Short-stroke injection mold for deep-cavity part

Abstract

The utility model relates to the technical field of injection molding, in particular to a short-stroke injection mold for a deep-cavity part, which comprises a forming component, a template component, a mold frame component, a guide component and an inclined ejection demolding mechanism, and the inclined ejection demolding mechanism comprises an inclined ejection rod and a straight ejection rod. A plurality of first guide holes inclined towards the outline center of a fixed mold are formed in a movable mold of the forming assembly, and the first guide holes are matched with the motion trail of the ejection end of the inclined ejector rod; a plurality of second guide holes are further formed in the movable mold, and the second guide holes are matched with the motion trail of the ejection end of the straight ejection rod; the straight ejector rod and the inclined ejector rod jointly act to eject injection-molded deep cavity parts, the ejection stroke is remarkably shortened through cooperation of the straight ejector rod and the inclined ejector rod, the long stroke requirement of a traditional inclined ejector mechanism is avoided, the overall height of a mold is reduced, and the mold is matched with a small injection molding machine.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a short-stroke injection mold for deep cavity parts. Background Technology

[0002] Most existing injection molds for deep cavity parts use ejector plates for demolding. Using ejector plates increases the overall size of the mold, which is not suitable for compact molds. It may not be feasible, especially in small-tonnage injection molding machines. In addition, the processing cost is high, and long-term use can easily lead to overflow or jamming due to wear.

[0003] Traditional inclined ejector structures require reserved space for movement, which may encroach on the layout space of other components within the mold, resulting in an increase in the overall size of the mold and the stroke of movement, making it difficult to adapt to small injection molding machines.

[0004] Therefore, there is an urgent need for a new type of short-stroke injection mold for deep cavity parts to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a short-stroke injection mold for deep cavity parts to solve the problem that existing molds are difficult to miniaturize.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides a short-stroke injection mold for deep-cavity parts, comprising a molding assembly, a template assembly, a mold base assembly, and a guide assembly. The molding assembly includes a fixed mold and a moving mold. The fixed mold has a cavity, and the moving mold has a protruding core. The shape of the injection cavity after the fixed mold and the moving mold are closed corresponds to the deep-cavity part. It also includes a slanted ejector mechanism, which includes a slanted ejector rod, a straight ejector rod, a fixing assembly, and a first guide mechanism.

[0009] The inclined ejector pin includes an ejector end and a fixed end arranged opposite to each other. The ejector end is used to eject towards the geometric center of the parting surface. The straight ejector pin includes an ejector end and a fixed end. The ejector end of the straight ejector pin is used to eject towards the parting surface to demold the product. The moving mold has several first guide holes inclined towards the contour center of the fixed mold. The first guide holes match the movement trajectory of the ejector end of the inclined ejector pin. The moving mold also has several second guide holes, which match the movement trajectory of the ejector end of the straight ejector pin.

[0010] The fixing assembly includes a first mechanism mounting plate, a second mechanism mounting plate, and an inclined push rod fixing block; the inclined push rod fixing block is provided with a sliding groove extending parallel to the parting surface, and the fixed end of the inclined push rod is slidably fixed in the sliding groove to allow the inclined push rod to slide relative to each other along the sliding groove;

[0011] The first mechanism mounting plate has a first through hole for matching the cross-section of the inclined rod fixing block and a second through hole for matching the fixed end of the straight rod, so as to fit the inclined rod fixing block and the straight rod.

[0012] The second mechanism mounting plate is fixed to the side of the first mechanism mounting plate away from the parting surface. The second mechanism mounting plate is provided with a fixing mechanism for fixing the inclined push rod fixing block and the straight push rod.

[0013] The first guiding mechanism includes two paired guide rods and bushings. The guide rods are connected to the mold frame assembly, and the bushings are connected to the first mechanism mounting plate and the second mechanism mounting plate. The bushings are slidably disposed outside the guide rods along the direction of the guide rods.

[0014] Preferably, a first plastic hot runner is provided in the fixed mold, and the first plastic hot runner is connected to the injection cavity to allow heated plastic fluid to flow into and form the deep cavity part;

[0015] The template assembly includes a movable template and a fixed template. The fixed template is embedded in the fixed template, and the movable template is embedded in the movable template. A second plastic hot runner is provided in the fixed template and is connected to the first plastic hot runner.

