Multifunctional convenient demolding type automobile interior precise injection molding integrated forming device

Abstract

The invention discloses a multifunctional convenient demolding type automobile interior precise injection molding integrated forming device, and relates to the technical field of injection molds, the multifunctional convenient demolding type automobile interior precise injection molding integrated forming device comprises a base, a workbench is arranged on the upper surface of the base, a supporting frame is arranged on the upper surface of the workbench, and a slidable sliding door is arranged on the surface of the supporting frame; a demolding mechanism is arranged at the center of the supporting frame and comprises a vibration assembly and a mold assembly, the mold assembly comprises a fixed forming block, positioning blocks are arranged on the upper surface and the lower surface of the fixed forming block, a fixed mold is further arranged on the surface of one side of the fixed forming block, the vibration assembly comprises a storage box body, and a storage inner box is further arranged in the storage box body; and two top contact strip blocks are arranged on the surface of one side of the storage inner box, small motors are arranged on the surfaces of the two sides of the storage inner box, and in the scheme, through the demolding mechanism, the demolding efficiency and the product quality are improved, and the continuity and stability of production are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a multifunctional, convenient mold-removing, precision injection molding integrated molding device for automobile interiors. Background Art

[0002] With the vigorous development of the automobile industry, consumers' demands for the quality, aesthetics and personalization of automobile interiors are increasing. As an important part of the car, automobile interiors not only affect the comfort experience of drivers and passengers, but also the overall quality and market competitiveness of the car. In the field of automobile interior manufacturing, injection molding technology has become one of the mainstream manufacturing methods due to its advantages such as high efficiency, precision and mass production.

[0003] Traditional demoulding methods mostly use ejector pins, which have obvious disadvantages. On the one hand, the ejection marks are obvious. The ejector pins are in rigid contact with the product surface, which can easily leave ejection marks on the product surface. For products such as automotive interiors that have extremely high requirements for appearance, even tiny marks will have a serious impact on the overall aesthetics. In addition, ejection marks will cause the product surface to be uneven. In subsequent surface treatment processes, such as painting and electroplating, the uneven surface is prone to defects. For example, the plastic decorative parts on the car door panels have an uneven surface due to ejection marks. After painting, problems such as uneven paint thickness and inconsistent gloss may occur. This not only increases the scrap rate and production costs, but may also cause the product to fail to meet the quality standards of the automobile manufacturer, causing economic losses to the company. Summary of the Invention

[0004] The purpose of the present invention is to provide a multifunctional and convenient mold-removing automobile interior precision injection molding integrated molding device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration, comprising:

[0006] A base, a workbench is provided on the upper surface of the base, a support frame is provided on the upper surface of the workbench, a slidable sliding door is provided on the surface of the support frame, a demoulding mechanism is provided at the center of the support frame, the demoulding mechanism includes a vibration assembly and a mold assembly, the mold assembly includes: a fixed forming block, positioning blocks are provided on the upper and lower surfaces of the fixed forming block, a fixed mold is also provided on one side surface of the fixed forming block, a feeding cylinder connected to the fixed mold is provided inside the support frame, a hydraulic cylinder is also provided on the inner side surface of the support frame, and a storage box is provided at the end of the output shaft of the hydraulic cylinder;

[0007] The vibration component includes: a storage box body, a storage inner box is also provided inside the storage box body, two top contact bars are provided on one side surface of the storage inner box, small motors are provided on both side surfaces of the storage inner box, a movable connecting bar is provided at the end of the output shaft of the small motor, a fixing bar is provided on one side surface of the movable connecting bar, and a bottom support wheel is provided on the bottom surface of the movable connecting bar.

[0008] Furthermore, the upper and lower surfaces of the storage box body are provided with positioning piles that cooperate with the positioning block, one side surface of the storage box body is provided with a rotatable flip molding block, one side surface of the flip molding block is provided with a movable mold that cooperates with the fixed mold, and a shaft is provided at the connection between the storage box body and the flip molding block. A drive motor is provided on one side surface of the storage box body, and one end of the shaft is provided on the output end of the drive motor.

