A mold and process for integrally molding a plastic automotive trim part with a surface applique

Abstract

The application relates to the technical field of injection molding equipment, in particular to a mold for integrally molding an automobile plastic decoration part and a surface cloth and a process thereof; the mold comprises, from top to bottom, a top die, an upper die, a lower die and a bottom plate; the top die is connected with the upper die through sound-absorbing cotton; the lower die is fixedly connected with the bottom plate; the lower surface of the upper die is provided with an upper cavity; the upper surface of the lower die is provided with a lower cavity corresponding to the upper cavity; the upper cavity and the lower cavity are combined to form a molding cavity; a plurality of lower support grooves are arranged on the inner bottom wall of the lower cavity; a lower support strip is slidably and sealingly connected in the lower support groove; a lower driving groove is arranged in the lower die; a lower driving plate is slidably and sealingly connected in the lower driving groove; the lower support strip at the lower position of the molding cavity props up the fabric in the molding cavity, so that the fabric is in the central position of the molding cavity before material is injected into the molding cavity, and the fabric in the molded part has better wrapping performance, and the quality of the molded part is improved.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, specifically to a mold and process for integrally molding automotive plastic decorative parts and surface coatings. Background Technology

[0002] Traditional automotive interior trim fabric bonding processes typically use adhesives to bond fabric to injection-molded parts. Over time, the adhesive ages, causing the fabric to separate from the molded part, forming bulges that affect aesthetics and safety. Furthermore, the use of adhesives can introduce formaldehyde pollution, impacting in-vehicle air quality. With technological advancements, in-mold injection molding technology integrates the fabric directly with the injection-molded part within the mold, eliminating the need for adhesives, solving the separation problem, extending service life, reducing formaldehyde pollution, and improving in-vehicle air quality.

[0003] Specifically, the fabric is first placed in the mold cavity, then the mold is closed, and the injection molding equipment injects the rubber material into the mold cavity along the injection channel. The rubber material comes into contact with the fabric in the cavity, and after cooling, it is molded as a single piece. Although this method avoids some drawbacks of traditional processes, such as poor adhesion and formaldehyde pollution, new problems have also emerged in actual operation. For example, the fabric is affected by gravity and comes into contact with the mold wall, resulting in poor wrapping after molding and easy exposure of the fabric. In addition, the material flow during injection causes the fabric to shift, affecting the molding effect. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a mold and process for integrally molding automotive plastic decorative parts and surface fabric. This invention uses a lower support strip located at the bottom of the cavity to support the fabric inside the cavity, so that the fabric is in the center of the cavity before the material is injected into the cavity, thereby making the fabric in the molded part have better wrapping properties and improving the quality of the molded part.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A mold for integrally molding automotive plastic decorative parts and surface adhesive fabric, comprising a top mold, an upper mold, a lower mold, and a base plate arranged sequentially from top to bottom; the top mold is connected to the upper mold via sound-absorbing cotton; the lower mold is fixedly connected to the base plate; the lower surface of the upper mold has an upper cavity; the upper surface of the lower mold has a lower cavity corresponding to the upper cavity; the upper cavity and the lower cavity combine to form a cavity; the bottom wall of the lower cavity has multiple lower support grooves; a lower support strip is slidably and sealingly connected within the lower support groove; a lower drive groove is provided inside the lower mold; the lower drive groove is slidably and sealingly connected to a lower drive plate; the lower surface of the lower drive plate and the lower inner wall of the lower drive groove are connected by a lower spring; the upper inner wall of the lower drive groove and the lower support groove are connected through a lower support hole; the lower surface of the top mold abuts against the upper surface of the lower drive plate via a guide post.

