Three-plate mold

Abstract

This application discloses a three-plate mold, comprising: a front mold assembly and a rear mold assembly arranged opposite to each other; the front mold assembly includes a front mold insert, a front template, a sprue plate assembly, a manifold, a faceplate, and a hot runner assembly. The front mold insert has a first runner on its end face near the sprue plate assembly, and a second and a third runner penetrating through itself and connecting the first runner and the cavity. One end of the hot nozzle is fixed to the manifold, and the other end connects to the first runner. A hot nozzle sleeve is fitted onto the hot nozzle. The outer diameter of the undercut structure gradually decreases from the end near the front mold insert to the end away from the front mold insert. One end of the sprue hook is fixed to the sprue plate assembly, and the other end passes through the water bridge and is inserted into the third runner. The second runner is located between the hot nozzle sleeve and the front mold insert, and the undercut structure is located at the junction of the first and second runners. The three-plate mold of this application can be applied to situations where the product's injection point is in the middle area, so as to pull away the sprue corresponding to the hot nozzle and hot nozzle sleeve area.

Description

Technical Field

[0001] This application relates to the field of mold structure technology, and in particular to a three-plate mold. Background Technology

[0002] In related technologies, the three-plate mold is a three-plate mold base structure used in injection molding for fine sprue forming. It mainly consists of a front plate, a sprue plate, a front mold plate, and a rear mold plate. The mold plate is positioned by sprue edge pins and guide pillars and bushings, and anti-detachment limiting spacers are provided to ensure mold opening stability. The conventional practice is to use a sprue hook to pull the sprue. Fine sprue molds generally have a hot runner and a hot runner protective sleeve in the middle area. However, when the injection point of a certain product needs to be placed in the middle area, the sprue hook will interfere with the hot runner and the protective sleeve. Therefore, how to place the injection point near the corresponding hot runner and pull out the sprue is a problem that needs to be solved. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a three-plate mold that is applicable to situations where the product's glue injection point is in the middle area, and can successfully pull away the sprue corresponding to the hot nozzle and hot nozzle sleeve area, thus solving the problem of interference between the sprue hook and the hot nozzle and hot nozzle sleeve.

[0004] According to an embodiment of the present invention, a three-plate mold includes: a front mold assembly and a rear mold assembly disposed opposite to each other; the front mold assembly includes a front mold insert, a front template, a sprue plate assembly, a manifold plate, and a panel disposed sequentially away from the rear mold assembly; the front mold assembly also includes a hot runner assembly disposed on the side of the front mold insert away from the rear mold assembly; the hot runner assembly includes a hot nozzle, a hot nozzle sleeve, a water bridge, and a sprue hook; the end face of the front mold insert near the sprue plate assembly is provided with a first runner; the front mold insert is provided with a second runner and a third runner that penetrate itself and connect the first runner and the cavity; one end of the hot nozzle is fixed to the manifold plate, and the other end... The first flow channel is connected, the hot nozzle sleeve is fitted onto the hot nozzle, and the end of the hot nozzle sleeve located in the first flow channel has an undercut structure. The outer diameter of the undercut structure gradually decreases from the end near the front mold insert to the end away from the front mold insert. The water bridge is fixed to the side of the sprue plate near the front mold insert and fitted onto the hot nozzle sleeve. One end of the sprue hook is fixed to the sprue plate assembly, and the other end passes through the water bridge and is inserted into the third flow channel. The second flow channel is located between the hot nozzle sleeve and the front mold insert, and the undercut structure is located at the junction of the first flow channel and the second flow channel. The rear mold assembly includes a rear mold insert, a rear mold plate, and a base plate arranged sequentially away from the front mold assembly.

