Sealing strip injection mold
By designing the matching between the annular core and the forming port and the setting of the overflow groove in the seal strip injection mold, the overflow and adhesion problems of liquid blasting are solved, and efficient molding and rapid cleaning of the seal strip are achieved, and manufacturing efficiency is improved.
Patent Information
- Application Number
- CN202420270474.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-03
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-02-03
AI Technical Summary
Existing seal strip injection molds are prone to liquid blasting and adhesion problems during the molding process, resulting in low manufacturing efficiency and requiring careful cleaning and trimming.
A sealing strip injection mold is designed, using an annular core to cooperate with the molding port, and a projection and overflow groove are set to seal the inner space of the cavity to prevent overflow of the blast material, and to ensure the position of the mold through the guide hole and guide groove. Stable, achieving one-time molding and rapid cleaning.
Effectively prevent liquid blasting, realize the single-use molding of complete seal strips, improve manufacturing efficiency, and reduce subsequent cleaning and edge trimming.
Smart Images
Figure CN222135763U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of injection molds and relates to a sealing strip injection mold. Background Art
[0002] Sealing strips are common seals in today's life. They have the advantages of low manufacturing cost and good sealing effect. Currently, common annular sealing strips are widely used in refrigerators, charging cabinets and other fields. In the prior art, the above-mentioned annular sealing strips are generally manufactured by injection molding. The molds used generally include a plate-shaped fixed mold and a movable mold. An annular receiving groove is provided on the top surface of the fixed mold, and a downwardly protruding and annular core is correspondingly provided on the bottom surface of the movable mold. When the movable mold is closed on the fixed mold, the core can be embedded in the receiving groove and cooperate with the groove wall of the receiving groove to form a cavity.
[0003] When using it, workers need to first move the movable mold away, inject a certain amount of liquid blank into the receiving groove of the fixed mold, and then drive the movable mold and the fixed mold to close the mold, so that the liquid blank is squeezed by the core in the mold cavity to form the required shape, and then form an annular sealing strip after the liquid blank is completely cooled.
[0004] However, in the actual molding process, the amount of liquid blank injected into the receiving tank by the workers is often excessive. That is to say, when the core is embedded in the receiving tank, part of the liquid blank will be squeezed by the core and overflow the cavity. At the same time, under the pressure of the movable mold, the liquid blank overflowing the cavity will enter the gap between the movable mold and the fixed mold. This will cause waste materials to adhere to the movable mold, the fixed mold and the molded sealing strip to varying degrees after the cooling work is completed. Before the next molding work, the workers are required to carefully clean the movable mold and the fixed mold, and also need to trim the molded sealing strip, which seriously slows down the manufacturing efficiency of the sealing strip. Summary of the invention
[0005] The purpose of the utility model is to solve the above problems in the prior art and to propose a sealing strip injection mold. The technical problem to be solved by the utility model is: how to improve the manufacturing efficiency of the sealing strip.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a sealing strip injection mold, including a movable mold plate and a fixed mold plate, the bottom surface of the movable mold plate has an annular core, the top surface of the fixed mold plate has a molding port, characterized in that the core extends into the molding port and makes the bottom surface of the movable mold plate fit with the top surface of the fixed mold plate, and an annular cavity is formed between the outer wall of the core and the inner wall of the molding port, the molding port has a protruding portion protruding upward, the circumferential inner wall of the core fits with the circumferential outer wall of the protruding portion, and the fixed mold plate is provided with an overflow groove arranged around the molding port.
