Rotational molding production equipment with inner and outer mold synchronous forming structure

Abstract

The invention relates to the technical field of plastic product processing, in particular to rotational molding production equipment with an inner and outer mold synchronous forming structure, which comprises a track extending into a heating and cooling system, and further comprises a horizontal rotating mechanism, a vertical rotating mechanism and a forming mold group, the horizontal rotating mechanism is arranged on the track and is in sliding connection with the track, the vertical rotating mechanism is connected with the horizontal rotating mechanism and is located above the horizontal rotating mechanism, and a forming die set which has a temperature compensation function and can change the external structure in a targeted mode according to product requirements is arranged in the vertical rotating mechanism; the vertical rotating mechanism and the horizontal rotating mechanism are matched to achieve horizontal and vertical multi-axis steering movement of the forming die set. The invention has the following effects: synchronous temperature compensation of the inner mold and the outer mold improves the molding quality, effectively eliminates the temperature difference between the inner mold and the outer mold, ensures synchronous melting and curing of materials, and reduces product defects; the modular mold design is suitable for products of multiple specifications, and one mold has multiple purposes.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic product processing, and particularly relates to a rotational molding production device with an internal and external mold synchronous molding structure. Background Art

[0002] A rotational molding production device is a device used to manufacture hollow plastic products, mainly for the rotational molding process. In this process, by heating and rotating the mold, plastic powder is evenly distributed on the inner wall of the mold, and the required product is formed after cooling. Traditional rotational molding equipment mostly adopts a single-mold structure, and it is difficult to synchronously control the temperature inside and outside the mold, resulting in uneven melting of materials and a long molding cycle. In addition, the existing mold structure is fixed and cannot quickly adjust the cavity size or shape according to product requirements. Replacing the mold is time-consuming and laborious, restricting production flexibility. Therefore, there is an urgent need for a rotational molding production device that can achieve synchronous molding of the internal and external molds, precise temperature control, and has a modular rapid adjustment function to solve the above technical bottlenecks. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a rotational molding production device with an internal and external mold synchronous molding structure, including tracks. There are two tracks, both of which are fixed on the ground and extend into the heating and cooling systems; It also includes a horizontal rotation mechanism, a vertical rotation mechanism, and a molding mold group; The horizontal rotation mechanism is placed on the track and is slidably connected thereto. The vertical rotation mechanism is connected to the horizontal rotation mechanism and is located above it. The molding mold group with temperature compensation function and capable of specifically changing the external structure according to product requirements is provided inside the vertical rotation mechanism. The vertical rotation mechanism and the horizontal rotation mechanism cooperate to realize the multi-axis steering movement of the molding mold group in the horizontal and vertical directions.

[0004] Preferably: The horizontal rotation mechanism includes a base. Multiple sliding seats are provided on the lower side of the base corresponding to the two tracks. The sliding seats are stuck on the tracks and can slide thereon. A horizontal rotation motor is installed at the center of the upper end of the base. The horizontal rotation motor drives the vertical rotation mechanism to rotate horizontally. An annular groove is provided at the edge of the upper surface of the base, and the bottom of the vertical rotation mechanism is located in the annular groove, and the two are slidably connected.

[0005] Preferably: The vertical rotation mechanism includes a turntable. The lower end of the turntable is connected to the output shaft of the horizontal rotation motor. Multiple sliding rods with their bottoms located in the annular groove are provided at the lower end of the turntable. Ball bearings are provided at the bottoms of the sliding rods, and the ball bearings are in contact with the bottom side wall of the annular groove. The lower half of the sliding rods is in the annular groove.

[0006] Preferably: on the upper end of the turntable, side plates are symmetrically arranged on the left and right. At the upper part of each side plate, a rotating shaft is provided. The rotating shaft is placed inside the side plate, and both ends thereof extend out of the side plate. A molding die set is fixedly installed between the two rotating shafts. At one end of one of the rotating shafts away from the molding die set, a vertical rotating motor is provided. The output shaft of the vertical rotating motor is connected to the rotating shaft, and the vertical rotating motor is fixed on the outer side wall of the side plate through a motor bracket.

[0007] Preferably: the molding die set includes a housing and a cover plate. The left and right sides of the housing are fixed to the two rotating shafts. A cover plate is provided at the top of the housing. An outer mold is arranged on the inner wall of the housing. An inner mold is installed at the center of the outer mold. The inner mold and the outer mold are detachably installed. At the center of the bottom of the outer mold, a screw hole penetrating the housing is provided. A screw is threadedly connected in the screw hole, and the screw is connected to the inner mold.