[0016] The mold frame assembly includes a fixed mold fixing plate and a moving mold fixing plate. The fixed mold fixing plate is connected to the fixed template of the injection molding machine, and the moving mold fixing plate is connected to the moving template of the injection molding machine. The fixed mold fixing plate is provided with a third plastic hot runner that communicates with the second plastic hot runner. The third plastic hot runner is connected to the injection nozzle of the injection molding machine. The moving mold fixing plate is also provided with through holes for the inclined ejector rod and the straight ejector rod to pass through.

[0017] The guiding assembly includes several second guiding mechanisms. Each second guiding mechanism includes a guide post and two guide sleeves sleeved on the guide post. The guide post is connected to the moving mold fixing plate, and the guide sleeves are connected to the fixed mold fixing plate. The guide post is slidably disposed within the guide sleeves along the direction of the guide sleeves.

[0018] Preferably, it also includes a cooling assembly, which includes cooling water channels formed in the moving mold fixing plate and the fixed mold fixing plate. The starting point of the cooling water channel is connected to a cooling water inlet pipe, and the ending point is connected to a cooling water outlet pipe.

[0019] Preferably, the guide assembly further includes a conical locator, which is disposed on the parting surface of the moving template and has a positioning hole on the fixed template that cooperates with the conical locator.

[0020] Preferably, the parting surface of the moving mold has several venting grooves.

[0021] Preferably, the assembly further includes a reset component, which includes several compression springs and spring guide rods arranged in pairs with the compression springs. One end of each compression spring abuts against the first mechanism mounting plate, and the other end abuts against the moving template. The compression springs are sleeved on the spring guide rods. The spring guide rods are disposed on the fixing component, and the first mechanism mounting plate and the second mechanism mounting plate have spring guide rod mounting holes.

[0022] Preferably, it also includes a limiting post, the first end face of which is connected to the moving mold fixing plate, while the second end face is not fixedly connected. When the mold is closed, the second end face of the limiting post abuts against the moving mold plate. The first mechanism mounting plate and the second mechanism mounting plate are also provided with holes for the limiting post to pass through.

[0023] Preferably, the mold frame assembly further includes a guide post fixing plate, which is disposed on the moving mold fixing plate, and the guide post fixing plate has several mounting holes that match the guide posts.

[0024] Preferably, the guide assembly includes four second guide mechanisms, which are centrally and symmetrically distributed around the fixed mold plate.

[0025] Preferably, it further includes a locking component, the locking component including bolts and locking blocks disposed on the moving template and the fixed template, the locking block being connected to the bolts.

[0026] (III) Beneficial Effects

[0027] In this invention, a short-stroke injection mold for deep-cavity parts utilizes a synergistic design of angled ejector pins and straight ejector pins. The angled ejector pins elevate at an angle towards the geometric center of the parting surface, providing both lateral and vertical ejection forces within a limited stroke, effectively releasing the clamping force of the deep-cavity parts. The straight ejector pins directly eject the product, assisting in overall demolding. This combination significantly shortens the ejection stroke, avoiding the long stroke requirements of traditional angled ejector mechanisms, reducing the overall mold height, and making it suitable for small injection molding machines. Attached Figure Description

[0028] Figure 1 This is a front view of a short-stroke injection mold for a deep-cavity part according to the present invention;

[0029] Figure 2 for Figure 1 A right view of a short-stroke injection mold for a deep-cavity part;

[0030] Figure 3 for Figure 1 Sectional view along the middle AA;

[0031] Figure 4 for Figure 2 A sectional view along the center CC;

[0032] Figure 5 for Figure 1 A partial cross-sectional view of a short-stroke injection mold for a deep-cavity part;

[0033] Figure 6 This is a sectional view of the fixed mold;

[0034] Figure 7 for Figure 1 A perspective view of a short-stroke injection mold for a deep-cavity part.

[0035] [Explanation of Labels in the Attached Image]

[0036] 1: Fixed template; 2: Moving template; 3: Moving template fixing plate; 4: Fixed template fixing plate;

[0037] 5: First mechanism mounting plate; 6: Second mechanism mounting plate; 7: Guide post; 8: Guide sleeve;

[0038] 9: Guide rod; 10: Bushing; 11: Spring guide rod; 12: Compression spring; 13: Straight push rod;

[0039] 14: Angled ejector pin; 15: Angled ejector pin fixing block; 16: First plastic hot runner;

[0040] 17: Second plastic hot runner; 18: Third plastic hot runner; 19: Water pipe connector;

[0041] 20: Cooling water flow channel; 21: Conical positioner; 22: Positioning hole; 23: Limiting post;

[0042] 24: Locking block; 25: Guide post fixing plate; 101: Moving mold; 102: Fixed mold;

[0043] 201: First guide hole; 202: Second guide hole. Detailed Implementation

[0044] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] See Figures 1 to 7 This utility model discloses a short-stroke injection mold for deep cavity parts, which includes a molding component, a template component, a mold frame component, and a guide component.

