Plastic mold and plastic injection molding process thereof

By designing a plastic mold including connecting frames, L-shaped rods, sliders and electric heating plates, the problem of uneven preheating of molds during injection molding is solved, and uniform preheating of molds of different sizes is achieved, ensuring the plastic molding effect and mold stability.

CN119820796AInactive Publication Date: 2025-04-15胡建生
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510180473.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-19
Publication Date
2025-04-15
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

During the plastic injection molding process, the temperature difference between the temperature in the mold and the plastic is large, resulting in poor plastic molding effect or deformation and damage of the mold. At the same time, molds of different sizes and specifications need to be uniformly preheated.

Method used

A plastic mold is designed, which includes a connecting frame, an L-shaped rod, a slider and an electric heating plate. Through the sliding cooperation of the slider and the L-shaped rod, the mold is uniformly preheated by the electric heating plate, and the adaptation of molds of different sizes and specifications is achieved through bolt connections.

Benefits of technology

It realizes uniform preheating of molds of different sizes and specifications, avoids poor plastic molding effect or mold deformation and damage, and expands the scope of application of the equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119820796A_ABST
    Figure CN119820796A_ABST
Patent Text Reader

Abstract

The invention belongs to the technical field of plastic molding, and particularly relates to a plastic mold and a plastic injection molding process thereof.The plastic mold comprises a connecting frame, a connecting plate is slidably connected to the connecting frame, an L-shaped rod is slidably connected to the connecting frame, a sliding block is slidably connected to the L-shaped rod, and an electric heating plate is fixedly connected to the sliding block; a plurality of connecting threaded holes are formed in the connecting frame and the connecting plate, the plastic mold further comprises a pressing rod connected to the connecting frame in a sliding mode, a rectangular plate is connected to the lower side of the pressing rod, the rectangular plate can push the L-shaped rod to slide, and a first compressed spring is fixedly connected between the L-shaped rod and the connecting frame. The technology comprises the following steps that firstly, by screwing bolts into a plurality of connecting threaded holes in a connecting frame and an L-shaped rod, two mold bodies which can be buckled with each other are connected to the connecting frame and the L-shaped rod correspondingly, the mold bodies of different sizes and specifications can be evenly preheated, and the finished product effect and the mold stability are guaranteed.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention belongs to the technical field of plastic molding, and in particular relates to a plastic mold and a plastic injection molding process thereof. Background Art

[0002] During plastic injection molding, the molten plastic is injected into the plastic mold, and then cooled and molded to form the finished plastic. The precautions in the plastic injection molding process involve raw materials and temperature control, process parameter adjustment, production process control, product quality testing, safety and environmental protection, etc. Only by fully considering and strictly implementing these precautions can the efficiency and stability of injection molding production be ensured;

[0003] Among them, during the injection molding process, if the plastic in a molten state is directly injected into the mold, the temperature difference between the temperature in the mold and the plastic is large, which may easily cause a sudden large temperature change of the plastic, which may lead to the plastic molding effect or deformation and damage of the mold. At the same time, due to different production requirements, the size of the mold is different, and therefore, equipment that can evenly preheat the mold bodies of different sizes is required. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a plastic mold and a plastic injection molding process thereof, which can uniformly preheat mold bodies of different sizes and specifications to ensure the finished product effect and mold stability.

[0005] A plastic mold comprises a connection frame, a connection plate slidably connected to the connection frame, an L-shaped rod slidably connected to the connection frame, a slider slidably connected to the L-shaped rod, an electric heating plate fixedly connected to the slider, and a plurality of connection threaded holes are provided on the connection frame and the connection plate.

[0006] It also includes a compression rod slidably connected to the connection frame, a rectangular plate is connected to the lower side of the compression rod, the rectangular plate can push the L-shaped rod to slide, and a first compression spring is fixed between the L-shaped rod and the connection frame.

