Core pulling mechanism and injection mold

Abstract

The utility model relates to a core-pulling mechanism and an injection mold, the core-pulling mechanism comprises an inclined ejection insert, a straight ejection rod and an inclined guide rod, the inclined ejection insert is provided with a first guide part and a second guide part, and the first guide part extends in the horizontal direction; the extending direction of the second guide part is inclined relative to the horizontal direction; the length direction of the straight ejector rod is parallel to the vertical direction, the straight ejector rod is movably arranged in the vertical direction, and the top of the straight ejector rod is slidably connected with the first guide part in the horizontal direction; and the second guide part is slidably connected with the inclined guide rod. According to the core-pulling mechanism provided by the invention, the inclined ejection insert is ejected and demolded through the straight ejection rod with a small crossing distance, so that the size of a mold can be reduced; when the straight ejector rod upwards ejects and pushes the inclined ejector insert, the inclined ejector insert moves in the inclined upward direction under the guiding effect of the inclined guide rod to achieve demolding, due to the fact that the straight ejector rod and the first guide part are in sliding connection in the horizontal direction, the straight ejector rod can be prevented from interfering with movement of the inclined ejector insert, and the reliability of normal operation of a mold can be guaranteed.

Description

Technical Field

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

[0002] In mold design, the application of inclined ejector core-pulling mechanisms is to address the undercut problem of injection molded products, allowing for smooth demolding of products with undercut structures. In existing injection mold designs, inclined ejector pins are often used to push the inclined ejector insert in the mold, allowing it to move in the inclined direction for demolding.

[0003] When the inclined ejector rod is long, its horizontal span is large, which causes the ejector rod to occupy a large space and thus causes the overall size of the mold to be larger; and when the ejector rod moves along the inclined direction, it is easy to interfere with the ejector pin or other components in the mold, which will affect the normal operation of the mold. Utility Model Content

[0004] The present application provides a core pulling mechanism and an injection mold to solve the problem in the prior art that when an inclined ejector rod is used to drive an inclined ejector insert to move in an inclined direction, the mold size is large and the operating reliability is poor due to the large span distance of the inclined ejector rod.

[0005] In a first aspect, the present application provides a core pulling mechanism, comprising:

[0006] The inclined top insert is provided with a first guide portion and a second guide portion, wherein the first guide portion extends in a horizontal direction; and the extension direction of the second guide portion is inclined relative to the horizontal direction;

[0007] A straight push rod, wherein the length direction of the straight push rod is parallel to the vertical direction, the straight push rod is movably arranged in the vertical direction, and the top of the straight push rod is slidably connected to the first guide portion along the horizontal direction;

[0008] The oblique guide rod is slidingly connected to the second guide portion.

[0009] Optionally, there are two second guide portions, and the two second guide portions are symmetrically arranged on both sides of the first guide portion.

[0010] Optionally, the first guide portion is a T-shaped slide groove provided at the bottom of the inclined top insert, and the second guide portion is an inclined hole provided through the inclined top insert.

[0011] Optionally, the core-pulling mechanism further includes a ejector plate assembly movably arranged in the vertical direction, and the bottom of the straight ejector rod is connected to the ejector plate assembly.

[0012] Optionally, the connection between the bottom of the straight ejector rod and the ejector plate assembly is a detachable connection.

[0013] Optionally, the ejector plate assembly includes an ejector panel, an ejector base plate and a fixing screw. The ejector panel is provided with a through hole, and the bottom end of the straight ejector rod is inserted into the through hole; the ejector base plate is provided with a countersunk hole matching the fixing screw, and the fixing screw passes through the countersunk hole and is connected to the bottom end of the straight ejector rod.

[0014] Optionally, the core pulling mechanism further includes a driving assembly, which is connected to the ejector plate assembly to drive the ejector plate assembly and the straight ejector rod to move in the vertical direction.

[0015] Optionally, the driving assembly includes a KO insert, which is connected to the ejector plate assembly and the injection molding machine respectively.

[0016] Optionally, the core-pulling mechanism further includes a first fixing member, and the oblique guide rod is connected to the first fixing member.