[0049] The molding assembly includes a fixed mold 102 and a moving mold 101. The fixed mold 102 has a cavity, and the moving mold 101 has a protruding core. The shape of the injection cavity after the fixed mold 102 and the moving mold 101 are closed corresponds to the shape of the deep cavity part.

[0050] The short-stroke injection mold for the deep-cavity part also includes a slanted ejector mechanism, which comprises a slanted ejector rod 14, a straight ejector rod 13, a fixing assembly, and a first guide mechanism; wherein...

[0051] The inclined ejector rod 14 includes an ejector end and a fixed end disposed opposite to each other. The ejector end is used to eject towards the geometric center of the parting surface. The straight ejector rod 13 includes an ejector end and a fixed end. The ejector end of the straight ejector rod 13 is used to eject towards the parting surface to demold the product. The moving mold 101 has several first guide holes 201 inclined towards the contour center of the fixed mold 102. The first guide holes 201 match the movement trajectory of the ejector end of the inclined ejector rod 14. The moving mold 101 also has several second guide holes 202, which match the movement trajectory of the ejector end of the straight ejector rod 13.

[0052] The fixing assembly includes a first mechanism mounting plate 5, a second mechanism mounting plate 6, and an inclined push rod fixing block 15; the inclined push rod fixing block 15 is provided with a sliding groove extending in a direction parallel to the parting surface, and the fixed end of the inclined push rod 14 is slidably fixed in the sliding groove so as to allow the inclined push rod 14 to slide relative to each other along the sliding groove;

[0053] The first mechanism mounting plate 5 has a first through hole for cooperating with the cross-section of the inclined rod fixing block 15 and a second through hole for cooperating with the fixed end of the straight rod 13, so as to fit the inclined rod fixing block 15 and the straight rod 13.

[0054] The second mechanism mounting plate 6 is fixed to the side of the first mechanism mounting plate 5 away from the parting surface. The second mechanism mounting plate 6 is provided with a fixing mechanism for fixing the inclined push rod fixing block 15 and the straight push rod 13.

[0055] The first guiding mechanism includes two paired guide rods 9 and a bushing 10. The guide rods 9 are connected to the mold frame assembly, and the bushing 10 is connected to the first mechanism mounting plate 5 and the second mechanism mounting plate 6. The bushing 10 is slidably disposed outside the guide rods 9 along the direction of the guide rods 9.

[0056] As the moving mold 101 moves backward with the moving template of the injection molding machine, the fixed mold 102 separates from the parting surface of the moving mold 101, and the injection-molded deep cavity part is attached to the core of the moving mold 101. The inclined ejector demolding mechanism is driven by the ejection system of the injection molding machine (not shown in the figure) and begins the ejection action. The inclined ejector rod 14 is ejected at an angle, with its ejector end sliding along the first guide hole 201 on the moving mold 101. The inclination angle of the first guide hole 201 determines the movement trajectory of the inclined ejector rod 14, causing it to generate lateral and vertical components of force during ejection. The inclined ejector rod fixing block 15 constrains the fixed end of the inclined ejector rod 14 through its groove, allowing the inclined ejector rod 14 to adjust its angle during sliding and avoiding motion interference. The ejector end of the straight ejector rod 13 moves along the second guide hole 202 on the moving mold 101, directly applying a vertical thrust to the bottom surface of the product. The vertical trajectory of the second guide hole 202 ensures that the straight ejector rod 13 only provides ejection force perpendicular to the parting surface, assisting in the overall demolding of the product. The guide rod 9 is fixed on the moving mold fixing plate 3 of the mold frame assembly, and the bushing 10 is connected to the first and second mechanism mounting plates 6. During ejection, the bushing 10 slides linearly along the guide rod 9, ensuring the stability of the movement direction of the entire inclined ejector demolding mechanism and avoiding skewing or jamming.

