Vertical injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, and provides a vertical injection molding machine which comprises a working table, an upper mold and a lower mold, a first fixing plate is arranged on the working table, the lower mold is arranged at the top of the first fixing plate, guide rods are arranged at four corners of the first fixing plate, and the guide rods are fixedly connected with the working table. The upper die is arranged at the tops of the guide rods, the first fixing plate is in sliding connection with the guide rods, one end of each guide rod extends into the workbench and is in sliding connection with a fixing base, a plurality of pull rods are arranged at the top of the fixing base, and the pull rods abut against the bottom of the first fixing plate. And a lifting mechanism for enabling the fixed seat to drive the pull rod to close or open the lower die and the upper die is arranged in the workbench. According to the technical scheme, lateral movement or deviation of the upper die and the lower die is prevented, and the stability of product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, and specifically, to a vertical injection molding machine. Background Art

[0002] A vertical injection molding machine is a mechanical device commonly used in the production of plastic products. Its characteristic is a vertical structure, that is, the injection part and the mold are installed in the vertical direction. It injects plastic particles or powders into the mold through heating and pressure, and forms various plastic products after cooling, such as plastic parts, toys, upper stops of zippers, etc. The vertical injection molding machine is easy to operate and occupies a relatively small area, and is suitable for use in production sites with limited space.

[0003] The existing vertical injection molding machines usually drive the clamping of the upper mold and the lower mold through cylinders or hydraulic cylinders. However, the upper and lower molds of the vertical injection molding machine may experience lateral movement or offset during long-term use, resulting in uneven contact between the upper and lower molds, and reducing the stability of product quality. Summary of the Utility Model

[0004] The utility model provides a vertical injection molding machine, which prevents lateral movement or offset of the upper and lower molds and improves the stability of product quality.

[0005] The technical solution of the utility model is as follows: a vertical injection molding machine, including a workbench, an upper mold, and a lower mold. A first fixing plate is provided on the workbench, the lower mold is arranged on the top of the first fixing plate, guide rods are provided at the four corners of the first fixing plate, and the guide rods are fixedly connected to the workbench. The upper mold is arranged on the top of each guide rod, the first fixing plate is slidably connected to each guide rod, one end of each guide rod extends into the workbench and is slidably connected to a fixed seat, a plurality of pull rods are provided on the top of the fixed seat, and each pull rod abuts against the bottom of the first fixing plate. A lifting mechanism is arranged in the workbench to drive the fixed seat to drive the pull rods to clamp or open the lower mold and the upper mold.

[0006] Further, the lifting mechanism is driven by an electric device.

[0007] Further, threaded holes are provided at the top of each pull rod, and the first fixing plate is threadedly connected to the threaded holes at the top of each pull rod through a plurality of bolts.

[0008] Further, lubricating holes are provided at the four corners of the fixed seat and the first fixing plate, and lubricating sleeves are arranged in the lubricating holes. Each guide rod is slidably connected to the inner wall of the corresponding lubricating sleeve.

[0009] Further, the lifting mechanism includes a lead screw and a rotary motor. The lead screw is threadedly connected to the fixed seat, the rotary motor is arranged on one side inside the workbench, and the rotary motor is connected to the lead screw through a synchronous pulley group.

[0010] Furthermore, a bearing block is fixedly connected to the bottom of each of the guide rods. A bearing hole is provided in the bearing block. A first fixing ring is provided in the bearing hole. A second fixing ring is provided on the lead screw. A rolling bearing is provided in the bearing hole. The lead screw is fixedly connected to the inner ring of the rolling bearing. One side of the rolling bearing abuts against the first fixing ring, and the other side of the rolling bearing abuts against the second fixing ring.

[0011] Furthermore, a demolding mechanism is further included. The demolding mechanism includes a thimble and a moving plate. An accommodating space is provided inside the lower mold. The moving plate is arranged inside the accommodating space and is slidably connected to the inside of the accommodating space. One end of the thimble is fixedly connected to the moving plate, and the other end of the thimble extends to the inner wall of the cavity of the lower mold. Both sides of the moving plate extend to both sides of the lower mold and are fixedly connected with moving blocks. Sliding components for ejecting the product in the cavity by the thimble are provided on both sides of the upper mold.