[0006] Preferably, the upper cavity has a plurality of upper support grooves on its inner top wall; an upper support strip is slidably and sealingly connected to the upper support groove; an upper drive groove is provided inside the upper mold; an upper drive plate is slidably connected to the upper drive groove; the lower surface of the upper drive plate is connected to the lower inner wall of the upper drive groove by an upper spring; the upper inner wall of the upper drive groove is connected to the bottom of the upper support groove by an upper support hole; the lower end of the guide post passes through the upper mold and is fixedly connected to the upper surface of the upper drive plate; the guide post is movably and sealingly connected to the upper mold; the upper surface of the lower drive plate is provided with a lower abutment rod that passes through the lower mold and is movably and sealingly connected to the lower mold; the upper drive plate is fixedly connected to the upper abutment rod, and the lower drive plate is fixedly connected to the lower abutment rod.

[0007] Preferably, the bottom wall of the lower cavity is provided with a lower storage groove; a lower storage strip is slidably and sealingly connected in the lower storage groove; the number of lower storage grooves is the same as the number of lower support grooves; the lower storage groove is located close to the corresponding lower support groove; the lower storage groove communicates with the lower inner wall of the lower drive groove through a lower storage hole; the top wall of the upper cavity is provided with an upper storage groove; an upper storage strip is slidably and sealingly connected in the upper storage groove; the number of upper storage grooves is the same as the number of upper support grooves; the upper storage groove is located close to the corresponding lower support groove; the upper storage groove communicates with the lower inner wall of the upper drive groove through an upper storage hole.

[0008] Preferably, the upper storage groove is closer to the cavity center than the adjacent upper support groove; the lower storage groove is closer to the cavity center than the adjacent lower support groove.

[0009] Preferably, the two mutually spaced lower support bars have a lower binding hole at their upper ends; the lower binding hole is movably and sealingly connected to a lower binding rod; the bottom of the lower binding hole passes through the lower end of the lower support bar; the lower support bar is connected to the bottom of the lower support groove by a lower support spring; the upper support bar is connected to the bottom of the upper support groove by an upper support spring.

[0010] Preferably, the inner wall of the lowering hole is provided with a spiral groove; the spiral groove is spiral-shaped, and a movable block is movably and sealed within the spiral groove; the movable block is fixedly connected to the outer wall of the lowering rod.

[0011] Preferably, the two upper support bars that are far apart from each other are arranged in an inverted V-shape; the two lower support bars that are far apart from each other are arranged in a regular V-shape.

[0012] Preferably, the upper surface of the lower mold is provided with an adjustment hole; the adjustment hole is provided with a threaded hole that communicates with the lower drive groove; a bolt is sealed and connected to the threaded hole through the threaded hole.

[0013] A process for integrally molding automotive plastic trim parts and surface laminates is disclosed. This process is applicable to the molds used for integrally molding automotive plastic trim parts and surface laminates, and the steps of this process are as follows:

[0014] S1: After washing and drying the fabric, place the fabric on the upper end of the lower support strip in the lower cavity, control the upper mold to move down and contact the lower mold, and the upper support strip presses against the lower support strip through the fabric;

[0015] S2: The molten material is injected into the cavity along the injection channel. The material will fill the space around the fabric in the cavity as well as the recessed positions of the upper and lower storage slots.

[0016] S3: Control the top mold to move down, which will drive the upper drive plate and the lower drive plate to move down. The upper support bar and the lower support bar will move away from the cavity. The upper storage groove and the lower storage groove will push the material into the cavity.

[0017] S4: After the fabric and material in the cavity cool and solidify to form a molded part, control the upper mold to detach from the lower mold and remove the molded part.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The present invention supports the fabric in the cavity by using a lower support strip located at the bottom of the cavity, so that the fabric is in the center of the cavity before the material is injected into the cavity, thereby improving the fabric wrapping properties in the molded part and improving the quality of the molded part.

[0020] 2. The present invention clamps the fabric by using an upper support strip at the upper position and a lower support strip at the lower position in the cavity, thereby limiting the fabric during the process of material entering the cavity, preventing the fabric from shifting due to material flow, and further improving the quality of the molded part.

