CN117817988A - Injection mold for large core-pulling amount workpiece - Google Patents
Injection mold for large core-pulling amount workpiece Download PDFInfo
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- CN117817988A CN117817988A CN202410152504.9A CN202410152504A CN117817988A CN 117817988 A CN117817988 A CN 117817988A CN 202410152504 A CN202410152504 A CN 202410152504A CN 117817988 A CN117817988 A CN 117817988A
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- runner plate
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- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 238000001746 injection moulding Methods 0.000 claims abstract description 60
- 230000008093 supporting effect Effects 0.000 claims abstract description 35
- 238000000465 moulding Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 15
- 238000007493 shaping process Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003578 releasing effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The application relates to a large core-pulling amount workpiece injection mold, mainly relating to the technical field of injection molds, comprising a hot runner plate fixedly arranged on a machine base, a core-pulling mechanism arranged on the hot runner plate and a fixed template arranged on the hot runner plate; the core pulling mechanism comprises a core pulling block penetrating through a through groove of the injection molding part, a sliding block penetrating through a through hole of the injection molding part, a guide rod vertically arranged on the hot runner plate, a support rod with one end penetrating through the core pulling block, a support block in sliding connection with the other end of the support rod, and a telescopic rod and an oil cylinder, wherein two ends of the telescopic rod are respectively connected with the core pulling block and the support block; the oil cylinder is fixedly arranged on the upper surface of the hot runner plate, the telescopic end of the oil cylinder is fixedly connected with the supporting block, and the sliding block, the core pulling block and the guide rod are in sliding connection along the axial direction of the guide rod. The injection molding machine has the advantages of meeting production requirements of injection molding parts with complex structures and being high in molding quality.
Description
Technical Field
The application relates to the technical field of injection molds, in particular to a large core-pulling amount workpiece injection mold.
Background
Injection molding, also called injection molding, refers to a molding process in which a plastic material is stirred at a certain temperature by a screw to be completely melted, and then injected into a mold cavity under high pressure, and cooled and solidified to obtain a plastic product. As a molding method for injection and molding, the method has the advantages of high production efficiency, high automation degree and high product richness, and is suitable for the molding processing fields of mass production, products with complex shapes and the like.
The injection mold is one of the indispensable tools in the injection molding process, and the working process of the injection mold mainly comprises mold closing, glue injection, pressure maintaining, cooling, mold opening and product taking. When the number of through holes and through grooves of the injection molding product is large, adhesion is easy to occur between the injection molding product and the injection molding mold, and the ejector pin can release the workpiece from the mold only by applying large thrust to the injection molding product in the demolding process. The phenomenon causes the injection molding product to be easily damaged in the demolding process, and causes the problem of rising defective product rate and poor molding quality.
With respect to the related art, it is known that the conventional injection mold has a defect of poor molding quality when dealing with the production of a workpiece with a complex structure.
Disclosure of Invention
In order to meet the production requirements of complex injection products and improve the molding quality of injection molding pieces, the application provides a large core-pulling amount workpiece injection mold.
The application provides a large core pulling amount workpiece injection mold adopts following technical scheme:
a large core-pulling amount workpiece injection mold comprises a hot runner plate fixedly arranged on a machine base, a core-pulling mechanism arranged on the hot runner plate and a fixed template arranged on the hot runner plate; the core pulling mechanism comprises a core pulling block penetrating through a through groove of the injection molding part, a sliding block penetrating through a through hole of the injection molding part, a guide rod vertically arranged on the hot runner plate, a support rod with one end penetrating through the core pulling block, a support block in sliding connection with the other end of the support rod, and a telescopic rod and an oil cylinder, wherein two ends of the telescopic rod are respectively connected with the core pulling block and the support block; the oil cylinder is fixedly arranged on the upper surface of the hot runner plate, the telescopic end of the oil cylinder is fixedly connected with the supporting block, and the sliding block, the core pulling block and the guide rod are in sliding connection along the axial direction of the guide rod.
Through adopting above-mentioned technical scheme, the hot runner plate has played the effect of support and spacing to the fixed die plate for the fixed die plate can take place the motion along with the die sinking direction, and the mechanism of loosing core of installing on the hot runner plate can take part in moulding process in the injection molding, and the new relative motion that can take place between the injection molding product before the completion die sinking of moulding plastics in the mechanism of loosing core, moves out complicated fragile structure department such as logical groove and the through-hole of follow injection molding product, and can assist the ejector pin to jack up the work piece from the mould, and bracing piece and telescopic link have played the effect of support and spacing to the installation and the motion of slider and loose core, and the bracing piece can promote bracing piece and telescopic link under the use of hydro-cylinder and accomplish the action of loosing core.