[0017] In a second aspect, the present application provides an injection mold, comprising the core pulling mechanism provided in the first aspect of the present application.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0019] The core-pulling mechanism provided in the embodiment of the present application is provided with a first guide portion and a second guide portion on the inclined top insert, the first guide portion extends in the horizontal direction; the extension direction of the second guide portion is inclined relative to the horizontal direction, so that the second guide portion extends in the inclined direction. The length direction of the straight ejector is parallel to the vertical direction, so that the straight ejector extends in the vertical direction. Compared with the traditional inclined ejector, the cross-distance is smaller, which can avoid the increase in the size of the mold due to the provision of the ejector. When the straight ejector pushes the inclined top insert upward, the inclined top insert can be moved in the inclined upward direction under the guidance of the inclined guide rod to achieve demoulding. Since the straight ejector and the first guide portion are connected in a sliding manner in the horizontal direction, the straight ejector can avoid interference with the movement of the inclined top insert, thereby ensuring the normal operation of the mold and improving the operational reliability of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Figure 1 A schematic diagram of the partial structure of the core pulling mechanism provided in an embodiment of the present application;

[0024] Figure 2 Schematic diagram of the structure of the inclined top insert provided in the embodiment of the present application Figure 1 ;

[0025] Figure 3 Schematic diagram of the structure of the inclined top insert provided in the embodiment of the present application Figure 2 ;

[0026] Figure 4 Provided in the embodiments of this application Figure 1 A magnified view of the details of part A;

[0027] Figure 5 Provided in the embodiments of this application Figure 1 Rear view;

[0028] Figure 6 Provided in the embodiments of this application Figure 5 A magnified view of the details of part B;

[0029] Figure 7 A top view of the core pulling mechanism provided in an embodiment of the present application;

[0030] Figure 8 The embodiment of this application provides Figure 7 Cross-sectional view of CC;

[0031] Figure 9 The embodiment of this application provides Figure 7 Cross-sectional view of DD.

[0032] Description of reference numerals:

[0033] 1. Sloped top insert; 11. First guide portion; 12. Second guide portion; 13. Protruding portion;

[0034] 2. Straight push rod; 21. Sliding part; 22. Rod body; 23. Limiting part;

[0035] 3. Oblique guide rod; 31. Guide rod body; 32. Screw;

[0036] 4. Ejector plate assembly; 41. Ejector panel; 42. Ejector base plate; 43. Fixing screws;

[0037] 5. KO inserts;

[0038] 6. First fixing member; 61. Sliding cavity; 62. First through hole; 63. Screw hole;

[0039] 7. Second fixing member; 71. Second through hole; 72. Third through hole. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] To address the problem in the prior art of using an inclined ejector pin to drive an inclined ejector insert 1 in an inclined direction, which results in a larger mold size and poor operational reliability due to the large transverse span of the inclined ejector pin, the present application provides a core-pulling mechanism and an injection mold. By providing a first guide portion 11 and a second guide portion 12 on the inclined ejector insert 1 of the core-pulling mechanism, the first guide portion 11 allows for a horizontal sliding connection with the straight ejector pin 2, and the second guide portion 12 allows for a sliding connection with the inclined guide rod 3. When the straight ejector pin 2 pushes in a vertical direction, the inclined ejector insert 1 can move in an inclined direction under the guidance of the inclined guide rod 3. The transverse span of the straight ejector pin 2 is small, which can reduce mold size. The first guide portion 11 is horizontally slidably connected to the straight ejector pin 2, allowing the inclined ejector insert 1 to shift horizontally relative to the straight ejector pin 2 when the straight ejector pin 2 moves upward, preventing interference with the movement of the inclined ejector insert 1, ensuring proper mold operation, and improving mold reliability.

[0044] See also Figures 1 to 9 In a first aspect, the embodiment of the present application provides a core pulling mechanism, comprising an inclined top insert 1, a straight top rod 2 and an inclined guide rod 3, as shown in FIG. Figure 1 and Figure 3 The inclined top insert 1 is provided with a first guide portion 11 and a second guide portion 12. The first guide portion 11 extends in the horizontal direction. The second guide portion 12 extends in an inclined direction relative to the horizontal direction.

[0045] The length direction of the straight ejector rod 2 is parallel to the vertical direction, so that the straight ejector rod 2 extends in the vertical direction. Compared with the traditional inclined ejector rod, the cross distance of the straight ejector rod 2 can be reduced, avoiding the increase in mold size due to the installation of the ejector rod.

