Large large-angle inclined pulling mechanism of injection mold

Abstract

The utility model discloses a large-scale large-angle inclined pulling mechanism of an injection mold, which is mounted on a front mold plate of the injection mold and comprises an inclined pulling core and a sliding block capable of sliding along the direction perpendicular to the mold opening and closing direction of the injection mold, the inclined loose core is installed on the sliding block in a sliding mode and obliquely inserted into the front mold plate and a front mold core arranged on the front mold plate, and a glue position forming face is arranged at the end, away from the sliding block, of the inclined loose core and located in a cavity of the injection mold; a glue sealing part section is arranged at the position, close to the glue position forming surface, of the inclined loose core, and the fit clearance between the glue sealing part section and the front mold core is smaller than the fit clearance between the other part sections, except the glue sealing part section, of the inclined loose core and the front mold core; a supporting block is fixedly installed on the front mold plate and abuts against the side face of the inclined loose core. The inclined core pulling mechanism can ensure that the inclined core pulling is uniformly stressed, reduces the occurrence rate of scratching and biting at a glue sealing position, reduces the maintenance frequency of the mold, improves the qualification rate and appearance quality of products, and shortens the molding period of the mold.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a large-angle inclined extraction mechanism for injection molds. Background Technology

[0002] In the field of injection mold making, the application of large, high-angle angled sliding blocks is crucial, often used to mold plastic products with special structures. However, these angled sliding blocks currently face many challenging problems in practical use, seriously affecting mold performance, product quality, and production efficiency.

[0003] During mass production, the mold temperature will rise due to continuous operation. In order to reduce the resulting damage, biting, and jamming, a clearance is usually set to reduce the friction surface of the inclined slide block. This is because if the clearance of the contact surface of the inclined slide block is not increased, the sliding clearance will change as the mold temperature rises, which will cause the frictional resistance to increase sharply. The inclined slide block is very prone to jamming, which seriously affects the continuity of production.

[0004] However, adding clearance has introduced new problems. Due to the clearance design, and the need for appropriate clearances between the components of the angled drawing mechanism, the force on the angled drawing slider changes during movement, especially at the sealing opening. This uneven force easily leads to scratches and scoring. Once these problems occur at the sealing point, it can cause burrs or excess glue, severely affecting the product's appearance and dimensional accuracy. Moreover, the larger the angle of the angled drawing slider, the more likely these scratches and scoring due to uneven force will occur. The running speed of the angled drawing slider cannot be increased, significantly reducing the stability of mold quality, lengthening product molding cycles, increasing mold maintenance frequency, and severely impacting the company's production efficiency. Therefore, it is necessary to improve the existing technology to overcome its shortcomings. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a large-angle inclined pulling mechanism for injection molds, so as to overcome the defects of existing large-angle inclined pulling mechanisms for injection molds, such as poor stability, high maintenance frequency and long molding cycle.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a large-angle inclined core pulling mechanism for injection molds, installed on the front template of the injection mold, comprising an inclined core pulling mechanism and a slider that can slide in a direction perpendicular to the opening and closing direction of the injection mold. The inclined core pulling mechanism is slidably installed on the slider and obliquely inserted into the front template and the front mold core disposed on the front template. The end of the inclined core pulling mechanism away from the slider has a glue-forming surface, which is located in the cavity of the injection mold. A sealing section is provided on the inclined core pulling mechanism near the glue-forming surface. The fit clearance between the sealing section and the front mold core is smaller than the fit clearance between the other sections of the inclined core pulling mechanism (excluding the sealing section) and the front mold core. A support block is fixedly installed on the front template, and the support block abuts against the side of the inclined core pulling mechanism.

[0007] As a further improvement of this utility model, the fitting gap between the sealing section and the front mold core is 0.01mm-0.02mm.

[0008] As a further improvement of this utility model, the fitting clearance between the remaining sections of the inclined core puller, excluding the sealing section, and the front mold core is 1mm-2mm.

[0009] As a further improvement of this utility model, the diameter of the sealing section gradually increases from one end close to the adhesive molding surface toward the other end, thereby making the sealing section truncated cone shape.

[0010] As a further improvement of this utility model, the thickness of the sealing section is 20mm-30mm.

