A top cover injection mold for a pre-filter

Abstract

The application discloses a top cover injection mold for a pre-filter and relates to the technical field of molds, which has the advantages of simplified mold structure, reduced cost and realization of the advantages of one guide column driving the synchronous core-pulling of the complex structure on the inner side of the pre-filter top cover product, and the technical scheme is as follows: the mold comprises an upper mold core and a lower mold core, the lower surface of the upper mold core is concavely provided with an annular upper cavity, a threaded inner core for forming the internal thread of a product is arranged in the upper cavity, the upper surface of the lower mold core is concavely provided with an annular lower cavity, a cylindrical inner core is arranged in the lower cavity, the threaded inner core and the cylindrical inner core are in contact when the mold is closed, and the upper cavity and the lower cavity jointly form a molding space of the pre-filter top cover product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to a top cover injection mold for a pre-filter. BACKGROUND

[0002] The pre-filter is the first rough filtering device for household water, usually installed at the total water inlet of the water pipe. It filters out rust, silt, insect eggs, algae and other large-particle impurities in tap water through the internal stainless steel filter screen or PP cotton filter element. Its core function is to protect the household pipe network system and prolong the service life of downstream water-related appliances such as water purifiers, water heaters, washing machines, and intelligent toilets. It is a non-electric, simple but very important basic water purification device.

[0003] The pre-filter top cover is a core structural component of the device, which is a ring structure with multiple functions such as water inlet / outlet channel, internal thread interface, internal claw / slot fixing structure, and sealing surface. Four claws are arranged circumferentially on the upper side of the inner part, and four slots are arranged circumferentially on the lower side of the inner part. In order to efficiently and repeatedly reproduce the complex geometry (such as threads, concave-convex structures) and cavity channel of the part at one time, achieve mass production, high consistency, and low cost, injection molding process is adopted.

[0004] However, the traditional injection molding process for the pre-filter top cover which integrates internal threads, internal protrusions (claws), and recesses (slots) often uses a rotating demolding mechanism for internal threads and a side core-pulling mechanism for internal protrusions and recesses, resulting in a complex mold structure. SUMMARY

[0005] To solve the above technical problems, the present application adopts the following technical scheme:

[0006] To solve the above technical problems, the present application adopts the following technical scheme:

[0007] The present application provides a top cover injection mold for a pre-filter, which includes an upper mold frame, a lower mold frame, an upper mold core installed on the upper mold frame, and a lower mold core installed on the lower mold frame. The lower surface of the upper mold core is recessed with an annular upper cavity, and the upper cavity is provided with a threaded inner core for forming the internal threads of the product.

[0008] The upper surface of the lower mold core is recessed with an annular lower cavity, and the lower cavity is provided with a cylindrical inner core.

[0009] When the upper mold core and the lower mold core are closed, the lower surface of the threaded inner core and the upper surface of the cylindrical inner core are in contact, and the upper cavity and the lower cavity together form a molding space for the pre-filter top cover product.

[0010] The upper forming assembly is further used for forming the clamping claws arranged circumferentially on the inner wall of the front filter cover product;

[0011] The upper forming assembly comprises at least one upper sliding groove formed in the interior of the threaded inner core, the upper sliding groove extends and penetrates out of the threaded inner core, and an opening is formed on the outer wall of the threaded inner core, which is referred to as an upper penetration opening;

[0012] An upper sliding block is arranged to slide in the upper sliding groove, an outer end portion of the upper sliding block is provided with an upper forming portion, the upper forming portion enters the upper penetration opening, the outer wall of the upper forming portion is smoothly connected with the outer wall of the threaded inner core, and a forming groove for forming the clamping claw is formed on the upper forming portion;

[0013] The lower forming assembly is further used for forming the clamping slots arranged circumferentially on the inner wall of the front filter cover product;

[0014] The lower forming assembly comprises at least one lower sliding groove formed in the interior of the cylindrical inner core, the lower sliding groove extends and penetrates out of the cylindrical inner core, and an opening is formed on the outer wall of the cylindrical inner core, which is referred to as a lower penetration opening;

[0015] A lower sliding block is arranged to slide in the lower sliding groove, an outer end portion of the lower sliding block is provided with a lower forming portion, the lower forming portion enters the lower penetration opening, the lower forming portion is smoothly connected with the outer wall of the cylindrical inner core, and a forming protrusion for forming the clamping slot is arranged on the lower forming portion;

[0016] The driving assembly is further used for driving the upper sliding block and the lower sliding block;

[0017] The driving assembly comprises a guide column, the guide column is matched with the upper sliding block and the lower sliding block, and the guide column is configured to move downward, so that the upper sliding block and the lower sliding block are synchronously moved outward to a position at which a complete product forming space is formed, and the guide column is configured to move upward, so that the upper sliding block and the lower sliding block are synchronously moved inward to a position at which demolding is facilitated.