[0021] 3. During the process of the upper and lower support bars being removed from the cavity, the material in the upper and lower storage tanks can be replenished in a timely manner to avoid fabric displacement caused by material feeding into the injection channel. Replenishing nearby reduces the flow of material in the cavity, thereby minimizing fabric movement caused by the upper and lower support bars being removed from the fabric and further improving the quality of the molded parts. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a perspective view of the mold after installation in this invention;

[0024] Figure 2 This is a perspective view of the mold in this invention;

[0025] Figure 3 This is a diagram of the internal structure of the mold in this invention;

[0026] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0028] Figure 6 yes Figure 3 Enlarged view of point C in the middle;

[0029] Figure 7 This is a process flow diagram of the present invention.

[0030] In the diagram: Top mold 1, sound-absorbing cotton 11, guide post 12, upper mold 2, upper cavity 21, cavity 22, upper support groove 23, upper support hole 231, upper drive groove 25, upper drive plate 26, upper spring 261, upper abutment bar 262, upper storage groove 27, upper storage bar 271, upper storage hole 272, lower mold 3, lower cavity 31, lower support groove 32, lower support hole 321, lower drive groove 33, lower drive plate 34, lower spring 341, lower abutment bar 342, lower storage groove 35, lower storage bar 351, lower storage hole 352, adjusting hole 36, threaded hole 37, bolt 38, base plate 4, injection channel 41, lower support bar 5, lower binding hole 51, lower binding bar 52, lower support spring 53, spiral groove 54, movable block 55, upper support bar 6, upper support spring 61. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figures 1 to 7 As shown, the present invention includes the following embodiments:

[0033] Example 1: A mold for integrally molding automotive plastic trim parts and surface adhesive fabric includes a top mold 1, an upper mold 2, a lower mold 3, and a base plate 4 arranged sequentially from top to bottom; the top mold 1 is connected to the upper mold 2 via sound-absorbing cotton 11; the lower mold 3 is fixedly connected to the base plate 4; the lower surface of the upper mold 2 is provided with an upper cavity 21; the upper surface of the lower mold 3 is provided with a lower cavity 31 corresponding to the upper cavity 21; the upper cavity 21 and the lower cavity 31 are combined to form a cavity 22; the bottom wall of the lower cavity 31 is provided with... There are multiple lower support grooves 32; a lower support strip 5 is slidably and sealingly connected inside the lower support groove 32; a lower drive groove 33 is provided inside the lower mold 3; the lower drive groove 33 is slidably and sealingly connected to the lower drive plate 34; the lower surface of the lower drive plate 34 is connected to the lower inner wall of the lower drive groove 33 by a lower spring 341; the upper inner wall of the lower drive groove 33 is connected to the lower support groove 32 through a lower support hole 321; the lower surface of the top mold 1 abuts against the upper surface of the lower drive plate 34 through a guide post 12.

[0034] In this embodiment, the upper cavity 21 has a plurality of upper support grooves 23 on its inner top wall; an upper support strip 6 is slidably and sealingly connected to the upper support groove 23; an upper drive groove 25 is provided inside the upper mold 2; an upper drive plate 26 is slidably connected to the upper drive groove 25; the lower surface of the upper drive plate 26 is connected to the lower inner wall of the upper drive groove 25 by an upper spring 261; the upper inner wall of the upper drive groove 25 is connected to the bottom of the upper support groove 23 by an upper support hole 231; the lower end of the guide post 12 passes through... The upper mold 2 is fixedly connected to the upper surface of the upper drive plate 26; the guide post 12 is movably and sealedly connected to the upper mold 2; the lower surface of the upper drive plate 26 is provided with an upper abutment 262 that passes through the upper mold 2 and is movably and sealedly connected to the upper mold 2; the upper surface of the lower drive plate 34 is provided with a lower abutment 342 that passes through the lower mold 3 and is movably and sealedly connected to the lower mold 3; the upper drive plate 26 is fixedly connected to the upper abutment 262, and the lower drive plate 34 is fixedly connected to the lower abutment 342; the positions and cross-sections of the upper abutment 262 and the lower abutment 342 are corresponding.

