Injection molding machine for plastic part production

Abstract

The invention provides an injection molding machine for plastic part production, and relates to the technical field of automotive interiors, the injection molding machine comprises a U-shaped base, a mounting table is fixedly arranged at the top of the U-shaped base, four groups of supporting columns are fixedly arranged at the top of the mounting table, and a top injection molding bin is fixedly arranged at the tops of the supporting columns; an injection molding channel is fixedly arranged in the middle of the top injection molding bin; a sliding valve disc is fixedly arranged at the bottom of the injection molding channel, and a sliding valve element is slidably arranged in the sliding valve disc in a matched mode. A sealing plate is fixedly arranged at the bottom of the sliding valve disc. An injection molding head is fixedly arranged at the bottom of the sealing plate. The sliding valve element is arranged, a valve control structure capable of being automatically opened is provided, the lifting lead screw is driven to rotate, the movable injection molding opening makes contact with the injection molding head to be in matched butt joint, then the composite mold continues to rise, the top face of the composite mold makes contact with the spring rod to push the spring rod upwards, the injection molding head is not blocked by the sliding valve element any more, and injection molding is conducted; the problem that existing equipment lacks an automatic opening and closing valve is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile interior decoration, in particular to an injection molding machine for producing plastic parts. Background Art

[0002] Plastic parts for automotive interiors are mainly made by injection molding. Conventional injection molding equipment uses a mobile injection molding machine or mold to combine, and the injection port is controlled by a separate valve to open and close. The valve is opened for injection molding only when the injection head contacts the injection port of the mold.

[0003] The injection molding machines currently used have the following disadvantages: 1. Lack of valve control structure that can automatically expand during the injection molding process; 2. It is inconvenient to automatically separate the mold and guide the workpiece out during the reset process; 3. Lack of active demoulding structure to prevent mold jamming. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies in the above-mentioned prior art and provides an injection molding machine for producing plastic parts.

[0005] The present invention provides an injection molding machine for producing plastic parts, which specifically comprises: a U-shaped base, a mounting platform fixedly provided on the top of the U-shaped base, four groups of support columns fixedly provided on the top of the mounting platform, a top injection molding chamber fixedly provided on the top of the support columns; an injection molding channel fixedly provided in the middle of the top injection molding chamber; a sliding valve disc fixedly provided at the bottom of the injection molding chamber, a sliding valve core slidingly provided in the sliding valve disc; a sealing plate fixedly provided at the bottom of the sliding valve disc, an injection molding head fixedly provided at the bottom of the sealing plate; four groups of vertical guide rods fixedly provided between the mounting platform and the top injection molding chamber, the four groups of vertical guide rods sliding outwards A composite mold is movably provided; the main body of the composite mold is a top mold, and both sides of the composite mold are side plate structures that turn downward, and side guide rods are fixedly provided on the inner side of the composite mold; two groups of sliding side molds are slidably provided on the outside of the side guide rods on both sides, and the top of the sliding side mold coincides with the middle of the bottom of the composite mold; the outside of the side guide rods are sleeved with springs, and the two groups of sliding side molds are fitted together by the springs outside the side guide rods; an extension structure is integrally provided in the middle of the outer side of the composite mold, and an assembly wedge is fixedly provided on the outside and below the extension structure; docking holes are opened through the extension structure and the assembly wedge.

[0006] Optionally, a through hole for discharging materials is opened in the middle of the mounting platform, and an output channel is fixedly provided at the bottom of the through hole, and the output channel is inclined downward to the outside.

[0007] Optionally, two groups of trapezoidal trigger blocks are fixedly provided on both sides of the middle of the top of the mounting platform, and the assembly wedge block can contact the trapezoidal trigger block when it descends, and the assembly wedge block fits with the inclined surface of the trapezoidal trigger block.