[0018] By adopting the above scheme, the upper sliding block located in the interior of the threaded inner core and the lower sliding block located in the interior of the cylindrical inner core are simultaneously driven by one guide column, the synchronous core pulling of the clamping claws and the clamping slots on the inner side of the front filter cover product is realized, the mold structure is simplified, a plurality of independent driving systems are saved, the manufacturing and maintenance costs are reduced, the reliability and synchronism of the action are improved, and an unobstructed and safe space is provided for the manual rotation of the product by the operator.

[0019] The upper forming assembly for forming the clamping claws and the lower forming assembly for forming the clamping slots are respectively arranged in the interior of the threaded inner core and the cylindrical inner core, the core space of the mold is fully utilized, the overall layout of the mold is more reasonable and compact, and the mold is suitable for occasions with limited installation space.

[0020] Preferably, the upper die core is provided with a movable slot for mounting and moving the guide column up and down; an upper sliding groove is arranged on the inner wall of the movable slot and communicates with the movable slot; the bottom end of the movable slot extends downward to the end of the threaded inner core to form an opening, which is called a guide-out slot; the outer surface of the guide column is provided with a driving slope; the side of the upper sliding block away from the formed part extends into the movable slot and is provided with a passive slope matched with the driving slope; the upper surface of the lower sliding block is concave and provided with a guide slot; the bottom end of the guide column integrally extends downward and is provided with a guide block matched with the guide slot; the guide block passes through the guide-out slot and enters the guide slot.

[0021] Preferably, the upper die seat plate is located above the upper die frame away from the upper die core; the top end of the movable slot extends upward to the top end of the upper die frame to form an opening, which is called a moving-out slot; the top end of the guide column passes through the moving slot and out of the upper die frame; the guide column out of the upper die frame is connected to the upper die seat plate; the injection molding machine body is located outside the upper die seat plate and the lower die seat plate; the injection molding machine body is provided with a delay separation assembly for controlling the stepwise movement of the upper die seat plate and the upper die frame; when the mold is opened, the upper die seat plate moves upward first, drives the guide column to move upward, and makes the upper sliding block and the lower sliding block shrink inward; the upper formed part enters the upper through-opening, and the lower formed part enters the lower through-opening; then the upper die frame and the upper die core move upward together, separate from the upper die core and the lower die frame, and realize mold opening.

[0022] Preferably, the delay separation assembly includes sliding rails fixed on both sides of the injection molding machine body and arranged vertically; a moving block is slidably connected to the sliding rails; a top plate with a C-shaped cross section is fixed to the side of the moving block away from the sliding rails; the horizontal edge at the bottom end of the top plate is fixed to the side wall of the upper die frame; a support block is fixed to the side wall of the upper die seat plate and located inside the top plate with a preset distance from the horizontal edge at the top end of the top plate.

[0023] Preferably, four guide rods are fixed to the four corners of the upper surface of the lower die frame; the guide rods pass through the upper die frame and the upper die seat plate and are slidably connected thereto; one end of the guide rod out of the upper die seat plate is fixed to the injection molding machine body; the power mechanism of the injection molding machine body is connected to the upper die seat plate and drives the upper die seat plate to move up and down along the guide rod.

[0024] Preferably, a bracket is arranged beside the upper die core and the lower die core; the injection molding machine body is provided with a control assembly for rotating the support rod into the upper die core and the lower die core when the mold is opened.

[0025] Preferably, the control assembly comprises a mounting frame fixed to the outer wall of the injection molding machine; a short shaft is rotatably connected to the mounting frame, and a short swing rod coaxially fixed to the short shaft is nested outside the short shaft; a long swing rod is hingedly connected to the end of the short swing rod, and an arc-shaped plate is hingedly connected to the end of the long swing rod away from the short swing rod; an ear seat is further fixed to the mounting frame, a connecting rod is hingedly connected to the ear seat, and the end of the connecting rod is connected to the arc-shaped plate; the end of the arc-shaped plate away from the long swing rod is connected to a support; and a transmission assembly for controlling the rotation of the short shaft is arranged on the mounting frame.

