CN220242292U - Injection molding pipe fitting assembly mold demolding structure - Google Patents

Abstract

The utility model belongs to the field of mold demolding structures, and discloses a mold demolding structure for an injection molding pipe fitting assembly, which comprises a fixed mold assembly and a movable mold assembly, wherein the fixed mold assembly is fixed on a machine plate, the movable mold assembly is driven by an injection molding machine to be pressed and separated from the fixed mold assembly, the fixed mold assembly comprises a fixed mold cavity plate, the movable mold assembly comprises a movable mold cavity plate, a product mold cavity is formed between the fixed mold cavity plate and the movable mold cavity plate, the product is demolded and separated after injection molding in the product mold cavity, a runner is further arranged between the fixed mold cavity plate and the movable mold cavity plate, the runner is connected with each product mold cavity, a thimble is arranged in the movable mold assembly and is in propping connection with the runner, and the thimble is propped against the runner to realize product separation during demolding. The demolding structure adopts the ejector pin to push against the sub-runner, shortens the molding period and improves the production efficiency. The oil stain on the product by the thimble is avoided, and the quality of the product is improved.

Description

A kind of injection molding pipe fitting assembly mold demoulding structure

Technical field

The utility model belongs to the field of mold release structures, and in particular relates to an injection molding pipe assembly mold release structure.

Background technique

Injection molding refers to the use of the extrusion and moldability of plastics to send loose particles or powdery molding materials from the hopper of the injection machine into the high-temperature barrel to heat, melt and plasticize them, turning them into a viscous fluid solution. Driven by the high pressure of the plunger or screw, the injection is injected through the nozzle at the front end of the barrel into the closed mold with a lower temperature at a high flow rate. After a period of pressure holding and cooling, the mold can be released from the mold cavity by opening the mold. Plastic products of certain shapes and sizes.

The conventional assembly mold demoulding method is that the ejector pin is in direct contact with the product, and the ejector pin is used to press the surface of the product to separate it from the mold cavity; this demoulding method must meet a condition, the product must be completely cooled, otherwise it will cause dents. The process of waiting for cooling prolongs the production cycle of the product, and the contact between the ejector pin and the surface of the product can easily cause oil stains on the product and affect the quality of the product.

Utility model content

The purpose of this utility model is to provide an injection molding pipe fitting assembly mold demoulding structure to solve the above technical problems.

In order to achieve the above purpose, the specific technical solution of the mold demoulding structure of an injection molded pipe fitting assembly of the present invention is as follows:

A mold demoulding structure for an injection molding pipe fitting assembly, including a fixed mold component and a movable mold component. The fixed mold component is fixed on the machine plate of the injection molding machine. The movable mold component is driven by the injection molding machine to be pressed and pressed with the fixed mold component. Separate, the fixed mold assembly includes a fixed model cavity plate, the movable mold assembly includes a movable model cavity plate, a product model cavity is formed between the fixed model cavity plate and the movable model cavity plate, and the product is in the product model cavity After indoor injection molding, demoulding and separation are performed. There is also a shunt between the fixed model cavity plate and the movable model cavity plate. The shunt channel connects each product model cavity. There is an ejector pin in the movable mold assembly. The ejector pin is in top contact with the runner, and when demolding, the ejector pin pushes against the runner to achieve separation of the product.

Further, the movable mold assembly includes a movable mold press plate, a mold foot, an ejector assembly, a movable mold return plate, a movable mold core fixed plate and a movable mold cavity plate, and the movable mold press plate is fixedly connected to the injection molding machine. The entire movable mold assembly is driven by the injection molding machine. The mold foot is fixed on the movable mold press plate. The movable mold cover plate is fixed on the mold foot. The movable mold core fixed plate is fixedly connected to the movable mold cover plate. , the movable mold core fixed plate is fixedly connected to the movable mold core fixed plate, and a cavity for accommodating the ejector pin assembly is formed between the movable mold press plate, the movable mold return plate and the mold foot.

