Bottle preform preforming mold

Abstract

A bottle preform preforming mold comprises a mold body and an air blowing device which are installed on bottle blowing equipment, and the air blowing device is located above the mold body and moves in the height direction of the bottle blowing equipment. The mold body comprises a bottom plate, a fixed mold plate, a movable mold plate and a mold opening and closing mechanism, wherein the bottom plate is used for fixedly installing the mold body on bottle blowing equipment; the fixed mold plate and the movable mold plate are arranged on the bottom plate, are attached to each other and jointly form a pre-forming cavity; the mold opening and closing mechanism is arranged on the movable mold plate and is used for enabling the movable mold plate to move in the direction close to or away from the fixed mold plate; the blowing device comprises a first fixing plate, a second fixing plate and a blowing assembly, wherein the first fixing plate is used for fixedly installing the blowing device on the bottle blowing equipment, the second fixing plate is arranged on the bottom face of the first fixing plate, and the blowing assembly is embedded in the second fixing plate. The utility model provides a preform preforming die which performs preforming processing on a preform before the preform is made into a plastic bottle, so that the production qualification rate of the plastic bottle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bottle blowing moulds, in particular to a bottle blank preforming mould. Background Art

[0002] The plastic bottles in the prior art are all processed by a blow molding machine on plastic particles. The tubular plastic bottle blanks are obtained by extruding thermoplastic resin or injection molding. The bottle blanks are heated to a softened state and placed in a mold body. After the mold is closed, compressed air is immediately introduced into the bottle blank to inflate the bottle blank and cling to the inner wall of the mold. After the bottle blank is formed and cooled, it is demolded to obtain the desired plastic hollow product. Plastic bottles generally use polypropylene as the production raw material. The problem is that the toughness of polypropylene is poor. The bottle blanks are prone to breakage, deformation or uneven thickness during a blow molding process, resulting in a poor production qualification rate of plastic bottles. In addition, the blow molding mold can only blow air to one bottle blank at a time, resulting in low production efficiency of plastic bottles, affecting the production benefits of the enterprise.

[0003] Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of the utility model is to overcome at least one of the deficiencies of the prior art and to provide a preform mold for a bottle blank, which performs preforming processing on the bottle blank before the bottle blank is made into a plastic bottle, thereby improving the production qualification rate of the plastic bottle.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the embodiment of the utility model is:

[0006] A preform mold for a bottle blank comprises a mold body and a blowing device mounted on a bottle blowing device, wherein the blowing device is located above the mold body and moves along the height direction of the bottle blowing device, wherein the mold body comprises a bottom plate for fixing the mold body on the bottle blowing device, a fixed mold plate and a movable mold plate which are arranged on the bottom plate and fit each other and jointly form a preforming cavity, and an opening and closing mold mechanism which is arranged on the movable mold plate and is used to move the movable mold plate in a direction close to or away from the fixed mold plate, wherein the blowing device comprises a first fixing plate for fixing the blowing device on the bottle blowing device, a fixed mold plate and a movable mold plate which are arranged on the bottom plate and fit each other and jointly form a preforming cavity, and a mold opening and closing mechanism which is arranged on the movable mold plate and is used to move the movable mold plate in a direction close to or away from the fixed mold plate, wherein the blowing device comprises a first fixing plate for fixing the blowing device on the bottle blowing device, a fixed mold plate and a movable mold plate which are arranged on the bottom plate and are used to move the movable mold plate in a direction close to or away from the fixed mold plate, and a fixed mold plate and a movable mold plate which are arranged on the movable mold plate. A second fixed plate is disposed on the bottom surface of the first fixed plate, and a blowing assembly is embedded in the second fixed plate, the blowing assembly includes a first blowing component and a second blowing component, the first blowing component is provided with a receiving cavity for embedding the second blowing component, the receiving cavity is extended along the length direction of the first blowing component, and its diameter is larger than the diameter of the outer peripheral wall of the second blowing component, the fixed template and the movable template are fitted with each other, the bottle blank is placed in the preforming cavity from top to bottom, the blowing assembly extends into the preforming cavity from top to bottom and blows air toward the bottle blank to expand the bottle blank to fit with the preforming cavity wall.

[0007] A second mounting hole is provided on the second fixing plate, and a diameter of the second mounting hole is equivalent to a diameter of an upper portion of an outer peripheral wall of the first blowing component. A first mounting structure is provided between the first blowing component and the second mounting hole, and the first mounting structure includes a first mounting step provided in the second mounting hole, and a first mounting protrusion provided on the first blowing component. The first mounting step is arranged on the lower portion of a side wall of the second mounting hole, and the first mounting protrusion is arranged on the upper portion of an outer peripheral wall of the first blowing component. The first blowing component is inserted into the second mounting hole from top to bottom, and the first mounting protrusion abuts against the first mounting step to enable the first blowing component to be embedded in the second mounting hole.

