Secondary ejection mechanism of injection molding mold for industrial control shell with boss

Abstract

The utility model provides a kind of secondary ejection mechanism of protrusion industrial control shell injection molding mould, belong to mould technical field.It includes upper die plate and lower die plate, the upper die plate and lower die plate are separately provided with upper forming insert and lower forming insert, the upper forming insert and lower forming insert between being provided with forming cavity, the upper forming insert be provided with a subsidence plane and a convex plane, the upper forming insert bottom and the subsidence plane and convex plane on lower forming insert are adapted. Through setting secondary ejection mechanism, the cooperation of gas demoulding structure and ejector rod ejection assembly is combined, the stepped ejection of protrusion industrial control shell is realized;Meanwhile, side through-hole forming mechanism ensures the accuracy of side through-hole forming, and side through-hole forming mechanism can automatically core-pulling, the above design effectively avoids the problem of uneven stress of product caused by single ejection mode, reduces the damage of product ejection, improves product forming quality.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a secondary ejection mechanism for an injection molding mold with a boss-shaped industrial control housing. Background Technology

[0002] In the field of industrial control equipment, industrial control housings with bosses are core components that need to be manufactured through injection molding. Their structure combines flat areas with raised bosses, and some housings also require reserved side mounting holes, placing stringent requirements on molding precision and surface quality. In existing technologies, the ejection mechanism of injection molding molds for industrial control housings with bosses mostly adopts a single mechanical ejection method, such as a fixed ejector rod directly pushing the product. Due to the height difference between the boss and the flat surface of the industrial control housing, a single ejection mechanism is difficult to achieve uniform force distribution: if the ejector rod acts on the flat area, the boss part is prone to sticking to the mold insert due to the large adhesion force, resulting in local overload of the product during ejection, causing damage such as boss breakage and scratches on the housing surface; if the ejector rod acts on the boss part, the boss is prone to deformation and detachment due to the limited load-bearing capacity of the boss, which cannot meet the structural strength requirements of the industrial control housing. In addition, some industrial control housings with side holes lack coordinated design between the side hole forming structure and the ejection mechanism. The separation of the side hole forming part and the product ejection action are not smoothly connected, which can easily cause secondary scratches on the side of the product during ejection, resulting in burrs and cracks on the edge of the side hole, which seriously affects the product qualification rate and increases production costs and rework cycle.

[0003] For example, a Chinese patent discloses a U-shaped submarine gate structure for an industrial control box housing mold [Application No.: 202420131468.3], including a lower injection mold and an upper injection mold for the industrial control box housing. In this invention, during the injection molding process, the lower and upper injection molds of the industrial control box housing are brought close together, allowing the lower insert and upper insert of the industrial control box housing to abut against each other. Simultaneously, a combined auxiliary molding component and a head auxiliary molding part are used to synchronously form the side molding space of the normal cavity. Molten material is injected through two injection slots into the cavity. The molten material enters the side space of the cavity through the U-shaped submarine gate space and the straight gate space, ensuring the uniformity of the plastic part around its perimeter during injection molding, reducing porosity and streaks around the plastic part, and improving the quality of the plastic part. Summary of the Invention

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a secondary ejection mechanism for injection molding molds with a boss-shaped industrial control housing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A secondary ejection mechanism for an injection molding die with a boss-shaped industrial control housing includes an upper mold plate and a lower mold plate. An upper molding insert and a lower molding insert are respectively provided on the upper and lower mold plates, and a molding cavity is provided between the upper and lower molding inserts. The upper molding insert has a recessed plane and a raised plane, and the bottom of the upper molding insert is adapted to the recessed plane and raised plane on the lower molding insert. A secondary ejection mechanism is also provided on the lower side of the lower mold plate. The secondary ejection mechanism includes an air-pump demolding structure and an ejector pin assembly. Side through-hole molding mechanisms are also provided on the four side walls of the molding cavity.

[0006] In the above-mentioned secondary ejection mechanism of the injection molding mold with boss industrial control housing, the air ejector demolding structure includes two vertical air ejector channels respectively set at the sunken plane and the raised plane. The bottom end of the vertical air ejector channel vertically penetrates the lower molding insert and is connected to the air inlet channel set on the lower template.