Further, the ejector pin assembly includes an ejector pin plate, an ejector pin return plate, an ejector pin, a reset rod and a return spring. The bottom of the ejector pin and the reset lever is fixedly connected to the ejector plate, and the ejector pin return plate is fixedly connected to the bottom of the ejector plate. The part of the reset rod in the cavity is covered with a return spring, the reset rod passes through the movable mold return plate and the movable model core fixed plate, and the ejector pin passes through the movable mold return plate, the movable model core fixed plate and the movable model cavity Plate, connected to the top of the shunt.

Furthermore, the dynamic mold press has a mold ejection hole on the plate. The push rod on the injection molding machine pushes the ejector pin through the mold ejection hole and pushes the ejector pin out of the surface of the mold cavity plate. At this time, the return spring is compressed and the injection molding machine After the upper push rod is retracted, the reset rod drives the ejector pin to return to the plate under the action of the reset spring, and the ejector pin completes the reset.

Further, the fixed mold assembly includes a fixed mold press plate, a fixed mold core fixing plate, a fixed mold cavity plate, a fixed mold spring, and a fixed mold limiting screw. The fixed mold press plate is fixedly connected to the injection molding machine plate. , the position is fixed, the fixed mold core fixing plate is fixed on the fixed mold press plate, the fixed mold core fixed plate is fixedly connected with the fixed mold core, and the fixed mold cavity plate is fixedly connected with the fixed mold limit screw On the fixed mold core fixed plate, the fixed mold core penetrates into the fixed mold cavity plate to form the upper half model of the product on the surface of the fixed mold cavity plate. A fixed mold spring is connected between the fixed mold core fixed plate and the fixed mold cavity plate. , the fixed mold limiting screw is used to provide a separated space between the fixed mold core fixing plate and the fixed mold cavity plate and maintain a fixed connection between the two.

Further, the movable mold assembly further includes movable mold limit screws, the movable model core fixed plate 25 is fixedly connected to the movable model core, and the movable mold cavity plate is fixedly connected to the movable mold core through the movable mold limit screws. On the model core fixed plate, the movable mold limit screw is fixedly connected to the reset rod. The movable mold limit screw is used to provide a separation space between the fixed model core fixed plate and the movable model cavity plate and maintain the separation between the two. Fixed connection.

Furthermore, the movable mold press machine plate is provided with a limiting column. The limiting column passes through the ejector plate, the ejector recombination plate and penetrates into the movable mold recombination plate. The limiting column is used to fix the positions of the ejector plate and the ejector recombination plate. , so that it does not shift.

Further, a positioning post is fixedly connected to the fixed plate of the movable model core, and the positioning post penetrates into the limiting through holes of the movable model cavity plate and the fixed model cavity plate for positioning and fixation.

Further, a plastic hook connector is fixed on the fixed mold core fixed plate, and the plastic hook connector penetrates into the fixed mold cavity plate. A plastic hook is fixed on the plastic hook connector, and the plastic hook protrudes from the fixed mold cavity plate. surface, and is interference-connected with the movable model cavity plate of the movable mold assembly. The plastic hook is used to pull the model cavity plate during the demoulding process to separate the movable model cavity plate from the movable model core fixed plate, thereby removing the movable model. The core is separated from the product 3.

Further, there are eight products, and there are multiple connectors in both the movable mold assembly and the fixed mold assembly.

The demoulding structure of the injection molding pipe assembly assembly of the present invention has the following advantages: the demoulding structure of the utility model adopts an ejector pin to push the runner. The runner has a smaller volume and is cooled quickly. There is no need to wait for the product to be completely cooled. The entire product is ejected, and then the shunt connecting the products can be cut off, which shortens the molding cycle and improves production efficiency. In addition, the ejector pin of the present invention does not contact the product, and the ejector pin is prevented from being stained with oil on the product, thereby improving the quality of the product.