Optionally, the upper surface of hot runner plate is fixed and is equipped with the guide rail, the guide rail is with supporting shoe symmetry butt setting, the length direction of guide rail with the flexible direction of hydro-cylinder is parallel. 3
Through adopting above-mentioned technical scheme, the guide rail has played the guide effect to the removal of supporting shoe, can avoid the supporting shoe to take place to rock under the hydro-cylinder promotes the effect, has improved the final forming accuracy and the shaping quality of injection molding.
Optionally, a reflux passage is arranged in the core pulling block in a penetrating way, and the reflux passage is communicated with the circulating cooling equipment.
Through adopting above-mentioned technical scheme, the inside reflux passageway that runs through with circulative cooling equipment intercommunication of seting up of piece of loosing core can reduce the temperature of loosing core the piece fast for partial structures such as the logical groove of injection molding product or through-hole can realize quick heat dissipation cooling solidification through the mode of the piece of loosing core of contact, have improved the hardness of injection molding product, have improved the final forming precision and the shaping quality of injection molding product.
Optionally, a plurality of cushion blocks are installed on a side plane of the supporting block, which is close to the hot runner plate, and the cushion blocks are uniformly distributed and parallel to the upper surface of the hot runner plate.
Through adopting above-mentioned technical scheme, a plurality of cushion blocks that the supporting shoe is close to hot runner plate primary plane setting can reduce area of contact and relative frictional force between supporting shoe and the hot runner plate, and resistance that needs overcome and noise and the vibrations that produce in the reduction motion process have improved injection molding's final shaping precision and shaping quality.
Optionally, the bracing piece is close to the one end of loosing core piece is equipped with the ejector pin, the ejector pin with bracing piece sliding connection, and extend to the outside of loosing core piece to with injection molding surface butt.
Through adopting above-mentioned technical scheme, the ejector pin can be ejecting in the in-process that takes place the relative effect between bracing piece and supporting shoe, has played the auxiliary role to the drawing of patterns of moulding plastics work piece.
Optionally, a limiting end block is disposed at one end of the guide rod, which is close to the hot runner plate, and the diameter of the limiting end block is larger than that of the guide rod.
Through adopting above-mentioned technical scheme, the bracing piece is close to the spacing end piece that hot runner board one end set up and has played the effect that increases area of contact between bracing piece and the hot runner board, has improved the stability of hot runner board to guide bar supporting effect, avoids slider and loose core piece to take place to rock at the drawing of patterns in-process, has played the auxiliary role to the drawing of patterns of injection molding work piece, has improved injection molding product's final shaping precision and shaping quality.
Optionally, the cross section of the support rod is regular hexagon, and the sleeve is provided with a sliding sleeve, and the sliding sleeve is in sliding connection with the support rod and is in butt joint with the core-pulling block.
Through adopting above-mentioned technical scheme, the sliding sleeve of cover on the bracing piece can reduce the area of contact at bracing piece and loose core piece cooperation position, improves the stability of bracing piece, has improved the final shaping precision and the shaping quality of injection molding product
Optionally, a plurality of mounting grooves are formed in the side wall of the fixed die plate along the circumferential direction, the edges of the mounting grooves are subjected to chamfering treatment, and a plurality of bolt holes are formed in the vertical side wall.
Through adopting above-mentioned technical scheme, a plurality of mounting grooves of seting up of fixed template lateral wall have played spacing effect and supporting role to the installation of drawing of patterns pneumatic cylinder, and the installation of drawing of patterns pneumatic cylinder has played the auxiliary role to the drawing of patterns process, and the accuracy of its mounted position directly influences the shaping precision of injection molding product, therefore the setting up of mounting groove has improved the final shaping precision and the shaping quality of injection molding product
Optionally, a plurality of locating holes are vertically formed in four corners of the upper surface of the fixed die plate, and the locating holes are uniformly distributed along the circumferential direction of the fixed die plate.
Through adopting above-mentioned technical scheme, a plurality of locating holes of seting up perpendicularly of fixed die plate upper surface four corners position have reserved the space for wearing to establish the installation of the locating lever on fixed die plate and hot runner board, and the position of seting up not only can increase the stability in the fixed die plate motion process, simultaneously can convenient to detach to the clearance to the shaping chamber is convenient.
Optionally, the side wall of the fixed template is provided with a pouring gate along the horizontal direction; the gate is communicated with the inner forming cavity of the fixed die plate.
