Rubber-coated part transfer injection molding mold

Abstract

This utility model discloses a transfer molding mold for rubber overmolding parts, comprising: an upper mold, a transfer mold, a mold core, and a bottom mold. The bottom mold has multiple parallel and evenly arranged mold core mounting positions, each housing a mold core. The mold core's dimensions match the mold core mounting positions, and a workpiece placement groove is provided in the center. Multiple parallel workpiece positioning seats are evenly arranged within the workpiece placement groove. The transfer mold is mounted on the bottom mold, and multiple guide protrusions with dimensions matching the corresponding workpiece placement grooves are arranged parallel to each other on its bottom. Workpiece mounting seats, corresponding one-to-one with the workpiece positioning seats on the mold core, are provided on the guide protrusions. A glue injection groove is provided on the upper surface of the transfer mold directly above each guide protrusion, and multiple glue injection holes penetrating the bottom of the groove are provided. Glue injection blocks, corresponding one-to-one with the glue injection grooves, are arranged parallel to each other on the bottom of the upper mold. Through the above method, this utility model can improve the quality and efficiency of overmolding parts and reduce the probability of mold damage.

Description

Technical Field

[0001] This utility model relates to the field of rubber coating molds, and in particular to a rubber coating part transfer molding mold. Background Technology

[0002] Rubber coating is a process in which a layer of rubber is applied to the surface of an existing metal workpiece according to actual production requirements. During the coating process, the workpiece needs to be fixed in the mold cavity without any displacement, otherwise the dimensions will be affected. The traditional solution for coating iron workpieces is to place a high-temperature magnet in the cavity of the coating mold to hold the metal part in place. However, this method makes the workpiece prone to falling off under pressure, which can damage the mold during production. Moreover, after the coating is completed, the mold needs to be opened as a whole to remove the workpiece one by one. The removal of the workpiece significantly affects the overall work efficiency. Furthermore, the rubber is subjected to less force during the coating process using traditional coating molds, resulting in a lower overall density and structural strength that is difficult to meet the actual requirements of customers. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a rubber overmolding mold that can improve overmolding efficiency and quality.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution: a rubber-coated part transfer molding mold, comprising: an upper mold, a transfer mold, a mold core, and a bottom mold. The upper mold is fixed on an upper mold base, and the transfer mold is fixed on the bottom mold. Multiple mold core mounting positions are evenly arranged parallel to each other on the bottom mold, and a replaceable mold core is installed in each mold core mounting position. The mold core mounting position is a groove on the bottom mold. The mold core includes a base plate and a guide plate. The width of the base plate matches the size of the groove. There are two guide plates, symmetrically fixed on both sides of the base plate, forming a workpiece placement groove together with the base plate. Multiple parallel workpiece positioning seats are evenly arranged in the workpiece placement groove. When the mold core is placed into the groove... The top of the guide plate is flush with the two side walls of the slide groove; the transfer mold is installed on the bottom mold, and multiple guide protrusions corresponding to the mold core mounting positions are arranged parallel to each other on the bottom of the transfer mold. The size of the guide protrusions matches the size of the workpiece placement groove of the mold core placed in the corresponding mold core mounting position. Workpiece upper brackets are provided on the guide protrusions, corresponding to the positions of multiple workpiece positioning seats in the workpiece placement groove. The workpiece positioning seats and the corresponding workpiece upper brackets are assembled together to form a complete overmolding position. A glue injection groove is provided on the upper surface of the transfer mold directly above each guide protrusion. Multiple glue injection holes penetrating the bottom of the groove and the corresponding guide protrusion are provided on the bottom of the glue injection groove. Glue injection pressure blocks corresponding to the glue injection grooves are arranged parallel to each other on the bottom of the upper mold.

