blunt and the cutting effect will be poor.

[0051] In some embodiments of this application, please refer to Figure 3 The included angle between the second inclined surface 132 and the vertical direction is β. In order to discharge the injection molding material into the flow channel 6 through the second inclined surface 132, the value range of β is less than 90°.

[0052] In some preferred embodiments of the present application, the value of β is 30°, and the injection molding material flows along the second inclined surface 132 into the runner groove 12, which can significantly reduce the extrusion resistance of the sharp edge at the gate.

[0053] In some embodiments of this application, please refer to Figure 1 and Figure 9 The front end of the cutter 1 is provided with a curved surface structure 14, which can reduce the wear on the front end of the cutter 1 and increase the service life of the cutter 1.

[0054] It should be noted that, since the cutter 1 performs gate removal by sliding in the injection mold, a curved surface structure 14 may be provided on the outer surface of the cutter 1 where it contacts the female mold 4 and the male mold 5 to reduce wear of the cutter 1 .

[0055] In some embodiments of this application, please refer to Figure 1 The curved surface structure 14 is provided on the side edges of the front end of the cutter 1. This is because when the cutter 1 moves relative to the male mold 5, the side edges on both sides of the front end of the cutter 1 are easily worn during use, and burrs are easily generated, which reduces the service life of the cutter 1. In this application, the curved surface structure 14 is provided on the side edges on both sides of the front end of the cutter 1. By replacing the straight side edges with the curved surface structure 14, burrs can be avoided at the front end of the cutter 1 due to wear.

[0056] It should be noted that the curved surface structure 14 can be an arc surface, a semicircular end surface, or a rectangular end surface with rounded corners, all of which can achieve the purpose of this application and are not limited here.

[0057] See also Figures 1 to 9 The second aspect of the embodiment of the present application provides an in-mold hot cutting mechanism, comprising the cutter 1 in the above embodiment, and also comprising a driving member 2, the driving member 2 being connected to the cutter 1 to drive the cutter 1 to move relative to the runner 6, thereby achieving gate removal and separating the product 7 from the runner 6, as shown in FIG. Figure 4 、 Figure 5 、 Figure 6 and Figure 9 shown.

[0058] It should be noted that the driving member 2 can be a linear actuator such as a hydraulic cylinder, a pneumatic cylinder, etc., which can be selected according to the driving force required by the cutter 1 and can achieve the purpose of this application.

[0059] In some preferred embodiments of the present application, the driver 2 is a miniature ultra-high-pressure cylinder, which features a simple and compact structure while being lightweight, making it easy to install and use within limited spaces (such as within an injection mold). This improves the overall performance and flexibility of the in-mold hot-cut mechanism. The miniature ultra-high-pressure cylinder can withstand extremely high hydraulic pressures and maintain stable performance even in high-temperature environments. It is less susceptible to excessive deformation or failure due to temperature fluctuations, thereby improving the durability and safety of the in-mold hot-cut mechanism.

[0060] In some embodiments of this application, please refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 The in-mold hot cutting mechanism also includes a transmission member 3, one end of which is detachably connected to the driving member 2, and the other end of the transmission member 3 is detachably connected to the cutter 1, which can facilitate the assembly of the in-mold hot cutting mechanism inside the injection mold.

[0061] Specifically, the transmission member 3 is inserted in the male mold 5, and the transmission member 3 can move relative to the male mold 5. The driving member 2 is installed on the outside of the male mold 5, and the cutter 1 is installed on the inside of the male mold 5. The transmission between the driving member 2 and the cutter 1 can be realized through the transmission member 3. Under the action of the driving member 2, the transmission member 3 and the cutter 1 are moved as a whole relative to the male mold 5 and the female mold 4, thereby realizing the cutting of the gate or the resetting of the cutter 1.

[0062] In some embodiments of this application, please refer to Figure 5 and Figure 6 The rear end of the cutter 1 is provided with a connecting portion 16 for realizing a detachable connection with the end of the transmission member 3.

[0063] In some preferred embodiments of the present application, in order to improve the assembly efficiency between the cutter 1 and the transmission member 3, the connecting portion 16 is a T-slot arranged at the rear end of the cutter 1, and the end of the transmission member 3 close to the cutter 1 is a T-shaped structure. When the transmission member 3 extends from the male mold 5, it is only necessary to connect the T-slot of the cutter 1 and the T-shaped structure at the end of the transmission member 3 to complete the assembly of the cutter 1 and the transmission member 3.

