Shovel tilt column structure for two-color injection molding

Abstract

The utility model relates to the technical fields of injection mold, disclose a shovel inclined guide pillar structure for double -color injection molding, including movable template, fixed template, upper die, lower die, inclined guide pillar, line position block, shovel, the upper die is fixed in movable template, the lower die is fixed on fixed template, line position block abuts on the lower die, and the lower die and line position block and upper die cooperate and form the cavity, the inclined guide pillar is fixed in movable template, and line position block slides along the guide rail groove, and the upper portion of shovel is fixed in movable template, and shovel cooperates with line position block, through the connection relation and function division of each component, realize movable template and the collaborative action of fixed template, utilize the cooperation of shovel and inclined guide pillar to ensure that line position block is stable to separate when opening the mould, resets accurately when closing the mould, avoid the interference of line position block and one injection product when secondary injection from structure, improve product pass rate and production stability.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molds, and more specifically, to a shovel inclined guide post structure for two-color injection molding. Background Technology

[0002] In two-shot molding processes such as two-color injection molding, scraping of the slide is a common technical challenge. In existing technologies, slide repositioning mainly relies on inclined guide pillars, which, due to machining tolerances and long-term wear, easily leads to incomplete slide repositioning. During the second mold closing, the scraper impacts the first-shot molded material (the first-shot product) (i.e., scraping), which not only affects product quality (such as surface scratches and dimensional deviations) but also reduces production efficiency and increases mold maintenance costs. Currently, there is a lack of targeted structural designs to solve this problem. Utility Model Content

[0003] The purpose of this invention is to provide a shovel inclined guide post structure for two-color injection molding, which aims to solve the problem of scraping defects caused by incomplete repositioning of the slide in two-color injection molding in the prior art.

[0004] This utility model discloses a shovel-type inclined guide post structure for two-color injection molding, comprising a movable template, a fixed template, an upper mold core, a lower mold core, an inclined guide post, a sliding block, and a shovel. The movable template and the fixed template are arranged vertically and alternately. The upper mold core is fixed in the movable template and moves with the mold opening and closing action. The lower mold core is fixed on the fixed template, and the sliding block abuts against the lower mold core. The lower mold core, the sliding block, and the upper mold core cooperate to form a cavity. The inclined guide post is inclined and fixed in the movable template to guide the movement of the sliding block to disengage from the product's lateral undercut. The sliding block slides along the guide rail groove to form the lateral structure of the product. The upper part of the shovel is fixed in the movable template, and the shovel cooperates with the sliding block to assist in the pre-reset and locking of the sliding block.

[0005] Furthermore, the shovel and the forming cavity are arranged at a relative interval.

[0006] Furthermore, the row block is provided with an inclined guide groove for the lower part of the inclined guide post to be inserted.

[0007] Furthermore, when the mold is closed, and the lower part of the inclined guide post is inserted into the inclined guide groove of the slide block, the outer side wall of the inclined guide post and the inner side wall of the inclined guide groove are spaced apart.

[0008] Furthermore, the bottom of the shovel is vertically abutted against one side of the sliding block.

[0009] Furthermore, the shovel includes a shovel block, the lower part of which is exposed in the guide rail groove. The lower part of the shovel block is provided with a wedge surface that cooperates with the sliding block, and one side of the sliding block is provided with a chamfered surface that abuts against the wedge surface.

[0010] Furthermore, the inclination angle of the wedge surface is adapted to the inclination angle of the inclined guide post.

[0011] Furthermore, the wedge surface and the inclined guide post are arranged at relative intervals.

[0012] Furthermore, it also includes a guide block, which is fixed on the fixed template. One side of the guide block abuts against the outer side of the lower mold core, and the top of the guide block is recessed downward to form the guide groove. The sliding block abuts against the guide groove.

[0013] Furthermore, the guide rail groove extends laterally through the guide block, and a limit pin is provided in the guide rail groove. The limit pin and the moving block are arranged horizontally relative to each other.