[0012] Furthermore, the sliding component includes a mounting block, a clamping block, and an elastic member. The mounting blocks are arranged on both sides of the upper mold. A chute is provided on the mounting block, and the moving block is slidably connected to the chute. An accommodating groove is provided on one side of the chute. One end of the elastic member is fixedly connected to one side of the accommodating groove, and the other end of the elastic member is fixedly connected to the clamping block. The clamping block is slidably connected to the inner wall of the accommodating groove. The top of the moving block is in an arc-shaped structure. A clamping groove is provided on the side of the moving block away from the lower mold. A first inclined surface for slidably connecting with the clamping block is provided on the side of the clamping groove close to the upper mold. The side of the clamping block away from the elastic member is in an arc-shaped structure.

[0013] Furthermore, limiting grooves are provided on both sides of the lower mold. A sliding rod is fixedly connected in the limiting groove, and the moving plate is slidably connected to the sliding rod. A limiting ring is fixedly connected to the sliding rod.

[0014] The working principle and beneficial effects of the present utility model are as follows:

[0015] When an operator starts the lifting mechanism, the lifting mechanism will drive the fixed seat to move upward. The fixed seat will push the pull rod to make the first fixing plate rise along the guide rod, so that the lower mold and the upper mold are closed. After injection molding is completed, start the lifting mechanism again to move the fixed seat downward along the guide rod. At this time, the pull rod will move downward, and at the same time, the first fixing plate will also move downward, so that the lower mold and the upper mold are separated. Connecting the fixed seat and the guide rod in a sliding manner can ensure that the fixed seat can only move along the axial direction of the guide rod, preventing the lower mold from deviating or being misaligned during the movement, thereby improving the stability of the overall structure and the stability of the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0017] Figure 1 It is a schematic structural diagram of the first embodiment;

[0018] Figure 2 It is a schematic diagram of the partial structure decomposition of the first embodiment;

[0019] Figure 3 is Figure 2 an enlarged schematic diagram of part A in;

[0020] Figure 4 It is a schematic diagram of the internal structure of the workbench in the first embodiment Figure 1 ;

[0021] Figure 5 is Figure 4 an enlarged schematic diagram of part B in;

[0022] Figure 6 It is a schematic diagram of the internal structure of the workbench in the first embodiment Figure 2 ;

[0023] Figure 7 It is a schematic diagram of the decomposition structure of the fixed seat, lead screw, and bearing seat in the first embodiment;

[0024] Figure 8 is Figure 7 an enlarged schematic diagram of part C in;

[0025] Figure 9 It is a schematic structural diagram of the second embodiment;

[0026] Figure 10 is Figure 9 an enlarged schematic diagram of part D in;

[0027] Figure 11 is Figure 10 a partial structural cross-sectional schematic diagram of;

[0028] Figure 12 is Figure 11 an enlarged schematic diagram of part E in;

[0029] Figure 13 It is a cross-sectional schematic diagram of the first fixing plate and the lower mold in the second embodiment.

[0030] In the figure: 1. Workbench; 101. Upper die; 1011. Second fixing plate; 102. Lower die; 103. First fixing plate; 104. Guide rod; 1041. Fixed block; 105. Fixed seat; 1051. Connecting seat; 106. Pull rod; 1061. Threaded hole; 1062. Bolt; 107. Lubricating hole; 1071. Lubricating sleeve; 108. Lead screw; 109. Rotary motor; 1091. First synchronous pulley; 1092. Second synchronous pulley; 1093. Synchronous belt; 110. Bearing seat; 111. Bearing hole; 1112. First fixing ring; 1123. Second fixing ring; 1124. Rolling bearing; 2. Thimble; 201. Moving plate; 202. Moving block; 203. Accommodating space; 3. Mounting block; 301. Block; 302. Elastic member; 303. Chute; 304. Accommodating groove; 305. Card slot; 306. First inclined surface; 307. Limit groove; 308. Sliding rod; 309. Limit ring. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1:

