A rapid injection molding equipment for injection molding products

Abstract

The present invention discloses a rapid injection molding device for injection molded products, comprising a threaded rod, a positioning groove, a flow-diverting plate, a blocking plate, a stirring block, a threaded connector, a first return spring and a second return spring. The threaded rod is provided with a positioning groove, and the positioning groove is provided with a flow-diverting plate, a blocking plate and a threaded connector. The flow-diverting plate in the positioning groove can be tilted and reset by the first return spring, the second return spring and the blocking plate. The threaded connector can drive all the flow-diverting plates to rotate synchronously to realize the overall rotation of the flow-diverting plates. A stirring block is provided on the surface of the threaded rod, and the stirring block can cooperate with the flow-diverting plate to improve the molding speed of the injection molded product.

Description

Technical Field

[0001] The invention relates to the field of injection molding equipment, in particular to rapid injection molding equipment for injection molded products. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill the mold cavity;

[0003] The injection molding machine contains an injection molding system, which is one of the most important components of the injection molding machine. Generally, there are plunger type, screw type, screw pre-plastic plunger injection type and other main forms. The most widely used is the screw type. Its function is to heat and plasticize a certain amount of plastic within a specified time in one cycle of the injection molding machine, and then inject the molten plastic into the mold cavity through the screw at a certain pressure and speed. After the injection is completed, the molten material injected into the mold cavity is kept in shape;

[0004] During the production process of injection molded products, the shear heat caused by the rotation of the threaded rod and the heating of the heating plate on the outside of the pipe can heat the plastic evenly, improve the quality of the injection molded products and reduce the failure rate. Therefore, it is necessary to heat the plastic more evenly to improve the molding efficiency of the injection molded products. Summary of the invention

[0005] The object of the present invention is to provide a rapid injection molding device for injection molded products, which can improve the molding speed of injection molded products in the injection molding process.

[0006] In order to solve the above problems, the present invention provides the following technical solutions: a rapid injection molding device for injection molding products, comprising a threaded rod, the threaded rod is arranged in an outer cylinder, one end of the outer cylinder is provided with a spray port, the outer side surface of the outer cylinder is sleeved with a plurality of heating rings, the outer side of the outer cylinder is provided with a feed port that passes through the outer side surface and the inner side surface of the outer cylinder, the surface of the threaded rod is provided with a positioning groove along the thread surface, a plurality of flow diversion plates are connected in the positioning groove, the flow diversion plates are arranged in a spiral shape along the thread line of the threaded rod, a flow diversion auxiliary plate is connected to the side of the flow diversion plate close to the axis of the threaded rod, and the flow diversion auxiliary plate is connected to the side of the flow diversion plate close to the axis of the threaded rod. The sheet is hinged with one end of a supporting sheet, and the other end of the supporting sheet is movably connected to the adjustment groove, a first return spring is arranged on the side of the supporting sheet, and the two ends of the first return spring are respectively connected to the adjustment groove and the flow-diverting auxiliary sheet, the first return spring is connected to the side of the supporting sheet closer to the plastic entry end, the threaded rod drives the plastic to contact the flow-diverting sheet by rotating, so that the first return spring is compressed, and at the same time the flow-diverting auxiliary sheet guides the side of the flow-diverting sheet close to the first return spring to tilt toward the direction of the axis of the threaded rod, and then the side of the flow-diverting sheet away from the first return spring tilts toward the direction away from the axis of the threaded rod;

[0007] A blocking piece is also arranged in the adjusting groove, and the number of the blocking pieces is consistent with that of the diverter pieces. At the same time, the blocking pieces are arranged in a spiral shape along the thread line of the threaded rod, and each of the blocking pieces is arranged on the side of the diverter piece away from the first return spring. When the threaded rod rotates, the plastic exerts pressure on the diverter piece, so that the diverter piece and its connected diverter auxiliary piece, support piece and first return spring slide together along the adjusting groove toward the blocking piece until the diverter piece contacts the blocking piece.

[0008] Optionally, the blocking piece is provided with an inclined surface and a blocking groove on a side facing the diverter piece, and a plurality of second return springs are provided on a side of the blocking groove parallel to the side surface of the diverter piece.

[0009] Optionally, the outer shape of the diverter piece is an arc shape, and a plurality of connecting holes are provided between the inner arc surface and the outer arc surface of the diverter piece.