[0005] In a preferred embodiment of this invention, the mold core extends symmetrically outward at both ends, with both ends partially extending beyond the slide groove to form a support structure for the mold core. Mold core positioning protrusions are symmetrically arranged at both ends of the mold core mounting position, and positioning holes corresponding to the positions of the mold core positioning protrusions are provided at both ends of the mold core. Lower guide holes are symmetrically arranged on both sides of the transfer mold, and lower guide post mounting holes corresponding one-to-one with the lower guide holes are provided on the bottom mold. During assembly, one lower guide post is installed in each lower guide post mounting hole, and the transfer mold is movably mounted on the bottom mold relying on multiple lower guide posts. The support length is 30~80mm.

[0006] In a preferred embodiment of this utility model, strong magnetic positioning plates are installed at both ends of the workpiece positioning seat.

[0007] In a preferred embodiment of this utility model, upper guide post mounting holes are symmetrically arranged on both sides of the upper mold, and a guide post is installed in each upper guide post mounting hole. The injection mold is provided with lower guide holes that correspond one-to-one with the upper guide post mounting holes.

[0008] In a preferred embodiment of this utility model, the glue injection holes and the workpiece upper brackets are staggered, and each workpiece upper bracket has one glue injection hole on each side.

[0009] The beneficial effects of this utility model are as follows: This utility model is an optimization and modification of existing overmolding molds. First, the mold is changed from a traditional injection molding mold to a transfer molding mold. The transfer molding method significantly improves the structural density of the overmolding material, thereby improving the tensile strength of the overmolding material and further meeting the customer's requirements for the comprehensive performance of the product. Second, the placement of the workpiece inside the mold is changed from the traditional vertical hanging to horizontal placement, eliminating the risk of the workpiece falling during the hanging process. Finally, the mold core is made into a replaceable mold core. In actual production, the mold core can be quickly replaced back and forth during the production process. The placement and removal of the workpiece are carried out outside the mold body. The picking and placing actions are performed at the same time as overmolding, which significantly improves the overall production efficiency. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0011] Figure 2 This is a schematic diagram of the upper pressure plate structure in the embodiment shown;

[0012] Figure 3 This is a schematic diagram of the structure after removing the upper pressure plate in the illustrated embodiment;

[0013] Figure 4 This is a schematic diagram of the bottom structure of the transfer mold in the illustrated embodiment;

[0014] Figure 5This is a schematic diagram of the structure after removing the upper pressure plate and the transfer mold in the illustrated embodiment;

[0015] The components in the attached diagram are labeled as follows:

[0016] 1. Workpiece; 2. Injection mold; 3. Mold core; 4. Upper mold; 5. Bottom mold;

[0017] 201. Injection groove; 202. Injection hole; 203. Guide protrusion; 204. Upper workpiece holder; 205. Lower guide hole; 206. Upper guide hole;

[0018] 301. Base plate; 302. Guide plate; 303. Workpiece positioning seat; 304. Strong magnetic positioning piece; 305. Positioning hole; 401. Upper guide post mounting hole; 402. Glue injection block; 501. Lower guide post mounting hole. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] Please see Figures 1 to 5 A preferred embodiment of this utility model includes:

[0021] A transfer molding die for rubber-coated parts includes: an upper mold 4, a transfer mold 2, a mold core 3, and a bottom mold 5. The upper mold 4 is fixed on an upper mold base, and the transfer mold 2 is fixed on the bottom mold 5. Three mold core mounting positions are evenly arranged parallel to each other on the bottom mold 5, and each mold core mounting position houses a replaceable mold core 3. Each mold core mounting position is a groove on the bottom mold 5. The mold core 3 includes a base plate 301 and a guide plate 302. The width of the base plate 302 matches the size of the groove. There are two guide plates 302, symmetrically fixed on both sides of the base plate 301, forming a workpiece placement groove together with the base plate 301. Eight parallel workpiece positioning seats 303 are evenly arranged in the workpiece placement groove. When the mold core 3 is placed into the groove, the top of the guide plate 302 is flush with the two side walls of the groove. The transfer mold 2 is mounted on the bottom mold 5. The bottom of the transfer mold 2 is provided with three guide protrusions 203 that correspond one-to-one with the mold core mounting positions. The size of the guide protrusions 203 matches the size of the workpiece placement slot of the mold core 3 placed in the corresponding mold core mounting position. The guide protrusions 203 are provided with workpiece upper brackets 204 that correspond one-to-one with the positions of the eight workpiece positioning seats 303 in the workpiece placement slot. The workpiece upper brackets 204 and the corresponding workpiece positioning seats 303 are assembled together to form a complete overmolding position. A glue injection groove 201 is provided on the upper surface of the transfer mold 2 directly above each guide protrusion 203. The bottom of the glue injection groove 201 is provided with nine glue injection holes 202 that penetrate the bottom of the groove and the corresponding guide protrusions 203. The glue injection holes are staggered with the workpiece upper brackets. There is one glue injection hole on each side of each workpiece upper bracket. The bottom of the upper mold 4 is provided with glue injection pressure blocks 402 that match one-to-one with the multiple glue injection grooves 201.