[0008] Optionally, a screw propeller is rotatably arranged in the injection channel, an injection motor is fixedly arranged on the top of the injection channel, and the injection motor is transmission-connected to the screw propeller; two groups of trapezoidal buckets are connected on both sides of the injection channel, and the trapezoidal buckets are fitted and installed in the top injection molding bin, and the top of the trapezoidal buckets is flush with the top of the top injection molding bin; a heater is also provided between the outside of the injection channel and the top injection molding bin; the heater is cylindrical, and an insulation layer is provided outside the heater; two groups of positioning piles are fixedly arranged on the bottom of the top injection molding bin, and the bottom ends of the positioning piles are arc structures, and the positioning piles can be fitted and passed through the docking holes.

[0009] Optionally, four sets of supporting feet are integrally provided on the outside of the sliding valve core, and a spring rod is fixedly provided in the middle of each supporting foot. The upper end of the spring rod passes through the sliding valve disc, and the bottom of the spring rod passes through the sealing plate to sleeve the spring and install a baffle.

[0010] Optionally, two sets of lifting screws are rotatably arranged between the mounting platform and the top injection molding chamber, and the two sets of lifting screws are respectively threadedly connected to the two sides of the composite mold; a driving motor is fixedly arranged in the U-shaped base, and a bevel gear set is arranged at the bottom end of the driving motor and the two sets of lifting screws for transmission connection.

[0011] Optionally, a stepped through hole that is wider at the top and narrower at the bottom is provided in the middle of the composite mold, a movable injection port is slidably provided in the stepped through hole, the main body of the movable injection port is a T-shaped structure, and a spring is provided at the bottom of the movable injection port; an inner clamp is provided above the inside of the stepped through hole; and the injection head can fit in contact with the movable injection port when it descends.

[0012] Optionally, two groups of trigger pistons are fixedly provided at the bottom of the composite mold, a demoulding piston is fixedly provided inside the composite mold, and the telescopic end of the demoulding piston fits under the composite mold; the trigger piston and the demoulding piston are connected by a pipeline.

[0013] Optionally, two groups of trigger piles are fixedly provided on the top of the mounting platform, and when the trigger piston descends, the telescopic end of the trigger piston can contact the trigger piles.

[0014] The beneficial effects are as follows: 1. The present invention is provided with a sliding valve core and provides a valve control structure that can be opened automatically. It drives the lifting screw to rotate, stably raises the composite mold, and the movable injection port contacts the injection head for docking. Then the composite mold continues to rise, and the top surface of the composite mold contacts the spring rod to push the spring rod upward, driving the sliding valve core to rise. At this time, the sliding valve core no longer blocks the injection head, and the injection head can be used for injection molding. Otherwise, the injection molding can be automatically stopped, playing the role of a one-way valve.

[0015] 2. The present invention has an automatically separated mold structure. When the composite mold descends, the assembly wedge contacts the trapezoidal trigger block and automatically separates toward both sides through the guide, and then the sliding side molds on both sides separate. The contact restricts the workpiece, and the injection molded workpiece can fall naturally. Subsequent workpieces fall into the output channel and are guided for discharge. Therefore, a carrying container is set under the output channel to continuously collect workpieces, realizing fully automatic production.

[0016] 3. The present invention has an active demoulding function. To prevent the workpiece from sticking to the mold, the trigger piston continues to descend and contacts the trigger pile while the sliding side molds on both sides are separated, generating a thrust to shrink the trigger piston, inputting the air in the trigger piston into the demoulding piston, expanding the demoulding piston, pushing the workpiece downward to fall off, realizing automatic demoulding and ensuring the demoulding of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 shows a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It shows a schematic structural diagram of the injection molding state of an embodiment of the present invention; Figure 3 A schematic diagram of the demoulding structure of an embodiment of the present invention is shown; Figure 4 Shows an embodiment of the present invention Figure 1 A side structural diagram of Figure 5 Shows an embodiment of the present invention Figure 3 A structural diagram from another angle; Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of an injection molding channel according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the three-dimensional disassembled structure of a composite mold according to an embodiment of the present invention is shown; Figure 8 Shows an embodiment of the present invention Figure 7 Schematic diagram of the side tilt structure.

