A mold structure for an externally threaded five-way drainage pipe joint

Abstract

This invention discloses a mold structure for an externally threaded five-way drainage pipe fitting, designed to address the inconvenience of demolding externally threaded five-way drainage pipe fittings. The invention comprises a fixed mold frame and a movable mold frame, with a cavity formed between the fixed and movable mold frames. Within the cavity are several movable core posts corresponding to the drainage pipe fitting openings. A demolding ejector pin is mounted on the movable mold frame. This externally threaded five-way drainage pipe fitting facilitates demolding, improving work efficiency and reducing equipment investment.

Description

Technical Field

[0001] The invention relates to a mould structure, and more particularly to a mould structure for an externally threaded five-way drainage pipe joint. Background Art

[0002] Currently, drainage pipe fittings are often manufactured using injection molding. After injection molding, demolding is required to free the workpiece from the mold and facilitate unloading. Traditional demolding methods involve manual removal or robotic removal. Manual unloading is inefficient and poses safety risks, while robotic removal increases equipment investment costs. Externally threaded five-way drainage fittings have five interfaces, each with external threads, making demolding difficult. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a mold structure for an externally threaded five-way drainage pipe fitting joint, which facilitates the demoulding operation of the externally threaded five-way drainage pipe fitting, is conducive to improving work efficiency and reducing equipment investment.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a mold structure for an externally threaded five-way drainage pipe fitting joint, comprising a fixed mold frame and a movable mold frame, a cavity being formed between the fixed mold frame and the movable mold frame, a plurality of core columns corresponding one-to-one to the openings of the drainage pipe fitting joint being arranged in the mold cavity, the core columns being movable, and a demolding ejector rod being installed on the movable mold frame for lifting and lowering.

[0005] The drainage pipe fitting is molded within the mold cavity, with the core column positioned within the cavity. The fitting is formed in the space between the outer wall of the core column and the inner wall of the cavity. During demolding, the movable and fixed mold frames separate, and the core column moves away from the cavity, allowing the core column to be ejected from the open end of the drainage pipe fitting. The movable mold frame then moves, separating the drainage pipe fitting from the fixed mold frame. The ejector pin then pushes the fitting upward, completely freeing it from the mold. The externally threaded five-way drainage fitting is easy to demold, improving work efficiency and reducing equipment investment.

[0006] Preferably, a sliding seat driven by a piston cylinder is installed on the fixed mold frame, and a core column is installed on the sliding seat; a fixed mold insert is installed on the fixed mold frame, and a molding pattern matching the thread on the drainage pipe joint is provided on the lower surface of the fixed mold insert.

[0007] The piston cylinder drives the core column on the fixed mold frame to move, facilitating automatic demoulding. The fixed mold insert is provided with molding lines for forming the threads on the drainage pipe joints.

[0008] Preferably, a left slider and a right slider driven by a piston cylinder are installed on the movable mold frame, and both the left slider and the right slider are provided with molding lines that match the threads on the drainage pipe joint.

[0009] During demoulding, the left slider and the right slider move away from each other, which facilitates demoulding between the molding lines and the threads on the drainage pipe joint.

[0010] Preferably, a left push rod is installed on the left slider, a right push rod is installed on the right slider, a buffer spring is installed between the left push rod and the left slider, a buffer spring is installed between the right push rod and the right slider, and the end of the left push rod and the end of the right push rod are in contact with each other.

[0011] When the left slider and the right slider move away from each other for demoulding, the buffer spring plays a certain pushing role to assist in demoulding.

[0012] Preferably, a front slider and a rear slider driven by a piston cylinder are installed on the movable mold frame, a core column is installed on the front slider, and a movable mold insert is installed on the rear slider. The end face of the movable mold insert is provided with a molding pattern that matches the thread on the drainage pipe joint.

[0013] The front slider moves forward to demould the core column, and the rear slider moves backward to facilitate demoulding between the molding lines on the end face of the movable mold insert and the threads on the drainage pipe joint.

[0014] Preferably, a core column is mounted on the upper surface of the movable die frame. The movable die block moves to demould the core column.

[0015] Preferably, the movable mold frame is provided with a movably arranged left oblique block and a right oblique block, and a core column is installed on each of the left oblique block and the right oblique block; the left oblique block and the right oblique block are provided with an inclined guide hole, and two inclined guide rods are connected to the fixed mold frame, and the two guide rods are respectively adapted to be inserted into the guide holes on the left oblique block and the right oblique block.