[0009] Furthermore, the upper surface of the workbench is provided with a finished product storage groove that cooperates with the flip forming block, a buffer plate is provided inside the finished product storage groove, a rotating shaft is provided at the internal connection between the buffer plate and the finished product storage groove, a flexible pad is provided on the upper surface of the buffer plate, and a plurality of buffer springs are provided on the bottom surface of the buffer plate, and the bottom surface of the buffer spring is connected to the inner bottom surface of the finished product storage groove.

[0010] Furthermore, the vibration assembly further includes a connecting plate, the bottom surface of the connecting plate is connected to the upper surface of the movable mold, and the outer surfaces of the connecting plate and the movable mold are provided with matching limiting side strips.

[0011] Furthermore, a movable plate body is provided on the upper surface of the connecting plate, a connecting spring is provided on the bottom surface of the movable plate body, and the bottom surface of the connecting spring is connected to the inner bottom surface of the flip forming block.

[0012] Furthermore, the upper surface of the movable plate body is provided with two force-bearing grooves that cooperate with the top contact strip block, a fixed engaging disk is provided at the center of the upper surface of the connecting plate, a rotating engaging disk is provided on the upper surface of the fixed engaging disk, and a limiting spring is provided at the center of the rotating engaging disk and the fixed engaging disk.

[0013] Furthermore, a servo motor is provided on the upper surface of the rotating engagement disk, four connecting side plates are provided on the side surface of the servo motor, and a force-bearing plate body is provided on the upper surface of the connecting side plates.

[0014] Furthermore, one side surface of the two connecting side plates on the left and right side surfaces of the servo motor is provided with a connecting block, the bottom surface of the connecting block is provided with a contraction motor, the bottom surface of the contraction motor is provided with a bottom connecting frame, and the two side surfaces of the bottom connecting frame are provided with top touch rods, and the top touch rods are located inside the movable mold.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In this solution, by providing a vibration component, efficient and precise injection molding of automotive interior products is achieved. The hydraulic cylinder pushes the storage box body and the movable mold on it to fit tightly with the fixed mold on the fixed molding block to complete the mold closing, which provides a guarantee for forming a closed and precise injection molding cavity and effectively improves the dimensional accuracy and quality stability of the injection molded product. After the injection is completed, the hydraulic cylinder is used to drive the movable mold to separate from the fixed mold, and then the driving motor drives the flip molding block to rotate, so that the molded part falls under the action of gravity. This demoulding method is simple and direct, reduces manual intervention, and improves production efficiency. At the same time, the buffer plate, flexible pad and buffer spring in the finished product storage slot can play a good buffering role when the product falls, avoiding damage to the product due to direct impact, reducing the defective rate, saving production costs, and overall improving the degree of automation and product quality of automotive interior precision injection molding production.

[0017] 2. In this solution, the mold assembly is provided to significantly improve the demoulding efficiency and product quality. When the demoulding work is not in progress, the vibration assembly is stored in the storage inner box, which does not affect the normal injection molding operation of the mold assembly, thereby ensuring the overall stability and injection molding accuracy of the device. After the product is molded, if the molded part is still attached to the movable mold after the flip molding block is flipped, the vibration assembly can achieve efficient demoulding through a series of precise actions, causing the movable mold to shake up and down under the action of the connecting spring. This vibration method can quickly separate the product from the movable mold, and the setting of the limiting side strips effectively limits the shaking range, ensuring the safety and stability of the demoulding process. Finally, the retraction motor drives the touch rod to extend from the inside of the movable mold, slightly touching the product, further promoting the product to fall off. The vibration assembly can adapt to the demoulding needs of products in different situations, greatly improving the success rate of demoulding and production efficiency, and reducing the risk of product damage and production stagnation caused by demoulding difficulties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 Schematic diagram of the internal structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the storage box of the present invention;

[0021] Figure 4 is a schematic diagram of a vibration assembly of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the rotating meshing disc and the fixed meshing disc of the present invention;

[0023] Figure 6 This is a schematic diagram of the storage inner box structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the buffer plate of the present invention;

[0025] Figure 8 Schematic diagram of the top contact rod structure of the present invention.