[0035] After the mold is installed on the injection molding equipment, the top mold 1 is driven upward by the driving device in the injection molding equipment, such as a hydraulic cylinder. During the upward movement of the top mold 1, the guide column 12 is driven and the upper mold 2 is pulled upward. After the upper mold 2 moves upward, it will disengage from the lower mold 3, creating a gap between the upper mold 2 and the lower mold 3. After the upper mold 2 and the lower mold 3 disengage, the lower support strip 5 in the lower cavity 31 is in the state of extending out of the lower support groove 32. Then, the fabric is placed on the upper end of the multiple lower support strips 5, which will support the fabric. Next, the top mold 1 is controlled to move downward. During the downward movement of the top mold 1, the guide column 12 and the upper mold 2 will move downward. During the downward movement of the upper mold 2, the upper support strip 6 will move downward. The multiple upper support strips 6 are located in the corresponding multiple The upper support strip 6 rests directly above the lower support strip 5 and ultimately rests on the upper surface of the fabric. The upper support strip 6 will abut against the corresponding lower support strip through the fabric. Since the upper support strip 6 extends out of the upper cavity 21 and the lower support strip 5 extends out of the lower cavity 31 in the initial state, but the fabric occupies a certain thickness, the upper support strip 6 will be pressed and slide along the upper support groove 23 and slightly approach the bottom of the upper support groove 23. The liquid or gas medium in the upper support groove 23 flows into the upper drive groove 25 along the upper support hole 231. The upper drive plate 26 divides the upper drive groove 25 into an upper cavity at the upper position and an upper second cavity at the lower position. Therefore, the medium in the upper support groove 23 will flow into the upper cavity along the upper support hole 231. The upper drive plate 26 will overcome the upper spring 261 and move down in the upper drive groove 25. After the upper mold 2 is placed on the lower mold 3, the lower support bar 5 will also move downward. During the downward movement of the lower support bar 5, it will move along the lower support groove 32 and slightly squeeze the liquid or gas medium in the lower support groove 32. The lower drive plate 34 divides the lower drive groove 33 into an upper lower cavity and a lower lower second cavity. Therefore, the medium in the lower support groove 32 will flow into the upper cavity along the lower support hole 321. The lower drive plate 34 will slide and move downward along the lower drive groove 33 under pressure. After the upper mold 2 and the lower mold 3 are put together, a seal is achieved. The upper cavity 21 and the lower cavity 31 are put together to form a cavity 22. The fabric in the cavity 22 is clamped by the upper support bar 6 and the lower support bar 5. The lower cavity 31 is provided with an injection channel 41 extending downward. After the gas in the cavity 22 is extracted, the molten material will... The material is injected into the cavity 22 along the injection channel 41. Since the fabric in the cavity 22 is supported by the lower support bar 5, the fabric will not come into contact with the inner wall of the cavity 22. Since the fabric in the cavity 22 is clamped by the upper support bar 6 and the lower support bar 5, the fabric will not shift or wrinkle during the injection of material into the cavity 22, thus ensuring the stability of the fabric position in the cavity 22. As the amount of material in the cavity 22 increases, the material will fill the space around the fabric. The material has poor flowability, which limits the sinking and movement of the fabric. Then, the top mold 1 is controlled to move further down. The top mold 1 will drive the guide column 12 to move down. The sound-absorbing cotton 11 between the top mold 1 and the upper mold 2 can be compressed and absorbs sound during the mold closing process to achieve the purpose of noise reduction.When the upper mold 2 is engaged with the lower mold 3, the downward movement of the top mold 1 will cause the guide post 12 to move downward. The guide post 12 will push the upper drive plate 26 to slide and move downward within the upper drive groove 25. The upper drive plate 26 will overcome the upper spring 261 and move downward, causing the upper cavity space to expand and form a negative pressure. The medium in the upper support groove 23 is pressurized and flows into the upper cavity along the upper support hole 231. This causes the upper support bar 6 to eventually retract into the upper support groove 23. During the downward movement of the upper drive plate 26, it will drive the upper abutment 262 to move downward. The upper abutment 262 will squeeze the lower abutment 342 and drive the lower drive plate 34 to move downward. The lower cavity space expands and forms a negative pressure. The medium in the lower support groove 32 flows into the lower cavity along the lower support hole 321. The lower support bar 5 will retract into the lower support groove 32, thus ensuring the smoothness of the inner wall of the cavity 22. During the retraction of the upper support bar 6 and the lower support bar 5... During the process, the material flow in cavity 22 is relatively poor, which can better restrict the fabric, realize the limiting and support of the fabric, and ensure that the fabric after molding is located in the center of the material, improve the wrapping effect of the fabric after molding, and improve the quality of the molded part. After the molded part cools and solidifies, the top mold 1 and the upper mold 2 are controlled to move upward. The upper spring 261 pushes the upper drive plate 26 to move upward in the upper drive groove 25, so that the upper support bar 6 extends out from the upper support groove 23, thereby pushing the molded part out from the upper cavity 21, realizing rapid demolding. The lower spring 341 also pushes the lower drive plate 34 to move upward in the lower drive groove 33, so that the lower support bar 5 is pressed and extends out along the lower support groove 32, so that the molded part in the lower cavity 31 is pushed out, realizing rapid demolding of the upper cavity 21 and the lower cavity 31. Finally, the molded part can be removed.