Description of drawings

Figure 1 is a schematic structural diagram of a partial cross-section of one side of the demoulding structure of the injection molding pipe fitting assembly mold of the present invention;

Figure 2 is a schematic structural diagram of the partial cross-section parts on the other side of the mold demoulding structure of the injection molded pipe fitting assembly of the present invention;

Figure 3 is a schematic structural diagram of the movable mold assembly of the present invention after mold opening;

Figure 4 is a schematic structural diagram of the fixed mold assembly of the present invention after mold opening;

Marking instructions in the figure: 10. Fixed mold press plate; 11. Fixed mold core fixing plate; 12. Fixed mold cavity plate; 13. Plastic hook connecting rod; 14. Plastic hook; 15. Fixed mold spring; 16. Fixed mold limit Position screw; 111. Fixed mold core; 21. Molding machine plate; 211. Limiting column; 22. Mold foot; 23. Ejector assembly; 231. Ejector plate; 232. Ejector re-plate; 233. Ejector; 234. Reset lever ; 235, return spring; 24, movable mold return plate; 25, movable mold core fixed plate; 26, movable mold cavity plate; 261, movable mold core; 27, movable mold limit screw; 28, positioning column.

Detailed ways

In order to better understand the purpose, structure and function of the present utility model, the demoulding structure of the injection molding pipe assembly mold of the present utility model will be described in further detail below with reference to the accompanying drawings.

As shown in Figures 1 and 2, it is a schematic diagram of the main parts of the demoulding structure of the injection molding pipe assembly assembly mold of the present invention in a top view, including a fixed mold assembly and a movable mold assembly. The fixed mold assembly is fixed on the injection molding machine plate. On the machine, the movable mold component is driven by the injection molding machine and pressed against the fixed mold component to perform injection molding of the product. After the injection molding is cooled, the injection molding machine drives the movable mold component and the fixed mold component to separate and achieve demoulding.

The fixed mold assembly includes a fixed mold press plate 10, a fixed mold core fixing plate 11, a fixed mold cavity plate 12, a plastic hook connecting rod 13, a plastic hook 14, a fixed mold spring 15, and a fixed mold limit screw 16. The fixed mold press plate 10 is fixedly connected to the injection molding machine plate, and its position is fixed. The fixed mold core fixing plate 11 is fixed on the fixed mold press plate 10. The fixed mold core fixing plate 11 is fixedly connected with a fixed mold core 111. The mold cavity plate 12 is fixedly connected to the fixed mold core fixing plate 11 through the fixed mold limit screws 16. The fixed mold core 111 penetrates into the fixed mold cavity plate 12 and forms the upper half of the product model on the surface of the fixed mold cavity plate 12. The fixed mold core is fixed. A fixed mold spring 15 is connected between the plate 11 and the fixed mold cavity plate 12. When the injection molding machine drives the movable mold assembly and the fixed mold assembly to be pressed together, the fixed mold spring 15 is compressed. When the injection molding machine drives the movable mold assembly and the fixed mold assembly, the fixed mold spring 15 is compressed. When the fixed mold assembly is separated, the fixed mold core fixing plate 11 and the fixed mold cavity plate 12 are separated under the elastic force of the fixed mold spring 15, and the fixed mold limit screw 16 is used to provide the fixed mold core fixing plate 11 and the fixed mold cavity plate. 12 separate spaces and maintain a fixed connection between the two. After the fixed mold core fixing plate 11 and the fixed mold cavity plate 12 are separated, the fixed mold core 111 is separated from the product.

The movable mold assembly includes a movable mold press plate 21, a mold foot 22, an ejector assembly 23, a movable mold return plate 24, a movable mold core fixing plate 25, a movable mold cavity plate 26, a movable mold limit screw 27, and a positioning column 28. The movable mold press plate 21 is fixedly connected to the injection molding machine, and the injection molding machine drives the movement of the entire movable mold assembly. The mold foot 22 is fixed on the movable mold press plate 21, the movable mold compound plate 24 is fixed on the mold foot 22, the movable mold core fixed plate 25 is fixedly connected to the movable mold compound plate 24, and the movable mold core fixed plate 25 is fixedly connected with The movable model core 261 and the movable model cavity plate 26 are fixedly connected to the movable model core fixed plate 25 through the movable mold limit screws 27. The movable model core 261 penetrates into the movable model cavity plate 26 and forms under the product on the surface of the movable model cavity plate 26. Half part model. The injection molding machine pushes the movable mold assembly and the fixed mold assembly to be pressed together to form a product model cavity between the fixed model cavity plate 12 and the movable model cavity plate 26. The product 3 is demoulded and separated after injection molding in the product model cavity.

