Plastic product processing compression molding device

Abstract

The invention relates to the technical field of compression molding equipment, and discloses a plastic product processing compression molding device which comprises a main body, and a lower mold is in bolted connection with the inner wall of the bottom of the main body. When the rotating ring moves downwards and rotates, the plastic product can be driven to rotate in the mold cavity while the skirt edge of the plastic product is pushed to move downwards, so that adhesion between the plastic product and the wall of the mold cavity can be destroyed, and the demolding resistance during demolding can be further reduced in combination with rotation of the plastic product when the plastic product slides downwards to be demolded; the situation that demolding is difficult due to adhesion between the product and the upper mold cavity is reduced, time is saved, and meanwhile the time and efficiency of follow-up product collection and follow-up raw material compression molding are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compression molding equipment, and specifically relates to a compression molding device for plastic product processing. Background Technique

[0002] Compression molding is a processing method in plastic recycling. The plastic raw material is first heated to soften the plastic, and then a mold is used for compression molding after softening to obtain the required shape, which has the advantages of high processing efficiency, fast molding efficiency, and fast cooling speed.

[0003] After compression molding of products with a relatively high depth and having concave stripes on the surface, it is generally manually demolded by workers. Due to the relatively deep space depth in the mold cavity and the large pressure during compression molding, it is easy to make the fitting area between the plastic and the inside of the mold relatively tight during compression molding. When the upper mold and the lower mold are separated after compression molding, it is easy to cause difficulties in demolding due to the plastic product adhering to the inner cavity of the upper mold, which is time-consuming and laborious, and will also affect the subsequent collection of products and the compression molding efficiency of plastics. Summary of the Invention

[0004] The purpose of the present invention is to provide a compression molding device for plastic product processing to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention is a compression molding device for plastic product processing, including a main body. The bottom inner wall of the main body is bolted with a lower mold, and further includes;

[0007] A demolding mechanism, which is installed on the top of the main body and is used to close with the lower mold;

[0008] An auxiliary mechanism, which is installed inside the demolding mechanism and is used to control the demolding speed when demolding the compression molded product;

[0009] When the demolding mechanism demolds the compression molded plastic product, the demolding speed of the product can be controlled through the movement of the auxiliary mechanism.

[0010] Further, the main body includes:

[0011] A compression molding component, which is installed on the top of the main body;

[0012] A sliding component, which is slidably arranged outside the compression molding component.

[0013] Further, the demolding mechanism includes:

[0014] The shroud assembly is installed at the bottom of the sliding assembly through a limiting member;

[0015] The downward moving assembly is installed at the bottom of the shroud assembly through a fixing member;

[0016] The moving assembly is installed inside the shroud assembly.

[0017] Furthermore, the auxiliary mechanism includes a plurality of elastic plates installed inside the shroud assembly. The auxiliary mechanism includes:

[0018] The elastic component is installed outside the elastic plate;

[0019] The friction component is installed outside the elastic component.

[0020] Furthermore, the compression molding component includes four positioning shafts fixedly connected to the top of the main body. A square block is fixedly connected to the top of the four positioning shafts, and a hydraulic rod is fixedly connected to the bottom of the square block;

[0021] Among them, a limiting frame is fixedly connected between two positioning shafts, and the bottom of the limiting frame is arc-shaped.

[0022] Furthermore, the sliding assembly includes a sliding plate slidably connected to the outer surfaces of the four positioning shafts. An assistance cavity is opened inside the sliding plate;

[0023] Two sliding rods are slidably connected inside the sliding plate. The two sliding rods are symmetrically distributed with the assistance cavity as the center. One side of the sliding rod close to the assistance cavity is inclined.

[0024] Furthermore, the limiting member includes an upper mold fixedly connected to the bottom of the sliding plate. Four accommodation grooves are opened on the inner wall of the top of the upper mold, and four rectangular grooves are opened on the inner wall of the upper mold;

[0025] The shroud assembly includes a sliding groove opened on one side of the rectangular groove away from the middle of the upper mold;

[0026] A limiting shaft is fixedly connected inside the rectangular groove.