[0036] In this embodiment, a fabric material with good compatibility with plastic materials is selected to ensure that the fabric and plastic materials can be fully bonded during the injection molding process and to avoid separation.

[0037] In this embodiment, the lower support strip 5 at the lower position of the cavity 22 supports the fabric in the cavity 22, so that the fabric is in the center of the cavity 22 before the material is injected into the cavity 22, thereby making the fabric in the molded part better wrapped and improving the quality of the molded part.

[0038] In this embodiment, the upper support strip 6 at the upper position and the lower support strip 5 at the lower position in the cavity 22 clamp the fabric, thereby limiting the fabric during the process of the material entering the cavity 22, preventing the fabric from shifting due to material flow, and further improving the quality of the molded part.

[0039] Example 2: A lower storage groove 35 is provided on the bottom wall of the lower cavity 31; a lower storage strip 351 is slidably and sealingly connected in the lower storage groove 35; the number of lower storage grooves 35 is the same as the number of lower support grooves 32; the lower storage grooves 35 are located close to the corresponding lower support grooves 32; the lower storage grooves 35 are connected to the lower inner wall of the lower drive groove 33 through lower storage holes 352; an upper storage groove 27 is provided on the top wall of the upper cavity 21; an upper storage strip 271 is slidably and sealingly connected in the upper storage groove 27; the number of upper storage grooves 27 is the same as the number of upper support grooves 23; the upper storage grooves 27 are located close to the corresponding lower support grooves 32; the upper storage grooves 27 are connected to the lower inner wall of the upper drive groove 25 through upper storage holes 272; the upper storage holes 272 and upper support holes 231 are offset in the front-back direction, and the lower storage holes 352 and lower support holes 321 are offset in the front-back direction.

[0040] In this embodiment, the upper storage groove 27 is closer to the center of the cavity 22 than the adjacent upper support groove 23; the lower storage groove 35 is closer to the center of the cavity 22 than the adjacent lower support groove 32.

