Plastic product forming mold

Abstract

The utility model relates to the technical field of plastic molds, and discloses a plastic product forming mold which comprises a base table, a lower mold and an upper mold, a notch is formed in the center area of the surface of the base table, a cavity is formed in the lower mold, a sliding groove is formed between the cavity and a mold cavity of the lower mold, and an auxiliary assembly is arranged in the cavity and used for assisting demolding. An overturning positioning assembly is arranged above the base table and used for overturning the lower die. According to the plastic product forming mold, by arranging the auxiliary assembly, after the upper mold enters the mold cavity of the lower mold, a release agent can be automatically sprayed to the inner wall of the mold cavity of the lower mold, subsequent demolding of a formed plastic product is facilitated, the plastic product is prevented from being adhered to the inner wall of the mold cavity, and meanwhile the auxiliary assembly can also spray the release agent to the inner wall of the mold cavity after the plastic product is formed. And a plastic product formed in the die cavity of the lower die is actively pushed out, so that automatic stripping is realized.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, specifically to a plastic product molding mold. Background Technology

[0002] A plastic mold is a molding tool used in the plastics processing industry to transform plastic raw materials (such as thermoplastics and thermosetting plastics) into plastic products with fixed shapes, sizes, and properties using specific molding methods. It ensures that the produced plastic products meet design requirements by precisely controlling the flow, filling, cooling, and curing processes of the plastic raw materials.

[0003] An existing patent (publication number: CN216658695U) discloses a plastic product molding die. By setting up this device, the waste inside the die can be automatically cleaned, saving manpower and providing comprehensive cleaning of the waste inside the die, thus improving the cleaning effect. The die includes a die, a hydraulic cylinder, a first constraint frame, a first motor, a first screw, a first slider, a first screw ring, a second constraint frame, a second motor, a second screw, a second slider, a second screw ring, a third motor, a connecting shaft, a mounting sleeve, a mounting shaft, and a brush roller. The first constraint frame is located above the die. The bottom end of the hydraulic cylinder is detachably connected to the top end of the first constraint frame. The connecting shaft is connected to the output end of the third motor. The mounting sleeve is installed at the bottom end of the connecting shaft and is equipped with a fixing device. The mounting shaft can be installed on the mounting sleeve through the fixing device. The brush roller is installed at the bottom end of the mounting shaft.

[0004] During the use of the above mold, the contact between the brush roller and the inner wall of the mold cavity cleans the inside of the mold cavity, and the cleaning agent is sprayed into the mold cavity to clean it. However, since the bottom wall of the mold cavity is flat and lacks a flow guiding structure, and the drain pipe is located on the side, after the flushing force weakens, impurities will settle and accumulate in the flat area, thus affecting the next injection molding operation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a plastic product molding die, which has advantages such as easy demolding and uniform cleaning of the mold cavity, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a plastic product molding die, comprising a base, a lower die, and an upper die, wherein a notch is provided in the central area of ​​the surface of the base, a cavity is formed inside the lower die, a groove is provided between the cavity and the lower die cavity, and an auxiliary component is provided inside the cavity for assisting demolding;

[0007] A flipping and positioning component is installed above the base for flipping the lower mold;

[0008] The base is equipped with a cleaning component for cleaning the cavity of the lower mold.

[0009] Furthermore, the auxiliary component includes a support plate that is slidably connected to the inner wall of the cavity. The central area of ​​the upper surface of the support plate has a raised structure. Multiple discharge pipes are fixedly installed on the upper surface of the support plate away from the central area. The bottom end of each discharge pipe is connected to the cavity. Multiple one-way valves are installed on the upper end of each discharge pipe along the axial direction. Each one-way valve is circumferentially distributed. Multiple insertion holes are opened between the mold cavity of the lower mold and the cavity. Each discharge pipe is slidably inserted into the corresponding insertion hole. Multiple springs are fixedly connected between the support plate and the inner wall of the cavity.