[0007] Compared with the prior art, the sealing strip injection mold has the advantage that, in the process of the movable platen being molded on the movable platen, the core continuously extends into and squeezes the liquid blank injected into the molding port, so that the excess part of the blank is squeezed out of the molding port, and the remaining blank is confined in the mold cavity, and is formed into a sealing strip after being fully cooled. Under the above premise, in the process of mold closing, the circumferential outer wall of the protrusion located in the molding port and the circumferential inner wall of the core are matched in a fitting manner, thereby blocking the tiny space inside the mold cavity to prevent the extruded blank from flowing inwardly. At the same time, it is precisely because the tiny space inside the mold cavity is blocked that The extruded blank can only flow outward and flow into the overflow groove surrounding the molding port for centralized collection, so as to achieve the purpose of quickly cleaning the waste material adhering to the mold after the subsequent mold opening. In addition, the bottom surface of the movable mold plate and the top surface of the fixed mold plate are in a state of contact in the mold closing state, that is, it can ensure that the cavity and the overflow groove are blocked. The pressure exerted by the movable mold plate on the fixed mold plate during the mold closing process can ensure that the seal formed in the cavity and the waste material retained in the overflow groove can be directly cut off, thereby realizing one-time molding of a complete sealing strip without the need for detailed trimming, thereby achieving the advantage of improving the manufacturing efficiency of the sealing strip.
[0008] In the above-mentioned sealing strip injection mold, the circumferential outer wall of the protrusion is inclined inward from bottom to top in a conical shape, and the circumferential inner wall of the core is inclined outward from top to top in a conical shape. Through this arrangement, during the mold closing process, the position of the movable template can be corrected through the cooperation of the circumferential outer wall of the protrusion and the circumferential inner wall of the core, and at the same time, through the cooperation of the conical surfaces of the two, the contact surface between the protrusion and the core is ensured to be larger, thereby improving the sealing effect between the two and effectively preventing excess liquid blank from overflowing into the inner mold.
[0009] In the above-mentioned sealing strip injection mold, the protruding height of the protruding portion is less than the depth of the molding port, so that the worker can control the amount of liquid blank added to the molding port, and the body is shown as the amount of liquid blank poured in is flush with the height of the protruding portion, thereby avoiding excessive waste of liquid blank.
[0010] In the above sealing strip injection mold, there are several molding ports, several cores, and each core is opposite to each molding port, so that the mold can mold multiple sealing strips at one time, thereby improving the manufacturing efficiency.
[0011] In the above-mentioned sealing strip injection mold, the overflow groove is arranged around the plurality of molding ports, thereby ensuring that the volume of the overflow groove is large enough to fully accommodate the overflowed waste.
[0012] In the above-mentioned sealing strip injection mold, the movable platen is provided with guide holes at the circumferential corners, and the fixed platen is provided with guide grooves at the circumferential corners, and the positions of the guide holes correspond to the positions of the guide grooves. Subsequently, guide rod structures can be installed in each guide groove, and each guide rod is correspondingly inserted into each guide hole, so as to perform four-point positioning on the movable platen, ensuring that the position of the movable platen will not be offset during the mold opening and closing process.
[0013] Compared with the prior art, this sealing strip injection mold has the following advantages:
[0014] In the mold closing state, a sufficient amount of liquid blank is accommodated in the mold cavity, and the inner wall of the mold cavity is sealed by the cooperation of the circumferential outer wall of the protrusion and the circumferential inner wall of the core to prevent excess liquid blank from overflowing inwardly, and to limit the overflow direction of the liquid blank, so that the excess liquid blank eventually overflows and is concentrated in the overflow groove, and the pressure of the movable mold plate cuts off the formed sealing strip from the waste, thereby ensuring that the mold can be easily cleaned of waste in the future without the need for detailed trimming of the sealing strip, effectively improving the manufacturing efficiency of the sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the sealing strip injection mold.
[0016] Figure 2 It is a cross-sectional view of the sealing strip injection mold and a partial enlarged view thereof.
[0017] Figure 3 It is a structural diagram of the dynamic template.
[0018] Figure 4 It is a structural diagram of a fixed template.