[0008] Preferably: the inner mold includes a mold body. An installation hole is provided at the bottom of the mold body, and it has a threaded structure inside. The mold body is fixed to the screw through the installation hole. A plurality of equally spaced side grooves are formed on the side wall of the mold body, and detachable filling strips are arranged in the side grooves.

[0009] Preferably: a plug rod is provided at the bottom of the side groove. A jack is provided at the bottom of the filling strip. An arc-shaped groove is also provided at the top of the filling strip. The filling strip is inserted and matched with the plug rod through the jack at the bottom.

[0010] Preferably: an inner cavity is provided inside the mold body, and a fixing component is installed in the inner cavity. The fixing component includes a fixing disk. The fixing disk is threadedly connected to the top of the inner cavity. An outer ring with an external thread structure is provided at the bottom of the fixing disk. A heating rod is arranged at the center of the lower end of the fixing disk.

[0011] Preferably: a plurality of inner holes are circumferentially distributed on the lower surface of the fixing disk outside the heating rod. The positions and quantities of the inner holes correspond to the filling strips. A pressing column is arranged inside the inner hole. The bottom of the pressing column is semi-circular, which corresponds to the groove. An elastic member is provided inside the upper end thereof, and the elastic member is connected to the top of the inner hole. The pressing column is slidably connected to the inner wall of the inner hole.

[0012] Preferably: the rotational molding production equipment further includes an auxiliary mechanism for supporting the molding die set. The auxiliary mechanism is installed on the vertical rotation mechanism; The auxiliary mechanism includes a lead screw and a lifting plate. A bearing is sleeved at the bottom of the lead screw and embedded in the turntable. The top of the lead screw is connected to the output shaft of a moving motor. The moving motor is installed on the side plate through a motor plate. One end of the lifting plate is sleeved on the lead screw, and the other end is placed between the two side plates and below the housing. Two support bars are distributed front and back above the lifting plate. The support bars are made of anti-slip material. The height of the front support bar is less than that of the rear support bar.

[0013] The technical effects and advantages of the present invention: 1. Synchronous temperature compensation for the inner and outer molds to improve the molding quality: The inner mold is equipped with heating rods, and the heat is evenly transferred to the surface of the mold body through the fixing components. Working in coordination with the external heating system of the outer mold, it effectively eliminates the temperature difference between the inner and outer molds, ensures the synchronous melting and solidification of the material, and reduces product defects.

[0014] 2. Modular mold design to adapt to multiple specifications of products: The filling strips in the side grooves of the inner mold are detachable and replaceable. Combined with the quick locking structure of the insertion rod and the abutting column, users can flexibly adjust the external contour of the mold according to needs, achieving "one mold for multiple uses" and significantly reducing the mold transformation cost.

[0015] 3. Multi-axis coordinated rotation to optimize the material distribution: The horizontal rotation mechanism and the vertical rotation mechanism are linked to drive the mold group to achieve multi-degree-of-freedom movement in the horizontal and vertical directions, enabling the molten material to evenly adhere to the surface of the mold under the action of centrifugal force and improving the wall thickness consistency of the product.

[0016] 4. Auxiliary support mechanism to enhance the demolding stability: The lifting plate and the support strip dynamically lift the outer shell during demolding. Combined with the inclined design with the front lower and the rear higher, it ensures the balanced force of the mold, avoids product deformation due to gravity, and reduces the difficulty of manual operation at the same time. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 2 is a front view of a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 3 is a schematic structural diagram of an auxiliary mechanism in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 4 is a partial exploded view of a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 5 is a schematic internal structure diagram of the outer shell in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 6 is in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application Figure 5 partial decomposition diagram; Figure 7 is a schematic structural diagram of the inner mold in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 8 is in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application Figure 7 schematic structural diagram at position A; Figure 9 It is a partial structural schematic diagram of the inner mold in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application; Figure 10 It is a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application Figure 9 and is a structural schematic diagram at position B therein; Figure 11 It is a structural schematic diagram of the separation state between the pressing column and the fixed disk in a rotational molding production device with an inner and outer mold synchronous molding structure provided by an embodiment of the present application.