[0010] Through the above scheme, by setting multiple discharge pipes and cooperating with one-way valve, the mold release agent in the cavity can be squeezed by the pallet. After being squeezed, the mold release agent can enter the multiple discharge pipes and be discharged from the corresponding one-way valve, and sprayed into the mold cavity of the lower mold. The spring setting can push the pallet to slide vertically by the deformation force of the spring after the upper mold and the lower mold are separated, thereby pushing out the molded plastic product in the mold cavity, which facilitates the demolding of the molded plastic product.

[0011] Furthermore, the flipping positioning assembly includes a connecting column formed on one side of the lower mold along its length direction, and two bases are fixedly installed on the upper surface of the base platform. The two bases are located on both sides of the notch length direction, and the connecting column is rotatably connected to the adjacent base. A flipping motor is installed on the inner wall of one of the bases, and the output shaft of the flipping motor is fixedly connected to the lower mold.

[0012] Through the above scheme, the flipping motor can cooperate with the connection to flip the lower mold, so that the mold cavity of the lower mold can face the inside of the base, so that the cleaned impurities can fall into the base under gravity, keeping the base clean and facilitating the recycling of plastic impurities.

[0013] Furthermore, an inlet pipe is installed axially on the connecting column. One end of the inlet pipe is connected to an external infusion pipeline through a rotary joint, and the other end of the inlet pipe is equipped with a one-way valve and located inside the cavity.

[0014] The above solution, by setting a rotary joint connection method, allows the liquid inlet pipe to rotate freely when the connecting column flips with the lower mold, without damaging the pipe or affecting the normal delivery of liquid due to rotation. This ensures that liquids such as release agent can continuously and stably enter the cavity, meeting the demand for release agent during the production process.

[0015] Furthermore, the flipping positioning assembly also includes a limiting frame fixedly connected to both sides of the lower mold along the width direction, and a set of cylinders are installed on the inner walls of the two bases. Each cylinder's piston end is fixedly connected to an insertion rod, and each insertion rod is slidably inserted into the corresponding limiting frame.

[0016] With the above solution, the cylinder-driven insert rod slides into the limit frame, which can position and fix the lower mold after it is flipped, so that the lower mold can maintain a stable state after flipping, ensuring the accuracy and stability of the flipping action.

[0017] Furthermore, the cleaning component includes two lead screws rotatably connected to the inner wall of the base. One end of each lead screw is connected to a belt drive via a pulley. One end of one lead screw is fixedly connected to the output end of an external motor. A sliding table is threaded between the two lead screws. An exhaust pipe is fixedly installed on the upper surface of the sliding table. Two sets of high-pressure nozzles are fixedly connected to the circumferential surface of the exhaust pipe. Both sets of high-pressure nozzles are inclined in opposite directions. A second high-pressure nozzle is fixedly connected to the bottom end of the exhaust pipe along the axial direction.

[0018] The above solution enables uniform cleaning of the lower mold cavity by setting up cleaning components, preventing impurities from sticking to the inner wall of the lower mold and affecting the next molding of plastic products.

[0019] Furthermore, a slot is provided on the upper surface of the base away from the central area, and one end of the exhaust pipe is located in the slot and is fixedly connected to the pump output end in the outside.

[0020] The above scheme provides sufficient space for the exhaust pipe to move along with the sliding platform, allowing the exhaust pipe to move stably and maintain stable high-pressure gas delivery.

[0021] Furthermore, a plurality of limiting rods are fixedly connected to the upper surface of the base away from the central area in a matrix arrangement. The upper mold is slidably sleeved with the plurality of limiting rods in the vertical direction. A collection box is slidably inserted into one side of the base in the width direction. The collection box is in contact with the inner bottom wall of the base. An inspection door is hinged to the other side of the base in the width direction.

[0022] Through the above scheme, the limiting rod can provide guidance for the upper mold, ensuring that the upper mold can accurately enter the mold cavity of the lower mold during production. The collection box can collect the residue after cleaning. The inspection door can facilitate the maintenance of the cleaning components, and the staff can open the inspection door to inspect the cleaning components inside the base.