[0014] Compared with the prior art, the shovel inclined guide column structure for two-color injection molding provided by this utility model, by clarifying the connection relationship and functional division of each component, realizes the coordinated action of the movable template and the fixed template. The cooperation between the shovel and the inclined guide column ensures that the slide block stably disengages when the mold is opened and accurately resets when the mold is closed. Structurally, it avoids interference (shoveling) between the slide block and the first injection product during secondary injection, thereby improving the product qualification rate and production stability. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the mold provided by this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the mold provided by this utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the shovel provided by this utility model;

[0018] Figure 4 This is a three-dimensional schematic diagram of the guide block and the limiting pin provided by this utility model;

[0019] Figure 5 This is a three-dimensional schematic diagram of the shovel inclined guide column structure for two-color injection molding provided by this utility model.

[0020] In the diagram: movable template 10, fixed template 20, upper mold core 30, lower mold core 40, inclined guide post 50, sliding block 60, shovel 70, guide block 80, forming cavity 90, inclined guide groove 61, inclined cut surface 62, shovel block 71, wedge surface 72, guide rail groove 81, limit pin 82. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0025] The shovel 70 and inclined guide post 50 structure for two-color injection molding includes a movable template 10, a fixed template 20, an upper mold core 30, a lower mold core 40, an inclined guide post 50, a sliding block 60, and a shovel 70. The movable template 10 and the fixed template 20 are arranged vertically and alternately. The upper mold core 30 is fixed in the movable template 10 and moves with the mold opening and closing action. The lower mold core 40 is fixed on the fixed template 20, and the sliding block 60 abuts against the lower mold core 40. The lower mold core 40, the sliding block 60, and the upper mold core 30 cooperate to form a cavity 90. The inclined guide post 50 is inclined and fixed in the movable template 10 to guide the movement of the sliding block 60 to disengage from the product's lateral undercut. The sliding block 60 slides along the guide rail groove 81 to form the lateral structure of the product. The upper part of the shovel 70 is fixed in the movable template 10. The shovel 70 cooperates with the sliding block 60 to assist in the pre-reset and locking of the sliding block 60.

[0026] The aforementioned shovel 70 and inclined guide post 50 structure for two-color injection molding, by clearly defining the connection relationship and functional division of each component, enables the coordinated action of the movable template 10 and the fixed template 20. The cooperation between the shovel 70 and the inclined guide post 50 ensures that the slide block 60 stably disengages during mold opening and accurately resets during mold closing. Structurally, this avoids interference (scraping) between the slide block 60 and the first injection product during secondary injection molding, thereby improving product qualification rate and production stability.

[0027] In this embodiment, the shovel 70 and the forming cavity 90 are arranged at a relative interval.

[0028] The gap between the scraper 70 and the molding cavity 90 can prevent the scraper 70 from directly contacting the colloid inside the cavity during movement (especially for single-shot products), and prevent the colloid from being scratched or deformed due to the positional deviation of the scraper 70, thus ensuring the surface quality of the product.

[0029] In this embodiment, the row block 60 is provided with an inclined guide groove 61 for the lower part of the inclined guide post 50 to be inserted.

[0030] The inclined guide groove 61 and the inclined guide post 50 cooperate to form a precise guiding structure, which can convert the inclined movement of the inclined guide post 50 into the lateral sliding of the sliding block 60, ensuring that the sliding block 60 moves stably along the preset trajectory, improving the lateral forming accuracy, and avoiding forming defects at the undercut of the product due to movement deviation.

[0031] In this embodiment, when the mold is closed, the lower part of the inclined guide post 50 is inserted into the inclined guide groove 61 of the slide block 60, and the outer side wall of the inclined guide post 50 and the inner side wall of the inclined guide groove 61 are arranged at intervals.

[0032] When the mold is closed, the inclined guide post 50 and the inclined guide groove 61 maintain a gap, which can accommodate machining tolerances or assembly errors, avoid rigid contact between the two to prevent wear or jamming, ensure a smooth mold closing process, reduce component wear, and extend the service life of the mold. Furthermore, because of the gap, when the mold is opened, the inclined guide post 50 can first have room to retreat, protecting the product from scraping off the glue, and then the inclined guide post 50 can drive the slide block 60 to disengage from the undercut.

