Dual color injection molding core pulling mechanism and dual color injection mold

Abstract

The utility model provides a kind of double-color injection molding core-pulling mechanism and double-color injection mold, double-color injection molding core-pulling mechanism includes rear insert block;Sliding block mechanism can slide relative to rear insert block, and the position of sliding mechanism and rear insert block contact is equipped with insert mechanism.The utility model is equipped with insert mechanism on sliding block mechanism and rear insert block, can ensure accurate positioning and stable movement of sliding block mechanism, help to improve the precision and reliability of core-pulling mechanism, in double-color injection molding process, it can prevent upwarping extrusion highlight surface.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology, specifically relating to a two-color injection molding core-pulling mechanism and a two-color injection mold. Background Technology

[0002] Typically, a two-tone high-gloss BC pillar mold for a standard product involves injecting ABS in the first injection and PMMA in the second. The mold structure is a double-layer slider structure. The upper layer is the weakest point of the slider, generally around 7mm, resulting in relatively weak strength. The sliders slide against each other, resulting in a certain gap during the actual fit. In the two-tone high-gloss injection molding process, the mold closes first, injecting the first material into the mold cavity, completing the first injection. In the second injection stage, the mold closes again, injecting the second material into the mold cavity, covering the material injected in the first injection. Due to product structure limitations, the slider steel cannot be thickened, and the strength of the upper slider cannot be increased. The molding pressure is relatively low during the first injection, so the slider structure does not deform. When the second color material is injected, the product flow length is long, and the injection pressure is high. Under the pressure of the second injection, the first color product and the corresponding slider structure deform. This slight structural deformation creates compressive stress. Since PMMA has a high-gloss surface, when the mold opens, the compressive stress is released, but the PMMA surface is still subjected to compressive stress, causing uneven lighting and fluctuations in the structural positions when the product is inspected under light.

[0003] During two-color injection molding, the sliding core reciprocates each time the mold opens and closes, allowing the recessed portion of the molded product to be easily removed from the mold.

[0004] In related technologies, structural deformation during the second injection molding process causes uneven light and shadow and fluctuations in the injection molded product. Utility Model Content

[0005] In view of this, the present invention provides a two-color injection molding core-pulling mechanism and a two-color injection mold to solve the problems existing in the prior art.

[0006] On the one hand, this utility model provides a two-color injection molding core-pulling mechanism, including a rear insert; a slider mechanism that can slide relative to the rear insert, and an insertion mechanism is provided at the position where the slider mechanism contacts the rear insert.

[0007] In one optional embodiment, the slider mechanism includes: a first slider; a driving mechanism connected to the first slider to drive the first slider to slide; and a second slider slidably connected to the first slider; wherein the insertion mechanism is disposed on the second slider and the rear insert.

[0008] In one optional embodiment, the insertion mechanism includes a protrusion structure and a groove structure, the protrusion structure being disposed on the second slider and the groove structure being disposed on the rear insert.

[0009] In one alternative embodiment, the second slider has a sliding surface that slides in conjunction with the first slider, and the protrusion structure is disposed close to the sliding surface.

[0010] In one alternative implementation, the protrusion structure is formed by extending laterally at an angle from the sliding surface away from the sliding surface.

[0011] In one alternative embodiment, the protruding structure forms a stepped surface with the corresponding side of the second slider, and the stepped surface is disposed opposite to the sliding surface.

[0012] In one alternative embodiment, the protrusion structure is integrally formed with the second slider.

[0013] In one alternative embodiment, the protruding structure is adapted to the shape of the groove structure and fits into each other.

[0014] On the other hand, this utility model also provides a two-color injection mold, including any one of the two-color injection core pulling mechanisms described in the present invention, wherein the insert of the two-color injection core pulling mechanism is disposed on the rear mold.