[0016] As the left and right oblique blocks move with the movable mold frame, the guide rods and guide holes work together to move the blocks away from the mold cavity, allowing the core columns on the blocks to be ejected from the mold. This movement does not require an additional drive mechanism, simplifying the structure and reducing costs.

[0017] Preferably, a die base is mounted on the movable die frame, and molding lines matching the threads on the drainage pipe joints are provided on the upper surface and side surfaces of the die base. The molding lines are provided on the die base for easy maintenance and replacement.

[0018] Preferably, the mold base is provided with a lifting inclined top, which is connected to a rocker arm, which is tilted, and a lower mold plate is provided below the movable mold frame, the lower end of the rocker arm is hinged on the lower mold plate, and a positioning plate is installed on the movable mold frame, and a socket is provided on the positioning plate, and the rocker arm is movably connected to the socket; the molding lines on the side of the mold base are provided on the side of the inclined top.

[0019] After the mold base moves downward with the movable mold frame for demoulding, the movable mold frame remains stationary, and the lower mold plate moves upward, causing the inclined top to move upward and outward along with the upper end of the swing arm, achieving demoulding of the molded lines on the side of the inclined top. At the same time, the upward push of the inclined top can eject the drainage pipe fitting upward from the mold base to achieve demoulding. Because the inclined top moves in an inclined direction, it moves outward while moving upward, further pushing the drainage pipe fitting outward, facilitating demoulding and blanking of the drainage pipe fitting.

[0020] Preferably, an insert fixing plate is provided above the fixed mold frame, an upper mold plate is mounted on the insert fixing plate, and the upper end of the fixed mold insert is connected to the insert fixing plate; a gate is provided on the upper mold plate, and a feed flow channel is provided between the gate and the cavity.

[0021] The upper mold plate and the insert fixing plate move together to realize the lifting of the fixed mold insert, and the gate and feed runner are convenient for feeding.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the external threaded five-way drainage pipe fitting joint mold structure of the present application facilitates the demoulding operation of the external threaded five-way drainage pipe fitting, which is beneficial to improving work efficiency and reducing equipment investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the present invention with the fixed mold frame removed;

[0025] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 4 is a front-to-back cross-sectional view of the present invention;

[0027] Figure 5 It is a left-right cross-sectional view of the present invention;

[0028] Figure 6 It is a structural diagram of the position of the oblique rod of the present invention;

[0029] Figure 7 It is a schematic diagram of the mold base structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the connection structure of the inclined roof of the present invention;

[0031] Figure 9 It is a structural schematic diagram of the drainage pipe joint of the present invention;

[0032] In the figure: 1. fixed mold frame, 2. movable mold frame, 3. core column, 4. demoulding ejector pin, 5. drain pipe joint, 6. sliding seat, 7. fixed mold insert, 8. molding pattern, 9. left slider, 10. right slider, 11. positioning groove, 12. insert fixing plate, 13. upper template, 14. gate, 15. feed runner, 16. left ejector pin, 17. right ejector pin, 18. buffer spring, 19. front slider, 20. rear slider, 21. movable mold insert, 22. left oblique block, 23. right oblique block, 24. guide hole, 25. guide rod, 26. slide rail, 27. mold base, 28. inclined ejector pin, 29. rocker arm, 30. lower template, 31. positioning plate, 32. socket, 33. positioning strip, 34. guide surface, 35. guide groove. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example: A mold structure for a five-way external threaded drainage pipe fitting (see attached Figure 1 To the attached Figure 9 ), including a fixed mold frame 1 and a movable mold frame 2, a mold cavity is formed between the fixed mold frame and the movable mold frame, a plurality of core columns 3 corresponding to the openings of the drainage pipe joints are arranged in the mold cavity, the core columns can be moved, and a demoulding ejector rod 4 with a lifting arrangement is installed on the movable mold frame.

[0035] The five openings on the drainage pipe fitting 5 are designated a, b, c, d, and e. Each opening is externally threaded. The d axis forms a 45-degree angle with the e axis, the a and b axes form a 45-degree angle with the e axis, and the c axis forms a 45-degree angle with the e axis. The a, b, and e openings are arranged horizontally, the c opening is positioned vertically downward, and the d opening is tilted upward. This type of drainage pipe fitting is difficult to demold.

[0036] The fixed die frame is mounted with a sliding seat 6 driven by a piston cylinder. The piston cylinder's telescopic rod is connected to the sliding seat, which is tilted. A core column is mounted on the sliding seat, which corresponds to port d on the drainage pipe fitting. Two vertically positioned fixed die inserts 7 are mounted on the fixed die frame. Their lower surfaces are provided with molded patterns 8 that mate with the threads on the drainage pipe fitting. The patterns on the two fixed die inserts correspond to portions of the threads at ports a and b, respectively.