[0008] A second mounting structure is provided between the second blowing component and the accommodating cavity, the second mounting structure comprising a second mounting step provided in the accommodating cavity, and a second mounting protrusion provided on the second blowing component, the second mounting step is arranged around the top end of the accommodating cavity, the second mounting protrusion is arranged around the upper portion of the outer peripheral wall of the second blowing component, the second blowing component is inserted into the accommodating cavity from top to bottom, and the second mounting protrusion abuts against the second mounting step so that the second blowing component is embedded in the first blowing component.

[0009] The first fixed plate is provided with a first air path connected to the output end of an external air source, the second fixed plate is provided with a second air path connected to the input end of the external air source, the second blowing component is provided with an air inlet path connected to the first air path and the bottle blank in the preforming cavity respectively, the second blowing component extends into the accommodating cavity and forms an air outlet path connected to the bottle blank in the preforming cavity and the second air path respectively between the second blowing component and the accommodating cavity.

[0010] The mold body also includes a fixed mold pad arranged on the outside of the fixed mold plate, a movable mold pad arranged on the outside of the movable mold plate, the opening and closing mold mechanism is arranged on the movable mold pad, the opening and closing mold mechanism includes a driving component fixedly mounted on the movable mold pad, a mechanism bracket fixedly mounted on the movable end of the driving component, and a plurality of guide structures arranged between the mechanism bracket and the movable mold pad, the guide structure includes a guide hole arranged on the movable mold pad, and a guide rod arranged on the mechanism bracket and corresponding to the guide hole, the guide rod is extended along the movement direction of the movable mold plate, the depth of the guide hole is greater than the diameter size of the bottle blank after preforming, the movable end of the driving component moves toward its fixed end, and the end of the guide rod moves toward the bottom end of the guide hole, so that the movable mold plate moves in the direction away from the fixed mold plate, the movable end of the driving component moves in the direction of the mechanism bracket, and the end of the guide rod moves toward the top end of the guide hole, so that the movable mold plate moves in the direction close to the fixed mold plate.

[0011] The first blowing component is provided with a positioning portion for positioning the bottle mouth of the bottle blank. The positioning portion is arranged at the bottom end of the first blowing component and extends downward. The central axis of the positioning portion coincides with the central axis of the accommodating cavity. The diameter of the outer peripheral wall of the positioning portion is slightly smaller than the diameter of the inner cavity of the bottle mouth of the bottle blank so that the positioning portion extends into the bottle mouth of the bottle blank from top to bottom.

[0012] The top of the preforming cavity is provided with a feeding opening for the mouth of the bottle blank to extend out of the preforming cavity. The diameter of the feeding opening is larger than the outer peripheral wall size of the bottle body of the bottle blank so that the bottle blank can be inserted into the preforming cavity from top to bottom through the feeding opening. A positioning structure is provided between the feeding opening and the first blowing component. The positioning structure includes a positioning countersunk hole arranged on the periphery of the feeding opening and a positioning component arranged at the bottom end of the first blowing component. The shape of the lower part of the outer peripheral wall of the positioning component matches the shape of the positioning countersunk hole. The blowing device moves downward and approaches the mold body, and the lower part of the positioning component extends into the positioning countersunk hole, so that the second blowing component is aligned with the feeding opening and extends into the preforming cavity.

[0013] The positioning component is provided with a positioning through hole for positioning the bottle mouth of the bottle blank. The positioning through hole is arranged at the bottom end of the positioning component. The diameter of the positioning through hole is slightly larger than the outer peripheral wall size of the bottle mouth of the bottle blank so that the bottle mouth of the bottle blank extends into the positioning through hole from bottom to top.

[0014] A limiting structure is also provided between the blowing device and the mold body, and the limiting structure includes a limiting plate arranged on the blowing device and a limiting component arranged on the mold body. The limiting plate is fixedly mounted on the lower part of the first blowing component, and the limiting components are divided into several groups and fixedly mounted on the top surface of the mold body. When the blowing device moves downward and approaches the mold body, the bottom surface of the limiting plate abuts against the limiting component to limit the blowing device from continuing to move downward.