[0018] List of reference numerals: 1. U-shaped base; 101. Mounting table; 102. Support column; 103. Top injection chamber; 104. Output channel; 105. Trapezoidal trigger block; 106. Vertical guide rod; 107. Trigger pile; 108. Lifting screw; 109. Positioning pile; 2. Injection channel; 201. Screw propeller; 202. Injection motor; 203. Trapezoidal bucket; 204. Sliding valve disc; 205. Sliding valve core; 206. Spring rod; 3. Sealing plate; 301. Injection head; 4. Drive motor; 5. Heater; 6. Composite mold; 601. Movable injection port; 602. Side guide rod; 603. Sliding side mold; 604. Assembly wedge; 605. Docking hole; 606. Trigger piston; 607. Demolding piston. DETAILED DESCRIPTION

[0019] In order to make the purpose, solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0020] Example 1: Please refer to the accompanying drawings in the specification. Figures 1 to 8 As shown: The present invention proposes an injection molding machine for producing plastic parts, comprising: a U-shaped base 1, a mounting platform 101 is fixedly provided on the top of the U-shaped base 1, four groups of support columns 102 are fixedly provided on the top of the mounting platform 101, a top injection molding chamber 103 is fixedly provided on the top of the support columns 102; an injection molding channel 2 is fixedly provided in the middle of the top injection molding chamber 103; a sliding valve disc 204 is fixedly provided at the bottom of the injection molding channel 2, a sliding valve core 205 is slidingly provided in the sliding valve disc 204; a sealing plate 3 is fixedly provided at the bottom of the sliding valve disc 204, and an injection molding head 301 is fixedly provided at the bottom of the sealing plate 3; four groups of vertical guide rods 106 are fixedly provided between the mounting platform 101 and the top injection molding chamber 103, and the four groups of vertical guide rods A composite mold 6 is slidingly provided on the outside of 106; the main body of the composite mold 6 is a top mold, and both sides of the composite mold 6 are side plate structures that turn downward, and side guide rods 602 are fixedly provided on the inside of the composite mold 6; two groups of sliding side molds 603 are slidingly provided on the outside of the side guide rods 602 on both sides, and the top of the sliding side mold 603 coincides with the middle of the bottom of the composite mold 6; the outside of the side guide rods 602 are sleeved with springs, and the two groups of sliding side molds 603 are fitted together by the springs outside the side guide rods 602; an extension structure is integrally provided in the middle of the outside of the composite mold 6, and an assembly wedge 604 is fixedly provided on the outside and below the extension structure; a docking hole 605 is opened through the extension structure and the assembly wedge 604.

[0021] A through hole for discharging materials is provided in the middle of the mounting platform 101 , and an output channel 104 is fixedly provided at the bottom of the through hole, and the output channel 104 is inclined downward toward the outside.

[0022] Among them, two groups of trapezoidal trigger blocks 105 are fixedly set on both sides of the middle of the top of the mounting platform 101. When the assembly wedge block 604 descends, it can contact the trapezoidal trigger block 105, and the assembly wedge block 604 fits with the inclined surface of the trapezoidal trigger block 105.

[0023] Among them, a screw propeller 201 is rotatably arranged in the injection channel 2, and an injection motor 202 is fixedly arranged on the top of the injection channel 2, and the injection motor 202 is transmission-connected to the screw propeller 201; two groups of trapezoidal buckets 203 are connected on both sides of the injection channel 2, and the trapezoidal buckets 203 are fitted and installed in the top injection molding bin 103, and the top of the trapezoidal buckets 203 is flush with the top of the top injection molding bin 103; a heater 5 is also arranged between the outside of the injection channel 2 and the top injection molding bin 103; the heater 5 is cylindrical, and an insulation layer is arranged outside the heater 5; two groups of positioning piles 109 are fixedly arranged on the bottom of the top injection molding bin 103, and the bottom side of the positioning pile 109 is an arc structure, and the positioning pile 109 can be fitted and penetrated into the docking hole 605.