[0064] See also Figures 1 to 9 In a third aspect, the present invention provides an injection mold, comprising the in-mold hot cutting mechanism of the above-mentioned embodiment, and further comprising a female mold 4 and a male mold 5, wherein the product injection cavity and the runner 6 are formed between the female mold 4 and the male mold 5. The cutter 1 is movably arranged inside the male mold 5 and can slide relative to the male mold 5 to cut off the gate. There is a first preset distance L1 between the cutter surface 11 and the female mold 4, such as Figure 7 and Figure 8 As shown, the flow channel 6 and the product 7 are completely separated and the cutter 1 is prevented from hitting the surface of the mother mold 4 during the cutting process.

[0065] In some preferred embodiments of the present application, the value of the first preset distance L1 is 0.05 mm.

[0066] In some embodiments of this application, please refer to Figure 6 There is a second preset distance L2 between the product 7 and the flow channel 6, which can form a break with the plane of the cutter 1, ensuring that the product 7 and the flow channel 6 are automatically separated without generating burrs, and also ensuring that the mother mold 4 side has sufficient strength.

[0067] In some preferred embodiments of the present application, the second preset distance L2 is set to 0.50 mm.

[0068] In some embodiments of this application, please refer to Figure 6 、 Figure 7 and Figure 9 The male mold 5 is provided with a sliding cavity 51, and the cutter 1 is located inside the sliding cavity 51. There are cutter stoppers 52 on both sides of the sliding cavity 51, and the cutter 1 is slidably connected to the cutter stoppers 52 so that the cutter 1 can only move along the Figure 7 Slide left and right to ensure the accuracy of gate removal.

[0069] In some embodiments of this application, please refer to Figure 1 and Figure 5 Guides 15 are provided on both sides of the cutter 1. These guides 15 are arranged in sliding contact with the cutter stopper 52 to provide sliding guidance for the cutter 1. Specifically, the guides 15 are horizontally extending boss structures, and the cutter stopper 52 is a cutter 1 pressure strip. The lower surface of the pressure strip is arranged in sliding contact with the upper surface of the boss structure to prevent the cutter 1 from tilting upward during sliding.

[0070] In some embodiments of this application, please refer to Figure 5 and Figure 7 A wear-resistant member 53 is provided within the sliding cavity 51. The cutter 1 is in sliding contact with the wear-resistant member 53, reducing wear on the cutter 1 caused by repeated sliding during production, thereby improving the wear resistance and service life of the cutter 1. Furthermore, the size of the wear-resistant member 53 can be adjusted to adjust the assembly position of the cutter 1 within the sliding cavity 51, thereby ensuring proper fit between the cutter 1 and the four surfaces of the master mold.

[0071] In some embodiments of the present application, a wear-resistant member 53 is disposed at the bottom of the cutter 1. The first predetermined distance L1 between the cutter surface 11 and the surface of the mother mold 4 can be adjusted by adjusting the thickness of the wear-resistant member 53. The wear-resistant member 53 is provided with a countersunk hole for mounting a screw. When the wear-resistant member 53 is fixed to the bottom of the sliding cavity 51 by the screw, the screw head can be prevented from protruding from the upper surface of the wear-resistant member 53, thereby preventing the cutter 1 from sliding.

[0072] In some embodiments of the present application, the wear-resistant part 53 is made of a material with strong wear resistance and low friction coefficient, such as polytetrafluoroethylene, ceramic material, polymer composite material, etc., which can reduce the wear and sliding resistance of the wear-resistant part 53 on the cutter 1, which is beneficial to improving the service life of the cutter 1 and the in-mold hot cutting mechanism.