[0015] The mold body is provided with a plurality of groups of pre-forming cavities, and the plurality of groups of pre-forming cavities are arranged at intervals along the length direction of the mold body. The blowing device is provided with a plurality of groups of blowing components corresponding to the number of the pre-forming cavities, and the plurality of blowing components are arranged at intervals along the length direction of the second fixed plate.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model adopts the bottle blank preforming mold of the above technical solution, so that the bottle blank is preformed before being made into a plastic bottle. The preform is blow-molded multiple times, and the bottle blank is avoided from being damaged, deformed or having uneven thickness during the molding process, thereby improving the production qualification rate of plastic bottles.

[0018] In addition, the bottle blank preforming mold of the present technical solution has multiple preforming cavities on its mold body, and multiple blowing components on its blowing device, which can blow multiple groups of bottle blanks at one time, thereby improving the production efficiency of plastic bottles and the production benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a bottle blank before preforming according to an embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of a preform after preforming in one embodiment of the utility model.

[0021] Figure 3 The figure is a schematic structural diagram of a preform mold for a bottle blank according to an embodiment of the utility model.

[0022] Figure 4 The figure is a top view of a preform mold for a bottle blank according to an embodiment of the utility model.

[0023] Figure 5 for Figure 4 BB cross-sectional view.

[0024] Figure 6 for Figure 5 Enlarged view of part C.

[0025] Figure 7 for Figure 5 Enlarged view of part D.

[0026] Figure 8 for Figure 4 AA section view.

[0027] Fig. 9 This is a cross-sectional view of a preform mold for a bottle blank in a first working state according to an embodiment of the utility model.

[0028] Fig.10 It is a cross-sectional view of the second working state of the preform mold for a bottle blank according to an embodiment of the utility model.

[0029] Fig.11 It is a cross-sectional view of the third working state of the preform mold for a bottle blank according to an embodiment of the utility model.

[0030] Fig.12 It is a cross-sectional view of the fourth working state of the preform mold for a bottle blank according to an embodiment of the utility model.

[0031] Fig.13 It is a cross-sectional view of the fifth working state of the preform mold for a bottle blank according to an embodiment of the utility model.

[0032] Fig.14 It is a cross-sectional view of the sixth working state of the preform mold for a bottle blank according to an embodiment of the utility model. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0034] See also Figure 3-8The preform mold for bottle blanks comprises a mold body and a blowing device installed on a bottle blowing device. The mold body is installed on a rotating workbench of the bottle blowing device. The blowing device is installed on the blowing end of the bottle blowing device. The blowing device is located above the mold body and moves along the height direction of the bottle blowing device. The mold body comprises a bottom plate 101 for fixing the mold body on the bottle blowing device, a fixed mold plate 103, a movable mold plate 104, a mold opening and closing mechanism, a fixed mold pad 114, a movable mold pad 105, a left pad 106, a right pad 107, and a supporting foot 108. The fixed mold plate 103 is fixedly installed on the bottom plate 101, and the movable mold plate 104 is movably installed on the bottom plate 101. The fixed mold plate 103 and the movable mold plate 104 are attached to each other and jointly form a preforming cavity 1 02, the bottom plate 101, the fixed mold plate 103 and the movable mold plate 104 are provided with heat dissipation channels to cool the preform 3 after preforming, the fixed mold pad 114 is fixedly mounted on the outer side of the fixed mold plate 103, that is, located on the end surface of the fixed mold plate 103 away from the preforming cavity 102, the movable mold pad 105 is fixedly mounted on the outer side of the movable mold plate 104, that is, located on the end surface of the movable mold plate 104 away from the preforming cavity 102, the fixed mold pad 114 and the movable mold pad 105 are provided with heating channels for heating the preform 3 in the preforming cavity 102, the left pad 106 is arranged on the left side of the fixed mold plate 103 and the movable mold plate 104, the right pad 107 is arranged on the right side of the fixed mold plate 103 and the movable mold plate 104, and the mold opening and closing mechanism is arranged on the movable mold pad 105 and It is used to make the movable template 104 move in the direction close to or away from the fixed template 103. The number of supporting feet 108 is preferably two groups and they are arranged at intervals along the length direction of the mold body to fix the mold body on the rotating workbench of the bottle blowing equipment. The blowing device includes a first fixed plate 201, a second fixed plate 202, and a blowing assembly. The first fixed plate 201 is located at the top of the blowing device so that the blowing device is fixed on the bottle blowing equipment. The first fixed plate 201 is provided with a positioning recessed hole and a fixing screw hole corresponding to the blowing end of the bottle blowing equipment. The first fixed plate 201 is provided with a first air path 2011 connected to the output end of the external air source. The second fixed plate 202 is fixedly mounted on the bottom surface of the first fixed plate 201 by a fastener. A second air path 2023 connected to an input end of an external air source is provided on 202, and an air blowing assembly is embedded on the second fixed plate 202, which includes a first air blowing component 203 and a second air blowing component 204. The first air blowing component 203 is sleeved on the periphery of the second air blowing component 204, and the second air blowing component 204 is provided with an air inlet passage 2042 respectively connected to the first air path 2011 and the bottle blank 3 in the preforming cavity 102. Specifically, a receiving cavity for embedding the second air blowing component 204 is provided in the first air blowing component 203, and the receiving cavity extends along the length direction of the first air blowing component 203 and passes through the upper and lower end surfaces of the first air blowing component 203. The diameter of the receiving cavity is greater than the diameter of the outer peripheral wall of the second air blowing component 204.The second blowing component 204 extends into the accommodating cavity and forms an outlet passage 2034 which is connected with the preform 3 in the preforming cavity 102 and the second air passage 2023 respectively. The air enters the mold body through the first air passage 2011 and the air inlet passage 2042 in sequence, and then leaves the mold body through the outlet passage 2034 and the second air passage 2023 in sequence. When the fixed template 103 and the movable template 104 are attached to each other, the preform 3 is placed in the preforming cavity 102 from top to bottom, and the blowing device moves downward, so that the blowing component extends into the preforming cavity 102 from top to bottom and blows air toward the preform 3 so that the preform 3 is expanded to fit the wall of the preforming cavity 102, so as to complete the preforming process of the preform 3.