[0026] Figure: 1, base; 2, workbench; 3, finished product storage slot; 4, buffer plate; 5, support frame; 6, sliding door; 7, storage box; 8, positioning pile; 9, movable mold; 10, fixed molding block; 11, positioning block; 12, feeding barrel; 13, hydraulic cylinder; 14, flip molding block; 15, fixed mold; 16, storage box; 17, top contact bar; 18, movable plate; 19, load-bearing plate; 20, driving motor; 21, connecting rod Connecting block; 22. Servo motor; 23. Connecting side plate; 24. Force groove; 25. Connecting spring; 26. Limiting side bar; 27. Rotating engagement disk; 28. Limiting spring; 29. ​​Fixed engagement disk; 30. Small motor; 31. Movable connecting bar; 32. Bottom support wheel; 33. Fixing bar block; 34. Buffer spring; 35. Flexible pad; 36. Retraction motor; 37. Bottom connecting frame; 38. Top contact rod; 39. Connecting plate. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figures 1 to 8 , a multifunctional and convenient mold-removing automobile interior precision injection molding integrated molding device, comprising:

[0029] Base 1, a workbench 2 is provided on the upper surface of the base 1, a support frame 5 is provided on the upper surface of the workbench 2, a slidable sliding door 6 is provided on the surface of the support frame 5, a demoulding mechanism is provided at the center of the support frame 5, the demoulding mechanism includes a vibration component and a mold component, the mold component includes: a fixed molding block 10, the upper and lower surfaces of the fixed molding block 10 are provided with positioning blocks 11, one side surface of the fixed molding block 10 is also provided with a fixed mold 15, a feeding barrel 12 connected to the fixed mold 15 is provided inside the support frame 5, a hydraulic cylinder 13 is also provided on the inner side surface of the support frame 5, a storage box body 7 is provided at the end of the output shaft of the hydraulic cylinder 13, and a positioning pile 8 cooperating with the positioning block 11 is provided on the upper and lower surfaces of the storage box body 7. A rotatable flip molding block 14 is provided on one side surface of 7, and a movable mold 9 that cooperates with the fixed mold 15 is provided on one side surface of the flip molding block 14. A shaft is provided at the connection between the storage box body 7 and the flip molding block 14, and a drive motor 20 is provided on one side surface of the storage box body 7. One end of the shaft is provided on the output end of the drive motor 20. A finished product storage groove 3 that cooperates with the flip molding block 14 is opened on the upper surface of the workbench 2, and a buffer plate 4 is provided inside the finished product storage groove 3. A rotating shaft is provided at the internal connection between the buffer plate 4 and the finished product storage groove 3. A flexible pad 35 is provided on the upper surface of the buffer plate 4, and a plurality of buffer springs 34 are provided on the bottom surface of the buffer plate 4. The bottom surface of the buffer spring 34 is connected to the inner bottom surface of the finished product storage groove 3;