[0011] As a further improvement of this utility model, the support block is L-shaped, and one end of it is provided with a support surface that is at the same inclination angle as the side of the inclined core puller, and the support surface is in contact with the side of the inclined core puller.

[0012] As a further improvement of this utility model, the large-angle inclined core-pulling mechanism of the injection mold also includes a core-pulling driving device fixedly installed on the side of the front template. The core-pulling driving device is fixedly connected to the slider and is used to drive the slider to slide in a direction perpendicular to the opening and closing direction of the injection mold, while driving the inclined core-pulling device to slide at a set angle.

[0013] As a further improvement of this utility model, the slider is provided with a T-shaped oblique groove, and the other end of the oblique core puller is fixed with a T-shaped slider, which slides within the T-shaped oblique groove.

[0014] As a further improvement of this utility model, a front limiting block and a rear limiting block are fixedly installed on the front template. The front limiting block and the rear limiting block are respectively arranged on both sides of the slider facing the sliding direction, and are used to stop the slider to limit its movement stroke.

[0015] As a further improvement of this utility model, the included angle between the inclined core and the slider is 100°-140°.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a large-angle inclined core-pulling mechanism for injection molds. By setting the inclined core-pulling mechanism to have sections with different diameters and precisely controlling the fitting clearance of the corresponding sections, and by installing a support block on the front platen that always supports the inclined core-pulling mechanism, it avoids the problems of increased resistance and jamming caused by excessively small clearances and increased mold temperature, and also eliminates the phenomenon of burrs caused by excessively large clearances. It also ensures that the inclined core-pulling mechanism is subjected to uniform force. Even when the mold is working for a long time and the temperature rises, the inclined core-pulling mechanism can still maintain stable sliding performance, significantly reducing the incidence of scratches and bites at the sealing position, reducing the frequency of mold maintenance, improving the product qualification rate and appearance quality, and shortening the mold forming cycle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the large-angle inclined extraction mechanism of the injection mold of this utility model installed on the front mold;

[0019] Figure 2 This is a perspective view of the large-angle inclined extraction mechanism of the injection mold of this utility model installed on the front mold from another angle.

[0020] Figure 3 This is a cross-sectional view of the large-angle inclined extraction mechanism of the injection mold of this utility model installed on the front mold;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of section A;

[0022] Figure 5 This is a perspective view of the large-angle inclined extraction mechanism of the injection mold of this utility model;

[0023] Figure 6This is a perspective view of the inclined core pulling mechanism in the large-angle inclined pulling mechanism of the injection mold of this utility model.

[0024] Referring to the accompanying drawings, the following explanations are provided:

[0025] 1. Front mold plate; 2. Angled core puller; 201. Glue forming surface; 202. Sealing section; 3. Slider; 301. T-shaped slanted slide; 4. Front mold core; 5. Support block; 501. Support surface; 6. Core pulling drive device; 7. T-shaped slider; 8. Front limit block; 9. Rear limit block; 10. Wear-resistant plate; 100. Plastic product. Detailed Implementation

[0026] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0031] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0032] See Figures 1 to 6 This utility model provides a large-angle inclined pulling mechanism for injection molds, which is installed on the front template 1 of the injection mold, wherein the front template 1 is provided with a front mold core. The large-angle inclined pulling mechanism for injection molds includes an inclined core pulling 2, a slider 3, and a support block 5.

[0033] The slider 3 is mounted on the front template 1 and can slide in a direction perpendicular to the mold opening and closing direction. The inclined core puller 2 is slidably mounted on the slider 3 and is inclinedly inserted into the inclined holes of the front template 1 and the front mold core 4. In this invention, the inclined core puller 2 is inclined at a large angle, and the included angle between it and the slider 3 is 100°-140°, specifically 120° in this embodiment.

[0034] Furthermore, the end of the inclined core puller 2 away from the slider 3 has a glue-forming surface 201, which is located in the cavity of the injection mold and is used to form the undercut part of the plastic product 100.