[0035] By using the preform preforming mold of the above technical solution, a preform 3 preforming process is added before the preform 3 is made into a plastic bottle, so that the preform 3 can be blow-molded multiple times, thereby avoiding the problems of breakage, deformation or uneven thickness of the preform 3 during the molding process, thereby improving the production qualification rate of plastic bottles and improving the production efficiency of the enterprise.

[0036] Furthermore, a second mounting hole 2021 is provided on the second fixing plate 202, and the second mounting hole 2021 is extended along the height direction of the second fixing plate 202 and penetrates the second fixing plate 202 up and down. The diameter size of the second mounting hole 2021 is equivalent to the diameter size of the upper part of the outer peripheral wall of the first blowing component 203, so that the first blowing component 203 can pass along the length direction of the second mounting hole 2021. A first mounting structure is provided between the first blowing component 203 and the second mounting hole 2021. In this embodiment, the first mounting structure includes a first mounting step 2022 arranged in the second mounting hole 2021, and a first mounting protrusion 2032 arranged on the first blowing component 203. The first mounting protrusion 2032 is arranged corresponding to the first mounting step 2022. The first mounting step 2022 is arranged on the lower part of the side wall of the second mounting hole 2021. The radial dimension of the first mounting step 2022 is smaller than that of the second mounting The radial dimension of the hole 2021, the first mounting protrusion 2032 is annularly arranged on the upper part of the outer peripheral wall of the first blowing component 203, and the diameter dimension of the first mounting protrusion 2032 is larger than the outer peripheral wall dimension of the first blowing component. When the first blowing component 203 is inserted into the second mounting hole 2021 from top to bottom, the first mounting protrusion 2032 abuts against the first mounting step 2022 so that the first blowing component 203 is embedded in the second mounting hole 2021. When the second fixing plate 202 is installed on the first fixing plate 201, the bottom surface of the first fixing plate 201 abuts against the top surface of the first blowing component 203 to realize that the first blowing component 203 is fixedly installed in the second mounting hole 2021. A sealing component is provided between the first blowing component 203 and the second fixing plate 202. The sealing component is preferably a sealing ring, so that the first blowing component 203 and the second fixing plate 202 are sealed and connected to avoid air leakage. Those skilled in the art can understand it.

[0037] Further, a second mounting structure is provided between the second blowing component 204 and the accommodating cavity. In this embodiment, the second mounting structure includes a second mounting step 2033 provided in the accommodating cavity, and a second mounting protrusion 2041 provided on the second blowing component 204. The second mounting protrusion is provided corresponding to the second mounting step 2033. The second mounting step 2033 is arranged around the top of the accommodating cavity. The radial dimension of the second mounting step 2033 is smaller than the radial dimension of the accommodating cavity. The second mounting protrusion 2041 is arranged around the upper part of the outer peripheral wall of the second blowing component 204. The diameter of the mounting protrusion 2041 is larger than the outer wall size of the second blowing component 204. When the second blowing component 204 is inserted into the accommodating cavity from top to bottom, the second mounting protrusion 2041 abuts against the second mounting step 2033 so that the second blowing component 204 is embedded in the first blowing component 203. When the second fixing plate 202 is installed on the first fixing plate 201, the bottom surface of the first fixing plate 201 abuts against the top surface of the second blowing component 204 to realize the fixed installation of the second blowing component 204 in the accommodating cavity, which can be understood by those skilled in the art.

