Injection mold production heating device
By installing heating components and servo motor-controlled heating guide plates on the injection mold, the mold is directly heated, solving the problem of reduced plastic melt temperature and achieving uniform heating of the plastic inside the mold, thus ensuring product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN WEILICHUANG ELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-10
AI Technical Summary
In existing injection molds, the temperature decreases during the plastic melt delivery process, leading to increased viscosity and reduced fluidity. This makes it impossible to completely fill complex structures, resulting in missing material and defective edges in the finished product.
The heating component directly heats the injection mold. Heat is conducted through heating wires and a heat-conducting medium, and a servo motor controls the extension and retraction of the second heating guide plate to contact the mold surface, thus achieving direct heating of the mold and avoiding temperature drop.
It effectively maintains the mold temperature, prevents the viscosity of the plastic melt from increasing, ensures that the plastic completely fills the mold cavity, and avoids material shortages and edge defects in the product.
Smart Images
Figure CN224476531U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating devices, specifically a heating device for injection mold production. Background Technology
[0002] Injection mold heating devices are widely used in the production of various plastic products, including automotive parts, home appliances, medical devices, and packaging materials. They inject liquid plastic into a mold cavity that matches the shape of the part, and after it cools and solidifies, the plastic product is obtained. In the manufacturing process of plastic products, liquid needs to be injected into the mold through pipes.
[0003] However, in existing technologies, there are specialized injection molding machines for injection molding. Currently, the most commonly used plastic is polystyrene. In the existing plastic product manufacturing process, polystyrene granules need to be injected into a barrel. A resistance heating device is embedded in the barrel wall, and a screw is installed inside the barrel. By rotating the screw, the polystyrene granules are extruded. At the same time, the resistance heating device heats the inside of the barrel. Because the injection barrel is too long, the temperature of the plastic gradually decreases when the molten plastic is extruded and delivered into the mold cavity. When it reaches the mold cavity, the temperature drop will cause the viscosity of the plastic melt to increase and the fluidity to decrease significantly. It may not be able to completely fill the complex structure of the mold cavity, resulting in problems such as insufficient material and missing edges in the product. Utility Model Content
[0004] The purpose of this invention is to provide a heating device for injection mold production to solve the problems mentioned in the background art.
[0005] The objective of this utility model can be achieved through the following technical solutions:
[0006] A heating device for injection mold production includes an upper mold core and a lower mold core. A heating component is fixedly installed on one side of both the upper and lower mold cores. Each heating component includes two outer shells, and a recess is opened inside each of the two outer shells. A heating controller is fixedly installed at one end of each of the two recesses.
[0007] Preferably, a first heating guide plate is fixedly installed on the inner wall of the heating controller, and a heating wire is fixedly sleeved inside the plurality of first heating guide plates, with one end of the plurality of heating wires disposed on one side of the heating controller.
[0008] Preferably, the upper end of the outer shell is provided with guide grooves at both ends, and the upper end of the outer shell is provided with sliding grooves. The interior of each of the two guide grooves is slidably connected with a moving block. The upper end of each of the two moving blocks is fixedly connected with a moving rod. The lower end of each moving rod is equidistantly arranged and fixedly connected with connecting pieces. Multiple connecting pieces are slidably passed through the interior of the sliding grooves.
[0009] Preferably, each of the plurality of first heating guide plates has a slot inside, and each of the plurality of slots has a sliding groove at its upper and lower ends, and a second heating guide plate is slidably fitted inside each of the plurality of slots.
[0010] Preferably, each of the upper and lower ends of the plurality of second heating guide plates is fixedly connected to a sliding block, the plurality of sliding blocks are slidably connected inside the sliding groove, and the upper end of each of the plurality of sliding blocks is fixedly connected to a connecting piece.
[0011] Preferably, a push block is fixedly connected to one end of the top of the moving rod, a lead screw is rotatably connected inside the push block, a fixing plate is rotatably sleeved on one end of the lead screw, one side of the fixing plate is fixedly installed on one side of the outer shell, and a servo motor is fixedly connected to one side of the fixing plate. The output shaft of the servo motor is drivenly connected to one end of the lead screw.
[0012] The beneficial effects of this utility model are:
[0013] This invention utilizes a heating assembly. Current flows through a heating wire, which rapidly generates heat due to the thermal effect of the current. This heat is conducted through a first heating guide plate. Controlled by a servo motor, a second heating guide plate extends and retracts within the slot of the first heating guide plate. The second heating guide plate contacts the surfaces of the lower and upper mold cores, transferring heat from the first heating guide plate to the second heating guide plate, thereby heating the upper and lower mold cores of the injection mold. Compared to the traditional method of heating the plastic first in the injection barrel and then transferring heat to the injection mold, this direct heating method effectively avoids the problem of increased viscosity and decreased fluidity of the plastic melt due to temperature drop during its flow into the mold. This prevents defects such as insufficient material or missing edges in the product due to the plastic not completely filling the complex structure of the mold cavity. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the heating controller of this utility model;
[0017] Figure 3 This is a structural schematic diagram of the outer shell, guide groove, and slide groove of this utility model;
[0018] Figure 4 This is a structural schematic diagram of the disassembled heating component of this utility model.