[0005] The three-plate mold according to the embodiments of this utility model has at least the following beneficial effects: This three-plate mold includes a front mold assembly and a rear mold assembly. The front mold assembly includes a front mold insert, a front template, a sprue plate assembly, a manifold plate, a faceplate, and a hot runner assembly. The hot runner assembly is disposed between the front mold insert and the manifold plate and includes a hot nozzle, a hot nozzle sleeve, a water bridge, and a sprue hook. The hot nozzle, hot nozzle sleeve, and water bridge are sequentially nested. The front mold insert has a first runner, a second runner, and a third runner. The first runner is located on the side of the front mold insert facing the hot nozzle. The second and third runners both connect to the first runner and the cavity. The sprue hook is located outside the hot nozzle sleeve, with one end attached to the sprue plate assembly. The other end is inserted into the first runner and faces the third runner, so that after the mold is opened, the sprue in the third runner can be pulled away by the sprue hook. An undercut structure is provided on the side of the hot nozzle sleeve facing the front mold insert. The undercut structure is inserted into the first runner and faces the second runner. The outer diameter of the undercut structure gradually decreases from the end closer to the front mold insert to the end farther away from the front mold insert. So that after the mold is opened, the sprue in the second runner can be pulled away by the undercut structure. Therefore, the three-plate mold of this application can be applied to the case where the product injection point is in the middle area, and can successfully pull away the sprue in the corresponding hot nozzle and hot nozzle sleeve area, solving the problem of interference between the sprue hook and the hot nozzle and hot nozzle sleeve.

[0006] According to some embodiments of this utility model, the inverted structure is conical in shape.

[0007] According to some embodiments of this utility model, the inverted structure and the second flow channel are both offset from the center line of the hot nozzle.

[0008] According to some embodiments of the present invention, a side core-pulling mechanism is also included. The side core-pulling mechanism includes a driving component and a sliding insert. One end of the sliding insert is located on one side of the cavity. The output end of the driving component is connected to one end of the sliding insert and is used to drive the sliding insert to move in a direction perpendicular to the mold opening and closing direction.

[0009] According to some embodiments of the present invention, the driving assembly includes an inclined guide post and a sliding seat. The inclined guide post is fixed at an acute angle to the opening and closing direction on the side of the rear mold plate facing the front mold assembly. The sliding seat is slidably disposed on the side of the front mold plate facing the rear mold plate. The sliding seat is provided with a first guide groove that matches the shape of the inclined guide post and can move in a direction perpendicular to the opening and closing direction under the guidance of the inclined guide post. The sliding insert is fixed to the sliding seat.

[0010] According to some embodiments of the present invention, the lateral core-pulling mechanism further includes a shovel, which is embedded in the side of the rear template facing the front template and located away from the side of the row position seat connecting the row position insert.

[0011] According to some embodiments of the present invention, the side core pulling mechanism further includes a wear-resistant block, which is located on the side of the slide seat away from the slide insert and is positioned between the shovel and the slide seat when the mold is closed.

[0012] According to some embodiments of the present invention, it also includes an ejection mechanism, which is disposed on the front mold assembly.

[0013] According to some embodiments of the present invention, the ejection mechanism includes an ejector plate assembly and a first ejector pin. The ejector plate assembly is located between the sprue plate assembly and the front mold plate. One end of the first ejector pin passes through the front mold insert and is inserted into the cavity, while the other end is fixed to the ejector plate assembly. It can eject the product under the drive of the ejector plate assembly.

[0014] According to some embodiments of the present invention, the ejection mechanism further includes a second ejector pin and an inclined ejector pin. A guide plate is also provided between the ejector pin plate assembly and the front mold insert. The guide plate is provided with a second guide groove that penetrates itself. The front mold insert is provided with a third guide groove that penetrates itself. The third guide groove connects the second guide groove and the cavity. One end of the second ejector pin is fixed to the ejector pin plate assembly, and the other end is connected to one end of the inclined ejector pin. The inclined ejector pin is set at an acute angle to the mold opening and closing direction, and the other end is located in the cavity for molding the undercut part of the product.