[0027] Furthermore, the fixing member includes a plurality of spring telescopic rods fixedly connected to the outer wall of the bottom of the upper mold. A fixing ring is fixedly connected to the bottom of the plurality of spring telescopic rods;

[0028] The downward moving assembly includes a rotating ring rotatably connected to the outer surface of the fixing ring. A circular ring groove is opened on the top of the rotating ring, and a plurality of inclined plates are fixedly connected inside the circular ring groove;

[0029] The moving assembly includes a conical shaft arranged inside the upper mold. The top of the conical shaft slidably penetrates into the assistance cavity, and a circular plate is fixedly connected to the bottom of the conical shaft;

[0030] A number of L-shaped plates are fixedly connected to the top of the circular plate, and the outer surface of the conical shaft located inside the assistance cavity is in contact with the inclined surface of the sliding rod.

[0031] Furthermore, the elastic plate is slidably connected to the outer surface of the limiting shaft. The bottom of the elastic plate is inclined, and the bottom of the elastic plate is slidably arranged inside the circular ring groove;

[0032] Three notch grooves are formed in the side wall of the elastic plate;

[0033] The elastic component includes a long rod fixedly connected to the outer wall of the elastic plate close to the sliding groove side. Two return springs are fixedly connected to the outer surface of the long rod.

[0034] Furthermore, three limiting rods are arranged on both the left and right sides of the elastic plate. The limiting rods are rotatably connected to the side wall of the rectangular groove;

[0035] The friction component includes a C-shaped frame fixedly connected between the two limiting rods. A torsion spring is fixedly connected to the side wall of the C-shaped frame located outside the limiting rod. The outer surface of the torsion spring is fixedly connected to the side wall of the rectangular groove;

[0036] Wherein, two connecting rods are rotatably connected between the two C-shaped frames, and the two connecting rods are symmetrically distributed with the C-shaped frame as the center;

[0037] Wherein, one end of the two return springs far away from the long rod is fixedly connected to the side wall of the topmost C-shaped frame.

[0038] The present invention has the following beneficial effects:

[0039] 1. In the present invention, through the compression molding component, the sliding component and the downward movement component, when the circular plate slides downward, it will push the top of the plastic product downward. At the same time, when the circular plate moves downward, it will also generate a downward pressure on the top of the elastic plate through the L-shaped plate at the top. When the elastic plate starts to be pressed downward by the L-shaped plate, the L-shaped plate will slide downward on the surface of the limiting shaft and at the same time push the rotating ring through the inclined surface at the bottom to drive the fixed ring and the spring telescopic rod to slide downward. When the rotating ring moves downward and rotates, it will push the skirt of the plastic product downward and at the same time drive the plastic product to rotate in the mold cavity, so as to be able to break the adhesion between the plastic product and the mold cavity wall. Combining with the rotation of the plastic product during downward sliding and demolding can further reduce the demolding resistance during demolding, reduce the situation of difficult demolding caused by the adhesion between the product and the upper mold cavity, save time and improve the subsequent collection of the product and the compression molding time and efficiency of the subsequent raw materials.

[0040] 2. In the present invention, through the elastic component and the friction component, when the C-shaped frame at the top rotates downward, it will push the other two C-shaped frames to rotate synchronously through the connecting rod. At this time, the multiple C-shaped frames that rotate outward will fit on the surface of the plastic product. When the multiple C-shaped frames come into contact with the product surface, the C-shaped frame can contact the surface of the product under the elastic potential energy of the return spring, enabling multiple C-shaped frames to form a multi-point frictional force on the surface of the product. At this time, when the plastic product slides off the mold, the C-shaped frame can slow down the sliding speed of the plastic product through the frictional force between the multiple C-shaped frames and the product surface. By restricting the sliding speed of the plastic product during demolding with multiple C-shaped frames, it is possible to reduce the damage or deformation caused by the collision between the product and the lower mold or surrounding structures during the free fall process due to the excessive sliding speed during demolding, thereby improving the integrity during product demolding and maintaining the appearance quality of the product after compression molding and demolding.