[0041] Before the upper mold 2 and lower mold 3 are closed, the upper support strip 6 in the upper cavity 21 is in the state of extending out of the upper support groove 23, and the upper retaining strip 271 is in the state of retracting into the upper retaining groove 27, with the upper retaining strip 271 recessed in the upper retaining groove 27. The lower support strip 5 in the lower cavity 31 is in the state of extending out of the lower support groove 32, with the lower retaining strip 351 recessed in the lower retaining groove 35. As the upper mold 2 and lower mold 3 are closed, the material is injected into the cavity 22 along the injection channel 41. The material fills the space around the fabric sandwiched between the upper support strip 6 and the lower support strip 5, and also enters the recessed upper retaining groove 27. The material is stored in the lower storage tank 35. Then, the feeding of the injection channel 41 is stopped, and the top mold 1 is directly controlled to move downward. During the downward movement of the top mold 1, the upper drive plate 26 and the lower drive plate 34 will move downward. The downward movement of the upper drive plate 26 will cause the upper cavity to expand and the upper second cavity to shrink. Under the negative pressure formed inside the upper support groove 23, the upper support bar 6 will retract into the upper support groove 23. The liquid or gas medium in the upper second cavity will be injected into the upper storage tank 27 along the upper storage hole 272, thereby causing the upper storage bar 271 in the upper storage tank 27 to be pushed out. The upper storage bar 271 will release the material stored in the upper storage tank 27. As material is ejected, since the upper storage tank 27 is close to the corresponding upper support tank 23, the material will replenish the cavity 22 space of the nearby upper support bar 6 retracted from the upper storage tank 27. Similarly, during the downward movement of the lower drive plate 34, the lower cavity expands and the lower second cavity shrinks. The lower support bar 5 retracts into the lower support tank 32 under the negative pressure formed inside the lower support tank 32. The liquid medium in the lower second cavity is pressurized and injected into the lower storage tank 35 along the lower storage hole 352, thereby causing the lower storage bar 351 in the lower storage tank 35 to be ejected. The lower storage bar 351 will eject the material stored in the lower storage tank 35. Since the lower storage groove 35 is close to the corresponding lower support groove 32, the material will replenish the cavity 22 space of the nearby lower support bar 5 from the lower storage groove 35. In this way, when the upper support bar 6 and the lower support bar 5 move away from the cavity 22, the material in the upper storage groove 27 and the lower storage groove 35 can be replenished in time to avoid fabric displacement caused by single-position feeding in the injection channel 41. The nearby replenishment will reduce the flow of material in the cavity 22, thereby minimizing the fabric movement caused by the upper support bar 6 and the lower support bar 5 moving away from the fabric, and further improving the quality of the molded part.

[0042] Furthermore, since the upper storage groove 27 is closer to the center of the cavity 22 than the adjacent upper support groove 23, the material flowing out of the upper storage groove 27 and replenishing the adjacent upper support bar 6 at the position away from the cavity 22 flows away from the center of the cavity 22. Similarly, the material flowing out of the lower storage groove 35 and replenishing the adjacent lower support bar 5 at the position away from the cavity 22 also flows away from the center of the cavity 22. With the material flow on the left and right sides of the cavity 22 balanced, the displacement of the fabric in the cavity 22 with injected material is minimized as much as possible, so as to further improve the quality of the molded part.

[0043] In this embodiment, the upper cavity and the upper second cavity change by the same amount as the upper drive plate 26 moves up and down, and the retraction space of the upper support bar 6 is the same as the amount of material pushed out by the upper storage bar 271; in this embodiment, the lower cavity and the lower second cavity change by the same amount as the retraction space of the lower drive plate 34, and the retraction space of the lower support bar 5 is the same as the amount of material pushed out by the lower storage bar 351.

[0044] Example 3: The two mutually spaced lower support bars 5 are provided with a lower binding hole 51 at their upper ends; the lower binding hole 51 is movably and sealingly connected to the lower binding rod 52; the bottom of the lower binding hole 51 passes through the lower end of the lower support bar 5; the lower support bar 5 is connected to the bottom of the lower support groove 32 by a lower support spring 53; the upper support bar 6 is connected to the bottom of the upper support groove 23 by an upper support spring 61.

[0045] In this embodiment, the inner wall of the lowering hole 51 is provided with a spiral groove 54; the spiral groove 54 is spiral-shaped, and a movable block 55 is movably and sealed within the spiral groove 54; the movable block 55 is fixedly connected to the outer wall of the lowering rod 52.