Through adopting above-mentioned technical scheme, the runner mobility that the fixed die plate lateral wall set up along the horizontal direction is better, is difficult for producing the cavity defect, is connected with injection molding equipment easily, has improved production efficiency.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the hot runner plate plays a role in supporting and limiting the fixed die plate, the fixed die plate can move along with the die opening direction, a core pulling mechanism installed on the hot runner plate can participate in a molding process in the injection molding process, the core pulling mechanism can move relatively with an injection molding product before the die opening is completed, the core pulling mechanism moves out of complex fragile structures such as a through groove and a through hole of the injection molding product, a workpiece can be jacked up from a die by an auxiliary ejector rod, the supporting rod and a telescopic rod play a role in supporting and limiting the installation and movement of a sliding block and a core pulling block, and the supporting block can push the supporting rod and the telescopic rod to complete the core pulling action under the use of an oil cylinder;
2. the supporting blocks are arranged close to the primary plane of the hot runner plate, so that the contact area and the relative friction force between the supporting blocks and the hot runner plate can be reduced, the resistance to be overcome and the noise and vibration generated in the movement process are reduced, and the final forming precision and the forming quality of injection products are improved;
3. the utility model provides a plurality of mounting grooves of seting up of fixed template lateral wall has played spacing effect and supporting role to the installation of drawing of patterns pneumatic cylinder, and the installation of drawing of patterns pneumatic cylinder has played the auxiliary role to the drawing of patterns process, and the accuracy of its mounted position directly influences the shaping precision of injection molding product, therefore the setting of mounting groove has improved the final shaping precision and the shaping quality of injection molding product.
Drawings
Fig. 1 is a schematic structural diagram of an injection mold for a large core pulling amount workpiece according to an embodiment of the present application.
Fig. 2 is a schematic structural view of the hot runner plate and the core pulling mechanism in the embodiment of the present application.
Fig. 3 is a schematic structural view of a stationary platen in an embodiment of the present application.
Reference numerals illustrate: 1. a hot runner plate; 11. a guide rail; 2. a core pulling mechanism; 21. a core pulling block; 22. a slide block; 23. a guide rod; 24. a support rod; 25. a support block; 26. a telescopic rod; 27. an oil cylinder; 231. limiting end blocks; 241. a sliding sleeve; 3. a stationary mold plate; 31. a mounting groove; 32. positioning holes; 33. and (5) pouring gate.
Detailed Description
The present application is described in further detail below in conjunction with fig. 1-3.
Injection molding, also called injection molding, refers to a molding process in which a plastic material is stirred at a certain temperature by a screw to be completely melted, and then injected into a mold cavity under high pressure, and cooled and solidified to obtain a plastic product. As a molding method for injection and molding, the method has the advantages of high production efficiency, high automation degree and high product richness, and is suitable for the molding processing fields of mass production, products with complex shapes and the like. The injection mold is one of the indispensable tools in the injection molding process, and the working process of the injection mold mainly comprises mold closing, glue injection, pressure maintaining, cooling, mold opening and product taking. When the number of through holes and through grooves of the injection molding product is large, adhesion is easy to occur between the injection molding product and the injection molding mold, and the ejector pin can release the workpiece from the mold only by applying large thrust to the injection molding product in the demolding process. The phenomenon causes the injection molding product to be easily damaged in the demolding process, and causes the problem of rising defective product rate and poor molding quality. In order to meet the production requirements of complex injection products and improve the molding quality of injection molding pieces, the application provides a large core-pulling amount workpiece injection mold.
The embodiment of the application discloses a large core-pulling amount workpiece injection mold. Referring to fig. 1, the large core pulling amount workpiece injection mold includes a hot runner plate 1, a core pulling mechanism 2, and a fixed mold plate 3. The hot runner plate 1 is fixedly arranged on an injection molding machine base in a bolt connection mode, the core pulling mechanism 2 is arranged on the hot runner plate 1, and the core pulling mechanism is embedded in the fixed die plate 3. The fixed template 3 and the hot runner plate 1 are overlapped up and down. The fixed platen 3 can slide in a direction perpendicular to the upper surface of the hot runner plate 1, thereby achieving mold closing and releasing actions. The core pulling mechanism 2 arranged on the hot runner plate 1 can be pulled out from fragile complex structures such as a through groove and a through hole of an injection molding product before the fixed die plate 3 is released, and an injection molding workpiece can be ejected out from the inside of a cavity to realize releasing.