[0038] Furthermore, the mold opening and closing mechanism includes a driving component 109 fixedly mounted on the movable mold backing plate 105, a mechanism bracket 110 fixedly mounted on the movable end of the driving component 109, and a plurality of guide structures arranged between the mechanism bracket 110 and the movable mold backing plate 105. Specifically, in the present embodiment, the driving component 109 is preferably a cylinder or a hydraulic cylinder, and its fixed end is mounted on the movable mold plate 104. The guide structure is preferably four groups, and the guide structure includes a guide hole 1051 arranged on the movable mold backing plate 105, and a guide rod 1101 arranged on the mechanism bracket 110 and corresponding to the guide hole 1051. The guide rod 1101 is extended along the movement direction of the movable mold plate 104 and is located at the four corners of the mechanism bracket 110. The depth of the guide hole 1051 is greater than the diameter of the preform 3 after preforming, so that the guide rod 11 01 moves to the bottom end of the guide hole 1051, the preformed bottle blank 3 can be taken out from the preform cavity 102, and the driving component 109 is started. When the movable end of the driving component 109 moves toward its fixed end, the end of the guide rod 1101 moves toward the bottom end of the guide hole 1051, so that the movable template 104 moves away from the fixed template 103, and the movable template 104 and the fixed template 103 are separated from each other to take out the processed bottle blank 3. When the movable end of the driving component 109 moves toward the direction of the mechanism bracket 110, the end of the guide rod 1101 moves toward the top end of the guide hole 1051, so that the movable template 104 moves toward the direction close to the fixed template 103, and the movable template 104 and the fixed template 103 are fitted together to perform preform processing on the bottle blank 3, which can be understood by those skilled in the art.

[0039] Furthermore, a positioning portion 2035 for positioning the bottle mouth of the bottle blank 3 is provided on the first blowing component 203. The positioning portion 2035 is arranged at the bottom end of the first blowing component 203 and extends downward. The central axis of the positioning portion 2035 coincides with the central axis of the accommodating cavity. The diameter of the outer peripheral wall of the positioning portion 2035 is slightly smaller than the diameter of the inner cavity of the bottle mouth of the bottle blank 3 so that the positioning portion 2035 extends from top to bottom into the inner cavity of the bottle mouth of the bottle blank 3. Specifically, the positioning portion 2035 and the first blowing component 203 are integrally formed. A through hole is opened in the center of the positioning portion 2035 so that the second blowing component 204 can pass through the through hole to pass out of the first blowing component 203. Through the above technical solution, when the blowing assembly is extended into the mold body, the positioning portion 2035 can position and fix the bottle blank 3 in the preforming cavity 102 through the bottle mouth of the bottle blank 3, which can be understood by those skilled in the art.

[0040] Furthermore, a feeding opening 111 is provided at the top of the preforming cavity 102 for the mouth of the bottle blank 3 to extend out of the preforming cavity 102. The diameter of the feeding opening 111 is larger than the outer peripheral wall of the bottle body of the bottle blank 3 so that the bottle blank 3 can be inserted into the preforming cavity 102 from top to bottom through the feeding opening 111. Specifically, the bottle blank 3 can be placed in the preforming cavity 102 without opening the fixed template 103 and the movable template 104, which can improve the processing efficiency of the bottle blank 3 to a certain extent. There is a positioning structure. In this embodiment, the positioning structure includes a positioning countersunk hole 112 arranged on the periphery of the feed opening 111, and a positioning component 205 arranged at the bottom end of the first blowing component 203. The horizontal projection of the positioning countersunk hole 112 is trapezoidal, and its size gradually increases from top to bottom. The positioning component 205 can be detachably installed on the outer peripheral wall of the first blowing component 203. Specifically, a third mounting structure is provided between the positioning component 205 and the first blowing component 203 to achieve mutual fixed connection. The third mounting structure includes a positioning countersunk hole 112 arranged on the first blowing component 203. The third mounting portion at the lower part of the outer peripheral wall of the blowing component 203 and the third mounting hole arranged on the positioning component 205, the third mounting portion and the third mounting hole are arranged correspondingly, the horizontal projection shape of the third mounting portion and the third mounting hole is trapezoidal, and its size gradually decreases from top to bottom, the positioning component 205 is sleeved on the outer peripheral wall of the first blowing component 203 from bottom to top, the third mounting hole and the third mounting portion are interference fit to realize the positioning component 205 fixedly mounted on the first blowing component 203, and the top of the third mounting portion is provided with a step so that the first blowing Component 203 can be mounted on the top surface of the positioning component 205. The shape of the lower portion of the outer peripheral wall of the positioning component 205 matches the shape of the positioning countersunk hole 112. When the blowing device moves downward and approaches the mold body, the lower portion of the positioning component 205 extends into the positioning countersunk hole 112, so that the second blowing component 204 is aligned with the feed opening 111 and extends downward into the preforming cavity 102. Through the above technical solution, the blowing device can be aligned with the mold body to avoid collision and damage to the second blowing component 204, which can be understood by those skilled in the art.