[0007] It also includes a cylindrical rod connected to the slider, a sliding sleeve connected to the L-shaped rod, a transverse rod slidably connected to the sliding sleeve, the transverse rod can push the cylindrical rod to slide, and a second compression spring is fixed between the slider and the L-shaped rod.

[0008] It also includes a fixed seat, on which a rotating rod is rotatably connected, and the rotating rod can drive the cylindrical rod to move.

[0009] The sliding sleeve is slidably connected to the L-shaped rod.

[0010] The plastic mold is used in an injection molding process, and the process comprises the following steps:

[0011] Step 1: by screwing bolts into a plurality of connecting threaded holes on the connecting frame and the L-shaped rod, two mold bodies that can be interlocked are connected to the connecting frame and the L-shaped rod respectively;

[0012] Step 2: operate the connecting plate to slide on the connecting frame so that the two mold bodies are buckled with each other;

[0013] Step 3: Operate the L-shaped rod to slide up and down on the connecting frame;

[0014] Step 4: According to the actual size of the mold after fastening, operate the slider to slide back and forth on the L-shaped rod;

[0015] Step 5: Inject molten plastic into the mold and complete the processing after subsequent cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 is a structural diagram of a connection frame;

[0018] Figure 2 It is a schematic diagram of the structure of the L-shaped rod;

[0019] Figure 3 is a schematic diagram of the structure of the rack;

[0020] Figure 4 is a structural schematic diagram of the compression rod;

[0021] Figure 5 is a schematic diagram of the structure of the transverse rod;

[0022] Figure 6 is a schematic diagram of the structure of the rotating rod;

[0023] Figure 7 It is a structural schematic diagram of the slider;

[0024] Figure 8 and Fig. 9 It is a schematic diagram of the overall structure of a plastic mold. DETAILED DESCRIPTION

[0025] like Figure 1-2 and Figure 8 As shown:

[0026] The invention comprises a connection frame 101, a connection plate 102 is slidably connected to the connection frame 101, an L-shaped rod 201 is slidably connected to the connection frame 101, a slider 205 is slidably connected to the L-shaped rod 201, an electric heating plate 203 is fixedly connected to the slider 205, a plurality of connection threaded holes are provided on the connection frame 101 and the connection plate 102, and two molds that can be interlocked to form a plastic molding cavity can be respectively connected to the connection frame 101 and the connection plate 102 by screwing bolts into the plurality of connection threaded holes on the connection frame 101 and the L-shaped rod 201.

[0027] Before plastic injection molding, two mold bodies that can be buckled with each other are respectively connected to the connection frame 101 and the L-shaped rod 201 by screwing bolts into multiple connection threaded holes on the connection frame 101 and the L-shaped rod 201, and then the connection plate 102 is operated to slide on the connection frame 101 until the two molds are buckled, and then the molten plastic is injected into the plastic molding cavity formed between the two molds, so that the plastic enters the plastic molding cavity for molding, thereby completing the plastic injection molding effect;

[0028] Before injecting plastic, the electric heating plate 203 is first started to generate heat, and then the L-shaped rod 201 is operated to slide on the connecting frame 101, and then the heated electric heating plate 203 is used to preheat the outer side of the mold, so that the entire mold is gradually and evenly heated, and then the subsequent plastic injection is performed, that is, the mold is preheated before the injection operation, and then the entire mold is prevented from suddenly contacting with the hot molten plastic, causing a sudden large temperature change of the plastic, thereby affecting the plastic molding effect or causing deformation and damage to the mold;

[0029] When the electric heating plate 203 is used to preheat the outside of the mold, the slider 205 can be operated to slide on the L-shaped rod 201 according to the overall width of the two molds after being buckled, and then the L-shaped rod 201 can be coordinated with the up and down movement to further preheat the outside of the mold in a comprehensive and uniform manner, thereby achieving the goal of uniformly preheating mold bodies of different sizes and specifications, ensuring the plastic molding effect while expanding the scope of application of the equipment.