[0007] In the above-mentioned secondary ejection mechanism of the injection molding mold with boss industrial control housing, a valve mounting groove is provided at the top of the vertical air jet channel, and a valve component is provided in the valve mounting groove.

[0008] In the above-mentioned secondary ejection mechanism of the injection molding mold with boss industrial control housing, the ejector rod ejection assembly includes a top plate disposed on the lower side of the lower template. Several straight ejector rods are fixedly connected to the top plate. The top of the straight ejector rods vertically penetrates the lower template and the lower molding insert and is connected to the molding cavity.

[0009] In the above-mentioned secondary ejection mechanism of the injection molding mold for industrial control housing with boss, the side through hole forming mechanism includes a translation seat slidably disposed on the lower template. The inner end of the translation seat is provided with a through hole forming block mounting part that is inserted into the connection between the upper forming insert and the lower forming insert and connected to the side of the forming cavity. The inner end of the through hole forming block mounting part is provided with a through hole forming block that is inserted into the forming cavity. The mechanism also includes a translation seat driving structure disposed on the upper template.

[0010] In the above-mentioned secondary ejection mechanism of the injection molding mold for industrial control housing with boss, the translation seat, the through hole forming block mounting part and the through hole forming block are integrally formed.

[0011] In the above-mentioned secondary ejection mechanism of the injection molding mold with boss industrial control housing, the translation seat drive structure includes a drive rod that is tilted and fixed at the bottom of the upper template. The drive rod is inserted into the translation seat and slidably connected to the translation seat.

[0012] In the above-mentioned secondary ejection mechanism of the injection molding mold with protrusion for industrial control housing, the translation seat is also provided with limiting pressure plates on both sides, the bottom of the translation seat is also provided with a limiting slide groove, and the lower template is fixed with a limiting slider inserted into the limiting slide groove.

[0013] In the above-mentioned secondary ejection mechanism of the injection molding mold with boss industrial control housing, the upper molding insert and the lower molding insert are respectively provided with upper cooling channel and lower cooling channel.

[0014] In the above-mentioned secondary ejection mechanism of the injection molding mold with boss for industrial control housing, the upper molding insert is detachably fixed to the upper template by a number of screws, and the lower molding insert is detachably fixed to the lower template by a number of screws.

[0015] Compared with existing technologies, the advantages of this utility model are: 1. By setting up a secondary ejection mechanism, combined with the air ejection structure and the ejector pin assembly, the step-by-step ejection of the industrial control housing with bosses can be achieved; at the same time, the side through hole forming mechanism ensures the accuracy of the side through hole forming, and the side through hole forming mechanism can automatically pull the core. The above design effectively avoids the problem of uneven product force caused by a single ejection method, reduces product damage during ejection, and improves product forming quality.

[0016] 2. The air ejector demolding structure adopts two vertical air ejector channels located on the sunken plane and the raised plane respectively, which are connected to the air inlet channel. This design allows the gas to act precisely on different planar areas of the product, and achieves initial demolding through gas pressure. This avoids the direct impact on the product surface caused by traditional mechanical ejection, reduces scratches and deformation on the product surface, and improves the smoothness of demolding.

[0017] 3. The ejector pin assembly achieves secondary ejection by driving the straight ejector pin through the top plate. The straight ejector pin acts precisely on the molding cavity. This structure further ejects the product completely after the initial demolding by the air ejector, solving the problem of incomplete ejection that may exist with a single air ejector. This makes the separation of the product from the mold smoother and reduces product damage caused by adhesion.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a structural diagram of the lower template; Figure 4This is a partial structural diagram of the lower mold when the product has not been demolded. Detailed Implementation

[0020] like Figures 1-4 As shown, a secondary ejection mechanism for an injection molding die with a boss-shaped industrial control housing includes an upper mold plate 1 and a lower mold plate 2. An upper molding insert 3 and a lower molding insert 4 are respectively provided on the upper mold plate 1 and the lower mold plate 2. A molding cavity 5 is provided between the upper molding insert 3 and the lower molding insert 4. A recessed plane 6 and a raised plane 7 are provided on the upper molding insert 3. The bottom of the upper molding insert 3 is adapted to the recessed plane 6 and the raised plane 7 on the lower molding insert 4. A secondary ejection mechanism is also provided on the lower side of the lower mold plate 2. The secondary ejection mechanism includes an air ejector demolding structure 8 and an ejector pin assembly 9. Side through-hole molding mechanisms 10 are also provided on the four side walls of the molding cavity 5.