[0018] In the figure: 1, horizontal rotation mechanism; 2, track; 3, vertical rotation mechanism; 4, molding die set; 5, auxiliary mechanism; 11, base; 12, sliding seat; 13, horizontal rotation motor; 14, annular groove; 31, turntable; 32, sliding rod; 33, side plate; 34, rotating shaft; 35, vertical rotation motor; 41, housing; 42, outer mold; 43, inner mold; 44, cover plate; 45, screw hole; 46, screw; 431, mold body; 432, side groove; 433, filling strip; 434, insertion rod; 435, insertion hole; 436, groove; 437, inner cavity; 438, fixing component; 4381, fixed disk; 4382, heating rod; 4383, pressing column; 4384, elastic member; 51, lead screw; 52, moving motor; 53, lifting plate; 54, support bar. Specific embodiments

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes. Embodiment

[0020] Please refer to Figures 1 to 11 , in this embodiment, a rotational molding production device with an inner and outer mold synchronous molding structure is provided, including two tracks 2, both of which are fixed on the ground. As Figure 1 shown, the two tracks 2 are only schematic diagrams and not their actual lengths, and they can extend into the heating and cooling systems. Move the device on the tracks 2. During molding, push it into the heating system, and after heating and molding, send it to the cooling system for cooling and temperature reduction. Finally, move the cooling system to demold it; It also includes a horizontal rotation mechanism 1 and a vertical rotation mechanism 3. The horizontal rotation mechanism 1 is installed on the track 2 and can slide on the track 2. The vertical rotation mechanism 3 is connected to the horizontal rotation mechanism 1 and is located above it. A forming die set 4 is provided inside the vertical rotation mechanism 3. The vertical rotation mechanism 3 is used to realize the vertical rotation of the forming die set 4, while the horizontal rotation mechanism 1 realizes its horizontal rotation. The two act on each other, enabling the forming die set 4 to have the effect of multi-axis turning, so that the materials inside it are more evenly coated during coating, and the quality of the processed and formed materials is better; As Figure 2 and Figure 3 shown, further, on the vertical rotation mechanism 3, there is also an auxiliary mechanism 5. The auxiliary mechanism 5 can play a supporting role when the forming die set 4 is demolded, maintaining the stability of the forming die set 4; Specifically, in the horizontal rotation mechanism 1, it includes a base 11. Multiple sliding seats 12 are provided on the lower side of the base 11 corresponding to the two tracks 2. The sliding seats 12 are stuck on the track 2 and can slide on it. The sliding seats 12 play the roles of sliding and limiting. A horizontal rotation motor 13 is installed at the center of the upper end of the base 11. The horizontal rotation motor 13 drives the vertical rotation mechanism 3 to rotate horizontally. At the same time, an annular groove 14 is provided at the edge of the upper surface of the base 11. The bottom of the vertical rotation mechanism 3 is located in the annular groove 14, and the two are slidably connected, enabling the vertical rotation mechanism 3 to maintain stability during horizontal rotation; The vertical rotation mechanism 3 includes a turntable 31. The lower end of the turntable 31 is connected to the output shaft of the horizontal rotation motor 13. After the horizontal rotation motor 13 is started, it can drive the turntable 31 to realize horizontal rotation. Multiple slide bars 32 with their bottoms located in the annular groove 14 are provided at the lower end of the turntable 31. Ball bearings are provided at the bottoms of the slide bars 32. The ball bearings are in contact with the bottom side wall of the annular groove 14, which can significantly reduce the friction force. The lower half of the slide bars 32 is in the annular groove 14, preventing their displacement in the horizontal direction; On the upper end of the turntable 31, side plates 33 are symmetrically arranged on the left and right. At the upper part of each side plate 33, a rotating shaft 34 is provided. The rotating shaft 34 is placed inside the side plate 33 and its two ends extend out of the side plate 33. The forming die set 4 is fixedly installed between the two rotating shafts 34. And, at one end of one of the rotating shafts 34 away from the forming die set 4, a vertical rotation motor 35 is provided. The output shaft of the vertical rotation motor 35 is connected to the rotating shaft 34 to realize the output of power. The vertical rotation motor 35 is fixed on the outer side wall of the side plate 33 through a motor bracket; During operation, the horizontal rotation motor 13 drives the entire vertical rotation mechanism 3 to rotate horizontally, while the vertical rotation motor 35 drives the forming die set 4 to rotate vertically between the two side plates 33 through the rotating shaft 34, realizing the multi-axis rotation effect and increasing the uniformity of the melted material coating; The interior of the forming die set 4 is filled with materials and used as a mold to make the materials into the required styles. It includes a housing 41 and a cover plate 44. The left and right sides of the housing 41 are fixed to two rotating shafts 34. A cover plate 44 is provided at the top of the housing 41. The cover plate 44 and the housing 41 are connected in a convenient detachable manner. For example, they are connected by threads, or they can also be connected by snap connections, etc. As Figure 4 shown, it is a threaded connection method. Opening the cover plate 44 allows materials to be loaded or the processed and formed products to be demolded and taken out. During processing, the cover plate 44 is closed and installed. The handle on the cover plate 44 helps with the disassembly and assembly of the cover plate 44; During demolding, the vertical rotation motor 35 is started to rotate the housing 41 forward of the equipment, making the opening of the housing 41 slope downward obliquely, facilitating the pulling out of the product. During this process, the support part in the auxiliary mechanism 5 moves upward to support the housing 41 and maintain the stability of the housing 41 during demolding; The auxiliary mechanism 5 includes a lead screw 51 and a lifting plate 53. The bottom of the lead screw 51 is sleeved with a bearing and embedded in the turntable 31, enabling the lead screw 51 to rotate. The top of the lead screw 51 is connected to the output shaft of the moving motor 52. The moving motor 52 is installed on the side plate 33 through a motor plate. One end of the lifting plate 53 is sleeved