[0030] like Figure 4 As shown:

[0031] It also includes a pressure rod 103 slidably connected to the connecting frame 101, and a rectangular plate is connected to the lower side of 03, which can push the L-shaped rod 201 to slide, and a first compression spring is fixed between the L-shaped rod 201 and the connecting frame 101. A first electric push rod is fixed to the connecting frame 101, which can push the pressure rod 103 to slide, and the first compression spring can provide an upward elastic force to the L-shaped rod 201.

[0032] When it is necessary to operate the L-shaped rod 201 to move downward, the pressure rod 103 can be operated to slide downward, and then the rectangular plate can be used to push the L-shaped rod 201 downward, so that the L-shaped rod 201 overcomes the elastic force of the first compression spring and slides downward, so that the slider 205 drives the electric heating plate 203 to slide in the vertical direction, thereby achieving the effect of expanding the preheating range of the electric heating plate 203, facilitating comprehensive preheating of the outside of the mold, and ensuring the smooth progress of subsequent injection molding work.

[0033] like Figure 4 , Figure 5 and Figure 8 As shown:

[0034] It also includes a cylindrical rod 204 connected to the slider 205, a sliding sleeve 401 is connected to the L-shaped rod 201, a transverse rod 402 is slidably connected to the sliding sleeve 401, the transverse rod 402 can push the cylindrical rod 204 to slide, a second compression spring is fixed between the slider 205 and the L-shaped rod 201, a second electric push rod is fixed to the sliding sleeve 401, and the second compression spring can provide a leftward elastic force for the cylindrical rod 204.

[0035] When it is necessary to operate the slider 205 to move in the horizontal direction to achieve uniform heating of the plastic mold, the transverse rod 402 can be operated to slide on the sliding sleeve 401, and then the transverse rod 402 can be used to push the cylindrical rod 204, so that the slider 205 overcomes the elastic force of the second compression spring and slides on the L-shaped rod 201, thereby achieving the effect of changing the horizontal position of the electric heating plate 203, and further enabling the slider 205 to fully preheat the mold, bringing convenience to the subsequent processing process.

[0036] like Figure 5-8 As shown:

[0037] It also includes a fixed base 501, which is rotatably connected to a rotating rod 502, which can move the cylindrical rod 204, and an electromagnetic block that can adsorb and fix the slider 205 is fixed to the L-shaped rod 201, and a first motor that can drive the rotating rod 502 to rotate is fixed to the fixed base 501.

[0038] When the slider 205 needs to be operated to move in the vertical direction, if the power source driving the pressure rod 103 to slide fails, the electromagnetic block can be operated to adsorb and fix the slider 205, and then the rotating rod 502 can be rotated on the fixing seat 501, and then the cylindrical rod 204 can be moved by the rotating rotating rod 502. At this time, the L-shaped rod 201 will gradually receive a downward thrust, so that the L-shaped rod 201 can overcome the elastic force of the first compression spring and slide downward on the connecting frame 101, thereby achieving the effect of temporarily driving the L-shaped rod 201 to move downward, thereby ensuring the continuity of the processing effect;

[0039] If the power source driving the slider 205 to slide horizontally happens to fail when it is necessary to operate the slider 205 to slide horizontally, resulting in the slider 205 being unable to complete the horizontal movement, the rotating rod 502 can also be operated to rotate to use the rotating rod 502 to move the cylindrical rod 204, so that the rotating rod 502 moves the cylindrical rod 204. At this time, since the electromagnetic block is not in a state where it can adsorb the slider 205, as the rotating rod 502 continues to rotate, the rotating rod 502 will move the cylindrical rod 204, so that the slider 205 overcomes the elastic force of the second compression spring on the L-shaped rod 201 and slides, thereby achieving the effect of temporarily driving the slider 205 to move horizontally, further ensuring the processing continuity.