[0026] Preferably, the transmission assembly comprises a gear nested outside the short shaft and coaxially fixed to the short shaft, and the gear is located beside the short swing rod; and a vertical gear rack is fixed to the outer wall of the upper mold frame, and the gear rack is engaged with the gear.

[0027] Preferably, a groove is formed through the support; and a supporting plate for preventing the product from falling and hurting the lower mold core is slidably connected in the groove.

[0028] Preferably, protrusions are arranged at intervals on the inner wall of the groove, and the supporting plate forms a friction pair with the support through the protrusions.

[0029] The beneficial effects of the present application are that the upper slider inside the threaded inner core and the lower slider inside the cylindrical inner core are simultaneously driven by one guide column, the synchronous core-pulling of the complex structure of the clamping jaw and the clamping groove on the inner side of the front filter top cover product is realized, the mold structure is simplified, multiple independent drive systems are saved, the manufacturing and maintenance costs are reduced, the reliability and synchronism of the action are improved, and an unobstructed and safe space is provided for the operator to manually rotate out the product.

[0030] The upper molding assembly forming the clamping jaw and the lower molding assembly forming the clamping groove are respectively built-in inside the threaded inner core and the cylindrical inner core, the core space of the mold is fully utilized, the overall layout of the mold is more reasonable and compact, and the mold is suitable for occasions with limited installation space. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 It is a schematic structural diagram of the overall structure of the present embodiment;

[0033] Figure 2 It is a schematic structural diagram of the overall rear view of the present embodiment;

[0034] Figure 3Structure schematic diagram for embodying the top plate of the present embodiment;

[0035] Figure 4 Structure schematic diagram for embodying the lower die core of the present embodiment;

[0036] Figure 5 Structure schematic diagram for embodying the present embodiment Figure 4 Structure schematic diagram enlarged at B;

[0037] Figure 6 Structure schematic diagram for embodying the upper die core of the present embodiment;

[0038] Figure 7 Structure schematic diagram for embodying the present embodiment Figure 6 Structure schematic diagram enlarged at C;

[0039] Figure 8 Structure schematic diagram for embodying the upper slide groove of the present embodiment;

[0040] Figure 9 Structure schematic diagram for embodying the present embodiment Figure 8 Structure schematic diagram enlarged at D;

[0041] Figure 10 Structure schematic diagram for embodying the present embodiment Figure 8 Structure schematic diagram enlarged at E;

[0042] Figure 11 Structure schematic diagram for embodying the pre-filter top cover product of the present embodiment;

[0043] Figure 12 Structure schematic diagram for embodying the present embodiment Figure 2 Structure schematic diagram enlarged at A.

[0044] Explanation of reference numerals:

[0045] In the drawing: 1, upper die frame; 2, lower die frame; 3, upper die core; 4, lower die core; 6, threaded inner core; 7, upper cavity; 8, lower cavity; 9, cylindrical inner core; 10, pre-filter top cover product; 11, clamping jaw; 12, clamping groove; 13, upper slide groove; 14, upper through-opening; 15, upper slide block; 16, upper forming portion; 17, forming groove; 18, lower slide groove; 19, lower through-opening; 20, lower slide block; 21, lower forming portion; 22, forming protrusion; 23, guide post; 24, movable groove; 25, guide-out groove; 26, driving bevel; 27, driven bevel; 28, guide groove; 29, guide block; 30, upper die base plate; 31, injection molding machine body; 32, slide rail; 33, moving block; 34, top plate; 35, support block; 36, guide rod; 37, support; 38, mounting frame; 39, short shaft; 40, short swing lever; 41, long swing lever; 42, arc plate; 43, ear seat; 44, connecting rod; 45, gear; 46, rack; 47, supporting plate. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0047] A top cover injection mold for a pre-filter, comprising an upper mold frame 1, a lower mold frame 2, an upper mold core 3 mounted on the upper mold frame 1, and a lower mold core 4 mounted on the lower mold frame 2, characterized in that: a lower surface of the upper mold core 3 is concavely provided with an annular upper cavity 7, and a threaded inner core 6 for forming an inner thread of a product is arranged in the upper cavity 7. Figures 1 to 12 An upper surface of the lower mold core 4 is concavely provided with an annular lower cavity 8, and a cylindrical inner core 9 is arranged in the lower cavity 8.