on the lead screw 51, and the other end is placed between the two side plates 33 and below the housing 41. Initially, even when not in use, as Figure 2 and Figure 3 shown, the lifting plate 53 is located on the upper surface of the turntable 31. Two support bars 54 are distributed front and back above the lifting plate 53. The support bars 54 are made of anti-slip material to increase stability when contacting the housing 41. There is no interference between the bottom of the housing 41 and the lifting plate 53 and the support bars 54. During use, the lead screw 51 is driven by the moving motor 52 to rotate, and then the lifting plate 53 moves upward in the vertical groove on the side wall of the side plate 33 until the support bars 54 contact the housing 41 and stop, serving as a support. The height of the front support bar 54 is less than that of the rear support bar 54, so that the housing 41 will have a downward inclination angle, which is conducive to the demolding operation; An outer mold 42 is provided on the inner wall of the housing 41. An inner mold 43 is installed at the center of the outer mold 42. The inner mold 43 and the outer mold 42 are detachably installed. A threaded hole 45 penetrating the housing 41 is provided at the center of the bottom of the outer mold 42. A screw rod 46 is threadedly connected in the threaded hole 45. The bottom of the screw rod 46 is an inner hexagonal structure. Thus, a screwdriver can be inserted through the bottom of the housing 41 to adjust the position of the screw rod 46. The screw rod 46 is connected to the inner mold 43, which has the effect of installing and fixing the inner mold 43. If the inner mold 43 is removed, the protruding part of the screw rod 46 is screwed back into the threaded hole 45 so that its upper surface is flush with the bottom of the outer mold 42, then the single-mold structure of the outer mold 42 can be achieved and products can also be made. On the contrary, after installing the inner mold 43, multi-cavity products can be made, with a wide range of applications and convenient adjustment; The inner mold 43 includes a mold body 431. Mounting holes are provided at the bottom of the mold body 431. As Figure 5 , Figure 6 shown, there is a threaded structure inside. The mold body 431 is fixed to the screw rod 46 through the mounting holes to complete the installation. Conversely, it is detachable; As Figure 7 shown, a plurality of equally spaced side grooves 432 are provided on the side wall of the mold body 431. Removable filling strips 433 are provided in the side grooves 432. Reinforcing ribs are provided on the outer side wall of the filling strips 433. The filling strips 433 are detachable, so that the filling strips 433 with different external structures can be replaced according to the requirements of different products, achieving multiple uses of one mold; Insertion rods 434 are provided at the bottom of the side grooves 432, and insertion holes 435 are provided at the bottom of the filling strips 433. The two are adapted. In addition, an arc-shaped groove 436 is provided at the top of the filling strip 433. The filling strip 433 is inserted and matched with the insertion rod 434 through the insertion hole 435 at the bottom. At the same time, the fixing component 438 at the top of the mold body 431 acts on the groove 436 to realize further limit fixation; A fixing component 438 is provided at the top of the mold body 431. The fixing component 438 plays a role in fixing the filling strip 433 and solving the problem that there will be a temperature difference between the inner mold 43 and the outer mold 42, and can realize temperature compensation; An inner cavity 437 is provided inside the mold body 431. The fixing component 438 is installed in the inner cavity 437. The fixing component 438 includes a fixing disk 4381. The fixing disk 4381 is threadedly connected to the top of the inner cavity 437. As Figure 9 shown, an outer ring with an external thread structure is provided at the bottom of the fixing disk 4381. A heating rod 4382 is provided at the center of the lower end of the fixing disk 4381. The heating rod 4382 can heat the inner cavity 437, and the heat will be transferred to the outside of the inner mold 43, solving the problem that the surface temperatures of the inner mold 43 and the outer mold 42 are inconsistent due to the fact that the inner mold 43 is at the center of the outer shell 41 and the heating system heats from the outside, and then realizing the synchronous molding of the inner mold 43 and the outer mold 42; A plurality of inner holes are circumferentially distributed on the lower surface of the fixing disk 4381 on the outer side of the heating rod 4382. The positions and numbers of the inner holes correspond to the filling strips 433. Tightening columns 4383 are provided inside the inner holes. The bottom of the tightening column 4383 is semi-circular, which corresponds to the groove 436. An elastic member 4384 is provided on the inner side of the upper end thereof. The elastic member 4384 is connected to the top of the inner hole. As Figure 11 shown, the elastic member 4384 in this article is a spring, and it can also use steel sheets with good elasticity, etc. The tightening column 4383 is slidably connected to the inner wall of the inner hole; During installation, rotate the fixed disk 4381. Its outer ring engages with the inner wall of the inner cavity 437 through threading, and the fixed disk 4381 gradually moves downward. At this time, the abutting column 4383 rotates and moves along with the fixed disk 4381. Meanwhile, during the downward movement of the fixed disk 4381, the abutting column 4383 will gradually be squeezed and contracted into the inner hole. At the same time, due to the large contraction distance of the abutting column 4383, when it passes through the groove 436, it can be contracted after being squeezed. However, when the distance between the fixed disk 4381 and the mold body 431 becomes smaller and smaller, the contraction distance of the abutting column 4383 becomes smaller and smaller, and the resilience of its elastic member 4384 becomes larger and larger. Until the fixed disk 4381 is installed, the abutting column 4383 just snaps into the groove 436. Under the action of the elastic member 4384, the top of the filling strip 433 is fixed and limited, and it cooperates with the insertion rod 434 at the bottom to achieve the stable installation of the filling strip 433. During disassembly and replacement, reverse-rotate and loosen the fixed disk 4381 to separate it from the filling strip 433, and then lift the filling strip 433 upward to separate it from the insertion rod 434.