[0046] The straight push rod 2 is movably arranged in the vertical direction, and the top of the straight push rod 2 is slidably connected to the first guide part 11 in the horizontal direction; when the inclined top insert 1 is pushed in the vertical direction by the straight push rod 2, the inclined top insert 1 can move in the horizontal direction relative to the straight push rod 2 while rising.

[0047] The second guide portion 12 is slidably connected to the inclined guide rod 3, so that the inclined top insert 1 can move along the inclined direction of the inclined guide rod 3 as a whole. When the straight push rod 2 pushes the inclined top insert 1 upward, the inclined top insert 1 can move along the inclined direction of the inclined guide rod 3 under the guidance of the inclined guide rod 3. Figure 8 or Figure 9 Demolding is achieved by moving in the inclined upward direction as shown. Since the straight push rod 2 and the first guide part 11 are connected by sliding in the horizontal direction, the straight push rod 2 can be prevented from interfering with the movement of the inclined top insert 1, thereby ensuring the normal operation of the mold and improving the operating reliability of the mold.

[0048] It should be noted that because the size of the inclined guide rod 3 is much smaller than that of the inclined ejector rod in the prior art, the horizontal span of the inclined guide rod 3 is smaller, and the impact on the mold size is also smaller. In the present application, the straight ejector rod 2 is connected to the first guide portion 11 in a horizontal sliding direction, and the inclined guide rod 3 is connected to the second guide portion 12 in an inclined direction. This can convert the vertical push of the straight ejector rod 2 into the inclined movement of the inclined ejector insert 1, while ensuring the product demolding effect, reducing the overall size of the mold and improving the reliability of the mold operation.

[0049] In some embodiments of this application, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 There are two second guide parts 12, and the two second guide parts 12 are symmetrically arranged on both sides of the first guide part 11. When the first guide part 11 located in the middle of the bottom of the inclined top insert 1 is pushed by the straight push rod 2, the second guide parts 12 on both sides of the inclined top insert 1 can respectively cooperate with the two inclined guide rods 3 to achieve uniform guidance, thereby avoiding the inclined top insert 1 from swinging due to uneven force during the demoulding process, affecting the normal demoulding of the product.

[0050] In some embodiments of the present application, in order to prevent the first guide portion 11 from separating from the top of the straight push rod 2 when the straight push rod 2 is reset, thereby affecting the normal reset of the straight push rod 2 and the inclined top insert 1, the cross-sectional shape of the first guide portion 11 is preferably set to a shape that is larger at the top and smaller at the bottom, and the shape of the sliding portion 21 at the top of the straight push rod 2 matches the cross-sectional shape of the first guide portion 11. The sliding portion 21 can be limited by the first guide portion 11 to prevent the first guide portion 11 from separating from the sliding portion 21 at the top of the straight push rod 2 when the straight push rod 2 moves downward to reset.

[0051] As a specific embodiment of this application, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The first guide portion 11 is a T-shaped slot located at the bottom of the inclined roof insert 1. The sliding portion 21 is a T-shaped structure that matches the T-shaped slot. This prevents the sliding portion 21 from separating from the T-shaped slot (i.e., the first guide portion 11) when the straight ejector rod 2 moves downward. The second guide portion 12 is an inclined hole extending through the inclined roof insert 1. The inclined guide rod 3 can be inserted into the corresponding inclined hole, increasing the contact area between the inclined guide rod 3 and the second guide portion 12 and improving the stability of the fit between the second guide portion 12 and the inclined guide rod 3.

[0052] In some embodiments of the present application, in order to prepare an undercut structure on the product, the inclined top insert 1 further includes a protrusion 13. The shape of the protrusion 13 matches the shape of the undercut structure to be prepared, so that an undercut structure matching the protrusion 13 is formed on the surface of the product during injection molding. In the horizontal direction, the protrusion 13 is arranged on the side away from the demoulding direction. Specifically, when the inclined top insert 1 is along Figure 8 When demoulding is achieved by moving to the upper left, the protrusion 13 is arranged on the right side of the inclined top insert 1.

[0053] It is understandable that during the demolding process, since the product will also move upward synchronously under the action of the mold ejector, when the inclined top insert 1 moves along the inclined direction, the undercut structure formed on the outside of the product will not interfere with the protrusion 13 on the inclined top insert 1.