[0033] Refer to Figures 1-8 , a vertical injection molding machine, including a workbench 1, an upper die 101, and a lower die 102. A first fixing plate 103 is provided on the workbench 1 (the first fixing plate 103 is composed of two plates, and the two plates can be connected by bolts). The lower die 102 is arranged on the top of the first fixing plate 103. Guide rods 104 are provided at the four corners of the first fixing plate 103, and the guide rods 104 are fixedly connected to the workbench 1. Fixed blocks 1041 are fixedly connected to the respective guide rods 104, and the fixed blocks 1041 are fixedly connected to the inside of the workbench 1 through a plurality of bolts 1062.

[0034] The upper mold 101 is arranged at the top of each of the guide rods 104. A second fixing plate 1011 is provided at the top of each guide rod 104, and the second fixing plate 1011 is fixedly connected to each guide rod 104. The upper mold 101 is arranged on the side of the second fixing plate 1011 close to the lower mold 102. The first fixing plate 103 is slidably connected to each guide rod 104. One end of each guide rod 104 extends into the workbench 1 and is slidably connected to a fixing seat 105. A plurality of pull rods 106 are provided on the top of the fixing seat 105, and each pull rod 106 abuts against the bottom of the first fixing plate 103. A lifting mechanism for driving the fixing seat 105 to drive the pull rods 106 to close or open the lower mold 102 and the upper mold 101 is arranged in the workbench 1, and the lifting mechanism is driven by an electric device (the electric device can be an electric push rod, a rotary motor or other devices relying on electric drive).

[0035] When the operator starts the lifting mechanism, the lifting mechanism will drive the fixing seat 105 to move upward. The fixing seat 105 will push the pull rods 106 to make the first fixing plate 103 rise along the guide rods 104, so that the lower mold 102 and the upper mold 101 are closed. After the injection molding is completed, start the lifting mechanism again to move the fixing seat 105 downward along the guide rods 104. At this time, the pull rods 106 will move downward, and at the same time, the first fixing plate 103 will also move downward, so that the lower mold 102 and the upper mold 101 are separated. By setting an electrically driven lifting mechanism, it is not necessary to use hydraulic oil or compressed air, thereby reducing energy consumption and costs. In addition, the sliding connection between the fixing seat 105 and the guide rods 104 can ensure that the fixing seat 105 can only move along the axial direction of the guide rods 104, preventing it from deviating or being misaligned during the movement, thereby improving the stability of the overall structure and the stability of the product quality.

[0036] Specifically, the lifting mechanism includes a lead screw 108 and a rotating motor 109. The lead screw 108 is threadedly connected to the fixed seat 105 (it should be noted that a connecting seat 1051 can be provided on the fixed seat 105. The connecting seat 1051 can be fixedly connected to the fixed seat 105 through a number of bolts 1062, and the lead screw 108 can be threadedly connected to the connecting seat 1051. In this way, when the threaded connection between the connecting seat 1051 and the lead screw 108 wears and needs to be replaced, only the connecting seat 1051 needs to be replaced, rather than the entire fixed seat 105, thus reducing the maintenance cost). The rotating motor 109 is arranged on one side inside the workbench 1 and fixedly connected to the workbench 1 to prevent self-rotation during its operation. The rotating motor 109 is connected to the lead screw 108 through a synchronous pulley set. The synchronous pulley set includes a first synchronous pulley 1091 and a second synchronous pulley 1092. The first synchronous pulley 1091 is arranged on the output end of the rotating motor 109 and fixedly connected. The second synchronous pulley 1092 is arranged on the lead screw 108 and fixedly connected to the lead screw 108. The first synchronous pulley 1091 and the second synchronous pulley 1092 are connected by a synchronous belt 1093. The synchronous pulley set drive is usually relatively stable, which can reduce noise and vibration during the movement process and ensure the stability of the equipment operation. Secondly, the lead screw 108 can provide precise motion control, which helps to ensure the continuous and stable operation of the mold during the mold closing and opening processes and reduce product defects caused by unstable transmission.