[0033] In this embodiment, the bottom of the shovel 70 is vertically abutted against one side of the sliding block 60.

[0034] The bottom of the shovel 70 is vertically abutted against the slide block 60, which makes the pushing direction of the shovel 70 on the slide block 60 more stable, ensuring that the slide block 60 is subjected to uniform force during pre-reset, avoiding the slide block 60 from getting stuck or not resetting properly due to force deviation, and further reducing the risk of scraping the glue.

[0035] In this embodiment, the shovel 70 includes a shovel block 71, the lower part of which is exposed in the guide rail groove 81. The lower part of the shovel block 71 is provided with a wedge surface 72 that cooperates with the sliding block 60. The sliding block 60 is provided with a chamfered surface 62 that abuts against the wedge surface 72 on one side.

[0036] The combination of wedge surface 72 and inclined surface 62 increases the contact area between the shovel 70 and the slide block 60, so that the locking force is transmitted to the slide block 60 more evenly, improving the locking effect when the mold is closed, preventing the slide block 60 from moving backward under the action of injection pressure, and ensuring the molding accuracy of the product's lateral structure.

[0037] In this embodiment, the tilt angle of the wedge surface 72 is matched with the tilt angle of the inclined guide post 50.

[0038] The wedge angle 72 is matched with the angle of the inclined guide post 50, which can coordinate the locking force of the shovel 70 and the guiding force of the inclined guide post 50, avoid the mutual stress between the two, and ensure that the slide block 60 can be accurately guided and stably locked when the mold is closed, thus improving the consistency of the structural action.

[0039] In this embodiment, the wedge surface 72 and the inclined guide post 50 are arranged at relative intervals.

[0040] The wedge surface 72 and the inclined guide post 50 are kept apart to prevent interference or friction between them during movement, avoid component wear, and at the same time ensure the independence of the operation of the loader 70 and the inclined guide post 50, thereby improving the stability of the structure.

[0041] In this embodiment, a guide block 80 is also included. The guide block 80 is fixed on the fixed template 20. One side of the guide block 80 abuts against the outer side of the lower mold core 40. The top of the guide block 80 is recessed downward to form a guide groove 81, and the sliding block 60 abuts against the guide groove 81.

[0042] The guide block 80 provides a precise sliding track for the slide block 60 through the guide groove 81, restricting the movement direction of the slide block 60 and preventing it from deviating during sliding. At the same time, the guide block 80 abuts against the lower mold core 40, which can enhance the fixing stability of the lower mold core 40 and improve the rigidity of the overall structure.

[0043] In this embodiment, the guide rail groove 81 extends laterally through the guide block 80, and a limit pin 82 is provided in the guide rail groove 81. The limit pin 82 and the moving block 60 are arranged horizontally relative to each other.

[0044] The limiting pin 82 can limit the maximum sliding distance of the slide block 60 in the guide groove 81, prevent the slide block 60 from leaving the guide groove 81 or colliding with other parts due to excessive mold opening, play a protective role, ensure that the movement range of the slide block 60 is controllable, and improve structural safety.

[0045] The overall technical effects are as follows:

[0046] 1. Through the coordinated action of the shovel 70 and the inclined guide post 50, the slide block 60 is pre-reset and precisely locked, effectively avoiding the scraping phenomenon during the second shot molding, and the scraping defect rate can be reduced by more than 95%.

[0047] 2. The spacing design of each component (such as the shovel 70 and the cavity, the inclined guide post 50 and the guide groove, and the wedge surface 72 and the inclined guide post 50) reduces rigid contact and wear, extending the mold life by more than 40%.

[0048] 3. The angle matching between the wedge surface 72 and the oblique cut surface 62, as well as the guiding function of the guide rail groove 81, improve the stability and accuracy of the movement of the sliding block 60, and ensure the forming quality of the product's lateral structure.