[0057] Preferably, a first plastic hot runner 16 is provided in the fixed mold 102, and the first plastic hot runner 16 is connected to the injection cavity to allow hot plastic fluid to flow into and form the deep cavity part.

[0058] The template assembly includes a movable template 2 and a fixed template 1. The fixed template 102 is embedded in the fixed template 1, and the movable template 101 is embedded in the movable template 2. The fixed template 1 has a second plastic hot runner 17 that communicates with the first plastic hot runner 16.

[0059] The mold frame assembly includes a fixed mold fixing plate 4 and a moving mold fixing plate 3. The fixed mold fixing plate 4 is connected to the fixed template 1 of the injection molding machine, and the moving mold fixing plate 3 is connected to the moving template of the injection molding machine. The fixed mold fixing plate 4 is provided with a third plastic hot runner 18 that communicates with the second plastic hot runner 17. The third plastic hot runner 18 is connected to the injection nozzle of the injection molding machine. The moving mold fixing plate 3 is also provided with a through hole for the inclined ejector rod 14 and the straight ejector rod 13 to pass through.

[0060] The guiding assembly includes several second guiding mechanisms. Each second guiding mechanism includes a guide post 7 and two guide sleeves 8 sleeved on the guide post 7. The guide post 7 is connected to the moving mold fixing plate 3, and the guide sleeves 8 are connected to the fixed mold fixing plate 4. The guide post 7 is slidably arranged within the guide sleeves 8 along the direction of the guide sleeves 8.

[0061] In this embodiment, plastic flows from the injection nozzle of the injection molding machine through the third plastic hot runner 18, the second plastic hot runner 17 and the first plastic hot runner 16 into the molding assembly, uniformly filling the cavity formed by the fixed mold 102 and the moving mold 101 to form a deep cavity part.

[0062] The guide post 7 is fixed on the moving mold fixing plate 3, and the guide sleeve 8 is fixed on the fixed mold fixing plate 4. When the mold is closed, the guide post 7 is inserted into the guide sleeve 8 and slides to ensure the precise alignment of the moving mold plate 2 and the fixed mold plate 1.

[0063] The moving template 2 is also provided with through holes (not labeled in the figure) for the straight push rod 13 and the inclined push rod 14 to pass through.

[0064] Preferably, it also includes a cooling assembly, which includes a cooling water channel 20 formed in the moving mold fixing plate 3 and the fixed mold fixing plate 4. The starting point of the cooling water channel 20 is connected to a cooling water inlet pipe, and the ending point is connected to a cooling water outlet pipe.

[0065] Cooling water channels 20 are provided inside both the moving mold fixing plate 3 and the fixed mold fixing plate 4. The channels are distributed according to the geometry of the cavity and core, close to the high-temperature area. The cooling water inlet pipe is connected to the external cooling system through the water pipe connector 19, and the cooling water outlet pipe discharges hot water through the water pipe connector 19, forming a closed loop circulation. After the high-temperature molten plastic is formed in the injection cavity, the cooling water is immediately pumped into the channels through the inlet pipe to absorb the heat of the mold. The metal material of the moving mold fixing plate 3 and the fixed mold fixing plate 4 quickly conducts heat to the cooling water, accelerating the curing of the plastic.

[0066] In a preferred embodiment, given the complex structure of the deep cavity, the flow channel is divided into multiple independent water paths, and the water flow rate in each area is adjusted by valves to achieve differentiated heat dissipation.

[0067] Preferably, the guide assembly further includes a conical locator 21, which is disposed on the parting surface of the moving template 2, and a positioning hole 22 that cooperates with the conical locator 21 is provided on the fixed template 1.

[0068] As the moving platen 2 moves closer to the fixed platen 1 along with the injection molding machine's moving platen, the conical locator 21 on the parting surface of the moving platen 2 first inserts into the locating hole 22 on the fixed platen 1. The conical surface design of the conical locator 21 guides the two platens to align, correcting minor offsets caused by processing or assembly errors.

[0069] Preferably, the parting surface of the moving mold 101 is provided with several venting grooves.

[0070] Several venting grooves, 0.02-0.05mm wide and 0.1-0.3mm deep, are cut on the parting surface of the moving mold 101 to serve as gas escape channels, guiding the gas to the outside of the mold. This avoids problems such as air marks, material shortages, burning, or internal bubbles on the surface of the molded product.

