Injection mold convenient to clean
By introducing keyways and limiting hook structures into the injection mold, the gate inner sleeve can be independently disassembled and cleaned, solving the problem of solidification of the inner wall of the gate sleeve, improving work efficiency and reducing maintenance costs.
Patent Information
- Application Number
- CN202511846966.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-01-23
AI Technical Summary
The inner wall of the sprue bushing of existing injection molds is prone to solidification of injection molding material, resulting in slow feeding and difficulty in cleaning. In addition, the sprue bushing is an integrated structure, which makes it difficult to replace it separately when there is partial damage, affecting work efficiency and applicability.
Design an easy-to-clean injection mold by setting equidistant keyways and limiting hook structures on the inner wall of the gate sleeve to achieve independent disassembly and cleaning of the gate inner sleeve. Combined with positioning grooves and sealing ring structures, ensure stable installation and sealing of the gate outer sleeve.
This allows for the independent disassembly and cleaning of the gate inner sleeve, improving work efficiency, saving processing costs, avoiding the need for complete replacement, and enhancing the applicability and service life of the mold.
Smart Images
Figure CN121375006A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of injection mold, in particular to an injection mold convenient to clean. BACKGROUND
[0002] Injection mold is a precision tool for manufacturing plastic products, which is usually made of metal materials such as steel or aluminum, designed with parts and cavities for injecting molten plastic to form products of desired shape. These molds are widely used in electronics, automotive, medical, home and other industries, and are one of the important processing techniques in modern industry.
[0003] When using injection mold, the injection material is usually injected into the mold through the sprue bush, which is a component of the flow channel inside the mold, used to connect the metal fittings of the molding mold and the injection molding machine.
[0004] However, long-term use of injection mold will cause a lot of injection material to solidify on the inner wall of the sprue bush. If these materials are not cleaned for a long time, the sprue will become smaller, resulting in slower feeding and reducing work efficiency. In addition, the existing sprue bush is an integrated structure. If there is local damage inside the sprue bush, it cannot be independently disassembled, making it inconvenient to replace individual parts, and the applicability is relatively limited. SUMMARY
[0005] The purpose of the present application is to provide an injection mold convenient to clean to solve the problems raised in the background.
[0006] To achieve the above purpose, the present application provides the following technical scheme: an injection mold convenient to clean, comprising: a bottom plate and a top plate, the surface of the top plate is threadedly connected with a sprue bush, a plurality of equidistantly distributed key grooves are formed in the inner wall of the sprue bush, an empty slot is formed in the inside of the sprue bush, a rotating pin is fixedly installed on the side wall of the empty slot, a limit catch is sleeved on the outer surface of the rotating pin, a pull rod is fixedly installed on the upper surface of the limit catch, and a spring is sleeved on the outer surface of the pull rod. A sprue inner sleeve is fixedly installed on the outer wall of the sprue inner sleeve, a plurality of equidistantly distributed flat keys are fixedly installed on the outer wall of the sprue inner sleeve, a clamping groove is formed in the top end side wall of the sprue inner sleeve, and a discharge hole is formed in the inner surface of the sprue inner sleeve.
[0007] Preferably, the limit catch is provided with two groups, the two groups of limit catches are equidistantly and symmetrically distributed in the inner surface of the empty slot in the shape of inverted "L", and the limit catch is connected with the clamping groove in a clamping manner.
[0008] Preferably, the key groove and the flat key are arranged in the shape of a strip-shaped rectangle, the key groove and the flat key are embedded, and the sprue inner sleeve is sleeved on the inner surface of the sprue bush through the limit catch.
[0009] Preferably, the pull rod penetrates the surface of the nozzle cover, one end of the spring is fixedly connected to the outer end surface of the limiting clasp, and the other end of the spring abuts against the top end inside the clearance groove.
[0010] Preferably, the surface of the top plate is provided with a positioning groove, the inner surface of the positioning groove is provided with a positioning ring, the surface of the positioning ring is provided with a mounting groove coaxial with the positioning groove.