[0049] 4. Protective structures such as limit pin 82 reduce the risk of component collisions and improve the safety and reliability of mold operation.

[0050] The working process of this utility model is explained in conjunction with structural details:

[0051] During the mold opening stage: the movable template 10 drives the upper mold core 30, the inclined guide post 50 and the shovel 70 to move upward. The shovel 70 first disengages from the slide block 60, and the inclined guide post 50 slides along the inclined guide groove 61 of the slide block 60, driving the slide block 60 to slide outward along the guide rail groove 81 of the guide block 80, disengaging from the side undercut of the first injection product; the limiting pin 82 limits the maximum sliding distance of the slide block 60 to prevent it from deviating from the track.

[0052] Mold closing stage: The movable template 10 drives each component to move downward. The shovel 70 first engages with the inclined cut surface 62 of the slide block 60 through the wedge surface 72 to push the slide block 60 to pre-reset, so that it is close to the first injection product. Then the inclined guide post 50 is inserted into the inclined guide groove 61 to guide the slide block 60 to accurately reset. The wedge surface 72 of the shovel block 71 locks the slide block 60 to ensure that there is no interference with the colloid after the molding cavity 90 is closed, thus completing the second injection molding.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shovel guide post structure for two-color injection molding, characterized in that, The mold includes a movable template, a fixed template, an upper mold core, a lower mold core, inclined guide pillars, sliding blocks, and a shovel. The movable and fixed templates are arranged vertically and alternately. The upper mold core is fixed in the movable template and moves with the mold opening and closing action. The lower mold core is fixed on the fixed template, and the sliding block abuts against the lower mold core. The lower mold core, sliding block, and upper mold core cooperate to form a cavity. The inclined guide pillar is inclined and fixed in the movable template to guide the movement of the sliding block to disengage from the product's lateral undercut. The sliding block slides along the guide rail groove to form the product's lateral structure. The upper part of the shovel is fixed in the movable template, and the shovel cooperates with the sliding block to assist in the pre-reset and locking of the sliding block.

2. The forklift inclined guide post structure for two-color injection molding as described in claim 1, characterized in that, The shovel and the forming cavity are arranged at relative intervals.

3. The forklift inclined guide post structure for two-color injection molding as described in claim 2, characterized in that, The positioning block has an inclined guide groove for the lower part of the inclined guide post to be inserted.

4. The forklift inclined guide post structure for two-color injection molding as described in claim 3, characterized in that, When the mold is closed, the lower part of the inclined guide post is inserted into the inclined guide groove of the slide block, and the outer side wall of the inclined guide post is spaced apart from the inner side wall of the inclined guide groove.

5. The forklift inclined guide post structure for two-color injection molding as described in claim 4, characterized in that, The bottom of the shovel is vertically abutted against one side of the sliding block.

6. The forklift inclined guide post structure for two-color injection molding as described in claim 5, characterized in that, The shovel includes a shovel block, the lower part of which is exposed in the guide rail groove. The lower part of the shovel block is provided with a wedge surface that cooperates with the sliding block. One side of the sliding block is provided with a beveled surface that abuts against the wedge surface.

7. The forklift inclined guide post structure for two-color injection molding as described in claim 6, characterized in that, The inclination angle of the wedge surface is matched with the inclination angle of the inclined guide post.

8. The forklift inclined guide post structure for two-color injection molding as described in claim 7, characterized in that, The wedge surfaces and the inclined guide posts are arranged at relative intervals.

9. The forklift inclined guide post structure for two-color injection molding as described in any one of claims 1 to 8, characterized in that, It also includes a guide block, which is fixed to the fixed template. One side of the guide block abuts against the outer side of the lower mold core, and the top of the guide block is recessed downward to form the guide groove. The sliding block abuts against the guide groove.

10. The forklift inclined guide post structure for two-color injection molding as described in claim 9, characterized in that, The guide rail groove extends laterally through the guide block, and a limit pin is provided in the guide rail groove. The limit pin and the moving block are arranged horizontally relative to each other.

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