[0023] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0024] This plastic product molding die, by setting an auxiliary component, can automatically spray a release agent on the inner wall of the lower mold cavity after the upper mold enters the lower mold cavity, which facilitates the subsequent demolding of the molded plastic product and prevents it from sticking to the inner wall of the mold cavity. At the same time, the auxiliary component can also actively push out the molded plastic product in the lower mold cavity after the plastic product is molded, realizing automatic unloading.

[0025] The cleaning component works in conjunction with the flipping and positioning component. The flipping and positioning component can flip the lower mold and align the mold cavity of the lower mold with the cleaning component. Then, through the reciprocating movement of the sliding table in the cleaning component, high-pressure gas can be evenly sprayed into the mold cavity of the lower mold through high-pressure nozzle one and high-pressure nozzle two. This causes impurities in the mold cavity to be washed away and fall into the base under gravity, which can ensure the cleanliness of the base surface and at the same time recover the residue. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this application;

[0027] Figure 2 Cross-sectional view of the overall structure of this application Figure 1 ;

[0028] Figure 3 For this application Figure 2 Enlarged schematic diagram of the structure at point A;

[0029] Figure 4 Cross-sectional view of the overall structure of this application Figure 2 ;

[0030] Figure 5 Cross-sectional view of the overall structure of this application Figure 3 ;

[0031] Figure 6 This is a schematic diagram of the mold structure under this application;

[0032] Figure 7 This is a schematic diagram of the exhaust pipe structure of this application;

[0033] Figure 8 This is a schematic diagram of the discharge pipe structure of this application.

[0034] In the picture:

[0035] 1. Base; 2. Lower mold; 3. Upper mold; 4. Notch; 5. Cavity; 6. Slide groove;

[0036] 7. Auxiliary components;

[0037] 701. Pallet; 702. Discharge pipe; 703. One-way valve; 704. Insertion hole; 705. Spring;

[0038] 8. Flip positioning component;

[0039] 801. Connecting column; 802. Base; 803. Tilting motor; 804. Limiting frame; 805. Cylinder; 806. Insert rod;

[0040] 9. Cleaning components;

[0041] 901. Lead screw; 902. Sliding table; 903. Exhaust pipe; 904. High-pressure nozzle one; 905. High-pressure nozzle two;

[0042] 10. Liquid inlet pipe; 11. One-way valve II; 12. Groove opening; 13. Limiting rod; 14. Collection box; 15. Inspection door. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Please see Figures 1-8 In this embodiment, a plastic product molding die includes a base 1, a lower mold 2, and an upper mold 3. A notch 4 is provided in the central area of ​​the surface of the base 1. A cavity 5 is formed inside the lower mold 2. A groove 6 is provided between the cavity 5 and the mold cavity of the lower mold 2. An auxiliary component 7 is provided inside the cavity 5 to assist in demolding. The auxiliary component 7 can automatically spray a release agent into the mold cavity before the plastic product is produced, thereby effectively reducing the adhesion between the plastic product and the mold cavity and assisting in smooth demolding.

[0045] A flipping positioning component 8 is provided above the base 1 to flip the lower mold 2, so that the cleaned residue will fall into the interior of the base 1 under the action of gravity, which facilitates the centralized collection and treatment of the residue and keeps the mold and production environment clean.

[0046] The base 1 is equipped with a cleaning component 9, which is used to clean the cavity of the lower mold 2. The cleaning component 9 can use high-pressure gas to thoroughly clean the residual plastic debris, mold release agent residue and other residues in the cavity, ensuring that the cavity is clean and free of impurities, providing good conditions for the next production, and further improving the molding quality and production stability of plastic products.