[0054] In some embodiments of this application, please refer to Figure 7 、 Figure 8 and Figure 9 The core-pulling mechanism also includes a vertically movable ejector plate assembly 4. The bottom of the straight ejector rod 2 is connected to the ejector plate assembly 4. When the ejector plate assembly 4 moves upward, it can drive the straight ejector rod 2 to move upward synchronously, thereby pushing the inclined ejector insert 1. Then, the inclined ejector insert 1 moves in an inclined direction under the guidance of the inclined guide rod 3 to achieve demolding. When the ejector plate assembly 4 moves downward, it can drive the straight ejector rod 2 to move downward to achieve reset. The inclined ejector insert 1 is also reset under the drive of the straight ejector rod 2.

[0055] It should be noted that the vertical drive design of the straight ejector 2 makes the core-pulling mechanism smaller in overall size and occupies less space. This solves the problem of traditional inclined ejector core-pulling mechanisms interfering with the ejection system due to the excessive span of the inclined ejector. This compact design facilitates more efficient layout within limited mold space and also provides greater flexibility in mold design.

[0056] In some embodiments of this application, please refer to Figure 4 and Figure 8 The connection between the bottom of the straight push rod 2 and the ejector plate assembly 4 is a detachable connection, which facilitates the maintenance and replacement of the straight push rod 2.

[0057] It should be noted that, in order to improve the connection reliability between the straight ejector rod 2 and the ejector plate assembly 4, the detachable connection between the straight ejector rod 2 and the ejector plate assembly 4 is preferably connected by screws.

[0058] In some embodiments of this application, please refer to Figure 7 and Figure 8The ejector plate assembly 4 includes an ejector panel 41, an ejector base plate 42 and a fixing screw 43. The ejector panel 41 is arranged above the ejector base plate 42, and a through hole is provided on the ejector panel 41, in which the bottom end of the straight ejector rod 2 is inserted. The ejector base plate 42 is provided with a countersunk hole that matches the fixing screw 43. The fixing screw 43 passes through the countersunk hole and is connected to the bottom end of the straight ejector rod 2, which can prevent the bolt head of the fixing screw 43 from protruding from the bottom of the ejector base plate 42, and prevent the ejector plate assembly 4 from causing squeezing damage to the fixing screw 43 when the ejector plate assembly 4 moves in the vertical direction. By connecting the fixing screw 43 to the bottom end of the straight ejector rod 2, the straight ejector rod 2 and the ejector plate assembly 4 can be connected into a whole, so that the ejector plate assembly 4 and the straight ejector rod 2 can move synchronously in the vertical direction.

[0059] In existing technologies, when a tilted ejector pin is used in a core-pulling mechanism, the screw at its base is also tilted. This not only makes disassembly difficult, but also causes the tilted screw to bear both axial and radial loads, making it prone to breakage. If a tilted screw breaks, the ejector pin and the insert cannot be properly reset, potentially damaging the mold during the reset process, interrupting production and impacting overall production progress.

[0060] In the present application, a fixing screw 43 is provided at the bottom of the straight ejector pin 2. The fixing screw 43 is arranged in the vertical direction, so that the fixing screw 43 only bears axial load (i.e., force in the vertical direction), which helps to improve the stress situation of the fixing screw 43 and increase the service life of the fixing screw 43. Because the length direction of the straight ejector pin 2 is consistent with the mold closing direction (both are in the vertical direction), this structure is less likely to cause the fixing screw 43 to break, which can improve the stability and safety of the core pulling mechanism and the injection mold. This improvement in safety is crucial to ensuring the stability and continuity of the production process, helping to reduce unexpected downtime and maintenance time, and improving production efficiency.

[0061] In some embodiments of this application, please refer to Figure 4 and Figure 8 A limiting portion 23 is provided at the bottom of the rod body 22 of the straight push rod 2, which can prevent the straight push rod 2 from rotating relative to the push pin plate assembly 4 when inserted into the push pin plate assembly 4, thereby affecting the sliding fit between the sliding portion 21 and the first guide portion 11.