[0024] Among them, four groups of supporting feet are integrally provided on the outside of the sliding valve core 205, and a spring rod 206 is fixedly provided in the middle of the supporting feet. The upper end of the spring rod 206 passes through the sliding valve disc 204, and the bottom of the spring rod 206 passes through the sealing plate 3 to be sleeved with a spring and a baffle is installed; the spring rod 206 is connected to the sealing plate 3 and the sliding valve disc 204 by sliding, and a silicone sealing ring with a melting point higher than that of plastic can be used to maintain the sealing.

[0025] Among them, two sets of lifting screws 108 are rotatably arranged between the mounting platform 101 and the top injection molding chamber 103, and the two sets of lifting screws 108 are respectively threadedly connected to the two sides of the composite mold 6; a driving motor 4 is fixedly arranged in the U-shaped base 1, and a bevel gear group is set to transmit the driving motor 4 to the bottom end of the two sets of lifting screws 108.

[0026] Among them, a stepped through hole that is wide at the top and narrow at the bottom is opened in the middle of the composite mold 6, and a movable injection port 601 is slidably arranged in the stepped through hole. The main body of the movable injection port 601 is a T-shaped structure, and a spring is arranged at the bottom of the movable injection port 601; an inner clamp is arranged above the inside of the stepped through hole; when the injection head 301 descends, it can fit in contact with the movable injection port 601.

[0027] Among them, two groups of trigger pistons 606 are fixedly set at the bottom of the composite mold 6, and a demolding piston 607 is fixedly set inside the composite mold 6. The telescopic end of the demolding piston 607 fits under the composite mold 6; the trigger piston 606 and the demolding piston 607 are connected by a pipeline.

[0028] Two groups of trigger piles 107 are fixedly provided on the top of the mounting platform 101 . When the trigger piston 606 descends, the telescopic end of the trigger piston 606 can contact the trigger piles 107 .

[0029] like Figure 1-8 As shown, before production, the injection molding raw materials are put into the trapezoidal bucket 203 in advance, and the heater 5 is used to heat the injection channel 2 to melt the raw materials; during injection molding, the screw propeller 201 is driven to rotate by the injection motor 202 to provide thrust; The driving motor 4 is started to drive the lifting screw 108 to rotate, stably lifting the composite mold 6, and the movable injection port 601 contacts and docks with the injection head 301. Then, the composite mold 6 continues to rise, and the top surface of the composite mold 6 contacts the spring rod 206, pushing the spring rod 206 upward, driving the sliding valve core 205 to rise; At this time, the sliding valve core 205 no longer blocks the injection head 301, and the liquid flows through the side of the sliding valve core 205 into the injection head 301, and injection molding is performed using the injection head 301; micro exhaust grooves are set on the side of the composite mold 6 to ensure injection molding.

[0030] Example 2: Based on Example 1, after the injection molding is completed, the lifting screw 108 is reversed to lower the composite mold 6, and the movable injection port 601 is automatically reset by the spring; the sliding valve core 205 is automatically reset by the spring outside the spring rod 206, blocking the injection liquid; When the composite mold 6 descends, the assembly wedge 604 contacts the trapezoidal trigger block 105 and automatically separates toward both sides through the guide, and then the sliding side molds 603 on both sides separate, contacting the workpiece to limit the injection molded workpiece, and the injection molded workpiece can fall naturally; The shapes of the composite mold 6 and the sliding side mold 603 are made according to the shape of the workpiece and can be replaced and used as needed. The shape of the workpiece is a regular symmetrical structure and can be made; After demoulding, the workpiece falls into the output channel 104 and is guided out. A carrying container is provided below the output channel 104 to continuously collect the workpiece, thereby realizing fully automatic production.