[0047] The auxiliary component 7 includes a support plate 701 slidably connected to the inner wall of the cavity 5. The central area of ​​the upper surface of the support plate 701 has a raised structure. The raised structure allows the upper mold to contact the raised structure of the support plate 701 first after entering the cavity of the lower mold 2, enabling the support plate 701 to slide within the cavity 5 and compress the release agent within the cavity 5. Multiple discharge pipes 702 are fixedly installed on the upper surface of the support plate 701 away from the central area. The bottom end of each discharge pipe 702 is connected to the cavity 5. Multiple one-way valves 703 are installed on the upper end of each discharge pipe 702 along the axial direction. Each one-way valve 703 is circumferentially distributed. Multiple insertion holes 704 are opened between the cavity of the lower mold 2 and the cavity 5. Each discharge pipe 702 is slidably inserted into the corresponding insertion hole 704. The circumferentially distributed one-way valves 703 are slidably inserted into the cavity 5. 703 can spray release agent into the mold cavity from multiple directions to achieve all-round spray coverage, ensuring that all parts of the mold cavity can be evenly sprayed with release agent, further improving the demolding effect. Multiple springs 705 are fixedly connected between the support plate 701 and the inner wall of the cavity 5. By setting multiple discharge pipes 702 and one-way valve 703, the release agent in the cavity 5 can be squeezed by the support plate 701. The squeezed release agent can enter the multiple discharge pipes 702 and be discharged from the corresponding one-way valve 703 and sprayed into the mold cavity of the lower mold 2. The setting of springs 705 can push the support plate 701 to slide vertically after the upper mold 3 and the lower mold 2 are separated, thereby pushing out the molded plastic product in the mold cavity, which is convenient for demolding the molded plastic product.

[0048] The flipping positioning assembly 8 includes a connecting column 801 formed on one side of the lower mold 2 along its length. Two bases 802 are fixedly installed on the upper surface of the base 1, located on opposite sides of the notch 4 along its length. The connecting column 801 is rotatably connected to the adjacent base 802. A flipping motor 803 is installed on the inner wall of one of the bases 802. The output shaft of the flipping motor 803 is fixedly connected to the lower mold 2. The flipping motor 803 can rotate the lower mold 2 in conjunction with the connecting column, so that the mold cavity of the lower mold 2 faces the inside of the base 1. This allows the cleaned impurities to fall into the base 1 under gravity, keeping the base 1 clean and facilitating the recycling of plastic impurities. An inlet pipe 10 is installed axially on the connecting column 801. One end of the inlet pipe 10 is connected to an external infusion pipe through a pipe rotary joint. The other end of the inlet pipe 10 is equipped with a one-way valve 11 located inside the cavity 5. The core principle of the pipe rotary joint is to utilize a precise sealing structure and a special... The bearing design allows relative rotation between the rotating and stationary parts while ensuring leak-free fluid transmission between them. The rotary joint connection allows the inlet pipe 10 to rotate freely when the connecting column 801 flips with the lower mold 2, preventing damage to the pipe or disruption of normal liquid delivery. This ensures a continuous and stable flow of release agent and other liquids into the cavity 5, meeting the production process's release agent requirements. The flipping and positioning assembly 8 also includes limiting frames 804 fixedly connected to both sides of the lower mold 2 along its width. A set of cylinders 805 is installed on the inner walls of both bases 802. Each cylinder 805 has a piston end fixedly connected to a rod 806, which slidably engages with the corresponding limiting frame 804. The cylinder 805 drives the rod 806 to slide into the limiting frame 804, enabling positioning and fixing of the lower mold 2 after flipping, ensuring its stability and guaranteeing the accuracy and stability of the flipping action.