[0071] Preferably, the assembly further includes a reset component, which comprises several compression springs 12 and spring guide rods 11 arranged in pairs with the compression springs 12. One end of each compression spring 12 abuts against the first mechanism mounting plate 5, and the other end abuts against the moving template 2. The compression springs 12 are sleeved on the spring guide rods 11. The spring guide rods 11 are disposed on the fixing component, and the first mechanism mounting plate 5 and the second mechanism mounting plate 6 have mounting holes for the spring guide rods 11. During ejection, the mounting plate compresses the springs 12, and the springs store elastic potential energy to provide elastic force for subsequent reset.

[0072] Preferably, it also includes a limiting post 23, the first end face of which is connected to the moving mold fixing plate 3, while the second end face is not fixedly connected. When the mold is closed, the second end face of the limiting post 23 abuts against the moving mold plate 2. The first mechanism mounting plate 5 and the second mechanism mounting plate 6 are also provided with holes for the limiting post 23 to pass through.

[0073] During mold closing, the moving mold fixing plate 3 moves towards the fixed mold plate 1 along with the moving mold plate of the injection molding machine. When the moving mold plate 2 approaches the fixed mold plate 1, the second end face of the limiting post 23 abuts against the parting surface of the moving mold plate 2, forcibly preventing excessive mold closing. The rigid support of the limiting post 23 replaces the guide post 7 or the mold plate to bear the final mold closing pressure, avoiding deformation of the mold assembly due to overload. The limiting post 23 opened on the first mechanism mounting plate 5 and the second mechanism mounting plate 6 allows the limiting post 23 to pass through the ejection mechanism through holes, ensuring that there is no movement interference between the ejection assembly and the limiting post 23.

[0074] Preferably, the mold frame assembly further includes a guide post fixing plate 25, which is disposed on the moving mold fixing plate 3. The guide post fixing plate 25 has several mounting holes that match the guide posts 7. The guide post fixing plate 25, through precision machining of the mounting holes, ensures that the axis of the guide post 7 is perpendicular to the parting surface, eliminating the risk of mold misalignment. It is especially suitable for high-precision molding of deep cavities. The guide post fixing plate 25 evenly distributes the force on the guide post 7 to the moving mold fixing plate 3, avoiding stress concentration at the root of the guide post 7 that could lead to breakage or deformation.

[0075] Preferably, the guiding assembly includes four second guiding mechanisms, which are centrally symmetrically distributed around the fixed mold plate 4. When the moving mold plate 3 moves towards the fixed mold plate 1 with the moving mold plate of the injection molding machine, the guide posts 7 of the four second guiding mechanisms are simultaneously inserted into the guide sleeves 8 on the fixed mold plate 4. The centrally symmetrical layout (such as distribution at the four corners) ensures that the guide posts 7 are subjected to uniform force, avoiding bending or wear of the guide posts 7 on one side due to uneven load. The four guide posts 7 and the guide sleeves 8 constrain the movement trajectory of the moving and fixed mold plates 1 at four points, forcing the mold plate planes to close parallel, eliminating the risk of cavity misalignment caused by processing errors or assembly deviations.

[0076] Preferably, it also includes a locking component, which includes bolts disposed on the moving template 2 and the fixed template 1 and a locking block 24, the locking block 24 being connected to the bolts.

[0077] The locking block 24 is pre-installed on the moving template 2 and the fixed template 1 by bolts to lock and fasten the parting surface of the mold, reducing the risk of operator injury caused by the separation of the two molds during mold changing and handling.