[0041] Furthermore, the positioning component 205 is provided with a positioning through hole 2051 for positioning the bottle mouth of the bottle blank 3. The positioning through hole 2051 is arranged at the bottom end of the positioning component 205. The diameter of the positioning through hole 2051 is slightly larger than the outer peripheral wall size of the bottle mouth of the bottle blank 3 so that the bottle mouth of the bottle blank 3 can extend from bottom to top into the positioning through hole 2051. Through the above technical solution, when the blowing assembly is extended into the mold body, the positioning through hole 2051 can further position and fix the bottle blank 3 in the preforming cavity 102 through the bottle mouth of the bottle blank 3, which can be understood by those skilled in the art.

[0042] Furthermore, a limiting structure is provided between the blowing device and the mold body. In this embodiment, the limiting structure includes a limiting plate 206 provided on the blowing device and a limiting component 113 provided on the mold body. The limiting plate 206 is fixedly mounted on the lower portion of the first blowing component 203. Specifically, the limiting plate 206 is detachably mounted on the positioning component 205. A limiting through hole is provided on the limiting plate 206. A fourth mounting structure is provided between the limiting plate 206 and the positioning component 205. The fourth mounting structure includes a fourth mounting step provided in the limiting through hole and a fourth mounting protrusion provided on the positioning component 205. The fourth mounting step is provided at the upper portion of the limiting through hole. The fourth mounting protrusion is provided at the upper portion of the outer peripheral wall of the positioning component 205. A fastening hole is provided on the step, and a mounting through hole is provided on the fourth mounting protrusion. When the limit plate 206 is mounted on the outer peripheral wall of the positioning component 205 from bottom to top, the fourth mounting protrusion abuts against the fourth mounting step, and the fastening component passes through the mounting through hole and is screwed with the fastening hole to realize that the limit plate 206 is fixed to the blowing device. The limit components 113 are preferably four groups and are fixed on the top surface of the mold body in pairs, that is, they are fixed on the top surfaces of the left pad 106 and the right pad 107. When the blowing device moves downward and approaches the mold body, the bottom surface of the limit plate 206 abuts against the limit component 113, so that the blowing device cannot continue to move downward, thereby avoiding continued downward movement to damage the positioning component 205 and the blowing assembly, which can be understood by those skilled in the art.

[0043] Further, the mold body is provided with a plurality of groups of pre-forming cavities 102. Specifically, in this embodiment, the fixed template 103 and the movable template 104 are attached to each other and together form three groups of pre-forming cavities 102 and are arranged at intervals along the length direction of the mold body. The blowing device is provided with a plurality of groups of blowing components corresponding to the number of the pre-forming cavities 102. Specifically, the number of the blowing components is preferably three groups corresponding to the pre-forming cavities 102 and are arranged at intervals along the length direction of the second fixed plate 202. The second fixed plate 202 is provided with three groups of second fixing holes so that the three groups of blowing components can be The components can be embedded in the second fixed plate 202. When the second fixed plate 202 is installed on the bottom surface of the first fixed plate 201, the bottom surface of the first fixed plate 201 abuts against the top surface of the blowing component, so that the three groups of blowing components are fixedly installed in the second mounting hole 2021. Through the above technical scheme, the mold body has multiple preforming cavities 102 at the same time, and the blowing device has multiple groups of blowing components corresponding to the preforming cavities 102 at the same time. The mold can blow multiple groups of bottle blanks 3 at one time, thereby improving the production efficiency of plastic bottles and improving the production benefits of the enterprise.