[0011] Preferably, the inside of the positioning ring is provided with two groups of second countersunk holes symmetrically arranged at equal distances from the center line of the nozzle cover, and the inner surface of the second countersunk hole is threadedly connected with a second fastening bolt.
[0012] Preferably, the positioning ring is threadedly connected to the positioning groove in the inner end surface of the top plate through the second fastening bolt, the surface end surface of the positioning groove is provided with a positioning hole at the center, the positioning hole is coaxial with the nozzle cover and the positioning ring, and the nozzle cover penetrates the inner surface of the positioning hole and the positioning ring.
[0013] Preferably, the upper end surface of the nozzle cover is provided with two groups of first countersunk holes symmetrically arranged at equal distances from the center line of the inner nozzle cover, the inner surface of the first countersunk hole is threadedly connected with a first fastening bolt, and the nozzle cover is threadedly connected to the inner surface of the mounting groove through the first fastening bolt.
[0014] Preferably, the upper surface of the bottom plate is fixedly provided with a lower mold, the upper end surface of the lower mold is fixedly provided with a male die core, the upper end surface of the top plate is threadedly connected with a third fastening bolt, the third fastening bolt is threadedly connected with an upper mold through the top plate, the inner surface of the upper mold is embedded with a female die core, and the male die core is embedded with the female die core.
[0015] Preferably, the outer wall of the positioning ring close to the lower end surface is provided with a sealing ring, the bottom end outer wall of the positioning groove is provided with a sealing groove, the positioning ring is threadedly connected with the positioning groove, and the sealing ring is arranged on the inner surface of the sealing groove.
[0016] Compared with the prior art, the present application has the following advantages: The injection mold is convenient to clean. The inner wall of the sprue outer sleeve is provided with a plurality of equidistantly distributed strip-shaped rectangular key grooves, the flat key on the sprue inner sleeve is inserted into the key groove, the sprue inner sleeve slides upwards along the inner wall of the sprue outer sleeve, when the top end of the sprue inner sleeve contacts the two sets of limiting hooks, the sprue inner sleeve pushes the two sets of limiting hooks to expand to the two sides through the rotating pins in the clearance grooves and compresses the springs on the upper sleeve of the pull rod, because the top end of the sprue inner sleeve is provided with a clamping groove on the two sides, when continuing to slide upwards, the two sets of limiting hooks are clamped into the clamping groove through the rebound of the springs, the limiting of the sprue inner sleeve is achieved, the limiting hooks are separated from the clamping groove by pulling the pull rod upwards to drive the two sets of limiting hooks to expand to the two sides through the rotating pins in the clearance grooves and compress the springs, and then the independent disassembly of the sprue inner sleeve is realized, the parts of the sprue inner sleeve are replaced independently, the whole is not replaced, the machining cost is saved, meanwhile, when the discharge hole of the sprue inner sleeve is blocked by the solidified injection material, the sprue inner sleeve can be independently disassembled and cleaned, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a side view of the installation of the sprue inner sleeve of the present application; Figure 3 It is a schematic diagram of the installation structure of the sprue inner sleeve of the present application; Figure 2 It is a local enlarged view of A in the present application; Figure 4 It is a sectional view of the inside of the sprue outer sleeve of the present application; Figure 5 It is a schematic diagram of the installation structure of the sprue inner sleeve of the present application; Figure 6 It is a schematic diagram of the installation structure of the sprue inner sleeve and the sprue outer sleeve of the present application; Figure 7 It is a side view of the installation of the sprue inner sleeve and the sprue outer sleeve of the present application; Figure 8 It is an exploded view of the installation structure of the sprue inner sleeve and the sprue outer sleeve of the present application.