Referring to fig. 1 and 2, a hot runner plate 1 is fixedly installed on an injection molding machine base by means of a plurality of fastening bolts. The hot runner plate 1 is a cuboid metal block with a circular through hole at one edge for positioning. The upper surface of the hot runner plate 1 is provided with a plurality of bolts. The upper surface of the hot runner plate 1 is symmetrically provided with two guide rails 11 in a bolt connection mode. The two guide rails 11 are attached to the upper surface of the hot runner plate 1 and are perpendicular to the side edges.
Referring to fig. 1 and 2, the core back mechanism 2 includes a core back block 21, a slider 22, a guide rod 23, a support rod 24, a support block 25, a telescopic rod 26, and an oil cylinder 27. The core-pulling block 21 is a metal block penetrating through a large-size through groove of an injection molding product, and the core-pulling block 21 participates in die assembly and is one of the component parts of the cavity. The core pulling block 21 can slide along the direction vertical to the hot runner plate 1, can slide out of the through groove of the injection molding product before die sinking, and plays a role in protecting the through groove structure of the injection molding product. The core-pulling block 21 is internally provided with a reflux passage communicated with the circulation cooling device. The structure can quickly reduce the temperature of the core-pulling block 21, so that partial structures such as a through groove or a through hole of an injection molding product can realize quick heat dissipation, cooling and solidification in a mode of contacting the core-pulling block 21, the hardness of the injection molding product is improved, and the final molding precision and the molding quality of the injection molding product are improved. The slide 22 is arranged through a small through hole of the injection molding product and cooperates with the core-pulling block 21. The guide rod 23 is a cylindrical metal rod vertically provided on the upper surface of the hot runner plate 1. The guide rods 23 are provided to penetrate the core block 21 and the slider 22, and the number of the guide rods 23 is plural. The guide rod 23 is in sliding connection with the core-pulling block 21 and the sliding block 22, and plays a limiting role on the movement of the core-pulling block 21 and the sliding block 22. The guide bar 23 is provided with a limit end block 231 near one end of the hot runner plate 1, and the limit end block 231 increases the contact area between the hot runner plate 1 and the guide bar 23. The support rod 24 is a solid metal rod having a regular hexagonal cross section. The support rod 24 is arranged in the loose core block 21 in a penetrating way and is connected with the loose core block 21 in a sliding way. One end of the support bar 24, which is close to the support block 25, is slidably connected to the support block 25. The support bar 24 is sleeved with a sliding sleeve 241. The inner wall of the sliding sleeve 241 is slidably connected with the outer wall of the supporting rod 24, and the outer wall of the sliding sleeve 241 is abutted with the inner wall of the core-pulling block 21. The end of the support bar 24 is provided with a push rod which is connected with the support bar 24 in a sliding way along the axial direction of the support bar 24 and is abutted with the surface of the injection molding piece. The support block 25 is a solid metal block having a right trapezoid cross section. A plurality of sliding grooves are arranged on the slope surface of the supporting block 25 in parallel. One ends of the supporting rod 24 and the telescopic rod 26 are clamped in sliding grooves on the sloping surface of the supporting block 25 to form sliding connection. The telescopic rod 26 is a metal rod capable of telescoping in the direction of its own axis to change its own length. One end of the telescopic rod 26 is hinged with the loose core block 21, and the other end is in sliding connection with the supporting block 25. The oil cylinder 27 is fixedly installed on the upper surface of the hot runner plate 1 in the horizontal direction. The number of the cylinders 27 is 2 and are arranged parallel to each other. The telescopic end of the oil cylinder 27 is fixedly provided with a clamping block which is clamped with the supporting block 25.
Referring to fig. 1 and 3, the fixed mold plate 3 is a rectangular parallelepiped metal block having a cavity structure formed therein, which can slide along a direction perpendicular to the upper surface of the hot runner plate 1. The fixed template 3 and the hot runner plate 1 are overlapped up and down. The side wall of the fixed die plate 3 is provided with a plurality of mounting grooves 31 for mounting the die opening hydraulic cylinder. The edge of the installation groove 31 is chamfered, and a plurality of bolt holes are formed in the side wall of the installation groove 31. Positioning holes 32 are formed in four corners of the upper surface of the fixed template 3, and the positioning holes 32 are circular through holes. The positioning holes 32 are uniformly distributed along the circumferential direction of the upper surface of the stationary platen 3. The side wall of the fixed mold plate 3 is provided with a gate 33 along the horizontal direction. The gate 33 communicates with a molding cavity inside the stationary platen 3.