[0044] See also Figure 9-14When the preform preforming mold of the present invention is working, first, the movable template 104 moves toward the direction close to the fixed template 103 and fits with the fixed template 103, then, the preform 3 is inserted into the preforming cavity 102 from the feeding opening 111 from top to bottom, the mouth of the preform 3 extends out of the feeding opening 111 and is placed in the positioning countersunk hole 112, then, the blowing device moves downward, the second blowing component 204 extends into the preform 3 located in the preform cavity 102, the lower part of the positioning component 205 extends into the positioning countersunk hole 112, the mouth of the preform 3 is placed between the positioning portion 2035 of the first blowing component 203 and the positioning through hole 2051 of the positioning component 205, and the limiting plate 206 is contacted with the limiting component 11 3, the blowing device is stopped from descending, then, the air valve at the output end of the external air source is opened, and the air valve at the input end of the external air source is closed, and the air enters the bottle blank 3 located in the preforming cavity 102 through the first air path 2011 and the air inlet path 2042 in sequence and blows the bottle blank 3 to expand the bottle blank 3 to fit the wall of the preforming cavity 102, finally, the air valve at the output end of the external air source is closed, and the air valve at the input end of the external air source is opened, after the air in the bottle blank 3 is discharged, the blowing device moves upward, the movable template 104 moves in a direction away from the fixed template 103 and separates from the fixed template 103, and the preformed bottle blank 3 is extracted from the preforming cavity 102 to complete the preforming process of the bottle blank 3.

[0045] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A preform mold for a bottle blank, comprising a mold body and a blowing device mounted on a bottle blowing device, wherein the blowing device is located above the mold body and moves along the height direction of the bottle blowing device, characterized in that: The mold body comprises a bottom plate (101) for fixing the mold body on the bottle blowing device, a fixed mold plate (103) and a movable mold plate (104) arranged on the bottom plate (101) and in contact with each other and jointly forming a pre-molding cavity (102), and a mold opening and closing mechanism arranged on the movable mold plate (104) and used for moving the movable mold plate (104) in a direction close to or away from the fixed mold plate (103); the air blowing device comprises a first fixed plate (201) for fixing the air blowing device on the bottle blowing device, a second fixed plate (202) arranged on the bottom surface of the first fixed plate (201), and an air blowing component embedded in the second fixed plate (202). The blowing assembly comprises a first blowing component (203) and a second blowing component (204); a receiving cavity for embedding the second blowing component (204) is provided in the first blowing component (203); the receiving cavity is extended along the length direction of the first blowing component (203); the diameter of the receiving cavity is larger than the diameter of the outer wall of the second blowing component (204); the fixed template (103) and the movable template (104) are fitted with each other; the preform (3) is placed in the preforming cavity (102) from top to bottom; the blowing assembly extends into the preform (102) from top to bottom and blows air toward the preform (3) so that the preform (3) is expanded until it fits with the wall of the preforming cavity (102).

2. The preform mold for preformed bottles according to claim 1, characterized in that: The second fixing plate (202) is provided with a second mounting hole (2021), the diameter of the second mounting hole (2021) is equivalent to the diameter of the upper portion of the outer peripheral wall of the first blowing component (203), a first mounting structure is provided between the first blowing component (203) and the second mounting hole (2021), the first mounting structure comprising a first mounting step (2022) provided in the second mounting hole (2021), and a first mounting step (2022) provided on the first blowing component (203). The first mounting step (2022) is arranged on the lower part of the side wall of the second mounting hole (2021), the first mounting protrusion (2032) is arranged on the upper part of the outer peripheral wall of the first blowing component (203), the first blowing component (203) is inserted into the second mounting hole (2021) from top to bottom, and the first mounting protrusion (2032) abuts against the first mounting step (2022) so that the first blowing component (203) is embedded in the second mounting hole (2021).

3. The preform mold for preformed bottles according to claim 1, characterized in that: A second mounting structure is provided between the second blowing component (204) and the accommodating cavity, the second mounting structure comprising a second mounting step (2033) arranged in the accommodating cavity, and a second mounting protrusion (2041) arranged on the second blowing component (204), the second mounting step (2033) being arranged around the top of the accommodating cavity, the second mounting protrusion (2041) being arranged around the upper part of the outer peripheral wall of the second blowing component (204), the second blowing component (204) being inserted into the accommodating cavity from top to bottom, the second mounting protrusion (2041) being abutted against the second mounting step (2033) so that the second blowing component (204) is embedded in the first blowing component (203).

4. The preform mold for preformed bottles according to claim 1, characterized in that: The first fixed plate (201) is provided with a first gas path (2011) connected to the output end of an external gas source, the second fixed plate (202) is provided with a second gas path (2023) connected to the input end of the external gas source, the second blowing component (204) is provided with an air inlet path (2042) connected to the first gas path (2011) and the bottle blank (3) in the preforming cavity (102), respectively, and the second blowing component (204) extends into the accommodating cavity and forms an air outlet path (2034) connected to the bottle blank (3) in the preforming cavity (102) and the second gas path (2023), respectively, with the accommodating cavity.