[0048] When the upper mold core 3 and the lower mold core 4 are closed, a lower surface of the threaded inner core 6 abuts against an upper surface of the cylindrical inner core 9, and the upper cavity 7 and the lower cavity 8 jointly form a molding space of a pre-filter top cover product 10.

[0049] The upper molding assembly further comprises at least one upper sliding groove 13 formed in the threaded inner core 6, the upper sliding groove 13 extends and penetrates out of the threaded inner core 6, and an opening is formed on an outer wall of the threaded inner core 6, which is referred to as an upper penetrating opening 14.

[0050] An upper sliding block 15 is slidably arranged in the upper sliding groove 13, an outer end of the upper sliding block 15 is provided with an upper molding portion 16, the upper molding portion 16 enters the upper penetrating opening 14, an outer wall of the upper molding portion 16 is smoothly connected with an outer wall of the threaded inner core 6, and a molding groove 17 for forming the pawl 11 is formed on the upper molding portion 16.

[0051] The lower molding assembly further comprises at least one lower sliding groove 18 formed in the cylindrical inner core 9, the lower sliding groove 18 extends and penetrates out of the cylindrical inner core 9, and an opening is formed on an outer wall of the cylindrical inner core 9, which is referred to as a lower penetrating opening 19.

[0052]

[0053] The lower molding assembly further comprises at least one lower sliding groove 18 formed in the cylindrical inner core 9, the lower sliding groove 18 extends and penetrates out of the cylindrical inner core 9, and an opening is formed on an outer wall of the cylindrical inner core 9, which is referred to as a lower penetrating opening 19.

[0054]

[0055] ​​A sliding block 20 is provided in the sliding groove 18. The outer end of the sliding block 20 is provided with a lower forming part 21. The lower forming part 21 enters the lower through opening 19. The lower forming part 21 is smoothly connected to the outer wall of the cylindrical inner core 9. The lower forming part 21 is provided with a forming protrusion 22 for forming the slot 12.

[0056] It also includes a driver component;

[0057] The driving assembly includes a guide post 23, which is a cylindrical structure driven by the upper mold base 1 and the upper mold core 3. Its bottom end is provided with a tapering structure with a gradually decreasing outer cross section, which is used to cooperate with the upper slider 15 and the lower slider 20 to control the movement of the upper slider 15 and the lower slider 20. The guide post 23 is configured such that when the guide post 23 moves down, the upper slider 15 and the lower slider 20 move outward synchronously to the position that forms a complete product forming space. When the guide post 23 moves up, the upper slider 15 and the lower slider 20 move inward synchronously to the position that facilitates demolding.

[0058] By simultaneously driving the upper slider 15 located inside the threaded inner core 6 and the lower slider 20 located inside the cylindrical inner core 9 through a guide post 23, the complex structure of the claws 11 and slots 12 inside the pre-filter top cover product 10 is pulled out synchronously. This simplifies the mold structure, eliminates multiple independent drive systems, reduces manufacturing and maintenance costs, improves the reliability and synchronization of the action, and provides an unobstructed and safe space for operators to manually unscrew the product.

[0059] The upper forming component that forms the claw 11 and the lower forming component that forms the slot 12 are respectively built into the threaded inner core 6 and the cylindrical inner core 9, making full use of the core space of the mold, making the overall layout of the mold more reasonable and compact, and suitable for occasions with limited installation space.

[0060] include Figure 4 and Figure 5 and Figure 6 and Figure 7 and Figure 8 The upper mold core 3 has a movable groove 24 for the guide post 23 to be installed and move up and down; the upper sliding groove 13 is located on the inner wall of the movable groove 24 and communicates with the movable groove 24; the bottom end of the movable groove 24 extends downward to the end of the threaded inner core 6, forming an opening, called the guide groove 25; the outer surface of the guide post 23 has an active inclined surface 26; the active inclined surface 26 is located on the outer wall of the closing structure, the upper slider 15 extends into the movable groove 24 on the side opposite to its forming part, and has a passive inclined surface 27 that cooperates with the active inclined surface 26; the upper surface of the lower slider 20 has a guide groove 28 recessed; the bottom end of the guide post 23 has an integrally downward extending guide block 29 that is adapted to the guide groove 28; the guide block 29 passes through the guide groove 25 and enters the guide groove 28.