[0073] See also Figures 1 to 9 In some embodiments of the present application, the in-mold hot cutting process of the above-mentioned injection mold is as follows:

[0074] Step 1: Close the injection mold and position the cutter 1 in the injection mold as shown below: Figure 6 As shown, at this time, the runner groove 12 in the cutter 1 is connected to the runner 6 inside the mold, and the connecting groove 13 is connected to the product injection cavity;

[0075] Step 2: Injecting the injection molding material (such as plastic, etc.) into the injection mold, the injection molding material flows through the runner 6 into the runner groove 12 of the cutter 1, and then flows through the runner groove 12 into the connecting groove 13 and the product injection molding cavity until the injection molding material completely fills the product injection molding cavity;

[0076] Step 3: The driving member 2 drives the transmission member 3 and the cutter 1 to move, and the cutter 1 moves along the guide limit of the cutter limit member 52. Figure 7 Slide from left to right until cutter 1 moves to Figure 9 In the position shown, the sharp edge formed by the cutting surface 11 and the first bevel 131 cuts off the gate, and the excess injection molding material is squeezed into the runner groove 12 by the second bevel 132. The runner groove 12 and the runner 6 are misaligned, thereby realizing the gate removal and the separation of the product 7 and the runner 6.

[0077] Step 4: After the product 7 is cooled and solidified, the injection mold is opened and the product 7 is taken out from the product injection cavity.

[0078] This application uses the above-mentioned in-mold hot cutting mechanism and in-mold hot cutting method to automatically separate product 7 and the gate. This not only simplifies the post-processing procedures of plastic parts and makes the plastic parts beautiful in appearance, but also reduces the number of workshop employees by 1 / 3. Calculated based on a 5s reduction in working hours for the production time of each product 7, a set of molds can produce 3,000 molds a day, which is equivalent to a reduction of 4.16 hours of working hours, realizing the automated production of product 7, improving the production efficiency of product 7, and taking the goal of unmanned factories one step closer, reducing labor costs, improving the competitiveness of product 7, and improving the economic benefits of the enterprise.

[0079] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0080] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0081] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A cutter (1), characterized in that: include: A cutting surface (11), the cutting surface (11) being arranged on the top of the cutting knife (1); A flow channel groove (12), the flow channel groove (12) is recessed in the cutting surface (11) and is used to communicate with the flow channel (6) in the injection mold; A connecting groove (13) is provided, the connecting groove (13) being recessed in the cutting surface (11), and the connecting groove (13) being used to connect the product injection molding cavity and the runner groove (12); a flow guide structure connected to the cutting surface (11) at an angle is provided on a side of the connecting groove (13) away from the runner groove (12).

2. The cutter (1) according to claim 1, characterized in that The flow-guiding structure comprises a first inclined surface (131) and a second inclined surface (132), wherein the first inclined surface (131) is connected to the cutting surface (11) to form a sharp edge line, and the second inclined surface (132) is arranged at an angle to the first inclined surface (131) and is used to extrude the injection molding material toward the flow channel (12).

3. The cutter (1) according to claim 1 or 2, characterized in that The front end of the cutter (1) is provided with a curved surface structure (14).

4. The cutter (1) according to claim 3, characterized in that The curved surface structure (14) is arranged on the side edge of the front end of the cutter (1).

5. An in-mold hot cutting mechanism, characterized in that: It comprises the cutter (1) according to any one of claims 1 to 4, and further comprises a driving member (2), wherein the driving member (2) is connected to the cutter (1) and is used to drive the cutter (1) to move relative to the flow channel (6).

6. The in-mold hot cutting mechanism according to claim 5, characterized in that: It also includes a transmission member (3), one end of which is detachably connected to the driving member (2), and the other end of which is detachably connected to the cutter (1).

7. An injection mold, characterized in that: The invention comprises an in-mold hot cutting mechanism as described in claim 5 or 6, and further comprises a female mold (4) and a male mold (5), wherein the cutter (1) is movably arranged inside the male mold (5), and a first preset distance is provided between the cutter surface (11) and the female mold (4).

8. The injection mold according to claim 7, characterized in that: The male mold (5) is provided with a sliding cavity (51), and cutter stoppers (52) are provided on both sides of the sliding cavity (51). The cutter (1) is slidably connected to the cutter stoppers (52).

9. The injection mold according to claim 8, characterized in that Guide portions (15) are provided on both sides of the cutter (1), and the guide portions (15) are arranged in sliding contact with the cutter stopper (52).

10. The injection mold according to claim 8, characterized in that A wear-resistant part (53) is provided inside the sliding cavity (51), and the cutter (1) is arranged in sliding contact with the wear-resistant part (53).

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