[0021] In this invention, by setting a secondary ejection mechanism, combined with the air ejection structure and the ejector pin assembly, the step-by-step ejection of the industrial control housing with bosses is achieved; at the same time, the side through hole forming mechanism ensures the accuracy of the side through hole forming, and the side through hole forming mechanism can automatically pull the core. The above design effectively avoids the problem of uneven product force caused by a single ejection method, reduces product damage during ejection, and improves product forming quality.

[0022] Specifically, the air-ejection demolding structure 8 includes two vertical air-ejection channels 11 respectively located at the sunken plane 6 and the raised plane 7. The bottom end of each vertical air-ejection channel 11 vertically penetrates the lower molding insert 4 and connects to the air inlet channel 12 located on the lower mold plate 2. The air-ejection demolding structure employs two vertical air-ejection channels located at the sunken plane and the raised plane respectively, connected to the air inlet channel. This design allows the gas to act precisely on different planar areas of the product, achieving initial demolding through gas pressure. This avoids the direct impact on the product surface caused by traditional mechanical ejection, reduces surface scratches and deformation, and improves the smoothness of demolding.

[0023] Specifically, a valve mounting groove 13 is provided at the top of the vertical air ejector channel 11, and a valve component 14 is installed in the valve mounting groove 13. The valve mounting groove and the built-in valve component at the top of the vertical air ejector channel can effectively control the flow and pressure of gas. This design avoids the problem of insufficient demolding force caused by gas leakage, ensures the precise and controllable demolding action of the air ejector, and prevents molten material from entering the channel during injection molding, thus ensuring the stability and service life of the air ejector structure.

[0024] Specifically, the ejector pin assembly 9 includes a top plate 15 disposed on the lower side of the lower mold plate 2. Several straight ejector pins 16 are fixedly connected to the top plate 15. The top ends of the straight ejector pins 16 vertically penetrate the lower mold plate 2 and the lower forming insert 4, and are connected to the forming cavity 5. The ejector pin assembly achieves secondary ejection by driving the straight ejector pins through the top plate, with the straight ejector pins precisely acting on the forming cavity. This structure further completely ejects the product after the initial demolding by air ejection, solving the problem of incomplete ejection that may exist with a single air ejector, making the separation of the product from the mold smoother and reducing product damage caused by adhesion.

[0025] Specifically, the side through-hole forming mechanism 10 includes a translation seat 17 slidably disposed on the lower template 2. The inner end of the translation seat 17 protrudes to form a through-hole forming block mounting part 18, which is inserted into the connection between the upper forming insert 3 and the lower forming insert 4 and connected to the side of the forming cavity 5. The inner end of the through-hole forming block mounting part 18 protrudes to form a through-hole forming block 19 inserted into the forming cavity 5. The mechanism also includes a translation seat driving structure disposed on the upper template 1. The side through-hole forming mechanism drives the through-hole forming block in and out of the forming cavity via the translation seat, and the translation seat driving structure enables automated operation. This design solves the problems of complex traditional side hole forming structures and difficult demolding, ensuring accurate side through-hole forming while avoiding rigid pulling between the forming block and the product, reducing damage to the side of the product.

[0026] Specifically, the translation seat 17, the through-hole forming block mounting part 18, and the through-hole forming block 19 are integrally formed. This integral forming enhances the overall rigidity and structural stability of the side through-hole forming mechanism. This design avoids forming errors caused by assembly gaps, ensures the dimensional accuracy of the through-hole, reduces the impact of component loosening on product forming quality, and extends the service life of the mechanism.