[0040] like Figure 5 As shown:

[0041] The sliding sleeve 401 is slidably connected to the L-shaped rod 201 , and a third electric push rod capable of pushing the sliding sleeve 401 to slide is fixedly connected to the L-shaped rod 201 .

[0042] When the rotating rotating rod 502 is used to drive the slider 205, the sleeve 401 can be operated to slide on the L-shaped rod 201, thereby moving the transverse rod 402 to a position offset from the cylindrical rod 204, so that the slider 205 can have a complete moving space, further ensuring the subsequent comprehensive preheating effect.

[0043] like Figure 5 As shown:

[0044] The rectangular plate is slidably connected to the pressure rod 103 , and a fourth electric push rod capable of pushing the rectangular plate to slide is fixedly connected to the pressure rod 103 .

[0045] When the rotating rotating rod 502 is used to realize the downward driving effect of the L-shaped rod 201, the rectangular plate can be operated to slide on the pressure rod 103, so that the rectangular plate and the L-shaped rod 201 are staggered, thereby removing the obstruction effect that the rectangular plate may cause to the movement of the L-shaped rod 201, so that the L-shaped rod 201 can have a complete moving space, which brings convenience to the subsequent comprehensive preheating effect.

[0046] like Figure 4-5 As shown:

[0047] It also includes a fixed sleeve 301, on which an oblique rod 302 is slidably connected, a third compression spring is fixedly connected between the fixed sleeve 301 and the oblique rod 302, a convex strip 206 is fixedly connected to the cylindrical rod 204, and the cylindrical rod 204 is rotatably connected to the slider 205, and the third compression spring can provide an upward elastic force to the oblique rod 302.

[0048] When the L-shaped rod 201 moves downward as a whole, the cylindrical rod 204 will naturally push the oblique rod 302 to slide on the fixing sleeve 301 to overcome the elastic force of the third compression spring, and then by monitoring the sliding of the oblique rod 302, it is possible to detect whether the L-shaped rod 201 moves downward normally, so as to timely discover the situation when the L-shaped rod 201 cannot move normally;

[0049] At the same time, the oblique rod 302 can be used to check whether the slider 205 can move horizontally. When the slider 205 slides on the L-shaped rod 201, the cylindrical rod 204 will continue to rotate on the slider 205 while following the sliding of the slider 205. When the cylindrical rod 204 rotates until the convex strip 206 on the cylindrical rod 204 contacts the oblique rod 302, the oblique rod 302 will slide on the fixed sleeve 301 to overcome the elastic force of the third compression spring. At the same time, when the slider 205 gradually moves, the cylindrical rod 204 can also gradually press the oblique rod 302 to slide downward. Then, by checking whether the oblique rod 302 will have a regular up and down sliding reset operation during the downward sliding process, the inspection operation of whether the slider 205 can slide horizontally can be completed, and it can be distinguished from the downward movement of the oblique rod 302 caused by the sliding of the L-shaped rod 201, thereby expanding the self-checking effect of the device.

[0050] A displacement sensor can be connected to the fixing sleeve 301 by tightening bolts on the fixing sleeve 301, and the moving end of the displacement sensor is fixedly connected to the oblique rod 302. Then, when the oblique rod 302 slides, the movement of the displacement sensor can be used to sense the situation in time, thereby achieving the inspection purpose.

[0051] like Figure 4 As shown:

[0052] It also includes a rack 202 fixedly connected to the L-shaped rod 201, a gear fixedly connected to the cylindrical rod 204, and the rack 202 meshes with the gear.

[0053] When the slider 205 slides, the rack 202 will automatically drive the gear, thereby driving the cylindrical rod 204 to rotate on the slider 205, so as to achieve the purpose of causing the convex strip 206 to regularly move the oblique rod 302 to slide.

[0054] like Figure 8-9 As shown:

[0055] The connection frame 101 and the fixing seat 501 are both provided with a plurality of fixing threaded holes.

[0056] The connection frame 101 and the fixing seat 501 can be fixed in a suitable position by screwing bolts into a plurality of fixing threaded holes, thereby fixing the entire device to facilitate stable subsequent processing.