[0035] See Figure 3 and Figure 4 The support block 5 is fixedly installed on the front template 1, and one end of the support block 5 abuts against the side of the inclined core pull 2. Simultaneously, this invention provides a sealing section 202 near the glue-forming surface 201 of the inclined core pull 2. By setting a suitable fitting clearance between the sealing section 202 and the front mold core 4, burrs or excess glue are prevented. Furthermore, this invention provides clearance in the remaining sections of the inclined core pull 2, excluding the sealing section 202; that is, the fitting clearance between the remaining sections of the inclined core pull 2, excluding the sealing section 202, and the front mold core 4 and the front template 1 is set to be much larger than the fitting clearance between the sealing section 202 and the front mold core 4. By setting the inclined core pull 2 ​​with sections of different diameters and precisely controlling the fitting clearance of the corresponding sections, this invention avoids both increased resistance and jamming caused by excessively small clearances and increased mold temperature, and eliminates burr problems caused by excessively large clearances.

[0036] During the core pulling or resetting process of the inclined core puller 2, the support block 5 always supports the inclined core puller 2, thus ensuring that the inclined core puller 2 is subjected to uniform force. This effectively solves the problem of uneven force caused by the setting of clearance. Even when the mold is working for a long time and the temperature rises, the inclined core puller 2 can still maintain stable sliding performance, significantly reducing the incidence of scratches and bites at the sealing position, reducing the maintenance frequency of the mold, effectively preventing the occurrence of burrs or excessive glue, improving the product qualification rate and appearance quality, and shortening the mold forming cycle.

[0037] Prioritized, the fit clearance between the sealing section 202 and the front mold core 4 is 0.01mm-0.02mm, specifically 0.02mm in this embodiment; the fit clearance between the remaining sections of the inclined core pull 2 ​​(excluding the sealing section 202) and the front mold core 4 and front template 1 is 1mm-2mm, specifically 2mm in this embodiment. This invention optimizes the fit clearances of each section of the inclined core pull 2, avoiding both increased resistance and jamming caused by excessively small clearances, and eliminating burr-like defects caused by excessively large clearances. This ensures the smooth operation of the inclined core pull 2 ​​under different production environments and mold temperatures, guaranteeing product precision and quality.

[0038] See Figure 6 The diameter of the sealing section 202 gradually increases from one end close to the molding surface 201 toward the other end, thus making the sealing section 202 into a frustum shape. This can further reduce the incidence of scratches and bites at the sealing position, and also make it more conducive to the core pulling and resetting action of the oblique core pulling 2.

[0039] Preferably, the thickness of the sealing section 202 is 20mm-30mm. In this embodiment, 20mm is used. This thickness design can minimize the contact area between the inclined core puller 2 and the front mold core 4 while ensuring the sealing function is achieved, thereby reducing friction.

[0040] like Figure 5 As shown, the support block 5 in this utility model is L-shaped, with a support surface 501 at one end that has the same inclination angle as the side of the inclined core puller 2, and the support surface 501 is attached to the side of the inclined core puller 2; the other end is fixedly connected to the front template 1 by screws. It should be noted that the area of ​​the support surface 501 is much smaller than the side area of ​​the inclined core puller 2.

[0041] See Figure 3 and Figure 5 The slider 3 is provided with a T-shaped inclined groove 301, and a T-shaped slider 7 is fixed to the other end of the inclined core puller 2. The T-shaped slider 7 slides within the T-shaped inclined groove 301. Furthermore, to avoid wear during the sliding of the slider 3, a wear-resistant plate 10 is also fixed to the front template 1. Figure 3In the indicated orientation, the wear-resistant plate 10 is attached to the bottom of the slider 3, and the slider 3 and the wear-resistant plate 10 are in sliding contact.

[0042] The large-angle inclined pulling mechanism of this utility model injection mold also includes a core pulling drive device 6 fixedly installed on the side of the front template 1. The core pulling drive device 6 is fixedly connected to the slider 3 through a connecting block. The core pulling drive device 6 is used to drive the slider 3 to slide in a direction perpendicular to the mold opening and closing direction of the injection mold. At the same time, with the cooperation of the T-shaped slider 7 and the T-shaped inclined slide groove 301, it drives the inclined core pulling 2 to slide along the set angle.

[0043] For example, the core-pulling drive device 6 can be a hydraulic cylinder.