[0030] Before the injection molding operation begins, the staff drives the hydraulic cylinder 13 to start, pushing the storage box body 7 and its flip molding block 14 and movable mold 9 and other components to move as a whole, and the movable mold 9 on it gradually approaches the fixed mold 15 on the fixed molding block 10 until the movable mold 9 is tightly fitted with the fixed mold 15, completing the mold closing operation and forming a closed injection molding cavity. Since the positioning piles 8 on the storage box body 7 cooperate with the positioning blocks 11 on the fixed molding block 10, precise positioning is provided for the rotation of the flip molding block 14 to ensure that the position of the mold assembly is stable during the movement. At the same time, the feeding barrel 12 starts to work and injects the molten plastic material into the cavity formed by the fixed mold 15 and the movable mold 9. The molten plastic gradually fills every corner in the cavity and is maintained at a certain pressure and temperature for a period of time to fully cool and solidify to form the preliminary shape of the car interior. After the injection molding is completed, the hydraulic cylinder 13 drives the storage box body 7 and the components thereon to move in the opposite direction, so that the movable mold 9 is gradually separated from the fixed mold 15, and then the driving motor 20 is started by the staff signal control, which drives the flip molding block 14 to rotate, so that the molded parts in the movable mold 9 fall under the action of gravity. If the molded parts are still attached to the movable mold 9 after the flip molding block 14 is flipped, at this time, an external force is applied through a specific demoulding mechanism to make the movable mold 9 vibrate, and the product is separated from the movable mold 9. The separated product falls into the finished product storage groove 3 opened on the upper surface of the workbench 2 due to gravity. The buffer plate 4 in the finished product storage groove 3 is connected to the inside of the storage groove 3 through a rotating shaft, and a flexible pad 35 is provided on the upper surface of the buffer plate 4, and a plurality of buffer springs 34 are provided on the bottom surface. When the product falls in, the buffer plate 4 rotates downward under the action of the gravity and impact force of the product, and the buffer spring 34 is compressed, thereby playing a buffering role to avoid damage to the product due to direct impact. Finally, the product falls smoothly on the buffer plate 4.

[0031] The vibration component includes: a storage box body 7, a storage inner box 16 is further provided inside the storage box body 7, two top contact strips 17 are provided on one side surface of the storage inner box 16, a small motor 30 is provided on both side surfaces of the storage inner box 16, a movable connecting strip 31 is provided at the end of the output shaft of the small motor 30, a fixing strip 33 is provided on one side surface of the movable connecting strip 31, a bottom support wheel 32 is provided on the bottom surface of the movable connecting strip 31, the vibration component also includes a connecting plate 39, the bottom surface of the connecting plate 39 is connected to the upper surface of the movable mold 9, the outer surface of the connecting plate 39 and the movable mold 9 are provided with matching limiting side strips 26, the upper surface of the connecting plate 39 is provided with a movable plate body 18, the bottom surface of the movable plate body 18 is provided with a connecting spring 25, the bottom surface of the connecting spring 25 is connected to the inner bottom surface of the flip molding block 14, the movable plate body 18 The upper surface of the connecting plate 39 is provided with two force-bearing grooves 24 that cooperate with the top contact strip block 17. A fixed engaging disk 29 is provided at the center of the upper surface of the connecting plate 39. A rotating engaging disk 27 is provided on the upper surface of the fixed engaging disk 29. A limiting spring 28 is provided at the center of the rotating engaging disk 27 and the fixed engaging disk 29. A servo motor 22 is provided on the upper surface of the rotating engaging disk 27. Four connecting side plates 23 are provided on the side surface of the servo motor 22. A force-bearing plate body 19 is provided on the upper surface of the connecting side plates 23. A connecting block 21 is provided on one side surface of the two connecting side plates 23 on the left and right side surfaces of the servo motor 22. A contraction motor 36 is provided on the bottom surface of the connecting block 21. A bottom connecting frame 37 is provided on the bottom surface of the contraction motor 36. Top contact rods 38 are provided on both side surfaces of the bottom connecting frame 37. The top contact rods 38 are located inside the movable mold 9.