[0061] Through the cooperation of the active slope 26 and the passive slope 27, the guide block 29 cooperates with the guide groove 28 to form a stable and rigid power transmission path. This mechanical direct drive avoids the delay, deformation or uncertainty that may be caused by the use of flexible elements, ensures the accuracy and synchronization of the movement of the up-down moving block 33, and avoids product damage caused by different core pulling.

[0062] comprising Figure 4 and Figure 5 and Figure 6 and Figure 7 and Figure 8 , the upper die holder plate 30 is located above the upper die core 3 away from the upper die holder 1, the top end of the movable groove 24 extends upward to the top end of the upper die holder 1 to form an opening, which is called a moving-out groove; the top end of the guide column 23 passes through the moving groove to the upper die holder 1, and the guide column 23 passing through the upper die holder 1 is connected to the upper die holder plate 30; further comprising an injection molding machine body 31 located outside the upper die holder plate 30 and the lower die holder plate; The injection molding machine body 31 is provided with a delay separation assembly for controlling the stepwise movement of the upper die holder plate 30 and the upper die holder 1; The delay separation assembly is configured such that when the mold is opened, the upper die holder plate 30 moves upward first, driving the guide column 23 to move upward, causing the upper sliding block 15 and the lower sliding block 20 to retract inward, the upper forming part 16 is retracted into the upper through-opening 14, and the lower forming part 21 is retracted into the lower through-opening 19, and then the upper die holder 1 and the upper die core 3 are driven to move upward together, separated from the upper die core 3 and the lower die holder 2, and the mold is opened.

[0063] The delay separation assembly ensures strict demolding sequence. The mold cannot be opened before the core is pulled out and the pawl 11 and the pawl groove 12 are completely separated from the mold, avoiding the product being pulled, broken or even the mold being damaged when the sequence is reversed.

[0064] As Figure 1 and Figure 2 and Figure 3 , the delay separation assembly includes a slide rail 32 fixed on both sides of the injection molding machine body 31 and arranged vertically; The moving block 33 is slidably connected on the slide rail 32; The moving block 33 is fixed with a top plate 34 with a C-shaped cross section on the side away from the slide rail 32, and the top plate 34 is fixed to the side wall of the upper die holder 1 at the horizontal edge of the bottom end; The side wall of the upper die holder plate 30 is fixed with a support block 35, and the support block 35 is located in the top plate 34 and has a predetermined distance from the horizontal edge at the top end of the top plate 34.

[0065] The preset interval is at least greater than the stroke required for the guide pillar 23 to drive the upper slider 15 and the lower slider 20 to complete the core-pulling, when the mold is opened, the upper mold base plate 30 drives the support block 35 to move upward, within the preset interval, the support block 35 is not in contact with the top plate 34, and the upper mold frame 1 remains stationary, when the support block 35 moves upward to contact the horizontal edge of the top plate 34 at the top end, the upper mold frame 1 and the upper mold core 3 fixed with the top plate 34 are driven to move upward together, which is composed of simple mechanical components, does not need to rely on hydraulic valves, sensors or electronic control systems, the design structure is firm, the response is direct, and is not easy to malfunction, through the accurate design of the preset interval, the strict demolding sequence is forced to be specified, and it is ensured that the upper mold base plate 30 must drive the guide pillar 23 to complete sufficient stroke, so that all the side core-pulling upper and lower sliders 20 completely exit the product inside, and then the upper mold frame 1 starts to move to realize the mold opening.

[0066] As Figure 1 and Figure 2 and Figure 3 The four corner edges of the upper surface of the lower mold frame 2 are fixed with guide rods 36; the guide rods 36 penetrate through the upper mold frame 1 and the upper mold base plate 30 and are in sliding fit with the upper mold base plate 30; one end of the guide rod 36 penetrating out of the upper mold base plate 30 is fixed to the injection molding machine body 31; the power mechanism of the injection molding machine body 31 is connected with the upper mold base plate 30 and drives the upper mold base plate 30 to move up and down along the guide rod 36.