[0044] In the mold closing state, in order to prevent the inclined core pull 2 ​​from retracting due to the plastic injection pressure, the hydraulic cylinder needs to apply sufficient pressure. This utility model uses the support block 5 to support the inclined core pull 2, ensuring that the inclined core pull 2 ​​maintains a specific tilt angle under the strong pressure of the hydraulic cylinder, thus ensuring the molding quality.

[0045] In addition, such as Figure 2 and Figure 3 As shown, a front limit block 8 and a rear limit block 9 are also fixedly installed on the front template 1. The front limit block 8 and the rear limit block 9 are respectively arranged on both sides of the slider 3 facing the sliding direction, which are used to stop the slider 3 to limit its movement stroke and ensure accurate core pulling and reset positions.

[0046] Therefore, the large-angle inclined core-pulling mechanism of this utility model for injection molds, by setting the inclined core-pulling part 2 as a structure with different diameter sections and precisely controlling the fitting clearance of the corresponding sections, and by installing a support block 5 on the front platen 1 to always support the inclined core-pulling part 2, not only avoids the problem of increased resistance and jamming caused by too small clearance and increased mold temperature, but also eliminates the phenomenon of burrs caused by too large clearance. It can also ensure that the inclined core-pulling part 2 is subjected to uniform force. Even when the mold is working for a long time and the temperature rises, the inclined core-pulling part 2 can still maintain stable sliding performance, significantly reducing the incidence of scratches and bites at the sealing position, reducing the maintenance frequency of the mold, improving the product qualification rate and appearance quality, and shortening the mold forming cycle.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A large-angle inclined pulling mechanism of an injection mold, which is installed on a front mold plate (1) of the injection mold, and comprises an inclined pulling core (2) and a sliding block (3) capable of sliding in a direction perpendicular to the opening and closing direction of the injection mold, the inclined pulling core (2) being slidingly installed on the sliding block (3) and being obliquely inserted into the front mold plate (1) and a front mold cavity (4) arranged on the front mold plate (1), and the inclined pulling core (2) having a glue position forming surface (201) at one end away from the sliding block (3), the glue position forming surface (201) being located in a cavity of the injection mold; characterized in that: The inclined core (2) is provided with a glue sealing section (202) near the glue position forming surface (201), and the cooperation gap between the glue sealing section (202) and the front mold core (4) is smaller than the cooperation gap between the remaining sections of the inclined core (2) except the glue sealing section (202) and the front mold core (4); the front mold plate (1) is fixedly provided with a supporting block (5) abutting against the side surface of the inclined core (2).

2. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The cooperation gap between the glue sealing section (202) and the front mold core (4) is 0.01mm-0.02mm.

3. The large angle large scale injection mold angle draft mechanism of claim 2, wherein: The cooperation gap between the remaining sections of the inclined core (2) except the glue sealing section (202) and the front mold core (4) is 1mm-2mm.

4. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The diameter of the glue sealing section (202) gradually increases from one end near the glue position forming surface (201) to the other end, so that the glue sealing section (202) is in the shape of a circular truncated cone.

5. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The thickness of the glue sealing section (202) is 20mm-30mm.

6. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The supporting block (5) is in the shape of L, one end of which is provided with a supporting surface (501) consistent with the inclination angle of the side surface of the inclined core (2), and the supporting surface (501) is attached to the side surface of the inclined core (2).

7. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The front mold plate (1) is further provided with a core driving device (6) fixedly installed on the side surface of the front mold plate (1), which is fixedly connected to the sliding block (3) and used to drive the sliding block (3) to slide in the direction perpendicular to the opening and closing direction of the injection mold, and simultaneously drive the inclined core (2) to slide at a set angle.

8. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The sliding block (3) is provided with a T-shaped inclined sliding groove (301), and the other end of the inclined core (2) is fixedly provided with a T-shaped sliding block (7) slidingly fitted in the T-shaped inclined sliding groove (301).

9. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The front mold plate (1) is further provided with a front limiting block (8) and a rear limiting block (9) fixedly installed thereon, which are respectively arranged on the two sides of the sliding block (3) in the sliding direction, and used to stop the sliding block (3) to limit the movement stroke thereof.

10. The large angle large scale injection mold angle draft mechanism of claim 1, wherein: The included angle between the inclined core (2) and the sliding block (3) is 100°-140°.

Images