[0032] When the demolding work is not being carried out, the vibration component inside 14 is stored inside the storage inner box 16, so that the flip molding block 14 is fitted with the side surface of the storage box body 7. At this time, the two top contact strips 17 are fitted with the force grooves 24, so that the movable mold 9 is restricted by the top contact strips 17 in the vertical state and cannot move, so that normal injection molding can be carried out. After the product is formed, the driving motor 20 is started by the staff signal control, and the flip molding block 14 is driven to rotate, so that the molded parts in the movable mold 9 fall under the action of gravity. If the molded parts are still attached to the movable mold 9 after the flip molding block 14 is flipped, at this time, the two small motors 30 are driven to contract by the staff signal, driving the two clamps The fixed bar block 33 slides out from the inside of the top contact bar block 17 and combines with the surface of the force-bearing plate 19. Then, the servo motor 22 is driven to rotate by the signal, driving the rotating meshing disk 27 to rotate. The meshing effect between the rotating meshing disk 27 and the fixed meshing disk 29 will cause the movable mold 9 to swing up and down under the action of the connecting spring 25. During the shaking process, the range of the shaking is limited by the limiting side bar 26, and the product can be quickly separated from the inside of the movable mold 9 through shaking. Then, the staff drives the retraction motor 36 to extend, driving the four top contact rods 38 to extend from the inside of the movable mold 9, performing a slight top-touching effect on the product, so that the product falls off faster.

[0033] The working principle of the present invention is:

[0034] Before the injection molding operation begins, the staff drives the hydraulic cylinder 13 to start, pushing the storage box body 7 and its flip molding block 14 and movable mold 9 and other components to move as a whole, and the movable mold 9 on it gradually approaches the fixed mold 15 on the fixed molding block 10 until the movable mold 9 is tightly fitted with the fixed mold 15, completing the mold closing operation and forming a closed injection molding cavity. Since the positioning piles 8 on the storage box body 7 cooperate with the positioning blocks 11 on the fixed molding block 10, precise positioning is provided for the rotation of the flip molding block 14 to ensure that the position of the mold assembly is stable during the movement. At the same time, the feeding barrel 12 starts to work and injects the molten plastic material into the cavity formed by the fixed mold 15 and the movable mold 9. The molten plastic gradually fills every corner in the cavity and is maintained at a certain pressure and temperature for a period of time to fully cool and solidify to form the preliminary shape of the car interior. After the injection molding is completed, the hydraulic cylinder 13 drives the storage box body 7 and the components thereon to move in the opposite direction, so that the movable mold 9 is gradually separated from the fixed mold 15. Subsequently, the driving motor 20 is started by the staff signal control, driving the flip molding block 14 to rotate, so that the molded parts in the movable mold 9 fall under the action of gravity. If the molded parts are still attached to the movable mold 9 after the flip molding block 14 is flipped, at this time, an external force is applied by a specific demoulding mechanism to make the movable mold 9 vibrate, separating the product from the movable mold 9. The separated products fall into the finished product storage groove 3 opened on the upper surface of the workbench 2 due to gravity. The buffer plate 4 in the finished product storage groove 3 is connected to the inside of the storage groove 3 through a rotating shaft, and a flexible pad 35 is provided on the upper surface of the buffer plate 4, and a plurality of buffer springs 34 are provided on the bottom surface. When the product falls in, the buffer plate 4 rotates downward under the action of the gravity and impact force of the product, and the buffer spring 34 is compressed, thereby playing a buffering role to prevent the product from being damaged by direct impact. Finally, the product falls smoothly on the buffer plate 4;

[0035] When the demolding work is not being carried out, the vibration component inside 14 is stored inside the storage inner box 16, so that the flip molding block 14 is fitted with the side surface of the storage box body 7. At this time, the two top contact strips 17 are fitted with the force grooves 24, so that the movable mold 9 is restricted by the top contact strips 17 in the vertical state and cannot move, so that normal injection molding can be carried out. After the product is formed, the driving motor 20 is started by the staff signal control, and the flip molding block 14 is driven to rotate, so that the molded parts in the movable mold 9 fall under the action of gravity. If the molded parts are still attached to the movable mold 9 after the flip molding block 14 is flipped, at this time, the two small motors 30 are driven to contract by the staff signal, driving the two clamps The fixed bar block 33 slides out from the inside of the top contact bar block 17 and combines with the surface of the force-bearing plate 19. Then, the servo motor 22 is driven to rotate by the signal, driving the rotating meshing disk 27 to rotate. The meshing effect between the rotating meshing disk 27 and the fixed meshing disk 29 will cause the movable mold 9 to swing up and down under the action of the connecting spring 25. During the shaking process, the range of the shaking is limited by the limiting side bar 26, and the product can be quickly separated from the inside of the movable mold 9 through shaking. Then, the staff drives the retraction motor 36 to extend, driving the four top contact rods 38 to extend from the inside of the movable mold 9, performing a slight top-touching effect on the product, so that the product falls off faster.