[0019] The reference numerals in the figure are as follows: 1. Upper mold core; 2. Lower mold core; 3. Heating assembly; 31. Outer shell; 32. Heating controller; 33. Notch; 34. Guide groove; 35. Sliding groove; 36. First heating guide plate; 37. Heating wire; 38. Groove; 39. Sliding groove; 310. Second heating guide plate; 312. Sliding block; 313. Moving rod; 314. Pushing block; 315. Connecting piece; 316. Moving block; 317. Lead screw; 318. Fixing plate; 319. Servo motor. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0021] Please refer to Figure 1 and Figure 2 , Figure 4 As shown, a heating device for injection mold production includes an upper mold core 1 and a lower mold core 2. A heating component 3 is fixedly installed on one side of both the upper mold core 1 and the lower mold core 2. Each heating component 3 includes two outer shells 31. A recess 33 is opened inside the two outer shells 31. A heating controller 32 is fixedly installed at one end of each of the two recesses 33. A first heating guide plate 36 is fixedly installed on the inner wall of each heating controller 32. Heating wires 37 are fixedly sleeved inside the multiple first heating guide plates 36. One end of each of the multiple heating wires 37 is located on one side of the heating controller 32. The first heating guide plates 36 are made of copper alloy, thermally conductive ceramic or graphite.
[0022] In a specific embodiment, when the heating device is connected to the power supply, the current passes through the heating wire 37. Due to the thermal effect of the current, the heating wire 37 quickly generates heat. The heat generated by the heating wire 37 is conducted through the first heating guide plate 36. The first heating guide plate 36 serves as a heat conduction medium, which evenly distributes the heat. The heating controller 32 integrates temperature control elements such as thermocouples and temperature control chips, which monitor the temperature in real time and feed it back to the control system. By adjusting the current or on / off time of the heating wire 37, the temperature is maintained within the set range, ensuring the temperature stability of the upper mold core 1 and the lower mold core 2 of the injection mold.
[0023] For further details, please refer to Figure 3 and Figure 4As shown, the upper end of the outer shell 31 is provided with guide grooves 34 at both ends, and the upper end of the outer shell 31 is provided with sliding grooves 35. The interior of the two guide grooves 34 is slidably connected with moving blocks 316. The upper end of the two moving blocks 316 is fixedly connected with moving rods 313. The lower end of the moving rods 313 is equidistantly connected with connecting pieces 315. Multiple connecting pieces 315 are slidably passed through the interior of the sliding grooves 35. The interior of multiple first heating guide plates 36 is provided with slots 38. The upper and lower ends of multiple slots 38 are provided with sliding grooves 39. The interior of multiple slots 38 is slidably fitted with second heating guide plates 310.
[0024] For further details, please refer to Figure 3 and Figure 4 As shown, multiple second heating guide plates 310 are fixedly connected to the upper and lower ends of each sliding block 312. Multiple sliding blocks 312 are slidably connected inside the sliding groove 39. Multiple sliding blocks 312 are fixedly connected to the upper ends of each sliding block 315. A push block 314 is fixedly connected to one end of the top of the moving rod 313. A lead screw 317 is rotatably connected inside the push block 314. A fixing plate 318 is rotatably sleeved on one end of the lead screw 317. One side of the fixing plate 318 is fixedly installed on one side of the outer shell 31. A servo motor 319 is fixedly connected to one side of the fixing plate 318. The output shaft of the servo motor 319 is connected to one end of the lead screw 317 for transmission.
[0025] In a specific embodiment, when it is necessary to heat the upper mold core 1 and lower mold core 2 of the injection mold, when the servo motor 319 is not started, the second heating guide plate 310 is in a preset position in the slot 38 of the first heating guide plate 36. At this time, the heating area is the fixed area of the first heating guide plate 36. When the servo motor 319 is powered on, its output shaft drives the lead screw 317 to rotate. The thread on the outside of the lead screw 317 engages with the threaded hole in the push block 314. The push block 314 moves axially due to the rotation of the lead screw 317. When the push block 314 moves, the moving rod 313 fixed on its top slides synchronously in the guide groove 34. The connecting piece 315 at the lower end of the moving rod 313 passes through the slide groove 35 at the upper end of the outer shell 31. Due to the width of the slide groove 35 The connecting piece 315 is only allowed to slide up and down. Therefore, the connecting piece 315 moves horizontally within the slide groove 35 as the moving rod 313 moves. The lower end of the connecting piece 315 is fixedly connected to the sliding block 312. The sliding block 312 is embedded in the sliding groove 39 of the first heating guide plate 36. Therefore, the horizontal movement of the connecting piece 315 will drive the sliding block 312 to move within the sliding groove 39. The second heating guide plate 310 extends or retracts within the slot 38 along with the sliding block 312. By removing the second heating guide plate 310, the second heating guide plate 310 will further contact the surfaces of the lower mold core 2 and the upper mold core 1. The first heating guide plate 36 transfers heat to the second heating guide plate 310, thereby heating the upper mold core 1 and the lower mold core 2 of the injection mold.
