A plastic injection molding device facilitating demolding

Abstract

This utility model discloses a plastic injection molding device that facilitates demolding, relating to the field of injection molds. It includes a mounting base, with a fixed plate vertically fixed to one end of the top of the mounting base. A first mounting plate is slidably mounted on one side of the fixed plate, and a second mounting plate is fixed to the other end of the top of the mounting base. A front mold frame is bolted to the other end of the first mounting plate, and a rear mold frame is bolted to the side of the second mounting plate near the front mold frame. A front molding plate is provided at the mold-closing end of the front mold frame, and a rear molding plate is provided at the mold-closing end of the rear mold frame. Pop-out components are provided at the bottom of the interior of both the front and rear molding plates. A liquid supply component is provided on one side of the top of the mounting base. This utility model is a plastic injection molding device that facilitates demolding by easily assembling and disassembling the front and rear mold frames, ensuring stable mold closure, and enabling cooling and demolding.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of injection molds, specifically a plastic injection molding device that facilitates demolding. Background Technology

[0002] Plastic injection molding equipment is the core equipment for processing plastic raw materials into products of specific shapes. Its function is to melt solid plastic raw materials into a fluid state through a heating system, and then apply high pressure by a screw or plunger to quickly inject the molten plastic into a closed mold cavity. After cooling and solidification, the mold opens and ejects the molded product. This equipment can achieve high-precision and high-efficiency mass production. However, existing plastic injection molding equipment is prone to damage when demolding because the plastic parts are hot and viscous and easily stick to the inner wall of the mold cavity.

[0003] According to application number 202420615528.9, an injection molding device for easy demolding is provided, including a frame, a mold, a water cooling mechanism and an air cooling mechanism connected to the frame. The mold includes a first module and a second module arranged vertically and symmetrically. The water cooling mechanism is connected to the interior of the first module. The first module is connected to a plurality of demolding cylinders, and the demolding cylinders are connected to the first module through a fixing mechanism.

[0004] The aforementioned document describes a mechanical demolding system using a demolding cylinder. Water and air cooling mechanisms can rapidly cool the product and mold, reducing product cooling time and improving overall production efficiency. However, it lacks the ability to handle plastic parts sticking to the inner wall of the molding cavity, thus failing to address the problem of material damage caused by parts sticking to the inner wall. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a plastic injection molding device that facilitates demolding, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A plastic injection molding device for easy demolding includes a mounting base. A fixing plate is vertically fixed to one end of the top of the mounting base. A first mounting plate is slidably mounted on one side of the fixing plate. A second mounting plate is fixed to the other end of the top of the mounting base. A front mold frame is bolted to the other end of the first mounting plate. A rear mold frame is bolted to the side of the second mounting plate near the front mold frame. A front molding plate is provided at the mold closing end of the front mold frame. A rear molding plate is provided at the mold closing end of the rear mold frame. Pop-out components are provided at the bottom of the interior of the front molding plate and the rear molding plate. A liquid supply component is provided on one side of the top of the mounting base.

[0008] Preferably, one end of the fixing plate is fixedly connected to multiple hydraulic cylinders, the actuating end of the hydraulic cylinders is fixedly connected to the first mounting plate, the top of the mounting base is fixed with two convex slide rails, and the bottom of the first mounting plate is provided with two concave slide grooves that fit into the convex slide rails.

[0009] Preferably, one side of the first mounting plate is fixed with multiple horizontal mounting plates, and the interior of each horizontal mounting plate has multiple first bolt holes. One end of the front mold frame has multiple mounting grooves that fit into the horizontal mounting plates, and the upper and lower walls of each mounting groove have second bolt holes that penetrate the front mold frame.

[0010] Preferably, the connection method between the second mounting plate and the rear mold frame is the same as the installation method between the first mounting plate and the front mold frame.

[0011] Preferably, four guide pillars are fixedly connected to the four corners of the other end of the front mold frame, and four guide pillar grooves for connecting the guide pillars are provided at the four corners of the side wall of the rear mold frame.