[0015] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the three-plate mold of this utility model;

[0018] Figure 2 for Figure 1 One of the cross-sectional views of the three-plate mold shown;

[0019] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0020] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0021] Figure 5 for Figure 1 Another cross-sectional view of the three-plate mold shown.

[0022] Figure label:

[0023] Front mold insert 100; First runner 110; Second runner 120; Third runner 130; Third guide groove 140; Front mold plate 200; Sprue plate assembly 300; Manifold 400; Panel 500; Hot runner assembly 600; Hot nozzle 610; Hot nozzle sleeve 620; Undercut structure 621; Water bridge 630; Sprue hook 640; Rear mold insert 700; Cavity 710; Rear mold plate 800; Base plate 900; Side core pulling mechanism 1000; Slide insert 1010; Angled guide post 1020; Slide seat 1030; First guide groove 1031; Scraper 1040; Wear block 1050; Ejector mechanism 1100; Ejector plate assembly 1110; First ejector pin 1120; Second ejector pin 1130; Angled ejector pin 1140; Guide plate 1200. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0028] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The following is for reference. Figures 1 to 5 A three-plate mold is described in the embodiment of this utility model.

[0030] like Figures 1 to 3 As shown, the three-plate mold according to an embodiment of the present invention includes: a front mold assembly and a rear mold assembly arranged opposite to each other; the front mold assembly includes a front mold insert 100, a front template 200, a sprue plate assembly 300, a manifold plate 400, and a panel 500 arranged sequentially away from the rear mold assembly; the front mold assembly also includes a hot runner assembly 600 disposed on the side of the front mold insert 100 away from the rear mold assembly; the hot runner assembly 600 includes a hot nozzle 610, a hot nozzle sleeve 620, a water bridge 630, and a sprue hook 640; the end face of the front mold insert 100 near the sprue plate assembly 300 is provided with a first flow channel 110; the front mold insert 100 is provided with a second flow channel 120 and a third flow channel 130 penetrating itself and connecting the first flow channel 110 and the cavity 710; one end of the hot nozzle 610 is fixed to the manifold plate 400, and the other end is connected to the first flow channel 120 and the third flow channel 130. A runner 110 is provided, a hot nozzle sleeve 620 is fitted onto a hot nozzle 610, and a snap-fit ​​structure 621 is provided at one end of the hot nozzle sleeve 620 located in the first runner 110. The outer diameter of the snap-fit ​​structure 621 gradually decreases from the end near the front mold insert 100 to the end away from the front mold insert 100. A water bridge 630 is fixed to the side of the sprue plate near the front mold insert 100 and fitted onto the hot nozzle sleeve 620. One end of the sprue hook 640 is fixed to the sprue plate assembly 300, and the other end passes through the water bridge 630 and is inserted into the third runner 130. The second runner 120 is located between the hot nozzle sleeve 620 and the front mold insert 100. The snap-fit ​​structure 621 is located at the junction of the first runner 110 and the second runner 120. The rear mold assembly includes a rear mold insert 700, a rear mold plate 800 and a base plate 900 arranged sequentially away from the front mold assembly.