[0062] Specifically, the through hole provided on the ejector panel 41 is a non-circular hole, and the cross-sectional shape of the through hole is D-shaped. The limiting portion 23 includes a vertical limiting surface parallel to the axis of the rod body 22, so that the cross-sectional shape of the bottom end of the rod body 22 is also D-shaped. When the bottom end of the rod body 22 with the limiting portion 23 is inserted into the through hole of the ejector panel 41, the straight ejector rod 2 will not rotate around its axis, which can ensure the stable fit between the sliding portion 21 and the first guide portion 11.

[0063] In some embodiments of this application, please refer to Figure 7 and Figure 8 The core pulling mechanism also includes a driving assembly, which is connected to the ejector plate assembly 4, driving the ejector plate assembly 4 and the straight ejector rod 2 to move in the vertical direction, thereby realizing the core pulling operation or the resetting operation.

[0064] In some embodiments of this application, please refer to Figure 7 and Figure 8 The driving assembly includes a KO insert 5, which is respectively connected to the ejector plate assembly 4 and the injection molding machine. The KO insert 5 can be driven to move by the injection molding machine, thereby driving the ejector plate assembly 4 and the straight ejector rod 2 to move through the KO insert 5.

[0065] In some embodiments of this application, please refer to Figure 7 、 Figure 8 and Figure 9 The core-pulling mechanism also includes a first fixing member 6, and the inclined guide rod 3 is connected to the first fixing member 6, which can realize the fixed installation of the inclined guide rod 3, so as to provide a stable guiding effect for the inclined top insert 1 through the inclined guide rod 3.

[0066] It should be noted that the core pulling mechanism of the present application can be used as a sliding core pulling mechanism. Compared with the traditional sliding core pulling mechanism, the core pulling mechanism provided by the present application has a smaller horizontal span space, which can avoid increasing the size of the injection mold and save the production cost of the injection mold.

[0067] See also Figures 1 to 9 In a second aspect, an embodiment of the present application provides an injection mold, comprising the core-pulling mechanism described in the above embodiment. Compared with other inclined ejector core-pulling mechanisms in the prior art, the core-pulling mechanism of the present application does not require auxiliary components such as an inclined ejector base, an inclined ejector rod guide sleeve, and an inclined ejector slide block, thereby simplifying the structure of the core-pulling mechanism and making the entire core-pulling mechanism more compact and concise. The elimination of the above auxiliary components not only reduces the use of materials and saves the internal space of the injection mold, but also reduces the complexity and working hours of injection mold processing, facilitates the maintenance and replacement of the injection mold, and helps to improve the durability and reliability of the injection mold.

[0068] In addition, the present application can achieve stable demoulding operation by cooperating with the straight ejector rod 2 and the inclined guide rod 3 respectively by the inclined ejector insert 1; the stable connection between the various components can improve the overall structural stability of the injection mold.

[0069] In some embodiments of the present application, the injection mold further includes a second fixing member 7 , and the injection mold can be fixed as a whole on the injection molding machine through the second fixing member 7 .

[0070] Specifically, the B plate in the injection mold is configured as the first fixing part 6, and the clamping plate of the injection mold is configured as the second fixing part 7. The first fixing part 6 and the second fixing part 7 are fixedly connected by connecting parts (such as screws, bolts, etc.) (not shown in the figure), and are in a stationary state during the entire ejection and demolding process, so that the inclined guide rod 3 can remain stationary, providing a stable guiding effect for the inclined top insert 1.

[0071] In some embodiments of this application, please refer to Figure 7 、 Figure 8 and Figure 9 The inclined top insert 1 is movably mounted within the first fixing member 6. A sliding cavity 61 is provided within the first fixing member 6 for the inclined top insert 1 to move tiltingly, preventing the first fixing member 6 from interfering with the movement of the inclined top insert 1. A first through-hole 62 is also provided at the bottom of the sliding cavity 61. The rod body 22 of the straight ejector rod 2 is vertically slidably connected to the first through-hole 62, allowing the top end of the straight ejector rod 2 to extend into the first fixing member 6 to push the inclined top insert 1, thereby facilitating product demolding.

[0072] In some embodiments of this application, please refer to Figure 7 and Figure 9 To achieve a fixed connection between the oblique guide rod 3 and the first fixing member 6, the oblique guide rod 3 includes a coaxially arranged guide rod body 31 and a screw rod 32. The guide rod body 31 is sleeved outside the screw rod 32 and is configured to slide in contact with the second guide portion 12. The bottom end of the screw rod 32 extends out of the guide rod body 31. The bottom of the sliding cavity 61 of the first fixing member 6 is provided with an inclined screw hole, which can be used to achieve a fixed connection with the bottom end of the screw rod 32.