[0012] Preferably, the pop-out component includes a circular groove formed on the inner wall of the front mold plate and the rear mold plate, a hollow top post slidably disposed in the middle of the circular groove, a retaining ring disposed at one end of the outer side of the hollow top post, and a spring disposed inside the hollow top post to connect the front mold frame or the rear mold frame.

[0013] Preferably, the liquid supply component includes a liquid supply tank installed on the top of the mounting base, a liquid pump installed on the top of the liquid supply tank, an annular liquid supply pipe surrounding the outer sidewalls of the front molded plate and the rear molded plate, a plurality of nozzles being provided in the inner ring of the annular liquid supply pipe, a plurality of small through holes being provided on the sidewalls of the front molded plate and the rear molded plate, and the liquid pump being connected to the annular liquid supply pipe via a flexible liquid supply pipe.

[0014] In summary, this technical solution has the following main advantages:

[0015] This invention significantly improves production efficiency and demolding quality through modular design and a cooling and demolding coordination system. The device adopts a split mold frame structure, and the front and rear mold frames can be quickly disassembled and assembled via bolts and slide rails. The modular mold frame supports quick replacement of different mold structures. The slide rail and hydraulic linkage design simplifies the maintenance process. The precise matching of the guide pillars and guide pillar grooves ensures the mold closing alignment accuracy. The spring-driven hollow ejector pillars eject the plastic parts simultaneously when the mold opens. The vertically arranged front and rear mold frames allow the plastic parts to fall out under the action of gravity, achieving non-contact demolding and avoiding damage to the product surface.

[0016] The integrated cooling system evenly sprays cooling mist into the cavity of the mold plate during mold closing through a ring-shaped liquid supply pipe and multi-hole nozzles, accelerating the solidification and shaping of the plastic part. At the same time, it allows the plastic part to cool and shrink quickly. The continuous coverage of the cooling mist can also help the plastic part detach from the inner wall of the mold cavity, preventing the plastic part from overheating and sticking to the side wall of the mold cavity, which would cause damage during ejection. The cooling and ejection actions work together to shorten the production cycle and ensure the dimensional stability of the plastic part, meeting the high standard requirements of precision injection molding. Attached Figure Description

[0017] Figure 1 This is an isometric view of the overall structure of this utility model;

[0018] Figure 2 This is an isometric view of the overall structure of this utility model from the rear.

[0019] Figure 3 This is a schematic diagram of the half-structure of this utility model.

[0020] Figure 4 This is a schematic diagram showing the internal structure of the present invention. Figure 1 ;

[0021] Figure 5 This is a schematic diagram showing the internal structure of the present invention. Figure 2 .

[0022] Figure Descriptions: 10. Mounting base; 11. Fixing plate; 12. First mounting plate; 13. Second mounting plate; 14. Front mold frame; 15. Rear mold frame; 16. Front molding plate; 17. Rear molding plate; 18. Pop-out component; 19. Liquid supply component; 111. Hydraulic cylinder; 112. Raised slide rail; 113. Recessed slide groove; 121. Horizontal mounting plate; 122. First bolt hole; 123. Mounting groove; 124. Second bolt hole; 141. Guide post; 142. Guide post groove; 181. Circular groove; 182. Hollow top post; 183. Retaining ring; 184. Spring; 191. Liquid supply tank; 192. Liquid pump; 193. Annular liquid supply pipe; 194. Nozzle; 195. Small through hole; 196. Flexible liquid supply pipe. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Example