[0031] Understandably, this three-plate mold includes a front mold assembly and a rear mold assembly. The front mold assembly includes a front mold insert 100, a front plate 200, a sprue plate assembly 300, a manifold 400, a faceplate 500, and a hot runner assembly 600. The hot runner assembly 600 is located between the front mold insert 100 and the manifold 400 and includes a hot runner nozzle 610, a hot runner nozzle sleeve 620, a water bridge 630, and a sprue hook 640. The nozzle 610, hot nozzle sleeve 620, and water bridge 630 are stacked sequentially. The front mold insert 100 is provided with a first runner 110, a second runner 120, and a third runner 130. The first runner 110 is located on the side of the front mold insert 100 facing the hot nozzle 610. The second runner 120 and the third runner 130 are both connected to the first runner 110 and the cavity 710. The sprue hook 640 is located on the outside of the hot nozzle sleeve 620 and one end is located on the sprue plate. Component 300, with one end inserted into the first runner 110 and facing the third runner 130, allows the sprue in the third runner 130 to be pulled away by the sprue hook 640 after mold opening. An undercut structure 621 is provided on the side of the hot nozzle sleeve 620 facing the front mold insert 100. The undercut structure 621 is inserted into the first runner 110 and faces the second runner 120. The outer diameter of the undercut structure 621 gradually decreases from the end near the front mold insert 100 to the end away from the front mold insert 100, allowing the sprue in the second runner 120 to be pulled away after mold opening. Therefore, the three-plate mold of this application is suitable for situations where the product's injection point is in the middle area, and can successfully pull away the sprue in the corresponding area of ​​the hot nozzle 610 and hot nozzle sleeve 620, solving the problem of interference between the sprue hook 640 and the hot nozzle 610 and hot nozzle sleeve 620.

[0032] The cavity 710 is located between the front mold insert 100 and the rear mold insert 700, and is used to form the cavity of the product.

[0033] Understandably, the inverted structure 621 is conical in shape. For example, as... Figure 3 As shown, in this embodiment, the undercut structure 621 can be conical, pyramidal, or even other irregular shapes, as long as the outer diameter gradually decreases from the end near the front mold insert 100 to the end away from the front mold insert 100.

[0034] It is understandable that the inverted structure 621 and the second flow channel 120 are both offset from the centerline of the hot nozzle 610. For example, as Figure 3 As shown, in this embodiment, the inverted structure 621 and the second flow channel 120 are offset from the center line of the hot nozzle 610 to avoid forming a dead material zone, ensuring the appearance quality of the product, and at the same time realizing the pulling of the sprue.

[0035] It is understood that a side core-pulling mechanism 1000 is also included. The side core-pulling mechanism 1000 includes a drive assembly and a sliding insert 1010. One end of the sliding insert 1010 is located on one side of the cavity 710. The output end of the drive assembly is connected to one end of the sliding insert 1010 and is used to drive the sliding insert 1010 to move in a direction perpendicular to the mold opening and closing direction. For example, as... Figures 1 to 4 As shown, in this embodiment, a lateral core-pulling mechanism 1000 is also provided. This mechanism includes a driving component and a sliding insert 1010. The output end of the driving component is connected to the sliding insert 1010, thereby driving the sliding insert 1010 to insert into or move away from the cavity 710, thereby enabling the molding or demolding of the groove on the side wall of the product.

[0036] It is understood that the drive assembly includes a slanted guide post 1020 and a slide seat 1030. The slanted guide post 1020 is fixed at an acute angle to the mold opening and closing direction on the side of the rear mold plate 800 facing the front mold assembly. The slide seat 1030 is slidably disposed on the side of the front mold plate 200 facing the rear mold plate 800. The slide seat 1030 has a first guide groove 1031 that matches the shape of the slanted guide post 1020 and can move in a direction perpendicular to the mold opening and closing direction under the guidance of the slanted guide post 1020. The slide insert 1010 is fixed to the slide seat 1030. For example, as Figures 1 to 4 As shown, in this embodiment, the driving assembly includes a slide seat 1030 disposed on the front template 200 and an inclined guide post 1020 disposed on the rear template 800. The slide seat 1030 is connected to the slide insert 1010 and is provided with a first guide groove 1031 adapted to the inclined guide post 1020. Thus, during the mold closing process, the first guide groove 1031 of the slide seat 1030 can move along the direction perpendicular to the mold opening and closing direction under the guidance of the inclined guide post 1020, thereby driving the slide insert 1010 to be inserted into the cavity 710 so as to form the hole or groove of the side wall of the product. After the mold is opened, the slide seat 1030 can drive the slide insert 1010 away from the cavity 710 under the action of the inclined guide post 1020 to realize core pulling.