[0015] The beneficial effects of this utility model are as follows: by setting an insertion mechanism on the slider mechanism and the rear insert, the accurate positioning and stable movement of the slider mechanism can be ensured, which helps to improve the accuracy and reliability of the core pulling mechanism. In the two-color injection molding process, it can prevent the upward extrusion of the glossy surface. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a cross-sectional view of a two-color injection molding core-pulling mechanism according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the usage state of the two-color injection molding core-pulling mechanism according to another embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 110. First slider; 120. Second slider; 121. Sliding surface; 130. Rear insert; 131. Groove structure; 140. Insertion mechanism; 141. Stepped surface; 150. Drive mechanism; 160. Connecting block; 170. Pressure strip; 180. Hook. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] The following is combined Figure 1 and Figure 2 The following describes embodiments of the present invention.

[0026] like Figure 1 As shown, according to an embodiment of the utility model, a two-color injection molding core-pulling mechanism is provided, including: a rear insert 130; a slider mechanism that can slide relative to the rear insert 130, and an insertion mechanism 140 is provided at the position where the slider mechanism contacts the rear insert 130.

[0027] In this embodiment, the two-color injection molding core-pulling mechanism mainly includes a back insert 130 and a slider mechanism. The back insert 130 is used to form a part of the plastic part, such as a hole, groove, or other complex shape. The slider mechanism is the main component that performs the lateral core-pulling action. In two-color injection molding, the slider mechanism contacts the injected material to release the lateral undercut. The insertion mechanism 140 is a structure positioned at the contact point between the slider mechanism and the back insert 130. It ensures accurate positioning and stable movement of the slider mechanism, helps improve the accuracy and reliability of the core-pulling mechanism, and prevents upward warping and extrusion of the glossy surface during two-color injection molding.

[0028] Furthermore, the slider mechanism includes: a first slider 110; a driving mechanism 150 connected to the first slider 110 to drive the first slider 110 to slide; a second slider 120 slidably connected to the first slider 110; wherein, the insertion mechanism 140 is disposed on the second slider 120 and the rear insert 130.

[0029] The slider mechanism mainly includes a first slider 110, a drive mechanism 150, and a second slider 120. The first slider 110 is the main actuator in the slider mechanism, responsible for sliding along the guide rail when the mold opens to achieve lateral core pulling.

[0030] The drive mechanism 150 is the power source for the slider mechanism, providing the force required for the sliding of the first slider 110. The drive mechanism 150 can be a hydraulic cylinder, a pneumatic cylinder, or a motor, etc. The second slider 120 is a component slidably connected to the first slider 110, and can further transmit the sliding action of the first slider 110.

[0031] The insertion mechanism 140 is a structure provided on the second slider 120 and the rear insert 130 to ensure the precise engagement of the second slider 120 with the rear insert 130 during the sliding process.

[0032] Furthermore, the insertion mechanism 140 includes a protrusion structure and a groove structure 131. The protrusion structure is disposed on the second slider 120, and the groove structure 131 is disposed on the rear insert 130.

[0033] In this embodiment, a protruding structure is provided on the second slider 120. It is an outwardly protruding part that can cooperate with the groove structure 131 on the rear insert 130 during the mold opening and closing process. The main function of the protruding structure is to ensure the precise positioning and stable movement of the second slider 120 during the sliding process. The groove structure 131 is provided on the rear insert 130. It is an inwardly recessed part used to receive the protruding structure on the second slider 120. The main function of the groove structure 131 is to provide a stable sliding path for the protruding structure, ensuring that the second slider 120 can slide along a predetermined trajectory.

[0034] The insertion mechanism 140, through the precise cooperation of the protruding structure and the groove structure 131, achieves a stable connection and precise sliding between the second slider 120 and the rear insert 130. This insertion mechanism 140 plays a crucial role in the mold opening and closing process, ensuring not only that the lateral undercut of the plastic part can be correctly released, but also guaranteeing the precise operation of the mold and the high quality of the plastic part.

[0035] Furthermore, the second slider 120 has a sliding surface 121 that slides in conjunction with the first slider 110, and a protruding structure is disposed near the sliding surface 121.

[0036] The sliding surface 121 of the second slider 120 is the surface that contacts and slides with the first slider 110. The sliding surface 121 is a plane or a surface with a specific contour to ensure that the second slider 120 can slide smoothly along the guide rail of the first slider 110. The protruding structure is set close to the sliding surface 121 to ensure that the protruding structure can contact the groove structure 131 on the rear insert 130 in a timely manner when the second slider 120 slides.