[0010] Optionally, a plurality of stirring blocks are arranged on the outer side surface of the threaded rod near the axis of the threaded rod, and the stirring blocks are arranged in a spiral shape along the thread line of the threaded rod, and the shape of the stirring blocks is wave-shaped.

[0011] Optionally, a discharge groove is provided at the stirring block, and two separation plates are provided inside the discharge groove. The separation plates are symmetrically arranged, and the separation plates are arc-shaped long strips. Unloading slide rails are provided at the opposite surfaces of the separation plates. The unloading slide rails of the two separation plates are slidably connected with unloading plates, and one end of the third return spring is provided on the side of the separation plate away from the other separation plate, and the other end of the third return spring is connected to the side of the discharge groove. When the threaded rod rotates, it drives the plastic to apply pressure to the unloading plate, and the unloading plate slides at the unloading slide rail, and then the unloading plate is controlled by the unloading plate to compress the third return spring.

[0012] Optionally, a plurality of inclined through holes are provided on the outer side surface of the threaded rod, and the inclined through holes are arranged in a linear array along the axis of the threaded rod.

[0013] Optionally, each of the deflector plates is commonly sleeved with a threaded connector, the axis of the threaded connector is consistent with the axis of the threaded rod, and the threaded connector is entirely embedded in the adjustment groove. When the threaded rod rotates to cause the plastic to apply pressure to the deflector plate, the threaded connector and the deflector plate and the deflector auxiliary plate, support plate and first return spring connected thereto can synchronously rotate within a certain range around the axis of the threaded rod. When the second return spring pushes the deflector plate, the threaded connector and the deflector plate and the deflector auxiliary plate, support plate and first return spring connected thereto can rotate as a whole.

[0014] Beneficial effects: 1. The flow-diverting piece of the present invention can act on the plastic transmitted in the threads of the threaded rod. Through the interaction between the flow-diverting piece and the plastic, the flow-diverting piece can mix the plastic flowing between the threads of the threaded rod. This method can reduce the part of the plastic that needs to be mixed during the injection molding process. Therefore, the length of the threaded rod can be shortened, which can effectively reduce the time consumed in the overall injection molding process and help the product to be quickly formed.

[0015] 2. The blocking piece and the second return spring of the present invention can help the mixing of the diverter piece to run smoothly, thereby reducing the occurrence of malfunctions caused by excessive pressure on the diverter piece.

[0016] 3. The stirring block of the present invention can cooperate with the diverter plate to simultaneously mix the partial area of ​​the thread of the threaded rod close to the axis of the threaded rod that cannot be affected by the diverter plate, thereby further improving the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of the present invention as a whole;

[0018] Figure 2 It is a connection schematic diagram of the adjustment slot of the present invention;

[0019] Figure 3 It is a schematic diagram of the connection of the stirring block of the present invention;

[0020] Figure 4 It is a connection diagram of the diverter plate of the present invention;

[0021] Figure 5 It is a connection schematic diagram of the threaded connector of the present invention.

[0022] In the figure: 1. threaded rod; 11. adjustment groove; 12. diverter plate; 121. connecting hole; 13. diverter auxiliary plate; 14. support plate; 15. first return spring; 16. inclined through hole; 2. blocking plate; 21. inclined surface; 22. blocking groove; 23. second return spring; 3. stirring block; 31. discharge groove; 32. separation plate; 33. unloading slide rail; 34. unloading plate; 35. third return spring; 4. threaded connector; 5. outer cylinder; 6. heating ring; 7. feed port; 8. spray port. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, a rapid prototyping device for injection molding products mainly includes a threaded rod 1, which is installed in an outer cylinder 5. A feed port 7 is connected to the side of the outer cylinder 5. A plurality of heating rings 6 are sleeved on the outer side of the outer cylinder 5. The heating rings 6 are arranged in a linear array along the axis of the outer cylinder 5. A spray port 8 is arranged at one end of the outer cylinder 5.

[0025] Threads are arranged on the surface of the threaded rod 1, and there are opposite sides between the threads. A plurality of inclined through holes 16 are arranged on the outer side of the threaded rod 1, and the inclined through holes 16 are arranged in a linear array along the axis of the threaded rod 1. Because the threads of the threaded rod 1 have more optimized structures such as diverter plates and stop plates than ordinary threaded rods, the shear heating effect brought by the threaded rod 1 will increase under normal circumstances. The arrangement of the inclined through holes 16 can correspondingly reduce the shear heating effect generated by the threaded rod 1, and can assist in the temperature balance of the plastic, preventing excessive temperature from changing the physical and chemical properties of the plastic.