[0067] As Figure 1 and Figure 2 and Figure 3 The guide rods 36 play a guiding and limiting role in the movement of the upper mold frame 1 and the upper mold base plate 30, which ensures that the upper and lower mold cores 4 can achieve very high centering and repeating accuracy every time the mold is closed, thereby ensuring that the product wall thickness is uniform and avoiding quality problems such as flash or mold pressing.

[0068] As Figure 12 A support 37 is arranged beside the upper mold core 3 and the lower mold core 4; the injection molding machine body 31 is provided with a control assembly that rotates the support rod into the upper mold core 3 and the lower mold core 4 when the mold is opened.

[0069] As Figure 12 When the upper mold core 3 and the lower mold core 4 are opened, the operator needs to manually rotate and take out the molded pre-filter top cover product 10, the control assembly provides power to automatically rotate the support 37 into the upper and lower mold cores 4 when the mold is opened, forms a physical barrier, and isolates the mold parts that are still in motion or may be accidentally closed, preventing the operator's hands from being injured.

[0070] As Figure 12, the control assembly comprises a mounting frame 38 fixed to the outer wall of the injection molding machine; a short shaft 39 is rotatably connected to the mounting frame 38, and a short swing rod 40 coaxially fixed with the short shaft 39 is nested outside the short shaft 39; a long swing rod 41 is hingedly connected to the end of the short swing rod 40, and an arc-shaped plate 42 is hingedly connected to the end of the long swing rod 41 away from the short swing rod 40; an ear seat 43 is further fixed to the mounting frame 38, a connecting rod 44 is hingedly connected to the ear seat 43, and the end of the connecting rod 44 is connected to the arc-shaped plate 42; the end of the arc-shaped plate 42 away from the long swing rod 41 is connected to the support 37; and the mounting frame 38 is provided with a transmission assembly for controlling the rotation of the short shaft 39.

[0071] Through the power provided by the transmission assembly, when the mold is opened, the short shaft 39 is driven to rotate, and through the power transmission of the short swing rod 40, the long swing rod 41, the arc-shaped plate 42 and the connecting rod 44, the rotational motion of the short shaft 39 is converted into the planar rotational motion of the support 37, so that the support 37 can be rotated into or out of the upper mold core 3 and the lower mold core 4. Single power source driving, simplified control, and good self-locking effect, a self-locking effect that requires a large torque to reverse is generated at the short shaft 39, making the support 37 very stable in the protection position.

[0072] As Figure 12 , the transmission assembly comprises a gear 45 nested outside the short shaft 39 and coaxially fixed with the short shaft 39, and the gear 45 is located beside the short swing rod 40; a vertical rack 46 is fixed to the outer wall of the upper mold frame 1, and the rack 46 is engaged with the gear 45.

[0073] The opening and closing motion of the upper mold frame 1 is used as a power source, which significantly reduces the manufacturing cost, energy consumption and post-maintenance complexity, ensures the immediacy and certainty of the protection action, and further improves the safety.

[0074] As Figure 12 , a recess is formed through the support 37; and a supporting plate 47 for preventing the product from falling and damaging the lower mold core 4 is slidably connected in the recess.

[0075] The slidable supporting plate 47 constitutes a second line of defense, which is located below the formed product, and when the product falls off, it will fall on the supporting plate 47 instead of directly hitting the fragile lower mold core 4, thereby reducing the risk of damaging the precision mold due to accidental falling, and the supporting plate 47 is slidably connected to the support 37 to avoid rotation interference.

[0076] As Figure 12 , protrusions are arranged at intervals on the inner wall of the recess, and the supporting plate 47 forms a friction pair with the support 37 through the protrusions.

[0077] In use, after injection molding is completed, the power mechanism of the injection molding machine body 31 provides power to drive the upper mold base plate 30 to move upwards. Within the preset distance, the upper mold base plate 30 moving upwards will drive the guide column 23 connected to the upper mold base plate 30 to move upwards. After the guide column 23 moves upwards, through the cooperation of the driving slope 26 and the passive slope 27, the upper sliding block 15 moves towards the center line of the movable groove 24. The upper forming part 16 enters the movable groove 24 through the upper through-out opening 14. The guide block 29 moves in the guide-out groove 25 and cooperates with the guide groove 28 to make the lower sliding block 20 move in the lower sliding groove 18 towards the center line of the cylindrical inner core 9. The lower forming part 21 moves away from the lower through-out opening 19, realizing the synchronous core-pulling of the upper sliding block 15 and the lower sliding block 20. At this time, the pawl 11 and the pawl groove 12 are completely separated from the upper forming part 16 and the lower forming part 21.