[0037] It is understood that the lateral core-pulling mechanism 1000 also includes a scraper 1040, which is embedded in the rear template 800 on the side facing the front template 200, and located away from the side where the slide seat 1030 connects to the slide insert 1010. For example, as Figure 4 As shown, in this embodiment, the lateral core-pulling mechanism 1000 also includes a shovel 1040 disposed on the rear template 800. When the mold is closed, the shovel 1040 is located on the side of the slide seat 1030 away from the slide insert 1010, which ensures the support and positioning of the slide seat 1030 and prevents the slide seat 1030 from moving backward.

[0038] It is understood that the side core-pulling mechanism 1000 also includes a wear-resistant block 1050, which is located on the side of the slide seat 1030 away from the slide insert 1010, and is positioned between the shovel 1040 and the slide seat 1030 during mold closing. For example, as Figure 4 As shown, in this embodiment, a wear-resistant block 1050 is provided on the side of the slide seat 1030 near the shovel 1040, so that the wear-resistant block 1050 and the shovel 1040 can be resisted and rubbed during mold closing, avoiding friction between the slide seat 1030 and the shovel 1040, reducing the wear of the slide seat 1030, and extending the service life of the slide seat 1030.

[0039] Understandably, it also includes an ejector mechanism 1100, which is located on the front mold assembly. For example, as... Figures 3 to 5 As shown, in this embodiment, the three-plate mold is an inverted mold structure, so the ejection mechanism 1100 for ejecting the molded product is located in the front mold assembly.

[0040] It is understood that the ejection mechanism 1100 includes an ejector plate assembly 1110 and a first ejector pin 1120. The ejector plate assembly 1110 is located between the sprue plate assembly 300 and the front mold plate 200. One end of the first ejector pin 1120 passes through the front mold insert 100 and is inserted into the cavity 710, while the other end is fixed to the ejector plate assembly 1110, and can eject the product under the drive of the ejector plate assembly 1110. For example, as... Figure 3 As shown, in this embodiment, the ejection mechanism 1100 includes an ejector plate assembly 1110 disposed on the side of the sprue plate assembly 300 near the front mold insert 100 and a first ejector pin 1120. The first ejector pin 1120 can move toward the front mold insert 100 under the drive of the ejector plate assembly 1110 to eject the product.

[0041] It is understood that the ejection mechanism 1100 also includes a second ejector pin 1130 and a slanted ejector pin 1140. A guide plate 1200 is also provided between the ejector plate assembly 1110 and the front mold insert 100. The guide plate 1200 has a second guide groove that penetrates itself, and the front mold insert 100 has a third guide groove 140 that penetrates itself. The third guide groove 140 connects the second guide groove and the cavity 710. One end of the second ejector pin 1130 is fixed to the ejector plate assembly 1110, and the other end is connected to one end of the slanted ejector pin 1140. The slanted ejector pin 1140 is set at an acute angle to the mold opening and closing direction, and the other end is located in the cavity 710 for molding the undercut portion of the product. For example, as Figure 5As shown, in this embodiment, the ejection mechanism 1100 further includes a second ejector pin 1130 and an inclined ejector pin 1140 connected sequentially to the ejector plate assembly 1110. The inclined ejector pin 1140 is connected to the end of the second ejector pin 1130 away from the ejector plate assembly 1110. The front mold insert 100 is provided with a third guide groove 140 adapted to the inclined ejector pin 1140. Therefore, after mold opening, while ejecting the product, the second ejector pin 1130 can drive the inclined ejector pin 1140 to move under the drive of the ejector plate assembly 1110, so that the end of the inclined ejector pin 1140 used for molding the undercut part of the product can be demolded, so as to smoothly realize the ejection action of the product. The second guide groove in the guide plate 1200 can ensure the linearity of the movement of the first ejector pin 1120 and the second ejector pin 1130, so as to ensure the smooth progress of the ejection action.