[0026] A positioning groove 11 is provided on one side between the threads near the product forming area. The positioning groove 11 is provided along the rotation direction of the threaded rod 1. A plurality of flow-diverting plates 12 are provided inside the positioning groove 11. All the flow-diverting plates 12 are arranged in a spiral array according to the thread lines of the threaded rod 1. The flow-diverting plates 12 are in the shape of an arc-shaped plate body.

[0027] Two drainage grooves 31 are provided on the surface of the diverter plate 12. The inner arc surface and the outer arc surface of the diverter plate 12 are connected to the two ends of the drainage groove 31. When the diverter plate 12 guides the plastic to change the overall direction, the drainage groove 31 can help the plastic between the inner and outer arc surfaces of the diverter plate 12 to circulate to a certain extent, which can help the heat transfer to a certain extent and prevent the temperature difference of the plastic from increasing.

[0028] A diversion auxiliary piece 13 is provided on the side of the diversion piece 12 close to the axis of the threaded rod 1. The shape of the diversion auxiliary piece 13 is similar to that of the diversion piece 12. The outer arc surface of the diversion auxiliary piece 13 fits with the inner arc surface of the diversion piece 12. One end of a supporting piece 14 is hinged on the inner arc surface of the diversion auxiliary piece 13. The other end of the supporting piece 14 is movably connected to the adjustment groove 11. A first return spring 15 is provided on the side that is close to the diversion piece 12 and first contacts the plastic. When the threaded rod 1 rotates, one side of the diversion piece 12 is subjected to the pressure applied by the plastic. The diversion piece 12 will apply pressure to the first return spring 15 to squeeze it. At the same time, the diversion piece 12 will also squeeze the diversion auxiliary piece 13. Therefore, the pressure applied by the plastic and the diversion auxiliary piece 13 will help the diversion piece 12 to swing on the side away from the first return spring 15 toward the direction away from the threaded rod 1, that is, the tilted swing of the diversion piece 12 will be realized, helping the plastic to achieve diversion and mixing.

[0029] A blocking piece 2 is also arranged in the adjustment groove 11, and the number of the blocking pieces 2 is the same as that of the diverter pieces 12. At the same time, the blocking pieces 2 are arranged in a spiral shape along the thread line of the threaded rod 1, and each of the blocking pieces 2 is arranged on a side of the diverter piece 12 away from the first return spring 15;

[0030] When the threaded rod 1 rotates, the plastic will apply pressure to the diverter piece 12, and at the same time, the support piece 14 will move along the adjustment groove 11 toward the side away from the plastic entry end until one side of the diverter piece 12 contacts the inclined surface 21 of the blocking piece 2. As the support piece 14 is blocked by the blocking piece 2 and cannot move, the diverter piece 12 will produce the above-mentioned inclination, and then the diverter piece 12 will cross the inclined surface 21 and enter the blocking groove 22, thereby limiting the diverter piece 12, so that the plastic diversion continues to be maintained. A plurality of second return springs 23 are connected to the side of the blocking groove 22 facing the diverter piece 12. When the blocking piece 2 limits the diverter piece 12, the second return spring 23 is squeezed. When the plastic stops applying pressure to the diverter piece 12, the second return spring 23 will extend, generating a driving force on the diverter piece 12, so that the diverter piece 12 is away from the blocking piece 2. At the same time, the first return spring 15 will also extend to control the diverter piece 12 to be pushed out of the inclined state;

[0031] This can prevent the diverter piece 12 from experiencing a shunt failure due to increased force caused by the different specific plastic materials. At the same time, the second return spring 23 can effectively help the diverter piece 12 to recover, avoiding failure caused by continuous squeezing of the first return spring 15, and effectively extending the service life of the diverter piece 12.