[0041] 3. In the present invention, through the elastic component and the friction component, when multiple C-shaped frames rotate under the action of the spring potential energy, the front ends of the multiple rotating C-shaped frames can adapt to the curvature of the product surface during the demolding of the plastic product, and thus can further restrict the sliding speed of the product during demolding by adapting to the shape of the product surface. At the same time, after demolding, the C-shaped frame can quickly reset and fit with the notch groove under the elastic potential energy of the torsion spring, thereby reducing the contact between the C-shaped frame and the raw material on the lower mold during the next compression molding, and ensuring the stability during subsequent compression molding.

[0042] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 It is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0046] Figure 3 It is a schematic diagram of the sliding component of the present invention;

[0047] Figure 4 It is a schematic diagram of the shrouding component of the present invention;

[0048] Figure 5Schematic partial sectional view of the covering component of the present invention;

[0049] Figure 6 Schematic view of the moving component of the present invention;

[0050] Figure 7 Schematic view of the downward moving component of the present invention;

[0051] Figure 8 Schematic view of the elastic component of the present invention;

[0052] Figure 9 Schematic view of the elastic plate structure of the present invention;

[0053] Figure 10 Plan view of the structure of the auxiliary mechanism during compression molding of the present invention;

[0054] Figure 11 Plan view of the structure during demolding of the present invention.

[0055] In the drawings, the list of components represented by each reference numeral is as follows:

[0056] In the figure: 1, main body; 101, lower mold; 11, compression molding component; 111, positioning shaft; 112, hydraulic rod; 113, limiting frame; 12, sliding component; 121, sliding plate; 122, sliding rod; 123, assistance cavity; 2, demolding mechanism; 201, limiting shaft; 21, covering component; 211, upper mold; 212, rectangular groove; 213, sliding groove; 214, receiving groove; 22, downward moving component; 221, spring telescopic rod; 222, fixed ring; 223, rotating ring; 23, moving component; 231, conical shaft; 232, circular plate; 233, L-shaped plate; 3, auxiliary mechanism; 301, elastic plate; 302, notch groove; 31, elastic component; 311, long rod; 312, limiting rod; 32, friction component; 321, C-shaped frame; 322, connecting rod. Detailed implementation manners

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0058] Please refer to Figures 1 - 11 As shown, the present invention is a compression molding device for plastic product processing, including a main body 1. The bottom inner wall of the main body 1 is bolted with a lower mold 101, and further includes;

[0059] A demolding mechanism 2, which is installed on the top of the main body 1 and is used to close with the lower mold 101;

[0060] An auxiliary mechanism 3 is installed inside the demolding mechanism 2 and is used to control the demolding speed when demolding the compression molded product.

[0061] When the demolding mechanism 2 demolds the compression molded plastic product, the movement of the auxiliary mechanism 3 can be used to control the demolding speed of the product.

[0062] The main body 1 includes:

[0063] A compression molding component 11 is installed on the top of the main body 1.

[0064] A sliding component 12 is slidably arranged outside the compression molding component 11.

[0065] The demolding mechanism 2 includes:

[0066] A shroud component 21 is installed at the bottom of the sliding component 12 through a limiting member.

[0067] A downward moving component 22 is installed at the bottom of the shroud component 21 through a fixing member.

[0068] A moving component 23 is installed inside the shroud component 21.

[0069] The auxiliary mechanism 3 includes a plurality of elastic plates 301 installed inside the shroud component 21. The auxiliary mechanism 3 includes:

[0070] An elastic component 31 is installed outside the elastic plate 301.

[0071] A friction component 32 is installed outside the elastic component 31.