[0027] Specifically, the translation seat drive structure includes a drive rod 20 that is tilted and fixed to the bottom of the upper template 1. The drive rod 20 is inserted into the translation seat 17 and slidably connected to the translation seat 17. The translation seat drive structure uses an inclined drive rod slidably connected to the translation seat, and utilizes the opening and closing motion of the upper template to drive the horizontal movement of the translation seat. This design enables automatic entry and exit of the side through-hole forming block without the need for an additional power source, simplifies the mold structure, and ensures the synchronization and stability of the drive, thereby improving production efficiency.

[0028] Specifically, the translation seat 17 is further provided with limiting pressure plates 24 on both sides, and the bottom of the translation seat 17 is also provided with a limiting slide groove. A limiting slider 21 inserted into the limiting slide groove is fixed on the lower template 2. The limiting pressure plates on both sides of the translation seat cooperate with the limiting slider and limiting slide groove at the bottom to form a bidirectional limiting guide structure. This design ensures the accurate movement trajectory of the translation seat, avoids the positional deviation of the through hole forming block caused by lateral deviation, ensures the forming accuracy of the side through hole, and at the same time reduces component wear and extends the service life of the mechanism.

[0029] Specifically, the upper molding insert 3 and the lower molding insert 4 are respectively provided with an upper cooling channel 22 and a lower cooling channel 23. The upper and lower cooling channels in the upper and lower molding inserts can quickly and evenly cool the molding cavity. This design solves the problem of product shrinkage and deformation caused by uneven cooling in traditional methods, accelerates product curing speed, improves production efficiency, and ensures product dimensional stability.

[0030] Specifically, the upper molding insert 3 is detachably fixed to the upper template 1 by several screws, and the lower molding insert 4 is detachably fixed to the lower template 2 by several screws. The detachable fixing of the upper and lower molding inserts with screws facilitates replacement according to different specifications of industrial control housings with bosses. This design solves the problem of poor mold versatility caused by the non-removable fixing of traditional inserts, reduces mold replacement costs, shortens product changeover cycles, and expands the applicability of the mold.

[0031] The working principle of this utility model is as follows: by setting a secondary ejection mechanism, combined with the air ejection demolding structure and the ejector pin assembly, the step-by-step ejection of the industrial control housing with bosses is realized; at the same time, the side through hole forming mechanism ensures the accuracy of the side through hole forming, and the side through hole forming mechanism can automatically pull the core. The above design effectively avoids the problem of uneven product force caused by a single ejection method, reduces product damage during ejection, and improves product forming quality. The air-jacking demolding structure employs two vertical air-jacking channels located on the sunken and raised planes, respectively, connected to the inlet air channel. This design allows gas to precisely act on different planar areas of the product, achieving initial demolding through gas pressure. This avoids the direct impact on the product surface caused by traditional mechanical ejection, reducing surface scratches and deformation, and improving demolding stability. The valve mounting slots and built-in valves at the top of the vertical air-jacking channels effectively control the gas flow and pressure, preventing insufficient demolding force due to gas leakage. This ensures precise and controllable air-jacking demolding and prevents molten material from entering the channels during injection, guaranteeing the stability and lifespan of the air-jacking structure. The ejector pin assembly uses a top plate to drive a straight ejector pin for secondary ejection, with the straight ejector pin precisely acting on the molding cavity. This structure further ejects the product completely after the initial air-jacking demolding, solving the problem of incomplete ejection that may occur with a single air-jacking system. This results in smoother separation of the product from the mold and reduces product damage caused by adhesion. The side through-hole forming mechanism uses a translation seat to drive the through-hole forming block into and out of the forming cavity. With the help of the translation seat drive structure, it realizes automated operation. This design solves the problems of complexity and demolding difficulty of traditional side hole forming structures, ensuring accurate side through-hole forming, while avoiding hard pulling between the forming block and the product, reducing damage to the side of the product. The translation seat drive structure adopts an inclined drive rod that is slidably connected to the translation seat. The opening and closing motion of the upper template drives the horizontal movement of the translation seat. The limiting pressure plates on both sides of the translation seat cooperate with the limiting slider and limiting groove at the bottom to form a two-way limiting guide structure. This design ensures accurate movement trajectory of the translation seat, avoids positional deviation of the through-hole forming block caused by lateral deviation, ensures the forming accuracy of the side through-hole, and reduces component wear, extending the service life of the mechanism. The upper and lower cooling channels within the upper and lower molding inserts can quickly and evenly cool the molding cavity. The upper and lower molding inserts are detachably fixed with screws, making it easy to replace them according to different specifications of industrial control housings with bosses.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A secondary ejection mechanism for an injection mold with a boss-shaped industrial control housing, comprising an upper template (1) and a lower template (2), characterized in that, The upper template (1) and the lower template (2) are respectively provided with an upper molding insert (3) and a lower molding insert (4). A molding cavity (5) is provided between the upper molding insert (3) and the lower molding insert (4). The upper molding insert (3) is provided with a sunken plane (6) and a raised plane (7). The bottom of the upper molding insert (3) is adapted to the sunken plane (6) and the raised plane (7) on the lower molding insert (4). The lower template (2) is also provided with a secondary ejection mechanism. The secondary ejection mechanism includes an air ejection demolding structure (8) and an ejector rod ejection assembly (9). The four side walls of the molding cavity (5) are also provided with side through hole molding mechanisms (10).