[0025] Please refer to the attached document carefully. Figure 1 , 2As shown in Figure 3, a plastic injection molding device for easy demolding includes a mounting base 10. A fixing plate 11 is vertically fixed to one end of the top of the mounting base 10. A first mounting plate 12 is slidably mounted on one side of the fixing plate 11. A second mounting plate 13 is fixed to the other end of the top of the mounting base 10. A front mold frame 14 is bolted to the other end of the first mounting plate 12. A rear mold frame 15 is bolted to the side of the second mounting plate 13 near the front mold frame 14. A front molding plate 16 is provided at the mold closing end of the front mold frame 14, and a rear molding plate 17 is provided at the mold closing end of the rear mold frame 15. Pop-out components 18 are provided at the bottom of the front molding plate 16 and the rear molding plate 17. A liquid supply component 19 is provided on one side of the top of the mounting base 10. Multiple horizontal mounting plates 121 are fixed to one side of the first mounting plate 12. Multiple vertical openings are provided inside the horizontal mounting plates 121. The front mold frame 14 has a first bolt hole 122, and a number of mounting grooves 123 for fitting horizontal mounting plates 121 are provided at one end of the front mold frame 14. The upper and lower walls of the mounting grooves 123 are provided with second bolt holes 124 that pass through the front mold frame 14. The connection method between the second mounting plate 13 and the rear mold frame 15 is the same as the installation method between the first mounting plate 12 and the front mold frame 14. A number of hydraulic cylinders 111 are fixedly connected to one end of the fixing plate 11. The actuating end of the hydraulic cylinders 111 is fixedly connected to the first mounting plate 12. Two convex slide rails 112 are fixedly provided on the top of the mounting base 10. Two concave slide grooves 113 for fitting the convex slide rails 112 are provided at the bottom of the first mounting plate 12. Four guide pillars 141 are fixedly connected to the four corners of the other end of the front mold frame 14. Four guide pillar grooves 142 for connecting the guide pillars 141 are provided at the four corners of the side wall of the rear mold frame 15.

[0026] As described above, the horizontal mounting plate 121 is bolted to the front mold frame 14 and the rear mold frame 15 through the first bolt hole 122 and the second bolt hole 124, so that they are placed vertically to each other, so that the plastic parts can fall directly under the action of gravity during demolding. The mounting base 10 has a discharge port in the middle located below the demolding point. When mold maintenance is required, the front mold frame 14 or the rear mold frame 15 can be quickly disassembled by removing the bolts of the first bolt hole 122 and the second bolt hole 124. When the plastic injection molding device that facilitates demolding is running, the mounting base 10 slides with the concave groove 113 of the first mounting plate 12 through the convex slide rail 112. The hydraulic cylinder 111 pushes the first mounting plate 12 to move the front mold frame 14 to the rear mold frame 15 of the second mounting plate 13. The four guide pillars 141 are precisely inserted into the guide pillar grooves 142 to complete the mold closing. The front plastic mold plate 16 and the rear plastic mold plate 17 close to form a cavity.

[0027] Please refer to the attached document carefully. Figure 1 , 2As shown in Figures 4 and 5, the pop-out component 18 includes a circular groove 181 formed on the inner wall of the front molding plate 16 and the rear molding plate 17. A hollow top post 182 is slidably provided in the middle of the circular groove 181. A retaining ring 183 is provided at one end of the outer side of the hollow top post 182. A spring 184 is provided inside the hollow top post 182 to connect the front mold frame 14 or the rear mold frame 15. The liquid supply component 19 includes a liquid supply tank 191 installed on the top of the mounting base 10. A liquid pump 192 is installed on the top of the liquid supply tank 191. A ring-shaped liquid supply pipe 193 is surrounded on the outer side wall of the front molding plate 16 and the rear molding plate 17. Multiple nozzles 194 are provided in the inner ring of the ring-shaped liquid supply pipe 193. Multiple small through holes 195 are formed on the side wall of the front molding plate 16 and the rear molding plate 17. The liquid pump 192 and the ring-shaped liquid supply pipe 193 are connected by a flexible liquid supply pipe 196.