Positioning posts 28 are fixedly connected to the fixed plate 25 of the movable model core. The positioning posts 28 penetrate into the limiting through holes of the movable model cavity plate 26 and the fixed model cavity plate 12 for limiting and fixing.

A plastic hook connector 13 is also fixed on the fixed mold core fixing plate 11. The plastic hook connector 13 penetrates into the fixed mold cavity plate 12. A plastic hook 14 is fixed on the plastic hook connector 13. The plastic hook 14 protrudes from the fixed mold cavity plate. 12 surface, and is interference-connected with the movable mold cavity plate 26 of the movable mold assembly. The plastic hook 14 is used to pull the model cavity plate 26 during the demoulding process to separate the movable model cavity plate 26 from the movable model core fixed plate 25, thereby separating the movable model core 261 from the product 3.

A cavity for the ejector pin assembly 23 is formed between the movable mold press plate 21, the movable mold return plate 24 and the mold foot 22. The ejector pin assembly 23 includes an ejector plate 231, an ejector return plate 232, an ejector pin 233, a reset rod 234 and a return spring 235. The bottom of the ejector pin 233 and the reset rod 234 is fixedly connected to the ejector plate 231, the ejector back plate 232 is fixedly connected to the bottom of the ejector plate 231, the part of the reset rod 234 in the cavity is covered with a reset spring 235, and the reset rod 234 passes through the movable mold complex. The plate 24 and the movable model core fixing plate 25 are fixedly connected with the movable mold limit screw 27 and the reset rod 234. The movable mold limit screw 27 is used to provide a separation space between the fixed and movable model core fixing plate 25 and the movable model cavity plate 26. and keep the two firmly connected. The ejector pin 233 passes through the movable mold return plate 24 , the movable mold core fixing plate 25 and the movable mold cavity plate 26 . The movable mold press plate 21 is provided with a limiting column 211. The limiting column 211 passes through the ejector plate 231, the ejector plate 232 and penetrates into the movable mold plate 24. The limiting column 211 is used to fix the ejector plate 231 and the ejector plate 232. position so that it does not shift. There is a mold ejection hole 212 on the dynamic molding press plate 21. The push rod on the injection molding machine pushes the ejector pin 232 through the mold ejection hole 212 to push the ejector pin 233 out of the surface of the mold cavity plate 26. At this time, the return spring 235 is compressed. After the push rod on the injection molding machine is retracted, the reset rod 234 drives the ejector pin 232 to reset under the action of the reset spring 235, and the ejector pin 233 completes the reset.

Figure 1 and Figure 2 only show a single main component. The connecting parts in the movable mold assembly and the fixed mold assembly and the product 3 can include multiple ones, such as positioning posts 28, fixed mold springs 15, product model chambers, plastic There may be multiple draw hooks 14, thimbles 233, etc. As shown in Figure 3 is a schematic structural diagram of the movable mold assembly after mold opening, there are 8 product 3, 4 positioning posts 28, 4 holes matching the plastic hooks 14, 4 reset rods 234, and the movable mold There are four limit screws 27. As shown in Figures 2 and 3, there is a shunt 4 between the surface of the movable model cavity plate 26 and the fixed model cavity plate 12. The shunt 4 connects each product model cavity, and the ejector pin 233 is connected to the shunt. Road 4 is connected at the top.