[0031] Example 3: Based on Example 2, after the sliding side molds 603 on both sides are separated, part of the top of the workpiece may stick to or be stuck under the composite mold 6; Therefore, while the sliding side molds 603 on both sides are separated, the trigger piston 606 continues to descend and contacts the trigger pile 107, generating a thrust to cause the trigger piston 606 to contract, and input the air in the trigger piston 606 into the demolding piston 607, expanding the demolding piston 607 and pushing the workpiece downward to fall off, thereby achieving automatic demolding.

[0032] Specific usage and function of this embodiment: In the present invention, when in use, the injection molding raw material is put into the trapezoidal bucket 203, and the heater 5 is used to heat the injection channel 2 to melt the raw material; during injection molding, the injection motor 202 drives the screw propeller 201 to rotate to provide thrust; The driving motor 4 is started to drive the lifting screw 108 to rotate, stably raising the composite mold 6, bringing the movable injection port 601 into contact with the injection head 301 for docking, and then the composite mold 6 continues to rise, and the top surface of the composite mold 6 contacts the spring rod 206, pushing the spring rod 206 upward, driving the sliding valve core 205 to rise. At this time, the sliding valve core 205 no longer blocks the injection head 301, and the injection head 301 can be used for injection molding; after the injection molding is completed, the lifting screw 108 is reversed to lower the composite mold 6, and the movable injection port 601 is automatically reset by the spring; the sliding valve core 205 is automatically reset by the spring outside the spring rod 206, blocking the injection liquid; When the composite mold 6 descends, the assembly wedge 604 contacts the trapezoidal trigger block 105 and is automatically separated toward both sides through the guide. Then, the sliding side molds 603 on both sides separate, contacting the workpiece to restrict the injection molded workpiece, allowing it to fall naturally. However, the top of some workpieces sticks to or gets stuck under the composite mold 6. Therefore, during the period when the sliding side molds 603 on both sides separate, the trigger piston 606 continues to descend and contacts the trigger pile 107, generating a thrust to retract the trigger piston 606, and input the air in the trigger piston 606 into the demolding piston 607, which expands the demolding piston 607 and pushes the workpiece downward to fall off, achieving automatic demolding. After demoulding, the workpiece falls into the output channel 104 and is guided out. A carrying container is provided below the output channel 104 to continuously collect the workpiece, thereby realizing fully automatic production.

Claims

1. An injection molding machine for producing plastic parts, characterized in that: include: A U-shaped base (1), wherein a mounting platform (101) is fixedly provided on the top of the U-shaped base (1), four groups of support columns (102) are fixedly provided on the top of the mounting platform (101), and a top injection molding chamber (103) is fixedly provided on the top of the support columns (102); an injection molding channel (2) is fixedly provided in the middle of the top injection molding chamber (103); a sliding valve disc (204) is fixedly provided on the bottom of the injection molding channel (2), and a sliding valve core (205) is slidingly provided in the sliding valve disc (204); a sealing plate (3) is fixedly provided on the bottom of the sliding valve disc (204), and an injection molding head (301) is fixedly provided on the bottom of the sealing plate (3); four groups of vertical guide rods (106) are fixedly provided between the mounting platform (101) and the top injection molding chamber (103), and the four groups of vertical guide rods (106) slide outward. A composite mold (6) is provided; the main body of the composite mold (6) is a top mold, both sides of the composite mold (6) are side plate structures that are bent downward, and side guide rods (602) are fixedly provided on the inner side of the composite mold (6); two sets of sliding side molds (603) are slidingly provided on the outside of the side guide rods (602) on both sides, and the top of the sliding side mold (603) coincides with the middle of the bottom of the composite mold (6); the outside of the side guide rods (602) are sleeved with springs, and the two sets of sliding side molds (603) are attached and closed by the springs outside the side guide rods (602); an extension structure is integrally provided on the middle of the outer side of the composite mold (6), and an assembly wedge (604) is fixedly provided on the outside and below the extension structure; a docking hole (605) is opened through the extension structure and the assembly wedge (604).