[0037] The movable mold frame is equipped with a left slider 9 and a right slider 10, driven by a piston cylinder. Both sliders have molded patterns that match the threads on the drainage pipe fittings. A positioning groove 11 is provided on the lower surface of the fixed mold frame, into which the left and right sliders fit. The two fixed mold inserts extend through the left and right sliders, respectively. The left and right sliders are connected to the telescopic rods of the piston cylinders. The inner walls of the left and right sliders form part of the mold cavity. The two molded patterns on the left slider correspond to the threads on the left side of the d and e ports, respectively, while the two molded patterns on the right slider correspond to the threads on the right side of the d and e ports, respectively. An insert fixing plate 12 is installed above the fixed mold frame, onto which an upper mold plate 13 is mounted. The upper end of the fixed mold insert is connected to the insert fixing plate. A gate 14 is provided on the upper mold plate, and a feed channel 15 is provided between the gate and the mold cavity. A left push rod 16 is installed on the left slider, a right push rod 17 is installed on the right slider, a buffer spring 18 is installed between the left push rod and the left slider, a buffer spring is installed between the right push rod and the right slider, and the end of the left push rod and the end of the right push rod are in contact with each other.

[0038] The movable mold frame is mounted with a front slider 19 and a rear slider 20, driven by a piston cylinder. The front and rear sliders are connected to the telescopic rods of the two piston cylinders. A core column is mounted on the front slider, while a movable mold insert 21 is mounted on the rear slider. The end surface of the movable mold insert features molding patterns that align with the threads on the drainage pipe fitting. The core column on the front slider corresponds to port e on the drainage pipe fitting. The molding patterns on the movable mold insert correspond to the threads to the left of port c on the drainage pipe fitting.

[0039] The movable mold frame is mounted with a removable left oblique block 22 and right oblique block 23, each of which is equipped with a core column. Both the left and right oblique blocks are provided with an inclined guide hole 24. Two inclined guide rods 25 are connected to the fixed mold frame, which respectively fit into the guide holes on the left and right oblique blocks. The core column on the left oblique block corresponds to port a on the drainage pipe fitting, while the core column on the right oblique block corresponds to port b on the drainage pipe fitting. The left and right oblique blocks are placed on either side of the sliding seat. Slide rails 26 are provided on the movable mold frame and on the left and right oblique blocks, respectively. The left and right oblique blocks are slidably connected to the two slide rails. During the lifting and lowering of the movable mold block, the left and right oblique blocks move along the two slide rails.

[0040] A core column is installed on the upper surface of the movable mold frame. The core column protrudes upward from the movable mold frame and corresponds to the C port on the drainage pipe joint.

[0041] A mold base 27 is mounted on the movable mold frame. Its upper and side surfaces feature molded patterns that align with the threads on the drainage pipe fitting. The mold base features a liftable slanted top 28, connected to a tilted rocker 29. A lower mold plate 30 is hinged to the lower mold plate at its lower end. A positioning plate 31 is mounted on the movable mold frame, with a socket 32 ​​provided. The rocker flexibly engages the socket. The molded patterns on the sides of the mold base are located on the sides of the slanted top. The slanted top features a positioning bar 33 with a T-shaped cross-section and inclined guide surfaces 34 on its sides. The mold base features a slot that mates with the slanted top. The side walls of the slot feature an inclined guide groove 35 that mates with the positioning bar, allowing the positioning bar to be movably mounted within the groove. The molded patterns on the side of the slanted top align with the threads to the right of the C-port of the drainage pipe fitting. Three molding lines are designed on the upper surface of the mold base, corresponding to the threads below port a, port b, and port e on the drainage pipe fitting. The lower end of the demoulding pin is securely connected to the lower mold plate, while the upper end extends through the mold base to its upper surface. The pin is positioned vertically.

[0042] The drainage pipe fitting is formed within a mold cavity. Five core columns are positioned within the cavity. Raw material is added to the cavity through the gate, forming the drainage pipe fitting within the space between the outer wall of the core columns and the inner wall of the cavity. During demolding, the movable and fixed mold frames are first separated to achieve a primary mold opening. The movable mold frame moves downward, allowing the molding patterns on the two movable mold inserts to be pulled away from the drainage pipe fitting, and the molding patterns corresponding to the partial threads at ports a and b are demolded. The sliding seat mounted on the fixed mold frame is then pulled outward by the piston cylinder, allowing the core column corresponding to port d to be separated from port d of the drainage pipe fitting. Following this, a secondary mold opening occurs, with the movable mold frame continuing to move downward. The left and right oblique blocks slide outward under the action of guide rods, allowing the core column on the left oblique block to be pulled out from port a on the drainage pipe fitting, and the core column on the right oblique block to be pulled out from port b on the drainage pipe fitting.