[0032] like Figure 3 and Figure 4 As shown, a plurality of stirring blocks 3 are arranged on the outer side surface of the threaded rod 1 near the axis of the threaded rod 1. The stirring blocks 3 are arranged between the threads on the outer side of the threaded rod 1. The stirring blocks 3 are arranged spirally along the thread line of the threaded rod 1. The shape of the stirring blocks 3 is similar to the shape of waves. The shape of the stirring blocks 3 can imitate the shape of waves on the sea to exert pressure on objects. A drainage groove 31 is arranged at the stirring blocks 3. The drainage groove 31 is connected with the two side surfaces of the stirring blocks 3. According to the flow direction of the plastic in the drainage groove 31, two separation plates 32 are arranged inside the drainage groove 31. The separation plates 32 are symmetrically arranged. The separation plates 32 are arc-shaped strips. Unloading slide rails 33 are arranged on the opposite surfaces between the separation plates 32. Unloading plates 34 are slidably connected at the unloading slide rails 33 of the two separation plates 32. One end of a third return spring 35 is arranged on the side of the separation plate 32 away from the other separation plate 32, and the other end of the third return spring 35 is connected to the side of the drainage groove 31.

[0033] When the threaded rod 1 rotates, the stirring block 3 will perform corresponding plastic stirring on the area where the diverter plate 12 cannot act, helping to make the plastic more uniform, and the unloading plate 34 inside the stirring block 3 can move according to the magnitude of the force, thereby controlling the swing of the separation plate 32, and then achieving a certain circulation of the plastic on both sides of the stirring block 3 when the stress is large, preventing uneven temperature of the plastic and wear of the stirring block 3, which can effectively improve the life of the threaded rod 1 and stabilize the quality of the injection molded products.

[0034] like Figure 5 As shown, a threaded connector 4 is provided in the adjustment groove 11, and the axis of the threaded connector 4 is consistent with the axis of the threaded rod 1. At the same time, the threaded connector 4 can be embedded in the adjustment groove 11, and the portion of each diverter piece 12 in the adjustment groove 11 is sleeved with the threaded connector 4. When the threaded rod 1 rotates to make the plastic apply pressure to the diverter piece 12, the threaded connector 4 and the diverter piece 12 and the diverter auxiliary piece 13, the support piece 14 and the first return spring 15 connected thereto can synchronously rotate within a certain range around the axis of the threaded rod 1. When the second return spring 23 pushes the diverter piece 12, the threaded connector 4 and the diverter piece 12 and the diverter auxiliary piece 13, the support piece 14 and the first return spring 15 connected thereto can rotate as a whole.

[0035] The threaded connector 4 can be used to displace the entirety of the deflector pieces 12, thereby improving the overall performance of all deflector pieces 12 and preventing the deflector pieces 12 from being unable to exit the tilted state due to failure of some of the second return springs 23. This can increase the overall life of all deflector pieces 12 and reduce the frequency of failure of the first return spring 15.

[0036] First, the threaded rod 1 is installed as a whole into the outer cylinder 5, and the threaded rod 1 is rotated to heat the heating ring 6. After the temperature is heated, the plastic is input into the outer cylinder 5 along the feed port 7. Under the combined effect of the shear heating of the threaded rod 1 and the heating ring 6, the plastic begins to turn into liquid. After the plastic fills the gaps between the threads of the threaded rod 1, as the threaded rod 1 rotates, the plastic begins to flow along the threads of the threaded rod 1. When the plastic flows in the gaps between the threads, pressure is applied to the diverter plate 12. The threaded connector 4 and all the diverter plates 12, as well as the diverter auxiliary plate 13, the support plate 14 and the first reset spring 15 connected to the diverter plates 12 are displaced together until all the diverter plates 12 are in contact with the blocking plate 2, and the blocking plate 2 limits the diverter plates 12.

[0037] Afterwards, the plastic will exert pressure on the unloading plate 34 when passing through the stirring block 3. When the pressure is too large, the unloading plate 34 will be displaced, pushing the separation plate 32 to move until the two ends of the discharge flow groove 31 are connected, and some plastic will flow in the connecting hole 121 and the inclined through hole 16;