[0026] In use, when the heating device is connected to a power source, current flows through the heating wire 37. Due to the thermal effect of the current, the heating wire 37 rapidly generates heat. The heat generated by the heating wire 37 is conducted through the first heating guide plate 36, which acts as a heat-conducting medium to evenly distribute the heat. The heating controller 32 integrates temperature control elements such as thermocouples and temperature control chips to monitor the temperature in real time and provide feedback to the control system. By adjusting the current or on / off time of the heating wire 37, the temperature is maintained within the set range. The servo motor 319 is powered on and operates, and its output shaft drives the lead screw 317 to rotate. The thread on the outside of the lead screw 317 engages with the threaded hole in the push block 314. The push block 314 moves axially due to the rotation of the lead screw 317. When the push block 314 moves, the moving rod 313 fixed on its top slides synchronously in the guide groove 34. The connecting piece 315 at the lower end of the moving rod 313 passes through the slide groove 35 at the upper end of the housing 31. Since the width of the slide groove 35 only allows the connecting piece 315 to slide up and down, the connecting piece 315 moves horizontally within the slide groove 35 as the moving rod 313 moves. The lower end of the connecting piece 315 is fixedly connected to the sliding block 312. The sliding block 312 is embedded in the slide groove 39 of the first heating guide plate 36. Therefore, the horizontal movement of the connecting piece 315 will drive the sliding block 312 to move within the slide groove 39. The second heating guide plate 310 extends or retracts within the slot 38 along with the sliding block 312. By removing the second heating guide plate 310, the second heating guide plate 310 will further contact the surfaces of the lower mold core 2 and the upper mold core 1. The first heating guide plate 36 transfers heat to the second heating guide plate 310, thereby heating the upper mold core 1 and the lower mold core 2 of the injection mold.
[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A heating device for injection mold production, characterized in that: It includes an upper mold core (1) and a lower mold core (2). A heating component (3) is fixedly installed on one side of both the upper mold core (1) and the lower mold core (2). The heating component (3) also includes two outer shells (31). A notch (33) is opened inside the two outer shells (31). A heating controller (32) is fixedly installed at one end of the two notches (33).
2. The injection mold production heating device according to claim 1, characterized in that: The inner wall of the heating controller (32) is fixedly installed with a first heating guide plate (36), and a heating wire (37) is fixedly sleeved inside the first heating guide plate (36). One end of the heating wire (37) is located on one side of the heating controller (32).
3. The injection mold production heating device according to claim 2, characterized in that: The upper end of the outer shell (31) is provided with guide grooves (34) at both ends. The upper end of the outer shell (31) is provided with sliding grooves (35). The two guide grooves (34) are slidably connected with moving blocks (316). The upper ends of the two moving blocks (316) are fixedly connected with moving rods (313). The lower ends of the moving rods (313) are equidistantly arranged and fixedly connected with connecting pieces (315). The multiple connecting pieces (315) are slidably passed through the sliding grooves (35).
4. The injection mold production heating device according to claim 2, characterized in that: Each of the first heating guide plates (36) has a slot (38) inside, and each of the slots (38) has a sliding groove (39) at the upper and lower ends. Each of the slots (38) has a second heating guide plate (310) slidably fitted inside.
5. The injection mold production heating device according to claim 4, characterized in that: Each of the second heating guide plates (310) has a sliding block (312) fixedly connected to its upper and lower ends. The sliding blocks (312) are slidably connected inside the sliding groove (39). Each of the upper ends of the sliding blocks (312) has a connecting piece (315) fixedly connected to its upper end.
6. The injection mold production heating device according to claim 3, characterized in that: A push block (314) is fixedly connected to one end of the top of the moving rod (313). A lead screw (317) is rotatably connected inside the push block (314). A fixing plate (318) is rotatably sleeved on one end of the lead screw (317). One side of the fixing plate (318) is fixedly installed on one side of the outer shell (31). A servo motor (319) is fixedly connected to one side of the fixing plate (318). The output shaft of the servo motor (319) is connected to one end of the lead screw (317) for transmission.