[0042] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A three-plate mold characterized by, This includes the front mold assembly and the rear mold assembly that are positioned relative to each other; The front mold assembly includes a front mold insert, a front template, a sprue plate assembly, a manifold, and a panel, arranged sequentially away from the rear mold assembly. The front mold assembly also includes a hot runner assembly located on the side of the front mold insert away from the rear mold assembly. The hot runner assembly includes a hot nozzle, a hot nozzle sleeve, a water bridge, and a sprue hook. The end face of the front mold insert near the sprue plate assembly has a first runner. The front mold insert has a second runner and a third runner that penetrate itself and connect the first runner to the mold cavity. One end of the hot nozzle is fixed to the manifold, and the other end connects to the first runner. A hot nozzle sleeve is fitted onto the hot nozzle, and the hot nozzle sleeve has an undercut structure at one end of the first flow channel. The outer diameter of the undercut structure gradually decreases from the end near the front mold insert to the end away from the front mold insert. The water bridge is fixed to the side of the sprue plate near the front mold insert and fitted onto the hot nozzle sleeve. One end of the sprue hook is fixed to the sprue plate assembly, and the other end passes through the water bridge and is inserted into the third flow channel. The second flow channel is located between the hot nozzle sleeve and the front mold insert. The undercut structure is located at the junction of the first flow channel and the second flow channel. The rear mold assembly includes a rear mold insert, a rear template, and a base plate arranged sequentially away from the front mold assembly.

2. The tri-plate module of claim 1, wherein, The inverted structure is conical in shape.

3. The triplate mode of claim 1, wherein, Both the inverted structure and the second flow channel are offset from the centerline of the hot nozzle.

4. The tri-plate module of claim 1, wherein, It also includes a side core-pulling mechanism, which includes a drive assembly and a slide insert. One end of the slide insert is located on one side of the cavity. The output end of the drive assembly is connected to one end of the slide insert and is used to drive the slide insert to move in a direction perpendicular to the mold opening and closing direction.

5. The tri-plate die of claim 4, wherein, The drive assembly includes an inclined guide post and a slide seat. The inclined guide post is fixed at an acute angle to the opening and closing direction on the side of the rear mold plate facing the front mold assembly. The slide seat is slidably disposed on the side of the front mold plate facing the rear mold plate. The slide seat is provided with a first guide groove that matches the shape of the inclined guide post and can move in a direction perpendicular to the opening and closing direction under the guidance of the inclined guide post. The slide insert is fixed to the slide seat.

6. The tri-plate die of claim 5, wherein, The lateral core-pulling mechanism also includes a shovel, which is embedded in the side of the rear template facing the front template and located away from the side where the row seat connects to the row insert.

7. The tri-plate die of claim 6, wherein, The lateral core-pulling mechanism also includes a wear-resistant block, which is located on the side of the slide seat away from the slide insert and is positioned between the shovel and the slide seat during mold closing.

8. The tri-plate module of claim 1, wherein, It also includes an ejection mechanism, which is located on the front mold assembly.

9. The tri-plate die of claim 8, wherein, The ejection mechanism includes an ejector plate assembly and a first ejector pin. The ejector plate assembly is located between the sprue plate assembly and the front mold plate. One end of the first ejector pin passes through the front mold insert and is inserted into the cavity, while the other end is fixed to the ejector plate assembly. The ejector pin assembly can eject the product under its drive.

10. The three-plate mold according to claim 9, characterized in that, The ejection mechanism further includes a second ejector pin and an angled ejector pin. A guide plate is provided between the ejector pin plate assembly and the front mold insert. The guide plate has a second guide groove that penetrates itself. The front mold insert has a third guide groove that penetrates itself. The third guide groove connects the second guide groove and the cavity. One end of the second ejector pin is fixed to the ejector pin plate assembly, and the other end is connected to one end of the angled ejector pin. The angled ejector pin is set at an acute angle to the mold opening and closing direction, and the other end is located in the cavity for forming the undercut part of the product.

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