[0018] In the figure: 1, bottom plate; 2, lower mold; 3, upper mold; 4, top plate; 5, positioning groove; 6, positioning ring; 7, installation groove; 8, sprue outer sleeve; 9, key groove; 10, sprue inner sleeve; 11, flat key; 12, clearance groove; 13, rotating pin; 14, limiting hook; 15, clamping groove; 16, pull rod; 17, spring; 18, discharge hole; 19, first countersunk hole; 20, first fastening bolt; 21, second countersunk hole; 22, second fastening bolt; 23, positioning hole; 24, sealing ring; 25, third fastening bolt; 26, sealing groove. DETAILED DESCRIPTION
[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.
[0020] Please refer to Figures 1 to 8 The present application provides a technical solution: an injection mold convenient to clean; Embodiment one: In order to realize independent disassembly of the sprue inner sleeve 10 and facilitate cleaning, the surface of the top plate 4 is threadedly connected with the sprue outer sleeve 8, the inner wall of the sprue outer sleeve 8 is provided with a plurality of equidistantly distributed key grooves 9, the inside of the sprue outer sleeve 8 is provided with an empty slot 12, the side wall of the empty slot 12 is fixedly installed with a rotating pin 13, the outer surface of the rotating pin 13 is sleeved with a limiting catch 14, the upper surface of the limiting catch 14 is fixedly installed with a pull rod 16, the outer surface of the pull rod 16 is sleeved with a spring 17, the outer wall of the sprue inner sleeve 10 is fixedly installed with a plurality of equidistantly distributed flat keys 11, the top end side wall of the sprue inner sleeve 10 is provided with a clamping groove 15, and the inner surface of the sprue inner sleeve 10 is provided with a discharge hole 18; The limiting catch 14 is provided with two groups, the two groups of limiting catches 14 are inversely "L" shaped and equidistantly and symmetrically distributed on the inner surface of the empty slot 12, the limiting catch 14 is in clamping connection with the clamping groove 15, the key groove 9 is in strip-shaped rectangular arrangement with the flat key 11, the key groove 9 is embedded with the flat key 11, the sprue inner sleeve 10 is sleeved with the limiting catch 14 on the inner surface of the sprue outer sleeve 8, the pull rod 16 penetrates through the surface of the sprue outer sleeve 8, one end of the spring 17 is fixedly connected with the outer end face of the limiting catch 14, and the other end of the spring 17 abuts against the top end inside the empty slot 12; The inner wall of the sprue outer sleeve 8 is provided with a plurality of equidistantly distributed strip-shaped rectangular key grooves 9, the flat keys 11 on the sprue inner sleeve 10 are inserted into the key grooves 9, the sprue inner sleeve 10 is slid upward along the inner wall of the sprue outer sleeve 8, when the top end of the sprue inner sleeve 10 contacts the two sets of limiting clamping hooks 14, since the contact surface of the limiting clamping hooks 14 is a slope, the sprue inner sleeve 10 will push the two sets of limiting clamping hooks 14 to expand to both sides through the rotating pins 13 in the avoidance grooves 12 and then compress the springs 17 sleeved on the pull rods 16, since the top end of the sprue inner sleeve 10 is provided with clamping grooves 15 on both sides, when continuously sliding upward, the two sets of limiting clamping hooks 14 are clamped into the clamping grooves 15 through the rebound of the springs 17, the limiting of the sprue inner sleeve 10 is achieved, by pulling the pull rods 16 to drive the two sets of limiting clamping hooks 14 to expand to both sides through the rotating pins 13 in the avoidance grooves 12 and then compress the springs 17, the limiting clamping hooks 14 can be separated from the clamping grooves 15, and then the independent disassembly of the sprue inner sleeve 10 is realized, the parts of the sprue inner sleeve 10 can be replaced individually, the overall replacement is not needed, the processing cost is saved, and when the discharge hole 18 of the sprue inner sleeve 10 is caused to be small due to the solidified injection material, the independent disassembly of the sprue inner sleeve 10 for cleaning is realized.