[0021] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. A rotational molding production device with an inner and outer mold synchronous molding structure, comprising a track (2), wherein the track (2) is provided with two tracks, both of which are fixed on the ground, and the track (2) extends into a heating and cooling system, characterized in that: It also includes a horizontal rotating mechanism (1), a vertical rotating mechanism (3) and a forming die set (4); The horizontal rotating mechanism (1) is placed on the track (2) and is slidably connected thereto; the vertical rotating mechanism (3) is connected to the horizontal rotating mechanism (1) and is located above the horizontal rotating mechanism; a molding die group (4) having a temperature compensation function and capable of changing the external structure in accordance with product requirements is arranged in the vertical rotating mechanism (3); the vertical rotating mechanism (3) cooperates with the horizontal rotating mechanism (1) to realize horizontal and vertical multi-axis steering movement of the molding die group (4); The molding die set (4) comprises a shell (41), an outer die (42) is arranged on the inner wall of the shell (41), an inner die (43) is installed at the center of the outer die (42), the inner die (43) and the outer die (42) are detachably installed, a screw hole (45) penetrating the shell (41) is arranged at the bottom center of the outer die (42), a screw rod (46) is connected to the inner thread of the screw hole (45), and the screw rod (46) is connected to the inner die (43); The inner mold (43) comprises a mold body (431). A mounting hole is provided at the bottom of the mold body (431), wherein a threaded structure is provided inside the mold body (431). The mold body (431) is fixed to a screw rod (46) via the mounting hole. A plurality of side grooves (432) distributed at equal intervals are provided on the side wall of the mold body (431). Separable and detachable filling strips (433) are provided inside the side grooves (432).

2. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 1 is characterized in that: The horizontal rotation mechanism (1) comprises a base (11). A plurality of slides (12) are provided on the lower side of the base (11) corresponding to the two tracks (2). The slides (12) are clamped on the tracks (2) and can slide thereon. A horizontal rotation motor (13) is installed at the center of the upper end of the base (11). The horizontal rotation motor (13) drives the vertical rotation mechanism (3) to rotate horizontally. An annular groove (14) is provided at the edge of the upper surface of the base (11). The bottom of the vertical rotation mechanism (3) is located in the annular groove (14). The two are slidably connected.

3. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 2 is characterized in that: The vertical rotation mechanism (3) comprises a turntable (31), the lower end of which is connected to the output shaft of the horizontal rotation motor (13), and a plurality of slide bars (32) with their bottoms located in the annular groove (14) are arranged at the lower end of the turntable (31), and balls are arranged at the bottom of the slide bars (32), the balls are in contact with the bottom side wall of the annular groove (14), and the lower half of the slide bars (32) is in the annular groove (14).

4. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 3 is characterized in that: The upper end of the turntable (31) is symmetrically provided with side plates (33), and a rotating shaft (34) is provided at the upper position of each side plate (33). The rotating shaft (34) is placed inside the side plate (33) and its two ends extend out of the side plate (33). A forming mold group (4) is fixedly installed between the two rotating shafts (34). A vertical rotating motor (35) is provided at one end of one of the rotating shafts (34) away from the forming mold group (4). The output shaft of the vertical rotating motor (35) is connected to the rotating shaft (34), and the vertical rotating motor (35) is fixed to the outer wall of the side plate (33) through a motor frame.

5. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 1 is characterized in that: The left and right sides of the shell (41) are fixed to the two rotating shafts (34), and a cover plate (44) is provided on the top of the shell (41).

6. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 1 is characterized in that: The bottom of the side groove (432) is provided with an insertion rod (434), the bottom of the filling strip (433) is provided with an insertion hole (435), and the top of the filling strip (433) is also provided with a groove (436) with an arc-shaped cross section, and the filling strip (433) is plugged into and matched with the insertion rod (434) through the insertion hole (435) at the bottom.

7. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 1 is characterized in that: The mold body (431) is provided with an inner cavity (437), and a fixing assembly (438) is installed in the inner cavity (437). The fixing assembly (438) includes a fixing plate (4381), and the fixing plate (4381) is threadedly connected to the top of the inner cavity (437). The bottom of the fixing plate (4381) is provided with an outer ring with an external thread structure, and a heating rod (4382) is arranged at the center of the lower end of the fixing plate (4381).

8. The rotational molding production equipment with inner and outer mold synchronous molding structure according to claim 7 is characterized in that: The lower surface of the fixed plate (4381) is located on the outer side of the heating rod (4382) and has a plurality of inner holes distributed in a circular pattern. The positions and number of the inner holes correspond to the filling strip (433). A tightening column (4383) is provided inside the inner hole. The bottom of the tightening column (4383) is semicircular and corresponds to the groove (436). An elastic member (4384) is provided on the inner side of the upper end thereof. The elastic member (4384) is connected to the top of the inner hole. The tightening column (4383) is slidably connected to the inner wall of the inner hole.

9. The rotational molding production equipment with an inner and outer mold synchronous molding structure according to claim 1, characterized in that: The rotational molding production equipment further comprises an auxiliary mechanism (5) having a supporting function for the molding die set (4), the auxiliary mechanism (5) being mounted on the vertical rotating mechanism (3); the auxiliary mechanism (5) comprising a screw rod (51) and a lifting plate (53), the bottom of the screw rod (51) being sleeved with a bearing and embedded in the turntable (31), the top of the screw rod (51) being connected to the output shaft of a moving motor (52), the moving motor (52) being mounted on the side plate (33) via a motor plate, one end of the lifting plate (53) being sleeved on the screw rod (51), the other end being placed between the two side plates (33) and located below the housing (41), two support bars (54) being distributed front and rear above the lifting plate (53), the support bars (54) being made of anti-slip material, the height of the front support bar (54) being smaller than the rear support bar (54).

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