[0078] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A short-stroke injection mold for a deep-cavity part, comprising a molding assembly, a template assembly, a mold base assembly, and a guide assembly; the molding assembly includes a fixed mold and a moving mold, the fixed mold having a cavity, the moving mold having a protruding core, and the shape of the injection cavity after the fixed mold and the moving mold are closed corresponding to the deep-cavity part; characterized in that, It also includes a slanted ejector demolding mechanism, which comprises a slanted ejector rod, a straight ejector rod, a fixing assembly, and a first guide mechanism; wherein, The inclined ejector pin includes an ejector end and a fixed end arranged opposite to each other. The ejector end is used to eject towards the geometric center of the parting surface. The straight ejector pin includes an ejector end and a fixed end. The ejector end of the straight ejector pin is used to eject towards the parting surface to demold the product. The moving mold has several first guide holes inclined towards the contour center of the fixed mold. The first guide holes match the movement trajectory of the ejector end of the inclined ejector pin. The moving mold also has several second guide holes, which match the movement trajectory of the ejector end of the straight ejector pin. The fixing assembly includes a first mechanism mounting plate, a second mechanism mounting plate, and an inclined push rod fixing block; the inclined push rod fixing block is provided with a sliding groove extending parallel to the parting surface, and the fixed end of the inclined push rod is slidably fixed in the sliding groove to allow the inclined push rod to slide relative to each other along the sliding groove; The first mechanism mounting plate has a first through hole for matching the cross-section of the inclined rod fixing block and a second through hole for matching the fixed end of the straight rod, so as to fit the inclined rod fixing block and the straight rod. The second mechanism mounting plate is fixed to the side of the first mechanism mounting plate away from the parting surface. The second mechanism mounting plate is provided with a fixing mechanism for fixing the inclined push rod fixing block and the straight push rod. The first guiding mechanism includes two paired guide rods and bushings. The guide rods are connected to the mold frame assembly, and the bushings are connected to the first mechanism mounting plate and the second mechanism mounting plate. The bushings are slidably disposed outside the guide rods along the direction of the guide rods.

2. The short-stroke injection mold as described in claim 1, characterized in that, The fixed mold has a first plastic hot runner channel, which is connected to the injection cavity to allow heated plastic fluid to flow into and form the deep cavity part. The template assembly includes a movable template and a fixed template. The fixed template is embedded in the fixed template, and the movable template is embedded in the movable template. A second plastic hot runner is provided in the fixed template and is connected to the first plastic hot runner. The mold frame assembly includes a fixed mold fixing plate and a moving mold fixing plate. The fixed mold fixing plate is connected to the fixed template of the injection molding machine, and the moving mold fixing plate is connected to the moving template of the injection molding machine. The fixed mold fixing plate is provided with a third plastic hot runner that communicates with the second plastic hot runner. The third plastic hot runner is connected to the injection nozzle of the injection molding machine. The moving mold fixing plate is also provided with through holes for the inclined ejector rod and the straight ejector rod to pass through. The guiding assembly includes several second guiding mechanisms. Each second guiding mechanism includes a guide post and two guide sleeves sleeved on the guide post. The guide post is connected to the moving mold fixing plate, and the guide sleeves are connected to the fixed mold fixing plate. The guide post is slidably disposed within the guide sleeves along the direction of the guide sleeves.

3. The short-stroke injection mold as described in claim 2, characterized in that, It also includes a cooling assembly, which includes cooling water channels formed in the moving mold fixing plate and the fixed mold fixing plate. The starting point of the cooling water channel is connected to a cooling water inlet pipe, and the ending point is connected to a cooling water outlet pipe.

4. The short-stroke injection mold as described in claim 2, characterized in that, The guide assembly also includes a conical locator, which is disposed on the parting surface of the moving template and has a positioning hole on the fixed template that cooperates with the conical locator.

5. The short-stroke injection mold as described in claim 1, characterized in that, Several venting grooves are provided on the parting surface of the moving mold.

6. The short-stroke injection mold as described in claim 2, characterized in that, It also includes a reset assembly, which includes several compression springs and spring guide rods arranged in pairs with the compression springs. One end of each compression spring abuts against the first mechanism mounting plate and the other end abuts against the moving template. The compression springs are sleeved on the spring guide rods. The spring guide rods are disposed on the fixing assembly, and the first mechanism mounting plate and the second mechanism mounting plate have spring guide rod mounting holes.

7. The short-stroke injection mold as described in claim 2, characterized in that, It also includes a limiting post, the first end face of which is connected to the moving mold fixing plate, while the second end face is not fixedly connected. When the mold is closed, the second end face of the limiting post abuts against the moving mold plate. The first mechanism mounting plate and the second mechanism mounting plate are also provided with holes for the limiting post to pass through.

8. The short-stroke injection mold as described in claim 2, characterized in that, The mold frame assembly also includes a guide post fixing plate, which is disposed on the moving mold fixing plate and has several mounting holes that match the guide posts.

9. The short-stroke injection mold as described in claim 2, characterized in that, The guiding assembly includes four second guiding mechanisms, which are centrally and symmetrically distributed around the fixed mold plate.

10. The short-stroke injection mold as described in claim 2, characterized in that, It also includes a locking component, which includes bolts and locking blocks disposed on the moving template and the fixed template, the locking block being connected to the bolts.

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