[0021] Embodiment two: On the basis of embodiment one, in order to realize the convenient disassembly of the sprue outer sleeve 8 and avoid the offset of the sprue outer sleeve 8 due to the excessive injection pressure, the positioning groove 5 is arranged on the surface of the top plate 4, the inner surface of the positioning groove 5 is provided with the positioning ring 6, the surface of the positioning ring 6 is provided with the mounting groove 7, the mounting groove 7 is coaxial with the positioning groove 5, the inside of the positioning ring 6 is provided with two sets of second countersunk holes 21 which are equidistantly and symmetrically arranged along the center line of the sprue outer sleeve 8, the inner surface of the second countersunk hole 21 is threadedly connected with the second fastening bolt 22, the positioning ring 6 is threadedly connected in the positioning groove 5 of the inner end surface of the top plate 4 through the second fastening bolt 22, the center of the surface end of the positioning groove 5 is provided with the positioning hole 23, the positioning hole 23 is coaxial with the sprue outer sleeve 8 and the positioning ring 6, the sprue outer sleeve 8 penetrates the inner surface of the positioning ring 6 and the positioning hole 23, The upper end surface of the sprue outer sleeve 8 is provided with two sets of first countersunk holes 19 which are equidistantly and symmetrically arranged along the center line of the sprue inner sleeve 10, the inner surface of the first countersunk hole 19 is threadedly connected with the first fastening bolt 20, the sprue outer sleeve 8 is threadedly connected in the inner surface of the mounting groove 7 through the first fastening bolt 20, the outer wall of the positioning ring 6 close to the lower end surface is sleeved with the sealing ring 24, the bottom outer wall of the positioning groove 5 is provided with the sealing groove 26, the positioning ring 6 is threadedly connected with the positioning groove 5, and the sealing ring 24 is arranged on the inner surface of the sealing groove 26; When the whole gate bushing 8 is disassembled and replaced, the second fastening bolt 22 in the second countersunk hole 21 is loosened, and the gate bushing 8 is taken out along the inner surface of the mounting groove 7. Since the positioning ring 6 is fixedly installed in the positioning groove 5 in the top plate 4 through the second fastening bolt 22, the gate bushing 8 can be prevented from being deviated due to excessive injection pressure. When the positioning ring 6 is threadedly connected with the positioning groove 5 through the second fastening bolt 22, the sealing ring 24 is arranged on the inner surface of the sealing groove 26 at this time, which can ensure the air tightness during injection and prevent the gate bushing 8 from being deviated due to excessive injection pressure.
[0022] Working principle: In actual use, when the gate bushing 10 is independently disassembled, a plurality of strip-shaped rectangular key grooves 9 are arranged on the inner wall of the gate bushing 8, the flat keys 11 on the gate bushing 10 are inserted into the key grooves 9, the gate bushing 10 is slid upward along the inner wall of the gate bushing 8, and when the top end of the gate bushing 10 contacts the two sets of limiting clamping hooks 14, the gate bushing 10 will push the two sets of limiting clamping hooks 14 to expand to both sides through the rotating pin 13 in the avoidance slot 12 and compress the spring 17 arranged on the pull rod 16. Since the top end of the gate bushing 10 is provided with the clamping groove 15 on both sides, when the gate bushing 10 is continuously slid upward, the two sets of limiting clamping hooks 14 are clamped into the clamping groove 15 through the rebound of the spring 17, the limiting and fixing of the gate bushing 10 are realized, the limiting clamping hooks 14 are separated from the clamping groove 15 by pulling the pull rod 16 to drive the two sets of limiting clamping hooks 14 to expand to both sides through the rotating pin 13 in the avoidance slot 12 and compress the spring 17, and the independent disassembly of the gate bushing 10 is realized. The parts of the gate bushing 10 can be individually replaced without the need for overall replacement, the processing cost is saved, and when the discharge hole 18 of the gate bushing 10 is reduced due to the solidified injection material, the gate bushing 10 can be independently disassembled and cleaned, and the working efficiency is improved.