[0028] As described above, during mold closing, the hollow ejector pin 182 compresses the spring 184 under pressure and sinks into the circular groove 181. When the hollow ejector pin 182 is fully retracted, its front end is flush with the circular groove 181. During mold opening, the liquid pump 192 of the liquid supply component 19 draws cooling spray from the liquid supply tank 191 and delivers it to the annular liquid supply pipe 193 through the soft liquid supply pipe 196. The cooling spray is evenly sprayed into the cavity through the nozzle 194 and the small through hole 195, so that the plastic part can be cooled and solidified quickly. The hydraulic cylinder 111 pulls back the first mounting plate 12 to separate the front mold frame 14 and the rear mold frame 15. The hollow ejector pin 182 of the ejector component 18 is quickly ejected from the plastic part under the rebound force of the spring 184. The retaining ring 183 restricts the displacement range of the hollow ejector pin 182 to prevent it from falling out of the circular groove 181.

[0029] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A plastic injection molding device for easy demolding, comprising a mounting base (10), wherein a fixing plate (11) is vertically fixed to one end of the top of the mounting base (10), a first mounting plate (12) is slidably disposed on one side of the fixing plate (11), and a second mounting plate (13) is fixed to the other end of the top of the mounting base (10), characterized in that, The first mounting plate (12) is bolted to the other end of a front mold frame (14), and the second mounting plate (13) is bolted to the side of the front mold frame (14) to install a rear mold frame (15). The front mold frame (14) has a front molding plate (16) at the mold closing end, and the rear mold frame (15) has a rear molding plate (17) at the mold closing end. The front molding plate (16) and the rear molding plate (17) have pop-out components (18) at their bottom interior ends, and the mounting base (10) has a liquid supply component (19) on one side of its top.

2. The plastic injection molding apparatus for easy demolding according to claim 1, characterized in that, One end of the fixed plate (11) is fixedly connected to multiple hydraulic cylinders (111), the actuating end of the hydraulic cylinders (111) is fixedly connected to the first mounting plate (12), the top of the mounting base (10) is fixed with two convex slide rails (112), and the bottom of the first mounting plate (12) is provided with two concave slide grooves (113) that fit into the convex slide rails (112).

3. The plastic injection molding apparatus for easy demolding according to claim 1, characterized in that, The first mounting plate (12) has multiple horizontal mounting plates (121) fixed on one side. The horizontal mounting plates (121) have multiple first bolt holes (122) vertically opened inside. The front mold frame (14) has multiple mounting grooves (123) that fit into the horizontal mounting plates (121) at one end. The mounting grooves (123) have second bolt holes (124) that pass through the front mold frame (14) on the upper and lower walls.

4. The plastic injection molding apparatus for easy demolding according to claim 3, characterized in that, The connection method between the second mounting plate (13) and the rear mold frame (15) is the same as the connection method between the first mounting plate (12) and the front mold frame (14).

5. A plastic injection molding apparatus for easy demolding according to claim 1, characterized in that, Four guide pillars (141) are fixedly connected at the four corners of the other end of the front mold frame (14), and four guide pillar grooves (142) connecting the guide pillars (141) are provided at the four corners of the side wall of the rear mold frame (15).

6. The plastic injection molding apparatus for easy demolding according to claim 1, characterized in that, The pop-out component (18) includes a circular groove (181) formed on the inner wall of the front molding plate (16) and the rear molding plate (17). A hollow top post (182) is slidably provided in the middle of the circular groove (181). A retaining ring (183) is provided at one end of the outer side of the hollow top post (182). A spring (184) is provided inside the hollow top post (182) to connect the front mold frame (14) or the rear mold frame (15).

7. A plastic injection molding apparatus for easy demolding according to claim 1, characterized in that, The liquid supply component (19) includes a liquid supply tank (191) installed on the top of the mounting base (10). A liquid pump (192) is installed on the top of the liquid supply tank (191). A ring-shaped liquid supply pipe (193) is surrounded on the outer sidewall of the front molding plate (16) and the rear molding plate (17). Multiple nozzles (194) are provided in the inner ring of the ring-shaped liquid supply pipe (193). Multiple small through holes (195) are opened on the sidewall of the front molding plate (16) and the rear molding plate (17). The liquid pump (192) and the ring-shaped liquid supply pipe (193) are connected through a flexible liquid supply pipe (196).

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