[0073] In some embodiments of this application, please refer to Figure 7 and Figure 8 The second fixing member 7 is provided with a second through hole 71 and a third through hole 72. The second through hole 71 is slidably connected to the bottom of the KO insert 5, allowing the KO insert 5 to pass through the second fixing member 7 and achieve a driving connection with the push rod of the injection molding machine. The third through hole 72 is arranged opposite the countersunk hole on the ejector base plate 42, allowing a disassembly tool to pass through the bottom of the second fixing member 7 into the third through hole 72 and the countersunk hole to remove and install the fixing screw 43.

[0074] See also Figures 1 to 9 In some embodiments of the present application, the core pulling process of the above-mentioned injection mold is as follows:

[0075] Step 1: The KO insert 5 is driven upward by the injection molding machine; the KO insert 5 drives the ejector plate assembly 4 and the straight ejector rod 2 to move upward;

[0076] Step 2: The straight push rod 2 pushes the inclined top insert 1, and the inclined top insert 1 moves along the inclined guide rod 3. Figure 8The first guide portion 11 and the straight ejector 2 move to the upper left of the mold, and a relative movement occurs in the horizontal direction; during the upward movement of the straight ejector 2, the injection molded product also moves upward synchronously to facilitate demoulding;

[0077] Step 3: The product is completely separated from the inclined top insert 1, and the product is ejected after being successfully demoulded.

[0078] 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.

[0079] 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.

[0080] 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 core pulling mechanism, characterized in that: include: A sloping top insert (1), wherein a first guide portion (11) and a second guide portion (12) are provided on the sloping top insert (1), wherein the first guide portion (11) extends in a horizontal direction; and the extension direction of the second guide portion (12) is inclined relative to the horizontal direction. A straight push rod (2), wherein the length direction of the straight push rod (2) is parallel to the vertical direction, and the straight push rod (2) is movably arranged in the vertical direction, and the top of the straight push rod (2) is slidably connected to the first guide portion (11) in the horizontal direction; An inclined guide rod (3), wherein the second guide portion (12) is slidably connected to the inclined guide rod (3).

2. The core-pulling mechanism according to claim 1, characterized in that: The number of the second guide parts (12) is two, and the two second guide parts (12) are symmetrically arranged on both sides of the first guide part (11).

3. The core pulling mechanism according to claim 1, characterized in that: The first guide portion (11) is a T-shaped slide groove provided at the bottom of the inclined top insert (1), and the second guide portion (12) is an inclined hole provided through the inclined top insert (1).

4. The core-pulling mechanism according to any one of claims 1 to 3, characterized in that: It also includes a thimble plate assembly (4) movably arranged in the vertical direction, and the bottom of the straight thimble (2) is connected to the thimble plate assembly (4).

5. The core-pulling mechanism according to claim 4, characterized in that: The connection between the bottom of the straight ejector rod (2) and the ejector plate assembly (4) is a detachable connection.

6. The core-pulling mechanism according to claim 5, characterized in that: The ejector plate assembly (4) comprises an ejector panel (41), an ejector base plate (42) and a fixing screw (43); the ejector panel (41) is provided with a through hole, and the bottom end of the straight ejector rod (2) is inserted into the through hole; the ejector base plate (42) is provided with a countersunk hole matching the fixing screw (43), and the fixing screw (43) passes through the countersunk hole and is connected to the bottom end of the straight ejector rod (2).

7. The core-pulling mechanism according to claim 4, characterized in that: It also includes a driving assembly, which is connected to the ejector plate assembly (4) and drives the ejector plate assembly (4) and the straight ejector rod (2) to move in a vertical direction.

8. The core-pulling mechanism according to claim 7, characterized in that: The driving assembly comprises a KO insert (5), and the KO insert (5) is respectively connected to the ejector plate assembly (4) and the injection molding machine.

9. The core-pulling mechanism according to any one of claims 1 to 3, characterized in that: It also includes a first fixing member (6), and the oblique guide rod (3) is connected to the first fixing member (6).

10. An injection mold, characterized in that: It comprises the core pulling mechanism as described in any one of claims 1 to 9.

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