[0078] After the core-pulling is completed, the support block 35 moves upwards to contact the horizontal edge at the top end of the top plate 34, and drives the upper mold frame 1 and the upper mold core 3 fixed with the top plate 34 to move upwards together. Through the cooperation of the sliding rail 32 and the moving block 33, the movement of the top plate 34 is guided. The upper mold core 3 and the lower mold core 4 are separated to realize mold opening and expose the injection molded pre-filter top cover product 10.

[0079] At the same time, the upper mold frame 1 moves upwards to drive the rack 46 fixed with the upper mold frame 1 to move upwards. The rack 46 moving upwards drives the gear 45 meshing with the rack 46 to rotate. The gear 45 rotating drives the short shaft 39 to rotate. The short shaft 39 rotating drives the short swing rod 40 to rotate. The short swing rod 40 rotating drives the long swing rod 41 hinged with the short swing rod 40 to rotate. The long swing rod 41 rotating drives the arc-shaped plate 42 hinged with the long swing rod 41 to rotate. The rotation of the arc-shaped plate 42 is limited by the ear seat 43 and the connecting rod 44. The rotation of the arc-shaped plate 42 drives the support 37 fixed with the arc-shaped plate 42 to rotate. The rotational movement of the short shaft 39 is converted into the planar rotational movement of the support 37. The support 37 is rotated into the space between the upper mold core 3 and the lower mold core 4. The support 37 forms a physical barrier to isolate the mold parts that are still in motion or may be accidentally closed, preventing the hands of the operator from being injured.

[0080] Then manually push the supporting plate 47 to slide in the groove to make the supporting plate 47 move below the formed product, constituting the second line of defense.

[0081] The staff member holds the product and manually rotates the product to facilitate the removal of the formed pre-filter top cover product 10, avoiding the damage of the internal threads of the pre-filter top cover product 10 caused by forced removal.

[0082] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A top cover injection mold for a pre-filter, comprising an upper mold frame (1), a lower mold frame (2), an upper mold core (3) mounted on the upper mold frame (1), and a lower mold core (4) mounted on the lower mold frame (2), wherein the lower surface of the upper mold core (3) is recessed with an annular upper cavity (7), the upper cavity (7) is provided with a threaded inner core (6) for forming the internal thread of the product, and the upper surface of the lower mold core (4) is recessed with an annular lower cavity (8), the lower cavity (8) is provided with a cylindrical inner core (9), wherein when the mold is closed, the threaded inner core (6) abuts against the cylindrical inner core (9), and the upper cavity (7) and the lower cavity (8) together form the forming space for the injection-molded top cover product (10) of the pre-filter, characterized in that: It also includes an upper forming assembly for forming the upper side of the inner wall of the pre-filter top cover product (10) with circumferentially arranged claws (11), and a lower forming assembly for forming the lower side of the inner wall of the pre-filter top cover product (10) with circumferentially arranged slots (12). The upper forming component includes at least one upper sliding groove (13) opened inside the threaded inner core (6), an upper sliding block (15) is slidably provided in the upper sliding groove (13), and an upper forming part (16) with a forming groove (17) is provided at the outer end of the upper sliding block (15). The lower forming component includes at least one sliding groove (18) opened in the cylindrical inner core (9), a sliding block (20) is slidably provided in the sliding groove (18), and a lower forming part (21) with a forming protrusion (22) is provided at the outer end of the sliding block (20). It also includes a drive assembly, which includes a guide post (23) that cooperates with the upper slider (15) and the lower slider (20) to drive the upper slider (15) and the lower slider (20) to move synchronously in and out. A bracket (37) is provided on the side of the upper mold core (3) and the lower mold core (4); The injection molding machine body (31) is equipped with a control component that allows the support rod to rotate and enter between the upper mold core (3) and the lower mold core (4) when the mold is opened; The control assembly includes a mounting bracket (38) fixed to the outer wall of the injection molding machine body (31). A short shaft (39) is rotatably connected to the mounting bracket (38), and a short swing rod (40) is nested outside the short shaft (39) and fixed coaxially with the short shaft (39). The end of the short swing rod (40) is hinged to a long swing rod (41), and the end of the long swing rod (41) away from the short swing rod (40) is hinged to an arc plate (42). The mounting bracket (38) is also fixed with an ear seat (43), and a connecting rod (44) is hinged to the ear seat (43). The end of the connecting rod (44) is connected to an arc plate (42). The end of the arc plate (42) away from the long swing rod (41) is connected to the bracket (37); The mounting bracket (38) is provided with a transmission assembly for controlling the rotation of the short shaft (39).