[0049] The cleaning component 9 includes two lead screws 901 rotatably connected to the inner wall of the base 1. One end of each lead screw 901 is connected to a belt drive via a pulley. One end of one lead screw 901 is fixedly connected to the output of an external motor. A sliding table 902 is threaded between the two lead screws 901. An exhaust pipe 903 is fixedly mounted on the upper surface of the sliding table 902. Two sets of high-pressure nozzles 904 are fixedly connected to the circumferential surface of the exhaust pipe 903. The two sets of high-pressure nozzles 904 are inclined in opposite directions. The inversely inclined high-pressure nozzles 904 can spray high-pressure gas into the mold cavity from different angles, expanding the cleaning range and enhancing the cleaning effect. This allows for more effective removal of residual impurities from various parts of the mold cavity. The exhaust pipe 903 is axially... The bottom end of each part is fixedly connected to a high-pressure nozzle 905. The high-pressure nozzle 905 can clean the inner wall of the lower mold cavity along its length, thereby further improving the cleaning effect inside the lower mold cavity. By setting the cleaning component 9, uniform cleaning of the lower mold cavity can be achieved, preventing impurities from sticking to the inner wall of the lower mold and affecting the next molding of plastic products. The upper surface of the base 1 away from the center area is provided with a slot 12. One end of the exhaust pipe 903 is located in the slot 12 and is fixedly connected to the output end of the pump body. The slot 12 provides the movement space for the exhaust pipe 903 when it moves with the sliding table 902, so that the exhaust pipe 903 can move stably with the sliding table 902 and maintain a stable high-pressure gas delivery.

[0050] Multiple limiting rods 13 arranged in a matrix are fixedly connected to the upper surface of the base 1 away from the central area. The upper mold 3 is slidably sleeved with the multiple limiting rods 13 along the vertical direction. A collection box 14 is slidably inserted into one side of the base 1 along the width direction. The collection box 14 contacts the inner bottom wall of the base 1. An inspection door 15 is hinged to the other side of the base 1 along the width direction. The limiting rods 13 can provide guidance for the upper mold 3, ensuring that the upper mold 3 can accurately enter the mold cavity of the lower mold 2 during production. The collection box 14 can collect the residue after cleaning. The inspection door 15 can facilitate the maintenance of the cleaning component 9. The staff can open the inspection door 15 to maintain the cleaning component 9 inside the base 1.

[0051] The working principle of the above embodiment is as follows: First, when producing plastic products, the external driving device pushes the upper mold 3 into the cavity of the lower mold 2. When the upper mold 3 contacts the protruding part of the support plate 701, the support plate 701 can squeeze the mold release agent in the cavity 5 and compress the spring 705 together, so that the mold release agent can enter the interior of multiple discharge pipes 702 and be sprayed into the interior of the mold cavity from multiple one-way valves 703. When the protruding part of the support plate 701 is horizontal with the mold cavity of the lower mold 2, the multiple discharge pipes 702 will also be horizontal with the bottom wall of the mold cavity of the lower mold 2, and then the plastic products are produced.

[0052] After the plastic product is formed, the external driving device drives the upper mold 3 to reset. When the upper mold 3 separates from the lower mold 2, the deformation force of the spring 705 can push the support plate 701 to reset, so that the support plate 701 pushes out the plastic product formed inside the mold cavity, thereby realizing automatic unloading. During the reset process of the support plate 701, a negative pressure will be formed in the cavity 5, so that the external release agent can enter the cavity 5 through the liquid inlet pipe 10 and the one-way valve 11.

[0053] After the molded plastic product is removed, multiple cylinders 805 drive the insert rods 806 to separate from the limiting frame 804. Then, the cylinders drive the lower mold 2 to rotate, so that the mold cavity of the lower mold 2 faces the inside of the base 1. Next, the cylinders 805 drive the multiple insert rods 806 to re-insert into the limiting frame 804 to position the lower mold 2. Then, an external motor drives one of the lead screws 901 to rotate. Simultaneously, the pulley and belt enable the two lead screws 901 to rotate synchronously. While the two lead screws 901 rotate, they drive the sliding table 902 to reciprocate along the axis of the lead screws 901. In the sliding motion, the external pump delivers high-pressure gas to the exhaust pipe 903, allowing the high-pressure gas to be ejected from the high-pressure nozzle 904 and the high-pressure nozzle 905. The high-pressure nozzles 904 and 905 are directed toward the inner wall of their respective mold cavities, and the exhaust pipe 903 is driven to slide back and forth by the sliding table 902, which enables the high-pressure gas to be evenly sprayed into the mold cavity of the lower mold 2, achieving uniform cleaning of the mold cavity. The residue washed by the high-pressure gas will fall into the collection box 14, which not only ensures the cleanliness of the base 1 but also allows for the recycling of the residue.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic product molding die, comprising a base (1), a lower die (2), and an upper die (3), characterized in that: The base (1) has a notch (4) in the center area of ​​its surface. The lower mold (2) has a cavity (5) inside. A groove (6) is provided between the cavity (5) and the mold cavity of the lower mold (2). An auxiliary component (7) is provided inside the cavity (5) to assist in demolding. A flipping positioning component (8) is provided above the base (1) for flipping the lower mold (2); The base (1) is equipped with a cleaning component (9) for cleaning the cavity of the lower mold (2).