2. An injection molding machine for producing plastic parts as claimed in claim 1, characterized in that: A through hole for discharging materials is provided in the middle of the mounting platform (101), and an output channel (104) is fixedly provided at the bottom of the through hole, and the output channel (104) is inclined downwardly toward the outside.

3. An injection molding machine for producing plastic parts according to claim 1, characterized in that: Two groups of trapezoidal trigger blocks (105) are fixedly arranged on both sides of the middle of the top of the mounting platform (101). When the assembly wedge block (604) descends, it can contact the trapezoidal trigger block (105), and the assembly wedge block (604) fits the inclined surface of the trapezoidal trigger block (105).

4. An injection molding machine for producing plastic parts as claimed in claim 1, characterized in that: A screw propeller (201) is rotatably provided in the injection channel (2), an injection motor (202) is fixedly provided at the top of the injection channel (2), and the injection motor (202) is transmission-connected to the screw propeller (201); two groups of trapezoidal buckets (203) are connected and provided on both sides of the injection channel (2), the trapezoidal buckets (203) are fitted in the top injection molding chamber (103), and the top of the trapezoidal buckets (203) is flush with the top of the top injection molding chamber (103); a heater (5) is further provided between the outside of the injection channel (2) and the top injection molding chamber (103); the heater (5) is cylindrical, and an insulation layer is provided outside the heater (5); two groups of positioning piles (109) are fixedly provided at the bottom of the top injection molding chamber (103), the bottom side of the positioning piles (109) is an arc structure, and the positioning piles (109) can be fitted and inserted into the docking hole (605).

5. An injection molding machine for producing plastic parts as claimed in claim 1, characterized in that: The sliding valve core (205) is integrally provided with four sets of supporting feet. A spring rod (206) is fixedly provided in the middle of each supporting foot. The upper end of the spring rod (206) passes through the sliding valve disc (204), and the bottom of the spring rod (206) passes through the sealing plate (3) to be sleeved with a spring and a baffle.

6. An injection molding machine for producing plastic parts according to claim 1, characterized in that: Two sets of lifting screws (108) are rotatably arranged between the mounting platform (101) and the top injection molding chamber (103), and the two sets of lifting screws (108) are respectively threadedly connected to the two sides of the composite mold (6); a driving motor (4) is fixedly arranged in the U-shaped base (1), and a bevel gear set is arranged at the bottom end of the driving motor (4) and is in transmission connection with the two sets of lifting screws (108).

7. An injection molding machine for producing plastic parts as claimed in claim 1, characterized in that: A stepped through hole that is wider at the top and narrower at the bottom is provided in the middle of the composite mold (6), a movable injection port (601) is slidably provided in the stepped through hole, the movable injection port (601) having a T-shaped main body, and a spring provided at the bottom of the movable injection port (601); an inner clamp is provided above the stepped through hole; and the injection head (301) is able to fit in contact with the movable injection port (601) when descending.

8. An injection molding machine for producing plastic parts as claimed in claim 1, characterized in that: Two groups of trigger pistons (606) are fixedly arranged at the bottom of the composite mold (6), and a demoulding piston (607) is fixedly arranged inside the composite mold (6). The telescopic end of the demoulding piston (607) fits under the composite mold (6); and a pipeline is provided to connect the trigger piston (606) and the demoulding piston (607).

9. An injection molding machine for producing plastic parts as claimed in claim 8, characterized in that: Two groups of trigger piles (107) are fixedly arranged on the top of the mounting platform (101), and when the trigger piston (606) descends, the telescopic end of the trigger piston (606) can contact the trigger piles (107).

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