[0037] Threaded holes 1061 are provided at the tops of the respective tie rods 106. The first fixing plate 103 is threadedly connected to the threaded holes 1061 at the tops of the respective tie rods 106 through a number of bolts 1062. By connecting the tie rods 106 and the first fixing plate 103 together through the bolts 1062, it can be ensured that when the tie rods 106 move downward, the first fixing plate 103 will move downward together under the action of the number of bolts 1062 (the threaded connection has self-locking property, so the first fixing plate 103 will move along with the tie rods 106), improving the accuracy and stability of the movement of the first fixing plate 103. At the same time, it also facilitates the staff to replace the first fixing plate 103.

[0038] Furthermore, lubrication holes 107 are provided at the four corners of the fixed seat 105 and the first fixing plate 103, and lubrication sleeves 1071 are provided in the lubrication holes 107. The respective guide rods 104 are slidably connected to the inner walls of the corresponding lubrication sleeves 1071. The operator can regularly add lubricating oil into the lubrication sleeves 1071, which can reduce the friction between the guide rods 104 and the fixed seat 105 and the first fixing plate 103, thereby extending the service life of the guide rods 104 and the fixed seat 105, reducing wear. At the same time, it can make the movement between the fixed seat 105, the first fixing plate 103 and the guide rods 104 smoother and more precise, ensuring the stability and accuracy of their movement.

[0039] In this embodiment, a bearing seat 110 is fixedly connected to the bottom of each guide rod 104. A bearing hole 111 is provided in the bearing seat 110. A first fixing ring 1112 is provided in the bearing hole 111. A second fixing ring 1123 is provided on the lead screw 108. A rolling bearing 1124 is provided in the bearing hole 111. The rolling bearing 1124 can be a deep groove ball bearing, which can withstand large radial and axial loads. The lead screw 108 is fixedly connected to the inner ring of the rolling bearing 1124 (the part where the lead screw 108 is connected to the rolling bearing 1124 has no threaded section). One side of the rolling bearing 1124 abuts against the first fixing ring 1112, and the other side of the rolling bearing 1124 abuts against the second fixing ring 1123. By providing the bearing seat 110, an installation position can be provided for the lead screw 108, which is convenient for the operator to install the lead screw 108.

[0040] Working principle:

[0041] When the staff needs to perform injection molding, the rotation motor 109 can be started to rotate forward. The output end of the rotation motor 109 drives the first synchronous pulley 1091 to rotate. The first synchronous pulley 1091 drives the second synchronous pulley 1092 to rotate through the synchronous belt 1093, and the second synchronous pulley 1092 drives the lead screw 108 to rotate. When the lead screw 108 rotates, the fixed seat 105 moves upward along with the movement of the lead screw 108, and the first fixing plate 103 is pushed along the guide rod 104 by the push rod 106, so as to realize the mold closing of the lower mold 102 and the upper mold 101. After the injection molding is completed, the rotation motor 109 rotates in reverse, driving the lead screw 108 to rotate in reverse. The fixed seat 105 moves downward along with the movement of the lead screw 108, and at the same time the push rod 106 also drives the first fixing plate 103 to move downward, so that the lower mold 102 and the upper mold 101 are separated.

[0042] Embodiment Two:

[0043] On the basis of Embodiment One, this embodiment also proposes a demolding mechanism. Refer to Figures 9-13 , the demolding mechanism includes a ejector pin 2 and a moving plate 201. An accommodating space 203 is provided inside the lower mold 102. The moving plate 201 is arranged inside the accommodating space 203 and is slidably connected to the inside of the accommodating space 203. One end of the ejector pin 2 is fixedly connected to the moving plate 201, and the other end of the ejector pin 2 extends to the inner wall of the cavity of the lower mold 102. Both sides of the moving plate 201 extend to both sides of the lower mold 102 and are fixedly connected with moving blocks 202. Sliding components for the ejector pin 2 to eject the product in the cavity are provided on both sides of the upper mold 101.

[0044] When the lower mold 102 and the upper mold 101 are separated, the ejector pin 2 will automatically eject the product in the cavity under the drive of the sliding component, thus realizing automatic demolding. In addition, the demolding mechanism in this embodiment does not require an additional driving source, which means that no electric energy or other energy is consumed during the automatic demolding process, thereby reducing the energy cost in the production process.