2. The secondary ejection mechanism of the injection molding die with boss for industrial control housing according to claim 1, characterized in that, The air ejector demolding structure (8) includes two vertical air ejector channels (11) respectively located on the sunken plane (6) and the raised plane (7). The bottom end of the vertical air ejector channel (11) vertically penetrates the lower molding insert (4) and is connected to the air inlet channel (12) located on the lower template (2).

3. The secondary ejection mechanism for injection molding molds with bosses for industrial control housings according to claim 2, characterized in that, The top of the vertical air top channel (11) is provided with a valve mounting groove (13), and a valve component (14) is provided in the valve mounting groove (13).

4. The secondary ejection mechanism for injection molding molds with bosses for industrial control housings according to claim 3, characterized in that, The ejector assembly (9) includes a top plate (15) located on the lower side of the lower template (2). Several straight ejector rods (16) are fixedly connected to the top plate (15). The top of the straight ejector rods (16) vertically penetrates the lower template (2) and the lower forming insert (4) and the top is connected to the forming cavity (5).

5. The secondary ejection mechanism for injection molding molds with bosses for industrial control housings according to claim 1, characterized in that, The side through hole forming mechanism (10) includes a translation seat (17) slidably disposed on the lower template (2), the inner end of the translation seat (17) being provided with a through hole forming block mounting part (18) inserted into the connection between the upper forming insert (3) and the lower forming insert (4) and connected to the side of the forming cavity (5), the inner end of the through hole forming block mounting part (18) being provided with a through hole forming block (19) inserted into the forming cavity (5), and also includes a translation seat driving structure disposed on the upper template (1).

6. The secondary ejection mechanism for an injection mold with a boss-shaped industrial control housing according to claim 5, characterized in that, The translation seat (17), the through hole forming block mounting part (18), and the through hole forming block (19) are integrally formed.

7. The secondary ejection mechanism for injection molding molds with bosses for industrial control housings according to claim 5, characterized in that, The translation seat drive structure includes a drive rod (20) that is tilted and fixed at the bottom of the upper template (1). The drive rod (20) is inserted into the translation seat (17) and slidably connected to the translation seat (17).

8. The secondary ejection mechanism for injection molding molds with bosses for industrial control housings according to claim 5, characterized in that, The translation seat (17) is also provided with limiting pressure plates (24) on both sides, and the bottom of the translation seat (17) is also provided with a limiting slide groove. The lower template (2) is fixed with a limiting slider (21) inserted into the limiting slide groove.

9. The secondary ejection mechanism for injection molding molds with bosses for industrial control housings according to claim 1, characterized in that, The upper molding insert (3) and the lower molding insert (4) are respectively provided with an upper cooling channel (22) and a lower cooling channel (23).

10. The secondary ejection mechanism of the injection molding die with boss for industrial control housing according to claim 1, characterized in that, The upper molding insert (3) is detachably fixed to the upper template (1) by a number of screws, and the lower molding insert (4) is detachably fixed to the lower template (2) by a number of screws.

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