[0038] After that, the injection port 8 normally sprays out plastic for injection molding. After the injection molding is completed, the plastic stops flowing. After the plastic is cleared, the flow-diverting plate 12 will be pressurized by the second return spring 23 to break contact with the blocking plate 2. The third return spring 35 will also extend to push the separation plate 32 and the unloading plate 34 back to their original positions.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rapid injection molding equipment for injection molding products, characterized in that: The invention comprises a threaded rod (1), wherein the threaded rod (1) is arranged in an outer tube (5), one end of the outer tube (5) is provided with a material injection port (8), the outer side surface of the outer tube (5) is sleeved with a plurality of heating rings (6), the outer side of the outer tube (5) is provided with a material feed port (7) penetrating the outer side surface and the inner side surface of the outer tube (5), the surface of the threaded rod (1) is provided with a positioning groove (11) along the thread surface, a plurality of flow diversion plates (12) are connected in the positioning groove (11), the flow diversion plates (12) are arranged in a spiral shape along the thread line of the threaded rod (1), the side of the flow diversion plate (12) close to the axis of the threaded rod (1) is connected with a flow diversion auxiliary plate (13), the flow diversion auxiliary plate (13) is hinged to one end of a support plate (14), and the support plate (14) The other end is movably connected to the adjustment groove (11); a first return spring (15) is arranged on the side of the support plate (14); the two ends of the first return spring (15) are respectively connected to the adjustment groove (11) and the diversion auxiliary plate (13); the first return spring (15) is connected to the side of the support plate (14) closer to the plastic entry end; the threaded rod (1) drives the plastic to contact the diversion plate (12) by rotating, thereby compressing the first return spring (15); at the same time, the diversion auxiliary plate (13) guides the side of the diversion plate (12) close to the first return spring (15) to tilt toward the direction of the axis of the threaded rod (1), and then the side of the diversion plate (12) away from the first return spring (15) tilts toward the direction away from the axis of the threaded rod (1); A blocking piece (2) is also arranged in the adjustment groove (11). The number of the blocking pieces (2) is the same as that of the flow-displacing piece (12). The blocking pieces (2) are arranged in a spiral shape along the thread line of the threaded rod (1). Each blocking piece (2) is arranged on a side of the flow-displacing piece (12) away from the first return spring (15). When the threaded rod (1) rotates, the plastic exerts pressure on the flow-displacing piece (12), so that the flow-displacing piece (12) and the connected flow-displacing auxiliary piece (13), the support piece (14) and the first return spring (15) slide along the adjustment groove (11) toward the blocking piece (2) until the flow-displacing piece (12) contacts the blocking piece (2).

2. The rapid injection molding equipment for injection molded products according to claim 1, characterized in that: The blocking piece (2) is provided with an inclined surface (21) and a blocking groove (22) on the side facing the diverter piece (12), and a plurality of second return springs (23) are provided on a side of the blocking groove (22) parallel to the side of the diverter piece (12).

3. The rapid injection molding equipment for injection molded products according to claim 1, characterized in that: The outer shape of the flow-diverting piece (12) is an arc shape, and a plurality of communication holes (121) are provided between the inner arc surface and the outer arc surface of the flow-diverting piece (12).

4. The rapid injection molding equipment for injection molded products according to claim 1, characterized in that: A plurality of stirring blocks (3) are arranged on the outer side surface of the threaded rod (1) near the axis of the threaded rod (1); the stirring blocks (3) are arranged in a spiral shape along the thread line of the threaded rod (1); and the shape of the stirring blocks (3) is wave-shaped.

5. The rapid injection molding equipment for injection molded products according to claim 4, characterized in that: The stirring block (3) is provided with a discharge groove (31), and two separation plates (32) are provided inside the discharge groove (31). The separation plates (32) are symmetrically arranged, and the separation plates (32) are arc-shaped strips. Force unloading slide rails (33) are provided at the opposite surfaces of the separation plates (32). The force unloading slide rails (33) of the two separation plates (32) are slidably connected with a force unloading plate (34). One end of a third return spring (35) is provided on the side of the separation plate (32) away from the other separation plate (32), and the other end of the third return spring (35) is connected to the side of the discharge groove (31). When the threaded rod (1) rotates, it drives the plastic to apply pressure to the force unloading plate (34), and the force unloading plate (34) slides on the force unloading slide rail (33), and then controls the separation plate (32) to compress the third return spring (35) through the force unloading plate (34).

6. The rapid injection molding equipment for injection molded products according to claim 1, characterized in that: Each of the flow-diverting plates (12) is commonly sleeved with a threaded connector (4), the axis of the threaded connector (4) is consistent with the axis of the threaded rod (1), and the threaded connector (4) is integrally embedded in the adjustment groove (11). When the threaded rod (1) rotates to cause the plastic to apply pressure to the flow-diverting plate (12), the threaded connector (4) and the flow-diverting plate (12) and the flow-diverting auxiliary plate (13), the support plate (14) and the first return spring (15) connected thereto can synchronously rotate within a certain range around the axis of the threaded rod (1). When the second return spring (23) pushes the flow-diverting plate (12), the threaded connector (4) and the flow-diverting plate (12) and the flow-diverting auxiliary plate (13), the support plate (14) and the first return spring can rotate as a whole.

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