[0022] The mold core 6 extends symmetrically outwards at both ends, with both ends partially extending beyond the groove to form a support structure for the mold core 3. By providing support structures at both ends of the mold core 3, it is convenient to push the support structure from either end after completing one round of transfer molding to remove the mold core 3 from the mold core mounting position, and then push another mold core 3 with the workpiece 1 to be coated into the empty mold core mounting position.

[0023] The mold core mounting position is symmetrically provided with mold core positioning protrusions at both ends, and the mold core 3 has positioning holes 305 at both ends corresponding to the positions of the mold core positioning protrusions. The transfer mold 2 has four lower guide holes 205 symmetrically arranged on both sides, and the bottom mold 5 has four lower guide post mounting holes 501 corresponding to the lower guide holes 205. During assembly, one lower guide post is installed in each lower guide post mounting hole 501, and the transfer mold 2 is movably mounted on the bottom mold 5 based on the four lower guide posts. The reason for providing the mold core positioning protrusions and positioning holes 305 is that the mold core 3 is relatively long, and the alignment between the mold core 3 and the transfer mold 2 is not visible when the mold core 3 is pushed in. Alignment errors can easily occur between the workpiece mounting seat 204 and the corresponding workpiece positioning seat 303. The cooperation of the mold core positioning protrusions and positioning holes 305 at both ends allows for quick positioning during mold core 3 installation, effectively preventing alignment errors during overmolding. Due to the positioning protrusions on the mold core, when the mold core 3 is installed, the entire mold core 3 will first be pushed upwards by the positioning protrusions until it reaches the positioning position before fully resetting. Therefore, the transfer mold 2 and the bottom mold 4 cannot be completely fixed together. The resistance during the installation process of the mold core 3 can be reduced by moving it up and down along the longitudinal direction of the guide plate. The length of the support structure is 30~80mm. In practical applications, the length of the support is 50mm. If the length is insufficient, it will be inconvenient to push out; if the length is too long, it will take up too much space.

[0024] The workpiece positioning seat 303 is equipped with strong magnetic positioning plates 304 at both ends. When the workpiece 1 is placed in, it can be attracted and corrected by the strong magnetic positioning plates 304 from both ends, which facilitates the coating and significantly improves the workpiece placement efficiency of on-site personnel.

[0025] The upper mold 4 has four symmetrical upper guide post mounting holes 401 on each side. During glue injection, one guide post is installed in each upper guide post mounting hole 401. The injection mold 2 has upper guide holes 206 that correspond one-to-one with the upper guide post mounting holes 401. In this way, when the upper mold 4 is pressed down, the guide post first enters the corresponding upper guide hole 206, improving the accuracy of the pressing action and preventing the glue injection block 402 from shifting, which could damage the mold.

[0026] The working process of this embodiment is as follows:

[0027] The first step is to place the workpiece 1 to be coated into the mold core 3, with one workpiece positioning seat 304 placed inside each workpiece. Then, the mold core 3 is installed into the empty mold core mounting position. After the mold core positioning hole 305 is aligned with the positioning protrusion below, the injection mold 2 sinks down. The workpiece positioning seats 304 on the mold core 3 can just fit together with the workpiece upper clamping seat 204 on the injection mold 2 to form the coating position.