[0057] The plastic mold is used in an injection molding process, and the process comprises the following steps:

[0058] Step 1: By screwing bolts into a plurality of connecting threaded holes on the connecting frame 101 and the L-shaped rod 201, two mold bodies that can be interlocked are connected to the connecting frame 101 and the L-shaped rod 201 respectively;

[0059] Step 2: operate the connecting plate 102 to slide on the connecting frame 101 so that the two mold bodies are buckled with each other;

[0060] Step 3: operate the L-shaped rod 201 to slide up and down on the connecting frame 101;

[0061] Step 4: operate the slider 205 to slide back and forth on the L-shaped rod 201 according to the actual size of the mold after buckling;

[0062] Step 5: Inject molten plastic into the mold and complete the processing after subsequent cooling.

Claims

1. A plastic mold, characterized in that: The invention comprises a connection frame (101), a connection plate (102) is slidably connected to the connection frame (101), an L-shaped rod (201) is slidably connected to the connection frame (101), a slider (205) is slidably connected to the L-shaped rod (201), an electric heating plate (203) is fixedly connected to the slider (205), and a plurality of connection threaded holes are provided on the connection frame (101) and the connection plate (102).

2. A plastic mold according to claim 1, characterized in that: It also includes a compression rod (103) slidably connected to the connection frame (101), a rectangular plate is connected to the lower side of the compression rod (103), the rectangular plate can push the L-shaped rod (201) to slide, and a first compression spring is fixedly connected between the L-shaped rod (201) and the connection frame (101).

3. A plastic mold according to claim 2, characterized in that: The invention also comprises a cylindrical rod (204) connected to the slider (205); a sliding sleeve (401) is connected to the L-shaped rod (201); a transverse rod (402) is slidably connected to the sliding sleeve (401); the transverse rod (402) can push the cylindrical rod (204) to slide; and a second compression spring is fixedly connected between the slider (205) and the L-shaped rod (201).

4. A plastic mold according to claim 3, characterized in that: It also includes a fixed seat (501), on which a rotating rod (502) is rotatably connected, and the rotating rod (502) can move the cylindrical rod (204).

5. A plastic mold according to claim 3, characterized in that: The sliding sleeve (401) is slidably connected to the L-shaped rod (201).

6. A plastic mold according to claim 5, characterized in that: The rectangular plate is slidably connected to the pressure rod (103).

7. A plastic mold according to claim 6, characterized in that: It also includes a fixed sleeve (301), the fixed sleeve (301) is slidably connected to an oblique rod (302), a third compression spring is fixedly connected between the fixed sleeve (301) and the oblique rod (302), a convex strip (206) is fixedly connected to the cylindrical rod (204), and the cylindrical rod (204) is rotatably connected to the slider (205).

8. A plastic mold according to claim 7, characterized in that: It also includes a rack (202) fixedly connected to the L-shaped rod (201), a gear fixedly connected to the cylindrical rod (204), and the rack (202) meshes with the gear.

9. A plastic mold according to claim 8, characterized in that: The connection frame (101) and the fixing seat (501) are both provided with a plurality of fixing threaded holes.

10. The injection molding process for injection molding according to claim 9, characterized in that The process includes the following steps: Step 1: by screwing bolts into a plurality of connecting threaded holes on the connecting frame (101) and the L-shaped rod (201), two mutually engageable mold bodies are connected to the connecting frame (101) and the L-shaped rod (201) respectively; Step 2: operate the connecting plate (102) to slide on the connecting frame (101) so that the two mold bodies are buckled with each other; Step 3: operate the L-shaped rod (201) to slide up and down on the connecting frame (101); Step 4: operating the slider (205) to slide back and forth on the L-shaped rod (201) according to the actual size of the mold after fastening; Step 5: Inject molten plastic into the mold and complete the processing after subsequent cooling.