[0023] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An injection mold facilitating cleaning, characterized by: Include: The bottom plate (1) and the top plate (4), the surface of the top plate (4) is threadedly connected with the sprue sleeve (8), the inner wall of the sprue sleeve (8) is provided with a plurality of equidistantly distributed key grooves (9), the inside of the sprue sleeve (8) is provided with an empty slot (12), the side wall of the empty slot (12) is fixedly installed with a rotating pin (13), the outer surface of the rotating pin (13) is sleeved with a limit catch (14), the upper surface of the limit catch (14) is fixedly installed with a pull rod (16), the outer surface of the pull rod (16) is sleeved with a spring (17); The sprue inner sleeve (10) is fixedly installed with a plurality of equidistantly distributed flat keys (11) on the outer wall, the top end side wall of the sprue inner sleeve (10) is provided with a clamping groove (15), and the inner surface of the sprue inner sleeve (10) is provided with a discharging hole (18).
2. An injection mold for facilitating cleaning according to claim 1, characterized in that: The limit catch (14) is provided with two groups, and the two groups of limit catches (14) are symmetrically arranged on the inner surface of the empty slot (12) in the shape of inverted "L".
3. An injection mold for facilitating cleaning according to claim 1, wherein: The key groove (9) and the flat key (11) are arranged in the shape of a strip rectangle, the key groove (9) and the flat key (11) are embedded, and the sprue inner sleeve (10) is sleeved on the inner surface of the sprue sleeve (8) through the limit catch (14).
4. An injection mold for facilitating cleaning according to claim 1, wherein: The pull rod (16) penetrates the surface of the sprue sleeve (8), one end of the spring (17) is fixedly connected to the outer end face of the limit catch (14), and the other end of the spring (17) abuts against the top end inside the empty slot (12).
5. An injection mold for facilitating cleaning according to claim 1, wherein: The surface of the top plate (4) is provided with a positioning groove (5), the inner surface of the positioning groove (5) is provided with a positioning ring (6), the surface of the positioning ring (6) is provided with a mounting groove (7), and the mounting groove (7) is coaxial with the positioning groove (5).
6. An injection mold for facilitating cleaning according to claim 5, wherein: The inside of the positioning ring (6) is provided with two groups of second countersunk holes (21) which are symmetrically arranged at equal distances along the center line of the sprue sleeve (8), and the inner surface of the second countersunk hole (21) is threadedly connected with a second fastening bolt (22).
7. An injection mold facilitating cleaning according to claim 6, characterized in that: The positioning ring (6) is threadedly connected in the positioning groove (5) of the inner end face of the top plate (4) through the second fastening bolt (22), the surface end face center of the positioning groove (5) is provided with a positioning hole (23), the positioning hole (23) is coaxial with the sprue sleeve (8) and the positioning ring (6), and the sprue sleeve (8) penetrates the inner surface of the positioning ring (6) and the positioning hole (23).
8. An injection mold for facilitating cleaning according to claim 1, wherein: The upper end face of the sprue sleeve (8) is provided with two groups of first countersunk holes (19) which are symmetrically arranged at equal distances along the center line of the sprue inner sleeve (10), the inner surface of the first countersunk hole (19) is threadedly connected with a first fastening bolt (20), and the sprue sleeve (8) is threadedly connected on the inner surface of the mounting groove (7) through the first fastening bolt (20).
9. An injection mold for facilitating cleaning according to claim 1, wherein: The upper surface of the bottom plate (1) is fixedly installed with a lower mold (2), the upper end face of the lower mold (2) is fixedly installed with a male die, the upper end face of the top plate (4) is threadedly connected with a third fastening bolt (25), the third fastening bolt (25) is threadedly connected with an upper mold (3) penetrating the top plate (4), the inner surface of the upper mold (3) is embedded with a female die, and the male die and the female die are embedded.
10. An injection mold for facilitating cleaning according to claim 5, wherein: The positioning ring (6) is sleeved with a sealing ring (24) close to the outer wall of the lower end face, the bottom end outer wall of the positioning groove (5) is provided with a sealing groove (26), the positioning ring (6) is in threaded connection with the positioning groove (5), and the sealing ring (24) is arranged on the inner surface of the sealing groove (26).