The implementation principle of the large core-pulling amount workpiece injection mold provided by the embodiment of the application is as follows: after the injection molding product is cooled and hardened in the molding cavity of the fixed mold plate 3, before the mold is opened, the supporting block 25 moves along the guide rail 11 under the action of the pushing of the telescopic end of the oil cylinder 27, the telescopic rod 26 and the supporting rod 24 slide along the slope of the supporting block 25, and the core pulling block 21 connected with the telescopic rod 26 and the supporting rod 24 drives the sliding block 22 to slide along the direction of the guide rod 23 and to be separated from the inside of the fixed mold plate 3. At the same time, the ejector rods arranged at the end parts of the support rods 24 eject the workpiece from the fixed die plate 3, and finally the fixed die plate 3 moves in the direction vertical to the hot runner plate 1, so that die opening is realized.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. A large core-pulling amount workpiece injection mold is characterized in that: comprises a hot runner plate (1) fixedly arranged on a machine base, a core pulling mechanism (2) arranged on the hot runner plate (1) and a fixed template (3) arranged on the hot runner plate (1); the core pulling mechanism (2) comprises a core pulling block (21) penetrating through a through groove of an injection molding part, a sliding block (22) penetrating through a through hole of the injection molding part, a guide rod (23) vertically arranged on the hot runner plate (1), a support rod (24) with one end penetrating through the core pulling block (21), a support block (25) connected with the other end of the support rod (24) in a sliding manner, and a telescopic rod (26) and an oil cylinder (27), wherein two ends of the telescopic rod are respectively connected with the core pulling block (21) and the support block (25); the oil cylinder (27) is fixedly arranged on the upper surface of the hot runner plate (1) and the telescopic end is fixedly connected with the supporting block (25), and the sliding block (22) and the core pulling block (21) are in sliding connection with the guide rod (23) along the axial direction of the guide rod (23).
2. The large core pulling amount workpiece injection mold according to claim 1, wherein: the upper surface of hot runner plate (1) is fixed and is equipped with guide rail (11), guide rail (11) are with supporting shoe (25) symmetry butt setting, the length direction of guide rail (11) with the flexible direction of hydro-cylinder (27) is parallel.
3. The large core pulling amount workpiece injection mold according to claim 1, wherein: and a reflux passage is arranged in the core pulling block (21) in a penetrating way, and the reflux passage is communicated with the circulating cooling equipment.
4. The large core pulling amount workpiece injection mold according to claim 1, wherein: a plurality of cushion blocks are arranged on a side plane, close to the hot runner plate (1), of the supporting block (25), and the cushion blocks are uniformly distributed and parallel to the upper surface of the hot runner plate (1).
5. The large core pulling amount workpiece injection mold according to claim 1, wherein: the support rod (24) is close to one end of the core pulling block (21) and is provided with a push rod, the push rod is connected with the support rod (24) in a sliding mode, extends to the outside of the core pulling block (21) and is abutted to the surface of an injection molding piece.
6. The large core pulling amount workpiece injection mold according to claim 1, wherein: one end of the guide rod (23) close to the hot runner plate (1) is provided with a limiting end block (231), and the diameter of the limiting end block (231) is larger than that of the guide rod (23).
7. The large core pulling amount workpiece injection mold according to claim 1, wherein: the cross section of the supporting rod (24) is regular hexagon, a sliding sleeve (241) is sleeved on the supporting rod, and the sliding sleeve (241) is in sliding connection with the supporting rod (24) and is abutted to the core pulling block (21).
8. The large core pulling amount workpiece injection mold according to claim 1, wherein: a plurality of mounting grooves (31) are formed in the side wall of the fixed die plate (3) along the circumferential direction, the edges of the mounting grooves (31) are subjected to chamfering treatment, and a plurality of bolt holes are formed in the vertical side wall.
9. The large core pulling amount workpiece injection mold according to claim 1, wherein: a plurality of positioning holes (32) are vertically formed in four corners of the upper surface of the fixed die plate (3), and the positioning holes (32) are uniformly distributed along the circumferential direction of the fixed die plate (3).
10. The large core pulling amount workpiece injection mold according to claim 1, wherein: the side wall of the fixed template (3) is provided with a pouring gate (33) along the horizontal direction; the gate (33) is communicated with the inner molding cavity of the fixed mold plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410152504.9A CN117817988A (en) | 2024-02-03 | 2024-02-03 | Injection mold for large core-pulling amount workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410152504.9A CN117817988A (en) | 2024-02-03 | 2024-02-03 | Injection mold for large core-pulling amount workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117817988A true CN117817988A (en) | 2024-04-05 |
Family
ID=90517318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410152504.9A Pending CN117817988A (en) | 2024-02-03 | 2024-02-03 | Injection mold for large core-pulling amount workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117817988A (en) |
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2024
- 2024-02-03 CN CN202410152504.9A patent/CN117817988A/en active Pending
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