[0045] Specifically, the sliding component includes a mounting block 3, a clamping block 301, and an elastic member 302. The elastic member 302 can be a cylindrical compression spring. The mounting blocks 3 are arranged on both sides of the upper mold 101. The mounting block 3 is provided with a sliding groove 303, and the moving block 202 is slidably connected to the sliding groove 303. A receiving groove 304 is provided on one side of the sliding groove 303. One end of the elastic member 302 is fixedly connected to one side of the receiving groove 304, and the other end of the elastic member 302 is fixedly connected to the clamping block 301. The clamping block 301 is slidably connected to the inner wall of the receiving groove 304. The sliding connection of the clamping block 301 to the inner wall of the receiving groove 304 can prevent the clamping block 301 from shifting or misaligning during movement, thereby improving the stability of the movement of the clamping block 301. At the same time, it can ensure that the elastic member 302 is uniformly stressed and improve the service life of the elastic member 302.

[0046] The top of the moving block 202 has an arc-shaped structure. A clamping groove 305 is provided on the side of the moving block 202 away from the lower mold 102. A first inclined surface 306 slidably connected to the clamping block 301 is provided on the side of the clamping groove 305 close to the upper mold 101. The side of the clamping block 301 away from the elastic member 302 has an arc-shaped structure.

[0047] Furthermore, limiting grooves 307 are provided on both sides of the lower mold 102, and sliding rods 308 are fixedly connected in the limiting grooves 307. The moving plate 201 is slidably connected to the sliding rods 308. A limiting ring 309 is fixedly connected to the sliding rod 308. By providing the sliding rods 308, the degree of freedom of the moving plate 201 can be restricted, so that the moving plate 201 can only move along the axis direction of the sliding rod 308, preventing it from shifting during movement and improving the stability of the movement of the moving plate 201 (a sliding rod 308 can be further provided inside the limiting groove 307. A threaded section is provided on the outer surface of the sliding rod 308, and the limiting ring 309 is connected to the thread of the sliding rod. The sliding rod 308 with the threaded section does not contact the moving plate 201, while the limiting ring 309 can contact the surface of the moving plate 201. By rotating the limiting ring 309, its height on the sliding rod 308 can be controlled, thereby controlling the moving height of the ejector pin 2).

[0048] Working principle:

[0049] When the lower mold 102 moves upward and is clamped with the upper mold 101, the arc-shaped side at the top of the moving block 202 extends into the sliding groove 303 and presses the clamping block 301, and the clamping block 301 then moves in the direction of compressing the elastic member 302, causing it to enter the accommodating groove 304. When the lower mold 102 and the upper mold 101 are completely closed, the clamping block 301 is snapped into the clamping groove 305 under the action of the elastic member 302. When the upper mold 101 and the lower mold 102 are separated, since the clamping block 301 is clamped with the clamping groove 305 under the action of the elastic member 302, the moving block 202 cannot descend, so that the moving plate 201 cannot descend either, and further the ejector pin 2 cannot descend. However, the lower mold 102 is still in the process of descending, so the ejector pin 2 will eject the product in the cavity. When the limiting ring 309 contacts the moving plate 201, the limiting ring 309 drives the moving plate 201 to descend, and at the same time drives the moving block 202 to descend. At this time, the first inclined surface 306 of the clamping groove 305 will press the clamping block 301, push it in the direction of compressing the elastic member 302, and cause it to gradually retract. When the moving block 202 completely disengages from the sliding groove 303, the ejector pin 2 automatically resets under the action of gravity, completing the demolding work.

[0050] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vertical injection molding machine, comprising a workbench (1), an upper mold (101), and a lower mold (102), characterized in that, A first fixed plate (103) is provided on the workbench (1). The lower die (102) is arranged on the top of the workbench (1). Guide rods (104) are provided at the four corners of the first fixed plate (103), and the guide rods (104) are fixedly connected to the workbench (1). The upper die (101) is arranged on the top of each of the guide rods (104). The first fixed plate (103) is slidably connected to each of the guide rods (104). One end of each of the guide rods (104) extends into the workbench (1) and is slidably connected to a fixed seat (105). A plurality of pull rods (106) are provided on the top of the fixed seat (105), and each of the pull rods (106) abuts against the bottom of the first fixed plate (103). A lifting mechanism for enabling the fixed seat (105) to drive the pull rods (106) to close or open the lower die (102) and the upper die (101) is provided in the workbench (1).