As shown in Figure 4, the demoulding step: the injection molding machine mold opening signal is transmitted, and the following steps are completed from the beginning of mold opening to the end of mold opening; when the mold opening begins, the injection molding machine drives the movable mold assembly to separate, and under the action of the fixed mold spring 15 , separate the fixed mold core fixed plate 11 from the fixed mold cavity plate 12, separate the product 3 from the fixed mold core 111, release the contact between the product 3 and the fixed mold core 111, and completely separate the inner wall of the product 3 from the fixed mold core 111; mold opening process During the process, the mold opening action is used to make half of the product 3 separate from the fixed mold cavity plate 12; while the movable mold assembly continues to separate, the plastic hook 14 pulls the movable model cavity 26, and under the action of the movable mold limit screw 27, the movable mold assembly is The mold cavity plate 26 is separated from the movable mold core fixed plate 25, so that the product 3 is completely separated from the movable mold core 261. Finally, when the mold opening stroke is completed, the push rod pushes the ejector pin 233 against the runner 4, so that the product 3 is separated from the movable mold cavity plate 26, the push rod is retracted, and the ejector pin assembly is reset, thereby completing the entire action.

The demoulding structure of this utility model adopts an ejector pin to push the runner. The runner is small in size and cools quickly. The entire product can be ejected without waiting for the product to be completely cooled. After that, the runner connecting the products can be cut off. , shortening the molding cycle and improving production efficiency. In addition, the ejector pin of the present invention does not contact the product, and the ejector pin is prevented from being stained with oil on the product, thereby improving the quality of the product.

It can be understood that the present invention has been described through some embodiments. It is known to those skilled in the art that various changes or equivalents can be made to these features and embodiments without departing from the spirit and scope of the present invention. replace. In addition, in light of the teachings of the invention, modifications may be made to adapt the features and embodiments to a particular situation and material without departing from the spirit and scope of the invention. Therefore, the present utility model is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the scope of protection of the present utility model.

Claims (10)