[0072] The compression molding component 11 includes four positioning shafts 111 fixedly connected to the top of the main body 1. A square block is fixedly connected to the top of the four positioning shafts 111, and a hydraulic rod 112 is fixedly connected to the bottom of the square block.

[0073] Among them, a limiting frame 113 is fixedly connected between two of the positioning shafts 111. The bottom of the limiting frame 113 is arc-shaped. Then, the hydraulic rod 112 is started. When the hydraulic rod 112 moves downward, it will push the sliding plate 121 to drive the upper mold 211 to move downward.

[0074] The sliding component 12 includes a sliding plate 121 slidably connected to the outer surface of the four positioning shafts 111. An assistance cavity 123 is opened inside the sliding plate 121.

[0075] Two sliding rods 122 are slidably connected inside the sliding plate 121. The two sliding rods 122 are symmetrically distributed with the assistance cavity 123 as the center. One side of the sliding rod 122 close to the assistance cavity 123 is inclined. When the sliding plate 121 drives the upper mold 211 to move downward and close with the lower mold 101, the top of the lower mold 101 will generate an upward driving force on the bottom of the round plate 232. At this time, under the action of the driving force, the round plate 232 will push the two sliding rods 122 to slide outward through the conical shaft 231.

[0076] The limiting member includes the upper mold 211 fixedly connected to the bottom of the sliding plate 121. Four receiving grooves 214 are formed in the inner wall of the top of the upper mold 211, and four rectangular grooves 212 are formed in the inner wall of the upper mold 211;

[0077] The shrouding assembly 21 includes a sliding groove 213 formed on one side of the rectangular groove 212 away from the middle of the upper mold 211;

[0078] A limiting shaft 201 is fixedly connected inside the rectangular groove 212.

[0079] The fixing member includes a plurality of spring telescopic rods 221 fixedly connected to the outer wall of the bottom of the upper mold 211. The bottom of the plurality of spring telescopic rods 221 is fixedly connected with a fixing ring 222;

[0080] The downward moving assembly 22 includes a rotating ring 223 rotatably connected to the outer surface of the fixing ring 222. A circular ring groove is formed at the top of the rotating ring 223, and a plurality of inclined plates are fixedly connected inside the circular ring groove;

[0081] The moving assembly 23 includes a conical shaft 231 arranged inside the upper mold 211. The top of the conical shaft 231 slides through to the inside of the assistance cavity 123, and the bottom of the conical shaft 231 is fixedly connected with a round plate 232;

[0082] A plurality of L-shaped plates 233 are fixedly connected to the top of the round plate 232. The outer surface of the conical shaft 231 inside the assistance cavity 123 is in contact with the inclined surfaces of the sliding rods 122. At this time, the two sliding rods 122 will move relatively. When the two sliding rods 122 move, they will squeeze the inclined surface of the conical shaft 231, thereby forcing the conical shaft 231 to drive the round plate 232 to slide downward. When the round plate 232 slides downward, it will push the top of the plastic product downward.

[0083] The elastic plate 301 is slidably connected to the outer surface of the limiting shaft 201. The bottom of the elastic plate 301 is inclined, and the bottom of the elastic plate 301 is slidably arranged inside the circular ring groove;

[0084] Three notch grooves 302 are formed in the side wall of the elastic plate 301;

[0085] The elastic component 31 includes a long rod 311 fixedly connected to the outer wall of the elastic plate 301 near one side of the sliding groove 213. Two reset springs are fixedly connected to the outer surface of the long rod 311. When the long rod 311 slides downward, the two reset springs on the surface of the long rod 311 will push the C-shaped frame 321 at the top to rotate. When the C-shaped frame 321 at the top rotates downward, it will push the other two C-shaped frames 321 to rotate synchronously through the connecting rod 322.