[0046] Before the upper mold 2 and lower mold 3 are closed, the lower support bar 5 extends out of the lower support groove 32. The liquid in the lower support groove 32 enters the lower tie hole 51, so that the lower tie bar 52 extends out of the lower tie hole 51. In this way, after the fabric is placed on the upper end of multiple lower support bars 5, the lower tie bar 52 at the upper end of the lower support bar 5 can hold the fabric, achieving the purpose of anti-slip, thereby preventing the fabric from slipping off the upper end of the lower support bar 5, thus ensuring the stability of the fabric before the upper support bar 6 presses on the lower support bar 5, and improving the molding stability of the molded part. After the upper support bar 6 moves down with the upper mold 2, the upper support bar 6 will contact the lower tie bar 52 through the fabric, thereby squeezing the lower tie bar 52 down through the fabric. Under the action of the upper support spring 61, the return force of the upper support bar 6 is greater than that of the lower tie bar 52. The return force of 53 is greater than that of the lower tie rod 52, so the lower tie rod 52 will retract into the lower tie hole 51 first to avoid pressure. Furthermore, the movable block 55 on the outer wall of the lower tie rod 52 is movably connected in the spiral groove 54. Thus, during the process of the lower tie rod 52 being compressed back into the lower tie hole 51, the movable block 55 will move along the spiral groove 54, and the lower tie rod 52 will rotate. This allows the upper end of the lower tie rod 52 to pass through the fabric under rotation, further increasing the friction between the lower support bar 5 and the fabric, and improving the stability of the lower support bar 5 in placing the fabric. Subsequently, after the molten material is injected into the cavity 22 along the injection channel 41, the upper drive plate 26 and the lower drive plate 34 are controlled to move downward. After the lower tie rod 52 is completely retracted into the lower tie hole 51, the lower support bar 5 and the upper support bar 6 will be removed from the cavity 22.

[0047] In this embodiment, the upper end of the lower binding rod 52 can be tapered to improve its sharpness. After the molded part is demolded, the burrs at the corresponding position of the lower binding rod 52 can be removed.

[0048] Example 4: The two upper support bars 6, which are far apart from each other, are arranged in an inverted V-shape; the two lower support bars 5, which are far apart from each other, are arranged in a regular V-shape.

[0049] The lower end face of the upper support strip 6 and the upper end face of the lower support strip 5 are set horizontally. The lower end of the upper support strip 6 initially extends out of the upper cavity 21, and the upper end of the lower support strip 5 initially extends out of the lower cavity 31. Before mold closing, the upper support strip 6 will press against the lower support strip 5 through the fabric. As the mold closing proceeds, the upper support strip 6 will slightly retract, and the lower support strip 5 will also slightly retract. Since the two mutually distant upper support strips 6 are distributed in an inverted V-shape, and the two mutually distant lower support strips 5 are distributed in a regular V-shape, the fabric will be tightened. Note that the lower tie bar 52 is set on the two mutually distant lower support strips 5. The upper end of the middle lower support strip 5 can be smoothed to reduce friction, so that the fabric can be tightened by the two mutually distant lower support strips 5 to meet the molding requirements of the molded part.

[0050] Example 5: An adjustment hole 36 is provided on the upper surface of the lower mold 3; a threaded hole 37 communicating with the lower drive groove 33 is provided through the adjustment hole 36 downward; a bolt 38 is connected to the threaded hole 37 with internal thread sealing.

[0051] By turning the bolt 38 in the adjusting hole 36 and moving it in the threaded hole 37, the bolt 38 is made to abut against the upper surface of the lower drive plate 34, thereby limiting the upper limit position of the lower drive plate 34 in the initial state. The lower drive plate 34 moves upward by the elastic force of the lower spring 341 on the lower surface of the lower drive plate 34. Thus, the lower the lower drive plate 34 is in the initial state, the shorter the length of the lower support bar 5 extending from the lower support groove 32, so that the clamping height of the fabric in the cavity 22 can be adjusted to meet the different molding requirements of the molded parts.