5. The preform mold for preformed bottles according to claim 1, characterized in that: The mold body also includes a fixed mold pad (114) arranged on the outside of the fixed mold plate (103), and a movable mold pad (105) arranged on the outside of the movable mold plate (104); the mold opening and closing mechanism is arranged on the movable mold pad (105); the mold opening and closing mechanism includes a driving component (109) fixedly mounted on the movable mold pad (105), a mechanism bracket (110) fixedly mounted on the movable end of the driving component (109), and a plurality of guide structures arranged between the mechanism bracket (110) and the movable mold pad (105); the guide structure includes a guide hole (1051) arranged on the movable mold pad (105), and a guide rod arranged on the mechanism bracket (110) and corresponding to the guide hole (1051). (1101), the guide rod (1101) is extended along the movement direction of the movable template (104), the depth of the guide hole (1051) is greater than the diameter of the preform (3) after preforming, the movable end of the driving component (109) moves toward its fixed end, the end of the guide rod (1101) moves toward the bottom end of the guide hole (1051), so that the movable template (104) moves away from the fixed template (103), the movable end of the driving component (109) moves toward the mechanism bracket (110), and the end of the guide rod (1101) moves toward the top end of the guide hole (1051), so that the movable template (104) moves toward the direction close to the fixed template (103).

6. The preform mold for preformed bottles according to claim 1, characterized in that: The first blowing component (203) is provided with a positioning portion (2035) for positioning the bottle mouth of the bottle blank (3); the positioning portion (2035) is arranged at the bottom end of the first blowing component (203) and extends downward; the central axis of the positioning portion (2035) coincides with the central axis of the accommodating cavity; the diameter of the outer peripheral wall of the positioning portion (2035) is slightly smaller than the diameter of the inner cavity of the bottle mouth of the bottle blank (3) so that the positioning portion (2035) extends from top to bottom into the bottle mouth of the bottle blank (3).

7. The preform mold for preformed bottles according to claim 1, characterized in that: The top of the preforming cavity (102) is provided with an inlet opening (111) for the mouth of the bottle blank (3) to extend out of the preforming cavity (102); the diameter of the inlet opening (111) is larger than the outer peripheral wall of the bottle body of the bottle blank (3) so that the bottle blank (3) can be inserted into the preforming cavity (102) from top to bottom through the inlet opening (111); a positioning structure is provided between the inlet opening (111) and the first blowing component (203); the positioning structure includes a positioning structure provided at the inlet opening The first blowing component (203) has a positioning countersunk hole (112) arranged on the periphery of the first blowing component (111), and a positioning component (205) arranged at the bottom end of the first blowing component (203), the shape of the lower portion of the outer peripheral wall of the positioning component (205) matches the shape of the positioning countersunk hole (112), the blowing device moves downward and approaches the mold body, and the lower portion of the positioning component (205) extends into the positioning countersunk hole (112), so that the second blowing component (204) is aligned with the feed opening (111) and extends into the preforming cavity (102).

8. The preform mold for preformed bottles according to claim 7, characterized in that: The positioning component (205) is provided with a positioning through hole (2051) for positioning the bottle mouth of the bottle blank (3); the positioning through hole (2051) is arranged at the bottom end of the positioning component (205); the diameter of the positioning through hole (2051) is slightly larger than the outer peripheral wall size of the bottle mouth of the bottle blank (3) so that the bottle mouth of the bottle blank (3) extends from bottom to top into the positioning through hole (2051).

9. The preform mold for preformed bottles according to claim 1, characterized in that: A limiting structure is also provided between the blowing device and the mold body, and the limiting structure comprises a limiting plate (206) provided on the blowing device, and a limiting component (113) provided on the mold body, wherein the limiting plate (206) is fixedly mounted on the lower part of the first blowing component (203), and the limiting component (113) is composed of a plurality of groups and is fixedly mounted on the top surface of the mold body. When the blowing device moves downward and approaches the mold body, the bottom surface of the limiting plate (206) abuts against the limiting component (113) to limit the blowing device from continuing to move downward.

10. The preform mold for a preformed bottle according to any one of claims 1 to 9, characterized in that: The mold body is provided with a plurality of groups of pre-forming cavities (102), and the plurality of groups of pre-forming cavities (102) are arranged at intervals along the length direction of the mold body; the blowing device is provided with a plurality of groups of blowing components corresponding to the number of the pre-forming cavities (102), and the plurality of blowing components are arranged at intervals along the length direction of the second fixed plate (202).

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