[0086] Three limiting rods 312 are arranged on both the left and right sides of the elastic plate 301. The limiting rods 312 are rotatably connected to the side wall of the rectangular groove 212;

[0087] The friction component 32 includes a C-shaped frame 321 fixedly connected between the two limiting rods 312. A torsion spring is fixedly connected to the side wall of the C-shaped frame 321 outside the limiting rod 312. The outer surface of the torsion spring is fixedly connected to the side wall of the rectangular groove 212;

[0088] Among them, two connecting rods 322 are rotatably connected between the two C-shaped frames 321. The two connecting rods 322 are symmetrically distributed with the C-shaped frame 321 as the center;

[0089] Among them, one end of the two reset springs away from the long rod 311 is fixedly connected to the side wall of the topmost C-shaped frame 321. At the same time, when the C-shaped frame 321 rotates, it will also compress the torsion spring on the side wall and enable the torsion spring to accumulate elastic potential energy when the C-shaped frame 321 rotates, so that when the elastic plate 301 moves upward, it can drive the C-shaped frame 321 to reset and make the C-shaped frame 321 retract into the notch groove 302. When multiple C-shaped frames 321 rotate under the action of spring potential energy, the front ends of the multiple rotating C-shaped frames 321 can adapt to the curvature of the product surface when the plastic product is demolded.

[0090] During use, first place the raw material to be compression-molded on the top of the lower mold 101, and then start the hydraulic rod 112. When the hydraulic rod 112 moves downward, it will push the sliding plate 121 to drive the upper mold 211 to move downward. When the upper mold 211 moves downward, it will cover the surface of the lower mold 101 and compress the raw material during the closing process with the lower mold 101 to achieve the purpose of compression molding.

[0091] When the sliding plate 121 drives the upper mold 211 to move downward and close with the lower mold 101, an upward driving force will be generated on the bottom of the circular plate 232 by the top of the lower mold 101. At this time, under the action of the driving force, the circular plate 232 will push the two sliding rods 122 outward through the conical shaft 231. When the compression molding is completed and demolding begins, the hydraulic rod 112 will drive the sliding plate 121 and the upper mold 211 to move upward together with the plastic product inside. When the sliding plate 121 moves upward to the moving position, the sliding rod 122 will contact the arc surface at the bottom of the limit frame 113. Then, when the hydraulic rod 112 drives the sliding plate 121 to continue moving upward, the arc surface at the bottom of the limit frame 113 will generate a sliding force on the sliding rod 122 to make it slide in the direction of the assistance cavity 123. At this time, the two sliding rods 122 will move relatively. When the two sliding rods 122 move, they will squeeze the inclined surface of the conical shaft 231, thereby forcing the conical shaft 231 to drive the circular plate 232 to slide downward. When the circular plate 232 slides downward, it will push the top of the plastic product downward. At the same time, when the circular plate 232 moves downward, it will also push the top of the elastic plate 301 downward through the L plate 233 at the top. When the elastic plate 301 starts to be pressed downward by the L plate 233, the L plate 233 will slide downward on the surface of the limit shaft 201 and at the same time push the rotating ring 223 to drive the fixed ring 222 and the spring telescopic rod 221 to slide downward through the inclined surface at the bottom. At the same time, the inclined surface at the bottom of the elastic plate 301 will squeeze the inclined surface of the inclined plate inside the circular ring groove during the downward slide, enabling the inclined plate to drive the rotating ring 223 to rotate on the surface of the fixed ring 222 after being squeezed. When the rotating ring 223 moves downward and rotates, it will push the skirt of the plastic product downward and at the same time drive the plastic product to rotate in the mold cavity, thereby being able to break the adhesion between the plastic product and the mold cavity wall. Combining with the rotation during the downward slide demolding of the plastic product can further reduce the demolding resistance during demolding, reduce the situation of difficult demolding caused by the adhesion between the product and the upper mold cavity, save time and improve the subsequent collection of the product and the compression molding time and efficiency of the subsequent raw materials.