1. An injection molding pipe fitting assembly mold demoulding structure, including a fixed mold assembly and a movable mold assembly. The fixed mold assembly is fixed on the machine plate of the injection molding machine. The movable mold assembly is driven by the injection molding machine and the fixed mold assembly. The mold assembly is pressed together and separated, characterized in that the fixed mold assembly includes a fixed mold cavity plate (12), the movable mold assembly includes a movable mold cavity plate (26), and the fixed mold cavity plate (12 ) and the movable model cavity plate (26) form a product model cavity. The product (3) is demoulded and separated after injection molding in the product model cavity. The fixed model cavity plate (12) and the movable model cavity plate (26) ), there is also a runner (4) between them. The runner (4) connects each product model cavity. There is an ejector pin (233) in the movable mold assembly. The ejector pin (233) is connected to the runner (4). ) top connection, when demoulding, the ejector pin tops the runner (4) to achieve separation of the product. 2. The injection molding pipe fitting assembly mold demoulding structure according to claim 1, characterized in that the movable mold assembly includes a movable mold press plate (21), a mold foot (22), an ejector assembly (23), a movable Mold duplication plate (24), movable mold core fixed plate (25) and movable mold cavity plate (26). The movable mold press plate (21) is fixedly connected to the injection molding machine, and the injection molding machine drives the movement of the entire movable mold assembly. , the mold foot (22) is fixed on the movable mold press plate (21), the movable mold return plate (24) is fixed on the mold foot (22), and the movable mold core fixing plate (25) is fixed on The movable mold core fixing plate (25) is fixedly connected to the movable mold core fixing plate (25), the movable mold press plate (21), the movable mold duplication plate (24) and A cavity for accommodating the ejector pin assembly (23) is formed between the mold feet (22). 3. The injection molding pipe fitting assembly mold demoulding structure according to claim 2, characterized in that the ejector pin assembly (23) includes an ejector pin plate (231), an ejector pin composite plate (232), an ejector pin (233), and a reset rod. (234) and return spring (235), the bottom of the ejector pin (233) and the reset rod (234) is fixedly connected to the ejector plate (231), and the ejector pin return plate 232 is fixedly connected to the bottom of the ejector plate (231), so The part of the reset rod (234) in the cavity is covered with a return spring (235). The reset rod (234) passes through the movable mold return plate (24) and the movable mold core fixed plate (25). The ejector pin (234) 233) passes through the movable mold compound plate (24), the movable mold core fixed plate (25) and the movable mold cavity plate (26), and is connected to the shunt channel (4). 4. The injection molding pipe fitting assembly mold demoulding structure according to claim 3, characterized in that the movable mold press plate (21) has a mold ejection hole (212), and the push rod on the injection molding machine passes through the mold ejection hole. The outlet hole (212) pushes the ejector pin back to the plate (232) to push the ejector pin (233) out of the surface of the mold cavity plate (26). At this time, the return spring (235) is compressed, and after the push rod on the injection molding machine is retracted, the reset lever (234) drives the ejector pin return plate (232) to reset under the action of the return spring (235), and the ejector pin (233) completes the reset. 5. The injection molding pipe assembly mold demoulding structure according to claim 2, characterized in that the fixed mold assembly includes a fixed mold press plate (10), a fixed mold core fixing plate (11), and a fixed mold cavity plate. (12), fixed mold spring (15), fixed mold limit screw (16), the fixed mold press plate (10) is fixedly connected to the injection molding machine plate, and the position is fixed, and the fixed mold core fixing plate (11) is fixed on the fixed mold press plate (10), the fixed mold core fixing plate (11) is fixedly connected with the fixed mold core (111), and the fixed mold cavity plate (12) is passed through the fixed mold limiting screw. (16) is fixedly connected to the fixed mold core fixing plate (11), and the fixed mold core (111) penetrates into the fixed mold cavity plate (12) to form the upper half model of the product on the surface of the fixed mold cavity plate (12). A fixed mold spring (15) is connected between the fixed mold core fixing plate (11) and the fixed mold cavity plate (12), and the fixed mold limit screw (16) is used to provide the fixed mold core fixing plate (11) and the fixed mold cavity plate (12). Separate space between the model cavity plates (12) and maintain a fixed connection between the two. 6. The injection molding pipe assembly mold demoulding structure according to claim 3, characterized in that the movable mold assembly further includes a movable mold limit screw (27), and the movable mold core fixing plate (25) There is a movable model core (261) fixedly connected to the movable model core (261), and the movable model cavity plate (26) is fixedly connected to the movable model core fixed plate (25) through the movable mold limit screw (27). The movable mold limit screw (27) 27) Fixedly connected to the reset rod (234), the movable mold limit screw (27) is used to provide a separation space between the fixed model core fixed plate (25) and the movable model cavity plate (26) and to maintain the two fixed connection. 7. The injection molding pipe fitting assembly mold demoulding structure according to claim 3, characterized in that the dynamic mold press plate (21) is provided with a limiting column (211), and the limiting column (211) passes through the ejector plate. (231), the ejector plate (232) and penetrates into the movable mold plate (24). The limiting column (211) is used to fix the positions of the ejector plate (231) and the ejector plate (232) so that they are not An offset occurs. 8. The injection molding pipe fitting assembly mold demoulding structure according to claim 5, characterized in that a positioning column (28) is fixedly connected to the fixed plate (25) of the movable mold core, and the positioning column (28) passes through Enter the limit through holes of the movable model cavity plate (26) and the fixed model cavity plate (12) for limit fixation. 9. The injection molding pipe fitting assembly mold demoulding structure according to claim 5, characterized in that a plastic hook connector (13) is also fixed on the fixed mold core fixing plate (11), and the plastic hook connector (13) Penetrate the fixed mold cavity plate (12). A plastic hook (14) is fixed on the plastic hook connector (13). The plastic hook (14) protrudes from the surface of the fixed mold cavity plate (12) and is connected with the movable mold set. The movable model cavity plate (26) of the component is interference-connected, and the plastic hook (14) is used to pull the model cavity plate (26) during the demoulding process, so that the movable model cavity plate (26) is connected to the movable model core fixed plate (26). 25) is separated to separate the dynamic model core (261) from the product (3). 10. The injection molding pipe fitting assembly mold demoulding structure according to claim 1, characterized in that the product (3) has eight pieces, and the connectors in the movable mold assembly and the fixed mold assembly have multiple pieces. indivual.