2. The injection mold for the top cover of a pre-filter as described in claim 1, characterized in that, The upper mold core (3) is provided with a movable groove (24) for the guide post (23) to be installed and move up and down. The upper sliding groove (13) is provided on the inner wall of the movable groove (24) and communicates with the movable groove (24); The bottom end of the movable groove (24) extends downward to the end of the threaded inner core (6) to form an opening, which is called the outlet groove (25). The outer surface of the guide post (23) is provided with an active inclined surface (26); The upper slider (15) extends into the movable groove (24) on the side opposite to its forming part, and is provided with a passive inclined surface (27) that cooperates with the active inclined surface (26). The upper surface of the lower slider (20) is recessed with a guide groove (28); The bottom end of the guide post (23) extends downward integrally with a guide block (29) that is compatible with the guide groove (28). The guide block (29) passes through the outlet slot (25) and enters the guide slot (28).

3. The injection mold for the top cover of a pre-filter as described in claim 2, characterized in that, It also includes an upper mold base plate (30), which is located above the upper mold frame (1) away from the upper mold core (3). The top of the movable groove (24) extends upward to the top of the upper mold frame (1) to form an opening, which is called the removal groove; The top of the guide post (23) passes through the upper mold frame (1) through the moving groove, and the guide post (23) passing through the upper mold frame (1) is connected to the upper mold base plate (30). It also includes the injection molding machine body (31) located outside the upper mold base plate (30) and the lower mold base plate; The injection molding machine body (31) is provided with a delayed separation component that controls the movement of the upper mold base plate (30) and the upper mold frame (1) in stages.

4. The injection mold for the top cover of a pre-filter as described in claim 3, characterized in that, The delayed separation assembly includes slide rails (32) that are fixed to both sides of the injection molding machine body (31) and arranged vertically. A movable block (33) is slidably connected on the slide rail (32); The moving block (33) is fixed with a top plate (34) with a C-shaped cross section on the side away from the slide rail (32). The horizontal edge of the top plate (34) at the bottom is fixed to the side wall of the upper mold frame (1). The upper mold base plate (30) has a support block (35) fixed on its side wall. The support block (35) is located inside the top plate (34) and has a preset distance from the horizontal edge of the top plate (34) at the top.

5. The injection mold for a top cover of a pre-filter as described in claim 1, characterized in that, It also includes an upper mold frame (1) and a lower mold frame (2), and guide rods (36) are fixed at the four corners of the upper surface of the lower mold frame (2). The guide rod (36) passes through the upper mold frame (1) and the upper mold base plate (30) and the two slide together; One end of the guide rod (36) that protrudes from the upper mold base plate (30) is fixed to the injection molding machine body (31); The power mechanism of the injection molding machine body (31) is connected to the upper mold base plate (30) and drives the upper mold base plate (30) to move up and down along the guide rod (36).

6. The injection mold for a top cover of a pre-filter as described in claim 1, characterized in that, The transmission assembly includes a gear (45) nested outside the short shaft (39) and fixed coaxially with the short shaft (39), the gear (45) being located beside the short rocker arm (40); The upper mold frame (1) has a vertical rack (46) fixed on its outer wall, and the rack (46) meshes with a gear (45).

7. The injection mold for a top cover of a pre-filter as described in claim 6, characterized in that, The bracket (37) has a through groove; The groove is slidably connected to a support plate (47) to prevent the product from falling and damaging the lower mold core (4).

8. The injection mold for a top cover of a pre-filter as described in claim 7, characterized in that, The inner wall of the groove is provided with protrusions at intervals, and the support plate (47) forms a friction pair with the bracket (37) through the protrusions.

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