[0037] Furthermore, a protruding structure is formed by extending laterally at an angle from the sliding surface 121 away from the sliding surface 121.

[0038] The protruding structure extends laterally at an angle from the sliding surface 121 toward the direction away from the sliding surface 121, so that the protruding structure can effectively cooperate with the groove structure 131 on the rear insert 130 when the second slider 120 slides.

[0039] The tilt angle needs to be determined according to the specific requirements of the mold and the shape of the plastic part to ensure that the protruding structure can smoothly insert into and exit the groove structure 131 during the mold opening and closing process.

[0040] The raised structure, in conjunction with the groove structure 131, helps to achieve stable sliding of the second slider 120 during the mold opening and closing process, reduces friction and wear during sliding, and improves the smoothness of sliding.

[0041] Furthermore, the protruding structure and the corresponding side of the second slider 120 form a stepped surface 141, which is arranged opposite to the sliding surface 121.

[0042] In this embodiment, the stepped surface 141 abuts against the inner wall of the groove structure 131. The stepped surface 141 enhances the structural stability of the second slider 120, preventing deformation or displacement during high pressure or repeated opening and closing, which helps to realize the lateral core-pulling action of the second slider 120, improves the durability and reliability of the mold, and extends the service life of the mold.

[0043] Furthermore, the protruding structure is integrally formed with the second slider 120. The integrally formed protruding structure has a more robust connection with the slider, which helps to improve the structural stability of the entire slider mechanism and reduce the risk of displacement or deformation during use.

[0044] The protruding structure and the groove structure 131 are adapted to each other in shape and fit together.

[0045] like Figure 2 As shown, in this utility model, the driving mechanism 150 is a hydraulic cylinder, which is connected to the first slider 110 through a connecting block 160. The hydraulic cylinder drives the first slider 110 to move to the right along the pressure bar 170.

[0046] At the same time, the movement of the first slider 110 drives the second slider 120 to move downward along the hook 180. After the hook 180 is disengaged, the second slider 120 and the first slider 110 move to the right together.

[0047] This utility model also proposes a two-color injection mold, including any one of the two-color injection core pulling mechanisms, wherein the insert of the two-color injection core pulling mechanism is disposed on the rear mold.

[0048] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation.

[0049] For those skilled in the art, various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the protection scope of this invention.

Claims

1. A two-color injection molding core-pulling mechanism, characterized in that, include: Post-installation insert; The slider mechanism can slide relative to the rear insert, and the position where the slider mechanism contacts the rear insert is provided with an insertion mechanism.

2. The dual-color injection molding core-pulling mechanism according to claim 1, characterized in that, The slider mechanism includes: First slider; A drive mechanism is connected to the first slider to drive the first slider to slide. The second slider is slidably connected to the first slider; The insertion mechanism is located on the second slider and the rear insert.

3. The dual-color injection molding core-pulling mechanism according to claim 2, characterized in that, The insertion mechanism includes a protrusion structure and a groove structure. The protrusion structure is disposed on the second slider, and the groove structure is disposed on the rear insert.

4. The dual-color injection molding core-pulling mechanism according to claim 3, characterized in that, The second slider has a sliding surface that slides in conjunction with the first slider, and the protrusion structure is disposed close to the sliding surface.

5. The dual-color injection molding core-pulling mechanism according to claim 4, characterized in that, The protrusion structure is formed by extending laterally at an angle from the sliding surface in a direction away from the sliding surface.

6. The dual-color injection molding core-pulling mechanism according to claim 4, characterized in that, The protruding structure forms a stepped surface with the corresponding side of the second slider, and the stepped surface is disposed opposite to the sliding surface.

7. The two-color injection molding core-pulling mechanism according to any one of claims 3 to 6, characterized in that, The protruding structure is integrally formed with the second slider.

8. The two-color injection molding core-pulling mechanism according to any one of claims 3 to 6, characterized in that, The protruding structure and the groove structure are adapted to each other in shape and fit together.

9. A two-color injection mold, characterized in that, The invention includes a two-color injection molding core-pulling mechanism as described in any one of claims 1 to 8, wherein the insert of the two-color injection molding core-pulling mechanism is disposed on the rear mold.

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