[0092] When the top of the elastic plate 301 is squeezed and slides downward on the surface of the limit shaft 201, it will drive the long rod 311 to slide synchronously. When the long rod 311 slides downward, the two return springs on the surface of the long rod 311 will push the C-shaped frame 321 at the top to rotate. When the C-shaped frame 321 at the top rotates downward, it will push the other two C-shaped frames 321 to rotate synchronously through the connecting rod 322. At this time, the multiple outwardly rotating C-shaped frames 321 will fit on the surface of the plastic product, presenting the state in the compression molding assembly 11 as shown in the figure. At this time, when the multiple C-shaped frames 321 contact the product surface, the C-shaped frame 321 can contact the product surface under the elastic potential energy of the return spring, enabling the multiple C-shaped frames 321 to form a multi-point frictional force on the product surface. At this time, when the product is demolded and slides down, the C-shaped frame 321 can slow down the sliding speed of the plastic product through the frictional force between the multiple C-shaped frames 321 and the product surface. By restricting the sliding speed of the plastic product during demolding with multiple C-shaped frames 321, it is possible to reduce the damage or deformation caused by the product colliding with the lower mold 101 or surrounding structures during free fall due to too fast sliding speed during demolding, thereby improving the integrity during product demolding and maintaining the appearance quality of the product after compression molding and demolding.

[0093] When the C-shaped frame 321 flips and contacts the surface of the plastic product, and the C-shaped frame 321 has not completed the rotation completely, the downward sliding of the long rod 311 will cause the return spring to be compressed between the long rod 311 and the C-shaped frame 321. Subsequently, the C-shaped frame 321 can closely adhere to the surface of the plastic product during the demolding and sliding of the product under the potential energy of the return spring. At the same time, when the C-shaped frame 321 rotates, it will also compress the torsion spring on the side wall and enable the torsion spring to accumulate elastic potential energy when the C-shaped frame 321 rotates, so as to drive the C-shaped frame 321 to reset and retract into the inside of the notch groove 302 when the elastic plate 301 moves upward. When multiple C-shaped frames 321 rotate under the action of spring potential energy, the front ends of the multiple rotating C-shaped frames 321 can adapt to the curvature of the product surface during the demolding of the plastic product, and thus can further restrict the sliding speed of the product during demolding by adapting to the shape of the product surface. At the same time, after demolding, the C-shaped frame 321 can quickly reset and fit with the notch groove 302 under the elastic potential energy of the torsion spring, thereby reducing the contact between the C-shaped frame 321 and the raw material on the lower mold 101 during the next compression molding, and ensuring the stability of the subsequent compression molding.

[0094] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A plastic product processing compression molding device, including a main body (1), wherein a lower mold (101) is bolted to the inner wall of the bottom of the main body (1), characterized in that, Further comprising; A demolding mechanism (2), which is installed on the top of the main body (1) and is used to close with the lower mold (101); An auxiliary mechanism (3), which is installed inside the demolding mechanism (2) and is used to control the demolding speed when demolding the compression molded product; When the demolding mechanism (2) demolds the compression molded plastic product, the demolding speed of the product can be controlled through the movement of the auxiliary mechanism (3).

2. The plastic product processing compression molding device according to claim 1, characterized in that: The main body (1) includes: A compression molding component (11), which is installed on the top of the main body (1); A sliding component (12), which is slidably arranged outside the compression molding component (11).

3. A plastic product processing compression molding device according to claim 2, characterized in that: The demolding mechanism (2) includes: A shrouding component (21), which is installed at the bottom of the sliding component (12) through a limiting member; A downward moving component (22), which is installed at the bottom of the shrouding component (21) through a fixing member; A moving component (23), which is installed inside the shrouding component (21).

4. A plastic product processing compression molding device according to claim 3, characterized in that: The auxiliary mechanism (3) includes a plurality of elastic plates (301) installed inside the shrouding component (21), and the auxiliary mechanism (3) includes: An elastic component (31), which is installed outside the elastic plate (301); A friction component (32), which is installed outside the elastic component (31).