2. The plastic product molding die according to claim 1, characterized in that: The auxiliary component (7) includes a support plate (701) that is slidably connected to the inner wall of the cavity (5). The central area of ​​the upper surface of the support plate (701) is a raised structure. Multiple discharge pipes (702) are fixedly installed on the upper surface of the support plate (701) away from the central area. The bottom end of each discharge pipe (702) is connected to the cavity (5). Multiple one-way valves (703) are installed at the upper end of each discharge pipe (702) along the axial direction. Each one-way valve (703) is circumferentially distributed. Multiple insertion holes (704) are opened between the mold cavity of the lower mold (2) and the cavity (5). Each discharge pipe (702) is slidably inserted into the corresponding insertion hole (704). Multiple springs (705) are fixedly connected between the support plate (701) and the inner wall of the cavity (5).

3. The plastic product molding die according to claim 1, characterized in that: The flipping positioning assembly (8) includes a connecting column (801) formed on one side of the lower mold (2) along the length direction. Two bases (802) are fixedly installed on the upper surface of the base (1). The two bases (802) are located on both sides of the notch (4) along the length direction. The connecting column (801) is rotatably connected to the adjacent base (802). A flipping motor (803) is installed on the inner wall of one of the bases (802). The output shaft of the flipping motor (803) is fixedly connected to the lower mold (2).

4. A plastic product molding die according to claim 3, characterized in that: The connecting column (801) is equipped with an inlet pipe (10) in the axial direction. One end of the inlet pipe (10) is connected to the external infusion pipeline through a pipe rotary joint. The other end of the inlet pipe (10) is equipped with a one-way valve (11) and is located in the cavity (5).

5. A plastic product molding die according to claim 3, characterized in that: The flipping positioning assembly (8) also includes a limiting frame (804) fixedly connected to both sides of the lower mold (2) along the width direction. A set of cylinders (805) are installed on the inner walls of the two bases (802). A rod (806) is fixedly connected to the piston end of each cylinder (805). Each rod (806) is slidably inserted into the corresponding limiting frame (804).

6. A plastic product molding die according to claim 1, characterized in that: The cleaning component (9) includes two lead screws (901) rotatably connected to the inner wall of the base (1). One end of each lead screw (901) is connected to a belt drive via a pulley. One end of one lead screw (901) is fixedly connected to the output end of an external motor. A sliding table (902) is threaded between the two lead screws (901). An exhaust pipe (903) is fixedly installed on the upper surface of the sliding table (902). Two sets of high-pressure nozzles (904) are fixedly connected to the circumferential surface of the exhaust pipe (903). Both sets of high-pressure nozzles (904) are tilted in opposite directions. A high-pressure nozzle (905) is fixedly connected to the bottom end of the exhaust pipe (903) along the axial direction.

7. A plastic product molding die according to claim 6, characterized in that: The base (1) has a slot (12) on its upper surface away from the central area. One end of the exhaust pipe (903) is located in the slot (12) and is fixedly connected to the pump output end in the outside.

8. A plastic product molding die according to claim 1, characterized in that: The upper surface of the base (1) away from the central area is fixedly connected with a plurality of limiting rods (13) arranged in a matrix. The upper mold (3) is slidably sleeved with the plurality of limiting rods (13) in the vertical direction. A collection box (14) is slidably inserted into one side of the base (1) in the width direction. The collection box (14) is in contact with the inner bottom wall of the base (1). An inspection door (15) is hinged to the other side of the base (1) in the width direction.

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