[0028] The second step is to place a rubber sheet into the injection groove 201, and then the upper mold 4 is pressed down as a whole until the injection block 402 is completely entered into the corresponding injection groove 201. The rubber sheet is liquefied under high pressure and enters the multiple rubber-coating positions formed by the mold core 3 and the transfer mold 2 through the injection hole 202 to simultaneously coat multiple workpieces 1.

[0029] After the third step of the coating process is completed, push the corresponding mold core 3 support from one side of the mold to push out the coated mold core 3, and then push the mold core 3 with the workpiece 1 to be coated into the empty mold core installation position.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rubber-coated part transfer molding die, characterized in that, The rubber-coated part transfer molding mold includes: an upper mold, a transfer mold, a mold core, and a bottom mold. The upper mold is fixed on an upper mold base, the transfer mold is fixed on the bottom mold, and multiple mold core mounting positions are evenly arranged in parallel on the bottom mold. Each mold core mounting position contains a replaceable mold core. The mold core mounting position is a groove set on the bottom mold. The mold core includes a base plate and a guide plate. The width of the base plate matches the size of the groove. There are two guide plates, symmetrically fixed on both sides of the base plate, forming a workpiece placement groove together with the base plate. Multiple parallel workpiece positioning seats are evenly arranged in the workpiece placement groove. When the mold core is placed into the groove, the top of the guide plate is flush with the two side walls of the groove. The transfer mold is mounted on the bottom mold. Multiple guide protrusions, corresponding one-to-one with the mold core mounting position, are arranged parallel to each other on the bottom of the transfer mold. The dimensions of the guide protrusions match the dimensions of the workpiece placement slots of the corresponding mold cores in the mold core mounting positions. The guide protrusions are provided with workpiece upper brackets that correspond one-to-one with the positions of multiple workpiece positioning seats in the workpiece placement slots. The workpiece positioning seats and the corresponding workpiece upper brackets are assembled together to form a complete overmolding position. Each guide protrusion has an injection groove on the upper surface of the injection mold directly above it. The bottom of the injection groove has multiple injection holes that penetrate the bottom of the groove and the corresponding guide protrusions. The bottom of the upper mold is provided with injection pressure blocks that correspond one-to-one with the injection grooves.

2. The rubber-coated part transfer molding die according to claim 1, characterized in that, The mold core extends symmetrically outward at both ends, and both ends partially extend beyond the groove to form a support structure for the mold core.

3. The rubber-coated part transfer molding die according to claim 2, characterized in that, The mold core mounting position is symmetrically provided with mold core positioning protrusions at both ends, and the mold core is provided with positioning holes at both ends corresponding to the positions of the mold core positioning protrusions.

4. The rubber-coated part transfer molding die according to claim 3, characterized in that, The transfer mold has symmetrical lower guide holes on both sides, and the bottom mold has lower guide post mounting holes that correspond one-to-one with the lower guide holes. During assembly, a lower guide post is installed in each lower guide post mounting hole, and the transfer mold is movably mounted on the bottom mold by relying on multiple lower guide posts.

5. The rubber-coated part transfer molding die according to claim 2, characterized in that, The length of the support is 30~80mm.

6. The rubber-coated part transfer molding die according to claim 1, characterized in that, Strong magnetic positioning plates are installed at both ends of the workpiece positioning seat.

7. The rubber-coated part transfer molding die according to claim 1, characterized in that, The upper mold has symmetrical upper guide post mounting holes on both sides, and a guide post is installed in each upper guide post mounting hole. The injection mold has lower guide holes that correspond one-to-one with the upper guide post mounting holes.

8. The rubber-coated part transfer molding die according to claim 1, characterized in that, The glue injection holes are staggered with the clamping seats on the workpiece, and there is one glue injection hole on each side of the clamping seat on each workpiece.

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