[0043] After the secondary mold opening is completed, the left slider and the right slider are driven outward by the piston cylinder, and the two molded lines on the left slider are demolded from the partial threads on the left side of the d-port and e-port positions, and the two molded lines on the right slider are demolded from the partial threads on the right side of the d-port and e-port positions.

[0044] The front and rear sliders are driven outward by the piston cylinder, and the core column on the front slider is extracted from the e-port on the drainage pipe fitting. The molded pattern on the movable mold insert is demolded from the threads to the left of the c-port on the drainage pipe fitting. At this point, the drainage pipe fitting remains on the die base. The lower die plate then moves upward, causing the slanted ejector to move upward and outward along with the upper end of the swing arm, demolding the molded pattern on the side of the slanted ejector from the threads to the right of the c-port on the drainage pipe fitting. Simultaneously, the slanted ejector pushes upward, ejecting the drainage pipe fitting upward and outward from the die base. The ejector pin moves upward along with the lower die plate to eject the drainage pipe fitting.

[0045] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A mold structure for an externally threaded five-way drainage pipe joint, characterized in that: It includes a fixed mold frame and a movable mold frame, a mold cavity is formed between the fixed mold frame and the movable mold frame, a number of core columns corresponding to the openings of the drainage pipe joints are arranged in the mold cavity, the core columns can be moved, and a demoulding ejector rod with a lifting arrangement is installed on the movable mold frame; a left slider and a right slider driven by a piston cylinder are installed on the movable mold frame, and the left slider and the right slider are provided with molding lines that match the threads on the drainage pipe joints; a front slider and a rear slider driven by a piston cylinder are installed on the movable mold frame, a core column is installed on the front slider, and a movable mold insert is installed on the rear slider, and the end face of the movable mold insert is provided with a thread that matches the thread on the drainage pipe joints The mold base has an upper and lower slanted top, which is connected to the swing arm, and the swing arm is tilted. A lower mold plate is provided below the movable mold frame, and the lower end of the swing arm is hinged to the lower mold plate. A positioning plate is installed on the movable mold frame, and a socket is provided on the positioning plate. The swing arm is movably connected to the socket; the molding lines on the side of the mold base are provided on the side of the slanted top.

2. The external threaded five-way drainage pipe joint mold structure according to claim 1 is characterized in that: A sliding seat driven by a piston cylinder is installed on the fixed mold frame, and a core column is installed on the sliding seat; a fixed mold insert is installed on the fixed mold frame, and a molding pattern matching the thread on the drainage pipe joint is provided on the lower surface of the fixed mold insert.

3. The external threaded five-way drainage pipe joint mold structure according to claim 1 is characterized in that: A positioning groove is provided on the lower surface of the fixed mold frame, and the left slider and the right slider are both adapted to be installed in the positioning groove.

4. The external threaded five-way drainage pipe joint mold structure according to claim 3 is characterized in that: A left push rod is installed on the left slider, a right push rod is installed on the right slider, a buffer spring is installed between the left push rod and the left slider, a buffer spring is installed between the right push rod and the right slider, and the end of the left push rod and the end of the right push rod are butted together.

5. The external threaded five-way drainage pipe joint mold structure according to claim 1 is characterized in that: Slide rails are correspondingly arranged on the movable mold frame and the left oblique block and the right oblique block. The left oblique block and the right oblique block are respectively slidably connected to the two slide rails.

6. The external threaded five-way drainage pipe joint mold structure according to claim 1 is characterized in that: A core column is installed on the upper surface of the movable mold frame.

7. The external threaded five-way drainage pipe joint mold structure according to claim 1 is characterized in that: The left oblique block and the right oblique block are both provided with obliquely arranged guide holes, and the fixed mold frame is connected with two obliquely arranged guide rods, which are respectively adapted to be inserted into the guide holes on the left oblique block and the right oblique block.

8. The mold structure of the external threaded five-way drainage pipe fitting according to claim 2 is characterized in that An insert fixing plate is arranged above the mold frame, an upper mold plate is installed on the insert fixing plate, and the upper end of the fixed mold insert is connected to the insert fixing plate; a gate is arranged on the upper mold plate, and a feed runner is arranged between the gate and the cavity.

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