2. The vertical injection molding machine according to claim 1, wherein: The lifting mechanism is driven by an electric device.

3. The vertical injection molding machine according to claim 1, characterized in that: Threaded holes (1061) are provided at the top of each of the pull rods (106). The first fixed plate (103) is threadedly connected to the threaded holes (1061) at the top of each of the pull rods (106) through a plurality of bolts (1062).

4. The vertical injection molding machine according to claim 1, characterized in that: Lubrication holes (107) are provided at the four corners of the fixed seat (105) and the first fixed plate (103), and lubrication sleeves (1071) are provided in the lubrication holes (107). Each of the guide rods (104) is slidably connected to the inner wall of the corresponding lubrication sleeve (1071).

5. The vertical injection molding machine according to claim 2, wherein: The lifting mechanism includes a lead screw (108) and a rotary motor (109). The lead screw (108) is threadedly connected to the fixed seat (105). The rotary motor (109) is arranged on one side inside the workbench (1), and the rotary motor (109) is connected to the lead screw (108) through a synchronous pulley set.

6. The vertical injection molding machine according to claim 5, characterized in that: A bearing seat (110) is fixedly connected to the bottom of each of the guide rods (104). A bearing hole (111) is provided in the bearing seat (110). A first fixing ring (1112) is provided in the bearing hole (111). A second fixing ring (1123) is provided on the lead screw (108). A rolling bearing (1124) is provided in the bearing hole (111). The lead screw (108) is fixedly connected to the inner ring of the rolling bearing (1124). One side of the rolling bearing (1124) abuts against the first fixing ring (1112), and the other side of the rolling bearing (1124) abuts against the second fixing ring (1123).

7. A vertical injection molding machine according to claim 1, characterized in that: It further includes a demolding mechanism, and the demolding mechanism includes a ejector pin (2) and a moving plate (201). An accommodating space (203) is provided inside the lower mold (102). The moving plate (201) is arranged inside the accommodating space (203) and is slidably connected to the inside of the accommodating space (203). One end of the ejector pin (2) is fixedly connected to the moving plate (201), and the other end of the ejector pin (2) extends to the inner wall of the cavity of the lower mold (102). Both sides of the moving plate (201) extend to both sides of the lower mold (102) and are fixedly connected with moving blocks (202). Sliding components for the ejector pin (2) to eject the product in the cavity are provided on both sides of the upper mold (101).

8. A vertical injection molding machine according to claim 7, characterized in that: The sliding components include mounting blocks (3), clamping blocks (301), and elastic members (302). The mounting blocks (3) are arranged on both sides of the upper mold (101). A chute (303) is provided on the mounting block (3), and the moving block (202) is slidably connected to the chute (303). An accommodating groove (304) is provided on one side of the chute (303). One end of the elastic member (302) is fixedly connected to one side of the accommodating groove (304), and the other end of the elastic member (302) is fixedly connected to the clamping block (301). The clamping block (301) is slidably connected to the inner wall of the accommodating groove (304). The top of the moving block (202) is in an arc-shaped structure. A clamping groove (305) is provided on the side of the moving block (202) away from the lower mold (102). A first inclined surface (306) for slidably connecting with the clamping block (301) is provided on the side of the clamping groove (305) close to the upper mold (101). The side of the clamping block (301) away from the elastic member (302) is in an arc-shaped structure.

9. An upright injection molding machine according to claim 7, characterized in that: Limit grooves (307) are provided on both sides of the lower mold (102). A sliding rod (308) is fixedly connected inside the limit grooves (307), and the moving plate (201) is slidably connected to the sliding rod (308). A limit ring (309) is fixedly connected to the sliding rod (308).

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