5. A plastic product processing compression molding device according to claim 1, characterized in that: The compression molding component (11) includes four positioning shafts (111) fixedly connected to the top of the main body (1). A square block is fixedly connected to the top of the four positioning shafts (111), and a hydraulic rod (112) is fixedly connected to the bottom of the square block; Among them, a limiting frame (113) is fixedly connected between the two positioning shafts (111), and the bottom of the limiting frame (113) is arc-shaped.

6. A plastic product processing compression molding device according to claim 5, characterized in that: The sliding component (12) includes a sliding plate (121) slidably connected to the outer surfaces of the four positioning shafts (111). An assistance cavity (123) is opened inside the sliding plate (121); Two sliding rods (122) are slidably connected inside the sliding plate (121). The two sliding rods (122) are symmetrically distributed with the assistance cavity (123) as the center, and one side of the sliding rod (122) close to the assistance cavity (123) is inclined.

7. The plastic product processing compression molding device according to claim 6, characterized in that: The limiting member includes an upper mold (211) fixedly connected to the bottom of the sliding plate (121). Four receiving grooves (214) are opened on the inner wall of the top of the upper mold (211), and four rectangular grooves (212) are opened on the inner wall of the upper mold (211); The shrouding component (21) includes a sliding groove (213) opened on one side of the rectangular groove (212) away from the middle of the upper mold (211); A limiting shaft (201) is fixedly connected inside the rectangular groove (212).

8. The compression molding device for plastic product processing according to claim 7, characterized in that: The fixing member includes a plurality of spring telescopic rods (221) fixedly connected to the outer wall of the bottom of the upper die (211), and a fixing ring (222) is fixedly connected to the bottom of the plurality of spring telescopic rods (221); The downward moving assembly (22) includes a rotating ring (223) rotatably connected to the outer surface of the fixing ring (222). A circular ring groove is formed at the top of the rotating ring (223), and a plurality of inclined plates are fixedly connected to the inside of the circular ring groove; The moving assembly (23) includes a conical shaft (231) disposed inside the upper die (211). The top of the conical shaft (231) slidably penetrates into the assistance cavity (123), and a circular plate (232) is fixedly connected to the bottom of the conical shaft (231); A plurality of L-shaped plates (233) are fixedly connected to the top of the circular plate (232). The outer surface of the conical shaft (231) located inside the assistance cavity (123) is in contact with the inclined surface of the sliding rod (122).

9. A plastic product processing compression molding device according to claim 4, characterized in that: The elastic plate (301) is slidably connected to the outer surface of the limiting shaft (201). The bottom of the elastic plate (301) is inclined, and the bottom of the elastic plate (301) is slidably disposed inside the circular ring groove; Three notch grooves (302) are formed in the side wall of the elastic plate (301); The elastic assembly (31) includes a long rod (311) fixedly connected to the outer wall of the elastic plate (301) close to the sliding groove (213). Two return springs are fixedly connected to the outer surface of the long rod (311).

10. A plastic product processing compression molding device according to claim 4, characterized in that: Three limiting rods (312) are disposed on both the left and right sides of the elastic plate (301). The limiting rods (312) are rotatably connected to the side wall of the rectangular groove (212); The friction assembly (32) includes a C-shaped frame (321) fixedly connected between the two limiting rods (312). A torsion spring is fixedly connected to the side wall of the C-shaped frame (321) located outside the limiting rod (312), and the outer surface of the torsion spring is fixedly connected to the side wall of the rectangular groove (212); Wherein, two connecting rods (322) are rotatably connected between the two C-shaped frames (321), and the two connecting rods (322) are symmetrically distributed with the C-shaped frame (321) as the center; Wherein, one end of the two return springs away from the long rod (311) is fixedly connected to the side wall of the topmost C-shaped frame (321).

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