[0019] In the figure, 1, movable template; 11, core; 12, guide hole; 2, fixed template; 21, molding port; 211, protrusion; 22, overflow groove; 23, guide groove; 3, cavity. DETAILED DESCRIPTION
[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0021] like Figure 1-4As shown, the sealing strip injection mold includes a fixed mold plate 2 and a movable mold plate 1 in the shape of a square plate. Four rectangular molding ports 21 are opened on the top surface of the fixed mold plate 2. A rectangular protrusion 211 is integrally formed in each molding port 21, and the circumferential outer side wall of each protrusion 211 is inclined inward from bottom to top to form a conical surface. Four cores 11 are arranged in a circular shape and protrude downward on the bottom surface of the movable mold plate 1. The position of each core 11 corresponds to the position of each molding port 21 one by one, and the circumferential inner side wall of each core 11 is gradually inclined outward from top to bottom to form a conical surface, as shown in FIG. Figure 2 As shown, when the movable template is closed on the fixed template so that the bottom surface of the movable template fits with the top surface of the fixed template, each core 11 can be embedded in the molding port 21, and while the circumferential outer wall of the protrusion 211 fits with the formed circumferential inner wall, the circumferential outer wall of the core 11 cooperates with the bottom surface of the movable template 1, the bottom wall of the molding port 21 and the circumferential inner wall of the molding port 21 to form an annular and circumferentially closed cavity.
[0022] In addition, if Figure 3 and Figure 4 As shown, a square ring-shaped overflow groove 22 is opened on the top surface of the fixed template 2 around each forming port 21, and each corner of the overflow groove 22 is in an arc-shaped transition, a guide groove 23 is opened at the circumferential corners of the fixed template 2, and a guide hole 12 is opened at the circumferential corners of the movable template 1, and the position of each guide hole 12 corresponds to the position of each guide groove 23 one by one. When assembling the mold subsequently, the guide rod can be assembled in each guide groove 23 accordingly, and the movable template 1 can cooperate with each guide rod through each guide hole 12, so as to avoid position displacement of the movable template 1 when opening and closing the mold.
[0023] Working principle: In the mold open state, the worker adds liquid blanks into each molding port 21, and the specific amount of addition is roughly flush with the height of the protrusion 211, and then controls the movable template 1 to move down to close the mold, so that the cavity formed by the cooperation of the two is filled with liquid blanks, and the excess liquid blanks are squeezed out by the core 11 under the pressure of the movable template 1 and concentrated in the overflow groove 22, so that a sealing strip is formed in the cavity, and the waste formed in the overflow groove 22 can be quickly collected and cleaned. At the same time, during the mold closing process, the pressure applied by the movable template 1 can block the sealing strip and the waste, so there is no need to perform detailed waste trimming work on the sealing strip after demolding.
[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
[0025] Although the terms such as movable plate 1, core 11, guide hole 12, fixed plate 2, molding port 21, protrusion 211, overflow groove 22, guide groove 23, and cavity 3 are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
Claims
1. A sealing strip injection mold, comprising a movable mold plate (1) and a fixed mold plate (2), wherein the bottom surface of the movable mold plate (1) has an annular core (11), and the top surface of the fixed mold plate (2) has a molding opening (21), characterized in that: The core (11) extends into the molding port (21) and makes the bottom surface of the movable mold plate (1) fit with the top surface of the fixed mold plate (2), and an annular mold cavity (3) is formed between the outer wall of the core (11) and the inner wall of the molding port (21), the molding port (21) has a protruding portion (211) protruding upward, the circumferential inner wall of the core (11) fits with the circumferential outer wall of the protruding portion (211), and the fixed mold plate (2) is provided with an overflow groove (22) arranged around the molding port (21).
2. The sealing strip injection mold according to claim 1, characterized in that: The circumferential outer side wall of the protruding portion (211) is inclined inwardly from bottom to top in a conical shape, and the circumferential inner side wall of the core (11) is inclined outwardly from top to top in a conical shape.
3. The sealing strip injection mold according to claim 1 or 2, characterized in that: The protruding height of the protruding portion (211) is smaller than the depth of the molding opening (21).
4. The sealing strip injection mold according to claim 3, characterized in that: There are a plurality of the molding ports (21) and the mold cores (11), and the positions of the mold cores (11) and the molding ports (21) are opposite to each other.
5. The sealing strip injection mold according to claim 4, characterized in that: The overflow groove (22) is arranged around a plurality of the forming openings (21).
6. The sealing strip injection mold according to claim 5, characterized in that: The movable template (1) is provided with guide holes (12) at the circumferential corners, and the fixed template (2) is provided with guide grooves (23) at the circumferential corners, and the positions of the guide holes (12) correspond to the positions of the guide grooves (23) one by one.