[0052] Example 6: A process for integrally molding automotive plastic trim parts and surface adhesive fabric. This process is applicable to the mold used for integrally molding automotive plastic trim parts and surface adhesive fabric as described above. The steps of this process are as follows:

[0053] S1: After washing and drying the fabric, place the fabric in the lower support strip 5 near the upper end of the lower cavity 31, control the upper mold 2 to move down and contact the lower mold 3, and the upper support strip 6 presses against the lower support strip 5 through the fabric.

[0054] S2: The molten material is injected into the cavity 22 along the injection channel 41. The material will fill the space around the fabric in the cavity 22 as well as the recessed positions of the upper storage groove 27 and the lower storage groove 35.

[0055] S3: Control the top mold 1 to move down, causing the upper drive plate 26 and the lower drive plate 34 to move down, the upper support bar 6 and the lower support bar 5 to move out of the cavity 22, and the upper storage groove 27 and the lower storage groove 35 will push the material into the cavity 22.

[0056] S4: After the fabric and material in the cavity 22 have cooled and solidified to form a molded part, control the upper mold 2 to detach from the lower mold 3 and remove the molded part.

[0057] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for integrally forming a plastic trim part of an automobile and a surface covering, comprising, from top to bottom, a top die, an upper die, a lower die, and a bottom plate; characterized in that: The lower mold is fixedly connected with the bottom plate; the upper cavity on the lower surface of the upper mold and the lower cavity on the upper surface of the lower mold are combined to form a molding cavity; a plurality of lower support grooves are arranged on the inner bottom wall of the lower cavity; a lower support bar is slidably and sealingly connected in the lower support groove; a lower driving groove is arranged in the lower mold; a lower driving plate is elastically and sealingly connected to the upper and lower sides of the lower driving groove; the upper inner wall of the lower driving groove is communicated with the lower support groove through a lower support hole; the lower surface of the top mold is abutted with the upper surface of the lower driving plate through a guide column; The upper surface of the lower mold is provided with an adjusting hole; the adjusting hole is downwardly and penetratingly provided with a threaded hole communicated with the lower driving groove; a bolt is threadedly and sealingly connected in the threaded hole. The steps of the process are as follows:

2. The mold for integrally molding a surface skin and a plastic trim part of an automobile according to claim 1, wherein: S1: after the fabric is cleaned and dried, the fabric is placed on the upper end of the lower support bar in the lower cavity, the upper mold is controlled to move downward and contact the lower mold, and the upper support bar is abutted with the lower support bar through the fabric; 3. The mold for integrally molding a surface skin and a plastic trim part of an automobile according to claim 2, wherein: S2: melt material is injected into the molding cavity along the injection channel, and the material will fill the space around the fabric in the molding cavity and the recessed positions of the upper storage groove and the lower storage groove; 4. The mold for integrally molding a surface skin and a plastic trim part of an automobile according to claim 3, wherein: S3: the upper driving plate and the lower driving plate are controlled to move downward, the upper support bar and the lower support bar are moved away from the molding cavity, and the upper storage groove and the lower storage groove push the material into the molding cavity; 5. The mold for integrally molding a surface skin and a plastic trim part of an automobile according to claim 4, wherein: S4: after the fabric and the material in the molding cavity are cooled and formed into a molded part, the upper mold is controlled to be separated from the lower mold, and the molded part can be taken out.

6. The mold for integrally molding a surface skin and a plastic trim part of an automobile according to claim 5, wherein: ​ 7. A process for integrally molding automotive plastic trim parts and surface adhesive fabric, the process being applicable to the mold for integrally molding automotive plastic trim parts and surface adhesive fabric as described in any one of claims 1-6, characterized in that: ​ ​ ​ ​ ​

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