[0036] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multifunctional and convenient mold-removing automobile interior precision injection molding integrated molding device, comprising: A base, a workbench is provided on the upper surface of the base, a support frame is provided on the upper surface of the workbench, a slidable sliding door is provided on the surface of the support frame, a demoulding mechanism is provided at the center of the support frame, the demoulding mechanism includes a vibration assembly and a mold assembly, the mold assembly includes: a fixed forming block, positioning blocks are provided on the upper and lower surfaces of the fixed forming block, a fixed mold is also provided on one side surface of the fixed forming block, a feeding cylinder connected to the fixed mold is provided inside the support frame, a hydraulic cylinder is also provided on the inner side surface of the support frame, and a storage box is provided at the end of the output shaft of the hydraulic cylinder; The vibration component includes: a storage box body, a storage inner box is also provided inside the storage box body, two top contact bars are provided on one side surface of the storage inner box, small motors are provided on both side surfaces of the storage inner box, a movable connecting bar is provided at the end of the output shaft of the small motor, a fixing bar is provided on one side surface of the movable connecting bar, and a bottom support wheel is provided on the bottom surface of the movable connecting bar.

2. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration according to claim 1 is characterized in that: The upper and lower surfaces of the storage box body are provided with positioning piles that cooperate with the positioning block, one side surface of the storage box body is provided with a rotatable flip molding block, one side surface of the flip molding block is provided with a movable mold that cooperates with the fixed mold, a shaft is provided at the connection between the storage box body and the flip molding block, one side surface of the storage box body is provided with a driving motor, and one end of the shaft is provided on the output end of the driving motor.

3. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration according to claim 1 is characterized in that: The upper surface of the workbench is provided with a finished product storage groove that cooperates with the flip forming block. A buffer plate is provided inside the finished product storage groove. A rotating shaft is provided at the internal connection between the buffer plate and the finished product storage groove. A flexible pad is provided on the upper surface of the buffer plate. A plurality of buffer springs are provided on the bottom surface of the buffer plate. The bottom surface of the buffer spring is connected to the inner bottom surface of the finished product storage groove.

4. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration according to claim 1 is characterized in that: The vibration assembly further comprises a connecting plate, the bottom surface of which is connected to the upper surface of the movable mold, and the outer surfaces of the connecting plate and the movable mold are provided with matching limiting side strips.

5. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration according to claim 4 is characterized in that: A movable plate body is provided on the upper surface of the connecting plate, a connecting spring is provided on the bottom surface of the movable plate body, and the bottom surface of the connecting spring is connected to the inner bottom surface of the flip forming block.

6. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration according to claim 5, characterized in that: The upper surface of the movable plate body is provided with two force-bearing grooves that cooperate with the top contact strip block. A fixed engaging disk is provided at the center of the upper surface of the connecting plate. A rotating engaging disk is provided on the upper surface of the fixed engaging disk. A limiting spring is provided at the center of the rotating engaging disk and the fixed engaging disk.

7. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior according to claim 6, characterized in that: A servo motor is provided on the upper surface of the rotating engagement disk, four connecting side plates are provided on the side surface of the servo motor, and a force-bearing plate body is provided on the upper surface of the connecting side plates.

8. The multifunctional and convenient mold-removing integrated precision injection molding device for automobile interior decoration according to claim 7, characterized in that: A connecting block is provided on one side surface of the two connecting side plates on the left and right side surfaces of the servo motor, a contraction motor is provided on the bottom surface of the connecting block, a bottom connecting frame is provided on the bottom surface of the contraction motor, and top touch rods are provided on both side surfaces of the bottom connecting frame, and the top touch rods are located inside the movable mold.

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